299 files changed, 5316 insertions, 1828 deletions

diff --git a/Documentation/acpi/enumeration.txt b/Documentation/acpi/enumeration.txt
index b60d2ab69497..9b121a569ab4 100644
--- a/Documentation/acpi/enumeration.txt
+++ b/Documentation/acpi/enumeration.txt
@@ -243,7 +243,7 @@ input driver:
                         .owner  = THIS_MODULE,
                         .pm     = &mpu3050_pm,
                         .of_match_table = mpu3050_of_match,
-                        .acpi_match_table  ACPI_PTR(mpu3050_acpi_match),
+                        .acpi_match_table = ACPI_PTR(mpu3050_acpi_match),
                 },
                 .probe          = mpu3050_probe,
                 .remove         = mpu3050_remove,
diff --git a/Documentation/cpu-freq/intel-pstate.txt b/Documentation/cpu-freq/intel-pstate.txt
index 765d7fc0e692..655750743fb0 100644
--- a/Documentation/cpu-freq/intel-pstate.txt
+++ b/Documentation/cpu-freq/intel-pstate.txt
@@ -37,6 +37,14 @@ controlling P state selection. These files have been added to
       no_turbo: limits the driver to selecting P states below the turbo
       frequency range.
 
+      turbo_pct: displays the percentage of the total performance that
+      is supported by hardware that is in the turbo range.  This number
+      is independent of whether turbo has been disabled or not.
+
+      num_pstates: displays the number of pstates that are supported
+      by hardware.  This number is independent of whether turbo has
+      been disabled or not.
+
 For contemporary Intel processors, the frequency is controlled by the
 processor itself and the P-states exposed to software are related to
 performance levels.  The idea that frequency can be set to a single
diff --git a/Documentation/devicetree/bindings/devfreq/event/exynos-ppmu.txt b/Documentation/devicetree/bindings/devfreq/event/exynos-ppmu.txt
new file mode 100644
index 000000000000..b54bf3a2ff57
--- /dev/null
+++ b/Documentation/devicetree/bindings/devfreq/event/exynos-ppmu.txt
@@ -0,0 +1,110 @@
+
+* Samsung Exynos PPMU (Platform Performance Monitoring Unit) device
+
+The Samsung Exynos SoC has PPMU (Platform Performance Monitoring Unit) for
+each IP. PPMU provides the primitive values to get performance data. These
+PPMU events provide information of the SoC's behaviors so that you may
+use to analyze system performance, to make behaviors visible and to count
+usages of each IP (DMC, CPU, RIGHTBUS, LEFTBUS, CAM interface, LCD, G3D, MFC).
+The Exynos PPMU driver uses the devfreq-event class to provide event data
+to various devfreq devices. The devfreq devices would use the event data when
+derterming the current state of each IP.
+
+Required properties:
+- compatible: Should be "samsung,exynos-ppmu".
+- reg: physical base address of each PPMU and length of memory mapped region.
+
+Optional properties:
+- clock-names : the name of clock used by the PPMU, "ppmu"
+- clocks : phandles for clock specified in "clock-names" property
+- #clock-cells: should be 1.
+
+Example1 : PPMU nodes in exynos3250.dtsi are listed below.
+
+                ppmu_dmc0: ppmu_dmc0@106a0000 {
+                        compatible = "samsung,exynos-ppmu";
+                        reg = <0x106a0000 0x2000>;
+                        status = "disabled";
+                };
+
+                ppmu_dmc1: ppmu_dmc1@106b0000 {
+                        compatible = "samsung,exynos-ppmu";
+                        reg = <0x106b0000 0x2000>;
+                        status = "disabled";
+                };
+
+                ppmu_cpu: ppmu_cpu@106c0000 {
+                        compatible = "samsung,exynos-ppmu";
+                        reg = <0x106c0000 0x2000>;
+                        status = "disabled";
+                };
+
+                ppmu_rightbus: ppmu_rightbus@112a0000 {
+                        compatible = "samsung,exynos-ppmu";
+                        reg = <0x112a0000 0x2000>;
+                        clocks = <&cmu CLK_PPMURIGHT>;
+                        clock-names = "ppmu";
+                        status = "disabled";
+                };
+
+                ppmu_leftbus: ppmu_leftbus0@116a0000 {
+                        compatible = "samsung,exynos-ppmu";
+                        reg = <0x116a0000 0x2000>;
+                        clocks = <&cmu CLK_PPMULEFT>;
+                        clock-names = "ppmu";
+                        status = "disabled";
+                };
+
+Example2 : Events of each PPMU node in exynos3250-rinato.dts are listed below.
+
+        &ppmu_dmc0 {
+                status = "okay";
+
+                events {
+                        ppmu_dmc0_3: ppmu-event3-dmc0 {
+                                event-name = "ppmu-event3-dmc0";
+                        };
+
+                        ppmu_dmc0_2: ppmu-event2-dmc0 {
+                                event-name = "ppmu-event2-dmc0";
+                        };
+
+                        ppmu_dmc0_1: ppmu-event1-dmc0 {
+                                event-name = "ppmu-event1-dmc0";
+                        };
+
+                        ppmu_dmc0_0: ppmu-event0-dmc0 {
+                                event-name = "ppmu-event0-dmc0";
+                        };
+                };
+        };
+
+        &ppmu_dmc1 {
+                status = "okay";
+
+                events {
+                        ppmu_dmc1_3: ppmu-event3-dmc1 {
+                                event-name = "ppmu-event3-dmc1";
+                        };
+                };
+        };
+
+        &ppmu_leftbus {
+                status = "okay";
+
+                events {
+                        ppmu_leftbus_3: ppmu-event3-leftbus {
+                                event-name = "ppmu-event3-leftbus";
+                        };
+                };
+        };
+
+        &ppmu_rightbus {
+                status = "okay";
+
+                events {
+                        ppmu_rightbus_3: ppmu-event3-rightbus {
+                                event-name = "ppmu-event3-rightbus";
+                        };
+                };
+        };
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 176d4fe4f076..f06f1f609cb7 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1470,6 +1470,9 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                        no_hwp
                          Do not enable hardware P state control (HWP)
                          if available.
+                hwp_only
+                        Only load intel_pstate on systems which support
+                        hardware P state control (HWP) if available.
 
         intremap=       [X86-64, Intel-IOMMU]
                         on      enable Interrupt Remapping (default)
diff --git a/Documentation/power/s2ram.txt b/Documentation/power/s2ram.txt
index 1bdfa0443773..4685aee197fd 100644
--- a/Documentation/power/s2ram.txt
+++ b/Documentation/power/s2ram.txt
@@ -69,6 +69,10 @@ Reason for this is that the RTC is the only reliably available piece of
 hardware during resume operations where a value can be set that will
 survive a reboot.
 
+pm_trace is not compatible with asynchronous suspend, so it turns
+asynchronous suspend off (which may work around timing or
+ordering-sensitive bugs).
+
 Consequence is that after a resume (even if it is successful) your system
 clock will have a value corresponding to the magic number instead of the
 correct date/time! It is therefore advisable to use a program like ntp-date
diff --git a/MAINTAINERS b/MAINTAINERS
index b1ddeb69cd9f..54c7ce00d85f 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -270,12 +270,12 @@ F:	drivers/acpi/
 F:      drivers/pnp/pnpacpi/
 F:      include/linux/acpi.h
 F:      include/acpi/
-F:      Documentation/acpi
+F:      Documentation/acpi/
 F:      Documentation/ABI/testing/sysfs-bus-acpi
 F:      drivers/pci/*acpi*
 F:      drivers/pci/*/*acpi*
 F:      drivers/pci/*/*/*acpi*
-F:      tools/power/acpi
+F:      tools/power/acpi/
 
 ACPI COMPONENT ARCHITECTURE (ACPICA)
 M:      Robert Moore <robert.moore@intel.com>
diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c
index ddd75c58b1e8..ab19b7c03423 100644
--- a/arch/arm/kernel/bios32.c
+++ b/arch/arm/kernel/bios32.c
@@ -422,17 +422,16 @@ static int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
 static int pcibios_init_resources(int busnr, struct pci_sys_data *sys)
 {
         int ret;
-        struct pci_host_bridge_window *window;
+        struct resource_entry *window;
 
         if (list_empty(&sys->resources)) {
                 pci_add_resource_offset(&sys->resources,
                          &iomem_resource, sys->mem_offset);
         }
 
-        list_for_each_entry(window, &sys->resources, list) {
+        resource_list_for_each_entry(window, &sys->resources)
                 if (resource_type(window->res) == IORESOURCE_IO)
                         return 0;
-        }
 
         sys->io_res.start = (busnr * SZ_64K) ?  : pcibios_min_io;
         sys->io_res.end = (busnr + 1) * SZ_64K - 1;
diff --git a/arch/ia64/kernel/acpi-ext.c b/arch/ia64/kernel/acpi-ext.c
index 8b9318d311a0..bd09bf74f187 100644
--- a/arch/ia64/kernel/acpi-ext.c
+++ b/arch/ia64/kernel/acpi-ext.c
@@ -69,10 +69,10 @@ static acpi_status find_csr_space(struct acpi_resource *resource, void *data)
         status = acpi_resource_to_address64(resource, &addr);
         if (ACPI_SUCCESS(status) &&
             addr.resource_type == ACPI_MEMORY_RANGE &&
-            addr.address_length &&
+            addr.address.address_length &&
             addr.producer_consumer == ACPI_CONSUMER) {
-                space->base = addr.minimum;
-                space->length = addr.address_length;
+                space->base = addr.address.minimum;
+                space->length = addr.address.address_length;
                 return AE_CTRL_TERMINATE;
         }
         return AE_OK;           /* keep looking */
diff --git a/arch/ia64/kernel/acpi.c b/arch/ia64/kernel/acpi.c
index e795cb848154..2c4498919d3c 100644
--- a/arch/ia64/kernel/acpi.c
+++ b/arch/ia64/kernel/acpi.c
@@ -380,9 +380,6 @@ static void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
 
 static int __init acpi_parse_madt(struct acpi_table_header *table)
 {
-        if (!table)
-                return -EINVAL;
-
         acpi_madt = (struct acpi_table_madt *)table;
 
         acpi_madt_rev = acpi_madt->header.revision;
@@ -645,9 +642,6 @@ static int __init acpi_parse_fadt(struct acpi_table_header *table)
         struct acpi_table_header *fadt_header;
         struct acpi_table_fadt *fadt;
 
-        if (!table)
-                return -EINVAL;
-
         fadt_header = (struct acpi_table_header *)table;
         if (fadt_header->revision != 3)
                 return -ENODEV; /* Only deal with ACPI 2.0 FADT */
diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c
index 900cc93e5409..48cc65705db4 100644
--- a/arch/ia64/pci/pci.c
+++ b/arch/ia64/pci/pci.c
@@ -188,12 +188,12 @@ static u64 add_io_space(struct pci_root_info *info,
 
         name = (char *)(iospace + 1);
 
-        min = addr->minimum;
-        max = min + addr->address_length - 1;
+        min = addr->address.minimum;
+        max = min + addr->address.address_length - 1;
         if (addr->info.io.translation_type == ACPI_SPARSE_TRANSLATION)
                 sparse = 1;
 
-        space_nr = new_space(addr->translation_offset, sparse);
+        space_nr = new_space(addr->address.translation_offset, sparse);
         if (space_nr == ~0)
                 goto free_resource;
 
@@ -247,7 +247,7 @@ static acpi_status resource_to_window(struct acpi_resource *resource,
         if (ACPI_SUCCESS(status) &&
             (addr->resource_type == ACPI_MEMORY_RANGE ||
              addr->resource_type == ACPI_IO_RANGE) &&
-            addr->address_length &&
+            addr->address.address_length &&
             addr->producer_consumer == ACPI_PRODUCER)
                 return AE_OK;
 
@@ -284,7 +284,7 @@ static acpi_status add_window(struct acpi_resource *res, void *data)
         if (addr.resource_type == ACPI_MEMORY_RANGE) {
                 flags = IORESOURCE_MEM;
                 root = &iomem_resource;
-                offset = addr.translation_offset;
+                offset = addr.address.translation_offset;
         } else if (addr.resource_type == ACPI_IO_RANGE) {
                 flags = IORESOURCE_IO;
                 root = &ioport_resource;
@@ -297,8 +297,8 @@ static acpi_status add_window(struct acpi_resource *res, void *data)
         resource = &info->res[info->res_num];
         resource->name = info->name;
         resource->flags = flags;
-        resource->start = addr.minimum + offset;
-        resource->end = resource->start + addr.address_length - 1;
+        resource->start = addr.address.minimum + offset;
+        resource->end = resource->start + addr.address.address_length - 1;
         info->res_offset[info->res_num] = offset;
 
         if (insert_resource(root, resource)) {
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 5e28e2be3a41..019f4e5c2b75 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -497,6 +497,17 @@ config X86_INTEL_LPSS
           things like clock tree (common clock framework) and pincontrol
           which are needed by the LPSS peripheral drivers.
 
+config X86_AMD_PLATFORM_DEVICE
+        bool "AMD ACPI2Platform devices support"
+        depends on ACPI
+        select COMMON_CLK
+        select PINCTRL
+        ---help---
+          Select to interpret AMD specific ACPI device to platform device
+          such as I2C, UART, GPIO found on AMD Carrizo and later chipsets.
+          I2C and UART depend on COMMON_CLK to set clock. GPIO driver is
+          implemented under PINCTRL subsystem.
+
 config IOSF_MBI
         tristate "Intel SoC IOSF Sideband support for SoC platforms"
         depends on PCI
diff --git a/arch/x86/include/asm/pci_x86.h b/arch/x86/include/asm/pci_x86.h
index 164e3f8d3c3d..fa1195dae425 100644
--- a/arch/x86/include/asm/pci_x86.h
+++ b/arch/x86/include/asm/pci_x86.h
@@ -93,8 +93,6 @@ extern raw_spinlock_t pci_config_lock;
 extern int (*pcibios_enable_irq)(struct pci_dev *dev);
 extern void (*pcibios_disable_irq)(struct pci_dev *dev);
 
-extern bool mp_should_keep_irq(struct device *dev);
-
 struct pci_raw_ops {
         int (*read)(unsigned int domain, unsigned int bus, unsigned int devfn,
                                                 int reg, int len, u32 *val);
diff --git a/arch/x86/include/uapi/asm/msr-index.h b/arch/x86/include/uapi/asm/msr-index.h
index d979e5abae55..536240fa9a95 100644
--- a/arch/x86/include/uapi/asm/msr-index.h
+++ b/arch/x86/include/uapi/asm/msr-index.h
@@ -152,6 +152,10 @@
 #define MSR_CC6_DEMOTION_POLICY_CONFIG  0x00000668
 #define MSR_MC6_DEMOTION_POLICY_CONFIG  0x00000669
 
+#define MSR_CORE_PERF_LIMIT_REASONS     0x00000690
+#define MSR_GFX_PERF_LIMIT_REASONS      0x000006B0
+#define MSR_RING_PERF_LIMIT_REASONS     0x000006B1
+
 /* Hardware P state interface */
 #define MSR_PPERF                       0x0000064e
 #define MSR_PERF_LIMIT_REASONS          0x0000064f
@@ -362,6 +366,7 @@
 
 #define MSR_IA32_PERF_STATUS            0x00000198
 #define MSR_IA32_PERF_CTL               0x00000199
+#define INTEL_PERF_CTL_MASK             0xffff
 #define MSR_AMD_PSTATE_DEF_BASE         0xc0010064
 #define MSR_AMD_PERF_STATUS             0xc0010063
 #define MSR_AMD_PERF_CTL                0xc0010062
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index a18fff361c7f..ae97ed0873c6 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -845,13 +845,7 @@ int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base)
 
 static int __init acpi_parse_sbf(struct acpi_table_header *table)
 {
-        struct acpi_table_boot *sb;
-
-        sb = (struct acpi_table_boot *)table;
-        if (!sb) {
-                printk(KERN_WARNING PREFIX "Unable to map SBF\n");
-                return -ENODEV;
-        }
+        struct acpi_table_boot *sb = (struct acpi_table_boot *)table;
 
         sbf_port = sb->cmos_index;      /* Save CMOS port */
 
@@ -865,13 +859,7 @@ static struct resource *hpet_res __initdata;
 
 static int __init acpi_parse_hpet(struct acpi_table_header *table)
 {
-        struct acpi_table_hpet *hpet_tbl;
-
-        hpet_tbl = (struct acpi_table_hpet *)table;
-        if (!hpet_tbl) {
-                printk(KERN_WARNING PREFIX "Unable to map HPET\n");
-                return -ENODEV;
-        }
+        struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;
 
         if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {
                 printk(KERN_WARNING PREFIX "HPET timers must be located in "
diff --git a/arch/x86/pci/acpi.c b/arch/x86/pci/acpi.c
index cfd1b132b8e3..6ac273832f28 100644
--- a/arch/x86/pci/acpi.c
+++ b/arch/x86/pci/acpi.c
@@ -10,9 +10,6 @@
 struct pci_root_info {
         struct acpi_device *bridge;
         char name[16];
-        unsigned int res_num;
-        struct resource *res;
-        resource_size_t *res_offset;
         struct pci_sysdata sd;
 #ifdef  CONFIG_PCI_MMCONFIG
         bool mcfg_added;
@@ -218,130 +215,41 @@ static void teardown_mcfg_map(struct pci_root_info *info)
 }
 #endif
 
-static acpi_status resource_to_addr(struct acpi_resource *resource,
-                                    struct acpi_resource_address64 *addr)
-{
-        acpi_status status;
-        struct acpi_resource_memory24 *memory24;
-        struct acpi_resource_memory32 *memory32;
-        struct acpi_resource_fixed_memory32 *fixed_memory32;
-
-        memset(addr, 0, sizeof(*addr));
-        switch (resource->type) {
-        case ACPI_RESOURCE_TYPE_MEMORY24:
-                memory24 = &resource->data.memory24;
-                addr->resource_type = ACPI_MEMORY_RANGE;
-                addr->minimum = memory24->minimum;
-                addr->address_length = memory24->address_length;
-                addr->maximum = addr->minimum + addr->address_length - 1;
-                return AE_OK;
-        case ACPI_RESOURCE_TYPE_MEMORY32:
-                memory32 = &resource->data.memory32;
-                addr->resource_type = ACPI_MEMORY_RANGE;
-                addr->minimum = memory32->minimum;
-                addr->address_length = memory32->address_length;
-                addr->maximum = addr->minimum + addr->address_length - 1;
-                return AE_OK;
-        case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
-                fixed_memory32 = &resource->data.fixed_memory32;
-                addr->resource_type = ACPI_MEMORY_RANGE;
-                addr->minimum = fixed_memory32->address;
-                addr->address_length = fixed_memory32->address_length;
-                addr->maximum = addr->minimum + addr->address_length - 1;
-                return AE_OK;
-        case ACPI_RESOURCE_TYPE_ADDRESS16:
-        case ACPI_RESOURCE_TYPE_ADDRESS32:
-        case ACPI_RESOURCE_TYPE_ADDRESS64:
-                status = acpi_resource_to_address64(resource, addr);
-                if (ACPI_SUCCESS(status) &&
-                    (addr->resource_type == ACPI_MEMORY_RANGE ||
-                    addr->resource_type == ACPI_IO_RANGE) &&
-                    addr->address_length > 0) {
-                        return AE_OK;
-                }
-                break;
-        }
-        return AE_ERROR;
-}
-
-static acpi_status count_resource(struct acpi_resource *acpi_res, void *data)
+static void validate_resources(struct device *dev, struct list_head *crs_res,
+                               unsigned long type)
 {
-        struct pci_root_info *info = data;
-        struct acpi_resource_address64 addr;
-        acpi_status status;
-
-        status = resource_to_addr(acpi_res, &addr);
-        if (ACPI_SUCCESS(status))
-                info->res_num++;
-        return AE_OK;
-}
-
-static acpi_status setup_resource(struct acpi_resource *acpi_res, void *data)
-{
-        struct pci_root_info *info = data;
-        struct resource *res;
-        struct acpi_resource_address64 addr;
-        acpi_status status;
-        unsigned long flags;
-        u64 start, orig_end, end;
-
-        status = resource_to_addr(acpi_res, &addr);
-        if (!ACPI_SUCCESS(status))
-                return AE_OK;
-
-        if (addr.resource_type == ACPI_MEMORY_RANGE) {
-                flags = IORESOURCE_MEM;
-                if (addr.info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
-                        flags |= IORESOURCE_PREFETCH;
-        } else if (addr.resource_type == ACPI_IO_RANGE) {
-                flags = IORESOURCE_IO;
-        } else
-                return AE_OK;
-
-        start = addr.minimum + addr.translation_offset;
-        orig_end = end = addr.maximum + addr.translation_offset;
-
-        /* Exclude non-addressable range or non-addressable portion of range */
-        end = min(end, (u64)iomem_resource.end);
-        if (end <= start) {
-                dev_info(&info->bridge->dev,
-                        "host bridge window [%#llx-%#llx] "
-                        "(ignored, not CPU addressable)\n", start, orig_end);
-                return AE_OK;
-        } else if (orig_end != end) {
-                dev_info(&info->bridge->dev,
-                        "host bridge window [%#llx-%#llx] "
-                        "([%#llx-%#llx] ignored, not CPU addressable)\n", 
-                        start, orig_end, end + 1, orig_end);
-        }
+        LIST_HEAD(list);
+        struct resource *res1, *res2, *root = NULL;
+        struct resource_entry *tmp, *entry, *entry2;
 
-        res = &info->res[info->res_num];
-        res->name = info->name;
-        res->flags = flags;
-        res->start = start;
-        res->end = end;
-        info->res_offset[info->res_num] = addr.translation_offset;
-        info->res_num++;
+        BUG_ON((type & (IORESOURCE_MEM | IORESOURCE_IO)) == 0);
+        root = (type & IORESOURCE_MEM) ? &iomem_resource : &ioport_resource;
 
-        if (!pci_use_crs)
-                dev_printk(KERN_DEBUG, &info->bridge->dev,
-                           "host bridge window %pR (ignored)\n", res);
+        list_splice_init(crs_res, &list);
+        resource_list_for_each_entry_safe(entry, tmp, &list) {
+                bool free = false;
+                resource_size_t end;
 
-        return AE_OK;
-}
-
-static void coalesce_windows(struct pci_root_info *info, unsigned long type)
-{
-        int i, j;
-        struct resource *res1, *res2;
-
-        for (i = 0; i < info->res_num; i++) {
-                res1 = &info->res[i];
+                res1 = entry->res;
                 if (!(res1->flags & type))
-                        continue;
+                        goto next;
+
+                /* Exclude non-addressable range or non-addressable portion */
+                end = min(res1->end, root->end);
+                if (end <= res1->start) {
+                        dev_info(dev, "host bridge window %pR (ignored, not CPU addressable)\n",
+                                 res1);
+                        free = true;
+                        goto next;
+                } else if (res1->end != end) {
+                        dev_info(dev, "host bridge window %pR ([%#llx-%#llx] ignored, not CPU addressable)\n",
+                                 res1, (unsigned long long)end + 1,
+                                 (unsigned long long)res1->end);
+                        res1->end = end;
+                }
 
-                for (j = i + 1; j < info->res_num; j++) {
-                        res2 = &info->res[j];
+                resource_list_for_each_entry(entry2, crs_res) {
+                        res2 = entry2->res;
                         if (!(res2->flags & type))
                                 continue;
 
@@ -353,118 +261,92 @@ static void coalesce_windows(struct pci_root_info *info, unsigned long type)
                         if (resource_overlaps(res1, res2)) {
                                 res2->start = min(res1->start, res2->start);
                                 res2->end = max(res1->end, res2->end);
-                                dev_info(&info->bridge->dev,
-                                         "host bridge window expanded to %pR; %pR ignored\n",
+                                dev_info(dev, "host bridge window expanded to %pR; %pR ignored\n",
                                          res2, res1);
-                                res1->flags = 0;
+                                free = true;
+                                goto next;
                         }
                 }
+
+next:
+                resource_list_del(entry);
+                if (free)
+                        resource_list_free_entry(entry);
+                else
+                        resource_list_add_tail(entry, crs_res);
         }
 }
 
 static void add_resources(struct pci_root_info *info,
-                          struct list_head *resources)
+                          struct list_head *resources,
+                          struct list_head *crs_res)
 {
-        int i;
-        struct resource *res, *root, *conflict;
-
-        coalesce_windows(info, IORESOURCE_MEM);
-        coalesce_windows(info, IORESOURCE_IO);
+        struct resource_entry *entry, *tmp;
+        struct resource *res, *conflict, *root = NULL;
 
-        for (i = 0; i < info->res_num; i++) {
-                res = &info->res[i];
+        validate_resources(&info->bridge->dev, crs_res, IORESOURCE_MEM);
+        validate_resources(&info->bridge->dev, crs_res, IORESOURCE_IO);
 
+        resource_list_for_each_entry_safe(entry, tmp, crs_res) {
+                res = entry->res;
                 if (res->flags & IORESOURCE_MEM)
                         root = &iomem_resource;
                 else if (res->flags & IORESOURCE_IO)
                         root = &ioport_resource;
                 else
-                        continue;
+                        BUG_ON(res);
 
                 conflict = insert_resource_conflict(root, res);
-                if (conflict)
+                if (conflict) {
                         dev_info(&info->bridge->dev,
                                  "ignoring host bridge window %pR (conflicts with %s %pR)\n",
                                  res, conflict->name, conflict);
-                else
-                        pci_add_resource_offset(resources, res,
-                                        info->res_offset[i]);
+                        resource_list_destroy_entry(entry);
+                }
         }
-}
 
-static void free_pci_root_info_res(struct pci_root_info *info)
-{
-        kfree(info->res);
-        info->res = NULL;
-        kfree(info->res_offset);
-        info->res_offset = NULL;
-        info->res_num = 0;
+        list_splice_tail(crs_res, resources);
 }
 
-static void __release_pci_root_info(struct pci_root_info *info)
+static void release_pci_root_info(struct pci_host_bridge *bridge)
 {
-        int i;
         struct resource *res;
+        struct resource_entry *entry;
+        struct pci_root_info *info = bridge->release_data;
 
-        for (i = 0; i < info->res_num; i++) {
-                res = &info->res[i];
-
-                if (!res->parent)
-                        continue;
-
-                if (!(res->flags & (IORESOURCE_MEM | IORESOURCE_IO)))
-                        continue;
-
-                release_resource(res);
+        resource_list_for_each_entry(entry, &bridge->windows) {
+                res = entry->res;
+                if (res->parent &&
+                    (res->flags & (IORESOURCE_MEM | IORESOURCE_IO)))
+                        release_resource(res);
         }
 
-        free_pci_root_info_res(info);
-
         teardown_mcfg_map(info);
-
         kfree(info);
 }
 
-static void release_pci_root_info(struct pci_host_bridge *bridge)
-{
-        struct pci_root_info *info = bridge->release_data;
-
-        __release_pci_root_info(info);
-}
-
 static void probe_pci_root_info(struct pci_root_info *info,
                                 struct acpi_device *device,
-                                int busnum, int domain)
+                                int busnum, int domain,
+                                struct list_head *list)
 {
-        size_t size;
+        int ret;
+        struct resource_entry *entry;
 
         sprintf(info->name, "PCI Bus %04x:%02x", domain, busnum);
         info->bridge = device;
-
-        info->res_num = 0;
-        acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_resource,
-                                info);
-        if (!info->res_num)
-                return;
-
-        size = sizeof(*info->res) * info->res_num;
-        info->res = kzalloc_node(size, GFP_KERNEL, info->sd.node);
-        if (!info->res) {
-                info->res_num = 0;
-                return;
-        }
-
-        size = sizeof(*info->res_offset) * info->res_num;
-        info->res_num = 0;
-        info->res_offset = kzalloc_node(size, GFP_KERNEL, info->sd.node);
-        if (!info->res_offset) {
-                kfree(info->res);
-                info->res = NULL;
-                return;
-        }
-
-        acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource,
-                                info);
+        ret = acpi_dev_get_resources(device, list,
+                                     acpi_dev_filter_resource_type_cb,
+                                     (void *)(IORESOURCE_IO | IORESOURCE_MEM));
+        if (ret < 0)
+                dev_warn(&device->dev,
+                         "failed to parse _CRS method, error code %d\n", ret);
+        else if (ret == 0)
+                dev_dbg(&device->dev,
+                        "no IO and memory resources present in _CRS\n");
+        else
+                resource_list_for_each_entry(entry, list)
+                        entry->res->name = info->name;
 }
 
 struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
@@ -473,6 +355,8 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
         struct pci_root_info *info;
         int domain = root->segment;
         int busnum = root->secondary.start;
+        struct resource_entry *res_entry;
+        LIST_HEAD(crs_res);
         LIST_HEAD(resources);
         struct pci_bus *bus;
         struct pci_sysdata *sd;
@@ -520,18 +404,22 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
                 memcpy(bus->sysdata, sd, sizeof(*sd));
                 kfree(info);
         } else {
-                probe_pci_root_info(info, device, busnum, domain);
-
                 /* insert busn res at first */
                 pci_add_resource(&resources,  &root->secondary);
+
                 /*
                  * _CRS with no apertures is normal, so only fall back to
                  * defaults or native bridge info if we're ignoring _CRS.
                  */
-                if (pci_use_crs)
-                        add_resources(info, &resources);
-                else {
-                        free_pci_root_info_res(info);
+                probe_pci_root_info(info, device, busnum, domain, &crs_res);
+                if (pci_use_crs) {
+                        add_resources(info, &resources, &crs_res);
+                } else {
+                        resource_list_for_each_entry(res_entry, &crs_res)
+                                dev_printk(KERN_DEBUG, &device->dev,
+                                           "host bridge window %pR (ignored)\n",
+                                           res_entry->res);
+                        resource_list_free(&crs_res);
                         x86_pci_root_bus_resources(busnum, &resources);
                 }
 
@@ -546,8 +434,9 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
                                 to_pci_host_bridge(bus->bridge),
                                 release_pci_root_info, info);
                 } else {
-                        pci_free_resource_list(&resources);
-                        __release_pci_root_info(info);
+                        resource_list_free(&resources);
+                        teardown_mcfg_map(info);
+                        kfree(info);
                 }
         }
 
diff --git a/arch/x86/pci/bus_numa.c b/arch/x86/pci/bus_numa.c
index f3a2cfc14125..7bcf06a7cd12 100644
--- a/arch/x86/pci/bus_numa.c
+++ b/arch/x86/pci/bus_numa.c
@@ -31,7 +31,7 @@ void x86_pci_root_bus_resources(int bus, struct list_head *resources)
 {
         struct pci_root_info *info = x86_find_pci_root_info(bus);
         struct pci_root_res *root_res;
-        struct pci_host_bridge_window *window;
+        struct resource_entry *window;
         bool found = false;
 
         if (!info)
@@ -41,7 +41,7 @@ void x86_pci_root_bus_resources(int bus, struct list_head *resources)
                bus);
 
         /* already added by acpi ? */
-        list_for_each_entry(window, resources, list)
+        resource_list_for_each_entry(window, resources)
                 if (window->res->flags & IORESOURCE_BUS) {
                         found = true;
                         break;
diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c
index 2fb384724ebb..3d2612b68694 100644
--- a/arch/x86/pci/common.c
+++ b/arch/x86/pci/common.c
@@ -513,6 +513,31 @@ void __init pcibios_set_cache_line_size(void)
         }
 }
 
+/*
+ * Some device drivers assume dev->irq won't change after calling
+ * pci_disable_device(). So delay releasing of IRQ resource to driver
+ * unbinding time. Otherwise it will break PM subsystem and drivers
+ * like xen-pciback etc.
+ */
+static int pci_irq_notifier(struct notifier_block *nb, unsigned long action,
+                            void *data)
+{
+        struct pci_dev *dev = to_pci_dev(data);
+
+        if (action != BUS_NOTIFY_UNBOUND_DRIVER)
+                return NOTIFY_DONE;
+
+        if (pcibios_disable_irq)
+                pcibios_disable_irq(dev);
+
+        return NOTIFY_OK;
+}
+
+static struct notifier_block pci_irq_nb = {
+        .notifier_call = pci_irq_notifier,
+        .priority = INT_MIN,
+};
+
 int __init pcibios_init(void)
 {
         if (!raw_pci_ops) {
@@ -525,6 +550,9 @@ int __init pcibios_init(void)
 
         if (pci_bf_sort >= pci_force_bf)
                 pci_sort_breadthfirst();
+
+        bus_register_notifier(&pci_bus_type, &pci_irq_nb);
+
         return 0;
 }
 
@@ -683,12 +711,6 @@ int pcibios_enable_device(struct pci_dev *dev, int mask)
         return 0;
 }
 
-void pcibios_disable_device (struct pci_dev *dev)
-{
-        if (!pci_dev_msi_enabled(dev) && pcibios_disable_irq)
-                pcibios_disable_irq(dev);
-}
-
 int pci_ext_cfg_avail(void)
 {
         if (raw_pci_ext_ops)
diff --git a/arch/x86/pci/intel_mid_pci.c b/arch/x86/pci/intel_mid_pci.c
index 852aa4c92da0..efb849323c74 100644
--- a/arch/x86/pci/intel_mid_pci.c
+++ b/arch/x86/pci/intel_mid_pci.c
@@ -234,10 +234,10 @@ static int intel_mid_pci_irq_enable(struct pci_dev *dev)
 
 static void intel_mid_pci_irq_disable(struct pci_dev *dev)
 {
-        if (!mp_should_keep_irq(&dev->dev) && dev->irq_managed &&
-            dev->irq > 0) {
+        if (dev->irq_managed && dev->irq > 0) {
                 mp_unmap_irq(dev->irq);
                 dev->irq_managed = 0;
+                dev->irq = 0;
         }
 }
 
diff --git a/arch/x86/pci/irq.c b/arch/x86/pci/irq.c
index 5dc6ca5e1741..e71b3dbd87b8 100644
--- a/arch/x86/pci/irq.c
+++ b/arch/x86/pci/irq.c
@@ -1256,22 +1256,9 @@ static int pirq_enable_irq(struct pci_dev *dev)
         return 0;
 }
 
-bool mp_should_keep_irq(struct device *dev)
-{
-        if (dev->power.is_prepared)
-                return true;
-#ifdef CONFIG_PM
-        if (dev->power.runtime_status == RPM_SUSPENDING)
-                return true;
-#endif
-
-        return false;
-}
-
 static void pirq_disable_irq(struct pci_dev *dev)
 {
-        if (io_apic_assign_pci_irqs && !mp_should_keep_irq(&dev->dev) &&
-            dev->irq_managed && dev->irq) {
+        if (io_apic_assign_pci_irqs && dev->irq_managed && dev->irq) {
                 mp_unmap_irq(dev->irq);
                 dev->irq = 0;
                 dev->irq_managed = 0;
diff --git a/arch/x86/pci/mmconfig-shared.c b/arch/x86/pci/mmconfig-shared.c
index 676e5e04e4d4..dd30b7e08bc2 100644
--- a/arch/x86/pci/mmconfig-shared.c
+++ b/arch/x86/pci/mmconfig-shared.c
@@ -397,12 +397,12 @@ static acpi_status check_mcfg_resource(struct acpi_resource *res, void *data)
 
         status = acpi_resource_to_address64(res, &address);
         if (ACPI_FAILURE(status) ||
-           (address.address_length <= 0) ||
+           (address.address.address_length <= 0) ||
            (address.resource_type != ACPI_MEMORY_RANGE))
                 return AE_OK;
 
-        if ((mcfg_res->start >= address.minimum) &&
-            (mcfg_res->end < (address.minimum + address.address_length))) {
+        if ((mcfg_res->start >= address.address.minimum) &&
+            (mcfg_res->end < (address.address.minimum + address.address.address_length))) {
                 mcfg_res->flags = 1;
                 return AE_CTRL_TERMINATE;
         }
diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index 8951cefb0a96..e6c3ddd92665 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -315,6 +315,12 @@ config ACPI_HOTPLUG_MEMORY
           To compile this driver as a module, choose M here:
           the module will be called acpi_memhotplug.
 
+config ACPI_HOTPLUG_IOAPIC
+        bool
+        depends on PCI
+        depends on X86_IO_APIC
+        default y
+
 config ACPI_SBS
         tristate "Smart Battery System"
         depends on X86
diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
index f74317cc1ca9..b18cd2151ddb 100644
--- a/drivers/acpi/Makefile
+++ b/drivers/acpi/Makefile
@@ -40,7 +40,7 @@ acpi-$(CONFIG_ARCH_MIGHT_HAVE_ACPI_PDC) += processor_pdc.o
 acpi-y                          += ec.o
 acpi-$(CONFIG_ACPI_DOCK)        += dock.o
 acpi-y                          += pci_root.o pci_link.o pci_irq.o
-acpi-y                          += acpi_lpss.o
+acpi-y                          += acpi_lpss.o acpi_apd.o
 acpi-y                          += acpi_platform.o
 acpi-y                          += acpi_pnp.o
 acpi-y                          += int340x_thermal.o
@@ -70,6 +70,7 @@ obj-$(CONFIG_ACPI_PROCESSOR)	+= processor.o
 obj-y                           += container.o
 obj-$(CONFIG_ACPI_THERMAL)      += thermal.o
 obj-y                           += acpi_memhotplug.o
+obj-$(CONFIG_ACPI_HOTPLUG_IOAPIC) += ioapic.o
 obj-$(CONFIG_ACPI_BATTERY)      += battery.o
 obj-$(CONFIG_ACPI_SBS)          += sbshc.o
 obj-$(CONFIG_ACPI_SBS)          += sbs.o
diff --git a/drivers/acpi/acpi_apd.c b/drivers/acpi/acpi_apd.c
new file mode 100644
index 000000000000..3984ea96e5f7
--- /dev/null
+++ b/drivers/acpi/acpi_apd.c
@@ -0,0 +1,150 @@
+/*
+ * AMD ACPI support for ACPI2platform device.
+ *
+ * Copyright (c) 2014,2015 AMD Corporation.
+ * Authors: Ken Xue <Ken.Xue@amd.com>
+ *      Wu, Jeff <Jeff.Wu@amd.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/platform_device.h>
+#include <linux/pm_domain.h>
+#include <linux/clkdev.h>
+#include <linux/acpi.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+#include <linux/pm.h>
+
+#include "internal.h"
+
+ACPI_MODULE_NAME("acpi_apd");
+struct apd_private_data;
+
+/**
+ * ACPI_APD_SYSFS : add device attributes in sysfs
+ * ACPI_APD_PM : attach power domain to device
+ */
+#define ACPI_APD_SYSFS  BIT(0)
+#define ACPI_APD_PM     BIT(1)
+
+/**
+ * struct apd_device_desc - a descriptor for apd device
+ * @flags: device flags like %ACPI_APD_SYSFS, %ACPI_APD_PM
+ * @fixed_clk_rate: fixed rate input clock source for acpi device;
+ *                      0 means no fixed rate input clock source
+ * @setup: a hook routine to set device resource during create platform device
+ *
+ * Device description defined as acpi_device_id.driver_data
+ */
+struct apd_device_desc {
+        unsigned int flags;
+        unsigned int fixed_clk_rate;
+        int (*setup)(struct apd_private_data *pdata);
+};
+
+struct apd_private_data {
+        struct clk *clk;
+        struct acpi_device *adev;
+        const struct apd_device_desc *dev_desc;
+};
+
+#ifdef CONFIG_X86_AMD_PLATFORM_DEVICE
+#define APD_ADDR(desc)  ((unsigned long)&desc)
+
+static int acpi_apd_setup(struct apd_private_data *pdata)
+{
+        const struct apd_device_desc *dev_desc = pdata->dev_desc;
+        struct clk *clk = ERR_PTR(-ENODEV);
+
+        if (dev_desc->fixed_clk_rate) {
+                clk = clk_register_fixed_rate(&pdata->adev->dev,
+                                        dev_name(&pdata->adev->dev),
+                                        NULL, CLK_IS_ROOT,
+                                        dev_desc->fixed_clk_rate);
+                clk_register_clkdev(clk, NULL, dev_name(&pdata->adev->dev));
+                pdata->clk = clk;
+        }
+
+        return 0;
+}
+
+static struct apd_device_desc cz_i2c_desc = {
+        .setup = acpi_apd_setup,
+        .fixed_clk_rate = 133000000,
+};
+
+static struct apd_device_desc cz_uart_desc = {
+        .setup = acpi_apd_setup,
+        .fixed_clk_rate = 48000000,
+};
+
+#else
+
+#define APD_ADDR(desc) (0UL)
+
+#endif /* CONFIG_X86_AMD_PLATFORM_DEVICE */
+
+/**
+* Create platform device during acpi scan attach handle.
+* Return value > 0 on success of creating device.
+*/
+static int acpi_apd_create_device(struct acpi_device *adev,
+                                   const struct acpi_device_id *id)
+{
+        const struct apd_device_desc *dev_desc = (void *)id->driver_data;
+        struct apd_private_data *pdata;
+        struct platform_device *pdev;
+        int ret;
+
+        if (!dev_desc) {
+                pdev = acpi_create_platform_device(adev);
+                return IS_ERR_OR_NULL(pdev) ? PTR_ERR(pdev) : 1;
+        }
+
+        pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
+        if (!pdata)
+                return -ENOMEM;
+
+        pdata->adev = adev;
+        pdata->dev_desc = dev_desc;
+
+        if (dev_desc->setup) {
+                ret = dev_desc->setup(pdata);
+                if (ret)
+                        goto err_out;
+        }
+
+        adev->driver_data = pdata;
+        pdev = acpi_create_platform_device(adev);
+        if (!IS_ERR_OR_NULL(pdev))
+                return 1;
+
+        ret = PTR_ERR(pdev);
+        adev->driver_data = NULL;
+
+ err_out:
+        kfree(pdata);
+        return ret;
+}
+
+static const struct acpi_device_id acpi_apd_device_ids[] = {
+        /* Generic apd devices */
+        { "AMD0010", APD_ADDR(cz_i2c_desc) },
+        { "AMD0020", APD_ADDR(cz_uart_desc) },
+        { "AMD0030", },
+        { }
+};
+
+static struct acpi_scan_handler apd_handler = {
+        .ids = acpi_apd_device_ids,
+        .attach = acpi_apd_create_device,
+};
+
+void __init acpi_apd_init(void)
+{
+        acpi_scan_add_handler(&apd_handler);
+}
diff --git a/drivers/acpi/acpi_lpss.c b/drivers/acpi/acpi_lpss.c
index e75737fd7eef..02e835f3cf8a 100644
--- a/drivers/acpi/acpi_lpss.c
+++ b/drivers/acpi/acpi_lpss.c
@@ -125,7 +125,7 @@ static struct lpss_device_desc lpt_dev_desc = {
 };
 
 static struct lpss_device_desc lpt_i2c_dev_desc = {
-        .flags = LPSS_CLK | LPSS_CLK_GATE | LPSS_LTR,
+        .flags = LPSS_CLK | LPSS_LTR,
         .prv_offset = 0x800,
 };
 
@@ -307,7 +307,7 @@ static int acpi_lpss_create_device(struct acpi_device *adev,
 {
         struct lpss_device_desc *dev_desc;
         struct lpss_private_data *pdata;
-        struct resource_list_entry *rentry;
+        struct resource_entry *rentry;
         struct list_head resource_list;
         struct platform_device *pdev;
         int ret;
@@ -327,13 +327,15 @@ static int acpi_lpss_create_device(struct acpi_device *adev,
                 goto err_out;
 
         list_for_each_entry(rentry, &resource_list, node)
-                if (resource_type(&rentry->res) == IORESOURCE_MEM) {
+                if (resource_type(rentry->res) == IORESOURCE_MEM) {
                         if (dev_desc->prv_size_override)
                                 pdata->mmio_size = dev_desc->prv_size_override;
                         else
-                                pdata->mmio_size = resource_size(&rentry->res);
-                        pdata->mmio_base = ioremap(rentry->res.start,
+                                pdata->mmio_size = resource_size(rentry->res);
+                        pdata->mmio_base = ioremap(rentry->res->start,
                                                    pdata->mmio_size);
+                        if (!pdata->mmio_base)
+                                goto err_out;
                         break;
                 }
 
diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c
index 23e2319ead41..ee28f4d15625 100644
--- a/drivers/acpi/acpi_memhotplug.c
+++ b/drivers/acpi/acpi_memhotplug.c
@@ -101,8 +101,8 @@ acpi_memory_get_resource(struct acpi_resource *resource, void *context)
                 /* Can we combine the resource range information? */
                 if ((info->caching == address64.info.mem.caching) &&
                     (info->write_protect == address64.info.mem.write_protect) &&
-                    (info->start_addr + info->length == address64.minimum)) {
-                        info->length += address64.address_length;
+                    (info->start_addr + info->length == address64.address.minimum)) {
+                        info->length += address64.address.address_length;
                         return AE_OK;
                 }
         }
@@ -114,8 +114,8 @@ acpi_memory_get_resource(struct acpi_resource *resource, void *context)
         INIT_LIST_HEAD(&new->list);
         new->caching = address64.info.mem.caching;
         new->write_protect = address64.info.mem.write_protect;
-        new->start_addr = address64.minimum;
-        new->length = address64.address_length;
+        new->start_addr = address64.address.minimum;
+        new->length = address64.address.address_length;
         list_add_tail(&new->list, &mem_device->res_list);
 
         return AE_OK;
diff --git a/drivers/acpi/acpi_platform.c b/drivers/acpi/acpi_platform.c
index 6ba8beb6b9d2..1284138e42ab 100644
--- a/drivers/acpi/acpi_platform.c
+++ b/drivers/acpi/acpi_platform.c
@@ -45,7 +45,7 @@ struct platform_device *acpi_create_platform_device(struct acpi_device *adev)
         struct platform_device *pdev = NULL;
         struct acpi_device *acpi_parent;
         struct platform_device_info pdevinfo;
-        struct resource_list_entry *rentry;
+        struct resource_entry *rentry;
         struct list_head resource_list;
         struct resource *resources = NULL;
         int count;
@@ -71,7 +71,7 @@ struct platform_device *acpi_create_platform_device(struct acpi_device *adev)
                 }
                 count = 0;
                 list_for_each_entry(rentry, &resource_list, node)
-                        resources[count++] = rentry->res;
+                        resources[count++] = *rentry->res;
 
                 acpi_dev_free_resource_list(&resource_list);
         }
diff --git a/drivers/acpi/acpica/acapps.h b/drivers/acpi/acpica/acapps.h
index 3d2c88289da9..d863016565b5 100644
--- a/drivers/acpi/acpica/acapps.h
+++ b/drivers/acpi/acpica/acapps.h
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -47,7 +47,7 @@
 /* Common info for tool signons */
 
 #define ACPICA_NAME                 "Intel ACPI Component Architecture"
-#define ACPICA_COPYRIGHT            "Copyright (c) 2000 - 2014 Intel Corporation"
+#define ACPICA_COPYRIGHT            "Copyright (c) 2000 - 2015 Intel Corporation"
 
 #if ACPI_MACHINE_WIDTH == 64
 #define ACPI_WIDTH          "-64"
diff --git a/drivers/acpi/acpica/accommon.h b/drivers/acpi/acpica/accommon.h
index 6f1c616910ac..853aa2dbdb61 100644
--- a/drivers/acpi/acpica/accommon.h
+++ b/drivers/acpi/acpica/accommon.h
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/acdebug.h b/drivers/acpi/acpica/acdebug.h
index 1d026ff1683f..4169bb87a996 100644
--- a/drivers/acpi/acpica/acdebug.h
+++ b/drivers/acpi/acpica/acdebug.h
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/acdispat.h b/drivers/acpi/acpica/acdispat.h
index d3e2cc395d7f..408f04bcaab4 100644
--- a/drivers/acpi/acpica/acdispat.h
+++ b/drivers/acpi/acpica/acdispat.h
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/acevents.h b/drivers/acpi/acpica/acevents.h
index 7a7811a9fc26..228704b78657 100644
--- a/drivers/acpi/acpica/acevents.h
+++ b/drivers/acpi/acpica/acevents.h
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -143,8 +143,6 @@ acpi_ev_match_gpe_method(acpi_handle obj_handle,
 acpi_status
 acpi_ev_walk_gpe_list(acpi_gpe_callback gpe_walk_callback, void *context);
 
-u8 acpi_ev_valid_gpe_event(struct acpi_gpe_event_info *gpe_event_info);
-
 acpi_status
 acpi_ev_get_gpe_device(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
                        struct acpi_gpe_block_info *gpe_block, void *context);
diff --git a/drivers/acpi/acpica/acglobal.h b/drivers/acpi/acpica/acglobal.h
index 7f60582d0c8c..a165d25343e8 100644
--- a/drivers/acpi/acpica/acglobal.h
+++ b/drivers/acpi/acpica/acglobal.h
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/achware.h b/drivers/acpi/acpica/achware.h
index c318d3e27893..196a55244559 100644
--- a/drivers/acpi/acpica/achware.h
+++ b/drivers/acpi/acpica/achware.h
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/acinterp.h b/drivers/acpi/acpica/acinterp.h
index b01f71ce0523..1886bde54b5d 100644
--- a/drivers/acpi/acpica/acinterp.h
+++ b/drivers/acpi/acpica/acinterp.h
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/aclocal.h b/drivers/acpi/acpica/aclocal.h
index 680d23bbae7c..7add32e5d8c5 100644
--- a/drivers/acpi/acpica/aclocal.h
+++ b/drivers/acpi/acpica/aclocal.h
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/acmacros.h b/drivers/acpi/acpica/acmacros.h
index 4bceb11c7380..cf607fe69dbd 100644
--- a/drivers/acpi/acpica/acmacros.h
+++ b/drivers/acpi/acpica/acmacros.h
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/acnamesp.h b/drivers/acpi/acpica/acnamesp.h
index ee1c040f321c..952fbe0b7231 100644
--- a/drivers/acpi/acpica/acnamesp.h
+++ b/drivers/acpi/acpica/acnamesp.h
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/acobject.h b/drivers/acpi/acpica/acobject.h
index 8abb393dafab..3e9720e1f34f 100644
--- a/drivers/acpi/acpica/acobject.h
+++ b/drivers/acpi/acpica/acobject.h
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/acopcode.h b/drivers/acpi/acpica/acopcode.h
index dda0e6affcf1..a5f17de45ac6 100644
--- a/drivers/acpi/acpica/acopcode.h
+++ b/drivers/acpi/acpica/acopcode.h
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/acparser.h b/drivers/acpi/acpica/acparser.h
index 6168b85463ed..74a390c6db16 100644
--- a/drivers/acpi/acpica/acparser.h
+++ b/drivers/acpi/acpica/acparser.h
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/acpredef.h b/drivers/acpi/acpica/acpredef.h
index bd3908d26c4f..a972d11c97c9 100644
--- a/drivers/acpi/acpica/acpredef.h
+++ b/drivers/acpi/acpica/acpredef.h
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/acresrc.h b/drivers/acpi/acpica/acresrc.h
index 4b008e8884a1..efc4c7124ccc 100644
--- a/drivers/acpi/acpica/acresrc.h
+++ b/drivers/acpi/acpica/acresrc.h
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/acstruct.h b/drivers/acpi/acpica/acstruct.h
index cf7346110bd8..d14b547b7cd5 100644
--- a/drivers/acpi/acpica/acstruct.h
+++ b/drivers/acpi/acpica/acstruct.h
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/actables.h b/drivers/acpi/acpica/actables.h
index 1afe46e44dac..1c127a43017b 100644
--- a/drivers/acpi/acpica/actables.h
+++ b/drivers/acpi/acpica/actables.h
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/acutils.h b/drivers/acpi/acpica/acutils.h
index 486d342e74b6..c2f03e8774ad 100644
--- a/drivers/acpi/acpica/acutils.h
+++ b/drivers/acpi/acpica/acutils.h
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/amlcode.h b/drivers/acpi/acpica/amlcode.h
index 5908ccec6aea..3a95068fc119 100644
--- a/drivers/acpi/acpica/amlcode.h
+++ b/drivers/acpi/acpica/amlcode.h
@@ -7,7 +7,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/amlresrc.h b/drivers/acpi/acpica/amlresrc.h
index 3a0beeb86ba5..ee0cdd60b93d 100644
--- a/drivers/acpi/acpica/amlresrc.h
+++ b/drivers/acpi/acpica/amlresrc.h
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/dsargs.c b/drivers/acpi/acpica/dsargs.c
index 720b1cdda711..3e6989738e85 100644
--- a/drivers/acpi/acpica/dsargs.c
+++ b/drivers/acpi/acpica/dsargs.c
@@ -6,7 +6,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/dscontrol.c b/drivers/acpi/acpica/dscontrol.c
index 8daf9de82b73..39da9da62bbf 100644
--- a/drivers/acpi/acpica/dscontrol.c
+++ b/drivers/acpi/acpica/dscontrol.c
@@ -6,7 +6,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/dsfield.c b/drivers/acpi/acpica/dsfield.c
index c57666196672..43b40de90484 100644
--- a/drivers/acpi/acpica/dsfield.c
+++ b/drivers/acpi/acpica/dsfield.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/dsinit.c b/drivers/acpi/acpica/dsinit.c
index aee5e45f6d35..bbe74bcebbae 100644
--- a/drivers/acpi/acpica/dsinit.c
+++ b/drivers/acpi/acpica/dsinit.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/dsmethod.c b/drivers/acpi/acpica/dsmethod.c
index 3c7f7378b94d..d72565a3c646 100644
--- a/drivers/acpi/acpica/dsmethod.c
+++ b/drivers/acpi/acpica/dsmethod.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/dsmthdat.c b/drivers/acpi/acpica/dsmthdat.c
index b67522df01ac..2e4c42b377ec 100644
--- a/drivers/acpi/acpica/dsmthdat.c
+++ b/drivers/acpi/acpica/dsmthdat.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/dsobject.c b/drivers/acpi/acpica/dsobject.c
index a1e7e6b6fcf7..8a7b07b6adc8 100644
--- a/drivers/acpi/acpica/dsobject.c
+++ b/drivers/acpi/acpica/dsobject.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/dsopcode.c b/drivers/acpi/acpica/dsopcode.c
index 6c0759c0db47..77244182ff02 100644
--- a/drivers/acpi/acpica/dsopcode.c
+++ b/drivers/acpi/acpica/dsopcode.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/dsutils.c b/drivers/acpi/acpica/dsutils.c
index 9f74795e2268..e5ff89bcb3f5 100644
--- a/drivers/acpi/acpica/dsutils.c
+++ b/drivers/acpi/acpica/dsutils.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/dswexec.c b/drivers/acpi/acpica/dswexec.c
index f7f5107e754d..df54d46225cd 100644
--- a/drivers/acpi/acpica/dswexec.c
+++ b/drivers/acpi/acpica/dswexec.c
@@ -6,7 +6,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/dswload.c b/drivers/acpi/acpica/dswload.c
index 15623da26200..843942fb4be5 100644
--- a/drivers/acpi/acpica/dswload.c
+++ b/drivers/acpi/acpica/dswload.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/dswload2.c b/drivers/acpi/acpica/dswload2.c
index 2ac28d297305..fcaa30c611fb 100644
--- a/drivers/acpi/acpica/dswload2.c
+++ b/drivers/acpi/acpica/dswload2.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/dswscope.c b/drivers/acpi/acpica/dswscope.c
index 9d6e2c1de1f8..43b3ea40c0b6 100644
--- a/drivers/acpi/acpica/dswscope.c
+++ b/drivers/acpi/acpica/dswscope.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/dswstate.c b/drivers/acpi/acpica/dswstate.c
index 24f7d5ea678a..89ac2022465e 100644
--- a/drivers/acpi/acpica/dswstate.c
+++ b/drivers/acpi/acpica/dswstate.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/evevent.c b/drivers/acpi/acpica/evevent.c
index c7bffff9ed32..bf6873f95e72 100644
--- a/drivers/acpi/acpica/evevent.c
+++ b/drivers/acpi/acpica/evevent.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/evglock.c b/drivers/acpi/acpica/evglock.c
index 3393a73ca0d6..b78dc7c6d5d7 100644
--- a/drivers/acpi/acpica/evglock.c
+++ b/drivers/acpi/acpica/evglock.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/evgpe.c b/drivers/acpi/acpica/evgpe.c
index aa70154cf4fa..5ed064e8673c 100644
--- a/drivers/acpi/acpica/evgpe.c
+++ b/drivers/acpi/acpica/evgpe.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -114,17 +114,6 @@ acpi_status acpi_ev_enable_gpe(struct acpi_gpe_event_info *gpe_event_info)
 
         ACPI_FUNCTION_TRACE(ev_enable_gpe);
 
-        /*
-         * We will only allow a GPE to be enabled if it has either an associated
-         * method (_Lxx/_Exx) or a handler, or is using the implicit notify
-         * feature. Otherwise, the GPE will be immediately disabled by
-         * acpi_ev_gpe_dispatch the first time it fires.
-         */
-        if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
-            ACPI_GPE_DISPATCH_NONE) {
-                return_ACPI_STATUS(AE_NO_HANDLER);
-        }
-
         /* Clear the GPE (of stale events) */
 
         status = acpi_hw_clear_gpe(gpe_event_info);
@@ -339,7 +328,11 @@ u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info *gpe_xrupt_list)
 {
         acpi_status status;
         struct acpi_gpe_block_info *gpe_block;
+        struct acpi_namespace_node *gpe_device;
         struct acpi_gpe_register_info *gpe_register_info;
+        struct acpi_gpe_event_info *gpe_event_info;
+        u32 gpe_number;
+        struct acpi_gpe_handler_info *gpe_handler_info;
         u32 int_status = ACPI_INTERRUPT_NOT_HANDLED;
         u8 enabled_status_byte;
         u32 status_reg;
@@ -367,6 +360,8 @@ u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info *gpe_xrupt_list)
 
         gpe_block = gpe_xrupt_list->gpe_block_list_head;
         while (gpe_block) {
+                gpe_device = gpe_block->node;
+
                 /*
                  * Read all of the 8-bit GPE status and enable registers in this GPE
                  * block, saving all of them. Find all currently active GP events.
@@ -442,16 +437,68 @@ u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info *gpe_xrupt_list)
 
                                 /* Examine one GPE bit */
 
+                                gpe_event_info =
+                                    &gpe_block->
+                                    event_info[((acpi_size) i *
+                                                ACPI_GPE_REGISTER_WIDTH) + j];
+                                gpe_number =
+                                    j + gpe_register_info->base_gpe_number;
+
                                 if (enabled_status_byte & (1 << j)) {
-                                        /*
-                                         * Found an active GPE. Dispatch the event to a handler
-                                         * or method.
-                                         */
-                                        int_status |=
-                                            acpi_ev_gpe_dispatch(gpe_block->
-                                                                 node,
-                                                                 &gpe_block->
-                                                                 event_info[((acpi_size) i * ACPI_GPE_REGISTER_WIDTH) + j], j + gpe_register_info->base_gpe_number);
+
+                                        /* Invoke global event handler if present */
+
+                                        acpi_gpe_count++;
+                                        if (acpi_gbl_global_event_handler) {
+                                                acpi_gbl_global_event_handler
+                                                    (ACPI_EVENT_TYPE_GPE,
+                                                     gpe_device, gpe_number,
+                                                     acpi_gbl_global_event_handler_context);
+                                        }
+
+                                        /* Found an active GPE */
+
+                                        if (ACPI_GPE_DISPATCH_TYPE
+                                            (gpe_event_info->flags) ==
+                                            ACPI_GPE_DISPATCH_RAW_HANDLER) {
+
+                                                /* Dispatch the event to a raw handler */
+
+                                                gpe_handler_info =
+                                                    gpe_event_info->dispatch.
+                                                    handler;
+
+                                                /*
+                                                 * There is no protection around the namespace node
+                                                 * and the GPE handler to ensure a safe destruction
+                                                 * because:
+                                                 * 1. The namespace node is expected to always
+                                                 *    exist after loading a table.
+                                                 * 2. The GPE handler is expected to be flushed by
+                                                 *    acpi_os_wait_events_complete() before the
+                                                 *    destruction.
+                                                 */
+                                                acpi_os_release_lock
+                                                    (acpi_gbl_gpe_lock, flags);
+                                                int_status |=
+                                                    gpe_handler_info->
+                                                    address(gpe_device,
+                                                            gpe_number,
+                                                            gpe_handler_info->
+                                                            context);
+                                                flags =
+                                                    acpi_os_acquire_lock
+                                                    (acpi_gbl_gpe_lock);
+                                        } else {
+                                                /*
+                                                 * Dispatch the event to a standard handler or
+                                                 * method.
+                                                 */
+                                                int_status |=
+                                                    acpi_ev_gpe_dispatch
+                                                    (gpe_device, gpe_event_info,
+                                                     gpe_number);
+                                        }
                                 }
                         }
                 }
@@ -484,52 +531,15 @@ unlock_and_exit:
 static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context)
 {
         struct acpi_gpe_event_info *gpe_event_info = context;
-        acpi_status status;
-        struct acpi_gpe_event_info *local_gpe_event_info;
+        acpi_status status = AE_OK;
         struct acpi_evaluate_info *info;
         struct acpi_gpe_notify_info *notify;
 
         ACPI_FUNCTION_TRACE(ev_asynch_execute_gpe_method);
 
-        /* Allocate a local GPE block */
-
-        local_gpe_event_info =
-            ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_event_info));
-        if (!local_gpe_event_info) {
-                ACPI_EXCEPTION((AE_INFO, AE_NO_MEMORY, "while handling a GPE"));
-                return_VOID;
-        }
-
-        status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
-        if (ACPI_FAILURE(status)) {
-                ACPI_FREE(local_gpe_event_info);
-                return_VOID;
-        }
-
-        /* Must revalidate the gpe_number/gpe_block */
-
-        if (!acpi_ev_valid_gpe_event(gpe_event_info)) {
-                status = acpi_ut_release_mutex(ACPI_MTX_EVENTS);
-                ACPI_FREE(local_gpe_event_info);
-                return_VOID;
-        }
-
-        /*
-         * Take a snapshot of the GPE info for this level - we copy the info to
-         * prevent a race condition with remove_handler/remove_block.
-         */
-        ACPI_MEMCPY(local_gpe_event_info, gpe_event_info,
-                    sizeof(struct acpi_gpe_event_info));
-
-        status = acpi_ut_release_mutex(ACPI_MTX_EVENTS);
-        if (ACPI_FAILURE(status)) {
-                ACPI_FREE(local_gpe_event_info);
-                return_VOID;
-        }
-
         /* Do the correct dispatch - normal method or implicit notify */
 
-        switch (local_gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) {
+        switch (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags)) {
         case ACPI_GPE_DISPATCH_NOTIFY:
                 /*
                  * Implicit notify.
@@ -542,7 +552,7 @@ static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context)
                  * June 2012: Expand implicit notify mechanism to support
                  * notifies on multiple device objects.
                  */
-                notify = local_gpe_event_info->dispatch.notify_list;
+                notify = gpe_event_info->dispatch.notify_list;
                 while (ACPI_SUCCESS(status) && notify) {
                         status =
                             acpi_ev_queue_notify_request(notify->device_node,
@@ -566,7 +576,7 @@ static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context)
                          * _Lxx/_Exx control method that corresponds to this GPE
                          */
                         info->prefix_node =
-                            local_gpe_event_info->dispatch.method_node;
+                            gpe_event_info->dispatch.method_node;
                         info->flags = ACPI_IGNORE_RETURN_VALUE;
 
                         status = acpi_ns_evaluate(info);
@@ -576,25 +586,27 @@ static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context)
                 if (ACPI_FAILURE(status)) {
                         ACPI_EXCEPTION((AE_INFO, status,
                                         "while evaluating GPE method [%4.4s]",
-                                        acpi_ut_get_node_name
-                                        (local_gpe_event_info->dispatch.
-                                         method_node)));
+                                        acpi_ut_get_node_name(gpe_event_info->
+                                                              dispatch.
+                                                              method_node)));
                 }
                 break;
 
         default:
 
-                return_VOID;    /* Should never happen */
+                goto error_exit;        /* Should never happen */
         }
 
         /* Defer enabling of GPE until all notify handlers are done */
 
         status = acpi_os_execute(OSL_NOTIFY_HANDLER,
-                                 acpi_ev_asynch_enable_gpe,
-                                 local_gpe_event_info);
-        if (ACPI_FAILURE(status)) {
-                ACPI_FREE(local_gpe_event_info);
+                                 acpi_ev_asynch_enable_gpe, gpe_event_info);
+        if (ACPI_SUCCESS(status)) {
+                return_VOID;
         }
+
+error_exit:
+        acpi_ev_asynch_enable_gpe(gpe_event_info);
         return_VOID;
 }
 
@@ -622,7 +634,6 @@ static void ACPI_SYSTEM_XFACE acpi_ev_asynch_enable_gpe(void *context)
         (void)acpi_ev_finish_gpe(gpe_event_info);
         acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
 
-        ACPI_FREE(gpe_event_info);
         return;
 }
 
@@ -692,15 +703,6 @@ acpi_ev_gpe_dispatch(struct acpi_namespace_node *gpe_device,
 
         ACPI_FUNCTION_TRACE(ev_gpe_dispatch);
 
-        /* Invoke global event handler if present */
-
-        acpi_gpe_count++;
-        if (acpi_gbl_global_event_handler) {
-                acpi_gbl_global_event_handler(ACPI_EVENT_TYPE_GPE, gpe_device,
-                                              gpe_number,
-                                              acpi_gbl_global_event_handler_context);
-        }
-
         /*
          * Always disable the GPE so that it does not keep firing before
          * any asynchronous activity completes (either from the execution
@@ -741,7 +743,7 @@ acpi_ev_gpe_dispatch(struct acpi_namespace_node *gpe_device,
          * If there is neither a handler nor a method, leave the GPE
          * disabled.
          */
-        switch (gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) {
+        switch (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags)) {
         case ACPI_GPE_DISPATCH_HANDLER:
 
                 /* Invoke the installed handler (at interrupt level) */
diff --git a/drivers/acpi/acpica/evgpeblk.c b/drivers/acpi/acpica/evgpeblk.c
index d86699eea33c..e0f24c504513 100644
--- a/drivers/acpi/acpica/evgpeblk.c
+++ b/drivers/acpi/acpica/evgpeblk.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -474,10 +474,12 @@ acpi_ev_initialize_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
                          * Ignore GPEs that have no corresponding _Lxx/_Exx method
                          * and GPEs that are used to wake the system
                          */
-                        if (((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
+                        if ((ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
                              ACPI_GPE_DISPATCH_NONE)
-                            || ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK)
-                                == ACPI_GPE_DISPATCH_HANDLER)
+                            || (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
+                                ACPI_GPE_DISPATCH_HANDLER)
+                            || (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
+                                ACPI_GPE_DISPATCH_RAW_HANDLER)
                             || (gpe_event_info->flags & ACPI_GPE_CAN_WAKE)) {
                                 continue;
                         }
diff --git a/drivers/acpi/acpica/evgpeinit.c b/drivers/acpi/acpica/evgpeinit.c
index 7be928379879..8840296d5b20 100644
--- a/drivers/acpi/acpica/evgpeinit.c
+++ b/drivers/acpi/acpica/evgpeinit.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -401,15 +401,17 @@ acpi_ev_match_gpe_method(acpi_handle obj_handle,
                 return_ACPI_STATUS(AE_OK);
         }
 
-        if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
-            ACPI_GPE_DISPATCH_HANDLER) {
+        if ((ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
+             ACPI_GPE_DISPATCH_HANDLER) ||
+            (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
+             ACPI_GPE_DISPATCH_RAW_HANDLER)) {
 
                 /* If there is already a handler, ignore this GPE method */
 
                 return_ACPI_STATUS(AE_OK);
         }
 
-        if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
+        if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
             ACPI_GPE_DISPATCH_METHOD) {
                 /*
                  * If there is already a method, ignore this method. But check
diff --git a/drivers/acpi/acpica/evgpeutil.c b/drivers/acpi/acpica/evgpeutil.c
index 17e4bbfdb096..3a958f3612fe 100644
--- a/drivers/acpi/acpica/evgpeutil.c
+++ b/drivers/acpi/acpica/evgpeutil.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -108,53 +108,6 @@ unlock_and_exit:
 
 /*******************************************************************************
  *
- * FUNCTION:    acpi_ev_valid_gpe_event
- *
- * PARAMETERS:  gpe_event_info              - Info for this GPE
- *
- * RETURN:      TRUE if the gpe_event is valid
- *
- * DESCRIPTION: Validate a GPE event. DO NOT CALL FROM INTERRUPT LEVEL.
- *              Should be called only when the GPE lists are semaphore locked
- *              and not subject to change.
- *
- ******************************************************************************/
-
-u8 acpi_ev_valid_gpe_event(struct acpi_gpe_event_info *gpe_event_info)
-{
-        struct acpi_gpe_xrupt_info *gpe_xrupt_block;
-        struct acpi_gpe_block_info *gpe_block;
-
-        ACPI_FUNCTION_ENTRY();
-
-        /* No need for spin lock since we are not changing any list elements */
-
-        /* Walk the GPE interrupt levels */
-
-        gpe_xrupt_block = acpi_gbl_gpe_xrupt_list_head;
-        while (gpe_xrupt_block) {
-                gpe_block = gpe_xrupt_block->gpe_block_list_head;
-
-                /* Walk the GPE blocks on this interrupt level */
-
-                while (gpe_block) {
-                        if ((&gpe_block->event_info[0] <= gpe_event_info) &&
-                            (&gpe_block->event_info[gpe_block->gpe_count] >
-                             gpe_event_info)) {
-                                return (TRUE);
-                        }
-
-                        gpe_block = gpe_block->next;
-                }
-
-                gpe_xrupt_block = gpe_xrupt_block->next;
-        }
-
-        return (FALSE);
-}
-
-/*******************************************************************************
- *
  * FUNCTION:    acpi_ev_get_gpe_device
  *
  * PARAMETERS:  GPE_WALK_CALLBACK
@@ -371,8 +324,10 @@ acpi_ev_delete_gpe_handlers(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
                                                                  ACPI_GPE_REGISTER_WIDTH)
                                                                 + j];
 
-                        if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
-                            ACPI_GPE_DISPATCH_HANDLER) {
+                        if ((ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
+                             ACPI_GPE_DISPATCH_HANDLER) ||
+                            (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
+                             ACPI_GPE_DISPATCH_RAW_HANDLER)) {
 
                                 /* Delete an installed handler block */
 
@@ -380,10 +335,8 @@ acpi_ev_delete_gpe_handlers(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
                                 gpe_event_info->dispatch.handler = NULL;
                                 gpe_event_info->flags &=
                                     ~ACPI_GPE_DISPATCH_MASK;
-                        } else
-                            if ((gpe_event_info->
-                                 flags & ACPI_GPE_DISPATCH_MASK) ==
-                                ACPI_GPE_DISPATCH_NOTIFY) {
+                        } else if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags)
+                                   == ACPI_GPE_DISPATCH_NOTIFY) {
 
                                 /* Delete the implicit notification device list */
 
diff --git a/drivers/acpi/acpica/evhandler.c b/drivers/acpi/acpica/evhandler.c
index 78ac29351c9e..74e8595f5a2b 100644
--- a/drivers/acpi/acpica/evhandler.c
+++ b/drivers/acpi/acpica/evhandler.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/evmisc.c b/drivers/acpi/acpica/evmisc.c
index 24ea3424981b..f7c9dfe7b990 100644
--- a/drivers/acpi/acpica/evmisc.c
+++ b/drivers/acpi/acpica/evmisc.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/evregion.c b/drivers/acpi/acpica/evregion.c
index 8eb8575e8c16..9abace3401f9 100644
--- a/drivers/acpi/acpica/evregion.c
+++ b/drivers/acpi/acpica/evregion.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/evrgnini.c b/drivers/acpi/acpica/evrgnini.c
index 1b148a440d67..da323390bb70 100644
--- a/drivers/acpi/acpica/evrgnini.c
+++ b/drivers/acpi/acpica/evrgnini.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/evsci.c b/drivers/acpi/acpica/evsci.c
index 29630e303829..0366703d2970 100644
--- a/drivers/acpi/acpica/evsci.c
+++ b/drivers/acpi/acpica/evsci.c
@@ -6,7 +6,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/evxface.c b/drivers/acpi/acpica/evxface.c
index 55a58f3ec8df..81f2d9e87fad 100644
--- a/drivers/acpi/acpica/evxface.c
+++ b/drivers/acpi/acpica/evxface.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -51,6 +51,16 @@
 
 #define _COMPONENT          ACPI_EVENTS
 ACPI_MODULE_NAME("evxface")
+#if (!ACPI_REDUCED_HARDWARE)
+/* Local prototypes */
+static acpi_status
+acpi_ev_install_gpe_handler(acpi_handle gpe_device,
+                            u32 gpe_number,
+                            u32 type,
+                            u8 is_raw_handler,
+                            acpi_gpe_handler address, void *context);
+
+#endif
 
 
 /*******************************************************************************
@@ -76,6 +86,7 @@ ACPI_MODULE_NAME("evxface")
  *              handlers.
  *
  ******************************************************************************/
+
 acpi_status
 acpi_install_notify_handler(acpi_handle device,
                             u32 handler_type,
@@ -717,32 +728,37 @@ ACPI_EXPORT_SYMBOL(acpi_remove_fixed_event_handler)
 
 /*******************************************************************************
  *
- * FUNCTION:    acpi_install_gpe_handler
+ * FUNCTION:    acpi_ev_install_gpe_handler
  *
  * PARAMETERS:  gpe_device      - Namespace node for the GPE (NULL for FADT
  *                                defined GPEs)
  *              gpe_number      - The GPE number within the GPE block
  *              type            - Whether this GPE should be treated as an
  *                                edge- or level-triggered interrupt.
+ *              is_raw_handler  - Whether this GPE should be handled using
+ *                                the special GPE handler mode.
  *              address         - Address of the handler
  *              context         - Value passed to the handler on each GPE
  *
  * RETURN:      Status
  *
- * DESCRIPTION: Install a handler for a General Purpose Event.
+ * DESCRIPTION: Internal function to install a handler for a General Purpose
+ *              Event.
  *
  ******************************************************************************/
-acpi_status
-acpi_install_gpe_handler(acpi_handle gpe_device,
-                         u32 gpe_number,
-                         u32 type, acpi_gpe_handler address, void *context)
+static acpi_status
+acpi_ev_install_gpe_handler(acpi_handle gpe_device,
+                            u32 gpe_number,
+                            u32 type,
+                            u8 is_raw_handler,
+                            acpi_gpe_handler address, void *context)
 {
         struct acpi_gpe_event_info *gpe_event_info;
         struct acpi_gpe_handler_info *handler;
         acpi_status status;
         acpi_cpu_flags flags;
 
-        ACPI_FUNCTION_TRACE(acpi_install_gpe_handler);
+        ACPI_FUNCTION_TRACE(ev_install_gpe_handler);
 
         /* Parameter validation */
 
@@ -775,8 +791,10 @@ acpi_install_gpe_handler(acpi_handle gpe_device,
 
         /* Make sure that there isn't a handler there already */
 
-        if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
-            ACPI_GPE_DISPATCH_HANDLER) {
+        if ((ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
+             ACPI_GPE_DISPATCH_HANDLER) ||
+            (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
+             ACPI_GPE_DISPATCH_RAW_HANDLER)) {
                 status = AE_ALREADY_EXISTS;
                 goto free_and_exit;
         }
@@ -793,9 +811,10 @@ acpi_install_gpe_handler(acpi_handle gpe_device,
          * automatically during initialization, in which case it has to be
          * disabled now to avoid spurious execution of the handler.
          */
-        if (((handler->original_flags & ACPI_GPE_DISPATCH_METHOD) ||
-             (handler->original_flags & ACPI_GPE_DISPATCH_NOTIFY)) &&
-            gpe_event_info->runtime_count) {
+        if (((ACPI_GPE_DISPATCH_TYPE(handler->original_flags) ==
+              ACPI_GPE_DISPATCH_METHOD) ||
+             (ACPI_GPE_DISPATCH_TYPE(handler->original_flags) ==
+              ACPI_GPE_DISPATCH_NOTIFY)) && gpe_event_info->runtime_count) {
                 handler->originally_enabled = TRUE;
                 (void)acpi_ev_remove_gpe_reference(gpe_event_info);
 
@@ -816,7 +835,10 @@ acpi_install_gpe_handler(acpi_handle gpe_device,
 
         gpe_event_info->flags &=
             ~(ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK);
-        gpe_event_info->flags |= (u8)(type | ACPI_GPE_DISPATCH_HANDLER);
+        gpe_event_info->flags |=
+            (u8)(type |
+                 (is_raw_handler ? ACPI_GPE_DISPATCH_RAW_HANDLER :
+                  ACPI_GPE_DISPATCH_HANDLER));
 
         acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
 
@@ -830,10 +852,78 @@ free_and_exit:
         goto unlock_and_exit;
 }
 
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_install_gpe_handler
+ *
+ * PARAMETERS:  gpe_device      - Namespace node for the GPE (NULL for FADT
+ *                                defined GPEs)
+ *              gpe_number      - The GPE number within the GPE block
+ *              type            - Whether this GPE should be treated as an
+ *                                edge- or level-triggered interrupt.
+ *              address         - Address of the handler
+ *              context         - Value passed to the handler on each GPE
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Install a handler for a General Purpose Event.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_install_gpe_handler(acpi_handle gpe_device,
+                         u32 gpe_number,
+                         u32 type, acpi_gpe_handler address, void *context)
+{
+        acpi_status status;
+
+        ACPI_FUNCTION_TRACE(acpi_install_gpe_handler);
+
+        status =
+            acpi_ev_install_gpe_handler(gpe_device, gpe_number, type, FALSE,
+                                        address, context);
+
+        return_ACPI_STATUS(status);
+}
+
 ACPI_EXPORT_SYMBOL(acpi_install_gpe_handler)
 
 /*******************************************************************************
  *
+ * FUNCTION:    acpi_install_gpe_raw_handler
+ *
+ * PARAMETERS:  gpe_device      - Namespace node for the GPE (NULL for FADT
+ *                                defined GPEs)
+ *              gpe_number      - The GPE number within the GPE block
+ *              type            - Whether this GPE should be treated as an
+ *                                edge- or level-triggered interrupt.
+ *              address         - Address of the handler
+ *              context         - Value passed to the handler on each GPE
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Install a handler for a General Purpose Event.
+ *
+ ******************************************************************************/
+acpi_status
+acpi_install_gpe_raw_handler(acpi_handle gpe_device,
+                             u32 gpe_number,
+                             u32 type, acpi_gpe_handler address, void *context)
+{
+        acpi_status status;
+
+        ACPI_FUNCTION_TRACE(acpi_install_gpe_raw_handler);
+
+        status = acpi_ev_install_gpe_handler(gpe_device, gpe_number, type, TRUE,
+                                             address, context);
+
+        return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_install_gpe_raw_handler)
+
+/*******************************************************************************
+ *
  * FUNCTION:    acpi_remove_gpe_handler
  *
  * PARAMETERS:  gpe_device      - Namespace node for the GPE (NULL for FADT
@@ -880,8 +970,10 @@ acpi_remove_gpe_handler(acpi_handle gpe_device,
 
         /* Make sure that a handler is indeed installed */
 
-        if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) !=
-            ACPI_GPE_DISPATCH_HANDLER) {
+        if ((ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) !=
+             ACPI_GPE_DISPATCH_HANDLER) &&
+            (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) !=
+             ACPI_GPE_DISPATCH_RAW_HANDLER)) {
                 status = AE_NOT_EXIST;
                 goto unlock_and_exit;
         }
@@ -896,6 +988,7 @@ acpi_remove_gpe_handler(acpi_handle gpe_device,
         /* Remove the handler */
 
         handler = gpe_event_info->dispatch.handler;
+        gpe_event_info->dispatch.handler = NULL;
 
         /* Restore Method node (if any), set dispatch flags */
 
@@ -909,9 +1002,10 @@ acpi_remove_gpe_handler(acpi_handle gpe_device,
          * enabled, it should be enabled at this point to restore the
          * post-initialization configuration.
          */
-        if (((handler->original_flags & ACPI_GPE_DISPATCH_METHOD) ||
-             (handler->original_flags & ACPI_GPE_DISPATCH_NOTIFY)) &&
-            handler->originally_enabled) {
+        if (((ACPI_GPE_DISPATCH_TYPE(handler->original_flags) ==
+              ACPI_GPE_DISPATCH_METHOD) ||
+             (ACPI_GPE_DISPATCH_TYPE(handler->original_flags) ==
+              ACPI_GPE_DISPATCH_NOTIFY)) && handler->originally_enabled) {
                 (void)acpi_ev_add_gpe_reference(gpe_event_info);
         }
 
diff --git a/drivers/acpi/acpica/evxfevnt.c b/drivers/acpi/acpica/evxfevnt.c
index bb8cbf5961bf..df06a23c4197 100644
--- a/drivers/acpi/acpica/evxfevnt.c
+++ b/drivers/acpi/acpica/evxfevnt.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/evxfgpe.c b/drivers/acpi/acpica/evxfgpe.c
index e889a5304abd..70eb47e3d724 100644
--- a/drivers/acpi/acpica/evxfgpe.c
+++ b/drivers/acpi/acpica/evxfgpe.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -132,7 +132,7 @@ acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number)
          */
         gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
         if (gpe_event_info) {
-                if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) !=
+                if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) !=
                     ACPI_GPE_DISPATCH_NONE) {
                         status = acpi_ev_add_gpe_reference(gpe_event_info);
                 } else {
@@ -183,6 +183,77 @@ acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number)
 
 ACPI_EXPORT_SYMBOL(acpi_disable_gpe)
 
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_set_gpe
+ *
+ * PARAMETERS:  gpe_device          - Parent GPE Device. NULL for GPE0/GPE1
+ *              gpe_number          - GPE level within the GPE block
+ *              action              - ACPI_GPE_ENABLE or ACPI_GPE_DISABLE
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Enable or disable an individual GPE. This function bypasses
+ *              the reference count mechanism used in the acpi_enable_gpe(),
+ *              acpi_disable_gpe() interfaces.
+ *              This API is typically used by the GPE raw handler mode driver
+ *              to switch between the polling mode and the interrupt mode after
+ *              the driver has enabled the GPE.
+ *              The APIs should be invoked in this order:
+ *               acpi_enable_gpe()            <- Ensure the reference count > 0
+ *               acpi_set_gpe(ACPI_GPE_DISABLE) <- Enter polling mode
+ *               acpi_set_gpe(ACPI_GPE_ENABLE) <- Leave polling mode
+ *               acpi_disable_gpe()           <- Decrease the reference count
+ *
+ * Note: If a GPE is shared by 2 silicon components, then both the drivers
+ *       should support GPE polling mode or disabling the GPE for long period
+ *       for one driver may break the other. So use it with care since all
+ *       firmware _Lxx/_Exx handlers currently rely on the GPE interrupt mode.
+ *
+ ******************************************************************************/
+acpi_status acpi_set_gpe(acpi_handle gpe_device, u32 gpe_number, u8 action)
+{
+        struct acpi_gpe_event_info *gpe_event_info;
+        acpi_status status;
+        acpi_cpu_flags flags;
+
+        ACPI_FUNCTION_TRACE(acpi_set_gpe);
+
+        flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
+
+        /* Ensure that we have a valid GPE number */
+
+        gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
+        if (!gpe_event_info) {
+                status = AE_BAD_PARAMETER;
+                goto unlock_and_exit;
+        }
+
+        /* Perform the action */
+
+        switch (action) {
+        case ACPI_GPE_ENABLE:
+
+                status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_ENABLE);
+                break;
+
+        case ACPI_GPE_DISABLE:
+
+                status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_DISABLE);
+                break;
+
+        default:
+
+                status = AE_BAD_PARAMETER;
+                break;
+        }
+
+unlock_and_exit:
+        acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
+        return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_set_gpe)
 
 /*******************************************************************************
  *
@@ -313,7 +384,7 @@ acpi_setup_gpe_for_wake(acpi_handle wake_device,
          * known as an "implicit notify". Note: The GPE is assumed to be
          * level-triggered (for windows compatibility).
          */
-        if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
+        if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
             ACPI_GPE_DISPATCH_NONE) {
                 /*
                  * This is the first device for implicit notify on this GPE.
@@ -327,7 +398,7 @@ acpi_setup_gpe_for_wake(acpi_handle wake_device,
          * If we already have an implicit notify on this GPE, add
          * this device to the notify list.
          */
-        if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
+        if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
             ACPI_GPE_DISPATCH_NOTIFY) {
 
                 /* Ensure that the device is not already in the list */
@@ -530,6 +601,49 @@ unlock_and_exit:
 
 ACPI_EXPORT_SYMBOL(acpi_get_gpe_status)
 
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_finish_gpe
+ *
+ * PARAMETERS:  gpe_device          - Namespace node for the GPE Block
+ *                                    (NULL for FADT defined GPEs)
+ *              gpe_number          - GPE level within the GPE block
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Clear and conditionally reenable a GPE. This completes the GPE
+ *              processing. Intended for use by asynchronous host-installed
+ *              GPE handlers. The GPE is only reenabled if the enable_for_run bit
+ *              is set in the GPE info.
+ *
+ ******************************************************************************/
+acpi_status acpi_finish_gpe(acpi_handle gpe_device, u32 gpe_number)
+{
+        struct acpi_gpe_event_info *gpe_event_info;
+        acpi_status status;
+        acpi_cpu_flags flags;
+
+        ACPI_FUNCTION_TRACE(acpi_finish_gpe);
+
+        flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
+
+        /* Ensure that we have a valid GPE number */
+
+        gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
+        if (!gpe_event_info) {
+                status = AE_BAD_PARAMETER;
+                goto unlock_and_exit;
+        }
+
+        status = acpi_ev_finish_gpe(gpe_event_info);
+
+unlock_and_exit:
+        acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
+        return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_finish_gpe)
+
 /******************************************************************************
  *
  * FUNCTION:    acpi_disable_all_gpes
@@ -604,7 +718,6 @@ ACPI_EXPORT_SYMBOL(acpi_enable_all_runtime_gpes)
  *              all GPE blocks.
  *
  ******************************************************************************/
-
 acpi_status acpi_enable_all_wakeup_gpes(void)
 {
         acpi_status status;
diff --git a/drivers/acpi/acpica/evxfregn.c b/drivers/acpi/acpica/evxfregn.c
index 2d6f187939c7..f21afbab03f7 100644
--- a/drivers/acpi/acpica/evxfregn.c
+++ b/drivers/acpi/acpica/evxfregn.c
@@ -6,7 +6,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/exconfig.c b/drivers/acpi/acpica/exconfig.c
index 7d2949420db7..6e0df2b9d5a4 100644
--- a/drivers/acpi/acpica/exconfig.c
+++ b/drivers/acpi/acpica/exconfig.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/exconvrt.c b/drivers/acpi/acpica/exconvrt.c
index c545386fee96..89a976b4ccf2 100644
--- a/drivers/acpi/acpica/exconvrt.c
+++ b/drivers/acpi/acpica/exconvrt.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/excreate.c b/drivers/acpi/acpica/excreate.c
index 95d23dabcfbb..aaeea4840aaa 100644
--- a/drivers/acpi/acpica/excreate.c
+++ b/drivers/acpi/acpica/excreate.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/exdebug.c b/drivers/acpi/acpica/exdebug.c
index 6fbfad47518c..e67d0aca3fe6 100644
--- a/drivers/acpi/acpica/exdebug.c
+++ b/drivers/acpi/acpica/exdebug.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/exdump.c b/drivers/acpi/acpica/exdump.c
index 0f23c3f2678e..7c213b6b6472 100644
--- a/drivers/acpi/acpica/exdump.c
+++ b/drivers/acpi/acpica/exdump.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/exfield.c b/drivers/acpi/acpica/exfield.c
index b994845ed359..c161dd974f74 100644
--- a/drivers/acpi/acpica/exfield.c
+++ b/drivers/acpi/acpica/exfield.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/exfldio.c b/drivers/acpi/acpica/exfldio.c
index 1d1b27a96c5b..49479927e7f7 100644
--- a/drivers/acpi/acpica/exfldio.c
+++ b/drivers/acpi/acpica/exfldio.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/exmisc.c b/drivers/acpi/acpica/exmisc.c
index 2207e624f538..b56fc9d6f48e 100644
--- a/drivers/acpi/acpica/exmisc.c
+++ b/drivers/acpi/acpica/exmisc.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/exmutex.c b/drivers/acpi/acpica/exmutex.c
index b49ea2a95f4f..472030f2b5bb 100644
--- a/drivers/acpi/acpica/exmutex.c
+++ b/drivers/acpi/acpica/exmutex.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/exnames.c b/drivers/acpi/acpica/exnames.c
index dbb03b544e8c..453b00c30177 100644
--- a/drivers/acpi/acpica/exnames.c
+++ b/drivers/acpi/acpica/exnames.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/exoparg1.c b/drivers/acpi/acpica/exoparg1.c
index 1b8e94104407..77930683ab7d 100644
--- a/drivers/acpi/acpica/exoparg1.c
+++ b/drivers/acpi/acpica/exoparg1.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/exoparg2.c b/drivers/acpi/acpica/exoparg2.c
index 2ede656ee26a..fcc618aa2061 100644
--- a/drivers/acpi/acpica/exoparg2.c
+++ b/drivers/acpi/acpica/exoparg2.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/exoparg3.c b/drivers/acpi/acpica/exoparg3.c
index 363767cf01e5..b813fed95e56 100644
--- a/drivers/acpi/acpica/exoparg3.c
+++ b/drivers/acpi/acpica/exoparg3.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/exoparg6.c b/drivers/acpi/acpica/exoparg6.c
index 29e9e99f7fe3..c930edda3f65 100644
--- a/drivers/acpi/acpica/exoparg6.c
+++ b/drivers/acpi/acpica/exoparg6.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/exprep.c b/drivers/acpi/acpica/exprep.c
index 118e942005e5..4c2836dc825b 100644
--- a/drivers/acpi/acpica/exprep.c
+++ b/drivers/acpi/acpica/exprep.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/exregion.c b/drivers/acpi/acpica/exregion.c
index cd5288a257a9..0fe188e238ef 100644
--- a/drivers/acpi/acpica/exregion.c
+++ b/drivers/acpi/acpica/exregion.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/exresnte.c b/drivers/acpi/acpica/exresnte.c
index ab060261b43e..c7e3b929aa85 100644
--- a/drivers/acpi/acpica/exresnte.c
+++ b/drivers/acpi/acpica/exresnte.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/exresolv.c b/drivers/acpi/acpica/exresolv.c
index 3cde553bcbe1..b6b7f3af29e4 100644
--- a/drivers/acpi/acpica/exresolv.c
+++ b/drivers/acpi/acpica/exresolv.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/exresop.c b/drivers/acpi/acpica/exresop.c
index 3af8de3fcea4..d2964af9ad4d 100644
--- a/drivers/acpi/acpica/exresop.c
+++ b/drivers/acpi/acpica/exresop.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/exstore.c b/drivers/acpi/acpica/exstore.c
index daf49f7ea311..a7eee2400ce0 100644
--- a/drivers/acpi/acpica/exstore.c
+++ b/drivers/acpi/acpica/exstore.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/exstoren.c b/drivers/acpi/acpica/exstoren.c
index 04bd16c08f9e..3101607b4efe 100644
--- a/drivers/acpi/acpica/exstoren.c
+++ b/drivers/acpi/acpica/exstoren.c
@@ -6,7 +6,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/exstorob.c b/drivers/acpi/acpica/exstorob.c
index fd11018b0168..6fa3c8d8fc5f 100644
--- a/drivers/acpi/acpica/exstorob.c
+++ b/drivers/acpi/acpica/exstorob.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/exsystem.c b/drivers/acpi/acpica/exsystem.c
index f7da64123ed5..05450656fe3d 100644
--- a/drivers/acpi/acpica/exsystem.c
+++ b/drivers/acpi/acpica/exsystem.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/exutils.c b/drivers/acpi/acpica/exutils.c
index d9d72dff2a76..3f4225e95d93 100644
--- a/drivers/acpi/acpica/exutils.c
+++ b/drivers/acpi/acpica/exutils.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/hwacpi.c b/drivers/acpi/acpica/hwacpi.c
index 1e66d960fc11..e5c5949f9081 100644
--- a/drivers/acpi/acpica/hwacpi.c
+++ b/drivers/acpi/acpica/hwacpi.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/hwesleep.c b/drivers/acpi/acpica/hwesleep.c
index 858fdd6be598..e5599f610808 100644
--- a/drivers/acpi/acpica/hwesleep.c
+++ b/drivers/acpi/acpica/hwesleep.c
@@ -6,7 +6,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/hwgpe.c b/drivers/acpi/acpica/hwgpe.c
index 494027f5c067..84bc550f4f1d 100644
--- a/drivers/acpi/acpica/hwgpe.c
+++ b/drivers/acpi/acpica/hwgpe.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -54,6 +54,10 @@ acpi_hw_enable_wakeup_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
                                 struct acpi_gpe_block_info *gpe_block,
                                 void *context);
 
+static acpi_status
+acpi_hw_gpe_enable_write(u8 enable_mask,
+                         struct acpi_gpe_register_info *gpe_register_info);
+
 /******************************************************************************
  *
  * FUNCTION:    acpi_hw_get_gpe_register_bit
@@ -146,7 +150,7 @@ acpi_hw_low_set_gpe(struct acpi_gpe_event_info *gpe_event_info, u32 action)
 
         status = acpi_hw_write(enable_mask, &gpe_register_info->enable_address);
         if (ACPI_SUCCESS(status) && (action & ACPI_GPE_SAVE_MASK)) {
-                gpe_register_info->enable_mask = enable_mask;
+                gpe_register_info->enable_mask = (u8)enable_mask;
         }
         return (status);
 }
@@ -221,7 +225,7 @@ acpi_hw_get_gpe_status(struct acpi_gpe_event_info * gpe_event_info,
 
         /* GPE currently handled? */
 
-        if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) !=
+        if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) !=
             ACPI_GPE_DISPATCH_NONE) {
                 local_event_status |= ACPI_EVENT_FLAG_HAS_HANDLER;
         }
diff --git a/drivers/acpi/acpica/hwpci.c b/drivers/acpi/acpica/hwpci.c
index 6aade8e1d2a1..c5214dec4988 100644
--- a/drivers/acpi/acpica/hwpci.c
+++ b/drivers/acpi/acpica/hwpci.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/hwregs.c b/drivers/acpi/acpica/hwregs.c
index a4c34d2c556b..3cf77afd142c 100644
--- a/drivers/acpi/acpica/hwregs.c
+++ b/drivers/acpi/acpica/hwregs.c
@@ -6,7 +6,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/hwsleep.c b/drivers/acpi/acpica/hwsleep.c
index d590693eb54e..7d21cae6d602 100644
--- a/drivers/acpi/acpica/hwsleep.c
+++ b/drivers/acpi/acpica/hwsleep.c
@@ -6,7 +6,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/hwtimer.c b/drivers/acpi/acpica/hwtimer.c
index 76ab5c1a814e..675c709a300b 100644
--- a/drivers/acpi/acpica/hwtimer.c
+++ b/drivers/acpi/acpica/hwtimer.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/hwvalid.c b/drivers/acpi/acpica/hwvalid.c
index 6b919127cd9d..2bd33fe56cb3 100644
--- a/drivers/acpi/acpica/hwvalid.c
+++ b/drivers/acpi/acpica/hwvalid.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/hwxface.c b/drivers/acpi/acpica/hwxface.c
index 96d007df65ec..5f97468df8ff 100644
--- a/drivers/acpi/acpica/hwxface.c
+++ b/drivers/acpi/acpica/hwxface.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/hwxfsleep.c b/drivers/acpi/acpica/hwxfsleep.c
index 6921c7f3d208..3b3767698827 100644
--- a/drivers/acpi/acpica/hwxfsleep.c
+++ b/drivers/acpi/acpica/hwxfsleep.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/nsaccess.c b/drivers/acpi/acpica/nsaccess.c
index f1249e3463be..24fa19a76d70 100644
--- a/drivers/acpi/acpica/nsaccess.c
+++ b/drivers/acpi/acpica/nsaccess.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/nsalloc.c b/drivers/acpi/acpica/nsalloc.c
index 607eb9e5150d..e107f929d9cf 100644
--- a/drivers/acpi/acpica/nsalloc.c
+++ b/drivers/acpi/acpica/nsalloc.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/nsarguments.c b/drivers/acpi/acpica/nsarguments.c
index 80fcfc8c9c1b..5d347a71bd0b 100644
--- a/drivers/acpi/acpica/nsarguments.c
+++ b/drivers/acpi/acpica/nsarguments.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/nsconvert.c b/drivers/acpi/acpica/nsconvert.c
index b55642c4ee58..1a8b39c8d969 100644
--- a/drivers/acpi/acpica/nsconvert.c
+++ b/drivers/acpi/acpica/nsconvert.c
@@ -6,7 +6,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/nsdump.c b/drivers/acpi/acpica/nsdump.c
index 3d88ef4a3e0d..80f097eb7381 100644
--- a/drivers/acpi/acpica/nsdump.c
+++ b/drivers/acpi/acpica/nsdump.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/nsdumpdv.c b/drivers/acpi/acpica/nsdumpdv.c
index 42d37109aa5d..7dc367e6fe09 100644
--- a/drivers/acpi/acpica/nsdumpdv.c
+++ b/drivers/acpi/acpica/nsdumpdv.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/nseval.c b/drivers/acpi/acpica/nseval.c
index e634a05974db..7bcc68f57afa 100644
--- a/drivers/acpi/acpica/nseval.c
+++ b/drivers/acpi/acpica/nseval.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/nsinit.c b/drivers/acpi/acpica/nsinit.c
index a3fb7e4c0809..4a85c4517988 100644
--- a/drivers/acpi/acpica/nsinit.c
+++ b/drivers/acpi/acpica/nsinit.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/nsload.c b/drivers/acpi/acpica/nsload.c
index 7c9d0181f341..bd6cd4a81316 100644
--- a/drivers/acpi/acpica/nsload.c
+++ b/drivers/acpi/acpica/nsload.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/nsnames.c b/drivers/acpi/acpica/nsnames.c
index 7eee0a6f02f6..d293d9748036 100644
--- a/drivers/acpi/acpica/nsnames.c
+++ b/drivers/acpi/acpica/nsnames.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/nsobject.c b/drivers/acpi/acpica/nsobject.c
index a42ee9d6970d..677bc9330e64 100644
--- a/drivers/acpi/acpica/nsobject.c
+++ b/drivers/acpi/acpica/nsobject.c
@@ -6,7 +6,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/nsparse.c b/drivers/acpi/acpica/nsparse.c
index e83cff31754b..c95a119767b5 100644
--- a/drivers/acpi/acpica/nsparse.c
+++ b/drivers/acpi/acpica/nsparse.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/nspredef.c b/drivers/acpi/acpica/nspredef.c
index 392910ffbed9..0eb54315b4be 100644
--- a/drivers/acpi/acpica/nspredef.c
+++ b/drivers/acpi/acpica/nspredef.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/nsprepkg.c b/drivers/acpi/acpica/nsprepkg.c
index 1b13b921dda9..8b79958b7aca 100644
--- a/drivers/acpi/acpica/nsprepkg.c
+++ b/drivers/acpi/acpica/nsprepkg.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/nsrepair.c b/drivers/acpi/acpica/nsrepair.c
index 7e417aa5c91e..151fcd95ba84 100644
--- a/drivers/acpi/acpica/nsrepair.c
+++ b/drivers/acpi/acpica/nsrepair.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/nsrepair2.c b/drivers/acpi/acpica/nsrepair2.c
index b09e6bef72b8..c30672d23878 100644
--- a/drivers/acpi/acpica/nsrepair2.c
+++ b/drivers/acpi/acpica/nsrepair2.c
@@ -6,7 +6,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/nssearch.c b/drivers/acpi/acpica/nssearch.c
index af1cc42a8aa1..4a9d4a66016e 100644
--- a/drivers/acpi/acpica/nssearch.c
+++ b/drivers/acpi/acpica/nssearch.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/nsutils.c b/drivers/acpi/acpica/nsutils.c
index 4a5e3f5c0ff7..6ad02008c0c2 100644
--- a/drivers/acpi/acpica/nsutils.c
+++ b/drivers/acpi/acpica/nsutils.c
@@ -6,7 +6,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/nswalk.c b/drivers/acpi/acpica/nswalk.c
index 4758a1f2ce22..c68609a2bc1b 100644
--- a/drivers/acpi/acpica/nswalk.c
+++ b/drivers/acpi/acpica/nswalk.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/nsxfeval.c b/drivers/acpi/acpica/nsxfeval.c
index 4bd558bf10d2..b6030a2deee1 100644
--- a/drivers/acpi/acpica/nsxfeval.c
+++ b/drivers/acpi/acpica/nsxfeval.c
@@ -6,7 +6,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/nsxfname.c b/drivers/acpi/acpica/nsxfname.c
index 8c6c11ce9760..d66c326485d8 100644
--- a/drivers/acpi/acpica/nsxfname.c
+++ b/drivers/acpi/acpica/nsxfname.c
@@ -6,7 +6,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/nsxfobj.c b/drivers/acpi/acpica/nsxfobj.c
index dae9401be7a2..793383501f81 100644
--- a/drivers/acpi/acpica/nsxfobj.c
+++ b/drivers/acpi/acpica/nsxfobj.c
@@ -6,7 +6,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -53,50 +53,6 @@ ACPI_MODULE_NAME("nsxfobj")
 
 /*******************************************************************************
  *
- * FUNCTION:    acpi_get_id
- *
- * PARAMETERS:  Handle          - Handle of object whose id is desired
- *              ret_id          - Where the id will be placed
- *
- * RETURN:      Status
- *
- * DESCRIPTION: This routine returns the owner id associated with a handle
- *
- ******************************************************************************/
-acpi_status acpi_get_id(acpi_handle handle, acpi_owner_id * ret_id)
-{
-        struct acpi_namespace_node *node;
-        acpi_status status;
-
-        /* Parameter Validation */
-
-        if (!ret_id) {
-                return (AE_BAD_PARAMETER);
-        }
-
-        status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
-        if (ACPI_FAILURE(status)) {
-                return (status);
-        }
-
-        /* Convert and validate the handle */
-
-        node = acpi_ns_validate_handle(handle);
-        if (!node) {
-                (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
-                return (AE_BAD_PARAMETER);
-        }
-
-        *ret_id = node->owner_id;
-
-        status = acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
-        return (status);
-}
-
-ACPI_EXPORT_SYMBOL(acpi_get_id)
-
-/*******************************************************************************
- *
  * FUNCTION:    acpi_get_type
  *
  * PARAMETERS:  handle          - Handle of object whose type is desired
diff --git a/drivers/acpi/acpica/psargs.c b/drivers/acpi/acpica/psargs.c
index 314d314340ae..6d038770577b 100644
--- a/drivers/acpi/acpica/psargs.c
+++ b/drivers/acpi/acpica/psargs.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/psloop.c b/drivers/acpi/acpica/psloop.c
index b058e2390fdd..90437227d790 100644
--- a/drivers/acpi/acpica/psloop.c
+++ b/drivers/acpi/acpica/psloop.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/psobject.c b/drivers/acpi/acpica/psobject.c
index a6885077d59e..2f5ddd806c58 100644
--- a/drivers/acpi/acpica/psobject.c
+++ b/drivers/acpi/acpica/psobject.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/psopcode.c b/drivers/acpi/acpica/psopcode.c
index 1755d2ac5656..1af4a405e351 100644
--- a/drivers/acpi/acpica/psopcode.c
+++ b/drivers/acpi/acpica/psopcode.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/psopinfo.c b/drivers/acpi/acpica/psopinfo.c
index 0d8d37ffd04d..e18e7c47f482 100644
--- a/drivers/acpi/acpica/psopinfo.c
+++ b/drivers/acpi/acpica/psopinfo.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/psparse.c b/drivers/acpi/acpica/psparse.c
index 6d27b597394e..a555f7f7b9a2 100644
--- a/drivers/acpi/acpica/psparse.c
+++ b/drivers/acpi/acpica/psparse.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/psscope.c b/drivers/acpi/acpica/psscope.c
index 32d250feea21..9d669cc6cb62 100644
--- a/drivers/acpi/acpica/psscope.c
+++ b/drivers/acpi/acpica/psscope.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/pstree.c b/drivers/acpi/acpica/pstree.c
index 0b64181e7720..89984f30addc 100644
--- a/drivers/acpi/acpica/pstree.c
+++ b/drivers/acpi/acpica/pstree.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/psutils.c b/drivers/acpi/acpica/psutils.c
index 3cd48802eede..960505ab409a 100644
--- a/drivers/acpi/acpica/psutils.c
+++ b/drivers/acpi/acpica/psutils.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/pswalk.c b/drivers/acpi/acpica/pswalk.c
index 9cb07e1e76d9..ba5f69171288 100644
--- a/drivers/acpi/acpica/pswalk.c
+++ b/drivers/acpi/acpica/pswalk.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/psxface.c b/drivers/acpi/acpica/psxface.c
index e135acaa5e1c..841a5ea06094 100644
--- a/drivers/acpi/acpica/psxface.c
+++ b/drivers/acpi/acpica/psxface.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/rsaddr.c b/drivers/acpi/acpica/rsaddr.c
index 916fd095ff34..66d406e8fe36 100644
--- a/drivers/acpi/acpica/rsaddr.c
+++ b/drivers/acpi/acpica/rsaddr.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -74,7 +74,7 @@ struct acpi_rsconvert_info acpi_rs_convert_address16[5] = {
          * Address Translation Offset
          * Address Length
          */
-        {ACPI_RSC_MOVE16, ACPI_RS_OFFSET(data.address16.granularity),
+        {ACPI_RSC_MOVE16, ACPI_RS_OFFSET(data.address16.address.granularity),
          AML_OFFSET(address16.granularity),
          5},
 
@@ -112,7 +112,7 @@ struct acpi_rsconvert_info acpi_rs_convert_address32[5] = {
          * Address Translation Offset
          * Address Length
          */
-        {ACPI_RSC_MOVE32, ACPI_RS_OFFSET(data.address32.granularity),
+        {ACPI_RSC_MOVE32, ACPI_RS_OFFSET(data.address32.address.granularity),
          AML_OFFSET(address32.granularity),
          5},
 
@@ -150,7 +150,7 @@ struct acpi_rsconvert_info acpi_rs_convert_address64[5] = {
          * Address Translation Offset
          * Address Length
          */
-        {ACPI_RSC_MOVE64, ACPI_RS_OFFSET(data.address64.granularity),
+        {ACPI_RSC_MOVE64, ACPI_RS_OFFSET(data.address64.address.granularity),
          AML_OFFSET(address64.granularity),
          5},
 
@@ -194,7 +194,8 @@ struct acpi_rsconvert_info acpi_rs_convert_ext_address64[5] = {
          * Address Length
          * Type-Specific Attribute
          */
-        {ACPI_RSC_MOVE64, ACPI_RS_OFFSET(data.ext_address64.granularity),
+        {ACPI_RSC_MOVE64,
+         ACPI_RS_OFFSET(data.ext_address64.address.granularity),
          AML_OFFSET(ext_address64.granularity),
          6}
 };
diff --git a/drivers/acpi/acpica/rscalc.c b/drivers/acpi/acpica/rscalc.c
index 689556744b03..cb739a694931 100644
--- a/drivers/acpi/acpica/rscalc.c
+++ b/drivers/acpi/acpica/rscalc.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/rscreate.c b/drivers/acpi/acpica/rscreate.c
index 049d9c22a0f9..15434e4c9b34 100644
--- a/drivers/acpi/acpica/rscreate.c
+++ b/drivers/acpi/acpica/rscreate.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/rsdump.c b/drivers/acpi/acpica/rsdump.c
index c3c56b5a9788..1539394c8c52 100644
--- a/drivers/acpi/acpica/rsdump.c
+++ b/drivers/acpi/acpica/rsdump.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/rsdumpinfo.c b/drivers/acpi/acpica/rsdumpinfo.c
index 2f9332d5c973..b29d9ec63d1b 100644
--- a/drivers/acpi/acpica/rsdumpinfo.c
+++ b/drivers/acpi/acpica/rsdumpinfo.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -183,15 +183,15 @@ struct acpi_rsdump_info acpi_rs_dump_address16[8] = {
         {ACPI_RSD_TITLE, ACPI_RSD_TABLE_SIZE(acpi_rs_dump_address16),
          "16-Bit WORD Address Space", NULL},
         {ACPI_RSD_ADDRESS, 0, NULL, NULL},
-        {ACPI_RSD_UINT16, ACPI_RSD_OFFSET(address16.granularity), "Granularity",
-         NULL},
-        {ACPI_RSD_UINT16, ACPI_RSD_OFFSET(address16.minimum), "Address Minimum",
-         NULL},
-        {ACPI_RSD_UINT16, ACPI_RSD_OFFSET(address16.maximum), "Address Maximum",
-         NULL},
-        {ACPI_RSD_UINT16, ACPI_RSD_OFFSET(address16.translation_offset),
+        {ACPI_RSD_UINT16, ACPI_RSD_OFFSET(address16.address.granularity),
+         "Granularity", NULL},
+        {ACPI_RSD_UINT16, ACPI_RSD_OFFSET(address16.address.minimum),
+         "Address Minimum", NULL},
+        {ACPI_RSD_UINT16, ACPI_RSD_OFFSET(address16.address.maximum),
+         "Address Maximum", NULL},
+        {ACPI_RSD_UINT16, ACPI_RSD_OFFSET(address16.address.translation_offset),
          "Translation Offset", NULL},
-        {ACPI_RSD_UINT16, ACPI_RSD_OFFSET(address16.address_length),
+        {ACPI_RSD_UINT16, ACPI_RSD_OFFSET(address16.address.address_length),
          "Address Length", NULL},
         {ACPI_RSD_SOURCE, ACPI_RSD_OFFSET(address16.resource_source), NULL, NULL}
 };
@@ -200,15 +200,15 @@ struct acpi_rsdump_info acpi_rs_dump_address32[8] = {
         {ACPI_RSD_TITLE, ACPI_RSD_TABLE_SIZE(acpi_rs_dump_address32),
          "32-Bit DWORD Address Space", NULL},
         {ACPI_RSD_ADDRESS, 0, NULL, NULL},
-        {ACPI_RSD_UINT32, ACPI_RSD_OFFSET(address32.granularity), "Granularity",
-         NULL},
-        {ACPI_RSD_UINT32, ACPI_RSD_OFFSET(address32.minimum), "Address Minimum",
-         NULL},
-        {ACPI_RSD_UINT32, ACPI_RSD_OFFSET(address32.maximum), "Address Maximum",
-         NULL},
-        {ACPI_RSD_UINT32, ACPI_RSD_OFFSET(address32.translation_offset),
+        {ACPI_RSD_UINT32, ACPI_RSD_OFFSET(address32.address.granularity),
+         "Granularity", NULL},
+        {ACPI_RSD_UINT32, ACPI_RSD_OFFSET(address32.address.minimum),
+         "Address Minimum", NULL},
+        {ACPI_RSD_UINT32, ACPI_RSD_OFFSET(address32.address.maximum),
+         "Address Maximum", NULL},
+        {ACPI_RSD_UINT32, ACPI_RSD_OFFSET(address32.address.translation_offset),
          "Translation Offset", NULL},
-        {ACPI_RSD_UINT32, ACPI_RSD_OFFSET(address32.address_length),
+        {ACPI_RSD_UINT32, ACPI_RSD_OFFSET(address32.address.address_length),
          "Address Length", NULL},
         {ACPI_RSD_SOURCE, ACPI_RSD_OFFSET(address32.resource_source), NULL, NULL}
 };
@@ -217,15 +217,15 @@ struct acpi_rsdump_info acpi_rs_dump_address64[8] = {
         {ACPI_RSD_TITLE, ACPI_RSD_TABLE_SIZE(acpi_rs_dump_address64),
          "64-Bit QWORD Address Space", NULL},
         {ACPI_RSD_ADDRESS, 0, NULL, NULL},
-        {ACPI_RSD_UINT64, ACPI_RSD_OFFSET(address64.granularity), "Granularity",
-         NULL},
-        {ACPI_RSD_UINT64, ACPI_RSD_OFFSET(address64.minimum), "Address Minimum",
-         NULL},
-        {ACPI_RSD_UINT64, ACPI_RSD_OFFSET(address64.maximum), "Address Maximum",
-         NULL},
-        {ACPI_RSD_UINT64, ACPI_RSD_OFFSET(address64.translation_offset),
+        {ACPI_RSD_UINT64, ACPI_RSD_OFFSET(address64.address.granularity),
+         "Granularity", NULL},
+        {ACPI_RSD_UINT64, ACPI_RSD_OFFSET(address64.address.minimum),
+         "Address Minimum", NULL},
+        {ACPI_RSD_UINT64, ACPI_RSD_OFFSET(address64.address.maximum),
+         "Address Maximum", NULL},
+        {ACPI_RSD_UINT64, ACPI_RSD_OFFSET(address64.address.translation_offset),
          "Translation Offset", NULL},
-        {ACPI_RSD_UINT64, ACPI_RSD_OFFSET(address64.address_length),
+        {ACPI_RSD_UINT64, ACPI_RSD_OFFSET(address64.address.address_length),
          "Address Length", NULL},
         {ACPI_RSD_SOURCE, ACPI_RSD_OFFSET(address64.resource_source), NULL, NULL}
 };
@@ -234,15 +234,16 @@ struct acpi_rsdump_info acpi_rs_dump_ext_address64[8] = {
         {ACPI_RSD_TITLE, ACPI_RSD_TABLE_SIZE(acpi_rs_dump_ext_address64),
          "64-Bit Extended Address Space", NULL},
         {ACPI_RSD_ADDRESS, 0, NULL, NULL},
-        {ACPI_RSD_UINT64, ACPI_RSD_OFFSET(ext_address64.granularity),
+        {ACPI_RSD_UINT64, ACPI_RSD_OFFSET(ext_address64.address.granularity),
          "Granularity", NULL},
-        {ACPI_RSD_UINT64, ACPI_RSD_OFFSET(ext_address64.minimum),
+        {ACPI_RSD_UINT64, ACPI_RSD_OFFSET(ext_address64.address.minimum),
          "Address Minimum", NULL},
-        {ACPI_RSD_UINT64, ACPI_RSD_OFFSET(ext_address64.maximum),
+        {ACPI_RSD_UINT64, ACPI_RSD_OFFSET(ext_address64.address.maximum),
          "Address Maximum", NULL},
-        {ACPI_RSD_UINT64, ACPI_RSD_OFFSET(ext_address64.translation_offset),
+        {ACPI_RSD_UINT64,
+         ACPI_RSD_OFFSET(ext_address64.address.translation_offset),
          "Translation Offset", NULL},
-        {ACPI_RSD_UINT64, ACPI_RSD_OFFSET(ext_address64.address_length),
+        {ACPI_RSD_UINT64, ACPI_RSD_OFFSET(ext_address64.address.address_length),
          "Address Length", NULL},
         {ACPI_RSD_UINT64, ACPI_RSD_OFFSET(ext_address64.type_specific),
          "Type-Specific Attribute", NULL}
diff --git a/drivers/acpi/acpica/rsinfo.c b/drivers/acpi/acpica/rsinfo.c
index 9d3f8a9a24bd..edecfc675979 100644
--- a/drivers/acpi/acpica/rsinfo.c
+++ b/drivers/acpi/acpica/rsinfo.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/rsio.c b/drivers/acpi/acpica/rsio.c
index 19d64873290a..5adba018bab0 100644
--- a/drivers/acpi/acpica/rsio.c
+++ b/drivers/acpi/acpica/rsio.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/rsirq.c b/drivers/acpi/acpica/rsirq.c
index 3461f7db26df..07cfa70a475b 100644
--- a/drivers/acpi/acpica/rsirq.c
+++ b/drivers/acpi/acpica/rsirq.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/rslist.c b/drivers/acpi/acpica/rslist.c
index 77291293af64..50d5be2ee062 100644
--- a/drivers/acpi/acpica/rslist.c
+++ b/drivers/acpi/acpica/rslist.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/rsmemory.c b/drivers/acpi/acpica/rsmemory.c
index eab4483ff5f8..c6b80862030e 100644
--- a/drivers/acpi/acpica/rsmemory.c
+++ b/drivers/acpi/acpica/rsmemory.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/rsmisc.c b/drivers/acpi/acpica/rsmisc.c
index 41eea4bc089c..1fe49d223663 100644
--- a/drivers/acpi/acpica/rsmisc.c
+++ b/drivers/acpi/acpica/rsmisc.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/rsserial.c b/drivers/acpi/acpica/rsserial.c
index 9e8407223d95..4c8c6fe6ea74 100644
--- a/drivers/acpi/acpica/rsserial.c
+++ b/drivers/acpi/acpica/rsserial.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/rsutils.c b/drivers/acpi/acpica/rsutils.c
index 897a5ceb0420..ece3cd60cc6a 100644
--- a/drivers/acpi/acpica/rsutils.c
+++ b/drivers/acpi/acpica/rsutils.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/rsxface.c b/drivers/acpi/acpica/rsxface.c
index 877ab9202133..8e6276df0226 100644
--- a/drivers/acpi/acpica/rsxface.c
+++ b/drivers/acpi/acpica/rsxface.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -60,11 +60,11 @@ ACPI_MODULE_NAME("rsxface")
         ACPI_COPY_FIELD(out, in, min_address_fixed);         \
         ACPI_COPY_FIELD(out, in, max_address_fixed);         \
         ACPI_COPY_FIELD(out, in, info);                      \
-        ACPI_COPY_FIELD(out, in, granularity);               \
-        ACPI_COPY_FIELD(out, in, minimum);                   \
-        ACPI_COPY_FIELD(out, in, maximum);                   \
-        ACPI_COPY_FIELD(out, in, translation_offset);        \
-        ACPI_COPY_FIELD(out, in, address_length);            \
+        ACPI_COPY_FIELD(out, in, address.granularity);       \
+        ACPI_COPY_FIELD(out, in, address.minimum);           \
+        ACPI_COPY_FIELD(out, in, address.maximum);           \
+        ACPI_COPY_FIELD(out, in, address.translation_offset); \
+        ACPI_COPY_FIELD(out, in, address.address_length);    \
         ACPI_COPY_FIELD(out, in, resource_source);
 /* Local prototypes */
 static acpi_status
diff --git a/drivers/acpi/acpica/tbdata.c b/drivers/acpi/acpica/tbdata.c
index f499c10ceb4a..6a144957aadd 100644
--- a/drivers/acpi/acpica/tbdata.c
+++ b/drivers/acpi/acpica/tbdata.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/tbfadt.c b/drivers/acpi/acpica/tbfadt.c
index 41519a958083..7d2486005e3f 100644
--- a/drivers/acpi/acpica/tbfadt.c
+++ b/drivers/acpi/acpica/tbfadt.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/tbfind.c b/drivers/acpi/acpica/tbfind.c
index cb947700206c..0b879fcfef67 100644
--- a/drivers/acpi/acpica/tbfind.c
+++ b/drivers/acpi/acpica/tbfind.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/tbinstal.c b/drivers/acpi/acpica/tbinstal.c
index 755b90c40ddf..9bad45e63a45 100644
--- a/drivers/acpi/acpica/tbinstal.c
+++ b/drivers/acpi/acpica/tbinstal.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/tbprint.c b/drivers/acpi/acpica/tbprint.c
index df3bb20ea325..ef16c06e5091 100644
--- a/drivers/acpi/acpica/tbprint.c
+++ b/drivers/acpi/acpica/tbprint.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/tbutils.c b/drivers/acpi/acpica/tbutils.c
index 6b1ca9991b90..6559a58439c5 100644
--- a/drivers/acpi/acpica/tbutils.c
+++ b/drivers/acpi/acpica/tbutils.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/tbxface.c b/drivers/acpi/acpica/tbxface.c
index 6482b0ded652..60e94f87f27a 100644
--- a/drivers/acpi/acpica/tbxface.c
+++ b/drivers/acpi/acpica/tbxface.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -265,45 +265,6 @@ ACPI_EXPORT_SYMBOL(acpi_get_table_header)
 
 /*******************************************************************************
  *
- * FUNCTION:    acpi_unload_table_id
- *
- * PARAMETERS:  id            - Owner ID of the table to be removed.
- *
- * RETURN:      Status
- *
- * DESCRIPTION: This routine is used to force the unload of a table (by id)
- *
- ******************************************************************************/
-acpi_status acpi_unload_table_id(acpi_owner_id id)
-{
-        int i;
-        acpi_status status = AE_NOT_EXIST;
-
-        ACPI_FUNCTION_TRACE(acpi_unload_table_id);
-
-        /* Find table in the global table list */
-        for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) {
-                if (id != acpi_gbl_root_table_list.tables[i].owner_id) {
-                        continue;
-                }
-                /*
-                 * Delete all namespace objects owned by this table. Note that these
-                 * objects can appear anywhere in the namespace by virtue of the AML
-                 * "Scope" operator. Thus, we need to track ownership by an ID, not
-                 * simply a position within the hierarchy
-                 */
-                acpi_tb_delete_namespace_by_owner(i);
-                status = acpi_tb_release_owner_id(i);
-                acpi_tb_set_table_loaded_flag(i, FALSE);
-                break;
-        }
-        return_ACPI_STATUS(status);
-}
-
-ACPI_EXPORT_SYMBOL(acpi_unload_table_id)
-
-/*******************************************************************************
- *
  * FUNCTION:    acpi_get_table_with_size
  *
  * PARAMETERS:  signature           - ACPI signature of needed table
diff --git a/drivers/acpi/acpica/tbxfload.c b/drivers/acpi/acpica/tbxfload.c
index ab5308b81aa8..aadb3002a2dd 100644
--- a/drivers/acpi/acpica/tbxfload.c
+++ b/drivers/acpi/acpica/tbxfload.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/tbxfroot.c b/drivers/acpi/acpica/tbxfroot.c
index 43a54af2b548..eac52cf14f1a 100644
--- a/drivers/acpi/acpica/tbxfroot.c
+++ b/drivers/acpi/acpica/tbxfroot.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/utaddress.c b/drivers/acpi/acpica/utaddress.c
index a1acec9d2ef3..1279f50da757 100644
--- a/drivers/acpi/acpica/utaddress.c
+++ b/drivers/acpi/acpica/utaddress.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/utalloc.c b/drivers/acpi/acpica/utalloc.c
index efac83c606dc..61d8f6d186d1 100644
--- a/drivers/acpi/acpica/utalloc.c
+++ b/drivers/acpi/acpica/utalloc.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/utbuffer.c b/drivers/acpi/acpica/utbuffer.c
index 038ea887f562..242bd071f007 100644
--- a/drivers/acpi/acpica/utbuffer.c
+++ b/drivers/acpi/acpica/utbuffer.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/utcache.c b/drivers/acpi/acpica/utcache.c
index 78fde0aac487..eacc5eee362e 100644
--- a/drivers/acpi/acpica/utcache.c
+++ b/drivers/acpi/acpica/utcache.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/utcopy.c b/drivers/acpi/acpica/utcopy.c
index ff601c0f7c7a..c37ec5035f4c 100644
--- a/drivers/acpi/acpica/utcopy.c
+++ b/drivers/acpi/acpica/utcopy.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/utdebug.c b/drivers/acpi/acpica/utdebug.c
index e516254c63b2..57078e3ea9b7 100644
--- a/drivers/acpi/acpica/utdebug.c
+++ b/drivers/acpi/acpica/utdebug.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/utdecode.c b/drivers/acpi/acpica/utdecode.c
index 40e923e675fc..988e23b7795c 100644
--- a/drivers/acpi/acpica/utdecode.c
+++ b/drivers/acpi/acpica/utdecode.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/utdelete.c b/drivers/acpi/acpica/utdelete.c
index a3516de213fa..71fce389fd48 100644
--- a/drivers/acpi/acpica/utdelete.c
+++ b/drivers/acpi/acpica/utdelete.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/uterror.c b/drivers/acpi/acpica/uterror.c
index 8e544d4688cd..9ef80f2828e3 100644
--- a/drivers/acpi/acpica/uterror.c
+++ b/drivers/acpi/acpica/uterror.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/uteval.c b/drivers/acpi/acpica/uteval.c
index 8fed1482d228..6c738fa0cd42 100644
--- a/drivers/acpi/acpica/uteval.c
+++ b/drivers/acpi/acpica/uteval.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/utexcep.c b/drivers/acpi/acpica/utexcep.c
index 0403dcaabaf2..743a0ae9fb17 100644
--- a/drivers/acpi/acpica/utexcep.c
+++ b/drivers/acpi/acpica/utexcep.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/utfileio.c b/drivers/acpi/acpica/utfileio.c
index 4e263a8cc6f0..7e1168be39fa 100644
--- a/drivers/acpi/acpica/utfileio.c
+++ b/drivers/acpi/acpica/utfileio.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/utglobal.c b/drivers/acpi/acpica/utglobal.c
index 77ceac715f28..5e8df9177da4 100644
--- a/drivers/acpi/acpica/utglobal.c
+++ b/drivers/acpi/acpica/utglobal.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/uthex.c b/drivers/acpi/acpica/uthex.c
index 9afa9441b183..aa448278ba28 100644
--- a/drivers/acpi/acpica/uthex.c
+++ b/drivers/acpi/acpica/uthex.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/utids.c b/drivers/acpi/acpica/utids.c
index 4b12880e5b11..27431cfc1c44 100644
--- a/drivers/acpi/acpica/utids.c
+++ b/drivers/acpi/acpica/utids.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/utinit.c b/drivers/acpi/acpica/utinit.c
index 77120ec9ea86..e402e07b4846 100644
--- a/drivers/acpi/acpica/utinit.c
+++ b/drivers/acpi/acpica/utinit.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/utlock.c b/drivers/acpi/acpica/utlock.c
index dc6e96547f18..089f78bbd59b 100644
--- a/drivers/acpi/acpica/utlock.c
+++ b/drivers/acpi/acpica/utlock.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/utmath.c b/drivers/acpi/acpica/utmath.c
index d44dee6ee10a..f9ff100f0159 100644
--- a/drivers/acpi/acpica/utmath.c
+++ b/drivers/acpi/acpica/utmath.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/utmisc.c b/drivers/acpi/acpica/utmisc.c
index 2e2bb14e1099..56bbacd576f2 100644
--- a/drivers/acpi/acpica/utmisc.c
+++ b/drivers/acpi/acpica/utmisc.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/utmutex.c b/drivers/acpi/acpica/utmutex.c
index 82717fff9ffc..37b8b58fcd56 100644
--- a/drivers/acpi/acpica/utmutex.c
+++ b/drivers/acpi/acpica/utmutex.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/utobject.c b/drivers/acpi/acpica/utobject.c
index dfa9009bfc87..7d83efe1ea29 100644
--- a/drivers/acpi/acpica/utobject.c
+++ b/drivers/acpi/acpica/utobject.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/utosi.c b/drivers/acpi/acpica/utosi.c
index 685766fc6ca8..574cd3118313 100644
--- a/drivers/acpi/acpica/utosi.c
+++ b/drivers/acpi/acpica/utosi.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/utownerid.c b/drivers/acpi/acpica/utownerid.c
index 36bec57ebd23..2959217067cb 100644
--- a/drivers/acpi/acpica/utownerid.c
+++ b/drivers/acpi/acpica/utownerid.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/utpredef.c b/drivers/acpi/acpica/utpredef.c
index db30caff130a..29e449935a82 100644
--- a/drivers/acpi/acpica/utpredef.c
+++ b/drivers/acpi/acpica/utpredef.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/utprint.c b/drivers/acpi/acpica/utprint.c
index 0ce3f5a0dd67..82ca9142e10d 100644
--- a/drivers/acpi/acpica/utprint.c
+++ b/drivers/acpi/acpica/utprint.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/utresrc.c b/drivers/acpi/acpica/utresrc.c
index bc1ff820c7dd..b3505dbc715e 100644
--- a/drivers/acpi/acpica/utresrc.c
+++ b/drivers/acpi/acpica/utresrc.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/utstate.c b/drivers/acpi/acpica/utstate.c
index 1cc97a752c15..8274cc16edc3 100644
--- a/drivers/acpi/acpica/utstate.c
+++ b/drivers/acpi/acpica/utstate.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/utstring.c b/drivers/acpi/acpica/utstring.c
index 6dc54b3c28b0..83b6c52490dc 100644
--- a/drivers/acpi/acpica/utstring.c
+++ b/drivers/acpi/acpica/utstring.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/uttrack.c b/drivers/acpi/acpica/uttrack.c
index 7d0ee969d781..130dd9f96f0f 100644
--- a/drivers/acpi/acpica/uttrack.c
+++ b/drivers/acpi/acpica/uttrack.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/utuuid.c b/drivers/acpi/acpica/utuuid.c
index 4dc33130f134..c6149a212149 100644
--- a/drivers/acpi/acpica/utuuid.c
+++ b/drivers/acpi/acpica/utuuid.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/utxface.c b/drivers/acpi/acpica/utxface.c
index 49c873c68756..0929187bdce0 100644
--- a/drivers/acpi/acpica/utxface.c
+++ b/drivers/acpi/acpica/utxface.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/utxferror.c b/drivers/acpi/acpica/utxferror.c
index 88ef77f3cf88..306e785f9418 100644
--- a/drivers/acpi/acpica/utxferror.c
+++ b/drivers/acpi/acpica/utxferror.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/utxfinit.c b/drivers/acpi/acpica/utxfinit.c
index b1fd6886e439..083a76891889 100644
--- a/drivers/acpi/acpica/utxfinit.c
+++ b/drivers/acpi/acpica/utxfinit.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/acpica/utxfmutex.c b/drivers/acpi/acpica/utxfmutex.c
index 2a0f9e04d3a4..f2606af3364c 100644
--- a/drivers/acpi/acpica/utxfmutex.c
+++ b/drivers/acpi/acpica/utxfmutex.c
@@ -5,7 +5,7 @@
  ******************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c
index c0d44d394ca3..735db11a9b00 100644
--- a/drivers/acpi/device_pm.c
+++ b/drivers/acpi/device_pm.c
@@ -1027,7 +1027,6 @@ EXPORT_SYMBOL_GPL(acpi_subsys_freeze);
 
 static struct dev_pm_domain acpi_general_pm_domain = {
         .ops = {
-#ifdef CONFIG_PM
                 .runtime_suspend = acpi_subsys_runtime_suspend,
                 .runtime_resume = acpi_subsys_runtime_resume,
 #ifdef CONFIG_PM_SLEEP
@@ -1041,7 +1040,6 @@ static struct dev_pm_domain acpi_general_pm_domain = {
                 .poweroff_late = acpi_subsys_suspend_late,
                 .restore_early = acpi_subsys_resume_early,
 #endif
-#endif
         },
 };
 
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 1b5853f384e2..14d0c89ada2a 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -1,8 +1,8 @@
 /*
- *  ec.c - ACPI Embedded Controller Driver (v2.2)
+ *  ec.c - ACPI Embedded Controller Driver (v3)
  *
- *  Copyright (C) 2001-2014 Intel Corporation
- *    Author: 2014       Lv Zheng <lv.zheng@intel.com>
+ *  Copyright (C) 2001-2015 Intel Corporation
+ *    Author: 2014, 2015 Lv Zheng <lv.zheng@intel.com>
  *            2006, 2007 Alexey Starikovskiy <alexey.y.starikovskiy@intel.com>
  *            2006       Denis Sadykov <denis.m.sadykov@intel.com>
  *            2004       Luming Yu <luming.yu@intel.com>
@@ -31,6 +31,7 @@
 
 /* Uncomment next line to get verbose printout */
 /* #define DEBUG */
+#define DEBUG_REF 0
 #define pr_fmt(fmt) "ACPI : EC: " fmt
 
 #include <linux/kernel.h>
@@ -71,20 +72,32 @@ enum ec_command {
 #define ACPI_EC_DELAY           500     /* Wait 500ms max. during EC ops */
 #define ACPI_EC_UDELAY_GLK      1000    /* Wait 1ms max. to get global lock */
 #define ACPI_EC_MSI_UDELAY      550     /* Wait 550us for MSI EC */
+#define ACPI_EC_UDELAY_POLL     1000    /* Wait 1ms for EC transaction polling */
 #define ACPI_EC_CLEAR_MAX       100     /* Maximum number of events to query
                                          * when trying to clear the EC */
 
 enum {
-        EC_FLAGS_QUERY_PENDING,         /* Query is pending */
-        EC_FLAGS_GPE_STORM,             /* GPE storm detected */
+        EC_FLAGS_EVENT_ENABLED,         /* Event is enabled */
+        EC_FLAGS_EVENT_PENDING,         /* Event is pending */
+        EC_FLAGS_EVENT_DETECTED,        /* Event is detected */
         EC_FLAGS_HANDLERS_INSTALLED,    /* Handlers for GPE and
                                          * OpReg are installed */
-        EC_FLAGS_BLOCKED,               /* Transactions are blocked */
+        EC_FLAGS_STARTED,               /* Driver is started */
+        EC_FLAGS_STOPPED,               /* Driver is stopped */
+        EC_FLAGS_COMMAND_STORM,         /* GPE storms occurred to the
+                                         * current command processing */
 };
 
 #define ACPI_EC_COMMAND_POLL            0x01 /* Available for command byte */
 #define ACPI_EC_COMMAND_COMPLETE        0x02 /* Completed last byte */
 
+#define ec_debug_ref(ec, fmt, ...)                                      \
+        do {                                                            \
+                if (DEBUG_REF)                                          \
+                        pr_debug("%lu: " fmt, ec->reference_count,      \
+                                 ## __VA_ARGS__);                       \
+        } while (0)
+
 /* ec.c is compiled in acpi namespace so this shows up as acpi.ec_delay param */
 static unsigned int ec_delay __read_mostly = ACPI_EC_DELAY;
 module_param(ec_delay, uint, 0644);
@@ -105,6 +118,7 @@ struct acpi_ec_query_handler {
         acpi_handle handle;
         void *data;
         u8 query_bit;
+        struct kref kref;
 };
 
 struct transaction {
@@ -117,8 +131,12 @@ struct transaction {
         u8 wlen;
         u8 rlen;
         u8 flags;
+        unsigned long timestamp;
 };
 
+static int acpi_ec_query(struct acpi_ec *ec, u8 *data);
+static void advance_transaction(struct acpi_ec *ec);
+
 struct acpi_ec *boot_ec, *first_ec;
 EXPORT_SYMBOL(first_ec);
 
@@ -129,7 +147,28 @@ static int EC_FLAGS_CLEAR_ON_RESUME; /* Needs acpi_ec_clear() on boot/resume */
 static int EC_FLAGS_QUERY_HANDSHAKE; /* Needs QR_EC issued when SCI_EVT set */
 
 /* --------------------------------------------------------------------------
- *                           Transaction Management
+ *                           Device Flags
+ * -------------------------------------------------------------------------- */
+
+static bool acpi_ec_started(struct acpi_ec *ec)
+{
+        return test_bit(EC_FLAGS_STARTED, &ec->flags) &&
+               !test_bit(EC_FLAGS_STOPPED, &ec->flags);
+}
+
+static bool acpi_ec_flushed(struct acpi_ec *ec)
+{
+        return ec->reference_count == 1;
+}
+
+static bool acpi_ec_has_pending_event(struct acpi_ec *ec)
+{
+        return test_bit(EC_FLAGS_EVENT_DETECTED, &ec->flags) ||
+               test_bit(EC_FLAGS_EVENT_PENDING, &ec->flags);
+}
+
+/* --------------------------------------------------------------------------
+ *                           EC Registers
  * -------------------------------------------------------------------------- */
 
 static inline u8 acpi_ec_read_status(struct acpi_ec *ec)
@@ -151,6 +190,7 @@ static inline u8 acpi_ec_read_data(struct acpi_ec *ec)
 {
         u8 x = inb(ec->data_addr);
 
+        ec->curr->timestamp = jiffies;
         pr_debug("EC_DATA(R) = 0x%2.2x\n", x);
         return x;
 }
@@ -159,12 +199,14 @@ static inline void acpi_ec_write_cmd(struct acpi_ec *ec, u8 command)
 {
         pr_debug("EC_SC(W) = 0x%2.2x\n", command);
         outb(command, ec->command_addr);
+        ec->curr->timestamp = jiffies;
 }
 
 static inline void acpi_ec_write_data(struct acpi_ec *ec, u8 data)
 {
         pr_debug("EC_DATA(W) = 0x%2.2x\n", data);
         outb(data, ec->data_addr);
+        ec->curr->timestamp = jiffies;
 }
 
 #ifdef DEBUG
@@ -188,6 +230,203 @@ static const char *acpi_ec_cmd_string(u8 cmd)
 #define acpi_ec_cmd_string(cmd)         "UNDEF"
 #endif
 
+/* --------------------------------------------------------------------------
+ *                           GPE Registers
+ * -------------------------------------------------------------------------- */
+
+static inline bool acpi_ec_is_gpe_raised(struct acpi_ec *ec)
+{
+        acpi_event_status gpe_status = 0;
+
+        (void)acpi_get_gpe_status(NULL, ec->gpe, &gpe_status);
+        return (gpe_status & ACPI_EVENT_FLAG_SET) ? true : false;
+}
+
+static inline void acpi_ec_enable_gpe(struct acpi_ec *ec, bool open)
+{
+        if (open)
+                acpi_enable_gpe(NULL, ec->gpe);
+        else {
+                BUG_ON(ec->reference_count < 1);
+                acpi_set_gpe(NULL, ec->gpe, ACPI_GPE_ENABLE);
+        }
+        if (acpi_ec_is_gpe_raised(ec)) {
+                /*
+                 * On some platforms, EN=1 writes cannot trigger GPE. So
+                 * software need to manually trigger a pseudo GPE event on
+                 * EN=1 writes.
+                 */
+                pr_debug("***** Polling quirk *****\n");
+                advance_transaction(ec);
+        }
+}
+
+static inline void acpi_ec_disable_gpe(struct acpi_ec *ec, bool close)
+{
+        if (close)
+                acpi_disable_gpe(NULL, ec->gpe);
+        else {
+                BUG_ON(ec->reference_count < 1);
+                acpi_set_gpe(NULL, ec->gpe, ACPI_GPE_DISABLE);
+        }
+}
+
+static inline void acpi_ec_clear_gpe(struct acpi_ec *ec)
+{
+        /*
+         * GPE STS is a W1C register, which means:
+         * 1. Software can clear it without worrying about clearing other
+         *    GPEs' STS bits when the hardware sets them in parallel.
+         * 2. As long as software can ensure only clearing it when it is
+         *    set, hardware won't set it in parallel.
+         * So software can clear GPE in any contexts.
+         * Warning: do not move the check into advance_transaction() as the
+         * EC commands will be sent without GPE raised.
+         */
+        if (!acpi_ec_is_gpe_raised(ec))
+                return;
+        acpi_clear_gpe(NULL, ec->gpe);
+}
+
+/* --------------------------------------------------------------------------
+ *                           Transaction Management
+ * -------------------------------------------------------------------------- */
+
+static void acpi_ec_submit_request(struct acpi_ec *ec)
+{
+        ec->reference_count++;
+        if (ec->reference_count == 1)
+                acpi_ec_enable_gpe(ec, true);
+}
+
+static void acpi_ec_complete_request(struct acpi_ec *ec)
+{
+        bool flushed = false;
+
+        ec->reference_count--;
+        if (ec->reference_count == 0)
+                acpi_ec_disable_gpe(ec, true);
+        flushed = acpi_ec_flushed(ec);
+        if (flushed)
+                wake_up(&ec->wait);
+}
+
+static void acpi_ec_set_storm(struct acpi_ec *ec, u8 flag)
+{
+        if (!test_bit(flag, &ec->flags)) {
+                acpi_ec_disable_gpe(ec, false);
+                pr_debug("+++++ Polling enabled +++++\n");
+                set_bit(flag, &ec->flags);
+        }
+}
+
+static void acpi_ec_clear_storm(struct acpi_ec *ec, u8 flag)
+{
+        if (test_bit(flag, &ec->flags)) {
+                clear_bit(flag, &ec->flags);
+                acpi_ec_enable_gpe(ec, false);
+                pr_debug("+++++ Polling disabled +++++\n");
+        }
+}
+
+/*
+ * acpi_ec_submit_flushable_request() - Increase the reference count unless
+ *                                      the flush operation is not in
+ *                                      progress
+ * @ec: the EC device
+ * @allow_event: whether event should be handled
+ *
+ * This function must be used before taking a new action that should hold
+ * the reference count.  If this function returns false, then the action
+ * must be discarded or it will prevent the flush operation from being
+ * completed.
+ *
+ * During flushing, QR_EC command need to pass this check when there is a
+ * pending event, so that the reference count held for the pending event
+ * can be decreased by the completion of the QR_EC command.
+ */
+static bool acpi_ec_submit_flushable_request(struct acpi_ec *ec,
+                                             bool allow_event)
+{
+        if (!acpi_ec_started(ec)) {
+                if (!allow_event || !acpi_ec_has_pending_event(ec))
+                        return false;
+        }
+        acpi_ec_submit_request(ec);
+        return true;
+}
+
+static void acpi_ec_submit_event(struct acpi_ec *ec)
+{
+        if (!test_bit(EC_FLAGS_EVENT_DETECTED, &ec->flags) ||
+            !test_bit(EC_FLAGS_EVENT_ENABLED, &ec->flags))
+                return;
+        /* Hold reference for pending event */
+        if (!acpi_ec_submit_flushable_request(ec, true))
+                return;
+        ec_debug_ref(ec, "Increase event\n");
+        if (!test_and_set_bit(EC_FLAGS_EVENT_PENDING, &ec->flags)) {
+                pr_debug("***** Event query started *****\n");
+                schedule_work(&ec->work);
+                return;
+        }
+        acpi_ec_complete_request(ec);
+        ec_debug_ref(ec, "Decrease event\n");
+}
+
+static void acpi_ec_complete_event(struct acpi_ec *ec)
+{
+        if (ec->curr->command == ACPI_EC_COMMAND_QUERY) {
+                clear_bit(EC_FLAGS_EVENT_PENDING, &ec->flags);
+                pr_debug("***** Event query stopped *****\n");
+                /* Unhold reference for pending event */
+                acpi_ec_complete_request(ec);
+                ec_debug_ref(ec, "Decrease event\n");
+                /* Check if there is another SCI_EVT detected */
+                acpi_ec_submit_event(ec);
+        }
+}
+
+static void acpi_ec_submit_detection(struct acpi_ec *ec)
+{
+        /* Hold reference for query submission */
+        if (!acpi_ec_submit_flushable_request(ec, false))
+                return;
+        ec_debug_ref(ec, "Increase query\n");
+        if (!test_and_set_bit(EC_FLAGS_EVENT_DETECTED, &ec->flags)) {
+                pr_debug("***** Event detection blocked *****\n");
+                acpi_ec_submit_event(ec);
+                return;
+        }
+        acpi_ec_complete_request(ec);
+        ec_debug_ref(ec, "Decrease query\n");
+}
+
+static void acpi_ec_complete_detection(struct acpi_ec *ec)
+{
+        if (ec->curr->command == ACPI_EC_COMMAND_QUERY) {
+                clear_bit(EC_FLAGS_EVENT_DETECTED, &ec->flags);
+                pr_debug("***** Event detetion unblocked *****\n");
+                /* Unhold reference for query submission */
+                acpi_ec_complete_request(ec);
+                ec_debug_ref(ec, "Decrease query\n");
+        }
+}
+
+static void acpi_ec_enable_event(struct acpi_ec *ec)
+{
+        unsigned long flags;
+
+        spin_lock_irqsave(&ec->lock, flags);
+        set_bit(EC_FLAGS_EVENT_ENABLED, &ec->flags);
+        /*
+         * An event may be pending even with SCI_EVT=0, so QR_EC should
+         * always be issued right after started.
+         */
+        acpi_ec_submit_detection(ec);
+        spin_unlock_irqrestore(&ec->lock, flags);
+}
+
 static int ec_transaction_completed(struct acpi_ec *ec)
 {
         unsigned long flags;
@@ -200,7 +439,7 @@ static int ec_transaction_completed(struct acpi_ec *ec)
         return ret;
 }
 
-static bool advance_transaction(struct acpi_ec *ec)
+static void advance_transaction(struct acpi_ec *ec)
 {
         struct transaction *t;
         u8 status;
@@ -208,6 +447,12 @@ static bool advance_transaction(struct acpi_ec *ec)
 
         pr_debug("===== %s (%d) =====\n",
                  in_interrupt() ? "IRQ" : "TASK", smp_processor_id());
+        /*
+         * By always clearing STS before handling all indications, we can
+         * ensure a hardware STS 0->1 change after this clearing can always
+         * trigger a GPE interrupt.
+         */
+        acpi_ec_clear_gpe(ec);
         status = acpi_ec_read_status(ec);
         t = ec->curr;
         if (!t)
@@ -223,6 +468,7 @@ static bool advance_transaction(struct acpi_ec *ec)
                                 t->rdata[t->ri++] = acpi_ec_read_data(ec);
                                 if (t->rlen == t->ri) {
                                         t->flags |= ACPI_EC_COMMAND_COMPLETE;
+                                        acpi_ec_complete_event(ec);
                                         if (t->command == ACPI_EC_COMMAND_QUERY)
                                                 pr_debug("***** Command(%s) hardware completion *****\n",
                                                          acpi_ec_cmd_string(t->command));
@@ -233,25 +479,29 @@ static bool advance_transaction(struct acpi_ec *ec)
                 } else if (t->wlen == t->wi &&
                            (status & ACPI_EC_FLAG_IBF) == 0) {
                         t->flags |= ACPI_EC_COMMAND_COMPLETE;
+                        acpi_ec_complete_event(ec);
                         wakeup = true;
                 }
-                return wakeup;
+                goto out;
         } else {
                 if (EC_FLAGS_QUERY_HANDSHAKE &&
                     !(status & ACPI_EC_FLAG_SCI) &&
                     (t->command == ACPI_EC_COMMAND_QUERY)) {
                         t->flags |= ACPI_EC_COMMAND_POLL;
+                        acpi_ec_complete_detection(ec);
                         t->rdata[t->ri++] = 0x00;
                         t->flags |= ACPI_EC_COMMAND_COMPLETE;
+                        acpi_ec_complete_event(ec);
                         pr_debug("***** Command(%s) software completion *****\n",
                                  acpi_ec_cmd_string(t->command));
                         wakeup = true;
                 } else if ((status & ACPI_EC_FLAG_IBF) == 0) {
                         acpi_ec_write_cmd(ec, t->command);
                         t->flags |= ACPI_EC_COMMAND_POLL;
+                        acpi_ec_complete_detection(ec);
                 } else
                         goto err;
-                return wakeup;
+                goto out;
         }
 err:
         /*
@@ -259,28 +509,27 @@ err:
          * otherwise will take a not handled IRQ as a false one.
          */
         if (!(status & ACPI_EC_FLAG_SCI)) {
-                if (in_interrupt() && t)
-                        ++t->irq_count;
+                if (in_interrupt() && t) {
+                        if (t->irq_count < ec_storm_threshold)
+                                ++t->irq_count;
+                        /* Allow triggering on 0 threshold */
+                        if (t->irq_count == ec_storm_threshold)
+                                acpi_ec_set_storm(ec, EC_FLAGS_COMMAND_STORM);
+                }
         }
-        return wakeup;
+out:
+        if (status & ACPI_EC_FLAG_SCI)
+                acpi_ec_submit_detection(ec);
+        if (wakeup && in_interrupt())
+                wake_up(&ec->wait);
 }
 
 static void start_transaction(struct acpi_ec *ec)
 {
         ec->curr->irq_count = ec->curr->wi = ec->curr->ri = 0;
         ec->curr->flags = 0;
-        (void)advance_transaction(ec);
-}
-
-static int acpi_ec_sync_query(struct acpi_ec *ec, u8 *data);
-
-static int ec_check_sci_sync(struct acpi_ec *ec, u8 state)
-{
-        if (state & ACPI_EC_FLAG_SCI) {
-                if (!test_and_set_bit(EC_FLAGS_QUERY_PENDING, &ec->flags))
-                        return acpi_ec_sync_query(ec, NULL);
-        }
-        return 0;
+        ec->curr->timestamp = jiffies;
+        advance_transaction(ec);
 }
 
 static int ec_poll(struct acpi_ec *ec)
@@ -291,20 +540,25 @@ static int ec_poll(struct acpi_ec *ec)
         while (repeat--) {
                 unsigned long delay = jiffies +
                         msecs_to_jiffies(ec_delay);
+                unsigned long usecs = ACPI_EC_UDELAY_POLL;
                 do {
                         /* don't sleep with disabled interrupts */
                         if (EC_FLAGS_MSI || irqs_disabled()) {
-                                udelay(ACPI_EC_MSI_UDELAY);
+                                usecs = ACPI_EC_MSI_UDELAY;
+                                udelay(usecs);
                                 if (ec_transaction_completed(ec))
                                         return 0;
                         } else {
                                 if (wait_event_timeout(ec->wait,
                                                 ec_transaction_completed(ec),
-                                                msecs_to_jiffies(1)))
+                                                usecs_to_jiffies(usecs)))
                                         return 0;
                         }
                         spin_lock_irqsave(&ec->lock, flags);
-                        (void)advance_transaction(ec);
+                        if (time_after(jiffies,
+                                        ec->curr->timestamp +
+                                        usecs_to_jiffies(usecs)))
+                                advance_transaction(ec);
                         spin_unlock_irqrestore(&ec->lock, flags);
                 } while (time_before(jiffies, delay));
                 pr_debug("controller reset, restart transaction\n");
@@ -325,21 +579,29 @@ static int acpi_ec_transaction_unlocked(struct acpi_ec *ec,
                 udelay(ACPI_EC_MSI_UDELAY);
         /* start transaction */
         spin_lock_irqsave(&ec->lock, tmp);
+        /* Enable GPE for command processing (IBF=0/OBF=1) */
+        if (!acpi_ec_submit_flushable_request(ec, true)) {
+                ret = -EINVAL;
+                goto unlock;
+        }
+        ec_debug_ref(ec, "Increase command\n");
         /* following two actions should be kept atomic */
         ec->curr = t;
         pr_debug("***** Command(%s) started *****\n",
                  acpi_ec_cmd_string(t->command));
         start_transaction(ec);
-        if (ec->curr->command == ACPI_EC_COMMAND_QUERY) {
-                clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags);
-                pr_debug("***** Event stopped *****\n");
-        }
         spin_unlock_irqrestore(&ec->lock, tmp);
         ret = ec_poll(ec);
         spin_lock_irqsave(&ec->lock, tmp);
+        if (t->irq_count == ec_storm_threshold)
+                acpi_ec_clear_storm(ec, EC_FLAGS_COMMAND_STORM);
         pr_debug("***** Command(%s) stopped *****\n",
                  acpi_ec_cmd_string(t->command));
         ec->curr = NULL;
+        /* Disable GPE for command processing (IBF=0/OBF=1) */
+        acpi_ec_complete_request(ec);
+        ec_debug_ref(ec, "Decrease command\n");
+unlock:
         spin_unlock_irqrestore(&ec->lock, tmp);
         return ret;
 }
@@ -354,10 +616,6 @@ static int acpi_ec_transaction(struct acpi_ec *ec, struct transaction *t)
         if (t->rdata)
                 memset(t->rdata, 0, t->rlen);
         mutex_lock(&ec->mutex);
-        if (test_bit(EC_FLAGS_BLOCKED, &ec->flags)) {
-                status = -EINVAL;
-                goto unlock;
-        }
         if (ec->global_lock) {
                 status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk);
                 if (ACPI_FAILURE(status)) {
@@ -365,26 +623,11 @@ static int acpi_ec_transaction(struct acpi_ec *ec, struct transaction *t)
                         goto unlock;
                 }
         }
-        /* disable GPE during transaction if storm is detected */
-        if (test_bit(EC_FLAGS_GPE_STORM, &ec->flags)) {
-                /* It has to be disabled, so that it doesn't trigger. */
-                acpi_disable_gpe(NULL, ec->gpe);
-        }
 
         status = acpi_ec_transaction_unlocked(ec, t);
 
-        /* check if we received SCI during transaction */
-        ec_check_sci_sync(ec, acpi_ec_read_status(ec));
-        if (test_bit(EC_FLAGS_GPE_STORM, &ec->flags)) {
+        if (test_bit(EC_FLAGS_COMMAND_STORM, &ec->flags))
                 msleep(1);
-                /* It is safe to enable the GPE outside of the transaction. */
-                acpi_enable_gpe(NULL, ec->gpe);
-        } else if (t->irq_count > ec_storm_threshold) {
-                pr_info("GPE storm detected(%d GPEs), "
-                        "transactions will use polling mode\n",
-                        t->irq_count);
-                set_bit(EC_FLAGS_GPE_STORM, &ec->flags);
-        }
         if (ec->global_lock)
                 acpi_release_global_lock(glk);
 unlock:
@@ -500,7 +743,7 @@ static void acpi_ec_clear(struct acpi_ec *ec)
         u8 value = 0;
 
         for (i = 0; i < ACPI_EC_CLEAR_MAX; i++) {
-                status = acpi_ec_sync_query(ec, &value);
+                status = acpi_ec_query(ec, &value);
                 if (status || !value)
                         break;
         }
@@ -511,6 +754,57 @@ static void acpi_ec_clear(struct acpi_ec *ec)
                 pr_info("%d stale EC events cleared\n", i);
 }
 
+static void acpi_ec_start(struct acpi_ec *ec, bool resuming)
+{
+        unsigned long flags;
+
+        spin_lock_irqsave(&ec->lock, flags);
+        if (!test_and_set_bit(EC_FLAGS_STARTED, &ec->flags)) {
+                pr_debug("+++++ Starting EC +++++\n");
+                /* Enable GPE for event processing (SCI_EVT=1) */
+                if (!resuming) {
+                        acpi_ec_submit_request(ec);
+                        ec_debug_ref(ec, "Increase driver\n");
+                }
+                pr_info("+++++ EC started +++++\n");
+        }
+        spin_unlock_irqrestore(&ec->lock, flags);
+}
+
+static bool acpi_ec_stopped(struct acpi_ec *ec)
+{
+        unsigned long flags;
+        bool flushed;
+
+        spin_lock_irqsave(&ec->lock, flags);
+        flushed = acpi_ec_flushed(ec);
+        spin_unlock_irqrestore(&ec->lock, flags);
+        return flushed;
+}
+
+static void acpi_ec_stop(struct acpi_ec *ec, bool suspending)
+{
+        unsigned long flags;
+
+        spin_lock_irqsave(&ec->lock, flags);
+        if (acpi_ec_started(ec)) {
+                pr_debug("+++++ Stopping EC +++++\n");
+                set_bit(EC_FLAGS_STOPPED, &ec->flags);
+                spin_unlock_irqrestore(&ec->lock, flags);
+                wait_event(ec->wait, acpi_ec_stopped(ec));
+                spin_lock_irqsave(&ec->lock, flags);
+                /* Disable GPE for event processing (SCI_EVT=1) */
+                if (!suspending) {
+                        acpi_ec_complete_request(ec);
+                        ec_debug_ref(ec, "Decrease driver\n");
+                }
+                clear_bit(EC_FLAGS_STARTED, &ec->flags);
+                clear_bit(EC_FLAGS_STOPPED, &ec->flags);
+                pr_info("+++++ EC stopped +++++\n");
+        }
+        spin_unlock_irqrestore(&ec->lock, flags);
+}
+
 void acpi_ec_block_transactions(void)
 {
         struct acpi_ec *ec = first_ec;
@@ -520,7 +814,7 @@ void acpi_ec_block_transactions(void)
 
         mutex_lock(&ec->mutex);
         /* Prevent transactions from being carried out */
-        set_bit(EC_FLAGS_BLOCKED, &ec->flags);
+        acpi_ec_stop(ec, true);
         mutex_unlock(&ec->mutex);
 }
 
@@ -531,14 +825,11 @@ void acpi_ec_unblock_transactions(void)
         if (!ec)
                 return;
 
-        mutex_lock(&ec->mutex);
         /* Allow transactions to be carried out again */
-        clear_bit(EC_FLAGS_BLOCKED, &ec->flags);
+        acpi_ec_start(ec, true);
 
         if (EC_FLAGS_CLEAR_ON_RESUME)
                 acpi_ec_clear(ec);
-
-        mutex_unlock(&ec->mutex);
 }
 
 void acpi_ec_unblock_transactions_early(void)
@@ -548,36 +839,33 @@ void acpi_ec_unblock_transactions_early(void)
          * atomic context during wakeup, so we don't need to acquire the mutex).
          */
         if (first_ec)
-                clear_bit(EC_FLAGS_BLOCKED, &first_ec->flags);
+                acpi_ec_start(first_ec, true);
 }
 
-static int acpi_ec_query_unlocked(struct acpi_ec *ec, u8 *data)
+/* --------------------------------------------------------------------------
+                                Event Management
+   -------------------------------------------------------------------------- */
+static struct acpi_ec_query_handler *
+acpi_ec_get_query_handler(struct acpi_ec_query_handler *handler)
 {
-        int result;
-        u8 d;
-        struct transaction t = {.command = ACPI_EC_COMMAND_QUERY,
-                                .wdata = NULL, .rdata = &d,
-                                .wlen = 0, .rlen = 1};
+        if (handler)
+                kref_get(&handler->kref);
+        return handler;
+}
 
-        if (!ec || !data)
-                return -EINVAL;
-        /*
-         * Query the EC to find out which _Qxx method we need to evaluate.
-         * Note that successful completion of the query causes the ACPI_EC_SCI
-         * bit to be cleared (and thus clearing the interrupt source).
-         */
-        result = acpi_ec_transaction_unlocked(ec, &t);
-        if (result)
-                return result;
-        if (!d)
-                return -ENODATA;
-        *data = d;
-        return 0;
+static void acpi_ec_query_handler_release(struct kref *kref)
+{
+        struct acpi_ec_query_handler *handler =
+                container_of(kref, struct acpi_ec_query_handler, kref);
+
+        kfree(handler);
+}
+
+static void acpi_ec_put_query_handler(struct acpi_ec_query_handler *handler)
+{
+        kref_put(&handler->kref, acpi_ec_query_handler_release);
 }
 
-/* --------------------------------------------------------------------------
-                                Event Management
-   -------------------------------------------------------------------------- */
 int acpi_ec_add_query_handler(struct acpi_ec *ec, u8 query_bit,
                               acpi_handle handle, acpi_ec_query_func func,
                               void *data)
@@ -593,6 +881,7 @@ int acpi_ec_add_query_handler(struct acpi_ec *ec, u8 query_bit,
         handler->func = func;
         handler->data = data;
         mutex_lock(&ec->mutex);
+        kref_init(&handler->kref);
         list_add(&handler->node, &ec->list);
         mutex_unlock(&ec->mutex);
         return 0;
@@ -602,15 +891,18 @@ EXPORT_SYMBOL_GPL(acpi_ec_add_query_handler);
 void acpi_ec_remove_query_handler(struct acpi_ec *ec, u8 query_bit)
 {
         struct acpi_ec_query_handler *handler, *tmp;
+        LIST_HEAD(free_list);
 
         mutex_lock(&ec->mutex);
         list_for_each_entry_safe(handler, tmp, &ec->list, node) {
                 if (query_bit == handler->query_bit) {
-                        list_del(&handler->node);
-                        kfree(handler);
+                        list_del_init(&handler->node);
+                        list_add(&handler->node, &free_list);
                 }
         }
         mutex_unlock(&ec->mutex);
+        list_for_each_entry(handler, &free_list, node)
+                acpi_ec_put_query_handler(handler);
 }
 EXPORT_SYMBOL_GPL(acpi_ec_remove_query_handler);
 
@@ -626,59 +918,58 @@ static void acpi_ec_run(void *cxt)
         else if (handler->handle)
                 acpi_evaluate_object(handler->handle, NULL, NULL, NULL);
         pr_debug("##### Query(0x%02x) stopped #####\n", handler->query_bit);
-        kfree(handler);
+        acpi_ec_put_query_handler(handler);
 }
 
-static int acpi_ec_sync_query(struct acpi_ec *ec, u8 *data)
+static int acpi_ec_query(struct acpi_ec *ec, u8 *data)
 {
         u8 value = 0;
-        int status;
-        struct acpi_ec_query_handler *handler, *copy;
+        int result;
+        acpi_status status;
+        struct acpi_ec_query_handler *handler;
+        struct transaction t = {.command = ACPI_EC_COMMAND_QUERY,
+                                .wdata = NULL, .rdata = &value,
+                                .wlen = 0, .rlen = 1};
 
-        status = acpi_ec_query_unlocked(ec, &value);
+        /*
+         * Query the EC to find out which _Qxx method we need to evaluate.
+         * Note that successful completion of the query causes the ACPI_EC_SCI
+         * bit to be cleared (and thus clearing the interrupt source).
+         */
+        result = acpi_ec_transaction(ec, &t);
+        if (result)
+                return result;
         if (data)
                 *data = value;
-        if (status)
-                return status;
+        if (!value)
+                return -ENODATA;
 
+        mutex_lock(&ec->mutex);
         list_for_each_entry(handler, &ec->list, node) {
                 if (value == handler->query_bit) {
                         /* have custom handler for this bit */
-                        copy = kmalloc(sizeof(*handler), GFP_KERNEL);
-                        if (!copy)
-                                return -ENOMEM;
-                        memcpy(copy, handler, sizeof(*copy));
+                        handler = acpi_ec_get_query_handler(handler);
                         pr_debug("##### Query(0x%02x) scheduled #####\n",
                                  handler->query_bit);
-                        return acpi_os_execute((copy->func) ?
+                        status = acpi_os_execute((handler->func) ?
                                 OSL_NOTIFY_HANDLER : OSL_GPE_HANDLER,
-                                acpi_ec_run, copy);
+                                acpi_ec_run, handler);
+                        if (ACPI_FAILURE(status))
+                                result = -EBUSY;
+                        break;
                 }
         }
-        return 0;
-}
-
-static void acpi_ec_gpe_query(void *ec_cxt)
-{
-        struct acpi_ec *ec = ec_cxt;
-
-        if (!ec)
-                return;
-        mutex_lock(&ec->mutex);
-        acpi_ec_sync_query(ec, NULL);
         mutex_unlock(&ec->mutex);
+        return result;
 }
 
-static int ec_check_sci(struct acpi_ec *ec, u8 state)
+static void acpi_ec_gpe_poller(struct work_struct *work)
 {
-        if (state & ACPI_EC_FLAG_SCI) {
-                if (!test_and_set_bit(EC_FLAGS_QUERY_PENDING, &ec->flags)) {
-                        pr_debug("***** Event started *****\n");
-                        return acpi_os_execute(OSL_NOTIFY_HANDLER,
-                                acpi_ec_gpe_query, ec);
-                }
-        }
-        return 0;
+        struct acpi_ec *ec = container_of(work, struct acpi_ec, work);
+
+        pr_debug("***** Event poller started *****\n");
+        acpi_ec_query(ec, NULL);
+        pr_debug("***** Event poller stopped *****\n");
 }
 
 static u32 acpi_ec_gpe_handler(acpi_handle gpe_device,
@@ -688,11 +979,9 @@ static u32 acpi_ec_gpe_handler(acpi_handle gpe_device,
         struct acpi_ec *ec = data;
 
         spin_lock_irqsave(&ec->lock, flags);
-        if (advance_transaction(ec))
-                wake_up(&ec->wait);
+        advance_transaction(ec);
         spin_unlock_irqrestore(&ec->lock, flags);
-        ec_check_sci(ec, acpi_ec_read_status(ec));
-        return ACPI_INTERRUPT_HANDLED | ACPI_REENABLE_GPE;
+        return ACPI_INTERRUPT_HANDLED;
 }
 
 /* --------------------------------------------------------------------------
@@ -750,11 +1039,11 @@ static struct acpi_ec *make_acpi_ec(void)
 
         if (!ec)
                 return NULL;
-        ec->flags = 1 << EC_FLAGS_QUERY_PENDING;
         mutex_init(&ec->mutex);
         init_waitqueue_head(&ec->wait);
         INIT_LIST_HEAD(&ec->list);
         spin_lock_init(&ec->lock);
+        INIT_WORK(&ec->work, acpi_ec_gpe_poller);
         return ec;
 }
 
@@ -810,13 +1099,13 @@ static int ec_install_handlers(struct acpi_ec *ec)
 
         if (test_bit(EC_FLAGS_HANDLERS_INSTALLED, &ec->flags))
                 return 0;
-        status = acpi_install_gpe_handler(NULL, ec->gpe,
+        status = acpi_install_gpe_raw_handler(NULL, ec->gpe,
                                   ACPI_GPE_EDGE_TRIGGERED,
                                   &acpi_ec_gpe_handler, ec);
         if (ACPI_FAILURE(status))
                 return -ENODEV;
 
-        acpi_enable_gpe(NULL, ec->gpe);
+        acpi_ec_start(ec, false);
         status = acpi_install_address_space_handler(ec->handle,
                                                     ACPI_ADR_SPACE_EC,
                                                     &acpi_ec_space_handler,
@@ -831,7 +1120,7 @@ static int ec_install_handlers(struct acpi_ec *ec)
                         pr_err("Fail in evaluating the _REG object"
                                 " of EC device. Broken bios is suspected.\n");
                 } else {
-                        acpi_disable_gpe(NULL, ec->gpe);
+                        acpi_ec_stop(ec, false);
                         acpi_remove_gpe_handler(NULL, ec->gpe,
                                 &acpi_ec_gpe_handler);
                         return -ENODEV;
@@ -846,7 +1135,7 @@ static void ec_remove_handlers(struct acpi_ec *ec)
 {
         if (!test_bit(EC_FLAGS_HANDLERS_INSTALLED, &ec->flags))
                 return;
-        acpi_disable_gpe(NULL, ec->gpe);
+        acpi_ec_stop(ec, false);
         if (ACPI_FAILURE(acpi_remove_address_space_handler(ec->handle,
                                 ACPI_ADR_SPACE_EC, &acpi_ec_space_handler)))
                 pr_err("failed to remove space handler\n");
@@ -900,14 +1189,11 @@ static int acpi_ec_add(struct acpi_device *device)
         ret = ec_install_handlers(ec);
 
         /* EC is fully operational, allow queries */
-        clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags);
+        acpi_ec_enable_event(ec);
 
         /* Clear stale _Q events if hardware might require that */
-        if (EC_FLAGS_CLEAR_ON_RESUME) {
-                mutex_lock(&ec->mutex);
+        if (EC_FLAGS_CLEAR_ON_RESUME)
                 acpi_ec_clear(ec);
-                mutex_unlock(&ec->mutex);
-        }
         return ret;
 }
 
diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
index 163e82f536fa..56b321aa2b1c 100644
--- a/drivers/acpi/internal.h
+++ b/drivers/acpi/internal.h
@@ -35,6 +35,13 @@ void acpi_int340x_thermal_init(void);
 int acpi_sysfs_init(void);
 void acpi_container_init(void);
 void acpi_memory_hotplug_init(void);
+#ifdef  CONFIG_ACPI_HOTPLUG_IOAPIC
+int acpi_ioapic_add(struct acpi_pci_root *root);
+int acpi_ioapic_remove(struct acpi_pci_root *root);
+#else
+static inline int acpi_ioapic_add(struct acpi_pci_root *root) { return 0; }
+static inline int acpi_ioapic_remove(struct acpi_pci_root *root) { return 0; }
+#endif
 #ifdef CONFIG_ACPI_DOCK
 void register_dock_dependent_device(struct acpi_device *adev,
                                     acpi_handle dshandle);
@@ -68,6 +75,8 @@ static inline void acpi_debugfs_init(void) { return; }
 #endif
 void acpi_lpss_init(void);
 
+void acpi_apd_init(void);
+
 acpi_status acpi_hotplug_schedule(struct acpi_device *adev, u32 src);
 bool acpi_queue_hotplug_work(struct work_struct *work);
 void acpi_device_hotplug(struct acpi_device *adev, u32 src);
@@ -122,11 +131,13 @@ struct acpi_ec {
         unsigned long data_addr;
         unsigned long global_lock;
         unsigned long flags;
+        unsigned long reference_count;
         struct mutex mutex;
         wait_queue_head_t wait;
         struct list_head list;
         struct transaction *curr;
         spinlock_t lock;
+        struct work_struct work;
 };
 
 extern struct acpi_ec *first_ec;
diff --git a/drivers/acpi/ioapic.c b/drivers/acpi/ioapic.c
new file mode 100644
index 000000000000..ccdc8db16bb8
--- /dev/null
+++ b/drivers/acpi/ioapic.c
@@ -0,0 +1,229 @@
+/*
+ * IOAPIC/IOxAPIC/IOSAPIC driver
+ *
+ * Copyright (C) 2009 Fujitsu Limited.
+ * (c) Copyright 2009 Hewlett-Packard Development Company, L.P.
+ *
+ * Copyright (C) 2014 Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Based on original drivers/pci/ioapic.c
+ *      Yinghai Lu <yinghai@kernel.org>
+ *      Jiang Liu <jiang.liu@intel.com>
+ */
+
+/*
+ * This driver manages I/O APICs added by hotplug after boot.
+ * We try to claim all I/O APIC devices, but those present at boot were
+ * registered when we parsed the ACPI MADT.
+ */
+
+#define pr_fmt(fmt) "ACPI : IOAPIC: " fmt
+
+#include <linux/slab.h>
+#include <linux/acpi.h>
+#include <linux/pci.h>
+#include <acpi/acpi.h>
+
+struct acpi_pci_ioapic {
+        acpi_handle     root_handle;
+        acpi_handle     handle;
+        u32             gsi_base;
+        struct resource res;
+        struct pci_dev  *pdev;
+        struct list_head list;
+};
+
+static LIST_HEAD(ioapic_list);
+static DEFINE_MUTEX(ioapic_list_lock);
+
+static acpi_status setup_res(struct acpi_resource *acpi_res, void *data)
+{
+        struct resource *res = data;
+        struct resource_win win;
+
+        res->flags = 0;
+        if (acpi_dev_filter_resource_type(acpi_res, IORESOURCE_MEM) == 0)
+                return AE_OK;
+
+        if (!acpi_dev_resource_memory(acpi_res, res)) {
+                if (acpi_dev_resource_address_space(acpi_res, &win) ||
+                    acpi_dev_resource_ext_address_space(acpi_res, &win))
+                        *res = win.res;
+        }
+        if ((res->flags & IORESOURCE_PREFETCH) ||
+            (res->flags & IORESOURCE_DISABLED))
+                res->flags = 0;
+
+        return AE_CTRL_TERMINATE;
+}
+
+static bool acpi_is_ioapic(acpi_handle handle, char **type)
+{
+        acpi_status status;
+        struct acpi_device_info *info;
+        char *hid = NULL;
+        bool match = false;
+
+        if (!acpi_has_method(handle, "_GSB"))
+                return false;
+
+        status = acpi_get_object_info(handle, &info);
+        if (ACPI_SUCCESS(status)) {
+                if (info->valid & ACPI_VALID_HID)
+                        hid = info->hardware_id.string;
+                if (hid) {
+                        if (strcmp(hid, "ACPI0009") == 0) {
+                                *type = "IOxAPIC";
+                                match = true;
+                        } else if (strcmp(hid, "ACPI000A") == 0) {
+                                *type = "IOAPIC";
+                                match = true;
+                        }
+                }
+                kfree(info);
+        }
+
+        return match;
+}
+
+static acpi_status handle_ioapic_add(acpi_handle handle, u32 lvl,
+                                     void *context, void **rv)
+{
+        acpi_status status;
+        unsigned long long gsi_base;
+        struct acpi_pci_ioapic *ioapic;
+        struct pci_dev *dev = NULL;
+        struct resource *res = NULL;
+        char *type = NULL;
+
+        if (!acpi_is_ioapic(handle, &type))
+                return AE_OK;
+
+        mutex_lock(&ioapic_list_lock);
+        list_for_each_entry(ioapic, &ioapic_list, list)
+                if (ioapic->handle == handle) {
+                        mutex_unlock(&ioapic_list_lock);
+                        return AE_OK;
+                }
+
+        status = acpi_evaluate_integer(handle, "_GSB", NULL, &gsi_base);
+        if (ACPI_FAILURE(status)) {
+                acpi_handle_warn(handle, "failed to evaluate _GSB method\n");
+                goto exit;
+        }
+
+        ioapic = kzalloc(sizeof(*ioapic), GFP_KERNEL);
+        if (!ioapic) {
+                pr_err("cannot allocate memory for new IOAPIC\n");
+                goto exit;
+        } else {
+                ioapic->root_handle = (acpi_handle)context;
+                ioapic->handle = handle;
+                ioapic->gsi_base = (u32)gsi_base;
+                INIT_LIST_HEAD(&ioapic->list);
+        }
+
+        if (acpi_ioapic_registered(handle, (u32)gsi_base))
+                goto done;
+
+        dev = acpi_get_pci_dev(handle);
+        if (dev && pci_resource_len(dev, 0)) {
+                if (pci_enable_device(dev) < 0)
+                        goto exit_put;
+                pci_set_master(dev);
+                if (pci_request_region(dev, 0, type))
+                        goto exit_disable;
+                res = &dev->resource[0];
+                ioapic->pdev = dev;
+        } else {
+                pci_dev_put(dev);
+                dev = NULL;
+
+                res = &ioapic->res;
+                acpi_walk_resources(handle, METHOD_NAME__CRS, setup_res, res);
+                if (res->flags == 0) {
+                        acpi_handle_warn(handle, "failed to get resource\n");
+                        goto exit_free;
+                } else if (request_resource(&iomem_resource, res)) {
+                        acpi_handle_warn(handle, "failed to insert resource\n");
+                        goto exit_free;
+                }
+        }
+
+        if (acpi_register_ioapic(handle, res->start, (u32)gsi_base)) {
+                acpi_handle_warn(handle, "failed to register IOAPIC\n");
+                goto exit_release;
+        }
+done:
+        list_add(&ioapic->list, &ioapic_list);
+        mutex_unlock(&ioapic_list_lock);
+
+        if (dev)
+                dev_info(&dev->dev, "%s at %pR, GSI %u\n",
+                         type, res, (u32)gsi_base);
+        else
+                acpi_handle_info(handle, "%s at %pR, GSI %u\n",
+                                 type, res, (u32)gsi_base);
+
+        return AE_OK;
+
+exit_release:
+        if (dev)
+                pci_release_region(dev, 0);
+        else
+                release_resource(res);
+exit_disable:
+        if (dev)
+                pci_disable_device(dev);
+exit_put:
+        pci_dev_put(dev);
+exit_free:
+        kfree(ioapic);
+exit:
+        mutex_unlock(&ioapic_list_lock);
+        *(acpi_status *)rv = AE_ERROR;
+        return AE_OK;
+}
+
+int acpi_ioapic_add(struct acpi_pci_root *root)
+{
+        acpi_status status, retval = AE_OK;
+
+        status = acpi_walk_namespace(ACPI_TYPE_DEVICE, root->device->handle,
+                                     UINT_MAX, handle_ioapic_add, NULL,
+                                     root->device->handle, (void **)&retval);
+
+        return ACPI_SUCCESS(status) && ACPI_SUCCESS(retval) ? 0 : -ENODEV;
+}
+
+int acpi_ioapic_remove(struct acpi_pci_root *root)
+{
+        int retval = 0;
+        struct acpi_pci_ioapic *ioapic, *tmp;
+
+        mutex_lock(&ioapic_list_lock);
+        list_for_each_entry_safe(ioapic, tmp, &ioapic_list, list) {
+                if (root->device->handle != ioapic->root_handle)
+                        continue;
+
+                if (acpi_unregister_ioapic(ioapic->handle, ioapic->gsi_base))
+                        retval = -EBUSY;
+
+                if (ioapic->pdev) {
+                        pci_release_region(ioapic->pdev, 0);
+                        pci_disable_device(ioapic->pdev);
+                        pci_dev_put(ioapic->pdev);
+                } else if (ioapic->res.flags && ioapic->res.parent) {
+                        release_resource(&ioapic->res);
+                }
+                list_del(&ioapic->list);
+                kfree(ioapic);
+        }
+        mutex_unlock(&ioapic_list_lock);
+
+        return retval;
+}
diff --git a/drivers/acpi/numa.c b/drivers/acpi/numa.c
index 24b5476449a1..1333cbdc3ea2 100644
--- a/drivers/acpi/numa.c
+++ b/drivers/acpi/numa.c
@@ -177,12 +177,7 @@ static int __init slit_valid(struct acpi_table_slit *slit)
 
 static int __init acpi_parse_slit(struct acpi_table_header *table)
 {
-        struct acpi_table_slit *slit;
-
-        if (!table)
-                return -EINVAL;
-
-        slit = (struct acpi_table_slit *)table;
+        struct acpi_table_slit *slit = (struct acpi_table_slit *)table;
 
         if (!slit_valid(slit)) {
                 printk(KERN_INFO "ACPI: SLIT table looks invalid. Not used.\n");
@@ -260,11 +255,8 @@ acpi_parse_memory_affinity(struct acpi_subtable_header * header,
 
 static int __init acpi_parse_srat(struct acpi_table_header *table)
 {
-        struct acpi_table_srat *srat;
-        if (!table)
-                return -EINVAL;
+        struct acpi_table_srat *srat = (struct acpi_table_srat *)table;
 
-        srat = (struct acpi_table_srat *)table;
         acpi_srat_revision = srat->header.revision;
 
         /* Real work done in acpi_table_parse_srat below. */
diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c
index b1def411c0b8..e7f718d6918a 100644
--- a/drivers/acpi/pci_irq.c
+++ b/drivers/acpi/pci_irq.c
@@ -485,14 +485,6 @@ void acpi_pci_irq_disable(struct pci_dev *dev)
         if (!pin || !dev->irq_managed || dev->irq <= 0)
                 return;
 
-        /* Keep IOAPIC pin configuration when suspending */
-        if (dev->dev.power.is_prepared)
-                return;
-#ifdef  CONFIG_PM
-        if (dev->dev.power.runtime_status == RPM_SUSPENDING)
-                return;
-#endif
-
         entry = acpi_pci_irq_lookup(dev, pin);
         if (!entry)
                 return;
@@ -513,5 +505,6 @@ void acpi_pci_irq_disable(struct pci_dev *dev)
         if (gsi >= 0) {
                 acpi_unregister_gsi(gsi);
                 dev->irq_managed = 0;
+                dev->irq = 0;
         }
 }
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index c6bcb8c719d8..68a5f712cd19 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -112,10 +112,10 @@ get_root_bridge_busnr_callback(struct acpi_resource *resource, void *data)
         if (ACPI_FAILURE(status))
                 return AE_OK;
 
-        if ((address.address_length > 0) &&
+        if ((address.address.address_length > 0) &&
             (address.resource_type == ACPI_BUS_NUMBER_RANGE)) {
-                res->start = address.minimum;
-                res->end = address.minimum + address.address_length - 1;
+                res->start = address.address.minimum;
+                res->end = address.address.minimum + address.address.address_length - 1;
         }
 
         return AE_OK;
@@ -621,6 +621,7 @@ static int acpi_pci_root_add(struct acpi_device *device,
         if (hotadd) {
                 pcibios_resource_survey_bus(root->bus);
                 pci_assign_unassigned_root_bus_resources(root->bus);
+                acpi_ioapic_add(root);
         }
 
         pci_lock_rescan_remove();
@@ -644,6 +645,8 @@ static void acpi_pci_root_remove(struct acpi_device *device)
 
         pci_stop_root_bus(root->bus);
 
+        WARN_ON(acpi_ioapic_remove(root));
+
         device_set_run_wake(root->bus->bridge, false);
         pci_acpi_remove_bus_pm_notifier(device);
 
diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index 02e48394276c..7962651cdbd4 100644
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -4,6 +4,10 @@
  *
  *      Alex Chiang <achiang@hp.com>
  *      - Unified x86/ia64 implementations
+ *
+ * I/O APIC hotplug support
+ *      Yinghai Lu <yinghai@kernel.org>
+ *      Jiang Liu <jiang.liu@intel.com>
  */
 #include <linux/export.h>
 #include <linux/acpi.h>
@@ -12,6 +16,21 @@
 #define _COMPONENT              ACPI_PROCESSOR_COMPONENT
 ACPI_MODULE_NAME("processor_core");
 
+static struct acpi_table_madt *get_madt_table(void)
+{
+        static struct acpi_table_madt *madt;
+        static int read_madt;
+
+        if (!read_madt) {
+                if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0,
+                                        (struct acpi_table_header **)&madt)))
+                        madt = NULL;
+                read_madt++;
+        }
+
+        return madt;
+}
+
 static int map_lapic_id(struct acpi_subtable_header *entry,
                  u32 acpi_id, int *apic_id)
 {
@@ -67,17 +86,10 @@ static int map_lsapic_id(struct acpi_subtable_header *entry,
 static int map_madt_entry(int type, u32 acpi_id)
 {
         unsigned long madt_end, entry;
-        static struct acpi_table_madt *madt;
-        static int read_madt;
         int phys_id = -1;       /* CPU hardware ID */
+        struct acpi_table_madt *madt;
 
-        if (!read_madt) {
-                if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0,
-                                        (struct acpi_table_header **)&madt)))
-                        madt = NULL;
-                read_madt++;
-        }
-
+        madt = get_madt_table();
         if (!madt)
                 return phys_id;
 
@@ -203,3 +215,96 @@ int acpi_get_cpuid(acpi_handle handle, int type, u32 acpi_id)
         return acpi_map_cpuid(phys_id, acpi_id);
 }
 EXPORT_SYMBOL_GPL(acpi_get_cpuid);
+
+#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
+static int get_ioapic_id(struct acpi_subtable_header *entry, u32 gsi_base,
+                         u64 *phys_addr, int *ioapic_id)
+{
+        struct acpi_madt_io_apic *ioapic = (struct acpi_madt_io_apic *)entry;
+
+        if (ioapic->global_irq_base != gsi_base)
+                return 0;
+
+        *phys_addr = ioapic->address;
+        *ioapic_id = ioapic->id;
+        return 1;
+}
+
+static int parse_madt_ioapic_entry(u32 gsi_base, u64 *phys_addr)
+{
+        struct acpi_subtable_header *hdr;
+        unsigned long madt_end, entry;
+        struct acpi_table_madt *madt;
+        int apic_id = -1;
+
+        madt = get_madt_table();
+        if (!madt)
+                return apic_id;
+
+        entry = (unsigned long)madt;
+        madt_end = entry + madt->header.length;
+
+        /* Parse all entries looking for a match. */
+        entry += sizeof(struct acpi_table_madt);
+        while (entry + sizeof(struct acpi_subtable_header) < madt_end) {
+                hdr = (struct acpi_subtable_header *)entry;
+                if (hdr->type == ACPI_MADT_TYPE_IO_APIC &&
+                    get_ioapic_id(hdr, gsi_base, phys_addr, &apic_id))
+                        break;
+                else
+                        entry += hdr->length;
+        }
+
+        return apic_id;
+}
+
+static int parse_mat_ioapic_entry(acpi_handle handle, u32 gsi_base,
+                                  u64 *phys_addr)
+{
+        struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+        struct acpi_subtable_header *header;
+        union acpi_object *obj;
+        int apic_id = -1;
+
+        if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
+                goto exit;
+
+        if (!buffer.length || !buffer.pointer)
+                goto exit;
+
+        obj = buffer.pointer;
+        if (obj->type != ACPI_TYPE_BUFFER ||
+            obj->buffer.length < sizeof(struct acpi_subtable_header))
+                goto exit;
+
+        header = (struct acpi_subtable_header *)obj->buffer.pointer;
+        if (header->type == ACPI_MADT_TYPE_IO_APIC)
+                get_ioapic_id(header, gsi_base, phys_addr, &apic_id);
+
+exit:
+        kfree(buffer.pointer);
+        return apic_id;
+}
+
+/**
+ * acpi_get_ioapic_id - Get IOAPIC ID and physical address matching @gsi_base
+ * @handle:     ACPI object for IOAPIC device
+ * @gsi_base:   GSI base to match with
+ * @phys_addr:  Pointer to store physical address of matching IOAPIC record
+ *
+ * Walk resources returned by ACPI_MAT method, then ACPI MADT table, to search
+ * for an ACPI IOAPIC record matching @gsi_base.
+ * Return IOAPIC id and store physical address in @phys_addr if found a match,
+ * otherwise return <0.
+ */
+int acpi_get_ioapic_id(acpi_handle handle, u32 gsi_base, u64 *phys_addr)
+{
+        int apic_id;
+
+        apic_id = parse_mat_ioapic_entry(handle, gsi_base, phys_addr);
+        if (apic_id == -1)
+                apic_id = parse_madt_ioapic_entry(gsi_base, phys_addr);
+
+        return apic_id;
+}
+#endif /* CONFIG_ACPI_HOTPLUG_IOAPIC */
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 87b704e41877..c256bd7fbd78 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -681,15 +681,13 @@ static int acpi_idle_bm_check(void)
 }
 
 /**
- * acpi_idle_do_entry - a helper function that does C2 and C3 type entry
+ * acpi_idle_do_entry - enter idle state using the appropriate method
  * @cx: cstate data
  *
  * Caller disables interrupt before call and enables interrupt after return.
  */
-static inline void acpi_idle_do_entry(struct acpi_processor_cx *cx)
+static void acpi_idle_do_entry(struct acpi_processor_cx *cx)
 {
-        /* Don't trace irqs off for idle */
-        stop_critical_timings();
         if (cx->entry_method == ACPI_CSTATE_FFH) {
                 /* Call into architectural FFH based C-state */
                 acpi_processor_ffh_cstate_enter(cx);
@@ -703,38 +701,9 @@ static inline void acpi_idle_do_entry(struct acpi_processor_cx *cx)
                    gets asserted in time to freeze execution properly. */
                 inl(acpi_gbl_FADT.xpm_timer_block.address);
         }
-        start_critical_timings();
 }
 
 /**
- * acpi_idle_enter_c1 - enters an ACPI C1 state-type
- * @dev: the target CPU
- * @drv: cpuidle driver containing cpuidle state info
- * @index: index of target state
- *
- * This is equivalent to the HALT instruction.
- */
-static int acpi_idle_enter_c1(struct cpuidle_device *dev,
-                struct cpuidle_driver *drv, int index)
-{
-        struct acpi_processor *pr;
-        struct acpi_processor_cx *cx = per_cpu(acpi_cstate[index], dev->cpu);
-
-        pr = __this_cpu_read(processors);
-
-        if (unlikely(!pr))
-                return -EINVAL;
-
-        lapic_timer_state_broadcast(pr, cx, 1);
-        acpi_idle_do_entry(cx);
-
-        lapic_timer_state_broadcast(pr, cx, 0);
-
-        return index;
-}
-
-
-/**
  * acpi_idle_play_dead - enters an ACPI state for long-term idle (i.e. off-lining)
  * @dev: the target CPU
  * @index: the index of suggested state
@@ -761,47 +730,11 @@ static int acpi_idle_play_dead(struct cpuidle_device *dev, int index)
         return 0;
 }
 
-/**
- * acpi_idle_enter_simple - enters an ACPI state without BM handling
- * @dev: the target CPU
- * @drv: cpuidle driver with cpuidle state information
- * @index: the index of suggested state
- */
-static int acpi_idle_enter_simple(struct cpuidle_device *dev,
-                struct cpuidle_driver *drv, int index)
+static bool acpi_idle_fallback_to_c1(struct acpi_processor *pr)
 {
-        struct acpi_processor *pr;
-        struct acpi_processor_cx *cx = per_cpu(acpi_cstate[index], dev->cpu);
-
-        pr = __this_cpu_read(processors);
-
-        if (unlikely(!pr))
-                return -EINVAL;
-
-#ifdef CONFIG_HOTPLUG_CPU
-        if ((cx->type != ACPI_STATE_C1) && (num_online_cpus() > 1) &&
-            !pr->flags.has_cst &&
-            !(acpi_gbl_FADT.flags & ACPI_FADT_C2_MP_SUPPORTED))
-                return acpi_idle_enter_c1(dev, drv, CPUIDLE_DRIVER_STATE_START);
-#endif
-
-        /*
-         * Must be done before busmaster disable as we might need to
-         * access HPET !
-         */
-        lapic_timer_state_broadcast(pr, cx, 1);
-
-        if (cx->type == ACPI_STATE_C3)
-                ACPI_FLUSH_CPU_CACHE();
-
-        /* Tell the scheduler that we are going deep-idle: */
-        sched_clock_idle_sleep_event();
-        acpi_idle_do_entry(cx);
-
-        sched_clock_idle_wakeup_event(0);
-
-        lapic_timer_state_broadcast(pr, cx, 0);
-        return index;
+        return IS_ENABLED(CONFIG_HOTPLUG_CPU) && num_online_cpus() > 1 &&
+                !(acpi_gbl_FADT.flags & ACPI_FADT_C2_MP_SUPPORTED) &&
+                !pr->flags.has_cst;
 }
 
 static int c3_cpu_count;
@@ -809,44 +742,14 @@ static DEFINE_RAW_SPINLOCK(c3_lock);
 
 /**
  * acpi_idle_enter_bm - enters C3 with proper BM handling
- * @dev: the target CPU
- * @drv: cpuidle driver containing state data
- * @index: the index of suggested state
- *
- * If BM is detected, the deepest non-C3 idle state is entered instead.
+ * @pr: Target processor
+ * @cx: Target state context
  */
-static int acpi_idle_enter_bm(struct cpuidle_device *dev,
-                struct cpuidle_driver *drv, int index)
+static void acpi_idle_enter_bm(struct acpi_processor *pr,
+                               struct acpi_processor_cx *cx)
 {
-        struct acpi_processor *pr;
-        struct acpi_processor_cx *cx = per_cpu(acpi_cstate[index], dev->cpu);
-
-        pr = __this_cpu_read(processors);
-
-        if (unlikely(!pr))
-                return -EINVAL;
-
-#ifdef CONFIG_HOTPLUG_CPU
-        if ((cx->type != ACPI_STATE_C1) && (num_online_cpus() > 1) &&
-            !pr->flags.has_cst &&
-            !(acpi_gbl_FADT.flags & ACPI_FADT_C2_MP_SUPPORTED))
-                return acpi_idle_enter_c1(dev, drv, CPUIDLE_DRIVER_STATE_START);
-#endif
-
-        if (!cx->bm_sts_skip && acpi_idle_bm_check()) {
-                if (drv->safe_state_index >= 0) {
-                        return drv->states[drv->safe_state_index].enter(dev,
-                                                drv, drv->safe_state_index);
-                } else {
-                        acpi_safe_halt();
-                        return -EBUSY;
-                }
-        }
-
         acpi_unlazy_tlb(smp_processor_id());
 
-        /* Tell the scheduler that we are going deep-idle: */
-        sched_clock_idle_sleep_event();
         /*
          * Must be done before busmaster disable as we might need to
          * access HPET !
@@ -856,37 +759,71 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
         /*
          * disable bus master
          * bm_check implies we need ARB_DIS
-         * !bm_check implies we need cache flush
          * bm_control implies whether we can do ARB_DIS
          *
          * That leaves a case where bm_check is set and bm_control is
          * not set. In that case we cannot do much, we enter C3
          * without doing anything.
          */
-        if (pr->flags.bm_check && pr->flags.bm_control) {
+        if (pr->flags.bm_control) {
                 raw_spin_lock(&c3_lock);
                 c3_cpu_count++;
                 /* Disable bus master arbitration when all CPUs are in C3 */
                 if (c3_cpu_count == num_online_cpus())
                         acpi_write_bit_register(ACPI_BITREG_ARB_DISABLE, 1);
                 raw_spin_unlock(&c3_lock);
-        } else if (!pr->flags.bm_check) {
-                ACPI_FLUSH_CPU_CACHE();
         }
 
         acpi_idle_do_entry(cx);
 
         /* Re-enable bus master arbitration */
-        if (pr->flags.bm_check && pr->flags.bm_control) {
+        if (pr->flags.bm_control) {
                 raw_spin_lock(&c3_lock);
                 acpi_write_bit_register(ACPI_BITREG_ARB_DISABLE, 0);
                 c3_cpu_count--;
                 raw_spin_unlock(&c3_lock);
         }
 
-        sched_clock_idle_wakeup_event(0);
+        lapic_timer_state_broadcast(pr, cx, 0);
+}
+
+static int acpi_idle_enter(struct cpuidle_device *dev,
+                           struct cpuidle_driver *drv, int index)
+{
+        struct acpi_processor_cx *cx = per_cpu(acpi_cstate[index], dev->cpu);
+        struct acpi_processor *pr;
+
+        pr = __this_cpu_read(processors);
+        if (unlikely(!pr))
+                return -EINVAL;
+
+        if (cx->type != ACPI_STATE_C1) {
+                if (acpi_idle_fallback_to_c1(pr)) {
+                        index = CPUIDLE_DRIVER_STATE_START;
+                        cx = per_cpu(acpi_cstate[index], dev->cpu);
+                } else if (cx->type == ACPI_STATE_C3 && pr->flags.bm_check) {
+                        if (cx->bm_sts_skip || !acpi_idle_bm_check()) {
+                                acpi_idle_enter_bm(pr, cx);
+                                return index;
+                        } else if (drv->safe_state_index >= 0) {
+                                index = drv->safe_state_index;
+                                cx = per_cpu(acpi_cstate[index], dev->cpu);
+                        } else {
+                                acpi_safe_halt();
+                                return -EBUSY;
+                        }
+                }
+        }
+
+        lapic_timer_state_broadcast(pr, cx, 1);
+
+        if (cx->type == ACPI_STATE_C3)
+                ACPI_FLUSH_CPU_CACHE();
+
+        acpi_idle_do_entry(cx);
 
         lapic_timer_state_broadcast(pr, cx, 0);
+
         return index;
 }
 
@@ -981,27 +918,12 @@ static int acpi_processor_setup_cpuidle_states(struct acpi_processor *pr)
                 strncpy(state->desc, cx->desc, CPUIDLE_DESC_LEN);
                 state->exit_latency = cx->latency;
                 state->target_residency = cx->latency * latency_factor;
+                state->enter = acpi_idle_enter;
 
                 state->flags = 0;
-                switch (cx->type) {
-                        case ACPI_STATE_C1:
-
-                        state->enter = acpi_idle_enter_c1;
-                        state->enter_dead = acpi_idle_play_dead;
-                        drv->safe_state_index = count;
-                        break;
-
-                        case ACPI_STATE_C2:
-                        state->enter = acpi_idle_enter_simple;
+                if (cx->type == ACPI_STATE_C1 || cx->type == ACPI_STATE_C2) {
                         state->enter_dead = acpi_idle_play_dead;
                         drv->safe_state_index = count;
-                        break;
-
-                        case ACPI_STATE_C3:
-                        state->enter = pr->flags.bm_check ?
-                                        acpi_idle_enter_bm :
-                                        acpi_idle_enter_simple;
-                        break;
                 }
 
                 count++;
diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
index 782a0d15c25f..4752b9939987 100644
--- a/drivers/acpi/resource.c
+++ b/drivers/acpi/resource.c
@@ -34,21 +34,34 @@
 #define valid_IRQ(i) (true)
 #endif
 
-static unsigned long acpi_dev_memresource_flags(u64 len, u8 write_protect,
-                                                bool window)
+static bool acpi_dev_resource_len_valid(u64 start, u64 end, u64 len, bool io)
 {
-        unsigned long flags = IORESOURCE_MEM;
+        u64 reslen = end - start + 1;
 
-        if (len == 0)
-                flags |= IORESOURCE_DISABLED;
+        /*
+         * CHECKME: len might be required to check versus a minimum
+         * length as well. 1 for io is fine, but for memory it does
+         * not make any sense at all.
+         */
+        if (len && reslen && reslen == len && start <= end)
+                return true;
 
-        if (write_protect == ACPI_READ_WRITE_MEMORY)
-                flags |= IORESOURCE_MEM_WRITEABLE;
+        pr_info("ACPI: invalid or unassigned resource %s [%016llx - %016llx] length [%016llx]\n",
+                io ? "io" : "mem", start, end, len);
+
+        return false;
+}
+
+static void acpi_dev_memresource_flags(struct resource *res, u64 len,
+                                       u8 write_protect)
+{
+        res->flags = IORESOURCE_MEM;
 
-        if (window)
-                flags |= IORESOURCE_WINDOW;
+        if (!acpi_dev_resource_len_valid(res->start, res->end, len, false))
+                res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET;
 
-        return flags;
+        if (write_protect == ACPI_READ_WRITE_MEMORY)
+                res->flags |= IORESOURCE_MEM_WRITEABLE;
 }
 
 static void acpi_dev_get_memresource(struct resource *res, u64 start, u64 len,
@@ -56,7 +69,7 @@ static void acpi_dev_get_memresource(struct resource *res, u64 start, u64 len,
 {
         res->start = start;
         res->end = start + len - 1;
-        res->flags = acpi_dev_memresource_flags(len, write_protect, false);
+        acpi_dev_memresource_flags(res, len, write_protect);
 }
 
 /**
@@ -67,6 +80,11 @@ static void acpi_dev_get_memresource(struct resource *res, u64 start, u64 len,
  * Check if the given ACPI resource object represents a memory resource and
  * if that's the case, use the information in it to populate the generic
  * resource object pointed to by @res.
+ *
+ * Return:
+ * 1) false with res->flags setting to zero: not the expected resource type
+ * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource
+ * 3) true: valid assigned resource
  */
 bool acpi_dev_resource_memory(struct acpi_resource *ares, struct resource *res)
 {
@@ -77,60 +95,52 @@ bool acpi_dev_resource_memory(struct acpi_resource *ares, struct resource *res)
         switch (ares->type) {
         case ACPI_RESOURCE_TYPE_MEMORY24:
                 memory24 = &ares->data.memory24;
-                if (!memory24->minimum && !memory24->address_length)
-                        return false;
-                acpi_dev_get_memresource(res, memory24->minimum,
-                                         memory24->address_length,
+                acpi_dev_get_memresource(res, memory24->minimum << 8,
+                                         memory24->address_length << 8,
                                          memory24->write_protect);
                 break;
         case ACPI_RESOURCE_TYPE_MEMORY32:
                 memory32 = &ares->data.memory32;
-                if (!memory32->minimum && !memory32->address_length)
-                        return false;
                 acpi_dev_get_memresource(res, memory32->minimum,
                                          memory32->address_length,
                                          memory32->write_protect);
                 break;
         case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
                 fixed_memory32 = &ares->data.fixed_memory32;
-                if (!fixed_memory32->address && !fixed_memory32->address_length)
-                        return false;
                 acpi_dev_get_memresource(res, fixed_memory32->address,
                                          fixed_memory32->address_length,
                                          fixed_memory32->write_protect);
                 break;
         default:
+                res->flags = 0;
                 return false;
         }
-        return true;
+
+        return !(res->flags & IORESOURCE_DISABLED);
 }
 EXPORT_SYMBOL_GPL(acpi_dev_resource_memory);
 
-static unsigned int acpi_dev_ioresource_flags(u64 start, u64 end, u8 io_decode,
-                                              bool window)
+static void acpi_dev_ioresource_flags(struct resource *res, u64 len,
+                                      u8 io_decode)
 {
-        int flags = IORESOURCE_IO;
+        res->flags = IORESOURCE_IO;
 
-        if (io_decode == ACPI_DECODE_16)
-                flags |= IORESOURCE_IO_16BIT_ADDR;
+        if (!acpi_dev_resource_len_valid(res->start, res->end, len, true))
+                res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET;
 
-        if (start > end || end >= 0x10003)
-                flags |= IORESOURCE_DISABLED;
+        if (res->end >= 0x10003)
+                res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET;
 
-        if (window)
-                flags |= IORESOURCE_WINDOW;
-
-        return flags;
+        if (io_decode == ACPI_DECODE_16)
+                res->flags |= IORESOURCE_IO_16BIT_ADDR;
 }
 
 static void acpi_dev_get_ioresource(struct resource *res, u64 start, u64 len,
                                     u8 io_decode)
 {
-        u64 end = start + len - 1;
-
         res->start = start;
-        res->end = end;
-        res->flags = acpi_dev_ioresource_flags(start, end, io_decode, false);
+        res->end = start + len - 1;
+        acpi_dev_ioresource_flags(res, len, io_decode);
 }
 
 /**
@@ -141,6 +151,11 @@ static void acpi_dev_get_ioresource(struct resource *res, u64 start, u64 len,
  * Check if the given ACPI resource object represents an I/O resource and
  * if that's the case, use the information in it to populate the generic
  * resource object pointed to by @res.
+ *
+ * Return:
+ * 1) false with res->flags setting to zero: not the expected resource type
+ * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource
+ * 3) true: valid assigned resource
  */
 bool acpi_dev_resource_io(struct acpi_resource *ares, struct resource *res)
 {
@@ -150,135 +165,143 @@ bool acpi_dev_resource_io(struct acpi_resource *ares, struct resource *res)
         switch (ares->type) {
         case ACPI_RESOURCE_TYPE_IO:
                 io = &ares->data.io;
-                if (!io->minimum && !io->address_length)
-                        return false;
                 acpi_dev_get_ioresource(res, io->minimum,
                                         io->address_length,
                                         io->io_decode);
                 break;
         case ACPI_RESOURCE_TYPE_FIXED_IO:
                 fixed_io = &ares->data.fixed_io;
-                if (!fixed_io->address && !fixed_io->address_length)
-                        return false;
                 acpi_dev_get_ioresource(res, fixed_io->address,
                                         fixed_io->address_length,
                                         ACPI_DECODE_10);
                 break;
         default:
+                res->flags = 0;
                 return false;
         }
-        return true;
+
+        return !(res->flags & IORESOURCE_DISABLED);
 }
 EXPORT_SYMBOL_GPL(acpi_dev_resource_io);
 
-/**
- * acpi_dev_resource_address_space - Extract ACPI address space information.
- * @ares: Input ACPI resource object.
- * @res: Output generic resource object.
- *
- * Check if the given ACPI resource object represents an address space resource
- * and if that's the case, use the information in it to populate the generic
- * resource object pointed to by @res.
- */
-bool acpi_dev_resource_address_space(struct acpi_resource *ares,
-                                     struct resource *res)
+static bool acpi_decode_space(struct resource_win *win,
+                              struct acpi_resource_address *addr,
+                              struct acpi_address64_attribute *attr)
 {
-        acpi_status status;
-        struct acpi_resource_address64 addr;
-        bool window;
-        u64 len;
-        u8 io_decode;
+        u8 iodec = attr->granularity == 0xfff ? ACPI_DECODE_10 : ACPI_DECODE_16;
+        bool wp = addr->info.mem.write_protect;
+        u64 len = attr->address_length;
+        struct resource *res = &win->res;
 
-        switch (ares->type) {
-        case ACPI_RESOURCE_TYPE_ADDRESS16:
-        case ACPI_RESOURCE_TYPE_ADDRESS32:
-        case ACPI_RESOURCE_TYPE_ADDRESS64:
-                break;
-        default:
-                return false;
-        }
+        /*
+         * Filter out invalid descriptor according to ACPI Spec 5.0, section
+         * 6.4.3.5 Address Space Resource Descriptors.
+         */
+        if ((addr->min_address_fixed != addr->max_address_fixed && len) ||
+            (addr->min_address_fixed && addr->max_address_fixed && !len))
+                pr_debug("ACPI: Invalid address space min_addr_fix %d, max_addr_fix %d, len %llx\n",
+                         addr->min_address_fixed, addr->max_address_fixed, len);
 
-        status = acpi_resource_to_address64(ares, &addr);
-        if (ACPI_FAILURE(status))
-                return false;
+        res->start = attr->minimum;
+        res->end = attr->maximum;
 
-        res->start = addr.minimum;
-        res->end = addr.maximum;
-        window = addr.producer_consumer == ACPI_PRODUCER;
+        /*
+         * For bridges that translate addresses across the bridge,
+         * translation_offset is the offset that must be added to the
+         * address on the secondary side to obtain the address on the
+         * primary side. Non-bridge devices must list 0 for all Address
+         * Translation offset bits.
+         */
+        if (addr->producer_consumer == ACPI_PRODUCER) {
+                res->start += attr->translation_offset;
+                res->end += attr->translation_offset;
+        } else if (attr->translation_offset) {
+                pr_debug("ACPI: translation_offset(%lld) is invalid for non-bridge device.\n",
+                         attr->translation_offset);
+        }
 
-        switch(addr.resource_type) {
+        switch (addr->resource_type) {
         case ACPI_MEMORY_RANGE:
-                len = addr.maximum - addr.minimum + 1;
-                res->flags = acpi_dev_memresource_flags(len,
-                                                addr.info.mem.write_protect,
-                                                window);
+                acpi_dev_memresource_flags(res, len, wp);
                 break;
         case ACPI_IO_RANGE:
-                io_decode = addr.granularity == 0xfff ?
-                                ACPI_DECODE_10 : ACPI_DECODE_16;
-                res->flags = acpi_dev_ioresource_flags(addr.minimum,
-                                                       addr.maximum,
-                                                       io_decode, window);
+                acpi_dev_ioresource_flags(res, len, iodec);
                 break;
         case ACPI_BUS_NUMBER_RANGE:
                 res->flags = IORESOURCE_BUS;
                 break;
         default:
-                res->flags = 0;
+                return false;
         }
 
-        return true;
+        win->offset = attr->translation_offset;
+
+        if (addr->producer_consumer == ACPI_PRODUCER)
+                res->flags |= IORESOURCE_WINDOW;
+
+        if (addr->info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
+                res->flags |= IORESOURCE_PREFETCH;
+
+        return !(res->flags & IORESOURCE_DISABLED);
+}
+
+/**
+ * acpi_dev_resource_address_space - Extract ACPI address space information.
+ * @ares: Input ACPI resource object.
+ * @win: Output generic resource object.
+ *
+ * Check if the given ACPI resource object represents an address space resource
+ * and if that's the case, use the information in it to populate the generic
+ * resource object pointed to by @win.
+ *
+ * Return:
+ * 1) false with win->res.flags setting to zero: not the expected resource type
+ * 2) false with IORESOURCE_DISABLED in win->res.flags: valid unassigned
+ *    resource
+ * 3) true: valid assigned resource
+ */
+bool acpi_dev_resource_address_space(struct acpi_resource *ares,
+                                     struct resource_win *win)
+{
+        struct acpi_resource_address64 addr;
+
+        win->res.flags = 0;
+        if (ACPI_FAILURE(acpi_resource_to_address64(ares, &addr)))
+                return false;
+
+        return acpi_decode_space(win, (struct acpi_resource_address *)&addr,
+                                 &addr.address);
 }
 EXPORT_SYMBOL_GPL(acpi_dev_resource_address_space);
 
 /**
  * acpi_dev_resource_ext_address_space - Extract ACPI address space information.
  * @ares: Input ACPI resource object.
- * @res: Output generic resource object.
+ * @win: Output generic resource object.
  *
  * Check if the given ACPI resource object represents an extended address space
  * resource and if that's the case, use the information in it to populate the
- * generic resource object pointed to by @res.
+ * generic resource object pointed to by @win.
+ *
+ * Return:
+ * 1) false with win->res.flags setting to zero: not the expected resource type
+ * 2) false with IORESOURCE_DISABLED in win->res.flags: valid unassigned
+ *    resource
+ * 3) true: valid assigned resource
  */
 bool acpi_dev_resource_ext_address_space(struct acpi_resource *ares,
-                                         struct resource *res)
+                                         struct resource_win *win)
 {
         struct acpi_resource_extended_address64 *ext_addr;
-        bool window;
-        u64 len;
-        u8 io_decode;
 
+        win->res.flags = 0;
         if (ares->type != ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64)
                 return false;
 
         ext_addr = &ares->data.ext_address64;
 
-        res->start = ext_addr->minimum;
-        res->end = ext_addr->maximum;
-        window = ext_addr->producer_consumer == ACPI_PRODUCER;
-
-        switch(ext_addr->resource_type) {
-        case ACPI_MEMORY_RANGE:
-                len = ext_addr->maximum - ext_addr->minimum + 1;
-                res->flags = acpi_dev_memresource_flags(len,
-                                        ext_addr->info.mem.write_protect,
-                                        window);
-                break;
-        case ACPI_IO_RANGE:
-                io_decode = ext_addr->granularity == 0xfff ?
-                                ACPI_DECODE_10 : ACPI_DECODE_16;
-                res->flags = acpi_dev_ioresource_flags(ext_addr->minimum,
-                                                       ext_addr->maximum,
-                                                       io_decode, window);
-                break;
-        case ACPI_BUS_NUMBER_RANGE:
-                res->flags = IORESOURCE_BUS;
-                break;
-        default:
-                res->flags = 0;
-        }
-
-        return true;
+        return acpi_decode_space(win, (struct acpi_resource_address *)ext_addr,
+                                 &ext_addr->address);
 }
 EXPORT_SYMBOL_GPL(acpi_dev_resource_ext_address_space);
 
@@ -310,7 +333,7 @@ static void acpi_dev_irqresource_disabled(struct resource *res, u32 gsi)
 {
         res->start = gsi;
         res->end = gsi;
-        res->flags = IORESOURCE_IRQ | IORESOURCE_DISABLED;
+        res->flags = IORESOURCE_IRQ | IORESOURCE_DISABLED | IORESOURCE_UNSET;
 }
 
 static void acpi_dev_get_irqresource(struct resource *res, u32 gsi,
@@ -369,6 +392,11 @@ static void acpi_dev_get_irqresource(struct resource *res, u32 gsi,
  * represented by the resource and populate the generic resource object pointed
  * to by @res accordingly.  If the registration of the GSI is not successful,
  * IORESOURCE_DISABLED will be set it that object's flags.
+ *
+ * Return:
+ * 1) false with res->flags setting to zero: not the expected resource type
+ * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource
+ * 3) true: valid assigned resource
  */
 bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index,
                                  struct resource *res)
@@ -402,6 +430,7 @@ bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index,
                                          ext_irq->sharable, false);
                 break;
         default:
+                res->flags = 0;
                 return false;
         }
 
@@ -415,12 +444,7 @@ EXPORT_SYMBOL_GPL(acpi_dev_resource_interrupt);
  */
 void acpi_dev_free_resource_list(struct list_head *list)
 {
-        struct resource_list_entry *rentry, *re;
-
-        list_for_each_entry_safe(rentry, re, list, node) {
-                list_del(&rentry->node);
-                kfree(rentry);
-        }
+        resource_list_free(list);
 }
 EXPORT_SYMBOL_GPL(acpi_dev_free_resource_list);
 
@@ -432,18 +456,19 @@ struct res_proc_context {
         int error;
 };
 
-static acpi_status acpi_dev_new_resource_entry(struct resource *r,
+static acpi_status acpi_dev_new_resource_entry(struct resource_win *win,
                                                struct res_proc_context *c)
 {
-        struct resource_list_entry *rentry;
+        struct resource_entry *rentry;
 
-        rentry = kmalloc(sizeof(*rentry), GFP_KERNEL);
+        rentry = resource_list_create_entry(NULL, 0);
         if (!rentry) {
                 c->error = -ENOMEM;
                 return AE_NO_MEMORY;
         }
-        rentry->res = *r;
-        list_add_tail(&rentry->node, c->list);
+        *rentry->res = win->res;
+        rentry->offset = win->offset;
+        resource_list_add_tail(rentry, c->list);
         c->count++;
         return AE_OK;
 }
@@ -452,7 +477,8 @@ static acpi_status acpi_dev_process_resource(struct acpi_resource *ares,
                                              void *context)
 {
         struct res_proc_context *c = context;
-        struct resource r;
+        struct resource_win win;
+        struct resource *res = &win.res;
         int i;
 
         if (c->preproc) {
@@ -467,18 +493,18 @@ static acpi_status acpi_dev_process_resource(struct acpi_resource *ares,
                 }
         }
 
-        memset(&r, 0, sizeof(r));
+        memset(&win, 0, sizeof(win));
 
-        if (acpi_dev_resource_memory(ares, &r)
-            || acpi_dev_resource_io(ares, &r)
-            || acpi_dev_resource_address_space(ares, &r)
-            || acpi_dev_resource_ext_address_space(ares, &r))
-                return acpi_dev_new_resource_entry(&r, c);
+        if (acpi_dev_resource_memory(ares, res)
+            || acpi_dev_resource_io(ares, res)
+            || acpi_dev_resource_address_space(ares, &win)
+            || acpi_dev_resource_ext_address_space(ares, &win))
+                return acpi_dev_new_resource_entry(&win, c);
 
-        for (i = 0; acpi_dev_resource_interrupt(ares, i, &r); i++) {
+        for (i = 0; acpi_dev_resource_interrupt(ares, i, res); i++) {
                 acpi_status status;
 
-                status = acpi_dev_new_resource_entry(&r, c);
+                status = acpi_dev_new_resource_entry(&win, c);
                 if (ACPI_FAILURE(status))
                         return status;
         }
@@ -503,7 +529,7 @@ static acpi_status acpi_dev_process_resource(struct acpi_resource *ares,
  * returned as the final error code.
  *
  * The resultant struct resource objects are put on the list pointed to by
- * @list, that must be empty initially, as members of struct resource_list_entry
+ * @list, that must be empty initially, as members of struct resource_entry
  * objects.  Callers of this routine should use %acpi_dev_free_resource_list() to
  * free that list.
  *
@@ -538,3 +564,58 @@ int acpi_dev_get_resources(struct acpi_device *adev, struct list_head *list,
         return c.count;
 }
 EXPORT_SYMBOL_GPL(acpi_dev_get_resources);
+
+/**
+ * acpi_dev_filter_resource_type - Filter ACPI resource according to resource
+ *                                 types
+ * @ares: Input ACPI resource object.
+ * @types: Valid resource types of IORESOURCE_XXX
+ *
+ * This is a hepler function to support acpi_dev_get_resources(), which filters
+ * ACPI resource objects according to resource types.
+ */
+int acpi_dev_filter_resource_type(struct acpi_resource *ares,
+                                  unsigned long types)
+{
+        unsigned long type = 0;
+
+        switch (ares->type) {
+        case ACPI_RESOURCE_TYPE_MEMORY24:
+        case ACPI_RESOURCE_TYPE_MEMORY32:
+        case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
+                type = IORESOURCE_MEM;
+                break;
+        case ACPI_RESOURCE_TYPE_IO:
+        case ACPI_RESOURCE_TYPE_FIXED_IO:
+                type = IORESOURCE_IO;
+                break;
+        case ACPI_RESOURCE_TYPE_IRQ:
+        case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
+                type = IORESOURCE_IRQ;
+                break;
+        case ACPI_RESOURCE_TYPE_DMA:
+        case ACPI_RESOURCE_TYPE_FIXED_DMA:
+                type = IORESOURCE_DMA;
+                break;
+        case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
+                type = IORESOURCE_REG;
+                break;
+        case ACPI_RESOURCE_TYPE_ADDRESS16:
+        case ACPI_RESOURCE_TYPE_ADDRESS32:
+        case ACPI_RESOURCE_TYPE_ADDRESS64:
+        case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
+                if (ares->data.address.resource_type == ACPI_MEMORY_RANGE)
+                        type = IORESOURCE_MEM;
+                else if (ares->data.address.resource_type == ACPI_IO_RANGE)
+                        type = IORESOURCE_IO;
+                else if (ares->data.address.resource_type ==
+                         ACPI_BUS_NUMBER_RANGE)
+                        type = IORESOURCE_BUS;
+                break;
+        default:
+                break;
+        }
+
+        return (type & types) ? 0 : 1;
+}
+EXPORT_SYMBOL_GPL(acpi_dev_filter_resource_type);
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index dc4d8960684a..bbca7830e18a 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -2544,6 +2544,7 @@ int __init acpi_scan_init(void)
         acpi_pci_link_init();
         acpi_processor_init();
         acpi_lpss_init();
+        acpi_apd_init();
         acpi_cmos_rtc_init();
         acpi_container_init();
         acpi_memory_hotplug_init();
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c
index 8aa9254a387f..7f251dd1a687 100644
--- a/drivers/acpi/sleep.c
+++ b/drivers/acpi/sleep.c
@@ -321,7 +321,7 @@ static struct dmi_system_id acpisleep_dmi_table[] __initdata = {
         {},
 };
 
-static void acpi_sleep_dmi_check(void)
+static void __init acpi_sleep_dmi_check(void)
 {
         int year;
 
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 032db459370f..88a4f99dd2a7 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -522,6 +522,24 @@ static struct dmi_system_id video_dmi_table[] __initdata = {
                 DMI_MATCH(DMI_PRODUCT_NAME, "370R4E/370R4V/370R5E/3570RE/370R5V"),
                 },
         },
+        {
+         /* https://bugzilla.redhat.com/show_bug.cgi?id=1186097 */
+         .callback = video_disable_native_backlight,
+         .ident = "SAMSUNG 3570R/370R/470R/450R/510R/4450RV",
+         .matches = {
+                DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
+                DMI_MATCH(DMI_PRODUCT_NAME, "3570R/370R/470R/450R/510R/4450RV"),
+                },
+        },
+        {
+         /* https://bugzilla.redhat.com/show_bug.cgi?id=1094948 */
+         .callback = video_disable_native_backlight,
+         .ident = "SAMSUNG 730U3E/740U3E",
+         .matches = {
+                DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
+                DMI_MATCH(DMI_PRODUCT_NAME, "730U3E/740U3E"),
+                },
+        },
 
         {
          /* https://bugzilla.redhat.com/show_bug.cgi?id=1163574 */
diff --git a/drivers/base/power/common.c b/drivers/base/power/common.c
index b0f138806bbc..f32b802b98f4 100644
--- a/drivers/base/power/common.c
+++ b/drivers/base/power/common.c
@@ -19,8 +19,8 @@
  * @dev: Device to handle.
  *
  * If power.subsys_data is NULL, point it to a new object, otherwise increment
- * its reference counter.  Return 1 if a new object has been created, otherwise
- * return 0 or error code.
+ * its reference counter.  Return 0 if new object has been created or refcount
+ * increased, otherwise negative error code.
  */
 int dev_pm_get_subsys_data(struct device *dev)
 {
@@ -56,13 +56,11 @@ EXPORT_SYMBOL_GPL(dev_pm_get_subsys_data);
  * @dev: Device to handle.
  *
  * If the reference counter of power.subsys_data is zero after dropping the
- * reference, power.subsys_data is removed.  Return 1 if that happens or 0
- * otherwise.
+ * reference, power.subsys_data is removed.
  */
-int dev_pm_put_subsys_data(struct device *dev)
+void dev_pm_put_subsys_data(struct device *dev)
 {
         struct pm_subsys_data *psd;
-        int ret = 1;
 
         spin_lock_irq(&dev->power.lock);
 
@@ -70,18 +68,14 @@ int dev_pm_put_subsys_data(struct device *dev)
         if (!psd)
                 goto out;
 
-        if (--psd->refcount == 0) {
+        if (--psd->refcount == 0)
                 dev->power.subsys_data = NULL;
-        } else {
+        else
                 psd = NULL;
-                ret = 0;
-        }
 
  out:
         spin_unlock_irq(&dev->power.lock);
         kfree(psd);
-
-        return ret;
 }
 EXPORT_SYMBOL_GPL(dev_pm_put_subsys_data);
 
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 0d8780c04a5e..ba4abbe4693c 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -344,14 +344,7 @@ static int genpd_dev_pm_qos_notifier(struct notifier_block *nb,
         struct device *dev;
 
         gpd_data = container_of(nb, struct generic_pm_domain_data, nb);
-
-        mutex_lock(&gpd_data->lock);
         dev = gpd_data->base.dev;
-        if (!dev) {
-                mutex_unlock(&gpd_data->lock);
-                return NOTIFY_DONE;
-        }
-        mutex_unlock(&gpd_data->lock);
 
         for (;;) {
                 struct generic_pm_domain *genpd;
@@ -1384,25 +1377,66 @@ EXPORT_SYMBOL_GPL(pm_genpd_syscore_poweron);
 
 #endif /* CONFIG_PM_SLEEP */
 
-static struct generic_pm_domain_data *__pm_genpd_alloc_dev_data(struct device *dev)
+static struct generic_pm_domain_data *genpd_alloc_dev_data(struct device *dev,
+                                        struct generic_pm_domain *genpd,
+                                        struct gpd_timing_data *td)
 {
         struct generic_pm_domain_data *gpd_data;
+        int ret;
+
+        ret = dev_pm_get_subsys_data(dev);
+        if (ret)
+                return ERR_PTR(ret);
 
         gpd_data = kzalloc(sizeof(*gpd_data), GFP_KERNEL);
-        if (!gpd_data)
-                return NULL;
+        if (!gpd_data) {
+                ret = -ENOMEM;
+                goto err_put;
+        }
+
+        if (td)
+                gpd_data->td = *td;
 
-        mutex_init(&gpd_data->lock);
+        gpd_data->base.dev = dev;
+        gpd_data->need_restore = -1;
+        gpd_data->td.constraint_changed = true;
+        gpd_data->td.effective_constraint_ns = -1;
         gpd_data->nb.notifier_call = genpd_dev_pm_qos_notifier;
-        dev_pm_qos_add_notifier(dev, &gpd_data->nb);
+
+        spin_lock_irq(&dev->power.lock);
+
+        if (dev->power.subsys_data->domain_data) {
+                ret = -EINVAL;
+                goto err_free;
+        }
+
+        dev->power.subsys_data->domain_data = &gpd_data->base;
+        dev->pm_domain = &genpd->domain;
+
+        spin_unlock_irq(&dev->power.lock);
+
         return gpd_data;
+
+ err_free:
+        spin_unlock_irq(&dev->power.lock);
+        kfree(gpd_data);
+ err_put:
+        dev_pm_put_subsys_data(dev);
+        return ERR_PTR(ret);
 }
 
-static void __pm_genpd_free_dev_data(struct device *dev,
-                                     struct generic_pm_domain_data *gpd_data)
+static void genpd_free_dev_data(struct device *dev,
+                                struct generic_pm_domain_data *gpd_data)
 {
-        dev_pm_qos_remove_notifier(dev, &gpd_data->nb);
+        spin_lock_irq(&dev->power.lock);
+
+        dev->pm_domain = NULL;
+        dev->power.subsys_data->domain_data = NULL;
+
+        spin_unlock_irq(&dev->power.lock);
+
         kfree(gpd_data);
+        dev_pm_put_subsys_data(dev);
 }
 
 /**
@@ -1414,8 +1448,7 @@ static void __pm_genpd_free_dev_data(struct device *dev,
 int __pm_genpd_add_device(struct generic_pm_domain *genpd, struct device *dev,
                           struct gpd_timing_data *td)
 {
-        struct generic_pm_domain_data *gpd_data_new, *gpd_data = NULL;
-        struct pm_domain_data *pdd;
+        struct generic_pm_domain_data *gpd_data;
         int ret = 0;
 
         dev_dbg(dev, "%s()\n", __func__);
@@ -1423,9 +1456,9 @@ int __pm_genpd_add_device(struct generic_pm_domain *genpd, struct device *dev,
         if (IS_ERR_OR_NULL(genpd) || IS_ERR_OR_NULL(dev))
                 return -EINVAL;
 
-        gpd_data_new = __pm_genpd_alloc_dev_data(dev);
-        if (!gpd_data_new)
-                return -ENOMEM;
+        gpd_data = genpd_alloc_dev_data(dev, genpd, td);
+        if (IS_ERR(gpd_data))
+                return PTR_ERR(gpd_data);
 
         genpd_acquire_lock(genpd);
 
@@ -1434,50 +1467,22 @@ int __pm_genpd_add_device(struct generic_pm_domain *genpd, struct device *dev,
                 goto out;
         }
 
-        list_for_each_entry(pdd, &genpd->dev_list, list_node)
-                if (pdd->dev == dev) {
-                        ret = -EINVAL;
-                        goto out;
-                }
-
-        ret = dev_pm_get_subsys_data(dev);
+        ret = genpd->attach_dev ? genpd->attach_dev(genpd, dev) : 0;
         if (ret)
                 goto out;
 
         genpd->device_count++;
         genpd->max_off_time_changed = true;
 
-        spin_lock_irq(&dev->power.lock);
-
-        dev->pm_domain = &genpd->domain;
-        if (dev->power.subsys_data->domain_data) {
-                gpd_data = to_gpd_data(dev->power.subsys_data->domain_data);
-        } else {
-                gpd_data = gpd_data_new;
-                dev->power.subsys_data->domain_data = &gpd_data->base;
-        }
-        gpd_data->refcount++;
-        if (td)
-                gpd_data->td = *td;
-
-        spin_unlock_irq(&dev->power.lock);
-
-        if (genpd->attach_dev)
-                genpd->attach_dev(genpd, dev);
-
-        mutex_lock(&gpd_data->lock);
-        gpd_data->base.dev = dev;
         list_add_tail(&gpd_data->base.list_node, &genpd->dev_list);
-        gpd_data->need_restore = -1;
-        gpd_data->td.constraint_changed = true;
-        gpd_data->td.effective_constraint_ns = -1;
-        mutex_unlock(&gpd_data->lock);
 
  out:
         genpd_release_lock(genpd);
 
-        if (gpd_data != gpd_data_new)
-                __pm_genpd_free_dev_data(dev, gpd_data_new);
+        if (ret)
+                genpd_free_dev_data(dev, gpd_data);
+        else
+                dev_pm_qos_add_notifier(dev, &gpd_data->nb);
 
         return ret;
 }
@@ -1504,7 +1509,6 @@ int pm_genpd_remove_device(struct generic_pm_domain *genpd,
 {
         struct generic_pm_domain_data *gpd_data;
         struct pm_domain_data *pdd;
-        bool remove = false;
         int ret = 0;
 
         dev_dbg(dev, "%s()\n", __func__);
@@ -1514,6 +1518,11 @@ int pm_genpd_remove_device(struct generic_pm_domain *genpd,
             ||  pd_to_genpd(dev->pm_domain) != genpd)
                 return -EINVAL;
 
+        /* The above validation also means we have existing domain_data. */
+        pdd = dev->power.subsys_data->domain_data;
+        gpd_data = to_gpd_data(pdd);
+        dev_pm_qos_remove_notifier(dev, &gpd_data->nb);
+
         genpd_acquire_lock(genpd);
 
         if (genpd->prepared_count > 0) {
@@ -1527,58 +1536,22 @@ int pm_genpd_remove_device(struct generic_pm_domain *genpd,
         if (genpd->detach_dev)
                 genpd->detach_dev(genpd, dev);
 
-        spin_lock_irq(&dev->power.lock);
-
-        dev->pm_domain = NULL;
-        pdd = dev->power.subsys_data->domain_data;
         list_del_init(&pdd->list_node);
-        gpd_data = to_gpd_data(pdd);
-        if (--gpd_data->refcount == 0) {
-                dev->power.subsys_data->domain_data = NULL;
-                remove = true;
-        }
-
-        spin_unlock_irq(&dev->power.lock);
-
-        mutex_lock(&gpd_data->lock);
-        pdd->dev = NULL;
-        mutex_unlock(&gpd_data->lock);
 
         genpd_release_lock(genpd);
 
-        dev_pm_put_subsys_data(dev);
-        if (remove)
-                __pm_genpd_free_dev_data(dev, gpd_data);
+        genpd_free_dev_data(dev, gpd_data);
 
         return 0;
 
  out:
         genpd_release_lock(genpd);
+        dev_pm_qos_add_notifier(dev, &gpd_data->nb);
 
         return ret;
 }
 
 /**
- * pm_genpd_dev_need_restore - Set/unset the device's "need restore" flag.
- * @dev: Device to set/unset the flag for.
- * @val: The new value of the device's "need restore" flag.
- */
-void pm_genpd_dev_need_restore(struct device *dev, bool val)
-{
-        struct pm_subsys_data *psd;
-        unsigned long flags;
-
-        spin_lock_irqsave(&dev->power.lock, flags);
-
-        psd = dev_to_psd(dev);
-        if (psd && psd->domain_data)
-                to_gpd_data(psd->domain_data)->need_restore = val ? 1 : 0;
-
-        spin_unlock_irqrestore(&dev->power.lock, flags);
-}
-EXPORT_SYMBOL_GPL(pm_genpd_dev_need_restore);
-
-/**
  * pm_genpd_add_subdomain - Add a subdomain to an I/O PM domain.
  * @genpd: Master PM domain to add the subdomain to.
  * @subdomain: Subdomain to be added.
diff --git a/drivers/base/power/opp.c b/drivers/base/power/opp.c
index 106c69359306..15bf29974c31 100644
--- a/drivers/base/power/opp.c
+++ b/drivers/base/power/opp.c
@@ -117,20 +117,20 @@ do {									\
 } while (0)
 
 /**
- * find_device_opp() - find device_opp struct using device pointer
+ * _find_device_opp() - find device_opp struct using device pointer
  * @dev:        device pointer used to lookup device OPPs
  *
  * Search list of device OPPs for one containing matching device. Does a RCU
  * reader operation to grab the pointer needed.
  *
- * Returns pointer to 'struct device_opp' if found, otherwise -ENODEV or
+ * Return: pointer to 'struct device_opp' if found, otherwise -ENODEV or
  * -EINVAL based on type of error.
  *
  * Locking: This function must be called under rcu_read_lock(). device_opp
  * is a RCU protected pointer. This means that device_opp is valid as long
  * as we are under RCU lock.
  */
-static struct device_opp *find_device_opp(struct device *dev)
+static struct device_opp *_find_device_opp(struct device *dev)
 {
         struct device_opp *tmp_dev_opp, *dev_opp = ERR_PTR(-ENODEV);
 
@@ -153,7 +153,7 @@ static struct device_opp *find_device_opp(struct device *dev)
  * dev_pm_opp_get_voltage() - Gets the voltage corresponding to an available opp
  * @opp:        opp for which voltage has to be returned for
  *
- * Return voltage in micro volt corresponding to the opp, else
+ * Return: voltage in micro volt corresponding to the opp, else
  * return 0
  *
  * Locking: This function must be called under rcu_read_lock(). opp is a rcu
@@ -169,6 +169,8 @@ unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp)
         struct dev_pm_opp *tmp_opp;
         unsigned long v = 0;
 
+        opp_rcu_lockdep_assert();
+
         tmp_opp = rcu_dereference(opp);
         if (unlikely(IS_ERR_OR_NULL(tmp_opp)) || !tmp_opp->available)
                 pr_err("%s: Invalid parameters\n", __func__);
@@ -183,7 +185,7 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_get_voltage);
  * dev_pm_opp_get_freq() - Gets the frequency corresponding to an available opp
  * @opp:        opp for which frequency has to be returned for
  *
- * Return frequency in hertz corresponding to the opp, else
+ * Return: frequency in hertz corresponding to the opp, else
  * return 0
  *
  * Locking: This function must be called under rcu_read_lock(). opp is a rcu
@@ -199,6 +201,8 @@ unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp)
         struct dev_pm_opp *tmp_opp;
         unsigned long f = 0;
 
+        opp_rcu_lockdep_assert();
+
         tmp_opp = rcu_dereference(opp);
         if (unlikely(IS_ERR_OR_NULL(tmp_opp)) || !tmp_opp->available)
                 pr_err("%s: Invalid parameters\n", __func__);
@@ -213,7 +217,7 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_get_freq);
  * dev_pm_opp_get_opp_count() - Get number of opps available in the opp list
  * @dev:        device for which we do this operation
  *
- * This function returns the number of available opps if there are any,
+ * Return: This function returns the number of available opps if there are any,
  * else returns 0 if none or the corresponding error value.
  *
  * Locking: This function takes rcu_read_lock().
@@ -226,7 +230,7 @@ int dev_pm_opp_get_opp_count(struct device *dev)
 
         rcu_read_lock();
 
-        dev_opp = find_device_opp(dev);
+        dev_opp = _find_device_opp(dev);
         if (IS_ERR(dev_opp)) {
                 count = PTR_ERR(dev_opp);
                 dev_err(dev, "%s: device OPP not found (%d)\n",
@@ -251,9 +255,9 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_get_opp_count);
  * @freq:               frequency to search for
  * @available:          true/false - match for available opp
  *
- * Searches for exact match in the opp list and returns pointer to the matching
- * opp if found, else returns ERR_PTR in case of error and should be handled
- * using IS_ERR. Error return values can be:
+ * Return: Searches for exact match in the opp list and returns pointer to the
+ * matching opp if found, else returns ERR_PTR in case of error and should
+ * be handled using IS_ERR. Error return values can be:
  * EINVAL:      for bad pointer
  * ERANGE:      no match found for search
  * ENODEV:      if device not found in list of registered devices
@@ -280,7 +284,7 @@ struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev,
 
         opp_rcu_lockdep_assert();
 
-        dev_opp = find_device_opp(dev);
+        dev_opp = _find_device_opp(dev);
         if (IS_ERR(dev_opp)) {
                 int r = PTR_ERR(dev_opp);
                 dev_err(dev, "%s: device OPP not found (%d)\n", __func__, r);
@@ -307,7 +311,7 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_exact);
  * Search for the matching ceil *available* OPP from a starting freq
  * for a device.
  *
- * Returns matching *opp and refreshes *freq accordingly, else returns
+ * Return: matching *opp and refreshes *freq accordingly, else returns
  * ERR_PTR in case of error and should be handled using IS_ERR. Error return
  * values can be:
  * EINVAL:      for bad pointer
@@ -333,7 +337,7 @@ struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev,
                 return ERR_PTR(-EINVAL);
         }
 
-        dev_opp = find_device_opp(dev);
+        dev_opp = _find_device_opp(dev);
         if (IS_ERR(dev_opp))
                 return ERR_CAST(dev_opp);
 
@@ -357,7 +361,7 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_ceil);
  * Search for the matching floor *available* OPP from a starting freq
  * for a device.
  *
- * Returns matching *opp and refreshes *freq accordingly, else returns
+ * Return: matching *opp and refreshes *freq accordingly, else returns
  * ERR_PTR in case of error and should be handled using IS_ERR. Error return
  * values can be:
  * EINVAL:      for bad pointer
@@ -383,7 +387,7 @@ struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
                 return ERR_PTR(-EINVAL);
         }
 
-        dev_opp = find_device_opp(dev);
+        dev_opp = _find_device_opp(dev);
         if (IS_ERR(dev_opp))
                 return ERR_CAST(dev_opp);
 
@@ -403,7 +407,16 @@ struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
 }
 EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_floor);
 
-static struct device_opp *add_device_opp(struct device *dev)
+/**
+ * _add_device_opp() - Allocate a new device OPP table
+ * @dev:        device for which we do this operation
+ *
+ * New device node which uses OPPs - used when multiple devices with OPP tables
+ * are maintained.
+ *
+ * Return: valid device_opp pointer if success, else NULL.
+ */
+static struct device_opp *_add_device_opp(struct device *dev)
 {
         struct device_opp *dev_opp;
 
@@ -424,8 +437,35 @@ static struct device_opp *add_device_opp(struct device *dev)
         return dev_opp;
 }
 
-static int dev_pm_opp_add_dynamic(struct device *dev, unsigned long freq,
-                                  unsigned long u_volt, bool dynamic)
+/**
+ * _opp_add_dynamic() - Allocate a dynamic OPP.
+ * @dev:        device for which we do this operation
+ * @freq:       Frequency in Hz for this OPP
+ * @u_volt:     Voltage in uVolts for this OPP
+ * @dynamic:    Dynamically added OPPs.
+ *
+ * This function adds an opp definition to the opp list and returns status.
+ * The opp is made available by default and it can be controlled using
+ * dev_pm_opp_enable/disable functions and may be removed by dev_pm_opp_remove.
+ *
+ * NOTE: "dynamic" parameter impacts OPPs added by the of_init_opp_table and
+ * freed by of_free_opp_table.
+ *
+ * Locking: The internal device_opp and opp structures are RCU protected.
+ * Hence this function internally uses RCU updater strategy with mutex locks
+ * to keep the integrity of the internal data structures. Callers should ensure
+ * that this function is *NOT* called under RCU protection or in contexts where
+ * mutex cannot be locked.
+ *
+ * Return:
+ * 0            On success OR
+ *              Duplicate OPPs (both freq and volt are same) and opp->available
+ * -EEXIST      Freq are same and volt are different OR
+ *              Duplicate OPPs (both freq and volt are same) and !opp->available
+ * -ENOMEM      Memory allocation failure
+ */
+static int _opp_add_dynamic(struct device *dev, unsigned long freq,
+                            long u_volt, bool dynamic)
 {
         struct device_opp *dev_opp = NULL;
         struct dev_pm_opp *opp, *new_opp;
@@ -449,9 +489,9 @@ static int dev_pm_opp_add_dynamic(struct device *dev, unsigned long freq,
         new_opp->dynamic = dynamic;
 
         /* Check for existing list for 'dev' */
-        dev_opp = find_device_opp(dev);
+        dev_opp = _find_device_opp(dev);
         if (IS_ERR(dev_opp)) {
-                dev_opp = add_device_opp(dev);
+                dev_opp = _add_device_opp(dev);
                 if (!dev_opp) {
                         ret = -ENOMEM;
                         goto free_opp;
@@ -519,34 +559,53 @@ free_opp:
  * mutex cannot be locked.
  *
  * Return:
- * 0:           On success OR
+ * 0            On success OR
  *              Duplicate OPPs (both freq and volt are same) and opp->available
- * -EEXIST:     Freq are same and volt are different OR
+ * -EEXIST      Freq are same and volt are different OR
  *              Duplicate OPPs (both freq and volt are same) and !opp->available
- * -ENOMEM:     Memory allocation failure
+ * -ENOMEM      Memory allocation failure
  */
 int dev_pm_opp_add(struct device *dev, unsigned long freq, unsigned long u_volt)
 {
-        return dev_pm_opp_add_dynamic(dev, freq, u_volt, true);
+        return _opp_add_dynamic(dev, freq, u_volt, true);
 }
 EXPORT_SYMBOL_GPL(dev_pm_opp_add);
 
-static void kfree_opp_rcu(struct rcu_head *head)
+/**
+ * _kfree_opp_rcu() - Free OPP RCU handler
+ * @head:       RCU head
+ */
+static void _kfree_opp_rcu(struct rcu_head *head)
 {
         struct dev_pm_opp *opp = container_of(head, struct dev_pm_opp, rcu_head);
 
         kfree_rcu(opp, rcu_head);
 }
 
-static void kfree_device_rcu(struct rcu_head *head)
+/**
+ * _kfree_device_rcu() - Free device_opp RCU handler
+ * @head:       RCU head
+ */
+static void _kfree_device_rcu(struct rcu_head *head)
 {
         struct device_opp *device_opp = container_of(head, struct device_opp, rcu_head);
 
         kfree_rcu(device_opp, rcu_head);
 }
 
-static void __dev_pm_opp_remove(struct device_opp *dev_opp,
-                                struct dev_pm_opp *opp)
+/**
+ * _opp_remove()  - Remove an OPP from a table definition
+ * @dev_opp:    points back to the device_opp struct this opp belongs to
+ * @opp:        pointer to the OPP to remove
+ *
+ * This function removes an opp definition from the opp list.
+ *
+ * Locking: The internal device_opp and opp structures are RCU protected.
+ * It is assumed that the caller holds required mutex for an RCU updater
+ * strategy.
+ */
+static void _opp_remove(struct device_opp *dev_opp,
+                        struct dev_pm_opp *opp)
 {
         /*
          * Notify the changes in the availability of the operable
@@ -554,12 +613,12 @@ static void __dev_pm_opp_remove(struct device_opp *dev_opp,
          */
         srcu_notifier_call_chain(&dev_opp->srcu_head, OPP_EVENT_REMOVE, opp);
         list_del_rcu(&opp->node);
-        call_srcu(&dev_opp->srcu_head.srcu, &opp->rcu_head, kfree_opp_rcu);
+        call_srcu(&dev_opp->srcu_head.srcu, &opp->rcu_head, _kfree_opp_rcu);
 
         if (list_empty(&dev_opp->opp_list)) {
                 list_del_rcu(&dev_opp->node);
                 call_srcu(&dev_opp->srcu_head.srcu, &dev_opp->rcu_head,
-                          kfree_device_rcu);
+                          _kfree_device_rcu);
         }
 }
 
@@ -569,6 +628,12 @@ static void __dev_pm_opp_remove(struct device_opp *dev_opp,
  * @freq:       OPP to remove with matching 'freq'
  *
  * This function removes an opp from the opp list.
+ *
+ * Locking: The internal device_opp and opp structures are RCU protected.
+ * Hence this function internally uses RCU updater strategy with mutex locks
+ * to keep the integrity of the internal data structures. Callers should ensure
+ * that this function is *NOT* called under RCU protection or in contexts where
+ * mutex cannot be locked.
  */
 void dev_pm_opp_remove(struct device *dev, unsigned long freq)
 {
@@ -579,7 +644,7 @@ void dev_pm_opp_remove(struct device *dev, unsigned long freq)
         /* Hold our list modification lock here */
         mutex_lock(&dev_opp_list_lock);
 
-        dev_opp = find_device_opp(dev);
+        dev_opp = _find_device_opp(dev);
         if (IS_ERR(dev_opp))
                 goto unlock;
 
@@ -596,14 +661,14 @@ void dev_pm_opp_remove(struct device *dev, unsigned long freq)
                 goto unlock;
         }
 
-        __dev_pm_opp_remove(dev_opp, opp);
+        _opp_remove(dev_opp, opp);
 unlock:
         mutex_unlock(&dev_opp_list_lock);
 }
 EXPORT_SYMBOL_GPL(dev_pm_opp_remove);
 
 /**
- * opp_set_availability() - helper to set the availability of an opp
+ * _opp_set_availability() - helper to set the availability of an opp
  * @dev:                device for which we do this operation
  * @freq:               OPP frequency to modify availability
  * @availability_req:   availability status requested for this opp
@@ -611,7 +676,7 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_remove);
  * Set the availability of an OPP with an RCU operation, opp_{enable,disable}
  * share a common logic which is isolated here.
  *
- * Returns -EINVAL for bad pointers, -ENOMEM if no memory available for the
+ * Return: -EINVAL for bad pointers, -ENOMEM if no memory available for the
  * copy operation, returns 0 if no modifcation was done OR modification was
  * successful.
  *
@@ -621,8 +686,8 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_remove);
  * that this function is *NOT* called under RCU protection or in contexts where
  * mutex locking or synchronize_rcu() blocking calls cannot be used.
  */
-static int opp_set_availability(struct device *dev, unsigned long freq,
-                bool availability_req)
+static int _opp_set_availability(struct device *dev, unsigned long freq,
+                                 bool availability_req)
 {
         struct device_opp *dev_opp;
         struct dev_pm_opp *new_opp, *tmp_opp, *opp = ERR_PTR(-ENODEV);
@@ -638,7 +703,7 @@ static int opp_set_availability(struct device *dev, unsigned long freq,
         mutex_lock(&dev_opp_list_lock);
 
         /* Find the device_opp */
-        dev_opp = find_device_opp(dev);
+        dev_opp = _find_device_opp(dev);
         if (IS_ERR(dev_opp)) {
                 r = PTR_ERR(dev_opp);
                 dev_warn(dev, "%s: Device OPP not found (%d)\n", __func__, r);
@@ -668,7 +733,7 @@ static int opp_set_availability(struct device *dev, unsigned long freq,
 
         list_replace_rcu(&opp->node, &new_opp->node);
         mutex_unlock(&dev_opp_list_lock);
-        call_srcu(&dev_opp->srcu_head.srcu, &opp->rcu_head, kfree_opp_rcu);
+        call_srcu(&dev_opp->srcu_head.srcu, &opp->rcu_head, _kfree_opp_rcu);
 
         /* Notify the change of the OPP availability */
         if (availability_req)
@@ -700,10 +765,14 @@ unlock:
  * integrity of the internal data structures. Callers should ensure that
  * this function is *NOT* called under RCU protection or in contexts where
  * mutex locking or synchronize_rcu() blocking calls cannot be used.
+ *
+ * Return: -EINVAL for bad pointers, -ENOMEM if no memory available for the
+ * copy operation, returns 0 if no modifcation was done OR modification was
+ * successful.
  */
 int dev_pm_opp_enable(struct device *dev, unsigned long freq)
 {
-        return opp_set_availability(dev, freq, true);
+        return _opp_set_availability(dev, freq, true);
 }
 EXPORT_SYMBOL_GPL(dev_pm_opp_enable);
 
@@ -722,26 +791,41 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_enable);
  * integrity of the internal data structures. Callers should ensure that
  * this function is *NOT* called under RCU protection or in contexts where
  * mutex locking or synchronize_rcu() blocking calls cannot be used.
+ *
+ * Return: -EINVAL for bad pointers, -ENOMEM if no memory available for the
+ * copy operation, returns 0 if no modifcation was done OR modification was
+ * successful.
  */
 int dev_pm_opp_disable(struct device *dev, unsigned long freq)
 {
-        return opp_set_availability(dev, freq, false);
+        return _opp_set_availability(dev, freq, false);
 }
 EXPORT_SYMBOL_GPL(dev_pm_opp_disable);
 
 /**
  * dev_pm_opp_get_notifier() - find notifier_head of the device with opp
  * @dev:        device pointer used to lookup device OPPs.
+ *
+ * Return: pointer to  notifier head if found, otherwise -ENODEV or
+ * -EINVAL based on type of error casted as pointer. value must be checked
+ *  with IS_ERR to determine valid pointer or error result.
+ *
+ * Locking: This function must be called under rcu_read_lock(). dev_opp is a RCU
+ * protected pointer. The reason for the same is that the opp pointer which is
+ * returned will remain valid for use with opp_get_{voltage, freq} only while
+ * under the locked area. The pointer returned must be used prior to unlocking
+ * with rcu_read_unlock() to maintain the integrity of the pointer.
  */
 struct srcu_notifier_head *dev_pm_opp_get_notifier(struct device *dev)
 {
-        struct device_opp *dev_opp = find_device_opp(dev);
+        struct device_opp *dev_opp = _find_device_opp(dev);
 
         if (IS_ERR(dev_opp))
                 return ERR_CAST(dev_opp); /* matching type */
 
         return &dev_opp->srcu_head;
 }
+EXPORT_SYMBOL_GPL(dev_pm_opp_get_notifier);
 
 #ifdef CONFIG_OF
 /**
@@ -749,6 +833,22 @@ struct srcu_notifier_head *dev_pm_opp_get_notifier(struct device *dev)
  * @dev:        device pointer used to lookup device OPPs.
  *
  * Register the initial OPP table with the OPP library for given device.
+ *
+ * Locking: The internal device_opp and opp structures are RCU protected.
+ * Hence this function indirectly uses RCU updater strategy with mutex locks
+ * to keep the integrity of the internal data structures. Callers should ensure
+ * that this function is *NOT* called under RCU protection or in contexts where
+ * mutex cannot be locked.
+ *
+ * Return:
+ * 0            On success OR
+ *              Duplicate OPPs (both freq and volt are same) and opp->available
+ * -EEXIST      Freq are same and volt are different OR
+ *              Duplicate OPPs (both freq and volt are same) and !opp->available
+ * -ENOMEM      Memory allocation failure
+ * -ENODEV      when 'operating-points' property is not found or is invalid data
+ *              in device node.
+ * -ENODATA     when empty 'operating-points' property is found
  */
 int of_init_opp_table(struct device *dev)
 {
@@ -777,7 +877,7 @@ int of_init_opp_table(struct device *dev)
                 unsigned long freq = be32_to_cpup(val++) * 1000;
                 unsigned long volt = be32_to_cpup(val++);
 
-                if (dev_pm_opp_add_dynamic(dev, freq, volt, false))
+                if (_opp_add_dynamic(dev, freq, volt, false))
                         dev_warn(dev, "%s: Failed to add OPP %ld\n",
                                  __func__, freq);
                 nr -= 2;
@@ -792,6 +892,12 @@ EXPORT_SYMBOL_GPL(of_init_opp_table);
  * @dev:        device pointer used to lookup device OPPs.
  *
  * Free OPPs created using static entries present in DT.
+ *
+ * Locking: The internal device_opp and opp structures are RCU protected.
+ * Hence this function indirectly uses RCU updater strategy with mutex locks
+ * to keep the integrity of the internal data structures. Callers should ensure
+ * that this function is *NOT* called under RCU protection or in contexts where
+ * mutex cannot be locked.
  */
 void of_free_opp_table(struct device *dev)
 {
@@ -799,7 +905,7 @@ void of_free_opp_table(struct device *dev)
         struct dev_pm_opp *opp, *tmp;
 
         /* Check for existing list for 'dev' */
-        dev_opp = find_device_opp(dev);
+        dev_opp = _find_device_opp(dev);
         if (IS_ERR(dev_opp)) {
                 int error = PTR_ERR(dev_opp);
                 if (error != -ENODEV)
@@ -816,7 +922,7 @@ void of_free_opp_table(struct device *dev)
         /* Free static OPPs */
         list_for_each_entry_safe(opp, tmp, &dev_opp->opp_list, node) {
                 if (!opp->dynamic)
-                        __dev_pm_opp_remove(dev_opp, opp);
+                        _opp_remove(dev_opp, opp);
         }
 
         mutex_unlock(&dev_opp_list_lock);
diff --git a/drivers/base/power/qos.c b/drivers/base/power/qos.c
index a8fe4c1a8d07..e56d538d039e 100644
--- a/drivers/base/power/qos.c
+++ b/drivers/base/power/qos.c
@@ -64,6 +64,8 @@ enum pm_qos_flags_status __dev_pm_qos_flags(struct device *dev, s32 mask)
         struct pm_qos_flags *pqf;
         s32 val;
 
+        lockdep_assert_held(&dev->power.lock);
+
         if (IS_ERR_OR_NULL(qos))
                 return PM_QOS_FLAGS_UNDEFINED;
 
@@ -104,6 +106,8 @@ EXPORT_SYMBOL_GPL(dev_pm_qos_flags);
  */
 s32 __dev_pm_qos_read_value(struct device *dev)
 {
+        lockdep_assert_held(&dev->power.lock);
+
         return IS_ERR_OR_NULL(dev->power.qos) ?
                 0 : pm_qos_read_value(&dev->power.qos->resume_latency);
 }
diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c
index d5d4cd82b9f7..5c0baa9ffc64 100644
--- a/drivers/char/hpet.c
+++ b/drivers/char/hpet.c
@@ -976,8 +976,8 @@ static acpi_status hpet_resources(struct acpi_resource *res, void *data)
         status = acpi_resource_to_address64(res, &addr);
 
         if (ACPI_SUCCESS(status)) {
-                hdp->hd_phys_address = addr.minimum;
-                hdp->hd_address = ioremap(addr.minimum, addr.address_length);
+                hdp->hd_phys_address = addr.address.minimum;
+                hdp->hd_address = ioremap(addr.address.minimum, addr.address.address_length);
 
                 if (hpet_is_known(hdp)) {
                         iounmap(hdp->hd_address);
diff --git a/drivers/cpufreq/Kconfig.x86 b/drivers/cpufreq/Kconfig.x86
index 89ae88f91895..c59bdcb83217 100644
--- a/drivers/cpufreq/Kconfig.x86
+++ b/drivers/cpufreq/Kconfig.x86
@@ -57,6 +57,16 @@ config X86_ACPI_CPUFREQ_CPB
           By enabling this option the acpi_cpufreq driver provides the old
           entry in addition to the new boost ones, for compatibility reasons.
 
+config X86_SFI_CPUFREQ
+        tristate "SFI Performance-States driver"
+        depends on X86_INTEL_MID && SFI
+        help
+          This adds a CPUFreq driver for some Silvermont based Intel Atom
+          architectures like Z34xx and Z35xx which enumerate processor
+          performance states through SFI.
+
+          If in doubt, say N.
+
 config ELAN_CPUFREQ
         tristate "AMD Elan SC400 and SC410"
         depends on MELAN
diff --git a/drivers/cpufreq/Makefile b/drivers/cpufreq/Makefile
index b3ca7b0b2c33..8b4220ac888b 100644
--- a/drivers/cpufreq/Makefile
+++ b/drivers/cpufreq/Makefile
@@ -41,6 +41,7 @@ obj-$(CONFIG_X86_P4_CLOCKMOD)		+= p4-clockmod.o
 obj-$(CONFIG_X86_CPUFREQ_NFORCE2)       += cpufreq-nforce2.o
 obj-$(CONFIG_X86_INTEL_PSTATE)          += intel_pstate.o
 obj-$(CONFIG_X86_AMD_FREQ_SENSITIVITY)  += amd_freq_sensitivity.o
+obj-$(CONFIG_X86_SFI_CPUFREQ)           += sfi-cpufreq.o
 
 ##################################################################################
 # ARM SoC drivers
diff --git a/drivers/cpufreq/cpufreq-dt.c b/drivers/cpufreq/cpufreq-dt.c
index fde97d6e31d6..bab67db54b7e 100644
--- a/drivers/cpufreq/cpufreq-dt.c
+++ b/drivers/cpufreq/cpufreq-dt.c
@@ -320,8 +320,7 @@ static int cpufreq_exit(struct cpufreq_policy *policy)
 {
         struct private_data *priv = policy->driver_data;
 
-        if (priv->cdev)
-                cpufreq_cooling_unregister(priv->cdev);
+        cpufreq_cooling_unregister(priv->cdev);
         dev_pm_opp_free_cpufreq_table(priv->cpu_dev, &policy->freq_table);
         of_free_opp_table(priv->cpu_dev);
         clk_put(policy->clk);
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 46bed4f81cde..28e59a48b35f 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -27,9 +27,21 @@
 #include <linux/mutex.h>
 #include <linux/slab.h>
 #include <linux/suspend.h>
+#include <linux/syscore_ops.h>
 #include <linux/tick.h>
 #include <trace/events/power.h>
 
+/* Macros to iterate over lists */
+/* Iterate over online CPUs policies */
+static LIST_HEAD(cpufreq_policy_list);
+#define for_each_policy(__policy)                               \
+        list_for_each_entry(__policy, &cpufreq_policy_list, policy_list)
+
+/* Iterate over governors */
+static LIST_HEAD(cpufreq_governor_list);
+#define for_each_governor(__governor)                           \
+        list_for_each_entry(__governor, &cpufreq_governor_list, governor_list)
+
 /**
  * The "cpufreq driver" - the arch- or hardware-dependent low
  * level driver of CPUFreq support, and its spinlock. This lock
@@ -40,7 +52,6 @@ static DEFINE_PER_CPU(struct cpufreq_policy *, cpufreq_cpu_data);
 static DEFINE_PER_CPU(struct cpufreq_policy *, cpufreq_cpu_data_fallback);
 static DEFINE_RWLOCK(cpufreq_driver_lock);
 DEFINE_MUTEX(cpufreq_governor_lock);
-static LIST_HEAD(cpufreq_policy_list);
 
 /* This one keeps track of the previously set governor of a removed CPU */
 static DEFINE_PER_CPU(char[CPUFREQ_NAME_LEN], cpufreq_cpu_governor);
@@ -62,7 +73,7 @@ static DECLARE_RWSEM(cpufreq_rwsem);
 /* internal prototypes */
 static int __cpufreq_governor(struct cpufreq_policy *policy,
                 unsigned int event);
-static unsigned int __cpufreq_get(unsigned int cpu);
+static unsigned int __cpufreq_get(struct cpufreq_policy *policy);
 static void handle_update(struct work_struct *work);
 
 /**
@@ -93,7 +104,6 @@ void disable_cpufreq(void)
 {
         off = 1;
 }
-static LIST_HEAD(cpufreq_governor_list);
 static DEFINE_MUTEX(cpufreq_governor_mutex);
 
 bool have_governor_per_policy(void)
@@ -202,7 +212,7 @@ struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu)
         struct cpufreq_policy *policy = NULL;
         unsigned long flags;
 
-        if (cpufreq_disabled() || (cpu >= nr_cpu_ids))
+        if (cpu >= nr_cpu_ids)
                 return NULL;
 
         if (!down_read_trylock(&cpufreq_rwsem))
@@ -229,9 +239,6 @@ EXPORT_SYMBOL_GPL(cpufreq_cpu_get);
 
 void cpufreq_cpu_put(struct cpufreq_policy *policy)
 {
-        if (cpufreq_disabled())
-                return;
-
         kobject_put(&policy->kobj);
         up_read(&cpufreq_rwsem);
 }
@@ -249,12 +256,12 @@ EXPORT_SYMBOL_GPL(cpufreq_cpu_put);
  * systems as each CPU might be scaled differently. So, use the arch
  * per-CPU loops_per_jiffy value wherever possible.
  */
-#ifndef CONFIG_SMP
-static unsigned long l_p_j_ref;
-static unsigned int l_p_j_ref_freq;
-
 static void adjust_jiffies(unsigned long val, struct cpufreq_freqs *ci)
 {
+#ifndef CONFIG_SMP
+        static unsigned long l_p_j_ref;
+        static unsigned int l_p_j_ref_freq;
+
         if (ci->flags & CPUFREQ_CONST_LOOPS)
                 return;
 
@@ -270,13 +277,8 @@ static void adjust_jiffies(unsigned long val, struct cpufreq_freqs *ci)
                 pr_debug("scaling loops_per_jiffy to %lu for frequency %u kHz\n",
                          loops_per_jiffy, ci->new);
         }
-}
-#else
-static inline void adjust_jiffies(unsigned long val, struct cpufreq_freqs *ci)
-{
-        return;
-}
 #endif
+}
 
 static void __cpufreq_notify_transition(struct cpufreq_policy *policy,
                 struct cpufreq_freqs *freqs, unsigned int state)
@@ -432,11 +434,11 @@ static ssize_t store_boost(struct kobject *kobj, struct attribute *attr,
 }
 define_one_global_rw(boost);
 
-static struct cpufreq_governor *__find_governor(const char *str_governor)
+static struct cpufreq_governor *find_governor(const char *str_governor)
 {
         struct cpufreq_governor *t;
 
-        list_for_each_entry(t, &cpufreq_governor_list, governor_list)
+        for_each_governor(t)
                 if (!strncasecmp(str_governor, t->name, CPUFREQ_NAME_LEN))
                         return t;
 
@@ -463,12 +465,12 @@ static int cpufreq_parse_governor(char *str_governor, unsigned int *policy,
                         *policy = CPUFREQ_POLICY_POWERSAVE;
                         err = 0;
                 }
-        } else if (has_target()) {
+        } else {
                 struct cpufreq_governor *t;
 
                 mutex_lock(&cpufreq_governor_mutex);
 
-                t = __find_governor(str_governor);
+                t = find_governor(str_governor);
 
                 if (t == NULL) {
                         int ret;
@@ -478,7 +480,7 @@ static int cpufreq_parse_governor(char *str_governor, unsigned int *policy,
                         mutex_lock(&cpufreq_governor_mutex);
 
                         if (ret == 0)
-                                t = __find_governor(str_governor);
+                                t = find_governor(str_governor);
                 }
 
                 if (t != NULL) {
@@ -513,8 +515,7 @@ show_one(cpuinfo_transition_latency, cpuinfo.transition_latency);
 show_one(scaling_min_freq, min);
 show_one(scaling_max_freq, max);
 
-static ssize_t show_scaling_cur_freq(
-        struct cpufreq_policy *policy, char *buf)
+static ssize_t show_scaling_cur_freq(struct cpufreq_policy *policy, char *buf)
 {
         ssize_t ret;
 
@@ -563,7 +564,7 @@ store_one(scaling_max_freq, max);
 static ssize_t show_cpuinfo_cur_freq(struct cpufreq_policy *policy,
                                         char *buf)
 {
-        unsigned int cur_freq = __cpufreq_get(policy->cpu);
+        unsigned int cur_freq = __cpufreq_get(policy);
         if (!cur_freq)
                 return sprintf(buf, "<unknown>");
         return sprintf(buf, "%u\n", cur_freq);
@@ -639,7 +640,7 @@ static ssize_t show_scaling_available_governors(struct cpufreq_policy *policy,
                 goto out;
         }
 
-        list_for_each_entry(t, &cpufreq_governor_list, governor_list) {
+        for_each_governor(t) {
                 if (i >= (ssize_t) ((PAGE_SIZE / sizeof(char))
                     - (CPUFREQ_NAME_LEN + 2)))
                         goto out;
@@ -902,7 +903,7 @@ static int cpufreq_add_dev_interface(struct cpufreq_policy *policy,
 
         /* set up files for this cpu device */
         drv_attr = cpufreq_driver->attr;
-        while ((drv_attr) && (*drv_attr)) {
+        while (drv_attr && *drv_attr) {
                 ret = sysfs_create_file(&policy->kobj, &((*drv_attr)->attr));
                 if (ret)
                         return ret;
@@ -936,7 +937,7 @@ static void cpufreq_init_policy(struct cpufreq_policy *policy)
         memcpy(&new_policy, policy, sizeof(*policy));
 
         /* Update governor of new_policy to the governor used before hotplug */
-        gov = __find_governor(per_cpu(cpufreq_cpu_governor, policy->cpu));
+        gov = find_governor(per_cpu(cpufreq_cpu_governor, policy->cpu));
         if (gov)
                 pr_debug("Restoring governor %s for cpu %d\n",
                                 policy->governor->name, policy->cpu);
@@ -958,7 +959,6 @@ static void cpufreq_init_policy(struct cpufreq_policy *policy)
         }
 }
 
-#ifdef CONFIG_HOTPLUG_CPU
 static int cpufreq_add_policy_cpu(struct cpufreq_policy *policy,
                                   unsigned int cpu, struct device *dev)
 {
@@ -996,7 +996,6 @@ static int cpufreq_add_policy_cpu(struct cpufreq_policy *policy,
 
         return sysfs_create_link(&dev->kobj, &policy->kobj, "cpufreq");
 }
-#endif
 
 static struct cpufreq_policy *cpufreq_policy_restore(unsigned int cpu)
 {
@@ -1033,6 +1032,8 @@ static struct cpufreq_policy *cpufreq_policy_alloc(void)
         init_rwsem(&policy->rwsem);
         spin_lock_init(&policy->transition_lock);
         init_waitqueue_head(&policy->transition_wait);
+        init_completion(&policy->kobj_unregister);
+        INIT_WORK(&policy->update, handle_update);
 
         return policy;
 
@@ -1091,15 +1092,9 @@ static int update_policy_cpu(struct cpufreq_policy *policy, unsigned int cpu,
         }
 
         down_write(&policy->rwsem);
-
-        policy->last_cpu = policy->cpu;
         policy->cpu = cpu;
-
         up_write(&policy->rwsem);
 
-        blocking_notifier_call_chain(&cpufreq_policy_notifier_list,
-                        CPUFREQ_UPDATE_POLICY_CPU, policy);
-
         return 0;
 }
 
@@ -1110,41 +1105,32 @@ static int __cpufreq_add_dev(struct device *dev, struct subsys_interface *sif)
         struct cpufreq_policy *policy;
         unsigned long flags;
         bool recover_policy = cpufreq_suspended;
-#ifdef CONFIG_HOTPLUG_CPU
-        struct cpufreq_policy *tpolicy;
-#endif
 
         if (cpu_is_offline(cpu))
                 return 0;
 
         pr_debug("adding CPU %u\n", cpu);
 
-#ifdef CONFIG_SMP
         /* check whether a different CPU already registered this
          * CPU because it is in the same boat. */
-        policy = cpufreq_cpu_get(cpu);
-        if (unlikely(policy)) {
-                cpufreq_cpu_put(policy);
+        policy = cpufreq_cpu_get_raw(cpu);
+        if (unlikely(policy))
                 return 0;
-        }
-#endif
 
         if (!down_read_trylock(&cpufreq_rwsem))
                 return 0;
 
-#ifdef CONFIG_HOTPLUG_CPU
         /* Check if this cpu was hot-unplugged earlier and has siblings */
         read_lock_irqsave(&cpufreq_driver_lock, flags);
-        list_for_each_entry(tpolicy, &cpufreq_policy_list, policy_list) {
-                if (cpumask_test_cpu(cpu, tpolicy->related_cpus)) {
+        for_each_policy(policy) {
+                if (cpumask_test_cpu(cpu, policy->related_cpus)) {
                         read_unlock_irqrestore(&cpufreq_driver_lock, flags);
-                        ret = cpufreq_add_policy_cpu(tpolicy, cpu, dev);
+                        ret = cpufreq_add_policy_cpu(policy, cpu, dev);
                         up_read(&cpufreq_rwsem);
                         return ret;
                 }
         }
         read_unlock_irqrestore(&cpufreq_driver_lock, flags);
-#endif
 
         /*
          * Restore the saved policy when doing light-weight init and fall back
@@ -1171,9 +1157,6 @@ static int __cpufreq_add_dev(struct device *dev, struct subsys_interface *sif)
 
         cpumask_copy(policy->cpus, cpumask_of(cpu));
 
-        init_completion(&policy->kobj_unregister);
-        INIT_WORK(&policy->update, handle_update);
-
         /* call driver. From then on the cpufreq must be able
          * to accept all calls to ->verify and ->setpolicy for this CPU
          */
@@ -1371,11 +1354,10 @@ static int __cpufreq_remove_dev_prepare(struct device *dev,
                         pr_err("%s: Failed to stop governor\n", __func__);
                         return ret;
                 }
-        }
 
-        if (!cpufreq_driver->setpolicy)
                 strncpy(per_cpu(cpufreq_cpu_governor, cpu),
                         policy->governor->name, CPUFREQ_NAME_LEN);
+        }
 
         down_read(&policy->rwsem);
         cpus = cpumask_weight(policy->cpus);
@@ -1416,9 +1398,10 @@ static int __cpufreq_remove_dev_finish(struct device *dev,
         unsigned long flags;
         struct cpufreq_policy *policy;
 
-        read_lock_irqsave(&cpufreq_driver_lock, flags);
+        write_lock_irqsave(&cpufreq_driver_lock, flags);
         policy = per_cpu(cpufreq_cpu_data, cpu);
-        read_unlock_irqrestore(&cpufreq_driver_lock, flags);
+        per_cpu(cpufreq_cpu_data, cpu) = NULL;
+        write_unlock_irqrestore(&cpufreq_driver_lock, flags);
 
         if (!policy) {
                 pr_debug("%s: No cpu_data found\n", __func__);
@@ -1473,7 +1456,6 @@ static int __cpufreq_remove_dev_finish(struct device *dev,
                 }
         }
 
-        per_cpu(cpufreq_cpu_data, cpu) = NULL;
         return 0;
 }
 
@@ -1510,30 +1492,23 @@ static void handle_update(struct work_struct *work)
 /**
  *      cpufreq_out_of_sync - If actual and saved CPU frequency differs, we're
  *      in deep trouble.
- *      @cpu: cpu number
- *      @old_freq: CPU frequency the kernel thinks the CPU runs at
+ *      @policy: policy managing CPUs
  *      @new_freq: CPU frequency the CPU actually runs at
  *
  *      We adjust to current frequency first, and need to clean up later.
  *      So either call to cpufreq_update_policy() or schedule handle_update()).
  */
-static void cpufreq_out_of_sync(unsigned int cpu, unsigned int old_freq,
+static void cpufreq_out_of_sync(struct cpufreq_policy *policy,
                                 unsigned int new_freq)
 {
-        struct cpufreq_policy *policy;
         struct cpufreq_freqs freqs;
-        unsigned long flags;
 
         pr_debug("Warning: CPU frequency out of sync: cpufreq and timing core thinks of %u, is %u kHz\n",
-                 old_freq, new_freq);
+                 policy->cur, new_freq);
 
-        freqs.old = old_freq;
+        freqs.old = policy->cur;
         freqs.new = new_freq;
 
-        read_lock_irqsave(&cpufreq_driver_lock, flags);
-        policy = per_cpu(cpufreq_cpu_data, cpu);
-        read_unlock_irqrestore(&cpufreq_driver_lock, flags);
-
         cpufreq_freq_transition_begin(policy, &freqs);
         cpufreq_freq_transition_end(policy, &freqs, 0);
 }
@@ -1583,22 +1558,21 @@ unsigned int cpufreq_quick_get_max(unsigned int cpu)
 }
 EXPORT_SYMBOL(cpufreq_quick_get_max);
 
-static unsigned int __cpufreq_get(unsigned int cpu)
+static unsigned int __cpufreq_get(struct cpufreq_policy *policy)
 {
-        struct cpufreq_policy *policy = per_cpu(cpufreq_cpu_data, cpu);
         unsigned int ret_freq = 0;
 
         if (!cpufreq_driver->get)
                 return ret_freq;
 
-        ret_freq = cpufreq_driver->get(cpu);
+        ret_freq = cpufreq_driver->get(policy->cpu);
 
         if (ret_freq && policy->cur &&
                 !(cpufreq_driver->flags & CPUFREQ_CONST_LOOPS)) {
                 /* verify no discrepancy between actual and
                                         saved value exists */
                 if (unlikely(ret_freq != policy->cur)) {
-                        cpufreq_out_of_sync(cpu, policy->cur, ret_freq);
+                        cpufreq_out_of_sync(policy, ret_freq);
                         schedule_work(&policy->update);
                 }
         }
@@ -1619,7 +1593,7 @@ unsigned int cpufreq_get(unsigned int cpu)
 
         if (policy) {
                 down_read(&policy->rwsem);
-                ret_freq = __cpufreq_get(cpu);
+                ret_freq = __cpufreq_get(policy);
                 up_read(&policy->rwsem);
 
                 cpufreq_cpu_put(policy);
@@ -1682,7 +1656,7 @@ void cpufreq_suspend(void)
 
         pr_debug("%s: Suspending Governors\n", __func__);
 
-        list_for_each_entry(policy, &cpufreq_policy_list, policy_list) {
+        for_each_policy(policy) {
                 if (__cpufreq_governor(policy, CPUFREQ_GOV_STOP))
                         pr_err("%s: Failed to stop governor for policy: %p\n",
                                 __func__, policy);
@@ -1716,7 +1690,7 @@ void cpufreq_resume(void)
 
         pr_debug("%s: Resuming Governors\n", __func__);
 
-        list_for_each_entry(policy, &cpufreq_policy_list, policy_list) {
+        for_each_policy(policy) {
                 if (cpufreq_driver->resume && cpufreq_driver->resume(policy))
                         pr_err("%s: Failed to resume driver: %p\n", __func__,
                                 policy);
@@ -2006,10 +1980,6 @@ int cpufreq_driver_target(struct cpufreq_policy *policy,
 }
 EXPORT_SYMBOL_GPL(cpufreq_driver_target);
 
-/*
- * when "event" is CPUFREQ_GOV_LIMITS
- */
-
 static int __cpufreq_governor(struct cpufreq_policy *policy,
                                         unsigned int event)
 {
@@ -2107,7 +2077,7 @@ int cpufreq_register_governor(struct cpufreq_governor *governor)
 
         governor->initialized = 0;
         err = -EBUSY;
-        if (__find_governor(governor->name) == NULL) {
+        if (!find_governor(governor->name)) {
                 err = 0;
                 list_add(&governor->governor_list, &cpufreq_governor_list);
         }
@@ -2307,8 +2277,7 @@ int cpufreq_update_policy(unsigned int cpu)
                         policy->cur = new_policy.cur;
                 } else {
                         if (policy->cur != new_policy.cur && has_target())
-                                cpufreq_out_of_sync(cpu, policy->cur,
-                                                                new_policy.cur);
+                                cpufreq_out_of_sync(policy, new_policy.cur);
                 }
         }
 
@@ -2364,7 +2333,7 @@ static int cpufreq_boost_set_sw(int state)
         struct cpufreq_policy *policy;
         int ret = -EINVAL;
 
-        list_for_each_entry(policy, &cpufreq_policy_list, policy_list) {
+        for_each_policy(policy) {
                 freq_table = cpufreq_frequency_get_table(policy->cpu);
                 if (freq_table) {
                         ret = cpufreq_frequency_table_cpuinfo(policy,
@@ -2454,9 +2423,6 @@ int cpufreq_register_driver(struct cpufreq_driver *driver_data)
 
         pr_debug("trying to register driver %s\n", driver_data->name);
 
-        if (driver_data->setpolicy)
-                driver_data->flags |= CPUFREQ_CONST_LOOPS;
-
         write_lock_irqsave(&cpufreq_driver_lock, flags);
         if (cpufreq_driver) {
                 write_unlock_irqrestore(&cpufreq_driver_lock, flags);
@@ -2465,6 +2431,9 @@ int cpufreq_register_driver(struct cpufreq_driver *driver_data)
         cpufreq_driver = driver_data;
         write_unlock_irqrestore(&cpufreq_driver_lock, flags);
 
+        if (driver_data->setpolicy)
+                driver_data->flags |= CPUFREQ_CONST_LOOPS;
+
         if (cpufreq_boost_supported()) {
                 /*
                  * Check if driver provides function to enable boost -
@@ -2485,23 +2454,12 @@ int cpufreq_register_driver(struct cpufreq_driver *driver_data)
         if (ret)
                 goto err_boost_unreg;
 
-        if (!(cpufreq_driver->flags & CPUFREQ_STICKY)) {
-                int i;
-                ret = -ENODEV;
-
-                /* check for at least one working CPU */
-                for (i = 0; i < nr_cpu_ids; i++)
-                        if (cpu_possible(i) && per_cpu(cpufreq_cpu_data, i)) {
-                                ret = 0;
-                                break;
-                        }
-
+        if (!(cpufreq_driver->flags & CPUFREQ_STICKY) &&
+            list_empty(&cpufreq_policy_list)) {
                 /* if all ->init() calls failed, unregister */
-                if (ret) {
-                        pr_debug("no CPU initialized for driver %s\n",
-                                 driver_data->name);
-                        goto err_if_unreg;
-                }
+                pr_debug("%s: No CPU initialized for driver %s\n", __func__,
+                         driver_data->name);
+                goto err_if_unreg;
         }
 
         register_hotcpu_notifier(&cpufreq_cpu_notifier);
@@ -2556,6 +2514,14 @@ int cpufreq_unregister_driver(struct cpufreq_driver *driver)
 }
 EXPORT_SYMBOL_GPL(cpufreq_unregister_driver);
 
+/*
+ * Stop cpufreq at shutdown to make sure it isn't holding any locks
+ * or mutexes when secondary CPUs are halted.
+ */
+static struct syscore_ops cpufreq_syscore_ops = {
+        .shutdown = cpufreq_suspend,
+};
+
 static int __init cpufreq_core_init(void)
 {
         if (cpufreq_disabled())
@@ -2564,6 +2530,8 @@ static int __init cpufreq_core_init(void)
         cpufreq_global_kobject = kobject_create();
         BUG_ON(!cpufreq_global_kobject);
 
+        register_syscore_ops(&cpufreq_syscore_ops);
+
         return 0;
 }
 core_initcall(cpufreq_core_init);
diff --git a/drivers/cpufreq/cpufreq_stats.c b/drivers/cpufreq/cpufreq_stats.c
index 0cd9b4dcef99..5e370a30a964 100644
--- a/drivers/cpufreq/cpufreq_stats.c
+++ b/drivers/cpufreq/cpufreq_stats.c
@@ -18,7 +18,6 @@
 static spinlock_t cpufreq_stats_lock;
 
 struct cpufreq_stats {
-        unsigned int cpu;
         unsigned int total_trans;
         unsigned long long last_time;
         unsigned int max_state;
@@ -31,50 +30,33 @@ struct cpufreq_stats {
 #endif
 };
 
-static DEFINE_PER_CPU(struct cpufreq_stats *, cpufreq_stats_table);
-
-struct cpufreq_stats_attribute {
-        struct attribute attr;
-        ssize_t(*show) (struct cpufreq_stats *, char *);
-};
-
-static int cpufreq_stats_update(unsigned int cpu)
+static int cpufreq_stats_update(struct cpufreq_stats *stats)
 {
-        struct cpufreq_stats *stat;
-        unsigned long long cur_time;
+        unsigned long long cur_time = get_jiffies_64();
 
-        cur_time = get_jiffies_64();
         spin_lock(&cpufreq_stats_lock);
-        stat = per_cpu(cpufreq_stats_table, cpu);
-        if (stat->time_in_state)
-                stat->time_in_state[stat->last_index] +=
-                        cur_time - stat->last_time;
-        stat->last_time = cur_time;
+        stats->time_in_state[stats->last_index] += cur_time - stats->last_time;
+        stats->last_time = cur_time;
         spin_unlock(&cpufreq_stats_lock);
         return 0;
 }
 
 static ssize_t show_total_trans(struct cpufreq_policy *policy, char *buf)
 {
-        struct cpufreq_stats *stat = per_cpu(cpufreq_stats_table, policy->cpu);
-        if (!stat)
-                return 0;
-        return sprintf(buf, "%d\n",
-                        per_cpu(cpufreq_stats_table, stat->cpu)->total_trans);
+        return sprintf(buf, "%d\n", policy->stats->total_trans);
 }
 
 static ssize_t show_time_in_state(struct cpufreq_policy *policy, char *buf)
 {
+        struct cpufreq_stats *stats = policy->stats;
         ssize_t len = 0;
         int i;
-        struct cpufreq_stats *stat = per_cpu(cpufreq_stats_table, policy->cpu);
-        if (!stat)
-                return 0;
-        cpufreq_stats_update(stat->cpu);
-        for (i = 0; i < stat->state_num; i++) {
-                len += sprintf(buf + len, "%u %llu\n", stat->freq_table[i],
+
+        cpufreq_stats_update(stats);
+        for (i = 0; i < stats->state_num; i++) {
+                len += sprintf(buf + len, "%u %llu\n", stats->freq_table[i],
                         (unsigned long long)
-                        jiffies_64_to_clock_t(stat->time_in_state[i]));
+                        jiffies_64_to_clock_t(stats->time_in_state[i]));
         }
         return len;
 }
@@ -82,38 +64,35 @@ static ssize_t show_time_in_state(struct cpufreq_policy *policy, char *buf)
 #ifdef CONFIG_CPU_FREQ_STAT_DETAILS
 static ssize_t show_trans_table(struct cpufreq_policy *policy, char *buf)
 {
+        struct cpufreq_stats *stats = policy->stats;
         ssize_t len = 0;
         int i, j;
 
-        struct cpufreq_stats *stat = per_cpu(cpufreq_stats_table, policy->cpu);
-        if (!stat)
-                return 0;
-        cpufreq_stats_update(stat->cpu);
         len += snprintf(buf + len, PAGE_SIZE - len, "   From  :    To\n");
         len += snprintf(buf + len, PAGE_SIZE - len, "         : ");
-        for (i = 0; i < stat->state_num; i++) {
+        for (i = 0; i < stats->state_num; i++) {
                 if (len >= PAGE_SIZE)
                         break;
                 len += snprintf(buf + len, PAGE_SIZE - len, "%9u ",
-                                stat->freq_table[i]);
+                                stats->freq_table[i]);
         }
         if (len >= PAGE_SIZE)
                 return PAGE_SIZE;
 
         len += snprintf(buf + len, PAGE_SIZE - len, "\n");
 
-        for (i = 0; i < stat->state_num; i++) {
+        for (i = 0; i < stats->state_num; i++) {
                 if (len >= PAGE_SIZE)
                         break;
 
                 len += snprintf(buf + len, PAGE_SIZE - len, "%9u: ",
-                                stat->freq_table[i]);
+                                stats->freq_table[i]);
 
-                for (j = 0; j < stat->state_num; j++) {
+                for (j = 0; j < stats->state_num; j++) {
                         if (len >= PAGE_SIZE)
                                 break;
                         len += snprintf(buf + len, PAGE_SIZE - len, "%9u ",
-                                        stat->trans_table[i*stat->max_state+j]);
+                                        stats->trans_table[i*stats->max_state+j]);
                 }
                 if (len >= PAGE_SIZE)
                         break;
@@ -142,28 +121,29 @@ static struct attribute_group stats_attr_group = {
         .name = "stats"
 };
 
-static int freq_table_get_index(struct cpufreq_stats *stat, unsigned int freq)
+static int freq_table_get_index(struct cpufreq_stats *stats, unsigned int freq)
 {
         int index;
-        for (index = 0; index < stat->max_state; index++)
-                if (stat->freq_table[index] == freq)
+        for (index = 0; index < stats->max_state; index++)
+                if (stats->freq_table[index] == freq)
                         return index;
         return -1;
 }
 
 static void __cpufreq_stats_free_table(struct cpufreq_policy *policy)
 {
-        struct cpufreq_stats *stat = per_cpu(cpufreq_stats_table, policy->cpu);
+        struct cpufreq_stats *stats = policy->stats;
 
-        if (!stat)
+        /* Already freed */
+        if (!stats)
                 return;
 
-        pr_debug("%s: Free stat table\n", __func__);
+        pr_debug("%s: Free stats table\n", __func__);
 
         sysfs_remove_group(&policy->kobj, &stats_attr_group);
-        kfree(stat->time_in_state);
-        kfree(stat);
-        per_cpu(cpufreq_stats_table, policy->cpu) = NULL;
+        kfree(stats->time_in_state);
+        kfree(stats);
+        policy->stats = NULL;
 }
 
 static void cpufreq_stats_free_table(unsigned int cpu)
@@ -174,37 +154,33 @@ static void cpufreq_stats_free_table(unsigned int cpu)
         if (!policy)
                 return;
 
-        if (cpufreq_frequency_get_table(policy->cpu))
-                __cpufreq_stats_free_table(policy);
+        __cpufreq_stats_free_table(policy);
 
         cpufreq_cpu_put(policy);
 }
 
 static int __cpufreq_stats_create_table(struct cpufreq_policy *policy)
 {
-        unsigned int i, count = 0, ret = 0;
-        struct cpufreq_stats *stat;
+        unsigned int i = 0, count = 0, ret = -ENOMEM;
+        struct cpufreq_stats *stats;
         unsigned int alloc_size;
         unsigned int cpu = policy->cpu;
         struct cpufreq_frequency_table *pos, *table;
 
+        /* We need cpufreq table for creating stats table */
         table = cpufreq_frequency_get_table(cpu);
         if (unlikely(!table))
                 return 0;
 
-        if (per_cpu(cpufreq_stats_table, cpu))
-                return -EBUSY;
-        stat = kzalloc(sizeof(*stat), GFP_KERNEL);
-        if ((stat) == NULL)
-                return -ENOMEM;
-
-        ret = sysfs_create_group(&policy->kobj, &stats_attr_group);
-        if (ret)
-                goto error_out;
+        /* stats already initialized */
+        if (policy->stats)
+                return -EEXIST;
 
-        stat->cpu = cpu;
-        per_cpu(cpufreq_stats_table, cpu) = stat;
+        stats = kzalloc(sizeof(*stats), GFP_KERNEL);
+        if (!stats)
+                return -ENOMEM;
 
+        /* Find total allocation size */
         cpufreq_for_each_valid_entry(pos, table)
                 count++;
 
@@ -213,32 +189,40 @@ static int __cpufreq_stats_create_table(struct cpufreq_policy *policy)
 #ifdef CONFIG_CPU_FREQ_STAT_DETAILS
         alloc_size += count * count * sizeof(int);
 #endif
-        stat->max_state = count;
-        stat->time_in_state = kzalloc(alloc_size, GFP_KERNEL);
-        if (!stat->time_in_state) {
-                ret = -ENOMEM;
-                goto error_alloc;
-        }
-        stat->freq_table = (unsigned int *)(stat->time_in_state + count);
+
+        /* Allocate memory for time_in_state/freq_table/trans_table in one go */
+        stats->time_in_state = kzalloc(alloc_size, GFP_KERNEL);
+        if (!stats->time_in_state)
+                goto free_stat;
+
+        stats->freq_table = (unsigned int *)(stats->time_in_state + count);
 
 #ifdef CONFIG_CPU_FREQ_STAT_DETAILS
-        stat->trans_table = stat->freq_table + count;
+        stats->trans_table = stats->freq_table + count;
 #endif
-        i = 0;
+
+        stats->max_state = count;
+
+        /* Find valid-unique entries */
         cpufreq_for_each_valid_entry(pos, table)
-                if (freq_table_get_index(stat, pos->frequency) == -1)
-                        stat->freq_table[i++] = pos->frequency;
-        stat->state_num = i;
-        spin_lock(&cpufreq_stats_lock);
-        stat->last_time = get_jiffies_64();
-        stat->last_index = freq_table_get_index(stat, policy->cur);
-        spin_unlock(&cpufreq_stats_lock);
-        return 0;
-error_alloc:
-        sysfs_remove_group(&policy->kobj, &stats_attr_group);
-error_out:
-        kfree(stat);
-        per_cpu(cpufreq_stats_table, cpu) = NULL;
+                if (freq_table_get_index(stats, pos->frequency) == -1)
+                        stats->freq_table[i++] = pos->frequency;
+
+        stats->state_num = i;
+        stats->last_time = get_jiffies_64();
+        stats->last_index = freq_table_get_index(stats, policy->cur);
+
+        policy->stats = stats;
+        ret = sysfs_create_group(&policy->kobj, &stats_attr_group);
+        if (!ret)
+                return 0;
+
+        /* We failed, release resources */
+        policy->stats = NULL;
+        kfree(stats->time_in_state);
+free_stat:
+        kfree(stats);
+
         return ret;
 }
 
@@ -259,30 +243,12 @@ static void cpufreq_stats_create_table(unsigned int cpu)
         cpufreq_cpu_put(policy);
 }
 
-static void cpufreq_stats_update_policy_cpu(struct cpufreq_policy *policy)
-{
-        struct cpufreq_stats *stat = per_cpu(cpufreq_stats_table,
-                        policy->last_cpu);
-
-        pr_debug("Updating stats_table for new_cpu %u from last_cpu %u\n",
-                        policy->cpu, policy->last_cpu);
-        per_cpu(cpufreq_stats_table, policy->cpu) = per_cpu(cpufreq_stats_table,
-                        policy->last_cpu);
-        per_cpu(cpufreq_stats_table, policy->last_cpu) = NULL;
-        stat->cpu = policy->cpu;
-}
-
 static int cpufreq_stat_notifier_policy(struct notifier_block *nb,
                 unsigned long val, void *data)
 {
         int ret = 0;
         struct cpufreq_policy *policy = data;
 
-        if (val == CPUFREQ_UPDATE_POLICY_CPU) {
-                cpufreq_stats_update_policy_cpu(policy);
-                return 0;
-        }
-
         if (val == CPUFREQ_CREATE_POLICY)
                 ret = __cpufreq_stats_create_table(policy);
         else if (val == CPUFREQ_REMOVE_POLICY)
@@ -295,35 +261,45 @@ static int cpufreq_stat_notifier_trans(struct notifier_block *nb,
                 unsigned long val, void *data)
 {
         struct cpufreq_freqs *freq = data;
-        struct cpufreq_stats *stat;
+        struct cpufreq_policy *policy = cpufreq_cpu_get(freq->cpu);
+        struct cpufreq_stats *stats;
         int old_index, new_index;
 
-        if (val != CPUFREQ_POSTCHANGE)
+        if (!policy) {
+                pr_err("%s: No policy found\n", __func__);
                 return 0;
+        }
 
-        stat = per_cpu(cpufreq_stats_table, freq->cpu);
-        if (!stat)
-                return 0;
+        if (val != CPUFREQ_POSTCHANGE)
+                goto put_policy;
 
-        old_index = stat->last_index;
-        new_index = freq_table_get_index(stat, freq->new);
+        if (!policy->stats) {
+                pr_debug("%s: No stats found\n", __func__);
+                goto put_policy;
+        }
 
-        /* We can't do stat->time_in_state[-1]= .. */
-        if (old_index == -1 || new_index == -1)
-                return 0;
+        stats = policy->stats;
+
+        old_index = stats->last_index;
+        new_index = freq_table_get_index(stats, freq->new);
 
-        cpufreq_stats_update(freq->cpu);
+        /* We can't do stats->time_in_state[-1]= .. */
+        if (old_index == -1 || new_index == -1)
+                goto put_policy;
 
         if (old_index == new_index)
-                return 0;
+                goto put_policy;
 
-        spin_lock(&cpufreq_stats_lock);
-        stat->last_index = new_index;
+        cpufreq_stats_update(stats);
+
+        stats->last_index = new_index;
 #ifdef CONFIG_CPU_FREQ_STAT_DETAILS
-        stat->trans_table[old_index * stat->max_state + new_index]++;
+        stats->trans_table[old_index * stats->max_state + new_index]++;
 #endif
-        stat->total_trans++;
-        spin_unlock(&cpufreq_stats_lock);
+        stats->total_trans++;
+
+put_policy:
+        cpufreq_cpu_put(policy);
         return 0;
 }
 
@@ -374,8 +350,7 @@ static void __exit cpufreq_stats_exit(void)
 }
 
 MODULE_AUTHOR("Zou Nan hai <nanhai.zou@intel.com>");
-MODULE_DESCRIPTION("'cpufreq_stats' - A driver to export cpufreq stats "
-                                "through sysfs filesystem");
+MODULE_DESCRIPTION("Export cpufreq stats via sysfs");
 MODULE_LICENSE("GPL");
 
 module_init(cpufreq_stats_init);
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index 742eefba12c2..872c5772c5d3 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -148,6 +148,8 @@ struct perf_limits {
         int32_t min_perf;
         int max_policy_pct;
         int max_sysfs_pct;
+        int min_policy_pct;
+        int min_sysfs_pct;
 };
 
 static struct perf_limits limits = {
@@ -159,6 +161,8 @@ static struct perf_limits limits = {
         .min_perf = 0,
         .max_policy_pct = 100,
         .max_sysfs_pct = 100,
+        .min_policy_pct = 0,
+        .min_sysfs_pct = 0,
 };
 
 static inline void pid_reset(struct _pid *pid, int setpoint, int busy,
@@ -338,6 +342,33 @@ static void __init intel_pstate_debug_expose_params(void)
                 return sprintf(buf, "%u\n", limits.object);             \
         }
 
+static ssize_t show_turbo_pct(struct kobject *kobj,
+                                struct attribute *attr, char *buf)
+{
+        struct cpudata *cpu;
+        int total, no_turbo, turbo_pct;
+        uint32_t turbo_fp;
+
+        cpu = all_cpu_data[0];
+
+        total = cpu->pstate.turbo_pstate - cpu->pstate.min_pstate + 1;
+        no_turbo = cpu->pstate.max_pstate - cpu->pstate.min_pstate + 1;
+        turbo_fp = div_fp(int_tofp(no_turbo), int_tofp(total));
+        turbo_pct = 100 - fp_toint(mul_fp(turbo_fp, int_tofp(100)));
+        return sprintf(buf, "%u\n", turbo_pct);
+}
+
+static ssize_t show_num_pstates(struct kobject *kobj,
+                                struct attribute *attr, char *buf)
+{
+        struct cpudata *cpu;
+        int total;
+
+        cpu = all_cpu_data[0];
+        total = cpu->pstate.turbo_pstate - cpu->pstate.min_pstate + 1;
+        return sprintf(buf, "%u\n", total);
+}
+
 static ssize_t show_no_turbo(struct kobject *kobj,
                              struct attribute *attr, char *buf)
 {
@@ -404,7 +435,9 @@ static ssize_t store_min_perf_pct(struct kobject *a, struct attribute *b,
         ret = sscanf(buf, "%u", &input);
         if (ret != 1)
                 return -EINVAL;
-        limits.min_perf_pct = clamp_t(int, input, 0 , 100);
+
+        limits.min_sysfs_pct = clamp_t(int, input, 0 , 100);
+        limits.min_perf_pct = max(limits.min_policy_pct, limits.min_sysfs_pct);
         limits.min_perf = div_fp(int_tofp(limits.min_perf_pct), int_tofp(100));
 
         if (hwp_active)
@@ -418,11 +451,15 @@ show_one(min_perf_pct, min_perf_pct);
 define_one_global_rw(no_turbo);
 define_one_global_rw(max_perf_pct);
 define_one_global_rw(min_perf_pct);
+define_one_global_ro(turbo_pct);
+define_one_global_ro(num_pstates);
 
 static struct attribute *intel_pstate_attributes[] = {
         &no_turbo.attr,
         &max_perf_pct.attr,
         &min_perf_pct.attr,
+        &turbo_pct.attr,
+        &num_pstates.attr,
         NULL
 };
 
@@ -825,6 +862,7 @@ static const struct x86_cpu_id intel_pstate_cpu_ids[] = {
         ICPU(0x46, core_params),
         ICPU(0x47, core_params),
         ICPU(0x4c, byt_params),
+        ICPU(0x4e, core_params),
         ICPU(0x4f, core_params),
         ICPU(0x56, core_params),
         {}
@@ -887,7 +925,9 @@ static int intel_pstate_set_policy(struct cpufreq_policy *policy)
         if (!policy->cpuinfo.max_freq)
                 return -ENODEV;
 
-        if (policy->policy == CPUFREQ_POLICY_PERFORMANCE) {
+        if (policy->policy == CPUFREQ_POLICY_PERFORMANCE &&
+            policy->max >= policy->cpuinfo.max_freq) {
+                limits.min_policy_pct = 100;
                 limits.min_perf_pct = 100;
                 limits.min_perf = int_tofp(1);
                 limits.max_policy_pct = 100;
@@ -897,8 +937,9 @@ static int intel_pstate_set_policy(struct cpufreq_policy *policy)
                 return 0;
         }
 
-        limits.min_perf_pct = (policy->min * 100) / policy->cpuinfo.max_freq;
-        limits.min_perf_pct = clamp_t(int, limits.min_perf_pct, 0 , 100);
+        limits.min_policy_pct = (policy->min * 100) / policy->cpuinfo.max_freq;
+        limits.min_policy_pct = clamp_t(int, limits.min_policy_pct, 0 , 100);
+        limits.min_perf_pct = max(limits.min_policy_pct, limits.min_sysfs_pct);
         limits.min_perf = div_fp(int_tofp(limits.min_perf_pct), int_tofp(100));
 
         limits.max_policy_pct = (policy->max * 100) / policy->cpuinfo.max_freq;
@@ -978,6 +1019,7 @@ static struct cpufreq_driver intel_pstate_driver = {
 
 static int __initdata no_load;
 static int __initdata no_hwp;
+static int __initdata hwp_only;
 static unsigned int force_load;
 
 static int intel_pstate_msrs_not_valid(void)
@@ -1175,6 +1217,9 @@ static int __init intel_pstate_init(void)
         if (cpu_has(c,X86_FEATURE_HWP) && !no_hwp)
                 intel_pstate_hwp_enable();
 
+        if (!hwp_active && hwp_only)
+                goto out;
+
         rc = cpufreq_register_driver(&intel_pstate_driver);
         if (rc)
                 goto out;
@@ -1209,6 +1254,8 @@ static int __init intel_pstate_setup(char *str)
                 no_hwp = 1;
         if (!strcmp(str, "force"))
                 force_load = 1;
+        if (!strcmp(str, "hwp_only"))
+                hwp_only = 1;
         return 0;
 }
 early_param("intel_pstate", intel_pstate_setup);
diff --git a/drivers/cpufreq/ls1x-cpufreq.c b/drivers/cpufreq/ls1x-cpufreq.c
index 25fbd6a1374f..f0913eee2f50 100644
--- a/drivers/cpufreq/ls1x-cpufreq.c
+++ b/drivers/cpufreq/ls1x-cpufreq.c
@@ -210,7 +210,6 @@ out:
 static struct platform_driver ls1x_cpufreq_platdrv = {
         .driver = {
                 .name   = "ls1x-cpufreq",
-                .owner  = THIS_MODULE,
         },
         .probe          = ls1x_cpufreq_probe,
         .remove         = ls1x_cpufreq_remove,
diff --git a/drivers/cpufreq/sfi-cpufreq.c b/drivers/cpufreq/sfi-cpufreq.c
new file mode 100644
index 000000000000..ffa3389e535b
--- /dev/null
+++ b/drivers/cpufreq/sfi-cpufreq.c
@@ -0,0 +1,136 @@
+/*
+ *  SFI Performance States Driver
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful, but
+ *  WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  General Public License for more details.
+ *
+ *  Author: Vishwesh M Rudramuni <vishwesh.m.rudramuni@intel.com>
+ *  Author: Srinidhi Kasagar <srinidhi.kasagar@intel.com>
+ */
+
+#include <linux/cpufreq.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/sfi.h>
+#include <linux/slab.h>
+#include <linux/smp.h>
+
+#include <asm/msr.h>
+
+struct cpufreq_frequency_table *freq_table;
+static struct sfi_freq_table_entry *sfi_cpufreq_array;
+static int num_freq_table_entries;
+
+static int sfi_parse_freq(struct sfi_table_header *table)
+{
+        struct sfi_table_simple *sb;
+        struct sfi_freq_table_entry *pentry;
+        int totallen;
+
+        sb = (struct sfi_table_simple *)table;
+        num_freq_table_entries = SFI_GET_NUM_ENTRIES(sb,
+                        struct sfi_freq_table_entry);
+        if (num_freq_table_entries <= 1) {
+                pr_err("No p-states discovered\n");
+                return -ENODEV;
+        }
+
+        pentry = (struct sfi_freq_table_entry *)sb->pentry;
+        totallen = num_freq_table_entries * sizeof(*pentry);
+
+        sfi_cpufreq_array = kzalloc(totallen, GFP_KERNEL);
+        if (!sfi_cpufreq_array)
+                return -ENOMEM;
+
+        memcpy(sfi_cpufreq_array, pentry, totallen);
+
+        return 0;
+}
+
+static int sfi_cpufreq_target(struct cpufreq_policy *policy, unsigned int index)
+{
+        unsigned int next_perf_state = 0; /* Index into perf table */
+        u32 lo, hi;
+
+        next_perf_state = policy->freq_table[index].driver_data;
+
+        rdmsr_on_cpu(policy->cpu, MSR_IA32_PERF_CTL, &lo, &hi);
+        lo = (lo & ~INTEL_PERF_CTL_MASK) |
+                ((u32) sfi_cpufreq_array[next_perf_state].ctrl_val &
+                INTEL_PERF_CTL_MASK);
+        wrmsr_on_cpu(policy->cpu, MSR_IA32_PERF_CTL, lo, hi);
+
+        return 0;
+}
+
+static int sfi_cpufreq_cpu_init(struct cpufreq_policy *policy)
+{
+        policy->shared_type = CPUFREQ_SHARED_TYPE_HW;
+        policy->cpuinfo.transition_latency = 100000;    /* 100us */
+
+        return cpufreq_table_validate_and_show(policy, freq_table);
+}
+
+static struct cpufreq_driver sfi_cpufreq_driver = {
+        .flags          = CPUFREQ_CONST_LOOPS,
+        .verify         = cpufreq_generic_frequency_table_verify,
+        .target_index   = sfi_cpufreq_target,
+        .init           = sfi_cpufreq_cpu_init,
+        .name           = "sfi-cpufreq",
+        .attr           = cpufreq_generic_attr,
+};
+
+static int __init sfi_cpufreq_init(void)
+{
+        int ret, i;
+
+        /* parse the freq table from SFI */
+        ret = sfi_table_parse(SFI_SIG_FREQ, NULL, NULL, sfi_parse_freq);
+        if (ret)
+                return ret;
+
+        freq_table = kzalloc(sizeof(*freq_table) *
+                        (num_freq_table_entries + 1), GFP_KERNEL);
+        if (!freq_table) {
+                ret = -ENOMEM;
+                goto err_free_array;
+        }
+
+        for (i = 0; i < num_freq_table_entries; i++) {
+                freq_table[i].driver_data = i;
+                freq_table[i].frequency = sfi_cpufreq_array[i].freq_mhz * 1000;
+        }
+        freq_table[i].frequency = CPUFREQ_TABLE_END;
+
+        ret = cpufreq_register_driver(&sfi_cpufreq_driver);
+        if (ret)
+                goto err_free_tbl;
+
+        return ret;
+
+err_free_tbl:
+        kfree(freq_table);
+err_free_array:
+        kfree(sfi_cpufreq_array);
+        return ret;
+}
+late_initcall(sfi_cpufreq_init);
+
+static void __exit sfi_cpufreq_exit(void)
+{
+        cpufreq_unregister_driver(&sfi_cpufreq_driver);
+        kfree(freq_table);
+        kfree(sfi_cpufreq_array);
+}
+module_exit(sfi_cpufreq_exit);
+
+MODULE_AUTHOR("Vishwesh M Rudramuni <vishwesh.m.rudramuni@intel.com>");
+MODULE_DESCRIPTION("SFI Performance-States Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/cpuidle/cpuidle-big_little.c b/drivers/cpuidle/cpuidle-big_little.c
index e3e225fe6b45..40c34faffe59 100644
--- a/drivers/cpuidle/cpuidle-big_little.c
+++ b/drivers/cpuidle/cpuidle-big_little.c
@@ -182,6 +182,10 @@ static int __init bl_idle_init(void)
          */
         if (!of_match_node(compatible_machine_match, root))
                 return -ENODEV;
+
+        if (!mcpm_is_available())
+                return -EUNATCH;
+
         /*
          * For now the differentiation between little and big cores
          * is based on the part number. A7 cores are considered little
diff --git a/drivers/devfreq/Kconfig b/drivers/devfreq/Kconfig
index 3891f6781298..64281bb2f650 100644
--- a/drivers/devfreq/Kconfig
+++ b/drivers/devfreq/Kconfig
@@ -88,4 +88,16 @@ config ARM_EXYNOS5_BUS_DEVFREQ
           It reads PPMU counters of memory controllers and adjusts the
           operating frequencies and voltages with OPP support.
 
+config ARM_TEGRA_DEVFREQ
+       tristate "Tegra DEVFREQ Driver"
+       depends on ARCH_TEGRA_124_SOC
+       select DEVFREQ_GOV_SIMPLE_ONDEMAND
+       select PM_OPP
+       help
+         This adds the DEVFREQ driver for the Tegra family of SoCs.
+         It reads ACTMON counters of memory controllers and adjusts the
+         operating frequencies and voltages with OPP support.
+
+source "drivers/devfreq/event/Kconfig"
+
 endif # PM_DEVFREQ
diff --git a/drivers/devfreq/Makefile b/drivers/devfreq/Makefile
index 16138c9e0d58..5134f9ee983d 100644
--- a/drivers/devfreq/Makefile
+++ b/drivers/devfreq/Makefile
@@ -1,4 +1,5 @@
 obj-$(CONFIG_PM_DEVFREQ)        += devfreq.o
+obj-$(CONFIG_PM_DEVFREQ_EVENT)  += devfreq-event.o
 obj-$(CONFIG_DEVFREQ_GOV_SIMPLE_ONDEMAND)       += governor_simpleondemand.o
 obj-$(CONFIG_DEVFREQ_GOV_PERFORMANCE)   += governor_performance.o
 obj-$(CONFIG_DEVFREQ_GOV_POWERSAVE)     += governor_powersave.o
@@ -7,3 +8,7 @@ obj-$(CONFIG_DEVFREQ_GOV_USERSPACE)	+= governor_userspace.o
 # DEVFREQ Drivers
 obj-$(CONFIG_ARM_EXYNOS4_BUS_DEVFREQ)   += exynos/
 obj-$(CONFIG_ARM_EXYNOS5_BUS_DEVFREQ)   += exynos/
+obj-$(CONFIG_ARM_TEGRA_DEVFREQ)         += tegra-devfreq.o
+
+# DEVFREQ Event Drivers
+obj-$(CONFIG_PM_DEVFREQ_EVENT)          += event/
diff --git a/drivers/devfreq/devfreq-event.c b/drivers/devfreq/devfreq-event.c
new file mode 100644
index 000000000000..f304a0289eda
--- /dev/null
+++ b/drivers/devfreq/devfreq-event.c
@@ -0,0 +1,494 @@
+/*
+ * devfreq-event: a framework to provide raw data and events of devfreq devices
+ *
+ * Copyright (C) 2015 Samsung Electronics
+ * Author: Chanwoo Choi <cw00.choi@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This driver is based on drivers/devfreq/devfreq.c.
+ */
+
+#include <linux/devfreq-event.h>
+#include <linux/kernel.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/list.h>
+#include <linux/of.h>
+
+static struct class *devfreq_event_class;
+
+/* The list of all devfreq event list */
+static LIST_HEAD(devfreq_event_list);
+static DEFINE_MUTEX(devfreq_event_list_lock);
+
+#define to_devfreq_event(DEV) container_of(DEV, struct devfreq_event_dev, dev)
+
+/**
+ * devfreq_event_enable_edev() - Enable the devfreq-event dev and increase
+ *                               the enable_count of devfreq-event dev.
+ * @edev        : the devfreq-event device
+ *
+ * Note that this function increase the enable_count and enable the
+ * devfreq-event device. The devfreq-event device should be enabled before
+ * using it by devfreq device.
+ */
+int devfreq_event_enable_edev(struct devfreq_event_dev *edev)
+{
+        int ret = 0;
+
+        if (!edev || !edev->desc)
+                return -EINVAL;
+
+        mutex_lock(&edev->lock);
+        if (edev->desc->ops && edev->desc->ops->enable
+                        && edev->enable_count == 0) {
+                ret = edev->desc->ops->enable(edev);
+                if (ret < 0)
+                        goto err;
+        }
+        edev->enable_count++;
+err:
+        mutex_unlock(&edev->lock);
+
+        return ret;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_enable_edev);
+
+/**
+ * devfreq_event_disable_edev() - Disable the devfreq-event dev and decrease
+ *                                the enable_count of the devfreq-event dev.
+ * @edev        : the devfreq-event device
+ *
+ * Note that this function decrease the enable_count and disable the
+ * devfreq-event device. After the devfreq-event device is disabled,
+ * devfreq device can't use the devfreq-event device for get/set/reset
+ * operations.
+ */
+int devfreq_event_disable_edev(struct devfreq_event_dev *edev)
+{
+        int ret = 0;
+
+        if (!edev || !edev->desc)
+                return -EINVAL;
+
+        mutex_lock(&edev->lock);
+        if (edev->enable_count <= 0) {
+                dev_warn(&edev->dev, "unbalanced enable_count\n");
+                ret = -EIO;
+                goto err;
+        }
+
+        if (edev->desc->ops && edev->desc->ops->disable
+                        && edev->enable_count == 1) {
+                ret = edev->desc->ops->disable(edev);
+                if (ret < 0)
+                        goto err;
+        }
+        edev->enable_count--;
+err:
+        mutex_unlock(&edev->lock);
+
+        return ret;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_disable_edev);
+
+/**
+ * devfreq_event_is_enabled() - Check whether devfreq-event dev is enabled or
+ *                              not.
+ * @edev        : the devfreq-event device
+ *
+ * Note that this function check whether devfreq-event dev is enabled or not.
+ * If return true, the devfreq-event dev is enabeld. If return false, the
+ * devfreq-event dev is disabled.
+ */
+bool devfreq_event_is_enabled(struct devfreq_event_dev *edev)
+{
+        bool enabled = false;
+
+        if (!edev || !edev->desc)
+                return enabled;
+
+        mutex_lock(&edev->lock);
+
+        if (edev->enable_count > 0)
+                enabled = true;
+
+        mutex_unlock(&edev->lock);
+
+        return enabled;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_is_enabled);
+
+/**
+ * devfreq_event_set_event() - Set event to devfreq-event dev to start.
+ * @edev        : the devfreq-event device
+ *
+ * Note that this function set the event to the devfreq-event device to start
+ * for getting the event data which could be various event type.
+ */
+int devfreq_event_set_event(struct devfreq_event_dev *edev)
+{
+        int ret;
+
+        if (!edev || !edev->desc)
+                return -EINVAL;
+
+        if (!edev->desc->ops || !edev->desc->ops->set_event)
+                return -EINVAL;
+
+        if (!devfreq_event_is_enabled(edev))
+                return -EPERM;
+
+        mutex_lock(&edev->lock);
+        ret = edev->desc->ops->set_event(edev);
+        mutex_unlock(&edev->lock);
+
+        return ret;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_set_event);
+
+/**
+ * devfreq_event_get_event() - Get {load|total}_count from devfreq-event dev.
+ * @edev        : the devfreq-event device
+ * @edata       : the calculated data of devfreq-event device
+ *
+ * Note that this function get the calculated event data from devfreq-event dev
+ * after stoping the progress of whole sequence of devfreq-event dev.
+ */
+int devfreq_event_get_event(struct devfreq_event_dev *edev,
+                            struct devfreq_event_data *edata)
+{
+        int ret;
+
+        if (!edev || !edev->desc)
+                return -EINVAL;
+
+        if (!edev->desc->ops || !edev->desc->ops->get_event)
+                return -EINVAL;
+
+        if (!devfreq_event_is_enabled(edev))
+                return -EINVAL;
+
+        edata->total_count = edata->load_count = 0;
+
+        mutex_lock(&edev->lock);
+        ret = edev->desc->ops->get_event(edev, edata);
+        if (ret < 0)
+                edata->total_count = edata->load_count = 0;
+        mutex_unlock(&edev->lock);
+
+        return ret;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_get_event);
+
+/**
+ * devfreq_event_reset_event() - Reset all opeations of devfreq-event dev.
+ * @edev        : the devfreq-event device
+ *
+ * Note that this function stop all operations of devfreq-event dev and reset
+ * the current event data to make the devfreq-event device into initial state.
+ */
+int devfreq_event_reset_event(struct devfreq_event_dev *edev)
+{
+        int ret = 0;
+
+        if (!edev || !edev->desc)
+                return -EINVAL;
+
+        if (!devfreq_event_is_enabled(edev))
+                return -EPERM;
+
+        mutex_lock(&edev->lock);
+        if (edev->desc->ops && edev->desc->ops->reset)
+                ret = edev->desc->ops->reset(edev);
+        mutex_unlock(&edev->lock);
+
+        return ret;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_reset_event);
+
+/**
+ * devfreq_event_get_edev_by_phandle() - Get the devfreq-event dev from
+ *                                       devicetree.
+ * @dev         : the pointer to the given device
+ * @index       : the index into list of devfreq-event device
+ *
+ * Note that this function return the pointer of devfreq-event device.
+ */
+struct devfreq_event_dev *devfreq_event_get_edev_by_phandle(struct device *dev,
+                                                      int index)
+{
+        struct device_node *node;
+        struct devfreq_event_dev *edev;
+
+        if (!dev->of_node) {
+                dev_err(dev, "device does not have a device node entry\n");
+                return ERR_PTR(-EINVAL);
+        }
+
+        node = of_parse_phandle(dev->of_node, "devfreq-events", index);
+        if (!node) {
+                dev_err(dev, "failed to get phandle in %s node\n",
+                        dev->of_node->full_name);
+                return ERR_PTR(-ENODEV);
+        }
+
+        mutex_lock(&devfreq_event_list_lock);
+        list_for_each_entry(edev, &devfreq_event_list, node) {
+                if (!strcmp(edev->desc->name, node->name))
+                        goto out;
+        }
+        edev = NULL;
+out:
+        mutex_unlock(&devfreq_event_list_lock);
+
+        if (!edev) {
+                dev_err(dev, "unable to get devfreq-event device : %s\n",
+                        node->name);
+                of_node_put(node);
+                return ERR_PTR(-ENODEV);
+        }
+
+        of_node_put(node);
+
+        return edev;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_get_edev_by_phandle);
+
+/**
+ * devfreq_event_get_edev_count() - Get the count of devfreq-event dev
+ * @dev         : the pointer to the given device
+ *
+ * Note that this function return the count of devfreq-event devices.
+ */
+int devfreq_event_get_edev_count(struct device *dev)
+{
+        int count;
+
+        if (!dev->of_node) {
+                dev_err(dev, "device does not have a device node entry\n");
+                return -EINVAL;
+        }
+
+        count = of_property_count_elems_of_size(dev->of_node, "devfreq-events",
+                                                sizeof(u32));
+        if (count < 0 ) {
+                dev_err(dev,
+                        "failed to get the count of devfreq-event in %s node\n",
+                        dev->of_node->full_name);
+                return count;
+        }
+
+        return count;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_get_edev_count);
+
+static void devfreq_event_release_edev(struct device *dev)
+{
+        struct devfreq_event_dev *edev = to_devfreq_event(dev);
+
+        kfree(edev);
+}
+
+/**
+ * devfreq_event_add_edev() - Add new devfreq-event device.
+ * @dev         : the device owning the devfreq-event device being created
+ * @desc        : the devfreq-event device's decriptor which include essential
+ *                data for devfreq-event device.
+ *
+ * Note that this function add new devfreq-event device to devfreq-event class
+ * list and register the device of the devfreq-event device.
+ */
+struct devfreq_event_dev *devfreq_event_add_edev(struct device *dev,
+                                                struct devfreq_event_desc *desc)
+{
+        struct devfreq_event_dev *edev;
+        static atomic_t event_no = ATOMIC_INIT(0);
+        int ret;
+
+        if (!dev || !desc)
+                return ERR_PTR(-EINVAL);
+
+        if (!desc->name || !desc->ops)
+                return ERR_PTR(-EINVAL);
+
+        if (!desc->ops->set_event || !desc->ops->get_event)
+                return ERR_PTR(-EINVAL);
+
+        edev = kzalloc(sizeof(struct devfreq_event_dev), GFP_KERNEL);
+        if (!edev)
+                return ERR_PTR(-ENOMEM);
+
+        mutex_init(&edev->lock);
+        edev->desc = desc;
+        edev->enable_count = 0;
+        edev->dev.parent = dev;
+        edev->dev.class = devfreq_event_class;
+        edev->dev.release = devfreq_event_release_edev;
+
+        dev_set_name(&edev->dev, "event.%d", atomic_inc_return(&event_no) - 1);
+        ret = device_register(&edev->dev);
+        if (ret < 0) {
+                put_device(&edev->dev);
+                return ERR_PTR(ret);
+        }
+        dev_set_drvdata(&edev->dev, edev);
+
+        INIT_LIST_HEAD(&edev->node);
+
+        mutex_lock(&devfreq_event_list_lock);
+        list_add(&edev->node, &devfreq_event_list);
+        mutex_unlock(&devfreq_event_list_lock);
+
+        return edev;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_add_edev);
+
+/**
+ * devfreq_event_remove_edev() - Remove the devfreq-event device registered.
+ * @dev         : the devfreq-event device
+ *
+ * Note that this function remove the registered devfreq-event device.
+ */
+int devfreq_event_remove_edev(struct devfreq_event_dev *edev)
+{
+        if (!edev)
+                return -EINVAL;
+
+        WARN_ON(edev->enable_count);
+
+        mutex_lock(&devfreq_event_list_lock);
+        list_del(&edev->node);
+        mutex_unlock(&devfreq_event_list_lock);
+
+        device_unregister(&edev->dev);
+
+        return 0;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_remove_edev);
+
+static int devm_devfreq_event_match(struct device *dev, void *res, void *data)
+{
+        struct devfreq_event_dev **r = res;
+
+        if (WARN_ON(!r || !*r))
+                return 0;
+
+        return *r == data;
+}
+
+static void devm_devfreq_event_release(struct device *dev, void *res)
+{
+        devfreq_event_remove_edev(*(struct devfreq_event_dev **)res);
+}
+
+/**
+ * devm_devfreq_event_add_edev() - Resource-managed devfreq_event_add_edev()
+ * @dev         : the device owning the devfreq-event device being created
+ * @desc        : the devfreq-event device's decriptor which include essential
+ *                data for devfreq-event device.
+ *
+ * Note that this function manages automatically the memory of devfreq-event
+ * device using device resource management and simplify the free operation
+ * for memory of devfreq-event device.
+ */
+struct devfreq_event_dev *devm_devfreq_event_add_edev(struct device *dev,
+                                                struct devfreq_event_desc *desc)
+{
+        struct devfreq_event_dev **ptr, *edev;
+
+        ptr = devres_alloc(devm_devfreq_event_release, sizeof(*ptr), GFP_KERNEL);
+        if (!ptr)
+                return ERR_PTR(-ENOMEM);
+
+        edev = devfreq_event_add_edev(dev, desc);
+        if (IS_ERR(edev)) {
+                devres_free(ptr);
+                return ERR_PTR(-ENOMEM);
+        }
+
+        *ptr = edev;
+        devres_add(dev, ptr);
+
+        return edev;
+}
+EXPORT_SYMBOL_GPL(devm_devfreq_event_add_edev);
+
+/**
+ * devm_devfreq_event_remove_edev()- Resource-managed devfreq_event_remove_edev()
+ * @dev         : the device owning the devfreq-event device being created
+ * @edev        : the devfreq-event device
+ *
+ * Note that this function manages automatically the memory of devfreq-event
+ * device using device resource management.
+ */
+void devm_devfreq_event_remove_edev(struct device *dev,
+                                struct devfreq_event_dev *edev)
+{
+        WARN_ON(devres_release(dev, devm_devfreq_event_release,
+                               devm_devfreq_event_match, edev));
+}
+EXPORT_SYMBOL_GPL(devm_devfreq_event_remove_edev);
+
+/*
+ * Device attributes for devfreq-event class.
+ */
+static ssize_t name_show(struct device *dev, struct device_attribute *attr,
+                         char *buf)
+{
+        struct devfreq_event_dev *edev = to_devfreq_event(dev);
+
+        if (!edev || !edev->desc)
+                return -EINVAL;
+
+        return sprintf(buf, "%s\n", edev->desc->name);
+}
+static DEVICE_ATTR_RO(name);
+
+static ssize_t enable_count_show(struct device *dev,
+                                  struct device_attribute *attr, char *buf)
+{
+        struct devfreq_event_dev *edev = to_devfreq_event(dev);
+
+        if (!edev || !edev->desc)
+                return -EINVAL;
+
+        return sprintf(buf, "%d\n", edev->enable_count);
+}
+static DEVICE_ATTR_RO(enable_count);
+
+static struct attribute *devfreq_event_attrs[] = {
+        &dev_attr_name.attr,
+        &dev_attr_enable_count.attr,
+        NULL,
+};
+ATTRIBUTE_GROUPS(devfreq_event);
+
+static int __init devfreq_event_init(void)
+{
+        devfreq_event_class = class_create(THIS_MODULE, "devfreq-event");
+        if (IS_ERR(devfreq_event_class)) {
+                pr_err("%s: couldn't create class\n", __FILE__);
+                return PTR_ERR(devfreq_event_class);
+        }
+
+        devfreq_event_class->dev_groups = devfreq_event_groups;
+
+        return 0;
+}
+subsys_initcall(devfreq_event_init);
+
+static void __exit devfreq_event_exit(void)
+{
+        class_destroy(devfreq_event_class);
+}
+module_exit(devfreq_event_exit);
+
+MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
+MODULE_DESCRIPTION("DEVFREQ-Event class support");
+MODULE_LICENSE("GPL");
diff --git a/drivers/devfreq/event/Kconfig b/drivers/devfreq/event/Kconfig
new file mode 100644
index 000000000000..a11720affc31
--- /dev/null
+++ b/drivers/devfreq/event/Kconfig
@@ -0,0 +1,25 @@
+menuconfig PM_DEVFREQ_EVENT
+        bool "DEVFREQ-Event device Support"
+        help
+          The devfreq-event device provide the raw data and events which
+          indicate the current state of devfreq-event device. The provided
+          data from devfreq-event device is used to monitor the state of
+          device and determine the suitable size of resource to reduce the
+          wasted resource.
+
+          The devfreq-event device can support the various type of events
+          (e.g., raw data, utilization, latency, bandwidth). The events
+          may be used by devfreq governor and other subsystem.
+
+if PM_DEVFREQ_EVENT
+
+config DEVFREQ_EVENT_EXYNOS_PPMU
+        bool "EXYNOS PPMU (Platform Performance Monitoring Unit) DEVFREQ event Driver"
+        depends on ARCH_EXYNOS
+        select PM_OPP
+        help
+          This add the devfreq-event driver for Exynos SoC. It provides PPMU
+          (Platform Performance Monitoring Unit) counters to estimate the
+          utilization of each module.
+
+endif # PM_DEVFREQ_EVENT
diff --git a/drivers/devfreq/event/Makefile b/drivers/devfreq/event/Makefile
new file mode 100644
index 000000000000..be146ead79cf
--- /dev/null
+++ b/drivers/devfreq/event/Makefile
@@ -0,0 +1,2 @@
+# Exynos DEVFREQ Event Drivers
+obj-$(CONFIG_DEVFREQ_EVENT_EXYNOS_PPMU) += exynos-ppmu.o
diff --git a/drivers/devfreq/event/exynos-ppmu.c b/drivers/devfreq/event/exynos-ppmu.c
new file mode 100644
index 000000000000..135be0aada9d
--- /dev/null
+++ b/drivers/devfreq/event/exynos-ppmu.c
@@ -0,0 +1,374 @@
+/*
+ * exynos_ppmu.c - EXYNOS PPMU (Platform Performance Monitoring Unit) support
+ *
+ * Copyright (c) 2014 Samsung Electronics Co., Ltd.
+ * Author : Chanwoo Choi <cw00.choi@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This driver is based on drivers/devfreq/exynos/exynos_ppmu.c
+ */
+
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/suspend.h>
+#include <linux/devfreq-event.h>
+
+#include "exynos-ppmu.h"
+
+struct exynos_ppmu_data {
+        void __iomem *base;
+        struct clk *clk;
+};
+
+struct exynos_ppmu {
+        struct devfreq_event_dev **edev;
+        struct devfreq_event_desc *desc;
+        unsigned int num_events;
+
+        struct device *dev;
+        struct mutex lock;
+
+        struct exynos_ppmu_data ppmu;
+};
+
+#define PPMU_EVENT(name)                        \
+        { "ppmu-event0-"#name, PPMU_PMNCNT0 },  \
+        { "ppmu-event1-"#name, PPMU_PMNCNT1 },  \
+        { "ppmu-event2-"#name, PPMU_PMNCNT2 },  \
+        { "ppmu-event3-"#name, PPMU_PMNCNT3 }
+
+struct __exynos_ppmu_events {
+        char *name;
+        int id;
+} ppmu_events[] = {
+        /* For Exynos3250, Exynos4 and Exynos5260 */
+        PPMU_EVENT(g3d),
+        PPMU_EVENT(fsys),
+
+        /* For Exynos4 SoCs and Exynos3250 */
+        PPMU_EVENT(dmc0),
+        PPMU_EVENT(dmc1),
+        PPMU_EVENT(cpu),
+        PPMU_EVENT(rightbus),
+        PPMU_EVENT(leftbus),
+        PPMU_EVENT(lcd0),
+        PPMU_EVENT(camif),
+
+        /* Only for Exynos3250 and Exynos5260 */
+        PPMU_EVENT(mfc),
+
+        /* Only for Exynos4 SoCs */
+        PPMU_EVENT(mfc-left),
+        PPMU_EVENT(mfc-right),
+
+        /* Only for Exynos5260 SoCs */
+        PPMU_EVENT(drex0-s0),
+        PPMU_EVENT(drex0-s1),
+        PPMU_EVENT(drex1-s0),
+        PPMU_EVENT(drex1-s1),
+        PPMU_EVENT(eagle),
+        PPMU_EVENT(kfc),
+        PPMU_EVENT(isp),
+        PPMU_EVENT(fimc),
+        PPMU_EVENT(gscl),
+        PPMU_EVENT(mscl),
+        PPMU_EVENT(fimd0x),
+        PPMU_EVENT(fimd1x),
+        { /* sentinel */ },
+};
+
+static int exynos_ppmu_find_ppmu_id(struct devfreq_event_dev *edev)
+{
+        int i;
+
+        for (i = 0; i < ARRAY_SIZE(ppmu_events); i++)
+                if (!strcmp(edev->desc->name, ppmu_events[i].name))
+                        return ppmu_events[i].id;
+
+        return -EINVAL;
+}
+
+static int exynos_ppmu_disable(struct devfreq_event_dev *edev)
+{
+        struct exynos_ppmu *info = devfreq_event_get_drvdata(edev);
+        u32 pmnc;
+
+        /* Disable all counters */
+        __raw_writel(PPMU_CCNT_MASK |
+                     PPMU_PMCNT0_MASK |
+                     PPMU_PMCNT1_MASK |
+                     PPMU_PMCNT2_MASK |
+                     PPMU_PMCNT3_MASK,
+                     info->ppmu.base + PPMU_CNTENC);
+
+        /* Disable PPMU */
+        pmnc = __raw_readl(info->ppmu.base + PPMU_PMNC);
+        pmnc &= ~PPMU_PMNC_ENABLE_MASK;
+        __raw_writel(pmnc, info->ppmu.base + PPMU_PMNC);
+
+        return 0;
+}
+
+static int exynos_ppmu_set_event(struct devfreq_event_dev *edev)
+{
+        struct exynos_ppmu *info = devfreq_event_get_drvdata(edev);
+        int id = exynos_ppmu_find_ppmu_id(edev);
+        u32 pmnc, cntens;
+
+        if (id < 0)
+                return id;
+
+        /* Enable specific counter */
+        cntens = __raw_readl(info->ppmu.base + PPMU_CNTENS);
+        cntens |= (PPMU_CCNT_MASK | (PPMU_ENABLE << id));
+        __raw_writel(cntens, info->ppmu.base + PPMU_CNTENS);
+
+        /* Set the event of Read/Write data count  */
+        __raw_writel(PPMU_RO_DATA_CNT | PPMU_WO_DATA_CNT,
+                        info->ppmu.base + PPMU_BEVTxSEL(id));
+
+        /* Reset cycle counter/performance counter and enable PPMU */
+        pmnc = __raw_readl(info->ppmu.base + PPMU_PMNC);
+        pmnc &= ~(PPMU_PMNC_ENABLE_MASK
+                        | PPMU_PMNC_COUNTER_RESET_MASK
+                        | PPMU_PMNC_CC_RESET_MASK);
+        pmnc |= (PPMU_ENABLE << PPMU_PMNC_ENABLE_SHIFT);
+        pmnc |= (PPMU_ENABLE << PPMU_PMNC_COUNTER_RESET_SHIFT);
+        pmnc |= (PPMU_ENABLE << PPMU_PMNC_CC_RESET_SHIFT);
+        __raw_writel(pmnc, info->ppmu.base + PPMU_PMNC);
+
+        return 0;
+}
+
+static int exynos_ppmu_get_event(struct devfreq_event_dev *edev,
+                                struct devfreq_event_data *edata)
+{
+        struct exynos_ppmu *info = devfreq_event_get_drvdata(edev);
+        int id = exynos_ppmu_find_ppmu_id(edev);
+        u32 pmnc, cntenc;
+
+        if (id < 0)
+                return -EINVAL;
+
+        /* Disable PPMU */
+        pmnc = __raw_readl(info->ppmu.base + PPMU_PMNC);
+        pmnc &= ~PPMU_PMNC_ENABLE_MASK;
+        __raw_writel(pmnc, info->ppmu.base + PPMU_PMNC);
+
+        /* Read cycle count */
+        edata->total_count = __raw_readl(info->ppmu.base + PPMU_CCNT);
+
+        /* Read performance count */
+        switch (id) {
+        case PPMU_PMNCNT0:
+        case PPMU_PMNCNT1:
+        case PPMU_PMNCNT2:
+                edata->load_count
+                        = __raw_readl(info->ppmu.base + PPMU_PMNCT(id));
+                break;
+        case PPMU_PMNCNT3:
+                edata->load_count =
+                        ((__raw_readl(info->ppmu.base + PPMU_PMCNT3_HIGH) << 8)
+                        | __raw_readl(info->ppmu.base + PPMU_PMCNT3_LOW));
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        /* Disable specific counter */
+        cntenc = __raw_readl(info->ppmu.base + PPMU_CNTENC);
+        cntenc |= (PPMU_CCNT_MASK | (PPMU_ENABLE << id));
+        __raw_writel(cntenc, info->ppmu.base + PPMU_CNTENC);
+
+        dev_dbg(&edev->dev, "%s (event: %ld/%ld)\n", edev->desc->name,
+                                        edata->load_count, edata->total_count);
+
+        return 0;
+}
+
+static struct devfreq_event_ops exynos_ppmu_ops = {
+        .disable = exynos_ppmu_disable,
+        .set_event = exynos_ppmu_set_event,
+        .get_event = exynos_ppmu_get_event,
+};
+
+static int of_get_devfreq_events(struct device_node *np,
+                                 struct exynos_ppmu *info)
+{
+        struct devfreq_event_desc *desc;
+        struct device *dev = info->dev;
+        struct device_node *events_np, *node;
+        int i, j, count;
+
+        events_np = of_get_child_by_name(np, "events");
+        if (!events_np) {
+                dev_err(dev,
+                        "failed to get child node of devfreq-event devices\n");
+                return -EINVAL;
+        }
+
+        count = of_get_child_count(events_np);
+        desc = devm_kzalloc(dev, sizeof(*desc) * count, GFP_KERNEL);
+        if (!desc)
+                return -ENOMEM;
+        info->num_events = count;
+
+        j = 0;
+        for_each_child_of_node(events_np, node) {
+                for (i = 0; i < ARRAY_SIZE(ppmu_events); i++) {
+                        if (!ppmu_events[i].name)
+                                continue;
+
+                        if (!of_node_cmp(node->name, ppmu_events[i].name))
+                                break;
+                }
+
+                if (i == ARRAY_SIZE(ppmu_events)) {
+                        dev_warn(dev,
+                                "don't know how to configure events : %s\n",
+                                node->name);
+                        continue;
+                }
+
+                desc[j].ops = &exynos_ppmu_ops;
+                desc[j].driver_data = info;
+
+                of_property_read_string(node, "event-name", &desc[j].name);
+
+                j++;
+
+                of_node_put(node);
+        }
+        info->desc = desc;
+
+        of_node_put(events_np);
+
+        return 0;
+}
+
+static int exynos_ppmu_parse_dt(struct exynos_ppmu *info)
+{
+        struct device *dev = info->dev;
+        struct device_node *np = dev->of_node;
+        int ret = 0;
+
+        if (!np) {
+                dev_err(dev, "failed to find devicetree node\n");
+                return -EINVAL;
+        }
+
+        /* Maps the memory mapped IO to control PPMU register */
+        info->ppmu.base = of_iomap(np, 0);
+        if (IS_ERR_OR_NULL(info->ppmu.base)) {
+                dev_err(dev, "failed to map memory region\n");
+                return -ENOMEM;
+        }
+
+        info->ppmu.clk = devm_clk_get(dev, "ppmu");
+        if (IS_ERR(info->ppmu.clk)) {
+                info->ppmu.clk = NULL;
+                dev_warn(dev, "cannot get PPMU clock\n");
+        }
+
+        ret = of_get_devfreq_events(np, info);
+        if (ret < 0) {
+                dev_err(dev, "failed to parse exynos ppmu dt node\n");
+                goto err;
+        }
+
+        return 0;
+
+err:
+        iounmap(info->ppmu.base);
+
+        return ret;
+}
+
+static int exynos_ppmu_probe(struct platform_device *pdev)
+{
+        struct exynos_ppmu *info;
+        struct devfreq_event_dev **edev;
+        struct devfreq_event_desc *desc;
+        int i, ret = 0, size;
+
+        info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
+        if (!info)
+                return -ENOMEM;
+
+        mutex_init(&info->lock);
+        info->dev = &pdev->dev;
+
+        /* Parse dt data to get resource */
+        ret = exynos_ppmu_parse_dt(info);
+        if (ret < 0) {
+                dev_err(&pdev->dev,
+                        "failed to parse devicetree for resource\n");
+                return ret;
+        }
+        desc = info->desc;
+
+        size = sizeof(struct devfreq_event_dev *) * info->num_events;
+        info->edev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
+        if (!info->edev) {
+                dev_err(&pdev->dev,
+                        "failed to allocate memory devfreq-event devices\n");
+                return -ENOMEM;
+        }
+        edev = info->edev;
+        platform_set_drvdata(pdev, info);
+
+        for (i = 0; i < info->num_events; i++) {
+                edev[i] = devm_devfreq_event_add_edev(&pdev->dev, &desc[i]);
+                if (IS_ERR(edev)) {
+                        ret = PTR_ERR(edev);
+                        dev_err(&pdev->dev,
+                                "failed to add devfreq-event device\n");
+                        goto err;
+                }
+        }
+
+        clk_prepare_enable(info->ppmu.clk);
+
+        return 0;
+err:
+        iounmap(info->ppmu.base);
+
+        return ret;
+}
+
+static int exynos_ppmu_remove(struct platform_device *pdev)
+{
+        struct exynos_ppmu *info = platform_get_drvdata(pdev);
+
+        clk_disable_unprepare(info->ppmu.clk);
+        iounmap(info->ppmu.base);
+
+        return 0;
+}
+
+static struct of_device_id exynos_ppmu_id_match[] = {
+        { .compatible = "samsung,exynos-ppmu", },
+        { /* sentinel */ },
+};
+
+static struct platform_driver exynos_ppmu_driver = {
+        .probe  = exynos_ppmu_probe,
+        .remove = exynos_ppmu_remove,
+        .driver = {
+                .name   = "exynos-ppmu",
+                .of_match_table = exynos_ppmu_id_match,
+        },
+};
+module_platform_driver(exynos_ppmu_driver);
+
+MODULE_DESCRIPTION("Exynos PPMU(Platform Performance Monitoring Unit) driver");
+MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/devfreq/event/exynos-ppmu.h b/drivers/devfreq/event/exynos-ppmu.h
new file mode 100644
index 000000000000..4e831d48c138
--- /dev/null
+++ b/drivers/devfreq/event/exynos-ppmu.h
@@ -0,0 +1,93 @@
+/*
+ * exynos_ppmu.h - EXYNOS PPMU header file
+ *
+ * Copyright (c) 2015 Samsung Electronics Co., Ltd.
+ * Author : Chanwoo Choi <cw00.choi@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __EXYNOS_PPMU_H__
+#define __EXYNOS_PPMU_H__
+
+enum ppmu_state {
+        PPMU_DISABLE = 0,
+        PPMU_ENABLE,
+};
+
+enum ppmu_counter {
+        PPMU_PMNCNT0 = 0,
+        PPMU_PMNCNT1,
+        PPMU_PMNCNT2,
+        PPMU_PMNCNT3,
+
+        PPMU_PMNCNT_MAX,
+};
+
+enum ppmu_event_type {
+        PPMU_RO_BUSY_CYCLE_CNT  = 0x0,
+        PPMU_WO_BUSY_CYCLE_CNT  = 0x1,
+        PPMU_RW_BUSY_CYCLE_CNT  = 0x2,
+        PPMU_RO_REQUEST_CNT     = 0x3,
+        PPMU_WO_REQUEST_CNT     = 0x4,
+        PPMU_RO_DATA_CNT        = 0x5,
+        PPMU_WO_DATA_CNT        = 0x6,
+        PPMU_RO_LATENCY         = 0x12,
+        PPMU_WO_LATENCY         = 0x16,
+};
+
+enum ppmu_reg {
+        /* PPC control register */
+        PPMU_PMNC               = 0x00,
+        PPMU_CNTENS             = 0x10,
+        PPMU_CNTENC             = 0x20,
+        PPMU_INTENS             = 0x30,
+        PPMU_INTENC             = 0x40,
+        PPMU_FLAG               = 0x50,
+
+        /* Cycle Counter and Performance Event Counter Register */
+        PPMU_CCNT               = 0x100,
+        PPMU_PMCNT0             = 0x110,
+        PPMU_PMCNT1             = 0x120,
+        PPMU_PMCNT2             = 0x130,
+        PPMU_PMCNT3_HIGH        = 0x140,
+        PPMU_PMCNT3_LOW         = 0x150,
+
+        /* Bus Event Generator */
+        PPMU_BEVT0SEL           = 0x1000,
+        PPMU_BEVT1SEL           = 0x1100,
+        PPMU_BEVT2SEL           = 0x1200,
+        PPMU_BEVT3SEL           = 0x1300,
+        PPMU_COUNTER_RESET      = 0x1810,
+        PPMU_READ_OVERFLOW_CNT  = 0x1810,
+        PPMU_READ_UNDERFLOW_CNT = 0x1814,
+        PPMU_WRITE_OVERFLOW_CNT = 0x1850,
+        PPMU_WRITE_UNDERFLOW_CNT = 0x1854,
+        PPMU_READ_PENDING_CNT   = 0x1880,
+        PPMU_WRITE_PENDING_CNT  = 0x1884
+};
+
+/* PMNC register */
+#define PPMU_PMNC_CC_RESET_SHIFT        2
+#define PPMU_PMNC_COUNTER_RESET_SHIFT   1
+#define PPMU_PMNC_ENABLE_SHIFT          0
+#define PPMU_PMNC_START_MODE_MASK       BIT(16)
+#define PPMU_PMNC_CC_DIVIDER_MASK       BIT(3)
+#define PPMU_PMNC_CC_RESET_MASK         BIT(2)
+#define PPMU_PMNC_COUNTER_RESET_MASK    BIT(1)
+#define PPMU_PMNC_ENABLE_MASK           BIT(0)
+
+/* CNTENS/CNTENC/INTENS/INTENC/FLAG register */
+#define PPMU_CCNT_MASK                  BIT(31)
+#define PPMU_PMCNT3_MASK                BIT(3)
+#define PPMU_PMCNT2_MASK                BIT(2)
+#define PPMU_PMCNT1_MASK                BIT(1)
+#define PPMU_PMCNT0_MASK                BIT(0)
+
+/* PPMU_PMNCTx/PPMU_BETxSEL registers */
+#define PPMU_PMNCT(x)                   (PPMU_PMCNT0 + (0x10 * x))
+#define PPMU_BEVTxSEL(x)                (PPMU_BEVT0SEL + (0x100 * x))
+
+#endif /* __EXYNOS_PPMU_H__ */
diff --git a/drivers/devfreq/tegra-devfreq.c b/drivers/devfreq/tegra-devfreq.c
new file mode 100644
index 000000000000..34790961af5a
--- /dev/null
+++ b/drivers/devfreq/tegra-devfreq.c
@@ -0,0 +1,718 @@
+/*
+ * A devfreq driver for NVIDIA Tegra SoCs
+ *
+ * Copyright (c) 2014 NVIDIA CORPORATION. All rights reserved.
+ * Copyright (C) 2014 Google, Inc
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <linux/clk.h>
+#include <linux/cpufreq.h>
+#include <linux/devfreq.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pm_opp.h>
+#include <linux/reset.h>
+
+#include "governor.h"
+
+#define ACTMON_GLB_STATUS                                       0x0
+#define ACTMON_GLB_PERIOD_CTRL                                  0x4
+
+#define ACTMON_DEV_CTRL                                         0x0
+#define ACTMON_DEV_CTRL_K_VAL_SHIFT                             10
+#define ACTMON_DEV_CTRL_ENB_PERIODIC                            BIT(18)
+#define ACTMON_DEV_CTRL_AVG_BELOW_WMARK_EN                      BIT(20)
+#define ACTMON_DEV_CTRL_AVG_ABOVE_WMARK_EN                      BIT(21)
+#define ACTMON_DEV_CTRL_CONSECUTIVE_BELOW_WMARK_NUM_SHIFT       23
+#define ACTMON_DEV_CTRL_CONSECUTIVE_ABOVE_WMARK_NUM_SHIFT       26
+#define ACTMON_DEV_CTRL_CONSECUTIVE_BELOW_WMARK_EN              BIT(29)
+#define ACTMON_DEV_CTRL_CONSECUTIVE_ABOVE_WMARK_EN              BIT(30)
+#define ACTMON_DEV_CTRL_ENB                                     BIT(31)
+
+#define ACTMON_DEV_UPPER_WMARK                                  0x4
+#define ACTMON_DEV_LOWER_WMARK                                  0x8
+#define ACTMON_DEV_INIT_AVG                                     0xc
+#define ACTMON_DEV_AVG_UPPER_WMARK                              0x10
+#define ACTMON_DEV_AVG_LOWER_WMARK                              0x14
+#define ACTMON_DEV_COUNT_WEIGHT                                 0x18
+#define ACTMON_DEV_AVG_COUNT                                    0x20
+#define ACTMON_DEV_INTR_STATUS                                  0x24
+
+#define ACTMON_INTR_STATUS_CLEAR                                0xffffffff
+
+#define ACTMON_DEV_INTR_CONSECUTIVE_UPPER                       BIT(31)
+#define ACTMON_DEV_INTR_CONSECUTIVE_LOWER                       BIT(30)
+
+#define ACTMON_ABOVE_WMARK_WINDOW                               1
+#define ACTMON_BELOW_WMARK_WINDOW                               3
+#define ACTMON_BOOST_FREQ_STEP                                  16000
+
+/* activity counter is incremented every 256 memory transactions, and each
+ * transaction takes 4 EMC clocks for Tegra124; So the COUNT_WEIGHT is
+ * 4 * 256 = 1024.
+ */
+#define ACTMON_COUNT_WEIGHT                                     0x400
+
+/*
+ * ACTMON_AVERAGE_WINDOW_LOG2: default value for @DEV_CTRL_K_VAL, which
+ * translates to 2 ^ (K_VAL + 1). ex: 2 ^ (6 + 1) = 128
+ */
+#define ACTMON_AVERAGE_WINDOW_LOG2                      6
+#define ACTMON_SAMPLING_PERIOD                          12 /* ms */
+#define ACTMON_DEFAULT_AVG_BAND                         6  /* 1/10 of % */
+
+#define KHZ                                                     1000
+
+/* Assume that the bus is saturated if the utilization is 25% */
+#define BUS_SATURATION_RATIO                                    25
+
+/**
+ * struct tegra_devfreq_device_config - configuration specific to an ACTMON
+ * device
+ *
+ * Coefficients and thresholds are in %
+ */
+struct tegra_devfreq_device_config {
+        u32             offset;
+        u32             irq_mask;
+
+        unsigned int    boost_up_coeff;
+        unsigned int    boost_down_coeff;
+        unsigned int    boost_up_threshold;
+        unsigned int    boost_down_threshold;
+        u32             avg_dependency_threshold;
+};
+
+enum tegra_actmon_device {
+        MCALL = 0,
+        MCCPU,
+};
+
+static struct tegra_devfreq_device_config actmon_device_configs[] = {
+        {
+                /* MCALL */
+                .offset = 0x1c0,
+                .irq_mask = 1 << 26,
+                .boost_up_coeff = 200,
+                .boost_down_coeff = 50,
+                .boost_up_threshold = 60,
+                .boost_down_threshold = 40,
+        },
+        {
+                /* MCCPU */
+                .offset = 0x200,
+                .irq_mask = 1 << 25,
+                .boost_up_coeff = 800,
+                .boost_down_coeff = 90,
+                .boost_up_threshold = 27,
+                .boost_down_threshold = 10,
+                .avg_dependency_threshold = 50000,
+        },
+};
+
+/**
+ * struct tegra_devfreq_device - state specific to an ACTMON device
+ *
+ * Frequencies are in kHz.
+ */
+struct tegra_devfreq_device {
+        const struct tegra_devfreq_device_config *config;
+
+        void __iomem    *regs;
+        u32             avg_band_freq;
+        u32             avg_count;
+
+        unsigned long   target_freq;
+        unsigned long   boost_freq;
+};
+
+struct tegra_devfreq {
+        struct devfreq          *devfreq;
+
+        struct platform_device  *pdev;
+        struct reset_control    *reset;
+        struct clk              *clock;
+        void __iomem            *regs;
+
+        spinlock_t              lock;
+
+        struct clk              *emc_clock;
+        unsigned long           max_freq;
+        unsigned long           cur_freq;
+        struct notifier_block   rate_change_nb;
+
+        struct tegra_devfreq_device devices[ARRAY_SIZE(actmon_device_configs)];
+};
+
+struct tegra_actmon_emc_ratio {
+        unsigned long cpu_freq;
+        unsigned long emc_freq;
+};
+
+static struct tegra_actmon_emc_ratio actmon_emc_ratios[] = {
+        { 1400000, ULONG_MAX },
+        { 1200000,    750000 },
+        { 1100000,    600000 },
+        { 1000000,    500000 },
+        {  800000,    375000 },
+        {  500000,    200000 },
+        {  250000,    100000 },
+};
+
+static unsigned long do_percent(unsigned long val, unsigned int pct)
+{
+        return val * pct / 100;
+}
+
+static void tegra_devfreq_update_avg_wmark(struct tegra_devfreq_device *dev)
+{
+        u32 avg = dev->avg_count;
+        u32 band = dev->avg_band_freq * ACTMON_SAMPLING_PERIOD;
+
+        writel(avg + band, dev->regs + ACTMON_DEV_AVG_UPPER_WMARK);
+        avg = max(avg, band);
+        writel(avg - band, dev->regs + ACTMON_DEV_AVG_LOWER_WMARK);
+}
+
+static void tegra_devfreq_update_wmark(struct tegra_devfreq *tegra,
+                                       struct tegra_devfreq_device *dev)
+{
+        u32 val = tegra->cur_freq * ACTMON_SAMPLING_PERIOD;
+
+        writel(do_percent(val, dev->config->boost_up_threshold),
+               dev->regs + ACTMON_DEV_UPPER_WMARK);
+
+        writel(do_percent(val, dev->config->boost_down_threshold),
+               dev->regs + ACTMON_DEV_LOWER_WMARK);
+}
+
+static void actmon_write_barrier(struct tegra_devfreq *tegra)
+{
+        /* ensure the update has reached the ACTMON */
+        wmb();
+        readl(tegra->regs + ACTMON_GLB_STATUS);
+}
+
+static irqreturn_t actmon_isr(int irq, void *data)
+{
+        struct tegra_devfreq *tegra = data;
+        struct tegra_devfreq_device *dev = NULL;
+        unsigned long flags;
+        u32 val;
+        unsigned int i;
+
+        val = readl(tegra->regs + ACTMON_GLB_STATUS);
+
+        for (i = 0; i < ARRAY_SIZE(tegra->devices); i++) {
+                if (val & tegra->devices[i].config->irq_mask) {
+                        dev = tegra->devices + i;
+                        break;
+                }
+        }
+
+        if (!dev)
+                return IRQ_NONE;
+
+        spin_lock_irqsave(&tegra->lock, flags);
+
+        dev->avg_count = readl(dev->regs + ACTMON_DEV_AVG_COUNT);
+        tegra_devfreq_update_avg_wmark(dev);
+
+        val = readl(dev->regs + ACTMON_DEV_INTR_STATUS);
+        if (val & ACTMON_DEV_INTR_CONSECUTIVE_UPPER) {
+                val = readl(dev->regs + ACTMON_DEV_CTRL) |
+                        ACTMON_DEV_CTRL_CONSECUTIVE_ABOVE_WMARK_EN |
+                        ACTMON_DEV_CTRL_CONSECUTIVE_BELOW_WMARK_EN;
+
+                /*
+                 * new_boost = min(old_boost * up_coef + step, max_freq)
+                 */
+                dev->boost_freq = do_percent(dev->boost_freq,
+                                             dev->config->boost_up_coeff);
+                dev->boost_freq += ACTMON_BOOST_FREQ_STEP;
+                if (dev->boost_freq >= tegra->max_freq) {
+                        dev->boost_freq = tegra->max_freq;
+                        val &= ~ACTMON_DEV_CTRL_CONSECUTIVE_ABOVE_WMARK_EN;
+                }
+                writel(val, dev->regs + ACTMON_DEV_CTRL);
+        } else if (val & ACTMON_DEV_INTR_CONSECUTIVE_LOWER) {
+                val = readl(dev->regs + ACTMON_DEV_CTRL) |
+                        ACTMON_DEV_CTRL_CONSECUTIVE_ABOVE_WMARK_EN |
+                        ACTMON_DEV_CTRL_CONSECUTIVE_BELOW_WMARK_EN;
+
+                /*
+                 * new_boost = old_boost * down_coef
+                 * or 0 if (old_boost * down_coef < step / 2)
+                 */
+                dev->boost_freq = do_percent(dev->boost_freq,
+                                             dev->config->boost_down_coeff);
+                if (dev->boost_freq < (ACTMON_BOOST_FREQ_STEP >> 1)) {
+                        dev->boost_freq = 0;
+                        val &= ~ACTMON_DEV_CTRL_CONSECUTIVE_BELOW_WMARK_EN;
+                }
+                writel(val, dev->regs + ACTMON_DEV_CTRL);
+        }
+
+        if (dev->config->avg_dependency_threshold) {
+                val = readl(dev->regs + ACTMON_DEV_CTRL);
+                if (dev->avg_count >= dev->config->avg_dependency_threshold)
+                        val |= ACTMON_DEV_CTRL_CONSECUTIVE_BELOW_WMARK_EN;
+                else if (dev->boost_freq == 0)
+                        val &= ~ACTMON_DEV_CTRL_CONSECUTIVE_BELOW_WMARK_EN;
+                writel(val, dev->regs + ACTMON_DEV_CTRL);
+        }
+
+        writel(ACTMON_INTR_STATUS_CLEAR, dev->regs + ACTMON_DEV_INTR_STATUS);
+
+        actmon_write_barrier(tegra);
+
+        spin_unlock_irqrestore(&tegra->lock, flags);
+
+        return IRQ_WAKE_THREAD;
+}
+
+static unsigned long actmon_cpu_to_emc_rate(struct tegra_devfreq *tegra,
+                                            unsigned long cpu_freq)
+{
+        unsigned int i;
+        struct tegra_actmon_emc_ratio *ratio = actmon_emc_ratios;
+
+        for (i = 0; i < ARRAY_SIZE(actmon_emc_ratios); i++, ratio++) {
+                if (cpu_freq >= ratio->cpu_freq) {
+                        if (ratio->emc_freq >= tegra->max_freq)
+                                return tegra->max_freq;
+                        else
+                                return ratio->emc_freq;
+                }
+        }
+
+        return 0;
+}
+
+static void actmon_update_target(struct tegra_devfreq *tegra,
+                                 struct tegra_devfreq_device *dev)
+{
+        unsigned long cpu_freq = 0;
+        unsigned long static_cpu_emc_freq = 0;
+        unsigned int avg_sustain_coef;
+        unsigned long flags;
+
+        if (dev->config->avg_dependency_threshold) {
+                cpu_freq = cpufreq_get(0);
+                static_cpu_emc_freq = actmon_cpu_to_emc_rate(tegra, cpu_freq);
+        }
+
+        spin_lock_irqsave(&tegra->lock, flags);
+
+        dev->target_freq = dev->avg_count / ACTMON_SAMPLING_PERIOD;
+        avg_sustain_coef = 100 * 100 / dev->config->boost_up_threshold;
+        dev->target_freq = do_percent(dev->target_freq, avg_sustain_coef);
+        dev->target_freq += dev->boost_freq;
+
+        if (dev->avg_count >= dev->config->avg_dependency_threshold)
+                dev->target_freq = max(dev->target_freq, static_cpu_emc_freq);
+
+        spin_unlock_irqrestore(&tegra->lock, flags);
+}
+
+static irqreturn_t actmon_thread_isr(int irq, void *data)
+{
+        struct tegra_devfreq *tegra = data;
+
+        mutex_lock(&tegra->devfreq->lock);
+        update_devfreq(tegra->devfreq);
+        mutex_unlock(&tegra->devfreq->lock);
+
+        return IRQ_HANDLED;
+}
+
+static int tegra_actmon_rate_notify_cb(struct notifier_block *nb,
+                                       unsigned long action, void *ptr)
+{
+        struct clk_notifier_data *data = ptr;
+        struct tegra_devfreq *tegra = container_of(nb, struct tegra_devfreq,
+                                                   rate_change_nb);
+        unsigned int i;
+        unsigned long flags;
+
+        spin_lock_irqsave(&tegra->lock, flags);
+
+        switch (action) {
+        case POST_RATE_CHANGE:
+                tegra->cur_freq = data->new_rate / KHZ;
+
+                for (i = 0; i < ARRAY_SIZE(tegra->devices); i++)
+                        tegra_devfreq_update_wmark(tegra, tegra->devices + i);
+
+                actmon_write_barrier(tegra);
+                break;
+        case PRE_RATE_CHANGE:
+                /* fall through */
+        case ABORT_RATE_CHANGE:
+                break;
+        };
+
+        spin_unlock_irqrestore(&tegra->lock, flags);
+
+        return NOTIFY_OK;
+}
+
+static void tegra_actmon_configure_device(struct tegra_devfreq *tegra,
+                                          struct tegra_devfreq_device *dev)
+{
+        u32 val;
+
+        dev->avg_band_freq = tegra->max_freq * ACTMON_DEFAULT_AVG_BAND / KHZ;
+        dev->target_freq = tegra->cur_freq;
+
+        dev->avg_count = tegra->cur_freq * ACTMON_SAMPLING_PERIOD;
+        writel(dev->avg_count, dev->regs + ACTMON_DEV_INIT_AVG);
+
+        tegra_devfreq_update_avg_wmark(dev);
+        tegra_devfreq_update_wmark(tegra, dev);
+
+        writel(ACTMON_COUNT_WEIGHT, dev->regs + ACTMON_DEV_COUNT_WEIGHT);
+        writel(ACTMON_INTR_STATUS_CLEAR, dev->regs + ACTMON_DEV_INTR_STATUS);
+
+        val = 0;
+        val |= ACTMON_DEV_CTRL_ENB_PERIODIC |
+               ACTMON_DEV_CTRL_AVG_ABOVE_WMARK_EN |
+               ACTMON_DEV_CTRL_AVG_BELOW_WMARK_EN;
+        val |= (ACTMON_AVERAGE_WINDOW_LOG2 - 1)
+                << ACTMON_DEV_CTRL_K_VAL_SHIFT;
+        val |= (ACTMON_BELOW_WMARK_WINDOW - 1)
+                << ACTMON_DEV_CTRL_CONSECUTIVE_BELOW_WMARK_NUM_SHIFT;
+        val |= (ACTMON_ABOVE_WMARK_WINDOW - 1)
+                << ACTMON_DEV_CTRL_CONSECUTIVE_ABOVE_WMARK_NUM_SHIFT;
+        val |= ACTMON_DEV_CTRL_CONSECUTIVE_BELOW_WMARK_EN |
+               ACTMON_DEV_CTRL_CONSECUTIVE_ABOVE_WMARK_EN;
+
+        writel(val, dev->regs + ACTMON_DEV_CTRL);
+
+        actmon_write_barrier(tegra);
+
+        val = readl(dev->regs + ACTMON_DEV_CTRL);
+        val |= ACTMON_DEV_CTRL_ENB;
+        writel(val, dev->regs + ACTMON_DEV_CTRL);
+
+        actmon_write_barrier(tegra);
+}
+
+static int tegra_devfreq_suspend(struct device *dev)
+{
+        struct platform_device *pdev;
+        struct tegra_devfreq *tegra;
+        struct tegra_devfreq_device *actmon_dev;
+        unsigned int i;
+        u32 val;
+
+        pdev = container_of(dev, struct platform_device, dev);
+        tegra = platform_get_drvdata(pdev);
+
+        for (i = 0; i < ARRAY_SIZE(tegra->devices); i++) {
+                actmon_dev = &tegra->devices[i];
+
+                val = readl(actmon_dev->regs + ACTMON_DEV_CTRL);
+                val &= ~ACTMON_DEV_CTRL_ENB;
+                writel(val, actmon_dev->regs + ACTMON_DEV_CTRL);
+
+                writel(ACTMON_INTR_STATUS_CLEAR,
+                       actmon_dev->regs + ACTMON_DEV_INTR_STATUS);
+
+                actmon_write_barrier(tegra);
+        }
+
+        return 0;
+}
+
+static int tegra_devfreq_resume(struct device *dev)
+{
+        struct platform_device *pdev;
+        struct tegra_devfreq *tegra;
+        struct tegra_devfreq_device *actmon_dev;
+        unsigned int i;
+
+        pdev = container_of(dev, struct platform_device, dev);
+        tegra = platform_get_drvdata(pdev);
+
+        for (i = 0; i < ARRAY_SIZE(tegra->devices); i++) {
+                actmon_dev = &tegra->devices[i];
+
+                tegra_actmon_configure_device(tegra, actmon_dev);
+        }
+
+        return 0;
+}
+
+static int tegra_devfreq_target(struct device *dev, unsigned long *freq,
+                                u32 flags)
+{
+        struct platform_device *pdev;
+        struct tegra_devfreq *tegra;
+        struct dev_pm_opp *opp;
+        unsigned long rate = *freq * KHZ;
+
+        pdev = container_of(dev, struct platform_device, dev);
+        tegra = platform_get_drvdata(pdev);
+
+        rcu_read_lock();
+        opp = devfreq_recommended_opp(dev, &rate, flags);
+        if (IS_ERR(opp)) {
+                rcu_read_unlock();
+                dev_err(dev, "Failed to find opp for %lu KHz\n", *freq);
+                return PTR_ERR(opp);
+        }
+        rate = dev_pm_opp_get_freq(opp);
+        rcu_read_unlock();
+
+        /* TODO: Once we have per-user clk constraints, set a floor */
+        clk_set_rate(tegra->emc_clock, rate);
+
+        /* TODO: Set voltage as well */
+
+        return 0;
+}
+
+static int tegra_devfreq_get_dev_status(struct device *dev,
+                                        struct devfreq_dev_status *stat)
+{
+        struct platform_device *pdev;
+        struct tegra_devfreq *tegra;
+        struct tegra_devfreq_device *actmon_dev;
+
+        pdev = container_of(dev, struct platform_device, dev);
+        tegra = platform_get_drvdata(pdev);
+
+        stat->current_frequency = tegra->cur_freq;
+
+        /* To be used by the tegra governor */
+        stat->private_data = tegra;
+
+        /* The below are to be used by the other governors */
+
+        actmon_dev = &tegra->devices[MCALL];
+
+        /* Number of cycles spent on memory access */
+        stat->busy_time = actmon_dev->avg_count;
+
+        /* The bus can be considered to be saturated way before 100% */
+        stat->busy_time *= 100 / BUS_SATURATION_RATIO;
+
+        /* Number of cycles in a sampling period */
+        stat->total_time = ACTMON_SAMPLING_PERIOD * tegra->cur_freq;
+
+        return 0;
+}
+
+static int tegra_devfreq_get_target(struct devfreq *devfreq,
+                                    unsigned long *freq)
+{
+        struct devfreq_dev_status stat;
+        struct tegra_devfreq *tegra;
+        struct tegra_devfreq_device *dev;
+        unsigned long target_freq = 0;
+        unsigned int i;
+        int err;
+
+        err = devfreq->profile->get_dev_status(devfreq->dev.parent, &stat);
+        if (err)
+                return err;
+
+        tegra = stat.private_data;
+
+        for (i = 0; i < ARRAY_SIZE(tegra->devices); i++) {
+                dev = &tegra->devices[i];
+
+                actmon_update_target(tegra, dev);
+
+                target_freq = max(target_freq, dev->target_freq);
+        }
+
+        *freq = target_freq;
+
+        return 0;
+}
+
+static int tegra_devfreq_event_handler(struct devfreq *devfreq,
+                                       unsigned int event, void *data)
+{
+        return 0;
+}
+
+static struct devfreq_governor tegra_devfreq_governor = {
+        .name = "tegra",
+        .get_target_freq = tegra_devfreq_get_target,
+        .event_handler = tegra_devfreq_event_handler,
+};
+
+static struct devfreq_dev_profile tegra_devfreq_profile = {
+        .polling_ms     = 0,
+        .target         = tegra_devfreq_target,
+        .get_dev_status = tegra_devfreq_get_dev_status,
+};
+
+static int tegra_devfreq_probe(struct platform_device *pdev)
+{
+        struct tegra_devfreq *tegra;
+        struct tegra_devfreq_device *dev;
+        struct resource *res;
+        unsigned long max_freq;
+        unsigned int i;
+        int irq;
+        int err;
+
+        tegra = devm_kzalloc(&pdev->dev, sizeof(*tegra), GFP_KERNEL);
+        if (!tegra)
+                return -ENOMEM;
+
+        spin_lock_init(&tegra->lock);
+
+        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        if (!res) {
+                dev_err(&pdev->dev, "Failed to get regs resource\n");
+                return -ENODEV;
+        }
+
+        tegra->regs = devm_ioremap_resource(&pdev->dev, res);
+        if (IS_ERR(tegra->regs)) {
+                dev_err(&pdev->dev, "Failed to get IO memory\n");
+                return PTR_ERR(tegra->regs);
+        }
+
+        tegra->reset = devm_reset_control_get(&pdev->dev, "actmon");
+        if (IS_ERR(tegra->reset)) {
+                dev_err(&pdev->dev, "Failed to get reset\n");
+                return PTR_ERR(tegra->reset);
+        }
+
+        tegra->clock = devm_clk_get(&pdev->dev, "actmon");
+        if (IS_ERR(tegra->clock)) {
+                dev_err(&pdev->dev, "Failed to get actmon clock\n");
+                return PTR_ERR(tegra->clock);
+        }
+
+        tegra->emc_clock = devm_clk_get(&pdev->dev, "emc");
+        if (IS_ERR(tegra->emc_clock)) {
+                dev_err(&pdev->dev, "Failed to get emc clock\n");
+                return PTR_ERR(tegra->emc_clock);
+        }
+
+        err = of_init_opp_table(&pdev->dev);
+        if (err) {
+                dev_err(&pdev->dev, "Failed to init operating point table\n");
+                return err;
+        }
+
+        tegra->rate_change_nb.notifier_call = tegra_actmon_rate_notify_cb;
+        err = clk_notifier_register(tegra->emc_clock, &tegra->rate_change_nb);
+        if (err) {
+                dev_err(&pdev->dev,
+                        "Failed to register rate change notifier\n");
+                return err;
+        }
+
+        reset_control_assert(tegra->reset);
+
+        err = clk_prepare_enable(tegra->clock);
+        if (err) {
+                reset_control_deassert(tegra->reset);
+                return err;
+        }
+
+        reset_control_deassert(tegra->reset);
+
+        max_freq = clk_round_rate(tegra->emc_clock, ULONG_MAX);
+        tegra->max_freq = max_freq / KHZ;
+
+        clk_set_rate(tegra->emc_clock, max_freq);
+
+        tegra->cur_freq = clk_get_rate(tegra->emc_clock) / KHZ;
+
+        writel(ACTMON_SAMPLING_PERIOD - 1,
+               tegra->regs + ACTMON_GLB_PERIOD_CTRL);
+
+        for (i = 0; i < ARRAY_SIZE(actmon_device_configs); i++) {
+                dev = tegra->devices + i;
+                dev->config = actmon_device_configs + i;
+                dev->regs = tegra->regs + dev->config->offset;
+
+                tegra_actmon_configure_device(tegra, tegra->devices + i);
+        }
+
+        err = devfreq_add_governor(&tegra_devfreq_governor);
+        if (err) {
+                dev_err(&pdev->dev, "Failed to add governor\n");
+                return err;
+        }
+
+        tegra_devfreq_profile.initial_freq = clk_get_rate(tegra->emc_clock);
+        tegra->devfreq = devm_devfreq_add_device(&pdev->dev,
+                                                 &tegra_devfreq_profile,
+                                                 "tegra",
+                                                 NULL);
+
+        irq = platform_get_irq(pdev, 0);
+        err = devm_request_threaded_irq(&pdev->dev, irq, actmon_isr,
+                                        actmon_thread_isr, IRQF_SHARED,
+                                        "tegra-devfreq", tegra);
+        if (err) {
+                dev_err(&pdev->dev, "Interrupt request failed\n");
+                return err;
+        }
+
+        platform_set_drvdata(pdev, tegra);
+
+        return 0;
+}
+
+static int tegra_devfreq_remove(struct platform_device *pdev)
+{
+        struct tegra_devfreq *tegra = platform_get_drvdata(pdev);
+
+        clk_notifier_unregister(tegra->emc_clock, &tegra->rate_change_nb);
+
+        clk_disable_unprepare(tegra->clock);
+
+        return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(tegra_devfreq_pm_ops,
+                         tegra_devfreq_suspend,
+                         tegra_devfreq_resume);
+
+static struct of_device_id tegra_devfreq_of_match[] = {
+        { .compatible = "nvidia,tegra124-actmon" },
+        { },
+};
+
+static struct platform_driver tegra_devfreq_driver = {
+        .probe  = tegra_devfreq_probe,
+        .remove = tegra_devfreq_remove,
+        .driver = {
+                .name           = "tegra-devfreq",
+                .owner          = THIS_MODULE,
+                .of_match_table = tegra_devfreq_of_match,
+                .pm             = &tegra_devfreq_pm_ops,
+        },
+};
+module_platform_driver(tegra_devfreq_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Tegra devfreq driver");
+MODULE_AUTHOR("Tomeu Vizoso <tomeu.vizoso@collabora.com>");
+MODULE_DEVICE_TABLE(of, tegra_devfreq_of_match);
diff --git a/drivers/dma/acpi-dma.c b/drivers/dma/acpi-dma.c
index de361a156b34..5a635646e05c 100644
--- a/drivers/dma/acpi-dma.c
+++ b/drivers/dma/acpi-dma.c
@@ -43,7 +43,7 @@ static int acpi_dma_parse_resource_group(const struct acpi_csrt_group *grp,
 {
         const struct acpi_csrt_shared_info *si;
         struct list_head resource_list;
-        struct resource_list_entry *rentry;
+        struct resource_entry *rentry;
         resource_size_t mem = 0, irq = 0;
         int ret;
 
@@ -56,10 +56,10 @@ static int acpi_dma_parse_resource_group(const struct acpi_csrt_group *grp,
                 return 0;
 
         list_for_each_entry(rentry, &resource_list, node) {
-                if (resource_type(&rentry->res) == IORESOURCE_MEM)
-                        mem = rentry->res.start;
-                else if (resource_type(&rentry->res) == IORESOURCE_IRQ)
-                        irq = rentry->res.start;
+                if (resource_type(rentry->res) == IORESOURCE_MEM)
+                        mem = rentry->res->start;
+                else if (resource_type(rentry->res) == IORESOURCE_IRQ)
+                        irq = rentry->res->start;
         }
 
         acpi_dev_free_resource_list(&resource_list);
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index 4d6b26979fbd..bb3725b672cf 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -861,8 +861,8 @@ static acpi_status vmbus_walk_resources(struct acpi_resource *res, void *ctx)
                 break;
 
         case ACPI_RESOURCE_TYPE_ADDRESS64:
-                hyperv_mmio.start = res->data.address64.minimum;
-                hyperv_mmio.end = res->data.address64.maximum;
+                hyperv_mmio.start = res->data.address64.address.minimum;
+                hyperv_mmio.end = res->data.address64.address.maximum;
                 break;
         }
 
diff --git a/drivers/mailbox/pcc.c b/drivers/mailbox/pcc.c
index 6dbf6fcbdfaf..e8902f8dddfc 100644
--- a/drivers/mailbox/pcc.c
+++ b/drivers/mailbox/pcc.c
@@ -386,7 +386,7 @@ static int __init pcc_init(void)
         ret = acpi_pcc_probe();
 
         if (ret) {
-                pr_err("ACPI PCC probe failed.\n");
+                pr_debug("ACPI PCC probe failed.\n");
                 return -ENODEV;
         }
 
@@ -394,7 +394,7 @@ static int __init pcc_init(void)
                         pcc_mbox_probe, NULL, 0, NULL, 0);
 
         if (!pcc_pdev) {
-                pr_err("Err creating PCC platform bundle\n");
+                pr_debug("Err creating PCC platform bundle\n");
                 return -ENODEV;
         }
 
diff --git a/drivers/of/of_pci.c b/drivers/of/of_pci.c
index 60dc36c865b5..110fece2ff53 100644
--- a/drivers/of/of_pci.c
+++ b/drivers/of/of_pci.c
@@ -140,7 +140,7 @@ int of_pci_get_host_bridge_resources(struct device_node *dev,
                         unsigned char busno, unsigned char bus_max,
                         struct list_head *resources, resource_size_t *io_base)
 {
-        struct pci_host_bridge_window *window;
+        struct resource_entry *window;
         struct resource *res;
         struct resource *bus_range;
         struct of_pci_range range;
@@ -226,7 +226,7 @@ int of_pci_get_host_bridge_resources(struct device_node *dev,
 conversion_failed:
         kfree(res);
 parse_failed:
-        list_for_each_entry(window, resources, list)
+        resource_list_for_each_entry(window, resources)
                 kfree(window->res);
         pci_free_resource_list(resources);
         kfree(bus_range);
diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c
index 8fb16188cd82..90fa3a78fb7c 100644
--- a/drivers/pci/bus.c
+++ b/drivers/pci/bus.c
@@ -20,17 +20,16 @@
 void pci_add_resource_offset(struct list_head *resources, struct resource *res,
                              resource_size_t offset)
 {
-        struct pci_host_bridge_window *window;
+        struct resource_entry *entry;
 
-        window = kzalloc(sizeof(struct pci_host_bridge_window), GFP_KERNEL);
-        if (!window) {
+        entry = resource_list_create_entry(res, 0);
+        if (!entry) {
                 printk(KERN_ERR "PCI: can't add host bridge window %pR\n", res);
                 return;
         }
 
-        window->res = res;
-        window->offset = offset;
-        list_add_tail(&window->list, resources);
+        entry->offset = offset;
+        resource_list_add_tail(entry, resources);
 }
 EXPORT_SYMBOL(pci_add_resource_offset);
 
@@ -42,12 +41,7 @@ EXPORT_SYMBOL(pci_add_resource);
 
 void pci_free_resource_list(struct list_head *resources)
 {
-        struct pci_host_bridge_window *window, *tmp;
-
-        list_for_each_entry_safe(window, tmp, resources, list) {
-                list_del(&window->list);
-                kfree(window);
-        }
+        resource_list_free(resources);
 }
 EXPORT_SYMBOL(pci_free_resource_list);
 
diff --git a/drivers/pci/host-bridge.c b/drivers/pci/host-bridge.c
index 0e5f3c95af5b..39b2dbe585aa 100644
--- a/drivers/pci/host-bridge.c
+++ b/drivers/pci/host-bridge.c
@@ -35,10 +35,10 @@ void pcibios_resource_to_bus(struct pci_bus *bus, struct pci_bus_region *region,
                              struct resource *res)
 {
         struct pci_host_bridge *bridge = find_pci_host_bridge(bus);
-        struct pci_host_bridge_window *window;
+        struct resource_entry *window;
         resource_size_t offset = 0;
 
-        list_for_each_entry(window, &bridge->windows, list) {
+        resource_list_for_each_entry(window, &bridge->windows) {
                 if (resource_contains(window->res, res)) {
                         offset = window->offset;
                         break;
@@ -60,10 +60,10 @@ void pcibios_bus_to_resource(struct pci_bus *bus, struct resource *res,
                              struct pci_bus_region *region)
 {
         struct pci_host_bridge *bridge = find_pci_host_bridge(bus);
-        struct pci_host_bridge_window *window;
+        struct resource_entry *window;
         resource_size_t offset = 0;
 
-        list_for_each_entry(window, &bridge->windows, list) {
+        resource_list_for_each_entry(window, &bridge->windows) {
                 struct pci_bus_region bus_region;
 
                 if (resource_type(res) != resource_type(window->res))
diff --git a/drivers/pci/host/pci-host-generic.c b/drivers/pci/host/pci-host-generic.c
index 925e29e3d4c8..ba46e581db99 100644
--- a/drivers/pci/host/pci-host-generic.c
+++ b/drivers/pci/host/pci-host-generic.c
@@ -103,14 +103,14 @@ static int gen_pci_parse_request_of_pci_ranges(struct gen_pci *pci)
         struct device *dev = pci->host.dev.parent;
         struct device_node *np = dev->of_node;
         resource_size_t iobase;
-        struct pci_host_bridge_window *win;
+        struct resource_entry *win;
 
         err = of_pci_get_host_bridge_resources(np, 0, 0xff, &pci->resources,
                                                &iobase);
         if (err)
                 return err;
 
-        list_for_each_entry(win, &pci->resources, list) {
+        resource_list_for_each_entry(win, &pci->resources) {
                 struct resource *parent, *res = win->res;
 
                 switch (resource_type(res)) {
diff --git a/drivers/pci/host/pci-versatile.c b/drivers/pci/host/pci-versatile.c
index 341529ca23e8..1ec694a52379 100644
--- a/drivers/pci/host/pci-versatile.c
+++ b/drivers/pci/host/pci-versatile.c
@@ -74,13 +74,13 @@ static int versatile_pci_parse_request_of_pci_ranges(struct device *dev,
         int err, mem = 1, res_valid = 0;
         struct device_node *np = dev->of_node;
         resource_size_t iobase;
-        struct pci_host_bridge_window *win;
+        struct resource_entry *win;
 
         err = of_pci_get_host_bridge_resources(np, 0, 0xff, res, &iobase);
         if (err)
                 return err;
 
-        list_for_each_entry(win, res, list) {
+        resource_list_for_each_entry(win, res, list) {
                 struct resource *parent, *res = win->res;
 
                 switch (resource_type(res)) {
diff --git a/drivers/pci/host/pci-xgene.c b/drivers/pci/host/pci-xgene.c
index e77d831dc241..aab55474dd0d 100644
--- a/drivers/pci/host/pci-xgene.c
+++ b/drivers/pci/host/pci-xgene.c
@@ -269,11 +269,11 @@ static int xgene_pcie_map_ranges(struct xgene_pcie_port *port,
                                  struct list_head *res,
                                  resource_size_t io_base)
 {
-        struct pci_host_bridge_window *window;
+        struct resource_entry *window;
         struct device *dev = port->dev;
         int ret;
 
-        list_for_each_entry(window, res, list) {
+        resource_list_for_each_entry(window, res) {
                 struct resource *res = window->res;
                 u64 restype = resource_type(res);
 
diff --git a/drivers/pci/host/pcie-xilinx.c b/drivers/pci/host/pcie-xilinx.c
index eac4a4b957ca..f1a06a091ccb 100644
--- a/drivers/pci/host/pcie-xilinx.c
+++ b/drivers/pci/host/pcie-xilinx.c
@@ -667,7 +667,7 @@ static int xilinx_pcie_parse_and_add_res(struct xilinx_pcie_port *port)
         resource_size_t offset;
         struct of_pci_range_parser parser;
         struct of_pci_range range;
-        struct pci_host_bridge_window *win;
+        struct resource_entry *win;
         int err = 0, mem_resno = 0;
 
         /* Get the ranges */
@@ -737,7 +737,7 @@ static int xilinx_pcie_parse_and_add_res(struct xilinx_pcie_port *port)
 
 free_resources:
         release_child_resources(&iomem_resource);
-        list_for_each_entry(win, &port->resources, list)
+        resource_list_for_each_entry(win, &port->resources)
                 devm_kfree(dev, win->res);
         pci_free_resource_list(&port->resources);
 
diff --git a/drivers/pci/hotplug/sgi_hotplug.c b/drivers/pci/hotplug/sgi_hotplug.c
index bada20999870..c32fb786d48e 100644
--- a/drivers/pci/hotplug/sgi_hotplug.c
+++ b/drivers/pci/hotplug/sgi_hotplug.c
@@ -475,7 +475,7 @@ static int disable_slot(struct hotplug_slot *bss_hotplug_slot)
         struct slot *slot = bss_hotplug_slot->private;
         struct pci_dev *dev, *temp;
         int rc;
-        acpi_owner_id ssdt_id = 0;
+        acpi_handle ssdt_hdl = NULL;
 
         /* Acquire update access to the bus */
         mutex_lock(&sn_hotplug_mutex);
@@ -522,7 +522,7 @@ static int disable_slot(struct hotplug_slot *bss_hotplug_slot)
                         if (ACPI_SUCCESS(ret) &&
                             (adr>>16) == (slot->device_num + 1)) {
                                 /* retain the owner id */
-                                acpi_get_id(chandle, &ssdt_id);
+                                ssdt_hdl = chandle;
 
                                 ret = acpi_bus_get_device(chandle,
                                                           &device);
@@ -547,12 +547,13 @@ static int disable_slot(struct hotplug_slot *bss_hotplug_slot)
         pci_unlock_rescan_remove();
 
         /* Remove the SSDT for the slot from the ACPI namespace */
-        if (SN_ACPI_BASE_SUPPORT() && ssdt_id) {
+        if (SN_ACPI_BASE_SUPPORT() && ssdt_hdl) {
                 acpi_status ret;
-                ret = acpi_unload_table_id(ssdt_id);
+                ret = acpi_unload_parent_table(ssdt_hdl);
                 if (ACPI_FAILURE(ret)) {
-                        printk(KERN_ERR "%s: acpi_unload_table_id failed (0x%x) for id %d\n",
-                               __func__, ret, ssdt_id);
+                        acpi_handle_err(ssdt_hdl,
+                                        "%s: acpi_unload_parent_table failed (0x%x)\n",
+                                        __func__, ret);
                         /* try to continue on */
                 }
         }
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
index 3542150fc8a3..489063987325 100644
--- a/drivers/pci/pci-acpi.c
+++ b/drivers/pci/pci-acpi.c
@@ -501,12 +501,29 @@ static int acpi_pci_run_wake(struct pci_dev *dev, bool enable)
         return 0;
 }
 
+static bool acpi_pci_need_resume(struct pci_dev *dev)
+{
+        struct acpi_device *adev = ACPI_COMPANION(&dev->dev);
+
+        if (!adev || !acpi_device_power_manageable(adev))
+                return false;
+
+        if (device_may_wakeup(&dev->dev) != !!adev->wakeup.prepare_count)
+                return true;
+
+        if (acpi_target_system_state() == ACPI_STATE_S0)
+                return false;
+
+        return !!adev->power.flags.dsw_present;
+}
+
 static struct pci_platform_pm_ops acpi_pci_platform_pm = {
         .is_manageable = acpi_pci_power_manageable,
         .set_state = acpi_pci_set_power_state,
         .choose_state = acpi_pci_choose_state,
         .sleep_wake = acpi_pci_sleep_wake,
         .run_wake = acpi_pci_run_wake,
+        .need_resume = acpi_pci_need_resume,
 };
 
 void acpi_pci_add_bus(struct pci_bus *bus)
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 09a66bad8018..3cb2210de553 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -653,7 +653,6 @@ static bool pci_has_legacy_pm_support(struct pci_dev *pci_dev)
 static int pci_pm_prepare(struct device *dev)
 {
         struct device_driver *drv = dev->driver;
-        int error = 0;
 
         /*
          * Devices having power.ignore_children set may still be necessary for
@@ -662,10 +661,12 @@ static int pci_pm_prepare(struct device *dev)
         if (dev->power.ignore_children)
                 pm_runtime_resume(dev);
 
-        if (drv && drv->pm && drv->pm->prepare)
-                error = drv->pm->prepare(dev);
-
-        return error;
+        if (drv && drv->pm && drv->pm->prepare) {
+                int error = drv->pm->prepare(dev);
+                if (error)
+                        return error;
+        }
+        return pci_dev_keep_suspended(to_pci_dev(dev));
 }
 
 
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 460d046ab6fe..81f06e8dcc04 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -523,6 +523,11 @@ static inline int platform_pci_run_wake(struct pci_dev *dev, bool enable)
                         pci_platform_pm->run_wake(dev, enable) : -ENODEV;
 }
 
+static inline bool platform_pci_need_resume(struct pci_dev *dev)
+{
+        return pci_platform_pm ? pci_platform_pm->need_resume(dev) : false;
+}
+
 /**
  * pci_raw_set_power_state - Use PCI PM registers to set the power state of
  *                           given PCI device
@@ -2001,6 +2006,27 @@ bool pci_dev_run_wake(struct pci_dev *dev)
 }
 EXPORT_SYMBOL_GPL(pci_dev_run_wake);
 
+/**
+ * pci_dev_keep_suspended - Check if the device can stay in the suspended state.
+ * @pci_dev: Device to check.
+ *
+ * Return 'true' if the device is runtime-suspended, it doesn't have to be
+ * reconfigured due to wakeup settings difference between system and runtime
+ * suspend and the current power state of it is suitable for the upcoming
+ * (system) transition.
+ */
+bool pci_dev_keep_suspended(struct pci_dev *pci_dev)
+{
+        struct device *dev = &pci_dev->dev;
+
+        if (!pm_runtime_suspended(dev)
+            || (device_can_wakeup(dev) && !device_may_wakeup(dev))
+            || platform_pci_need_resume(pci_dev))
+                return false;
+
+        return pci_target_state(pci_dev) == pci_dev->current_state;
+}
+
 void pci_config_pm_runtime_get(struct pci_dev *pdev)
 {
         struct device *dev = &pdev->dev;
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index d54632a1db43..4091f82239cd 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -50,6 +50,10 @@ int pci_probe_reset_function(struct pci_dev *dev);
  *              for given device (the device's wake-up capability has to be
  *              enabled by @sleep_wake for this feature to work)
  *
+ * @need_resume: returns 'true' if the given device (which is currently
+ *              suspended) needs to be resumed to be configured for system
+ *              wakeup.
+ *
  * If given platform is generally capable of power managing PCI devices, all of
  * these callbacks are mandatory.
  */
@@ -59,6 +63,7 @@ struct pci_platform_pm_ops {
         pci_power_t (*choose_state)(struct pci_dev *dev);
         int (*sleep_wake)(struct pci_dev *dev, bool enable);
         int (*run_wake)(struct pci_dev *dev, bool enable);
+        bool (*need_resume)(struct pci_dev *dev);
 };
 
 int pci_set_platform_pm(struct pci_platform_pm_ops *ops);
@@ -67,6 +72,7 @@ void pci_power_up(struct pci_dev *dev);
 void pci_disable_enabled_device(struct pci_dev *dev);
 int pci_finish_runtime_suspend(struct pci_dev *dev);
 int __pci_pme_wakeup(struct pci_dev *dev, void *ign);
+bool pci_dev_keep_suspended(struct pci_dev *dev);
 void pci_config_pm_runtime_get(struct pci_dev *dev);
 void pci_config_pm_runtime_put(struct pci_dev *dev);
 void pci_pm_init(struct pci_dev *dev);
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 23212f8ae09b..8d2f400e96cb 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1895,7 +1895,7 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
         int error;
         struct pci_host_bridge *bridge;
         struct pci_bus *b, *b2;
-        struct pci_host_bridge_window *window, *n;
+        struct resource_entry *window, *n;
         struct resource *res;
         resource_size_t offset;
         char bus_addr[64];
@@ -1959,8 +1959,8 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
                 printk(KERN_INFO "PCI host bridge to bus %s\n", dev_name(&b->dev));
 
         /* Add initial resources to the bus */
-        list_for_each_entry_safe(window, n, resources, list) {
-                list_move_tail(&window->list, &bridge->windows);
+        resource_list_for_each_entry_safe(window, n, resources) {
+                list_move_tail(&window->node, &bridge->windows);
                 res = window->res;
                 offset = window->offset;
                 if (res->flags & IORESOURCE_BUS)
@@ -2060,12 +2060,12 @@ void pci_bus_release_busn_res(struct pci_bus *b)
 struct pci_bus *pci_scan_root_bus(struct device *parent, int bus,
                 struct pci_ops *ops, void *sysdata, struct list_head *resources)
 {
-        struct pci_host_bridge_window *window;
+        struct resource_entry *window;
         bool found = false;
         struct pci_bus *b;
         int max;
 
-        list_for_each_entry(window, resources, list)
+        resource_list_for_each_entry(window, resources)
                 if (window->res->flags & IORESOURCE_BUS) {
                         found = true;
                         break;
diff --git a/drivers/pnp/pnpacpi/rsparser.c b/drivers/pnp/pnpacpi/rsparser.c
index 66977ebf13b3..ff0356fb378f 100644
--- a/drivers/pnp/pnpacpi/rsparser.c
+++ b/drivers/pnp/pnpacpi/rsparser.c
@@ -180,20 +180,21 @@ static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res,
         struct pnp_dev *dev = data;
         struct acpi_resource_dma *dma;
         struct acpi_resource_vendor_typed *vendor_typed;
-        struct resource r = {0};
+        struct resource_win win = {{0}, 0};
+        struct resource *r = &win.res;
         int i, flags;
 
-        if (acpi_dev_resource_address_space(res, &r)
-            || acpi_dev_resource_ext_address_space(res, &r)) {
-                pnp_add_resource(dev, &r);
+        if (acpi_dev_resource_address_space(res, &win)
+            || acpi_dev_resource_ext_address_space(res, &win)) {
+                pnp_add_resource(dev, &win.res);
                 return AE_OK;
         }
 
-        r.flags = 0;
-        if (acpi_dev_resource_interrupt(res, 0, &r)) {
-                pnpacpi_add_irqresource(dev, &r);
-                for (i = 1; acpi_dev_resource_interrupt(res, i, &r); i++)
-                        pnpacpi_add_irqresource(dev, &r);
+        r->flags = 0;
+        if (acpi_dev_resource_interrupt(res, 0, r)) {
+                pnpacpi_add_irqresource(dev, r);
+                for (i = 1; acpi_dev_resource_interrupt(res, i, r); i++)
+                        pnpacpi_add_irqresource(dev, r);
 
                 if (i > 1) {
                         /*
@@ -209,7 +210,7 @@ static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res,
                         }
                 }
                 return AE_OK;
-        } else if (r.flags & IORESOURCE_DISABLED) {
+        } else if (r->flags & IORESOURCE_DISABLED) {
                 pnp_add_irq_resource(dev, 0, IORESOURCE_DISABLED);
                 return AE_OK;
         }
@@ -218,13 +219,13 @@ static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res,
         case ACPI_RESOURCE_TYPE_MEMORY24:
         case ACPI_RESOURCE_TYPE_MEMORY32:
         case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
-                if (acpi_dev_resource_memory(res, &r))
-                        pnp_add_resource(dev, &r);
+                if (acpi_dev_resource_memory(res, r))
+                        pnp_add_resource(dev, r);
                 break;
         case ACPI_RESOURCE_TYPE_IO:
         case ACPI_RESOURCE_TYPE_FIXED_IO:
-                if (acpi_dev_resource_io(res, &r))
-                        pnp_add_resource(dev, &r);
+                if (acpi_dev_resource_io(res, r))
+                        pnp_add_resource(dev, r);
                 break;
         case ACPI_RESOURCE_TYPE_DMA:
                 dma = &res->data.dma;
@@ -410,12 +411,12 @@ static __init void pnpacpi_parse_address_option(struct pnp_dev *dev,
         if (p->resource_type == ACPI_MEMORY_RANGE) {
                 if (p->info.mem.write_protect == ACPI_READ_WRITE_MEMORY)
                         flags = IORESOURCE_MEM_WRITEABLE;
-                pnp_register_mem_resource(dev, option_flags, p->minimum,
-                                          p->minimum, 0, p->address_length,
+                pnp_register_mem_resource(dev, option_flags, p->address.minimum,
+                                          p->address.minimum, 0, p->address.address_length,
                                           flags);
         } else if (p->resource_type == ACPI_IO_RANGE)
-                pnp_register_port_resource(dev, option_flags, p->minimum,
-                                           p->minimum, 0, p->address_length,
+                pnp_register_port_resource(dev, option_flags, p->address.minimum,
+                                           p->address.minimum, 0, p->address.address_length,
                                            IORESOURCE_IO_FIXED);
 }
 
@@ -429,12 +430,12 @@ static __init void pnpacpi_parse_ext_address_option(struct pnp_dev *dev,
         if (p->resource_type == ACPI_MEMORY_RANGE) {
                 if (p->info.mem.write_protect == ACPI_READ_WRITE_MEMORY)
                         flags = IORESOURCE_MEM_WRITEABLE;
-                pnp_register_mem_resource(dev, option_flags, p->minimum,
-                                          p->minimum, 0, p->address_length,
+                pnp_register_mem_resource(dev, option_flags, p->address.minimum,
+                                          p->address.minimum, 0, p->address.address_length,
                                           flags);
         } else if (p->resource_type == ACPI_IO_RANGE)
-                pnp_register_port_resource(dev, option_flags, p->minimum,
-                                           p->minimum, 0, p->address_length,
+                pnp_register_port_resource(dev, option_flags, p->address.minimum,
+                                           p->address.minimum, 0, p->address.address_length,
                                            IORESOURCE_IO_FIXED);
 }
 
diff --git a/drivers/sfi/sfi_core.c b/drivers/sfi/sfi_core.c
index 1e824fb1649b..296db7a69c27 100644
--- a/drivers/sfi/sfi_core.c
+++ b/drivers/sfi/sfi_core.c
@@ -161,7 +161,7 @@ static int sfi_verify_table(struct sfi_table_header *table)
  * Check for common case that we can re-use mapping to SYST,
  * which requires syst_pa, syst_va to be initialized.
  */
-struct sfi_table_header *sfi_map_table(u64 pa)
+static struct sfi_table_header *sfi_map_table(u64 pa)
 {
         struct sfi_table_header *th;
         u32 length;
@@ -189,7 +189,7 @@ struct sfi_table_header *sfi_map_table(u64 pa)
  * Undoes effect of sfi_map_table() by unmapping table
  * if it did not completely fit on same page as SYST.
  */
-void sfi_unmap_table(struct sfi_table_header *th)
+static void sfi_unmap_table(struct sfi_table_header *th)
 {
         if (!TABLE_ON_PAGE(syst_va, th, th->len))
                 sfi_unmap_memory(th, TABLE_ON_PAGE(th, th, th->len) ?
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index aeb50bb6ba9c..eaffb0248de1 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -3452,8 +3452,6 @@ int usb_port_resume(struct usb_device *udev, pm_message_t msg)
         return status;
 }
 
-#ifdef  CONFIG_PM
-
 int usb_remote_wakeup(struct usb_device *udev)
 {
         int     status = 0;
@@ -3512,16 +3510,6 @@ static int hub_handle_remote_wakeup(struct usb_hub *hub, unsigned int port,
         return connect_change;
 }
 
-#else
-
-static int hub_handle_remote_wakeup(struct usb_hub *hub, unsigned int port,
-                u16 portstatus, u16 portchange)
-{
-        return 0;
-}
-
-#endif
-
 static int check_ports_changed(struct usb_hub *hub)
 {
         int port1;
diff --git a/drivers/xen/xen-acpi-memhotplug.c b/drivers/xen/xen-acpi-memhotplug.c
index 34e40b733f9a..4fc886cd5586 100644
--- a/drivers/xen/xen-acpi-memhotplug.c
+++ b/drivers/xen/xen-acpi-memhotplug.c
@@ -117,8 +117,8 @@ acpi_memory_get_resource(struct acpi_resource *resource, void *context)
         list_for_each_entry(info, &mem_device->res_list, list) {
                 if ((info->caching == address64.info.mem.caching) &&
                     (info->write_protect == address64.info.mem.write_protect) &&
-                    (info->start_addr + info->length == address64.minimum)) {
-                        info->length += address64.address_length;
+                    (info->start_addr + info->length == address64.address.minimum)) {
+                        info->length += address64.address.address_length;
                         return AE_OK;
                 }
         }
@@ -130,8 +130,8 @@ acpi_memory_get_resource(struct acpi_resource *resource, void *context)
         INIT_LIST_HEAD(&new->list);
         new->caching = address64.info.mem.caching;
         new->write_protect = address64.info.mem.write_protect;
-        new->start_addr = address64.minimum;
-        new->length = address64.address_length;
+        new->start_addr = address64.address.minimum;
+        new->length = address64.address.address_length;
         list_add_tail(&new->list, &mem_device->res_list);
 
         return AE_OK;
diff --git a/include/acpi/acbuffer.h b/include/acpi/acbuffer.h
index d5ec6c87810f..6b040f4ddfab 100644
--- a/include/acpi/acbuffer.h
+++ b/include/acpi/acbuffer.h
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/include/acpi/acconfig.h b/include/acpi/acconfig.h
index 5a0a3e5daf85..03aacfb3e98b 100644
--- a/include/acpi/acconfig.h
+++ b/include/acpi/acconfig.h
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/include/acpi/acexcep.h b/include/acpi/acexcep.h
index 8b06e4c1dd5d..11c3a011dcbf 100644
--- a/include/acpi/acexcep.h
+++ b/include/acpi/acexcep.h
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/include/acpi/acnames.h b/include/acpi/acnames.h
index 7461327e14e4..273de709495c 100644
--- a/include/acpi/acnames.h
+++ b/include/acpi/acnames.h
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/include/acpi/acoutput.h b/include/acpi/acoutput.h
index 1baae6edda89..9318a87ee39a 100644
--- a/include/acpi/acoutput.h
+++ b/include/acpi/acoutput.h
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/include/acpi/acpi.h b/include/acpi/acpi.h
index a08e55a263c9..b0bb30ebb807 100644
--- a/include/acpi/acpi.h
+++ b/include/acpi/acpi.h
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/include/acpi/acpiosxf.h b/include/acpi/acpiosxf.h
index 03b3e6d405ff..0bc78df66d4b 100644
--- a/include/acpi/acpiosxf.h
+++ b/include/acpi/acpiosxf.h
@@ -7,7 +7,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/include/acpi/acpixf.h b/include/acpi/acpixf.h
index 5ba78464c1b1..d56f5d722138 100644
--- a/include/acpi/acpixf.h
+++ b/include/acpi/acpixf.h
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -46,7 +46,7 @@
 
 /* Current ACPICA subsystem version in YYYYMMDD format */
 
-#define ACPI_CA_VERSION                 0x20141107
+#define ACPI_CA_VERSION                 0x20150204
 
 #include <acpi/acconfig.h>
 #include <acpi/actypes.h>
@@ -569,6 +569,14 @@ ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
                                                           address,
                                                           void *context))
 ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
+                                 acpi_install_gpe_raw_handler(acpi_handle
+                                                              gpe_device,
+                                                              u32 gpe_number,
+                                                              u32 type,
+                                                              acpi_gpe_handler
+                                                              address,
+                                                              void *context))
+ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
                                  acpi_remove_gpe_handler(acpi_handle gpe_device,
                                                          u32 gpe_number,
                                                          acpi_gpe_handler
@@ -891,12 +899,6 @@ ACPI_APP_DEPENDENT_RETURN_VOID(ACPI_PRINTF_LIKE(1)
 ACPI_GLOBAL(u8, acpi_gbl_permanent_mmap);
 
 ACPI_EXTERNAL_RETURN_STATUS(acpi_status
-                            acpi_get_id(acpi_handle object,
-                                        acpi_owner_id * out_type))
-
-ACPI_EXTERNAL_RETURN_STATUS(acpi_status acpi_unload_table_id(acpi_owner_id id))
-
-ACPI_EXTERNAL_RETURN_STATUS(acpi_status
                             acpi_get_table_with_size(acpi_string signature,
                                                      u32 instance,
                                                      struct acpi_table_header
diff --git a/include/acpi/acrestyp.h b/include/acpi/acrestyp.h
index eb760ca0b2e0..ebe242638591 100644
--- a/include/acpi/acrestyp.h
+++ b/include/acpi/acrestyp.h
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -305,43 +305,51 @@ struct acpi_resource_source {
         u8                                      max_address_fixed; \
         union acpi_resource_attribute           info;
 
-struct acpi_resource_address {
-ACPI_RESOURCE_ADDRESS_COMMON};
-
-struct acpi_resource_address16 {
-        ACPI_RESOURCE_ADDRESS_COMMON u16 granularity;
+struct acpi_address16_attribute {
+        u16 granularity;
         u16 minimum;
         u16 maximum;
         u16 translation_offset;
         u16 address_length;
-        struct acpi_resource_source resource_source;
 };
 
-struct acpi_resource_address32 {
-        ACPI_RESOURCE_ADDRESS_COMMON u32 granularity;
+struct acpi_address32_attribute {
+        u32 granularity;
         u32 minimum;
         u32 maximum;
         u32 translation_offset;
         u32 address_length;
-        struct acpi_resource_source resource_source;
 };
 
-struct acpi_resource_address64 {
-        ACPI_RESOURCE_ADDRESS_COMMON u64 granularity;
+struct acpi_address64_attribute {
+        u64 granularity;
         u64 minimum;
         u64 maximum;
         u64 translation_offset;
         u64 address_length;
+};
+
+struct acpi_resource_address {
+ACPI_RESOURCE_ADDRESS_COMMON};
+
+struct acpi_resource_address16 {
+        ACPI_RESOURCE_ADDRESS_COMMON struct acpi_address16_attribute address;
+        struct acpi_resource_source resource_source;
+};
+
+struct acpi_resource_address32 {
+        ACPI_RESOURCE_ADDRESS_COMMON struct acpi_address32_attribute address;
+        struct acpi_resource_source resource_source;
+};
+
+struct acpi_resource_address64 {
+        ACPI_RESOURCE_ADDRESS_COMMON struct acpi_address64_attribute address;
         struct acpi_resource_source resource_source;
 };
 
 struct acpi_resource_extended_address64 {
         ACPI_RESOURCE_ADDRESS_COMMON u8 revision_ID;
-        u64 granularity;
-        u64 minimum;
-        u64 maximum;
-        u64 translation_offset;
-        u64 address_length;
+        struct acpi_address64_attribute address;
         u64 type_specific;
 };
 
diff --git a/include/acpi/actbl.h b/include/acpi/actbl.h
index bee19d8170c5..d4081fef1095 100644
--- a/include/acpi/actbl.h
+++ b/include/acpi/actbl.h
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/include/acpi/actbl1.h b/include/acpi/actbl1.h
index 29e79370641d..b80b0e6dabc5 100644
--- a/include/acpi/actbl1.h
+++ b/include/acpi/actbl1.h
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/include/acpi/actbl2.h b/include/acpi/actbl2.h
index ecff62405f17..f06d75e5fa54 100644
--- a/include/acpi/actbl2.h
+++ b/include/acpi/actbl2.h
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/include/acpi/actbl3.h b/include/acpi/actbl3.h
index 5480cb2236bf..440ca8104b43 100644
--- a/include/acpi/actbl3.h
+++ b/include/acpi/actbl3.h
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/include/acpi/actypes.h b/include/acpi/actypes.h
index bbef17368e49..b034f1068dfe 100644
--- a/include/acpi/actypes.h
+++ b/include/acpi/actypes.h
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -744,7 +744,7 @@ typedef u32 acpi_event_status;
 /*
  * GPE info flags - Per GPE
  * +-------+-+-+---+
- * |  7:4  |3|2|1:0|
+ * |  7:5  |4|3|2:0|
  * +-------+-+-+---+
  *     |    | |  |
  *     |    | |  +-- Type of dispatch:to method, handler, notify, or none
@@ -756,13 +756,15 @@ typedef u32 acpi_event_status;
 #define ACPI_GPE_DISPATCH_METHOD        (u8) 0x01
 #define ACPI_GPE_DISPATCH_HANDLER       (u8) 0x02
 #define ACPI_GPE_DISPATCH_NOTIFY        (u8) 0x03
-#define ACPI_GPE_DISPATCH_MASK          (u8) 0x03
+#define ACPI_GPE_DISPATCH_RAW_HANDLER   (u8) 0x04
+#define ACPI_GPE_DISPATCH_MASK          (u8) 0x07
+#define ACPI_GPE_DISPATCH_TYPE(flags)   ((u8) ((flags) & ACPI_GPE_DISPATCH_MASK))
 
-#define ACPI_GPE_LEVEL_TRIGGERED        (u8) 0x04
+#define ACPI_GPE_LEVEL_TRIGGERED        (u8) 0x08
 #define ACPI_GPE_EDGE_TRIGGERED         (u8) 0x00
-#define ACPI_GPE_XRUPT_TYPE_MASK        (u8) 0x04
+#define ACPI_GPE_XRUPT_TYPE_MASK        (u8) 0x08
 
-#define ACPI_GPE_CAN_WAKE               (u8) 0x08
+#define ACPI_GPE_CAN_WAKE               (u8) 0x10
 
 /*
  * Flags for GPE and Lock interfaces
diff --git a/include/acpi/platform/acenv.h b/include/acpi/platform/acenv.h
index 5f8cc1fa3278..ad74dc51d5b7 100644
--- a/include/acpi/platform/acenv.h
+++ b/include/acpi/platform/acenv.h
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/include/acpi/platform/acenvex.h b/include/acpi/platform/acenvex.h
index 2b612384c994..71e5ec5b07a3 100644
--- a/include/acpi/platform/acenvex.h
+++ b/include/acpi/platform/acenvex.h
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/include/acpi/platform/acgcc.h b/include/acpi/platform/acgcc.h
index 384875da3713..f54de0a63558 100644
--- a/include/acpi/platform/acgcc.h
+++ b/include/acpi/platform/acgcc.h
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/include/acpi/platform/aclinux.h b/include/acpi/platform/aclinux.h
index 1ba7c190c2cc..74ba46c8157a 100644
--- a/include/acpi/platform/aclinux.h
+++ b/include/acpi/platform/aclinux.h
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/include/acpi/platform/aclinuxex.h b/include/acpi/platform/aclinuxex.h
index 568d4b886712..acedc3f026de 100644
--- a/include/acpi/platform/aclinuxex.h
+++ b/include/acpi/platform/aclinuxex.h
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index d459cd17b477..24c7aa8b1d20 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -27,6 +27,7 @@
 
 #include <linux/errno.h>
 #include <linux/ioport.h>       /* for struct resource */
+#include <linux/resource_ext.h>
 #include <linux/device.h>
 #include <linux/property.h>
 
@@ -151,6 +152,10 @@ int acpi_map_cpu(acpi_handle handle, int physid, int *pcpu);
 int acpi_unmap_cpu(int cpu);
 #endif /* CONFIG_ACPI_HOTPLUG_CPU */
 
+#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
+int acpi_get_ioapic_id(acpi_handle handle, u32 gsi_base, u64 *phys_addr);
+#endif
+
 int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base);
 int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base);
 int acpi_ioapic_registered(acpi_handle handle, u32 gsi_base);
@@ -288,22 +293,25 @@ extern int pnpacpi_disabled;
 bool acpi_dev_resource_memory(struct acpi_resource *ares, struct resource *res);
 bool acpi_dev_resource_io(struct acpi_resource *ares, struct resource *res);
 bool acpi_dev_resource_address_space(struct acpi_resource *ares,
-                                     struct resource *res);
+                                     struct resource_win *win);
 bool acpi_dev_resource_ext_address_space(struct acpi_resource *ares,
-                                         struct resource *res);
+                                         struct resource_win *win);
 unsigned long acpi_dev_irq_flags(u8 triggering, u8 polarity, u8 shareable);
 bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index,
                                  struct resource *res);
 
-struct resource_list_entry {
-        struct list_head node;
-        struct resource res;
-};
-
 void acpi_dev_free_resource_list(struct list_head *list);
 int acpi_dev_get_resources(struct acpi_device *adev, struct list_head *list,
                            int (*preproc)(struct acpi_resource *, void *),
                            void *preproc_data);
+int acpi_dev_filter_resource_type(struct acpi_resource *ares,
+                                  unsigned long types);
+
+static inline int acpi_dev_filter_resource_type_cb(struct acpi_resource *ares,
+                                                   void *arg)
+{
+        return acpi_dev_filter_resource_type(ares, (unsigned long)arg);
+}
 
 int acpi_check_resource_conflict(const struct resource *res);
 
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index 4d078cebafd2..2ee4888c1f47 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -66,8 +66,6 @@ struct cpufreq_policy {
         unsigned int            shared_type; /* ACPI: ANY or ALL affected CPUs
                                                 should set cpufreq */
         unsigned int            cpu;    /* cpu nr of CPU managing this policy */
-        unsigned int            last_cpu; /* cpu nr of previous CPU that managed
-                                           * this policy */
         struct clk              *clk;
         struct cpufreq_cpuinfo  cpuinfo;/* see above */
 
@@ -113,6 +111,9 @@ struct cpufreq_policy {
         wait_queue_head_t       transition_wait;
         struct task_struct      *transition_task; /* Task which is doing the transition */
 
+        /* cpufreq-stats */
+        struct cpufreq_stats    *stats;
+
         /* For cpufreq driver's internal use */
         void                    *driver_data;
 };
@@ -367,9 +368,8 @@ static inline void cpufreq_resume(void) {}
 #define CPUFREQ_INCOMPATIBLE            (1)
 #define CPUFREQ_NOTIFY                  (2)
 #define CPUFREQ_START                   (3)
-#define CPUFREQ_UPDATE_POLICY_CPU       (4)
-#define CPUFREQ_CREATE_POLICY           (5)
-#define CPUFREQ_REMOVE_POLICY           (6)
+#define CPUFREQ_CREATE_POLICY           (4)
+#define CPUFREQ_REMOVE_POLICY           (5)
 
 #ifdef CONFIG_CPU_FREQ
 int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list);
diff --git a/include/linux/devfreq-event.h b/include/linux/devfreq-event.h
new file mode 100644
index 000000000000..602fbbfcfeed
--- /dev/null
+++ b/include/linux/devfreq-event.h
@@ -0,0 +1,196 @@
+/*
+ * devfreq-event: a framework to provide raw data and events of devfreq devices
+ *
+ * Copyright (C) 2014 Samsung Electronics
+ * Author: Chanwoo Choi <cw00.choi@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __LINUX_DEVFREQ_EVENT_H__
+#define __LINUX_DEVFREQ_EVENT_H__
+
+#include <linux/device.h>
+
+/**
+ * struct devfreq_event_dev - the devfreq-event device
+ *
+ * @node        : Contain the devfreq-event device that have been registered.
+ * @dev         : the device registered by devfreq-event class. dev.parent is
+ *                the device using devfreq-event.
+ * @lock        : a mutex to protect accessing devfreq-event.
+ * @enable_count: the number of enable function have been called.
+ * @desc        : the description for devfreq-event device.
+ *
+ * This structure contains devfreq-event device information.
+ */
+struct devfreq_event_dev {
+        struct list_head node;
+
+        struct device dev;
+        struct mutex lock;
+        u32 enable_count;
+
+        const struct devfreq_event_desc *desc;
+};
+
+/**
+ * struct devfreq_event_data - the devfreq-event data
+ *
+ * @load_count  : load count of devfreq-event device for the given period.
+ * @total_count : total count of devfreq-event device for the given period.
+ *                each count may represent a clock cycle, a time unit
+ *                (ns/us/...), or anything the device driver wants.
+ *                Generally, utilization is load_count / total_count.
+ *
+ * This structure contains the data of devfreq-event device for polling period.
+ */
+struct devfreq_event_data {
+        unsigned long load_count;
+        unsigned long total_count;
+};
+
+/**
+ * struct devfreq_event_ops - the operations of devfreq-event device
+ *
+ * @enable      : Enable the devfreq-event device.
+ * @disable     : Disable the devfreq-event device.
+ * @reset       : Reset all setting of the devfreq-event device.
+ * @set_event   : Set the specific event type for the devfreq-event device.
+ * @get_event   : Get the result of the devfreq-event devie with specific
+ *                event type.
+ *
+ * This structure contains devfreq-event device operations which can be
+ * implemented by devfreq-event device drivers.
+ */
+struct devfreq_event_ops {
+        /* Optional functions */
+        int (*enable)(struct devfreq_event_dev *edev);
+        int (*disable)(struct devfreq_event_dev *edev);
+        int (*reset)(struct devfreq_event_dev *edev);
+
+        /* Mandatory functions */
+        int (*set_event)(struct devfreq_event_dev *edev);
+        int (*get_event)(struct devfreq_event_dev *edev,
+                         struct devfreq_event_data *edata);
+};
+
+/**
+ * struct devfreq_event_desc - the descriptor of devfreq-event device
+ *
+ * @name        : the name of devfreq-event device.
+ * @driver_data : the private data for devfreq-event driver.
+ * @ops         : the operation to control devfreq-event device.
+ *
+ * Each devfreq-event device is described with a this structure.
+ * This structure contains the various data for devfreq-event device.
+ */
+struct devfreq_event_desc {
+        const char *name;
+        void *driver_data;
+
+        struct devfreq_event_ops *ops;
+};
+
+#if defined(CONFIG_PM_DEVFREQ_EVENT)
+extern int devfreq_event_enable_edev(struct devfreq_event_dev *edev);
+extern int devfreq_event_disable_edev(struct devfreq_event_dev *edev);
+extern bool devfreq_event_is_enabled(struct devfreq_event_dev *edev);
+extern int devfreq_event_set_event(struct devfreq_event_dev *edev);
+extern int devfreq_event_get_event(struct devfreq_event_dev *edev,
+                                struct devfreq_event_data *edata);
+extern int devfreq_event_reset_event(struct devfreq_event_dev *edev);
+extern struct devfreq_event_dev *devfreq_event_get_edev_by_phandle(
+                                struct device *dev, int index);
+extern int devfreq_event_get_edev_count(struct device *dev);
+extern struct devfreq_event_dev *devfreq_event_add_edev(struct device *dev,
+                                struct devfreq_event_desc *desc);
+extern int devfreq_event_remove_edev(struct devfreq_event_dev *edev);
+extern struct devfreq_event_dev *devm_devfreq_event_add_edev(struct device *dev,
+                                struct devfreq_event_desc *desc);
+extern void devm_devfreq_event_remove_edev(struct device *dev,
+                                struct devfreq_event_dev *edev);
+static inline void *devfreq_event_get_drvdata(struct devfreq_event_dev *edev)
+{
+        return edev->desc->driver_data;
+}
+#else
+static inline int devfreq_event_enable_edev(struct devfreq_event_dev *edev)
+{
+        return -EINVAL;
+}
+
+static inline int devfreq_event_disable_edev(struct devfreq_event_dev *edev)
+{
+        return -EINVAL;
+}
+
+static inline bool devfreq_event_is_enabled(struct devfreq_event_dev *edev)
+{
+        return false;
+}
+
+static inline int devfreq_event_set_event(struct devfreq_event_dev *edev)
+{
+        return -EINVAL;
+}
+
+static inline int devfreq_event_get_event(struct devfreq_event_dev *edev,
+                                        struct devfreq_event_data *edata)
+{
+        return -EINVAL;
+}
+
+static inline int devfreq_event_reset_event(struct devfreq_event_dev *edev)
+{
+        return -EINVAL;
+}
+
+static inline void *devfreq_event_get_drvdata(struct devfreq_event_dev *edev)
+{
+        return ERR_PTR(-EINVAL);
+}
+
+static inline struct devfreq_event_dev *devfreq_event_get_edev_by_phandle(
+                                        struct device *dev, int index)
+{
+        return ERR_PTR(-EINVAL);
+}
+
+static inline int devfreq_event_get_edev_count(struct device *dev)
+{
+        return -EINVAL;
+}
+
+static inline struct devfreq_event_dev *devfreq_event_add_edev(struct device *dev,
+                                        struct devfreq_event_desc *desc)
+{
+        return ERR_PTR(-EINVAL);
+}
+
+static inline int devfreq_event_remove_edev(struct devfreq_event_dev *edev)
+{
+        return -EINVAL;
+}
+
+static inline struct devfreq_event_dev *devm_devfreq_event_add_edev(
+                                        struct device *dev,
+                                        struct devfreq_event_desc *desc)
+{
+        return ERR_PTR(-EINVAL);
+}
+
+static inline void devm_devfreq_event_remove_edev(struct device *dev,
+                                        struct devfreq_event_dev *edev)
+{
+}
+
+static inline void *devfreq_event_get_drvdata(struct devfreq_event_dev *edev)
+{
+        return NULL;
+}
+#endif /* CONFIG_PM_DEVFREQ_EVENT */
+
+#endif /* __LINUX_DEVFREQ_EVENT_H__ */
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 421eb6a9e600..211e9da8a7d7 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -29,6 +29,7 @@
 #include <linux/atomic.h>
 #include <linux/device.h>
 #include <linux/io.h>
+#include <linux/resource_ext.h>
 #include <uapi/linux/pci.h>
 
 #include <linux/pci_ids.h>
@@ -399,16 +400,10 @@ static inline int pci_channel_offline(struct pci_dev *pdev)
         return (pdev->error_state != pci_channel_io_normal);
 }
 
-struct pci_host_bridge_window {
-        struct list_head list;
-        struct resource *res;           /* host bridge aperture (CPU address) */
-        resource_size_t offset;         /* bus address + offset = CPU address */
-};
-
 struct pci_host_bridge {
         struct device dev;
         struct pci_bus *bus;            /* root bus */
-        struct list_head windows;       /* pci_host_bridge_windows */
+        struct list_head windows;       /* resource_entry */
         void (*release_fn)(struct pci_host_bridge *);
         void *release_data;
 };
diff --git a/include/linux/pm.h b/include/linux/pm.h
index 8b5976364619..e2f1be6dd9dd 100644
--- a/include/linux/pm.h
+++ b/include/linux/pm.h
@@ -597,7 +597,7 @@ struct dev_pm_info {
 
 extern void update_pm_runtime_accounting(struct device *dev);
 extern int dev_pm_get_subsys_data(struct device *dev);
-extern int dev_pm_put_subsys_data(struct device *dev);
+extern void dev_pm_put_subsys_data(struct device *dev);
 
 /*
  * Power domains provide callbacks that are executed during system suspend,
diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h
index a9edab2c787a..080e778118ba 100644
--- a/include/linux/pm_domain.h
+++ b/include/linux/pm_domain.h
@@ -113,8 +113,6 @@ struct generic_pm_domain_data {
         struct pm_domain_data base;
         struct gpd_timing_data td;
         struct notifier_block nb;
-        struct mutex lock;
-        unsigned int refcount;
         int need_restore;
 };
 
@@ -140,7 +138,6 @@ extern int __pm_genpd_name_add_device(const char *domain_name,
 
 extern int pm_genpd_remove_device(struct generic_pm_domain *genpd,
                                   struct device *dev);
-extern void pm_genpd_dev_need_restore(struct device *dev, bool val);
 extern int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
                                   struct generic_pm_domain *new_subdomain);
 extern int pm_genpd_add_subdomain_names(const char *master_name,
@@ -187,7 +184,6 @@ static inline int pm_genpd_remove_device(struct generic_pm_domain *genpd,
 {
         return -ENOSYS;
 }
-static inline void pm_genpd_dev_need_restore(struct device *dev, bool val) {}
 static inline int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
                                          struct generic_pm_domain *new_sd)
 {
diff --git a/include/linux/resource_ext.h b/include/linux/resource_ext.h
new file mode 100644
index 000000000000..e2bf63d881d4
--- /dev/null
+++ b/include/linux/resource_ext.h
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2015, Intel Corporation
+ * Author: Jiang Liu <jiang.liu@linux.intel.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ */
+#ifndef _LINUX_RESOURCE_EXT_H
+#define _LINUX_RESOURCE_EXT_H
+#include <linux/types.h>
+#include <linux/list.h>
+#include <linux/ioport.h>
+#include <linux/slab.h>
+
+/* Represent resource window for bridge devices */
+struct resource_win {
+        struct resource res;            /* In master (CPU) address space */
+        resource_size_t offset;         /* Translation offset for bridge */
+};
+
+/*
+ * Common resource list management data structure and interfaces to support
+ * ACPI, PNP and PCI host bridge etc.
+ */
+struct resource_entry {
+        struct list_head        node;
+        struct resource         *res;   /* In master (CPU) address space */
+        resource_size_t         offset; /* Translation offset for bridge */
+        struct resource         __res;  /* Default storage for res */
+};
+
+extern struct resource_entry *
+resource_list_create_entry(struct resource *res, size_t extra_size);
+extern void resource_list_free(struct list_head *head);
+
+static inline void resource_list_add(struct resource_entry *entry,
+                                     struct list_head *head)
+{
+        list_add(&entry->node, head);
+}
+
+static inline void resource_list_add_tail(struct resource_entry *entry,
+                                          struct list_head *head)
+{
+        list_add_tail(&entry->node, head);
+}
+
+static inline void resource_list_del(struct resource_entry *entry)
+{
+        list_del(&entry->node);
+}
+
+static inline void resource_list_free_entry(struct resource_entry *entry)
+{
+        kfree(entry);
+}
+
+static inline void
+resource_list_destroy_entry(struct resource_entry *entry)
+{
+        resource_list_del(entry);
+        resource_list_free_entry(entry);
+}
+
+#define resource_list_for_each_entry(entry, list)       \
+        list_for_each_entry((entry), (list), node)
+
+#define resource_list_for_each_entry_safe(entry, tmp, list)     \
+        list_for_each_entry_safe((entry), (tmp), (list), node)
+
+#endif /* _LINUX_RESOURCE_EXT_H */
diff --git a/kernel/power/qos.c b/kernel/power/qos.c
index 5f4c006c4b1e..97b0df71303e 100644
--- a/kernel/power/qos.c
+++ b/kernel/power/qos.c
@@ -41,6 +41,8 @@
 #include <linux/platform_device.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
 
 #include <linux/uaccess.h>
 #include <linux/export.h>
@@ -182,6 +184,81 @@ static inline void pm_qos_set_value(struct pm_qos_constraints *c, s32 value)
         c->target_value = value;
 }
 
+static inline int pm_qos_get_value(struct pm_qos_constraints *c);
+static int pm_qos_dbg_show_requests(struct seq_file *s, void *unused)
+{
+        struct pm_qos_object *qos = (struct pm_qos_object *)s->private;
+        struct pm_qos_constraints *c;
+        struct pm_qos_request *req;
+        char *type;
+        unsigned long flags;
+        int tot_reqs = 0;
+        int active_reqs = 0;
+
+        if (IS_ERR_OR_NULL(qos)) {
+                pr_err("%s: bad qos param!\n", __func__);
+                return -EINVAL;
+        }
+        c = qos->constraints;
+        if (IS_ERR_OR_NULL(c)) {
+                pr_err("%s: Bad constraints on qos?\n", __func__);
+                return -EINVAL;
+        }
+
+        /* Lock to ensure we have a snapshot */
+        spin_lock_irqsave(&pm_qos_lock, flags);
+        if (plist_head_empty(&c->list)) {
+                seq_puts(s, "Empty!\n");
+                goto out;
+        }
+
+        switch (c->type) {
+        case PM_QOS_MIN:
+                type = "Minimum";
+                break;
+        case PM_QOS_MAX:
+                type = "Maximum";
+                break;
+        case PM_QOS_SUM:
+                type = "Sum";
+                break;
+        default:
+                type = "Unknown";
+        }
+
+        plist_for_each_entry(req, &c->list, node) {
+                char *state = "Default";
+
+                if ((req->node).prio != c->default_value) {
+                        active_reqs++;
+                        state = "Active";
+                }
+                tot_reqs++;
+                seq_printf(s, "%d: %d: %s\n", tot_reqs,
+                           (req->node).prio, state);
+        }
+
+        seq_printf(s, "Type=%s, Value=%d, Requests: active=%d / total=%d\n",
+                   type, pm_qos_get_value(c), active_reqs, tot_reqs);
+
+out:
+        spin_unlock_irqrestore(&pm_qos_lock, flags);
+        return 0;
+}
+
+static int pm_qos_dbg_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, pm_qos_dbg_show_requests,
+                           inode->i_private);
+}
+
+static const struct file_operations pm_qos_debug_fops = {
+        .open           = pm_qos_dbg_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
+
 /**
  * pm_qos_update_target - manages the constraints list and calls the notifiers
  *  if needed
@@ -509,12 +586,17 @@ int pm_qos_remove_notifier(int pm_qos_class, struct notifier_block *notifier)
 EXPORT_SYMBOL_GPL(pm_qos_remove_notifier);
 
 /* User space interface to PM QoS classes via misc devices */
-static int register_pm_qos_misc(struct pm_qos_object *qos)
+static int register_pm_qos_misc(struct pm_qos_object *qos, struct dentry *d)
 {
         qos->pm_qos_power_miscdev.minor = MISC_DYNAMIC_MINOR;
         qos->pm_qos_power_miscdev.name = qos->name;
         qos->pm_qos_power_miscdev.fops = &pm_qos_power_fops;
 
+        if (d) {
+                (void)debugfs_create_file(qos->name, S_IRUGO, d,
+                                          (void *)qos, &pm_qos_debug_fops);
+        }
+
         return misc_register(&qos->pm_qos_power_miscdev);
 }
 
@@ -608,11 +690,16 @@ static int __init pm_qos_power_init(void)
 {
         int ret = 0;
         int i;
+        struct dentry *d;
 
         BUILD_BUG_ON(ARRAY_SIZE(pm_qos_array) != PM_QOS_NUM_CLASSES);
 
+        d = debugfs_create_dir("pm_qos", NULL);
+        if (IS_ERR_OR_NULL(d))
+                d = NULL;
+
         for (i = PM_QOS_CPU_DMA_LATENCY; i < PM_QOS_NUM_CLASSES; i++) {
-                ret = register_pm_qos_misc(pm_qos_array[i]);
+                ret = register_pm_qos_misc(pm_qos_array[i], d);
                 if (ret < 0) {
                         printk(KERN_ERR "pm_qos_param: %s setup failed\n",
                                pm_qos_array[i]->name);
diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c
index 0c40c16174b4..c24d5a23bf93 100644
--- a/kernel/power/snapshot.c
+++ b/kernel/power/snapshot.c
@@ -1472,9 +1472,9 @@ static inline unsigned long preallocate_highmem_fraction(unsigned long nr_pages,
 /**
  * free_unnecessary_pages - Release preallocated pages not needed for the image
  */
-static void free_unnecessary_pages(void)
+static unsigned long free_unnecessary_pages(void)
 {
-        unsigned long save, to_free_normal, to_free_highmem;
+        unsigned long save, to_free_normal, to_free_highmem, free;
 
         save = count_data_pages();
         if (alloc_normal >= save) {
@@ -1495,6 +1495,7 @@ static void free_unnecessary_pages(void)
                 else
                         to_free_normal = 0;
         }
+        free = to_free_normal + to_free_highmem;
 
         memory_bm_position_reset(&copy_bm);
 
@@ -1518,6 +1519,8 @@ static void free_unnecessary_pages(void)
                 swsusp_unset_page_free(page);
                 __free_page(page);
         }
+
+        return free;
 }
 
 /**
@@ -1707,7 +1710,7 @@ int hibernate_preallocate_memory(void)
          * pages in memory, but we have allocated more.  Release the excessive
          * ones now.
          */
-        free_unnecessary_pages();
+        pages -= free_unnecessary_pages();
 
  out:
         stop = ktime_get();
@@ -2310,8 +2313,6 @@ static inline void free_highmem_data(void)
                 free_image_page(buffer, PG_UNSAFE_CLEAR);
 }
 #else
-static inline int get_safe_write_buffer(void) { return 0; }
-
 static unsigned int
 count_highmem_image_pages(struct memory_bitmap *bm) { return 0; }
 
diff --git a/kernel/resource.c b/kernel/resource.c
index 0bcebffc4e77..19f2357dfda3 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -22,6 +22,7 @@
 #include <linux/device.h>
 #include <linux/pfn.h>
 #include <linux/mm.h>
+#include <linux/resource_ext.h>
 #include <asm/io.h>
 
 
@@ -1529,6 +1530,30 @@ int iomem_is_exclusive(u64 addr)
         return err;
 }
 
+struct resource_entry *resource_list_create_entry(struct resource *res,
+                                                  size_t extra_size)
+{
+        struct resource_entry *entry;
+
+        entry = kzalloc(sizeof(*entry) + extra_size, GFP_KERNEL);
+        if (entry) {
+                INIT_LIST_HEAD(&entry->node);
+                entry->res = res ? res : &entry->__res;
+        }
+
+        return entry;
+}
+EXPORT_SYMBOL(resource_list_create_entry);
+
+void resource_list_free(struct list_head *head)
+{
+        struct resource_entry *entry, *tmp;
+
+        list_for_each_entry_safe(entry, tmp, head, node)
+                resource_list_destroy_entry(entry);
+}
+EXPORT_SYMBOL(resource_list_free);
+
 static int __init strict_iomem(char *str)
 {
         if (strstr(str, "relaxed"))
diff --git a/kernel/trace/power-traces.c b/kernel/trace/power-traces.c
index 1c71382b283d..eb4220a132ec 100644
--- a/kernel/trace/power-traces.c
+++ b/kernel/trace/power-traces.c
@@ -13,5 +13,6 @@
 #define CREATE_TRACE_POINTS
 #include <trace/events/power.h>
 
+EXPORT_TRACEPOINT_SYMBOL_GPL(suspend_resume);
 EXPORT_TRACEPOINT_SYMBOL_GPL(cpu_idle);
 
diff --git a/tools/power/acpi/common/cmfsize.c b/tools/power/acpi/common/cmfsize.c
index f4b953354ff7..eec688041500 100644
--- a/tools/power/acpi/common/cmfsize.c
+++ b/tools/power/acpi/common/cmfsize.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/tools/power/acpi/common/getopt.c b/tools/power/acpi/common/getopt.c
index 2f0f34a36db4..5da129e10aa2 100644
--- a/tools/power/acpi/common/getopt.c
+++ b/tools/power/acpi/common/getopt.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/tools/power/acpi/os_specific/service_layers/oslibcfs.c b/tools/power/acpi/os_specific/service_layers/oslibcfs.c
index c13ff9c51d74..b51e40a9a120 100644
--- a/tools/power/acpi/os_specific/service_layers/oslibcfs.c
+++ b/tools/power/acpi/os_specific/service_layers/oslibcfs.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/tools/power/acpi/os_specific/service_layers/oslinuxtbl.c b/tools/power/acpi/os_specific/service_layers/oslinuxtbl.c
index 0dc2485dedf5..92f1fd700344 100644
--- a/tools/power/acpi/os_specific/service_layers/oslinuxtbl.c
+++ b/tools/power/acpi/os_specific/service_layers/oslinuxtbl.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/tools/power/acpi/os_specific/service_layers/osunixdir.c b/tools/power/acpi/os_specific/service_layers/osunixdir.c
index 733f9e490fc4..e153fcb12b1a 100644
--- a/tools/power/acpi/os_specific/service_layers/osunixdir.c
+++ b/tools/power/acpi/os_specific/service_layers/osunixdir.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/tools/power/acpi/os_specific/service_layers/osunixmap.c b/tools/power/acpi/os_specific/service_layers/osunixmap.c
index 99b47b6194a3..3853a7350440 100644
--- a/tools/power/acpi/os_specific/service_layers/osunixmap.c
+++ b/tools/power/acpi/os_specific/service_layers/osunixmap.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/tools/power/acpi/os_specific/service_layers/osunixxf.c b/tools/power/acpi/os_specific/service_layers/osunixxf.c
index 7ccb073f8316..6858c0893c91 100644
--- a/tools/power/acpi/os_specific/service_layers/osunixxf.c
+++ b/tools/power/acpi/os_specific/service_layers/osunixxf.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/tools/power/acpi/tools/acpidump/acpidump.h b/tools/power/acpi/tools/acpidump/acpidump.h
index a2d37d610639..84bdef0136cb 100644
--- a/tools/power/acpi/tools/acpidump/acpidump.h
+++ b/tools/power/acpi/tools/acpidump/acpidump.h
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/tools/power/acpi/tools/acpidump/apdump.c b/tools/power/acpi/tools/acpidump/apdump.c
index 24d32968802d..c736adf5fb55 100644
--- a/tools/power/acpi/tools/acpidump/apdump.c
+++ b/tools/power/acpi/tools/acpidump/apdump.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/tools/power/acpi/tools/acpidump/apfiles.c b/tools/power/acpi/tools/acpidump/apfiles.c
index d470046a6d81..8f2fe168228e 100644
--- a/tools/power/acpi/tools/acpidump/apfiles.c
+++ b/tools/power/acpi/tools/acpidump/apfiles.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/tools/power/acpi/tools/acpidump/apmain.c b/tools/power/acpi/tools/acpidump/apmain.c
index 853b4da22c3e..d0ba6535f5af 100644
--- a/tools/power/acpi/tools/acpidump/apmain.c
+++ b/tools/power/acpi/tools/acpidump/apmain.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2014, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/tools/power/cpupower/Makefile b/tools/power/cpupower/Makefile
index 2e2ba2efa0d9..3ed7c0476d48 100644
--- a/tools/power/cpupower/Makefile
+++ b/tools/power/cpupower/Makefile
@@ -209,7 +209,7 @@ $(OUTPUT)%.o: %.c
 
 $(OUTPUT)cpupower: $(UTIL_OBJS) $(OUTPUT)libcpupower.so.$(LIB_MAJ)
         $(ECHO) "  CC      " $@
-        $(QUIET) $(CC) $(CFLAGS) $(LDFLAGS) $(UTIL_OBJS) -lcpupower -lrt -lpci -L$(OUTPUT) -o $@
+        $(QUIET) $(CC) $(CFLAGS) $(LDFLAGS) $(UTIL_OBJS) -lcpupower -Wl,-rpath=./ -lrt -lpci -L$(OUTPUT) -o $@
         $(QUIET) $(STRIPCMD) $@
 
 $(OUTPUT)po/$(PACKAGE).pot: $(UTIL_SRC)
diff --git a/tools/power/x86/turbostat/turbostat.8 b/tools/power/x86/turbostat/turbostat.8
index 56bfb523c5bb..9b950699e63d 100644
--- a/tools/power/x86/turbostat/turbostat.8
+++ b/tools/power/x86/turbostat/turbostat.8
@@ -12,16 +12,16 @@ turbostat \- Report processor frequency and idle statistics
 .RB [ "\-i interval_sec" ]
 .SH DESCRIPTION
 \fBturbostat \fP reports processor topology, frequency,
-idle power-state statistics, temperature and power on modern X86 processors.
-Either \fBcommand\fP is forked and statistics are printed
-upon its completion, or statistics are printed periodically.
-
-\fBturbostat \fP
-must be run on root, and
-minimally requires that the processor
-supports an "invariant" TSC, plus the APERF and MPERF MSRs.
-Additional information is reported depending on hardware counter support.
-
+idle power-state statistics, temperature and power on X86 processors.
+There are two ways to invoke turbostat.
+The first method is to supply a
+\fBcommand\fP, which is forked and statistics are printed
+upon its completion.
+The second method is to omit the command,
+and turbodstat will print statistics every 5 seconds.
+The 5-second interval can changed using the -i option.
+
+Some information is not availalbe on older processors.
 .SS Options
 The \fB-p\fP option limits output to the 1st thread in 1st core of each package.
 .PP
@@ -130,12 +130,13 @@ cpu3: MSR_IA32_THERM_STATUS: 0x884e0000 (27 C +/- 1)
  ...
 .fi
 The \fBmax efficiency\fP frequency, a.k.a. Low Frequency Mode, is the frequency
-available at the minimum package voltage.  The \fBTSC frequency\fP is the nominal
-maximum frequency of the processor if turbo-mode were not available.  This frequency
+available at the minimum package voltage.  The \fBTSC frequency\fP is the base
+frequency of the processor -- this should match the brand string
+in /proc/cpuinfo.  This base frequency
 should be sustainable on all CPUs indefinitely, given nominal power and cooling.
 The remaining rows show what maximum turbo frequency is possible
-depending on the number of idle cores.  Note that this information is
-not available on all processors.
+depending on the number of idle cores.  Note that not all information is
+available on all processors.
 .SH FORK EXAMPLE
 If turbostat is invoked with a command, it will fork that command
 and output the statistics gathered when the command exits.
@@ -176,6 +177,11 @@ not including any non-busy idle time.
 
 .B "turbostat "
 must be run as root.
+Alternatively, non-root users can be enabled to run turbostat this way:
+
+# setcap cap_sys_rawio=ep ./turbostat
+
+# chmod +r /dev/cpu/*/msr
 
 .B "turbostat "
 reads hardware counters, but doesn't write them.
@@ -184,15 +190,33 @@ multiple invocations of itself.
 
 \fBturbostat \fP
 may work poorly on Linux-2.6.20 through 2.6.29,
-as \fBacpi-cpufreq \fPperiodically cleared the APERF and MPERF
+as \fBacpi-cpufreq \fPperiodically cleared the APERF and MPERF MSRs
 in those kernels.
 
-If the TSC column does not make sense, then
-the other numbers will also make no sense.
-Turbostat is lightweight, and its data collection is not atomic.
-These issues are usually caused by an extremely short measurement
-interval (much less than 1 second), or system activity that prevents
-turbostat from being able to run on all CPUS to quickly collect data.
+AVG_MHz = APERF_delta/measurement_interval.  This is the actual
+number of elapsed cycles divided by the entire sample interval --
+including idle time.  Note that this calculation is resiliant
+to systems lacking a non-stop TSC.
+
+TSC_MHz = TSC_delta/measurement_interval.
+On a system with an invariant TSC, this value will be constant
+and will closely match the base frequency value shown
+in the brand string in /proc/cpuinfo.  On a system where
+the TSC stops in idle, TSC_MHz will drop
+below the processor's base frequency.
+
+%Busy = MPERF_delta/TSC_delta
+
+Bzy_MHz = TSC_delta/APERF_delta/MPERF_delta/measurement_interval
+
+Note that these calculations depend on TSC_delta, so they
+are not reliable during intervals when TSC_MHz is not running at the base frequency.
+
+Turbostat data collection is not atomic.
+Extremely short measurement intervals (much less than 1 second),
+or system activity that prevents turbostat from being able
+to run on all CPUS to quickly collect data, will result in
+inconsistent results.
 
 The APERF, MPERF MSRs are defined to count non-halted cycles.
 Although it is not guaranteed by the architecture, turbostat assumes
diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index 5b1b807265a1..a02c02f25e88 100644
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -38,6 +38,8 @@
 #include <ctype.h>
 #include <sched.h>
 #include <cpuid.h>
+#include <linux/capability.h>
+#include <errno.h>
 
 char *proc_stat = "/proc/stat";
 unsigned int interval_sec = 5;  /* set with -i interval_sec */
@@ -59,8 +61,8 @@ unsigned int has_epb;
 unsigned int units = 1000000;   /* MHz etc */
 unsigned int genuine_intel;
 unsigned int has_invariant_tsc;
-unsigned int do_nehalem_platform_info;
-unsigned int do_nehalem_turbo_ratio_limit;
+unsigned int do_nhm_platform_info;
+unsigned int do_nhm_turbo_ratio_limit;
 unsigned int do_ivt_turbo_ratio_limit;
 unsigned int extra_msr_offset32;
 unsigned int extra_msr_offset64;
@@ -81,6 +83,9 @@ unsigned int tcc_activation_temp;
 unsigned int tcc_activation_temp_override;
 double rapl_power_units, rapl_energy_units, rapl_time_units;
 double rapl_joule_counter_range;
+unsigned int do_core_perf_limit_reasons;
+unsigned int do_gfx_perf_limit_reasons;
+unsigned int do_ring_perf_limit_reasons;
 
 #define RAPL_PKG                (1 << 0)
                                         /* 0x610 MSR_PKG_POWER_LIMIT */
@@ -251,15 +256,13 @@ int get_msr(int cpu, off_t offset, unsigned long long *msr)
         sprintf(pathname, "/dev/cpu/%d/msr", cpu);
         fd = open(pathname, O_RDONLY);
         if (fd < 0)
-                return -1;
+                err(-1, "%s open failed, try chown or chmod +r /dev/cpu/*/msr, or run as root", pathname);
 
         retval = pread(fd, msr, sizeof *msr, offset);
         close(fd);
 
-        if (retval != sizeof *msr) {
-                fprintf(stderr, "%s offset 0x%llx read failed\n", pathname, (unsigned long long)offset);
-                return -1;
-        }
+        if (retval != sizeof *msr)
+                err(-1, "%s offset 0x%llx read failed", pathname, (unsigned long long)offset);
 
         return 0;
 }
@@ -281,7 +284,7 @@ void print_header(void)
                 outp += sprintf(outp, "     CPU");
         if (has_aperf)
                 outp += sprintf(outp, " Avg_MHz");
-        if (do_nhm_cstates)
+        if (has_aperf)
                 outp += sprintf(outp, "   %%Busy");
         if (has_aperf)
                 outp += sprintf(outp, " Bzy_MHz");
@@ -337,7 +340,7 @@ void print_header(void)
                         outp += sprintf(outp, "   PKG_%%");
                 if (do_rapl & RAPL_DRAM_PERF_STATUS)
                         outp += sprintf(outp, "   RAM_%%");
-        } else {
+        } else if (do_rapl && rapl_joules) {
                 if (do_rapl & RAPL_PKG)
                         outp += sprintf(outp, "   Pkg_J");
                 if (do_rapl & RAPL_CORES)
@@ -457,25 +460,25 @@ int format_counters(struct thread_data *t, struct core_data *c,
                         outp += sprintf(outp, "%8d", t->cpu_id);
         }
 
-        /* AvgMHz */
+        /* Avg_MHz */
         if (has_aperf)
                 outp += sprintf(outp, "%8.0f",
                         1.0 / units * t->aperf / interval_float);
 
-        /* %c0 */
-        if (do_nhm_cstates) {
+        /* %Busy */
+        if (has_aperf) {
                 if (!skip_c0)
                         outp += sprintf(outp, "%8.2f", 100.0 * t->mperf/t->tsc);
                 else
                         outp += sprintf(outp, "********");
         }
 
-        /* BzyMHz */
+        /* Bzy_MHz */
         if (has_aperf)
                 outp += sprintf(outp, "%8.0f",
                         1.0 * t->tsc / units * t->aperf / t->mperf / interval_float);
 
-        /* TSC */
+        /* TSC_MHz */
         outp += sprintf(outp, "%8.0f", 1.0 * t->tsc/units/interval_float);
 
         /* SMI */
@@ -561,7 +564,7 @@ int format_counters(struct thread_data *t, struct core_data *c,
                         outp += sprintf(outp, fmt8, 100.0 * p->rapl_pkg_perf_status * rapl_time_units / interval_float);
                 if (do_rapl & RAPL_DRAM_PERF_STATUS)
                         outp += sprintf(outp, fmt8, 100.0 * p->rapl_dram_perf_status * rapl_time_units / interval_float);
-        } else {
+        } else if (do_rapl && rapl_joules) {
                 if (do_rapl & RAPL_PKG)
                         outp += sprintf(outp, fmt8,
                                         p->energy_pkg * rapl_energy_units);
@@ -578,8 +581,8 @@ int format_counters(struct thread_data *t, struct core_data *c,
                         outp += sprintf(outp, fmt8, 100.0 * p->rapl_pkg_perf_status * rapl_time_units / interval_float);
                 if (do_rapl & RAPL_DRAM_PERF_STATUS)
                         outp += sprintf(outp, fmt8, 100.0 * p->rapl_dram_perf_status * rapl_time_units / interval_float);
-        outp += sprintf(outp, fmt8, interval_float);
 
+                outp += sprintf(outp, fmt8, interval_float);
         }
 done:
         outp += sprintf(outp, "\n");
@@ -670,24 +673,26 @@ delta_thread(struct thread_data *new, struct thread_data *old,
 
         old->c1 = new->c1 - old->c1;
 
-        if ((new->aperf > old->aperf) && (new->mperf > old->mperf)) {
-                old->aperf = new->aperf - old->aperf;
-                old->mperf = new->mperf - old->mperf;
-        } else {
+        if (has_aperf) {
+                if ((new->aperf > old->aperf) && (new->mperf > old->mperf)) {
+                        old->aperf = new->aperf - old->aperf;
+                        old->mperf = new->mperf - old->mperf;
+                } else {
 
-                if (!aperf_mperf_unstable) {
-                        fprintf(stderr, "%s: APERF or MPERF went backwards *\n", progname);
-                        fprintf(stderr, "* Frequency results do not cover entire interval *\n");
-                        fprintf(stderr, "* fix this by running Linux-2.6.30 or later *\n");
+                        if (!aperf_mperf_unstable) {
+                                fprintf(stderr, "%s: APERF or MPERF went backwards *\n", progname);
+                                fprintf(stderr, "* Frequency results do not cover entire interval *\n");
+                                fprintf(stderr, "* fix this by running Linux-2.6.30 or later *\n");
 
-                        aperf_mperf_unstable = 1;
+                                aperf_mperf_unstable = 1;
+                        }
+                        /*
+                         * mperf delta is likely a huge "positive" number
+                         * can not use it for calculating c0 time
+                         */
+                        skip_c0 = 1;
+                        skip_c1 = 1;
                 }
-                /*
-                 * mperf delta is likely a huge "positive" number
-                 * can not use it for calculating c0 time
-                 */
-                skip_c0 = 1;
-                skip_c1 = 1;
         }
 
 
@@ -1019,7 +1024,7 @@ void print_verbose_header(void)
         unsigned long long msr;
         unsigned int ratio;
 
-        if (!do_nehalem_platform_info)
+        if (!do_nhm_platform_info)
                 return;
 
         get_msr(0, MSR_NHM_PLATFORM_INFO, &msr);
@@ -1132,7 +1137,7 @@ print_nhm_turbo_ratio_limits:
         }
         fprintf(stderr, ")\n");
 
-        if (!do_nehalem_turbo_ratio_limit)
+        if (!do_nhm_turbo_ratio_limit)
                 return;
 
         get_msr(0, MSR_NHM_TURBO_RATIO_LIMIT, &msr);
@@ -1178,6 +1183,7 @@ print_nhm_turbo_ratio_limits:
         if (ratio)
                 fprintf(stderr, "%d * %.0f = %.0f MHz max turbo 1 active cores\n",
                         ratio, bclk, ratio * bclk);
+
 }
 
 void free_all_buffers(void)
@@ -1458,17 +1464,60 @@ void check_dev_msr()
         struct stat sb;
 
         if (stat("/dev/cpu/0/msr", &sb))
-                err(-5, "no /dev/cpu/0/msr\n"
-                    "Try \"# modprobe msr\"");
+                err(-5, "no /dev/cpu/0/msr, Try \"# modprobe msr\" ");
 }
 
-void check_super_user()
+void check_permissions()
 {
-        if (getuid() != 0)
-                errx(-6, "must be root");
+        struct __user_cap_header_struct cap_header_data;
+        cap_user_header_t cap_header = &cap_header_data;
+        struct __user_cap_data_struct cap_data_data;
+        cap_user_data_t cap_data = &cap_data_data;
+        extern int capget(cap_user_header_t hdrp, cap_user_data_t datap);
+        int do_exit = 0;
+
+        /* check for CAP_SYS_RAWIO */
+        cap_header->pid = getpid();
+        cap_header->version = _LINUX_CAPABILITY_VERSION;
+        if (capget(cap_header, cap_data) < 0)
+                err(-6, "capget(2) failed");
+
+        if ((cap_data->effective & (1 << CAP_SYS_RAWIO)) == 0) {
+                do_exit++;
+                warnx("capget(CAP_SYS_RAWIO) failed,"
+                        " try \"# setcap cap_sys_rawio=ep %s\"", progname);
+        }
+
+        /* test file permissions */
+        if (euidaccess("/dev/cpu/0/msr", R_OK)) {
+                do_exit++;
+                warn("/dev/cpu/0/msr open failed, try chown or chmod +r /dev/cpu/*/msr");
+        }
+
+        /* if all else fails, thell them to be root */
+        if (do_exit)
+                if (getuid() != 0)
+                        warnx("... or simply run as root");
+
+        if (do_exit)
+                exit(-6);
 }
 
-int has_nehalem_turbo_ratio_limit(unsigned int family, unsigned int model)
+/*
+ * NHM adds support for additional MSRs:
+ *
+ * MSR_SMI_COUNT                   0x00000034
+ *
+ * MSR_NHM_PLATFORM_INFO           0x000000ce
+ * MSR_NHM_SNB_PKG_CST_CFG_CTL     0x000000e2
+ *
+ * MSR_PKG_C3_RESIDENCY            0x000003f8
+ * MSR_PKG_C6_RESIDENCY            0x000003f9
+ * MSR_CORE_C3_RESIDENCY           0x000003fc
+ * MSR_CORE_C6_RESIDENCY           0x000003fd
+ *
+ */
+int has_nhm_msrs(unsigned int family, unsigned int model)
 {
         if (!genuine_intel)
                 return 0;
@@ -1495,13 +1544,27 @@ int has_nehalem_turbo_ratio_limit(unsigned int family, unsigned int model)
         case 0x3D:      /* BDW */
         case 0x4F:      /* BDX */
         case 0x56:      /* BDX-DE */
-                return 1;
         case 0x2E:      /* Nehalem-EX Xeon - Beckton */
         case 0x2F:      /* Westmere-EX Xeon - Eagleton */
+                return 1;
         default:
                 return 0;
         }
 }
+int has_nhm_turbo_ratio_limit(unsigned int family, unsigned int model)
+{
+        if (!has_nhm_msrs(family, model))
+                return 0;
+
+        switch (model) {
+        /* Nehalem compatible, but do not include turbo-ratio limit support */
+        case 0x2E:      /* Nehalem-EX Xeon - Beckton */
+        case 0x2F:      /* Westmere-EX Xeon - Eagleton */
+                return 0;
+        default:
+                return 1;
+        }
+}
 int has_ivt_turbo_ratio_limit(unsigned int family, unsigned int model)
 {
         if (!genuine_intel)
@@ -1564,6 +1627,103 @@ int print_epb(struct thread_data *t, struct core_data *c, struct pkg_data *p)
         return 0;
 }
 
+/*
+ * print_perf_limit()
+ */
+int print_perf_limit(struct thread_data *t, struct core_data *c, struct pkg_data *p)
+{
+        unsigned long long msr;
+        int cpu;
+
+        cpu = t->cpu_id;
+
+        /* per-package */
+        if (!(t->flags & CPU_IS_FIRST_THREAD_IN_CORE) || !(t->flags & CPU_IS_FIRST_CORE_IN_PACKAGE))
+                return 0;
+
+        if (cpu_migrate(cpu)) {
+                fprintf(stderr, "Could not migrate to CPU %d\n", cpu);
+                return -1;
+        }
+
+        if (do_core_perf_limit_reasons) {
+                get_msr(cpu, MSR_CORE_PERF_LIMIT_REASONS, &msr);
+                fprintf(stderr, "cpu%d: MSR_CORE_PERF_LIMIT_REASONS, 0x%08llx", cpu, msr);
+                fprintf(stderr, " (Active: %s%s%s%s%s%s%s%s%s%s%s%s%s%s)",
+                        (msr & 1 << 0) ? "PROCHOT, " : "",
+                        (msr & 1 << 1) ? "ThermStatus, " : "",
+                        (msr & 1 << 2) ? "bit2, " : "",
+                        (msr & 1 << 4) ? "Graphics, " : "",
+                        (msr & 1 << 5) ? "Auto-HWP, " : "",
+                        (msr & 1 << 6) ? "VR-Therm, " : "",
+                        (msr & 1 << 8) ? "Amps, " : "",
+                        (msr & 1 << 9) ? "CorePwr, " : "",
+                        (msr & 1 << 10) ? "PkgPwrL1, " : "",
+                        (msr & 1 << 11) ? "PkgPwrL2, " : "",
+                        (msr & 1 << 12) ? "MultiCoreTurbo, " : "",
+                        (msr & 1 << 13) ? "Transitions, " : "",
+                        (msr & 1 << 14) ? "bit14, " : "",
+                        (msr & 1 << 15) ? "bit15, " : "");
+                fprintf(stderr, " (Logged: %s%s%s%s%s%s%s%s%s%s%s%s%s%s)\n",
+                        (msr & 1 << 16) ? "PROCHOT, " : "",
+                        (msr & 1 << 17) ? "ThermStatus, " : "",
+                        (msr & 1 << 18) ? "bit18, " : "",
+                        (msr & 1 << 20) ? "Graphics, " : "",
+                        (msr & 1 << 21) ? "Auto-HWP, " : "",
+                        (msr & 1 << 22) ? "VR-Therm, " : "",
+                        (msr & 1 << 24) ? "Amps, " : "",
+                        (msr & 1 << 25) ? "CorePwr, " : "",
+                        (msr & 1 << 26) ? "PkgPwrL1, " : "",
+                        (msr & 1 << 27) ? "PkgPwrL2, " : "",
+                        (msr & 1 << 28) ? "MultiCoreTurbo, " : "",
+                        (msr & 1 << 29) ? "Transitions, " : "",
+                        (msr & 1 << 30) ? "bit30, " : "",
+                        (msr & 1 << 31) ? "bit31, " : "");
+
+        }
+        if (do_gfx_perf_limit_reasons) {
+                get_msr(cpu, MSR_GFX_PERF_LIMIT_REASONS, &msr);
+                fprintf(stderr, "cpu%d: MSR_GFX_PERF_LIMIT_REASONS, 0x%08llx", cpu, msr);
+                fprintf(stderr, " (Active: %s%s%s%s%s%s%s%s)",
+                        (msr & 1 << 0) ? "PROCHOT, " : "",
+                        (msr & 1 << 1) ? "ThermStatus, " : "",
+                        (msr & 1 << 4) ? "Graphics, " : "",
+                        (msr & 1 << 6) ? "VR-Therm, " : "",
+                        (msr & 1 << 8) ? "Amps, " : "",
+                        (msr & 1 << 9) ? "GFXPwr, " : "",
+                        (msr & 1 << 10) ? "PkgPwrL1, " : "",
+                        (msr & 1 << 11) ? "PkgPwrL2, " : "");
+                fprintf(stderr, " (Logged: %s%s%s%s%s%s%s%s)\n",
+                        (msr & 1 << 16) ? "PROCHOT, " : "",
+                        (msr & 1 << 17) ? "ThermStatus, " : "",
+                        (msr & 1 << 20) ? "Graphics, " : "",
+                        (msr & 1 << 22) ? "VR-Therm, " : "",
+                        (msr & 1 << 24) ? "Amps, " : "",
+                        (msr & 1 << 25) ? "GFXPwr, " : "",
+                        (msr & 1 << 26) ? "PkgPwrL1, " : "",
+                        (msr & 1 << 27) ? "PkgPwrL2, " : "");
+        }
+        if (do_ring_perf_limit_reasons) {
+                get_msr(cpu, MSR_RING_PERF_LIMIT_REASONS, &msr);
+                fprintf(stderr, "cpu%d: MSR_RING_PERF_LIMIT_REASONS, 0x%08llx", cpu, msr);
+                fprintf(stderr, " (Active: %s%s%s%s%s%s)",
+                        (msr & 1 << 0) ? "PROCHOT, " : "",
+                        (msr & 1 << 1) ? "ThermStatus, " : "",
+                        (msr & 1 << 6) ? "VR-Therm, " : "",
+                        (msr & 1 << 8) ? "Amps, " : "",
+                        (msr & 1 << 10) ? "PkgPwrL1, " : "",
+                        (msr & 1 << 11) ? "PkgPwrL2, " : "");
+                fprintf(stderr, " (Logged: %s%s%s%s%s%s)\n",
+                        (msr & 1 << 16) ? "PROCHOT, " : "",
+                        (msr & 1 << 17) ? "ThermStatus, " : "",
+                        (msr & 1 << 22) ? "VR-Therm, " : "",
+                        (msr & 1 << 24) ? "Amps, " : "",
+                        (msr & 1 << 26) ? "PkgPwrL1, " : "",
+                        (msr & 1 << 27) ? "PkgPwrL2, " : "");
+        }
+        return 0;
+}
+
 #define RAPL_POWER_GRANULARITY  0x7FFF  /* 15 bit power granularity */
 #define RAPL_TIME_GRANULARITY   0x3F /* 6 bit time granularity */
 
@@ -1653,6 +1813,27 @@ void rapl_probe(unsigned int family, unsigned int model)
         return;
 }
 
+void perf_limit_reasons_probe(family, model)
+{
+        if (!genuine_intel)
+                return;
+
+        if (family != 6)
+                return;
+
+        switch (model) {
+        case 0x3C:      /* HSW */
+        case 0x45:      /* HSW */
+        case 0x46:      /* HSW */
+                do_gfx_perf_limit_reasons = 1;
+        case 0x3F:      /* HSX */
+                do_core_perf_limit_reasons = 1;
+                do_ring_perf_limit_reasons = 1;
+        default:
+                return;
+        }
+}
+
 int print_thermal(struct thread_data *t, struct core_data *c, struct pkg_data *p)
 {
         unsigned long long msr;
@@ -1842,8 +2023,15 @@ int print_rapl(struct thread_data *t, struct core_data *c, struct pkg_data *p)
         return 0;
 }
 
+/*
+ * SNB adds support for additional MSRs:
+ *
+ * MSR_PKG_C7_RESIDENCY            0x000003fa
+ * MSR_CORE_C7_RESIDENCY           0x000003fe
+ * MSR_PKG_C2_RESIDENCY            0x0000060d
+ */
 
-int is_snb(unsigned int family, unsigned int model)
+int has_snb_msrs(unsigned int family, unsigned int model)
 {
         if (!genuine_intel)
                 return 0;
@@ -1865,7 +2053,14 @@ int is_snb(unsigned int family, unsigned int model)
         return 0;
 }
 
-int has_c8_c9_c10(unsigned int family, unsigned int model)
+/*
+ * HSW adds support for additional MSRs:
+ *
+ * MSR_PKG_C8_RESIDENCY            0x00000630
+ * MSR_PKG_C9_RESIDENCY            0x00000631
+ * MSR_PKG_C10_RESIDENCY           0x00000632
+ */
+int has_hsw_msrs(unsigned int family, unsigned int model)
 {
         if (!genuine_intel)
                 return 0;
@@ -1917,7 +2112,7 @@ double slm_bclk(void)
 
 double discover_bclk(unsigned int family, unsigned int model)
 {
-        if (is_snb(family, model))
+        if (has_snb_msrs(family, model))
                 return 100.00;
         else if (is_slm(family, model))
                 return slm_bclk();
@@ -1965,7 +2160,7 @@ int set_temperature_target(struct thread_data *t, struct core_data *c, struct pk
         }
 
         /* Temperature Target MSR is Nehalem and newer only */
-        if (!do_nehalem_platform_info)
+        if (!do_nhm_platform_info)
                 goto guess;
 
         if (get_msr(0, MSR_IA32_TEMPERATURE_TARGET, &msr))
@@ -2029,18 +2224,15 @@ void check_cpuid()
         ebx = ecx = edx = 0;
         __get_cpuid(0x80000000, &max_level, &ebx, &ecx, &edx);
 
-        if (max_level < 0x80000007)
-                errx(1, "CPUID: no invariant TSC (max_level 0x%x)", max_level);
+        if (max_level >= 0x80000007) {
 
-        /*
-         * Non-Stop TSC is advertised by CPUID.EAX=0x80000007: EDX.bit8
-         * this check is valid for both Intel and AMD
-         */
-        __get_cpuid(0x80000007, &eax, &ebx, &ecx, &edx);
-        has_invariant_tsc = edx & (1 << 8);
-
-        if (!has_invariant_tsc)
-                errx(1, "No invariant TSC");
+                /*
+                 * Non-Stop TSC is advertised by CPUID.EAX=0x80000007: EDX.bit8
+                 * this check is valid for both Intel and AMD
+                 */
+                __get_cpuid(0x80000007, &eax, &ebx, &ecx, &edx);
+                has_invariant_tsc = edx & (1 << 8);
+        }
 
         /*
          * APERF/MPERF is advertised by CPUID.EAX=0x6: ECX.bit0
@@ -2054,26 +2246,22 @@ void check_cpuid()
         has_epb = ecx & (1 << 3);
 
         if (verbose)
-                fprintf(stderr, "CPUID(6): %s%s%s%s\n",
-                        has_aperf ? "APERF" : "No APERF!",
-                        do_dts ? ", DTS" : "",
-                        do_ptm ? ", PTM": "",
-                        has_epb ? ", EPB": "");
-
-        if (!has_aperf)
-                errx(-1, "No APERF");
-
-        do_nehalem_platform_info = genuine_intel && has_invariant_tsc;
-        do_nhm_cstates = genuine_intel; /* all Intel w/ non-stop TSC have NHM counters */
-        do_smi = do_nhm_cstates;
-        do_snb_cstates = is_snb(family, model);
-        do_c8_c9_c10 = has_c8_c9_c10(family, model);
+                fprintf(stderr, "CPUID(6): %sAPERF, %sDTS, %sPTM, %sEPB\n",
+                        has_aperf ? "" : "No ",
+                        do_dts ? "" : "No ",
+                        do_ptm ? "" : "No ",
+                        has_epb ? "" : "No ");
+
+        do_nhm_platform_info = do_nhm_cstates = do_smi = has_nhm_msrs(family, model);
+        do_snb_cstates = has_snb_msrs(family, model);
+        do_c8_c9_c10 = has_hsw_msrs(family, model);
         do_slm_cstates = is_slm(family, model);
         bclk = discover_bclk(family, model);
 
-        do_nehalem_turbo_ratio_limit = has_nehalem_turbo_ratio_limit(family, model);
+        do_nhm_turbo_ratio_limit = has_nhm_turbo_ratio_limit(family, model);
         do_ivt_turbo_ratio_limit = has_ivt_turbo_ratio_limit(family, model);
         rapl_probe(family, model);
+        perf_limit_reasons_probe(family, model);
 
         return;
 }
@@ -2299,10 +2487,9 @@ void setup_all_buffers(void)
 
 void turbostat_init()
 {
-        check_cpuid();
-
         check_dev_msr();
-        check_super_user();
+        check_permissions();
+        check_cpuid();
 
         setup_all_buffers();
 
@@ -2313,6 +2500,9 @@ void turbostat_init()
                 for_all_cpus(print_epb, ODD_COUNTERS);
 
         if (verbose)
+                for_all_cpus(print_perf_limit, ODD_COUNTERS);
+
+        if (verbose)
                 for_all_cpus(print_rapl, ODD_COUNTERS);
 
         for_all_cpus(set_temperature_target, ODD_COUNTERS);
@@ -2441,7 +2631,7 @@ int main(int argc, char **argv)
         cmdline(argc, argv);
 
         if (verbose)
-                fprintf(stderr, "turbostat v3.7 Feb 6, 2014"
+                fprintf(stderr, "turbostat v3.9 23-Jan, 2015"
                         " - Len Brown <lenb@kernel.org>\n");
 
         turbostat_init();