34 files changed, 2662 insertions, 433 deletions

diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index ccf6ea95f68c..0065f3794576 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -186,6 +186,7 @@ config ACPI_HOTPLUG_CPU
 config ACPI_THERMAL
         tristate "Thermal Zone"
         depends on ACPI_PROCESSOR
+        select THERMAL
         default y
         help
           This driver adds support for ACPI thermal zones.  Most mobile and
@@ -199,6 +200,16 @@ config ACPI_NUMA
         depends on (X86 || IA64)
         default y if IA64_GENERIC || IA64_SGI_SN2
 
+config ACPI_WMI
+        tristate "WMI (EXPERIMENTAL)"
+        depends on EXPERIMENTAL
+        help
+          This driver adds support for the ACPI-WMI mapper device (PNP0C14)
+          found on some systems.
+
+          NOTE: You will need another driver or userspace application on top of
+          this to actually use anything defined in the ACPI-WMI mapper.
+
 config ACPI_ASUS
         tristate "ASUS/Medion Laptop Extras"
         depends on X86
diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
index 456446f90077..f29812a86533 100644
--- a/drivers/acpi/Makefile
+++ b/drivers/acpi/Makefile
@@ -55,6 +55,7 @@ obj-$(CONFIG_ACPI_THERMAL)	+= thermal.o
 obj-$(CONFIG_ACPI_SYSTEM)       += system.o event.o
 obj-$(CONFIG_ACPI_DEBUG)        += debug.o
 obj-$(CONFIG_ACPI_NUMA)         += numa.o
+obj-$(CONFIG_ACPI_WMI)          += wmi.o
 obj-$(CONFIG_ACPI_ASUS)         += asus_acpi.o
 obj-$(CONFIG_ACPI_TOSHIBA)      += toshiba_acpi.o
 obj-$(CONFIG_ACPI_HOTPLUG_MEMORY)       += acpi_memhotplug.o
diff --git a/drivers/acpi/asus_acpi.c b/drivers/acpi/asus_acpi.c
index d915fec9bf63..d25ef961415c 100644
--- a/drivers/acpi/asus_acpi.c
+++ b/drivers/acpi/asus_acpi.c
@@ -142,6 +142,7 @@ struct asus_hotk {
                 xxN,            //M2400N, M3700N, M5200N, M6800N, S1300N, S5200N
                 A4S,            //Z81sp
                 //(Centrino)
+                F3Sa,
                 END_MODEL
         } model;                //Models currently supported
         u16 event_count[128];   //count for each event TODO make this better
@@ -405,7 +406,20 @@ static struct model_data model_conf[END_MODEL] = {
                 .brightness_get    = "GPLV",
                 .mt_bt_switch      = "BLED",
                 .mt_wled           = "WLED"
-        }
+        },
+
+        {
+                .name           = "F3Sa",
+                .mt_bt_switch   = "BLED",
+                .mt_wled        = "WLED",
+                .mt_mled        = "MLED",
+                .brightness_get = "GPLV",
+                .brightness_set = "SPLV",
+                .mt_lcd_switch  = "\\_SB.PCI0.SBRG.EC0._Q10",
+                .lcd_status     = "\\_SB.PCI0.SBRG.EC0.RPIN",
+                .display_get    = "\\ADVG",
+                .display_set    = "SDSP",
+        },
 
 };
 
@@ -710,15 +724,8 @@ static int get_lcd_state(void)
 {
         int lcd = 0;
 
-        if (hotk->model != L3H) {
-                /* We don't have to check anything if we are here */
-                if (!read_acpi_int(NULL, hotk->methods->lcd_status, &lcd))
-                        printk(KERN_WARNING
-                               "Asus ACPI: Error reading LCD status\n");
-
-                if (hotk->model == L2D)
-                        lcd = ~lcd;
-        } else {                /* L3H and the like have to be handled differently */
+        if (hotk->model == L3H) {
+                /* L3H and the like have to be handled differently */
                 acpi_status status = 0;
                 struct acpi_object_list input;
                 union acpi_object mt_params[2];
@@ -745,6 +752,32 @@ static int get_lcd_state(void)
                 if (out_obj.type == ACPI_TYPE_INTEGER)
                         /* That's what the AML code does */
                         lcd = out_obj.integer.value >> 8;
+        } else if (hotk->model == F3Sa) {
+                unsigned long tmp;
+                union acpi_object param;
+                struct acpi_object_list input;
+                acpi_status status;
+
+                /* Read pin 11 */
+                param.type = ACPI_TYPE_INTEGER;
+                param.integer.value = 0x11;
+                input.count = 1;
+                input.pointer = &param;
+
+                status = acpi_evaluate_integer(NULL, hotk->methods->lcd_status,
+                                                &input, &tmp);
+                if (status != AE_OK)
+                        return -1;
+
+                lcd = tmp;
+        } else {
+                /* We don't have to check anything if we are here */
+                if (!read_acpi_int(NULL, hotk->methods->lcd_status, &lcd))
+                        printk(KERN_WARNING
+                               "Asus ACPI: Error reading LCD status\n");
+
+                if (hotk->model == L2D)
+                        lcd = ~lcd;
         }
 
         return (lcd & 1);
@@ -1134,6 +1167,8 @@ static int asus_model_match(char *model)
                 return W5A;
         else if (strncmp(model, "A4S", 3) == 0)
                 return A4S;
+        else if (strncmp(model, "F3Sa", 4) == 0)
+                return F3Sa;
         else
                 return END_MODEL;
 }
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index c4a769d1ba85..f6215e809808 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -194,6 +194,9 @@ static int acpi_battery_get_property(struct power_supply *psy,
         case POWER_SUPPLY_PROP_MANUFACTURER:
                 val->strval = battery->oem_info;
                 break;
+        case POWER_SUPPLY_PROP_SERIAL_NUMBER:
+                val->strval = battery->serial_number;
+                break;
         default:
                 return -EINVAL;
         }
@@ -212,6 +215,7 @@ static enum power_supply_property charge_battery_props[] = {
         POWER_SUPPLY_PROP_CHARGE_NOW,
         POWER_SUPPLY_PROP_MODEL_NAME,
         POWER_SUPPLY_PROP_MANUFACTURER,
+        POWER_SUPPLY_PROP_SERIAL_NUMBER,
 };
 
 static enum power_supply_property energy_battery_props[] = {
@@ -226,6 +230,7 @@ static enum power_supply_property energy_battery_props[] = {
         POWER_SUPPLY_PROP_ENERGY_NOW,
         POWER_SUPPLY_PROP_MODEL_NAME,
         POWER_SUPPLY_PROP_MANUFACTURER,
+        POWER_SUPPLY_PROP_SERIAL_NUMBER,
 };
 #endif
 
diff --git a/drivers/acpi/bay.c b/drivers/acpi/bay.c
index 6daf6088ac88..477711435b24 100644
--- a/drivers/acpi/bay.c
+++ b/drivers/acpi/bay.c
@@ -46,6 +46,12 @@ MODULE_LICENSE("GPL");
         printk(KERN_DEBUG PREFIX "%s: %s\n", prefix, s); }
 static void bay_notify(acpi_handle handle, u32 event, void *data);
 
+static const struct acpi_device_id bay_device_ids[] = {
+        {"LNXIOBAY", 0},
+        {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, bay_device_ids);
+
 struct bay {
         acpi_handle handle;
         char *name;
diff --git a/drivers/acpi/blacklist.c b/drivers/acpi/blacklist.c
index 8809654d6cc9..6dbaa2d15fe0 100644
--- a/drivers/acpi/blacklist.c
+++ b/drivers/acpi/blacklist.c
@@ -70,8 +70,6 @@ static struct acpi_blacklist_item acpi_blacklist[] __initdata = {
         /* IBM 600E - _ADR should return 7, but it returns 1 */
         {"IBM   ", "TP600E  ", 0x00000105, ACPI_SIG_DSDT, less_than_or_equal,
          "Incorrect _ADR", 1},
-        {"ASUS\0\0", "P2B-S   ", 0, ACPI_SIG_DSDT, all_versions,
-         "Bogus PCI routing", 1},
 
         {""}
 };
@@ -208,33 +206,35 @@ static struct dmi_system_id acpi_osi_dmi_table[] __initdata = {
          * Disable OSI(Linux) warnings on all "Acer, inc."
          *
          * _OSI(Linux) disables the latest Windows BIOS code:
+         * DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3100"),
          * DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5050"),
+         * DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5100"),
          * DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5580"),
          * DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 3010"),
          * _OSI(Linux) effect unknown:
          * DMI_MATCH(DMI_PRODUCT_NAME, "Ferrari 5000"),
          */
-        {
-        .callback = dmi_disable_osi_linux,
-        .ident = "Acer, inc.",
-        .matches = {
-                     DMI_MATCH(DMI_SYS_VENDOR, "Acer, inc."),
-                },
-        },
+        /*
+         * note that dmi_check_system() uses strstr()
+         * to match sub-strings rather than !strcmp(),
+         * so "Acer" below matches "Acer, inc." above.
+         */
         /*
          * Disable OSI(Linux) warnings on all "Acer"
          *
          * _OSI(Linux) effect unknown:
-         * DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5100"),
          * DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5610"),
          * DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720Z"),
          * DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 5520"),
          * DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 6460"),
          * DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 7510"),
          * DMI_MATCH(DMI_PRODUCT_NAME, "Extensa 5220"),
+         *
+         * _OSI(Linux) is a NOP:
+         * DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5315"),
          */
         {
-        .callback = dmi_unknown_osi_linux,
+        .callback = dmi_disable_osi_linux,
         .ident = "Acer",
         .matches = {
                      DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
@@ -242,21 +242,22 @@ static struct dmi_system_id acpi_osi_dmi_table[] __initdata = {
         },
         /*
          * Disable OSI(Linux) warnings on all "Apple Computer, Inc."
+         * Disable OSI(Linux) warnings on all "Apple Inc."
          *
          * _OSI(Linux) confirmed to be a NOP:
          * DMI_MATCH(DMI_PRODUCT_NAME, "MacBook1,1"),
          * DMI_MATCH(DMI_PRODUCT_NAME, "MacBook2,1"),
          * DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro2,2"),
+         * DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro3,1"),
          * _OSI(Linux) effect unknown:
          * DMI_MATCH(DMI_PRODUCT_NAME, "MacPro2,1"),
          * DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro1,1"),
-         * DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro3,1"),
          */
         {
         .callback = dmi_disable_osi_linux,
         .ident = "Apple",
         .matches = {
-                     DMI_MATCH(DMI_SYS_VENDOR, "Apple Computer, Inc."),
+                     DMI_MATCH(DMI_SYS_VENDOR, "Apple"),
                 },
         },
         /*
@@ -294,13 +295,13 @@ static struct dmi_system_id acpi_osi_dmi_table[] __initdata = {
          * DMI_MATCH(DMI_BOARD_NAME, "IFL91"),
          */
         {
-        .callback = dmi_unknown_osi_linux,
+        .callback = dmi_disable_osi_linux,
         .ident = "Compal",
         .matches = {
                      DMI_MATCH(DMI_BIOS_VENDOR, "COMPAL"),
                 },
         },
-        { /* OSI(Linux) touches USB, breaks suspend to disk */
+        { /* OSI(Linux) touches USB, unknown side-effect */
         .callback = dmi_disable_osi_linux,
         .ident = "Dell Dimension 5150",
         .matches = {
@@ -310,7 +311,7 @@ static struct dmi_system_id acpi_osi_dmi_table[] __initdata = {
         },
         { /* OSI(Linux) is a NOP */
         .callback = dmi_disable_osi_linux,
-        .ident = "Dell",
+        .ident = "Dell i1501",
         .matches = {
                      DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
                      DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1501"),
@@ -318,7 +319,7 @@ static struct dmi_system_id acpi_osi_dmi_table[] __initdata = {
         },
         { /* OSI(Linux) effect unknown */
         .callback = dmi_unknown_osi_linux,
-        .ident = "Dell",
+        .ident = "Dell Latitude D830",
         .matches = {
                      DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
                      DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D830"),
@@ -326,7 +327,7 @@ static struct dmi_system_id acpi_osi_dmi_table[] __initdata = {
         },
         { /* OSI(Linux) effect unknown */
         .callback = dmi_unknown_osi_linux,
-        .ident = "Dell",
+        .ident = "Dell OP GX620",
         .matches = {
                      DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
                      DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex GX620"),
@@ -334,15 +335,23 @@ static struct dmi_system_id acpi_osi_dmi_table[] __initdata = {
         },
         { /* OSI(Linux) effect unknown */
         .callback = dmi_unknown_osi_linux,
-        .ident = "Dell",
+        .ident = "Dell PE 1900",
         .matches = {
                      DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
                      DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 1900"),
                 },
         },
+        { /* OSI(Linux) is a NOP */
+        .callback = dmi_disable_osi_linux,
+        .ident = "Dell PE R200",
+        .matches = {
+                     DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+                     DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge R200"),
+                },
+        },
         { /* OSI(Linux) touches USB */
         .callback = dmi_disable_osi_linux,
-        .ident = "Dell",
+        .ident = "Dell PR 390",
         .matches = {
                      DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
                      DMI_MATCH(DMI_PRODUCT_NAME, "Precision WorkStation 390"),
@@ -358,7 +367,7 @@ static struct dmi_system_id acpi_osi_dmi_table[] __initdata = {
         },
         { /* OSI(Linux) effect unknown */
         .callback = dmi_unknown_osi_linux,
-        .ident = "Dell",
+        .ident = "Dell PE SC440",
         .matches = {
                      DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
                      DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge SC440"),
@@ -474,6 +483,11 @@ static struct dmi_system_id acpi_osi_dmi_table[] __initdata = {
          *
          * _OSI(Linux) confirmed to be a NOP:
          * DMI_MATCH(DMI_PRODUCT_NAME, "P1-J150B"),
+         * with DMI_MATCH(DMI_BOARD_NAME, "ROCKY"),
+         *
+         * unknown:
+         * DMI_MATCH(DMI_PRODUCT_NAME, "S1-MDGDG"),
+         * with DMI_MATCH(DMI_BOARD_NAME, "ROCKY"),
          */
         {
         .callback = dmi_disable_osi_linux,
@@ -516,7 +530,7 @@ static struct dmi_system_id acpi_osi_dmi_table[] __initdata = {
          * DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FZ11M"),
          */
         {
-        .callback = dmi_unknown_osi_linux,
+        .callback = dmi_disable_osi_linux,
         .ident = "Sony",
         .matches = {
                      DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 1b4cf984b081..8df325dafe0f 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -122,6 +122,31 @@ int acpi_bus_get_status(struct acpi_device *device)
 
 EXPORT_SYMBOL(acpi_bus_get_status);
 
+void acpi_bus_private_data_handler(acpi_handle handle,
+                                   u32 function, void *context)
+{
+        return;
+}
+EXPORT_SYMBOL(acpi_bus_private_data_handler);
+
+int acpi_bus_get_private_data(acpi_handle handle, void **data)
+{
+        acpi_status status = AE_OK;
+
+        if (!*data)
+                return -EINVAL;
+
+        status = acpi_get_data(handle, acpi_bus_private_data_handler, data);
+        if (ACPI_FAILURE(status) || !*data) {
+                ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n",
+                                handle));
+                return -ENODEV;
+        }
+
+        return 0;
+}
+EXPORT_SYMBOL(acpi_bus_get_private_data);
+
 /* --------------------------------------------------------------------------
                                  Power Management
    -------------------------------------------------------------------------- */
diff --git a/drivers/acpi/debug.c b/drivers/acpi/debug.c
index bf513e07b773..6df564f4ca6e 100644
--- a/drivers/acpi/debug.c
+++ b/drivers/acpi/debug.c
@@ -130,6 +130,63 @@ static int param_get_debug_level(char *buffer, struct kernel_param *kp) {
 module_param_call(debug_layer, param_set_uint, param_get_debug_layer, &acpi_dbg_layer, 0644);
 module_param_call(debug_level, param_set_uint, param_get_debug_level, &acpi_dbg_level, 0644);
 
+static char trace_method_name[6];
+module_param_string(trace_method_name, trace_method_name, 6, 0644);
+static unsigned int trace_debug_layer;
+module_param(trace_debug_layer, uint, 0644);
+static unsigned int trace_debug_level;
+module_param(trace_debug_level, uint, 0644);
+
+static int param_set_trace_state(const char *val, struct kernel_param *kp)
+{
+        int result = 0;
+
+        if (!strncmp(val, "enable", strlen("enable") - 1)) {
+                result = acpi_debug_trace(trace_method_name, trace_debug_level,
+                                          trace_debug_layer, 0);
+                if (result)
+                        result = -EBUSY;
+                goto exit;
+        }
+
+        if (!strncmp(val, "disable", strlen("disable") - 1)) {
+                int name = 0;
+                result = acpi_debug_trace((char *)&name, trace_debug_level,
+                                          trace_debug_layer, 0);
+                if (result)
+                        result = -EBUSY;
+                goto exit;
+        }
+
+        if (!strncmp(val, "1", 1)) {
+                result = acpi_debug_trace(trace_method_name, trace_debug_level,
+                                          trace_debug_layer, 1);
+                if (result)
+                        result = -EBUSY;
+                goto exit;
+        }
+
+        result = -EINVAL;
+exit:
+        return result;
+}
+
+static int param_get_trace_state(char *buffer, struct kernel_param *kp)
+{
+        if (!acpi_gbl_trace_method_name)
+                return sprintf(buffer, "disable");
+        else {
+                if (acpi_gbl_trace_flags & 1)
+                        return sprintf(buffer, "1");
+                else
+                        return sprintf(buffer, "enable");
+        }
+        return 0;
+}
+
+module_param_call(trace_state, param_set_trace_state, param_get_trace_state,
+                  NULL, 0644);
+
 /* --------------------------------------------------------------------------
                               FS Interface (/proc)
    -------------------------------------------------------------------------- */
diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c
index 1dabdf4c07b3..b3dec2101e2e 100644
--- a/drivers/acpi/dock.c
+++ b/drivers/acpi/dock.c
@@ -51,6 +51,12 @@ static struct atomic_notifier_head dock_notifier_list;
 static struct platform_device *dock_device;
 static char dock_device_name[] = "dock";
 
+static const struct acpi_device_id dock_device_ids[] = {
+        {"LNXDOCK", 0},
+        {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, dock_device_ids);
+
 struct dock_station {
         acpi_handle handle;
         unsigned long last_dock_time;
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 987b967c7467..7222a18a0319 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -573,7 +573,7 @@ acpi_ec_space_handler(u32 function, acpi_physical_address address,
                       void *handler_context, void *region_context)
 {
         struct acpi_ec *ec = handler_context;
-        int result = 0, i = 0;
+        int result = 0, i;
         u8 temp = 0;
 
         if ((address > 0xFF) || !value || !handler_context)
@@ -585,7 +585,18 @@ acpi_ec_space_handler(u32 function, acpi_physical_address address,
         if (bits != 8 && acpi_strict)
                 return AE_BAD_PARAMETER;
 
-        while (bits - i > 0) {
+        acpi_ec_burst_enable(ec);
+
+        if (function == ACPI_READ) {
+                result = acpi_ec_read(ec, address, &temp);
+                *value = temp;
+        } else {
+                temp = 0xff & (*value);
+                result = acpi_ec_write(ec, address, temp);
+        }
+
+        for (i = 8; unlikely(bits - i > 0); i += 8) {
+                ++address;
                 if (function == ACPI_READ) {
                         result = acpi_ec_read(ec, address, &temp);
                         (*value) |= ((acpi_integer)temp) << i;
@@ -593,10 +604,10 @@ acpi_ec_space_handler(u32 function, acpi_physical_address address,
                         temp = 0xff & ((*value) >> i);
                         result = acpi_ec_write(ec, address, temp);
                 }
-                i += 8;
-                ++address;
         }
 
+        acpi_ec_burst_disable(ec);
+
         switch (result) {
         case -EINVAL:
                 return AE_BAD_PARAMETER;
diff --git a/drivers/acpi/event.c b/drivers/acpi/event.c
index 5c95863f8fa9..5479dc0eeeec 100644
--- a/drivers/acpi/event.c
+++ b/drivers/acpi/event.c
@@ -109,6 +109,34 @@ static const struct file_operations acpi_system_event_ops = {
 };
 #endif  /* CONFIG_ACPI_PROC_EVENT */
 
+/* ACPI notifier chain */
+BLOCKING_NOTIFIER_HEAD(acpi_chain_head);
+
+int acpi_notifier_call_chain(struct acpi_device *dev, u32 type, u32 data)
+{
+        struct acpi_bus_event event;
+
+        strcpy(event.device_class, dev->pnp.device_class);
+        strcpy(event.bus_id, dev->pnp.bus_id);
+        event.type = type;
+        event.data = data;
+        return (blocking_notifier_call_chain(&acpi_chain_head, 0, (void *)&event)
+                        == NOTIFY_BAD) ? -EINVAL : 0;
+}
+EXPORT_SYMBOL(acpi_notifier_call_chain);
+
+int register_acpi_notifier(struct notifier_block *nb)
+{
+        return blocking_notifier_chain_register(&acpi_chain_head, nb);
+}
+EXPORT_SYMBOL(register_acpi_notifier);
+
+int unregister_acpi_notifier(struct notifier_block *nb)
+{
+        return blocking_notifier_chain_unregister(&acpi_chain_head, nb);
+}
+EXPORT_SYMBOL(unregister_acpi_notifier);
+
 #ifdef CONFIG_NET
 static unsigned int acpi_event_seqnum;
 struct acpi_genl_event {
diff --git a/drivers/acpi/events/evevent.c b/drivers/acpi/events/evevent.c
index e41287815ea1..3048801a37b5 100644
--- a/drivers/acpi/events/evevent.c
+++ b/drivers/acpi/events/evevent.c
@@ -259,7 +259,7 @@ u32 acpi_ev_fixed_event_detect(void)
                         enable_bit_mask)) {
 
                         /* Found an active (signalled) event */
-
+                        acpi_os_fixed_event_count(i);
                         int_status |= acpi_ev_fixed_event_dispatch((u32) i);
                 }
         }
diff --git a/drivers/acpi/events/evgpe.c b/drivers/acpi/events/evgpe.c
index e22f4a973c0f..0dadd2adc800 100644
--- a/drivers/acpi/events/evgpe.c
+++ b/drivers/acpi/events/evgpe.c
@@ -270,18 +270,18 @@ acpi_status acpi_ev_disable_gpe(struct acpi_gpe_event_info *gpe_event_info)
         case ACPI_GPE_TYPE_WAKE_RUN:
                 ACPI_CLEAR_BIT(gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED);
 
-                /*lint -fallthrough */
+                /* fallthrough */
 
         case ACPI_GPE_TYPE_RUNTIME:
 
                 /* Disable the requested runtime GPE */
 
                 ACPI_CLEAR_BIT(gpe_event_info->flags, ACPI_GPE_RUN_ENABLED);
-                status = acpi_hw_write_gpe_enable_reg(gpe_event_info);
-                break;
+
+                /* fallthrough */
 
         default:
-                return_ACPI_STATUS(AE_BAD_PARAMETER);
+                acpi_hw_write_gpe_enable_reg(gpe_event_info);
         }
 
         return_ACPI_STATUS(AE_OK);
@@ -501,6 +501,7 @@ u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info * gpe_xrupt_list)
  *              an interrupt handler.
  *
  ******************************************************************************/
+static void acpi_ev_asynch_enable_gpe(void *context);
 
 static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context)
 {
@@ -576,22 +577,30 @@ static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context)
                                          method_node)));
                 }
         }
+        /* Defer enabling of GPE until all notify handlers are done */
+        acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_ev_asynch_enable_gpe,
+                                gpe_event_info);
+        return_VOID;
+}
 
-        if ((local_gpe_event_info.flags & ACPI_GPE_XRUPT_TYPE_MASK) ==
+static void acpi_ev_asynch_enable_gpe(void *context)
+{
+        struct acpi_gpe_event_info *gpe_event_info = context;
+        acpi_status status;
+        if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) ==
             ACPI_GPE_LEVEL_TRIGGERED) {
                 /*
                  * GPE is level-triggered, we clear the GPE status bit after
                  * handling the event.
                  */
-                status = acpi_hw_clear_gpe(&local_gpe_event_info);
+                status = acpi_hw_clear_gpe(gpe_event_info);
                 if (ACPI_FAILURE(status)) {
                         return_VOID;
                 }
         }
 
         /* Enable this GPE */
-
-        (void)acpi_hw_write_gpe_enable_reg(&local_gpe_event_info);
+        (void)acpi_hw_write_gpe_enable_reg(gpe_event_info);
         return_VOID;
 }
 
@@ -618,7 +627,7 @@ acpi_ev_gpe_dispatch(struct acpi_gpe_event_info *gpe_event_info, u32 gpe_number)
 
         ACPI_FUNCTION_TRACE(ev_gpe_dispatch);
 
-        acpi_gpe_count++;
+        acpi_os_gpe_count(gpe_number);
 
         /*
          * If edge-triggered, clear the GPE status bit now.  Note that
diff --git a/drivers/acpi/fan.c b/drivers/acpi/fan.c
index a6e149d692cb..48cb705b274a 100644
--- a/drivers/acpi/fan.c
+++ b/drivers/acpi/fan.c
@@ -30,7 +30,7 @@
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
 #include <asm/uaccess.h>
-
+#include <linux/thermal.h>
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi_drivers.h>
 
@@ -68,9 +68,55 @@ static struct acpi_driver acpi_fan_driver = {
                 },
 };
 
+/* thermal cooling device callbacks */
+static int fan_get_max_state(struct thermal_cooling_device *cdev, char *buf)
+{
+        /* ACPI fan device only support two states: ON/OFF */
+        return sprintf(buf, "1\n");
+}
+
+static int fan_get_cur_state(struct thermal_cooling_device *cdev, char *buf)
+{
+        struct acpi_device *device = cdev->devdata;
+        int state;
+        int result;
+
+        if (!device)
+                return -EINVAL;
+
+        result = acpi_bus_get_power(device->handle, &state);
+        if (result)
+                return result;
+
+        return sprintf(buf, "%s\n", state == ACPI_STATE_D3 ? "0" :
+                         (state == ACPI_STATE_D0 ? "1" : "unknown"));
+}
+
+static int
+fan_set_cur_state(struct thermal_cooling_device *cdev, unsigned int state)
+{
+        struct acpi_device *device = cdev->devdata;
+        int result;
+
+        if (!device || (state != 0 && state != 1))
+                return -EINVAL;
+
+        result = acpi_bus_set_power(device->handle,
+                                state ? ACPI_STATE_D0 : ACPI_STATE_D3);
+
+        return result;
+}
+
+static struct thermal_cooling_device_ops fan_cooling_ops = {
+        .get_max_state = fan_get_max_state,
+        .get_cur_state = fan_get_cur_state,
+        .set_cur_state = fan_set_cur_state,
+};
+
 /* --------------------------------------------------------------------------
                               FS Interface (/proc)
    -------------------------------------------------------------------------- */
+#ifdef CONFIG_ACPI_PROCFS
 
 static struct proc_dir_entry *acpi_fan_dir;
 
@@ -171,7 +217,17 @@ static int acpi_fan_remove_fs(struct acpi_device *device)
 
         return 0;
 }
+#else
+static int acpi_fan_add_fs(struct acpi_device *device)
+{
+        return 0;
+}
 
+static int acpi_fan_remove_fs(struct acpi_device *device)
+{
+        return 0;
+}
+#endif
 /* --------------------------------------------------------------------------
                                  Driver Interface
    -------------------------------------------------------------------------- */
@@ -179,9 +235,8 @@ static int acpi_fan_remove_fs(struct acpi_device *device)
 static int acpi_fan_add(struct acpi_device *device)
 {
         int result = 0;
-        struct acpi_fan *fan = NULL;
         int state = 0;
-
+        struct thermal_cooling_device *cdev;
 
         if (!device)
                 return -EINVAL;
@@ -199,6 +254,25 @@ static int acpi_fan_add(struct acpi_device *device)
         acpi_bus_set_power(device->handle, state);
         device->flags.force_power_state = 0;
 
+        cdev = thermal_cooling_device_register("Fan", device,
+                                                &fan_cooling_ops);
+        if (cdev)
+                printk(KERN_INFO PREFIX
+                        "%s is registered as cooling_device%d\n",
+                        device->dev.bus_id, cdev->id);
+        else
+                goto end;
+        acpi_driver_data(device) = cdev;
+        result = sysfs_create_link(&device->dev.kobj, &cdev->device.kobj,
+                                        "thermal_cooling");
+        if (result)
+                return result;
+
+        result = sysfs_create_link(&cdev->device.kobj, &device->dev.kobj,
+                                       "device");
+        if (result)
+                return result;
+
         result = acpi_fan_add_fs(device);
         if (result)
                 goto end;
@@ -208,18 +282,20 @@ static int acpi_fan_add(struct acpi_device *device)
                !device->power.state ? "on" : "off");
 
       end:
-        if (result)
-                kfree(fan);
-
         return result;
 }
 
 static int acpi_fan_remove(struct acpi_device *device, int type)
 {
-        if (!device || !acpi_driver_data(device))
+        struct thermal_cooling_device *cdev = acpi_driver_data(device);
+
+        if (!device || !cdev)
                 return -EINVAL;
 
         acpi_fan_remove_fs(device);
+        sysfs_remove_link(&device->dev.kobj, "thermal_cooling");
+        sysfs_remove_link(&cdev->device.kobj, "device");
+        thermal_cooling_device_unregister(cdev);
 
         return 0;
 }
@@ -261,10 +337,12 @@ static int __init acpi_fan_init(void)
         int result = 0;
 
 
+#ifdef CONFIG_ACPI_PROCFS
         acpi_fan_dir = proc_mkdir(ACPI_FAN_CLASS, acpi_root_dir);
         if (!acpi_fan_dir)
                 return -ENODEV;
         acpi_fan_dir->owner = THIS_MODULE;
+#endif
 
         result = acpi_bus_register_driver(&acpi_fan_driver);
         if (result < 0) {
diff --git a/drivers/acpi/hardware/hwsleep.c b/drivers/acpi/hardware/hwsleep.c
index fd1c4ba63367..058d0be5cbe2 100644
--- a/drivers/acpi/hardware/hwsleep.c
+++ b/drivers/acpi/hardware/hwsleep.c
@@ -286,13 +286,13 @@ acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state)
         }
 
         /*
+         * 1) Disable/Clear all GPEs
          * 2) Enable all wakeup GPEs
          */
         status = acpi_hw_disable_all_gpes();
         if (ACPI_FAILURE(status)) {
                 return_ACPI_STATUS(status);
         }
-
         acpi_gbl_system_awake_and_running = FALSE;
 
         status = acpi_hw_enable_all_wakeup_gpes();
diff --git a/drivers/acpi/namespace/nsxfeval.c b/drivers/acpi/namespace/nsxfeval.c
index f39fbc6b9237..b92133faf5b7 100644
--- a/drivers/acpi/namespace/nsxfeval.c
+++ b/drivers/acpi/namespace/nsxfeval.c
@@ -443,6 +443,7 @@ acpi_ns_get_device_callback(acpi_handle obj_handle,
         struct acpica_device_id hid;
         struct acpi_compatible_id_list *cid;
         acpi_native_uint i;
+        int found;
 
         status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
         if (ACPI_FAILURE(status)) {
@@ -496,16 +497,19 @@ acpi_ns_get_device_callback(acpi_handle obj_handle,
 
                         /* Walk the CID list */
 
+                        found = 0;
                         for (i = 0; i < cid->count; i++) {
                                 if (ACPI_STRNCMP(cid->id[i].value, info->hid,
                                                  sizeof(struct
-                                                        acpi_compatible_id)) !=
+                                                        acpi_compatible_id)) ==
                                     0) {
-                                        ACPI_FREE(cid);
-                                        return (AE_OK);
+                                        found = 1;
+                                        break;
                                 }
                         }
                         ACPI_FREE(cid);
+                        if (!found)
+                                return (AE_OK);
                 }
         }
 
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index bc1604bfa4db..6f49f6437289 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -134,7 +134,7 @@ static char osi_additional_string[OSI_STRING_LENGTH_MAX];
  */
 #define OSI_LINUX_ENABLE 0
 
-struct osi_linux {
+static struct osi_linux {
         unsigned int    enable:1;
         unsigned int    dmi:1;
         unsigned int    cmdline:1;
@@ -264,11 +264,16 @@ acpi_physical_address __init acpi_os_get_root_pointer(void)
                                "System description tables not found\n");
                         return 0;
                 }
-        } else
-                return acpi_find_rsdp();
+        } else {
+                acpi_physical_address pa = 0;
+
+                acpi_find_root_pointer(&pa);
+                return pa;
+        }
 }
 
-void __iomem *acpi_os_map_memory(acpi_physical_address phys, acpi_size size)
+void __iomem *__init_refok
+acpi_os_map_memory(acpi_physical_address phys, acpi_size size)
 {
         if (phys > ULONG_MAX) {
                 printk(KERN_ERR PREFIX "Cannot map memory that high\n");
@@ -346,7 +351,15 @@ acpi_os_table_override(struct acpi_table_header * existing_table,
 
 static irqreturn_t acpi_irq(int irq, void *dev_id)
 {
-        return (*acpi_irq_handler) (acpi_irq_context) ? IRQ_HANDLED : IRQ_NONE;
+        u32 handled;
+
+        handled = (*acpi_irq_handler) (acpi_irq_context);
+
+        if (handled) {
+                acpi_irq_handled++;
+                return IRQ_HANDLED;
+        } else
+                return IRQ_NONE;
 }
 
 acpi_status
@@ -355,6 +368,8 @@ acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler,
 {
         unsigned int irq;
 
+        acpi_irq_stats_init();
+
         /*
          * Ignore the GSI from the core, and use the value in our copy of the
          * FADT. It may not be the same if an interrupt source override exists
@@ -675,25 +690,6 @@ static void acpi_os_execute_deferred(struct work_struct *work)
         dpc->function(dpc->context);
         kfree(dpc);
 
-        /* Yield cpu to notify thread */
-        cond_resched();
-
-        return;
-}
-
-static void acpi_os_execute_notify(struct work_struct *work)
-{
-        struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work);
-
-        if (!dpc) {
-                printk(KERN_ERR PREFIX "Invalid (NULL) context\n");
-                return;
-        }
-
-        dpc->function(dpc->context);
-
-        kfree(dpc);
-
         return;
 }
 
@@ -717,7 +713,7 @@ acpi_status acpi_os_execute(acpi_execute_type type,
 {
         acpi_status status = AE_OK;
         struct acpi_os_dpc *dpc;
-
+        struct workqueue_struct *queue;
         ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
                           "Scheduling function [%p(%p)] for deferred execution.\n",
                           function, context));
@@ -741,20 +737,13 @@ acpi_status acpi_os_execute(acpi_execute_type type,
         dpc->function = function;
         dpc->context = context;
 
-        if (type == OSL_NOTIFY_HANDLER) {
-                INIT_WORK(&dpc->work, acpi_os_execute_notify);
-                if (!queue_work(kacpi_notify_wq, &dpc->work)) {
-                        status = AE_ERROR;
-                        kfree(dpc);
-                }
-        } else {
-                INIT_WORK(&dpc->work, acpi_os_execute_deferred);
-                if (!queue_work(kacpid_wq, &dpc->work)) {
-                        ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
-                                  "Call to queue_work() failed.\n"));
-                        status = AE_ERROR;
-                        kfree(dpc);
-                }
+        INIT_WORK(&dpc->work, acpi_os_execute_deferred);
+        queue = (type == OSL_NOTIFY_HANDLER) ? kacpi_notify_wq : kacpid_wq;
+        if (!queue_work(queue, &dpc->work)) {
+                ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+                          "Call to queue_work() failed.\n"));
+                status = AE_ERROR;
+                kfree(dpc);
         }
         return_ACPI_STATUS(status);
 }
@@ -1349,24 +1338,24 @@ acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object)
  *
  *      Returns 0 on success
  */
-int acpi_dmi_dump(void)
+static int acpi_dmi_dump(void)
 {
 
         if (!dmi_available)
                 return -1;
 
         printk(KERN_NOTICE PREFIX "DMI System Vendor: %s\n",
-                dmi_get_slot(DMI_SYS_VENDOR));
+                dmi_get_system_info(DMI_SYS_VENDOR));
         printk(KERN_NOTICE PREFIX "DMI Product Name: %s\n",
-                dmi_get_slot(DMI_PRODUCT_NAME));
+                dmi_get_system_info(DMI_PRODUCT_NAME));
         printk(KERN_NOTICE PREFIX "DMI Product Version: %s\n",
-                dmi_get_slot(DMI_PRODUCT_VERSION));
+                dmi_get_system_info(DMI_PRODUCT_VERSION));
         printk(KERN_NOTICE PREFIX "DMI Board Name: %s\n",
-                dmi_get_slot(DMI_BOARD_NAME));
+                dmi_get_system_info(DMI_BOARD_NAME));
         printk(KERN_NOTICE PREFIX "DMI BIOS Vendor: %s\n",
-                dmi_get_slot(DMI_BIOS_VENDOR));
+                dmi_get_system_info(DMI_BIOS_VENDOR));
         printk(KERN_NOTICE PREFIX "DMI BIOS Date: %s\n",
-                dmi_get_slot(DMI_BIOS_DATE));
+                dmi_get_system_info(DMI_BIOS_DATE));
 
         return 0;
 }
diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c
index 62010c2481b3..76d9c669d2d8 100644
--- a/drivers/acpi/pci_irq.c
+++ b/drivers/acpi/pci_irq.c
@@ -51,10 +51,8 @@ static struct acpi_prt_entry *acpi_pci_irq_find_prt_entry(int segment,
                                                           int bus,
                                                           int device, int pin)
 {
-        struct list_head *node = NULL;
         struct acpi_prt_entry *entry = NULL;
 
-
         if (!acpi_prt.count)
                 return NULL;
 
@@ -64,8 +62,7 @@ static struct acpi_prt_entry *acpi_pci_irq_find_prt_entry(int segment,
          *
          */
         spin_lock(&acpi_prt_lock);
-        list_for_each(node, &acpi_prt.entries) {
-                entry = list_entry(node, struct acpi_prt_entry, node);
+        list_for_each_entry(entry, &acpi_prt.entries, node) {
                 if ((segment == entry->id.segment)
                     && (bus == entry->id.bus)
                     && (device == entry->id.device)
diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c
index af1769a20c7a..76bf6d90c700 100644
--- a/drivers/acpi/power.c
+++ b/drivers/acpi/power.c
@@ -458,11 +458,9 @@ int acpi_power_transition(struct acpi_device *device, int state)
         }
 
      end:
-        if (result) {
+        if (result)
                 device->power.state = ACPI_STATE_UNKNOWN;
-                printk(KERN_WARNING PREFIX "Transitioning device [%s] to D%d\n",
-                              device->pnp.bus_id, state);
-        } else {
+        else {
         /* We shouldn't change the state till all above operations succeed */
                 device->power.state = state;
         }
diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index e48ee4f8749f..75ccf5d18bf4 100644
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -668,6 +668,24 @@ static int __cpuinit acpi_processor_start(struct acpi_device *device)
 
         acpi_processor_power_init(pr, device);
 
+        pr->cdev = thermal_cooling_device_register("Processor", device,
+                                                &processor_cooling_ops);
+        if (pr->cdev)
+                printk(KERN_INFO PREFIX
+                        "%s is registered as cooling_device%d\n",
+                        device->dev.bus_id, pr->cdev->id);
+        else
+                goto end;
+
+        result = sysfs_create_link(&device->dev.kobj, &pr->cdev->device.kobj,
+                                        "thermal_cooling");
+        if (result)
+                return result;
+        result = sysfs_create_link(&pr->cdev->device.kobj, &device->dev.kobj,
+                                        "device");
+        if (result)
+                return result;
+
         if (pr->flags.throttling) {
                 printk(KERN_INFO PREFIX "%s [%s] (supports",
                        acpi_device_name(device), acpi_device_bid(device));
@@ -791,6 +809,11 @@ static int acpi_processor_remove(struct acpi_device *device, int type)
 
         acpi_processor_remove_fs(device);
 
+        sysfs_remove_link(&device->dev.kobj, "thermal_cooling");
+        sysfs_remove_link(&pr->cdev->device.kobj, "device");
+        thermal_cooling_device_unregister(pr->cdev);
+        pr->cdev = NULL;
+
         processors[pr->id] = NULL;
 
         kfree(pr);
@@ -812,11 +835,18 @@ static int is_processor_present(acpi_handle handle)
 
 
         status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);
-        if (ACPI_FAILURE(status) || !(sta & ACPI_STA_DEVICE_PRESENT)) {
-                ACPI_EXCEPTION((AE_INFO, status, "Processor Device is not present"));
-                return 0;
-        }
-        return 1;
+        /*
+         * if a processor object does not have an _STA object,
+         * OSPM assumes that the processor is present.
+         */
+        if (status == AE_NOT_FOUND)
+                return 1;
+
+        if (ACPI_SUCCESS(status) && (sta & ACPI_STA_DEVICE_PRESENT))
+                return 1;
+
+        ACPI_EXCEPTION((AE_INFO, status, "Processor Device is not present"));
+        return 0;
 }
 
 static
@@ -1061,6 +1091,8 @@ static int __init acpi_processor_init(void)
 
         acpi_processor_ppc_init();
 
+        acpi_processor_throttling_init();
+
         return 0;
 
 out_cpuidle:
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 199ea2146153..32003fdc91e8 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -98,6 +98,9 @@ module_param(bm_history, uint, 0644);
 
 static int acpi_processor_set_power_policy(struct acpi_processor *pr);
 
+#else   /* CONFIG_CPU_IDLE */
+static unsigned int latency_factor __read_mostly = 2;
+module_param(latency_factor, uint, 0644);
 #endif
 
 /*
@@ -201,6 +204,10 @@ static inline u32 ticks_elapsed_in_us(u32 t1, u32 t2)
                 return PM_TIMER_TICKS_TO_US((0xFFFFFFFF - t1) + t2);
 }
 
+/*
+ * Callers should disable interrupts before the call and enable
+ * interrupts after return.
+ */
 static void acpi_safe_halt(void)
 {
         current_thread_info()->status &= ~TS_POLLING;
@@ -261,7 +268,7 @@ static atomic_t c3_cpu_count;
 /* Common C-state entry for C2, C3, .. */
 static void acpi_cstate_enter(struct acpi_processor_cx *cstate)
 {
-        if (cstate->space_id == ACPI_CSTATE_FFH) {
+        if (cstate->entry_method == ACPI_CSTATE_FFH) {
                 /* Call into architectural FFH based C-state */
                 acpi_processor_ffh_cstate_enter(cstate);
         } else {
@@ -413,6 +420,8 @@ static void acpi_processor_idle(void)
                         pm_idle_save();
                 else
                         acpi_safe_halt();
+
+                local_irq_enable();
                 return;
         }
 
@@ -521,6 +530,7 @@ static void acpi_processor_idle(void)
                  *       skew otherwise.
                  */
                 sleep_ticks = 0xFFFFFFFF;
+                local_irq_enable();
                 break;
 
         case ACPI_STATE_C2:
@@ -922,20 +932,20 @@ static int acpi_processor_get_power_info_cst(struct acpi_processor *pr)
                 cx.address = reg->address;
                 cx.index = current_count + 1;
 
-                cx.space_id = ACPI_CSTATE_SYSTEMIO;
+                cx.entry_method = ACPI_CSTATE_SYSTEMIO;
                 if (reg->space_id == ACPI_ADR_SPACE_FIXED_HARDWARE) {
                         if (acpi_processor_ffh_cstate_probe
                                         (pr->id, &cx, reg) == 0) {
-                                cx.space_id = ACPI_CSTATE_FFH;
-                        } else if (cx.type != ACPI_STATE_C1) {
+                                cx.entry_method = ACPI_CSTATE_FFH;
+                        } else if (cx.type == ACPI_STATE_C1) {
                                 /*
                                  * C1 is a special case where FIXED_HARDWARE
                                  * can be handled in non-MWAIT way as well.
                                  * In that case, save this _CST entry info.
-                                 * That is, we retain space_id of SYSTEM_IO for
-                                 * halt based C1.
                                  * Otherwise, ignore this info and continue.
                                  */
+                                cx.entry_method = ACPI_CSTATE_HALT;
+                        } else {
                                 continue;
                         }
                 }
@@ -1369,12 +1379,16 @@ static inline void acpi_idle_update_bm_rld(struct acpi_processor *pr,
 /**
  * acpi_idle_do_entry - a helper function that does C2 and C3 type entry
  * @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)
 {
-        if (cx->space_id == ACPI_CSTATE_FFH) {
+        if (cx->entry_method == ACPI_CSTATE_FFH) {
                 /* Call into architectural FFH based C-state */
                 acpi_processor_ffh_cstate_enter(cx);
+        } else if (cx->entry_method == ACPI_CSTATE_HALT) {
+                acpi_safe_halt();
         } else {
                 int unused;
                 /* IO port based C-state */
@@ -1396,21 +1410,27 @@ static inline void acpi_idle_do_entry(struct acpi_processor_cx *cx)
 static int acpi_idle_enter_c1(struct cpuidle_device *dev,
                               struct cpuidle_state *state)
 {
+        u32 t1, t2;
         struct acpi_processor *pr;
         struct acpi_processor_cx *cx = cpuidle_get_statedata(state);
+
         pr = processors[smp_processor_id()];
 
         if (unlikely(!pr))
                 return 0;
 
+        local_irq_disable();
         if (pr->flags.bm_check)
                 acpi_idle_update_bm_rld(pr, cx);
 
-        acpi_safe_halt();
+        t1 = inl(acpi_gbl_FADT.xpm_timer_block.address);
+        acpi_idle_do_entry(cx);
+        t2 = inl(acpi_gbl_FADT.xpm_timer_block.address);
 
+        local_irq_enable();
         cx->usage++;
 
-        return 0;
+        return ticks_elapsed_in_us(t1, t2);
 }
 
 /**
@@ -1517,7 +1537,9 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
                 if (dev->safe_state) {
                         return dev->safe_state->enter(dev, dev->safe_state);
                 } else {
+                        local_irq_disable();
                         acpi_safe_halt();
+                        local_irq_enable();
                         return 0;
                 }
         }
@@ -1609,7 +1631,7 @@ struct cpuidle_driver acpi_idle_driver = {
  */
 static int acpi_processor_setup_cpuidle(struct acpi_processor *pr)
 {
-        int i, count = 0;
+        int i, count = CPUIDLE_DRIVER_STATE_START;
         struct acpi_processor_cx *cx;
         struct cpuidle_state *state;
         struct cpuidle_device *dev = &pr->power.dev;
@@ -1638,13 +1660,14 @@ static int acpi_processor_setup_cpuidle(struct acpi_processor *pr)
 
                 snprintf(state->name, CPUIDLE_NAME_LEN, "C%d", i);
                 state->exit_latency = cx->latency;
-                state->target_residency = cx->latency * 6;
+                state->target_residency = cx->latency * latency_factor;
                 state->power_usage = cx->power;
 
                 state->flags = 0;
                 switch (cx->type) {
                         case ACPI_STATE_C1:
                         state->flags |= CPUIDLE_FLAG_SHALLOW;
+                        state->flags |= CPUIDLE_FLAG_TIME_VALID;
                         state->enter = acpi_idle_enter_c1;
                         dev->safe_state = state;
                         break;
@@ -1667,6 +1690,8 @@ static int acpi_processor_setup_cpuidle(struct acpi_processor *pr)
                 }
 
                 count++;
+                if (count == CPUIDLE_STATE_MAX)
+                        break;
         }
 
         dev->state_count = count;
diff --git a/drivers/acpi/processor_perflib.c b/drivers/acpi/processor_perflib.c
index 463b0247cbc5..f32010bee4d5 100644
--- a/drivers/acpi/processor_perflib.c
+++ b/drivers/acpi/processor_perflib.c
@@ -60,6 +60,11 @@ static DEFINE_MUTEX(performance_mutex);
  * policy is adjusted accordingly.
  */
 
+static unsigned int ignore_ppc = 0;
+module_param(ignore_ppc, uint, 0644);
+MODULE_PARM_DESC(ignore_ppc, "If the frequency of your machine gets wrongly" \
+                 "limited by BIOS, this should help");
+
 #define PPC_REGISTERED   1
 #define PPC_IN_USE       2
 
@@ -72,6 +77,9 @@ static int acpi_processor_ppc_notifier(struct notifier_block *nb,
         struct acpi_processor *pr;
         unsigned int ppc = 0;
 
+        if (ignore_ppc)
+                return 0;
+
         mutex_lock(&performance_mutex);
 
         if (event != CPUFREQ_INCOMPATIBLE)
@@ -130,7 +138,13 @@ static int acpi_processor_get_platform_limit(struct acpi_processor *pr)
 
 int acpi_processor_ppc_has_changed(struct acpi_processor *pr)
 {
-        int ret = acpi_processor_get_platform_limit(pr);
+        int ret;
+
+        if (ignore_ppc)
+                return 0;
+
+        ret = acpi_processor_get_platform_limit(pr);
+
         if (ret < 0)
                 return (ret);
         else
diff --git a/drivers/acpi/processor_thermal.c b/drivers/acpi/processor_thermal.c
index 06e6f3fb8825..9cb43f52f7b6 100644
--- a/drivers/acpi/processor_thermal.c
+++ b/drivers/acpi/processor_thermal.c
@@ -32,6 +32,7 @@
 #include <linux/cpufreq.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
+#include <linux/sysdev.h>
 
 #include <asm/uaccess.h>
 
@@ -93,6 +94,9 @@ static int acpi_processor_apply_limit(struct acpi_processor *pr)
  * _any_ cpufreq driver and not only the acpi-cpufreq driver.
  */
 
+#define CPUFREQ_THERMAL_MIN_STEP 0
+#define CPUFREQ_THERMAL_MAX_STEP 3
+
 static unsigned int cpufreq_thermal_reduction_pctg[NR_CPUS];
 static unsigned int acpi_thermal_cpufreq_is_init = 0;
 
@@ -109,8 +113,9 @@ static int acpi_thermal_cpufreq_increase(unsigned int cpu)
         if (!cpu_has_cpufreq(cpu))
                 return -ENODEV;
 
-        if (cpufreq_thermal_reduction_pctg[cpu] < 60) {
-                cpufreq_thermal_reduction_pctg[cpu] += 20;
+        if (cpufreq_thermal_reduction_pctg[cpu] <
+                CPUFREQ_THERMAL_MAX_STEP) {
+                cpufreq_thermal_reduction_pctg[cpu]++;
                 cpufreq_update_policy(cpu);
                 return 0;
         }
@@ -123,8 +128,9 @@ static int acpi_thermal_cpufreq_decrease(unsigned int cpu)
         if (!cpu_has_cpufreq(cpu))
                 return -ENODEV;
 
-        if (cpufreq_thermal_reduction_pctg[cpu] > 20)
-                cpufreq_thermal_reduction_pctg[cpu] -= 20;
+        if (cpufreq_thermal_reduction_pctg[cpu] >
+                (CPUFREQ_THERMAL_MIN_STEP + 1))
+                cpufreq_thermal_reduction_pctg[cpu]--;
         else
                 cpufreq_thermal_reduction_pctg[cpu] = 0;
         cpufreq_update_policy(cpu);
@@ -143,7 +149,7 @@ static int acpi_thermal_cpufreq_notifier(struct notifier_block *nb,
 
         max_freq =
             (policy->cpuinfo.max_freq *
-             (100 - cpufreq_thermal_reduction_pctg[policy->cpu])) / 100;
+             (100 - cpufreq_thermal_reduction_pctg[policy->cpu] * 20)) / 100;
 
         cpufreq_verify_within_limits(policy, 0, max_freq);
 
@@ -155,6 +161,32 @@ static struct notifier_block acpi_thermal_cpufreq_notifier_block = {
         .notifier_call = acpi_thermal_cpufreq_notifier,
 };
 
+static int cpufreq_get_max_state(unsigned int cpu)
+{
+        if (!cpu_has_cpufreq(cpu))
+                return 0;
+
+        return CPUFREQ_THERMAL_MAX_STEP;
+}
+
+static int cpufreq_get_cur_state(unsigned int cpu)
+{
+        if (!cpu_has_cpufreq(cpu))
+                return 0;
+
+        return cpufreq_thermal_reduction_pctg[cpu];
+}
+
+static int cpufreq_set_cur_state(unsigned int cpu, int state)
+{
+        if (!cpu_has_cpufreq(cpu))
+                return 0;
+
+        cpufreq_thermal_reduction_pctg[cpu] = state;
+        cpufreq_update_policy(cpu);
+        return 0;
+}
+
 void acpi_thermal_cpufreq_init(void)
 {
         int i;
@@ -179,6 +211,20 @@ void acpi_thermal_cpufreq_exit(void)
 }
 
 #else                           /* ! CONFIG_CPU_FREQ */
+static int cpufreq_get_max_state(unsigned int cpu)
+{
+        return 0;
+}
+
+static int cpufreq_get_cur_state(unsigned int cpu)
+{
+        return 0;
+}
+
+static int cpufreq_set_cur_state(unsigned int cpu, int state)
+{
+        return 0;
+}
 
 static int acpi_thermal_cpufreq_increase(unsigned int cpu)
 {
@@ -310,6 +356,84 @@ int acpi_processor_get_limit_info(struct acpi_processor *pr)
         return 0;
 }
 
+/* thermal coolign device callbacks */
+static int acpi_processor_max_state(struct acpi_processor *pr)
+{
+        int max_state = 0;
+
+        /*
+         * There exists four states according to
+         * cpufreq_thermal_reduction_ptg. 0, 1, 2, 3
+         */
+        max_state += cpufreq_get_max_state(pr->id);
+        if (pr->flags.throttling)
+                max_state += (pr->throttling.state_count -1);
+
+        return max_state;
+}
+static int
+processor_get_max_state(struct thermal_cooling_device *cdev, char *buf)
+{
+        struct acpi_device *device = cdev->devdata;
+        struct acpi_processor *pr = acpi_driver_data(device);
+
+        if (!device || !pr)
+                return -EINVAL;
+
+        return sprintf(buf, "%d\n", acpi_processor_max_state(pr));
+}
+
+static int
+processor_get_cur_state(struct thermal_cooling_device *cdev, char *buf)
+{
+        struct acpi_device *device = cdev->devdata;
+        struct acpi_processor *pr = acpi_driver_data(device);
+        int cur_state;
+
+        if (!device || !pr)
+                return -EINVAL;
+
+        cur_state = cpufreq_get_cur_state(pr->id);
+        if (pr->flags.throttling)
+                cur_state += pr->throttling.state;
+
+        return sprintf(buf, "%d\n", cur_state);
+}
+
+static int
+processor_set_cur_state(struct thermal_cooling_device *cdev, unsigned int state)
+{
+        struct acpi_device *device = cdev->devdata;
+        struct acpi_processor *pr = acpi_driver_data(device);
+        int result = 0;
+        int max_pstate;
+
+        if (!device || !pr)
+                return -EINVAL;
+
+        max_pstate = cpufreq_get_max_state(pr->id);
+
+        if (state > acpi_processor_max_state(pr))
+                return -EINVAL;
+
+        if (state <= max_pstate) {
+                if (pr->flags.throttling && pr->throttling.state)
+                        result = acpi_processor_set_throttling(pr, 0);
+                cpufreq_set_cur_state(pr->id, state);
+        } else {
+                cpufreq_set_cur_state(pr->id, max_pstate);
+                result = acpi_processor_set_throttling(pr,
+                                state - max_pstate);
+        }
+        return result;
+}
+
+struct thermal_cooling_device_ops processor_cooling_ops = {
+        .get_max_state = processor_get_max_state,
+        .get_cur_state = processor_get_cur_state,
+        .set_cur_state = processor_set_cur_state,
+};
+
 /* /proc interface */
 
 static int acpi_processor_limit_seq_show(struct seq_file *seq, void *offset)
diff --git a/drivers/acpi/processor_throttling.c b/drivers/acpi/processor_throttling.c
index 1685b40abda7..1b8e592a8241 100644
--- a/drivers/acpi/processor_throttling.c
+++ b/drivers/acpi/processor_throttling.c
@@ -45,9 +45,229 @@
 #define _COMPONENT              ACPI_PROCESSOR_COMPONENT
 ACPI_MODULE_NAME("processor_throttling");
 
+struct throttling_tstate {
+        unsigned int cpu;               /* cpu nr */
+        int target_state;               /* target T-state */
+};
+
+#define THROTTLING_PRECHANGE       (1)
+#define THROTTLING_POSTCHANGE      (2)
+
 static int acpi_processor_get_throttling(struct acpi_processor *pr);
 int acpi_processor_set_throttling(struct acpi_processor *pr, int state);
 
+static int acpi_processor_update_tsd_coord(void)
+{
+        int count, count_target;
+        int retval = 0;
+        unsigned int i, j;
+        cpumask_t covered_cpus;
+        struct acpi_processor *pr, *match_pr;
+        struct acpi_tsd_package *pdomain, *match_pdomain;
+        struct acpi_processor_throttling *pthrottling, *match_pthrottling;
+
+        /*
+         * Now that we have _TSD data from all CPUs, lets setup T-state
+         * coordination between all CPUs.
+         */
+        for_each_possible_cpu(i) {
+                pr = processors[i];
+                if (!pr)
+                        continue;
+
+                /* Basic validity check for domain info */
+                pthrottling = &(pr->throttling);
+
+                /*
+                 * If tsd package for one cpu is invalid, the coordination
+                 * among all CPUs is thought as invalid.
+                 * Maybe it is ugly.
+                 */
+                if (!pthrottling->tsd_valid_flag) {
+                        retval = -EINVAL;
+                        break;
+                }
+        }
+        if (retval)
+                goto err_ret;
+
+        cpus_clear(covered_cpus);
+        for_each_possible_cpu(i) {
+                pr = processors[i];
+                if (!pr)
+                        continue;
+
+                if (cpu_isset(i, covered_cpus))
+                        continue;
+                pthrottling = &pr->throttling;
+
+                pdomain = &(pthrottling->domain_info);
+                cpu_set(i, pthrottling->shared_cpu_map);
+                cpu_set(i, covered_cpus);
+                /*
+                 * If the number of processor in the TSD domain is 1, it is
+                 * unnecessary to parse the coordination for this CPU.
+                 */
+                if (pdomain->num_processors <= 1)
+                        continue;
+
+                /* Validate the Domain info */
+                count_target = pdomain->num_processors;
+                count = 1;
+
+                for_each_possible_cpu(j) {
+                        if (i == j)
+                                continue;
+
+                        match_pr = processors[j];
+                        if (!match_pr)
+                                continue;
+
+                        match_pthrottling = &(match_pr->throttling);
+                        match_pdomain = &(match_pthrottling->domain_info);
+                        if (match_pdomain->domain != pdomain->domain)
+                                continue;
+
+                        /* Here i and j are in the same domain.
+                         * If two TSD packages have the same domain, they
+                         * should have the same num_porcessors and
+                         * coordination type. Otherwise it will be regarded
+                         * as illegal.
+                         */
+                        if (match_pdomain->num_processors != count_target) {
+                                retval = -EINVAL;
+                                goto err_ret;
+                        }
+
+                        if (pdomain->coord_type != match_pdomain->coord_type) {
+                                retval = -EINVAL;
+                                goto err_ret;
+                        }
+
+                        cpu_set(j, covered_cpus);
+                        cpu_set(j, pthrottling->shared_cpu_map);
+                        count++;
+                }
+                for_each_possible_cpu(j) {
+                        if (i == j)
+                                continue;
+
+                        match_pr = processors[j];
+                        if (!match_pr)
+                                continue;
+
+                        match_pthrottling = &(match_pr->throttling);
+                        match_pdomain = &(match_pthrottling->domain_info);
+                        if (match_pdomain->domain != pdomain->domain)
+                                continue;
+
+                        /*
+                         * If some CPUS have the same domain, they
+                         * will have the same shared_cpu_map.
+                         */
+                        match_pthrottling->shared_cpu_map =
+                                pthrottling->shared_cpu_map;
+                }
+        }
+
+err_ret:
+        for_each_possible_cpu(i) {
+                pr = processors[i];
+                if (!pr)
+                        continue;
+
+                /*
+                 * Assume no coordination on any error parsing domain info.
+                 * The coordination type will be forced as SW_ALL.
+                 */
+                if (retval) {
+                        pthrottling = &(pr->throttling);
+                        cpus_clear(pthrottling->shared_cpu_map);
+                        cpu_set(i, pthrottling->shared_cpu_map);
+                        pthrottling->shared_type = DOMAIN_COORD_TYPE_SW_ALL;
+                }
+        }
+
+        return retval;
+}
+
+/*
+ * Update the T-state coordination after the _TSD
+ * data for all cpus is obtained.
+ */
+void acpi_processor_throttling_init(void)
+{
+        if (acpi_processor_update_tsd_coord())
+                ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+                        "Assume no T-state coordination\n"));
+
+        return;
+}
+
+static int acpi_processor_throttling_notifier(unsigned long event, void *data)
+{
+        struct throttling_tstate *p_tstate = data;
+        struct acpi_processor *pr;
+        unsigned int cpu ;
+        int target_state;
+        struct acpi_processor_limit *p_limit;
+        struct acpi_processor_throttling *p_throttling;
+
+        cpu = p_tstate->cpu;
+        pr = processors[cpu];
+        if (!pr) {
+                ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Invalid pr pointer\n"));
+                return 0;
+        }
+        if (!pr->flags.throttling) {
+                ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Throttling control is "
+                                "unsupported on CPU %d\n", cpu));
+                return 0;
+        }
+        target_state = p_tstate->target_state;
+        p_throttling = &(pr->throttling);
+        switch (event) {
+        case THROTTLING_PRECHANGE:
+                /*
+                 * Prechange event is used to choose one proper t-state,
+                 * which meets the limits of thermal, user and _TPC.
+                 */
+                p_limit = &pr->limit;
+                if (p_limit->thermal.tx > target_state)
+                        target_state = p_limit->thermal.tx;
+                if (p_limit->user.tx > target_state)
+                        target_state = p_limit->user.tx;
+                if (pr->throttling_platform_limit > target_state)
+                        target_state = pr->throttling_platform_limit;
+                if (target_state >= p_throttling->state_count) {
+                        printk(KERN_WARNING
+                                "Exceed the limit of T-state \n");
+                        target_state = p_throttling->state_count - 1;
+                }
+                p_tstate->target_state = target_state;
+                ACPI_DEBUG_PRINT((ACPI_DB_INFO, "PreChange Event:"
+                                "target T-state of CPU %d is T%d\n",
+                                cpu, target_state));
+                break;
+        case THROTTLING_POSTCHANGE:
+                /*
+                 * Postchange event is only used to update the
+                 * T-state flag of acpi_processor_throttling.
+                 */
+                p_throttling->state = target_state;
+                ACPI_DEBUG_PRINT((ACPI_DB_INFO, "PostChange Event:"
+                                "CPU %d is switched to T%d\n",
+                                cpu, target_state));
+                break;
+        default:
+                printk(KERN_WARNING
+                        "Unsupported Throttling notifier event\n");
+                break;
+        }
+
+        return 0;
+}
+
 /*
  * _TPC - Throttling Present Capabilities
  */
@@ -293,6 +513,10 @@ static int acpi_processor_get_tsd(struct acpi_processor *pr)
         struct acpi_buffer state = { 0, NULL };
         union acpi_object *tsd = NULL;
         struct acpi_tsd_package *pdomain;
+        struct acpi_processor_throttling *pthrottling;
+
+        pthrottling = &pr->throttling;
+        pthrottling->tsd_valid_flag = 0;
 
         status = acpi_evaluate_object(pr->handle, "_TSD", NULL, &buffer);
         if (ACPI_FAILURE(status)) {
@@ -340,6 +564,22 @@ static int acpi_processor_get_tsd(struct acpi_processor *pr)
                 goto end;
         }
 
+        pthrottling = &pr->throttling;
+        pthrottling->tsd_valid_flag = 1;
+        pthrottling->shared_type = pdomain->coord_type;
+        cpu_set(pr->id, pthrottling->shared_cpu_map);
+        /*
+         * If the coordination type is not defined in ACPI spec,
+         * the tsd_valid_flag will be clear and coordination type
+         * will be forecd as DOMAIN_COORD_TYPE_SW_ALL.
+         */
+        if (pdomain->coord_type != DOMAIN_COORD_TYPE_SW_ALL &&
+                pdomain->coord_type != DOMAIN_COORD_TYPE_SW_ANY &&
+                pdomain->coord_type != DOMAIN_COORD_TYPE_HW_ALL) {
+                pthrottling->tsd_valid_flag = 0;
+                pthrottling->shared_type = DOMAIN_COORD_TYPE_SW_ALL;
+        }
+
       end:
         kfree(buffer.pointer);
         return result;
@@ -589,6 +829,11 @@ static int acpi_processor_get_throttling(struct acpi_processor *pr)
         cpumask_t saved_mask;
         int ret;
 
+        if (!pr)
+                return -EINVAL;
+
+        if (!pr->flags.throttling)
+                return -ENODEV;
         /*
          * Migrate task to the cpu pointed by pr.
          */
@@ -742,13 +987,92 @@ static int acpi_processor_set_throttling_ptc(struct acpi_processor *pr,
 int acpi_processor_set_throttling(struct acpi_processor *pr, int state)
 {
         cpumask_t saved_mask;
-        int ret;
+        int ret = 0;
+        unsigned int i;
+        struct acpi_processor *match_pr;
+        struct acpi_processor_throttling *p_throttling;
+        struct throttling_tstate t_state;
+        cpumask_t online_throttling_cpus;
+
+        if (!pr)
+                return -EINVAL;
+
+        if (!pr->flags.throttling)
+                return -ENODEV;
+
+        if ((state < 0) || (state > (pr->throttling.state_count - 1)))
+                return -EINVAL;
+
+        saved_mask = current->cpus_allowed;
+        t_state.target_state = state;
+        p_throttling = &(pr->throttling);
+        cpus_and(online_throttling_cpus, cpu_online_map,
+                        p_throttling->shared_cpu_map);
         /*
-         * Migrate task to the cpu pointed by pr.
+         * The throttling notifier will be called for every
+         * affected cpu in order to get one proper T-state.
+         * The notifier event is THROTTLING_PRECHANGE.
          */
-        saved_mask = current->cpus_allowed;
-        set_cpus_allowed(current, cpumask_of_cpu(pr->id));
-        ret = pr->throttling.acpi_processor_set_throttling(pr, state);
+        for_each_cpu_mask(i, online_throttling_cpus) {
+                t_state.cpu = i;
+                acpi_processor_throttling_notifier(THROTTLING_PRECHANGE,
+                                                        &t_state);
+        }
+        /*
+         * The function of acpi_processor_set_throttling will be called
+         * to switch T-state. If the coordination type is SW_ALL or HW_ALL,
+         * it is necessary to call it for every affected cpu. Otherwise
+         * it can be called only for the cpu pointed by pr.
+         */
+        if (p_throttling->shared_type == DOMAIN_COORD_TYPE_SW_ANY) {
+                set_cpus_allowed(current, cpumask_of_cpu(pr->id));
+                ret = p_throttling->acpi_processor_set_throttling(pr,
+                                                t_state.target_state);
+        } else {
+                /*
+                 * When the T-state coordination is SW_ALL or HW_ALL,
+                 * it is necessary to set T-state for every affected
+                 * cpus.
+                 */
+                for_each_cpu_mask(i, online_throttling_cpus) {
+                        match_pr = processors[i];
+                        /*
+                         * If the pointer is invalid, we will report the
+                         * error message and continue.
+                         */
+                        if (!match_pr) {
+                                ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+                                        "Invalid Pointer for CPU %d\n", i));
+                                continue;
+                        }
+                        /*
+                         * If the throttling control is unsupported on CPU i,
+                         * we will report the error message and continue.
+                         */
+                        if (!match_pr->flags.throttling) {
+                                ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+                                        "Throttling Controll is unsupported "
+                                        "on CPU %d\n", i));
+                                continue;
+                        }
+                        t_state.cpu = i;
+                        set_cpus_allowed(current, cpumask_of_cpu(i));
+                        ret = match_pr->throttling.
+                                acpi_processor_set_throttling(
+                                match_pr, t_state.target_state);
+                }
+        }
+        /*
+         * After the set_throttling is called, the
+         * throttling notifier is called for every
+         * affected cpu to update the T-states.
+         * The notifier event is THROTTLING_POSTCHANGE
+         */
+        for_each_cpu_mask(i, online_throttling_cpus) {
+                t_state.cpu = i;
+                acpi_processor_throttling_notifier(THROTTLING_POSTCHANGE,
+                                                        &t_state);
+        }
         /* restore the previous state */
         set_cpus_allowed(current, saved_mask);
         return ret;
@@ -757,6 +1081,7 @@ int acpi_processor_set_throttling(struct acpi_processor *pr, int state)
 int acpi_processor_get_throttling_info(struct acpi_processor *pr)
 {
         int result = 0;
+        struct acpi_processor_throttling *pthrottling;
 
         ACPI_DEBUG_PRINT((ACPI_DB_INFO,
                           "pblk_address[0x%08x] duty_offset[%d] duty_width[%d]\n",
@@ -788,7 +1113,16 @@ int acpi_processor_get_throttling_info(struct acpi_processor *pr)
                     &acpi_processor_set_throttling_ptc;
         }
 
-        acpi_processor_get_tsd(pr);
+        /*
+         * If TSD package for one CPU can't be parsed successfully, it means
+         * that this CPU will have no coordination with other CPUs.
+         */
+        if (acpi_processor_get_tsd(pr)) {
+                pthrottling = &pr->throttling;
+                pthrottling->tsd_valid_flag = 0;
+                cpu_set(pr->id, pthrottling->shared_cpu_map);
+                pthrottling->shared_type = DOMAIN_COORD_TYPE_SW_ALL;
+        }
 
         /*
          * PIIX4 Errata: We don't support throttling on the original PIIX4.
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index d9d531cce27f..c7b0aa52dd23 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -941,6 +941,15 @@ static int acpi_bay_match(struct acpi_device *device){
         return -ENODEV;
 }
 
+/*
+ * acpi_dock_match - see if a device has a _DCK method
+ */
+static int acpi_dock_match(struct acpi_device *device)
+{
+        acpi_handle tmp;
+        return acpi_get_handle(device->handle, "_DCK", &tmp);
+}
+
 static void acpi_device_set_id(struct acpi_device *device,
                                struct acpi_device *parent, acpi_handle handle,
                                int type)
@@ -950,6 +959,7 @@ static void acpi_device_set_id(struct acpi_device *device,
         char *hid = NULL;
         char *uid = NULL;
         struct acpi_compatible_id_list *cid_list = NULL;
+        const char *cid_add = NULL;
         acpi_status status;
 
         switch (type) {
@@ -972,15 +982,18 @@ static void acpi_device_set_id(struct acpi_device *device,
                         device->flags.bus_address = 1;
                 }
 
-                if(!(info->valid & (ACPI_VALID_HID | ACPI_VALID_CID))){
-                        status = acpi_video_bus_match(device);
-                        if(ACPI_SUCCESS(status))
-                                hid = ACPI_VIDEO_HID;
+                /* If we have a video/bay/dock device, add our selfdefined
+                   HID to the CID list. Like that the video/bay/dock drivers
+                   will get autoloaded and the device might still match
+                   against another driver.
+                */
+                if (ACPI_SUCCESS(acpi_video_bus_match(device)))
+                        cid_add = ACPI_VIDEO_HID;
+                else if (ACPI_SUCCESS(acpi_bay_match(device)))
+                        cid_add = ACPI_BAY_HID;
+                else if (ACPI_SUCCESS(acpi_dock_match(device)))
+                        cid_add = ACPI_DOCK_HID;
 
-                        status = acpi_bay_match(device);
-                        if (ACPI_SUCCESS(status))
-                                hid = ACPI_BAY_HID;
-                }
                 break;
         case ACPI_BUS_TYPE_POWER:
                 hid = ACPI_POWER_HID;
@@ -1021,11 +1034,44 @@ static void acpi_device_set_id(struct acpi_device *device,
                 strcpy(device->pnp.unique_id, uid);
                 device->flags.unique_id = 1;
         }
-        if (cid_list) {
-                device->pnp.cid_list = kmalloc(cid_list->size, GFP_KERNEL);
-                if (device->pnp.cid_list)
-                        memcpy(device->pnp.cid_list, cid_list, cid_list->size);
-                else
+        if (cid_list || cid_add) {
+                struct  acpi_compatible_id_list *list;
+                int size = 0;
+                int count = 0;
+
+                if (cid_list) {
+                        size = cid_list->size;
+                } else if (cid_add) {
+                        size = sizeof(struct acpi_compatible_id_list);
+                        cid_list = ACPI_ALLOCATE_ZEROED((acpi_size) size);
+                        if (!cid_list) {
+                                printk(KERN_ERR "Memory allocation error\n");
+                                kfree(buffer.pointer);
+                                return;
+                        } else {
+                                cid_list->count = 0;
+                                cid_list->size = size;
+                        }
+                }
+                if (cid_add)
+                        size += sizeof(struct acpi_compatible_id);
+                list = kmalloc(size, GFP_KERNEL);
+
+                if (list) {
+                        if (cid_list) {
+                                memcpy(list, cid_list, cid_list->size);
+                                count = cid_list->count;
+                        }
+                        if (cid_add) {
+                                strncpy(list->id[count].value, cid_add,
+                                        ACPI_MAX_CID_LENGTH);
+                                count++;
+                                device->flags.compatible_ids = 1;
+                        }
+                        list->size = size;
+                        list->count = count;
+                        device->pnp.cid_list = list;
+                } else
                         printk(KERN_ERR "Memory allocation error\n");
         }
 
@@ -1081,6 +1127,20 @@ static int acpi_bus_remove(struct acpi_device *dev, int rmdevice)
 }
 
 static int
+acpi_is_child_device(struct acpi_device *device,
+                        int (*matcher)(struct acpi_device *))
+{
+        int result = -ENODEV;
+
+        do {
+                if (ACPI_SUCCESS(matcher(device)))
+                        return AE_OK;
+        } while ((device = device->parent));
+
+        return result;
+}
+
+static int
 acpi_add_single_object(struct acpi_device **child,
                        struct acpi_device *parent, acpi_handle handle, int type,
                         struct acpi_bus_ops *ops)
@@ -1131,10 +1191,20 @@ acpi_add_single_object(struct acpi_device **child,
         case ACPI_BUS_TYPE_PROCESSOR:
         case ACPI_BUS_TYPE_DEVICE:
                 result = acpi_bus_get_status(device);
-                if (ACPI_FAILURE(result) || !device->status.present) {
-                        result = -ENOENT;
+                if (ACPI_FAILURE(result)) {
+                        result = -ENODEV;
                         goto end;
                 }
+                if (!device->status.present) {
+                        /* Bay and dock should be handled even if absent */
+                        if (!ACPI_SUCCESS(
+                             acpi_is_child_device(device, acpi_bay_match)) &&
+                            !ACPI_SUCCESS(
+                             acpi_is_child_device(device, acpi_dock_match))) {
+                                        result = -ENODEV;
+                                        goto end;
+                        }
+                }
                 break;
         default:
                 STRUCT_TO_INT(device->status) =
diff --git a/drivers/acpi/sleep/main.c b/drivers/acpi/sleep/main.c
index 485de1347075..293a1cbb47c0 100644
--- a/drivers/acpi/sleep/main.c
+++ b/drivers/acpi/sleep/main.c
@@ -170,7 +170,7 @@ static int acpi_pm_enter(suspend_state_t pm_state)
         /* Reprogram control registers and execute _BFS */
         acpi_leave_sleep_state_prep(acpi_state);
 
-        /* ACPI 3.0 specs (P62) says that it's the responsabilty
+        /* ACPI 3.0 specs (P62) says that it's the responsibility
          * of the OSPM to clear the status bit [ implying that the
          * POWER_BUTTON event should not reach userspace ]
          */
@@ -472,11 +472,20 @@ int acpi_pm_device_sleep_state(struct device *dev, int wake, int *d_min_p)
         if (acpi_target_sleep_state == ACPI_STATE_S0 ||
             (wake && adev->wakeup.state.enabled &&
              adev->wakeup.sleep_state <= acpi_target_sleep_state)) {
+                acpi_status status;
+
                 acpi_method[3] = 'W';
-                acpi_evaluate_integer(handle, acpi_method, NULL, &d_max);
-                /* Sanity check */
-                if (d_max < d_min)
+                status = acpi_evaluate_integer(handle, acpi_method, NULL,
+                                                &d_max);
+                if (ACPI_FAILURE(status)) {
+                        d_max = d_min;
+                } else if (d_max < d_min) {
+                        /* Warn the user of the broken DSDT */
+                        printk(KERN_WARNING "ACPI: Wrong value from %s\n",
+                                acpi_method);
+                        /* Sanitize it */
                         d_min = d_max;
+                }
         }
 
         if (d_min_p)
diff --git a/drivers/acpi/sleep/proc.c b/drivers/acpi/sleep/proc.c
index 1538355c266b..f8df5217d477 100644
--- a/drivers/acpi/sleep/proc.c
+++ b/drivers/acpi/sleep/proc.c
@@ -178,6 +178,9 @@ static int get_date_field(char **p, u32 * value)
          * Try to find delimeter, only to insert null.  The end of the
          * string won't have one, but is still valid.
          */
+        if (*p == NULL)
+                return result;
+
         next = strpbrk(*p, "- :");
         if (next)
                 *next++ = '\0';
@@ -190,6 +193,8 @@ static int get_date_field(char **p, u32 * value)
 
         if (next)
                 *p = next;
+        else
+                *p = NULL;
 
         return result;
 }
@@ -251,27 +256,6 @@ acpi_system_write_alarm(struct file *file,
         if ((result = get_date_field(&p, &sec)))
                 goto end;
 
-        if (sec > 59) {
-                min += 1;
-                sec -= 60;
-        }
-        if (min > 59) {
-                hr += 1;
-                min -= 60;
-        }
-        if (hr > 23) {
-                day += 1;
-                hr -= 24;
-        }
-        if (day > 31) {
-                mo += 1;
-                day -= 31;
-        }
-        if (mo > 12) {
-                yr += 1;
-                mo -= 12;
-        }
-
         spin_lock_irq(&rtc_lock);
 
         rtc_control = CMOS_READ(RTC_CONTROL);
@@ -288,24 +272,24 @@ acpi_system_write_alarm(struct file *file,
         spin_unlock_irq(&rtc_lock);
 
         if (sec > 59) {
-                min++;
-                sec -= 60;
+                min += sec/60;
+                sec = sec%60;
         }
         if (min > 59) {
-                hr++;
-                min -= 60;
+                hr += min/60;
+                min = min%60;
         }
         if (hr > 23) {
-                day++;
-                hr -= 24;
+                day += hr/24;
+                hr = hr%24;
         }
         if (day > 31) {
-                mo++;
-                day -= 31;
+                mo += day/32;
+                day = day%32;
         }
         if (mo > 12) {
-                yr++;
-                mo -= 12;
+                yr += mo/13;
+                mo = mo%13;
         }
 
         spin_lock_irq(&rtc_lock);
diff --git a/drivers/acpi/system.c b/drivers/acpi/system.c
index 5ffe0ea18967..ce881713f7a6 100644
--- a/drivers/acpi/system.c
+++ b/drivers/acpi/system.c
@@ -40,6 +40,8 @@ ACPI_MODULE_NAME("system");
 #define ACPI_SYSTEM_CLASS               "system"
 #define ACPI_SYSTEM_DEVICE_NAME         "System"
 
+u32 acpi_irq_handled;
+
 /*
  * Make ACPICA version work as module param
  */
@@ -166,6 +168,212 @@ static int acpi_system_sysfs_init(void)
         return 0;
 }
 
+/*
+ * Detailed ACPI IRQ counters in /sys/firmware/acpi/interrupts/
+ * See Documentation/ABI/testing/sysfs-firmware-acpi
+ */
+
+#define COUNT_GPE 0
+#define COUNT_SCI 1     /* acpi_irq_handled */
+#define COUNT_ERROR 2   /* other */
+#define NUM_COUNTERS_EXTRA 3
+
+static u32 *all_counters;
+static u32 num_gpes;
+static u32 num_counters;
+static struct attribute **all_attrs;
+static u32 acpi_gpe_count;
+
+static struct attribute_group interrupt_stats_attr_group = {
+        .name = "interrupts",
+};
+static struct kobj_attribute *counter_attrs;
+
+static int count_num_gpes(void)
+{
+        int count = 0;
+        struct acpi_gpe_xrupt_info *gpe_xrupt_info;
+        struct acpi_gpe_block_info *gpe_block;
+        acpi_cpu_flags flags;
+
+        flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
+
+        gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head;
+        while (gpe_xrupt_info) {
+                gpe_block = gpe_xrupt_info->gpe_block_list_head;
+                while (gpe_block) {
+                        count += gpe_block->register_count *
+                            ACPI_GPE_REGISTER_WIDTH;
+                        gpe_block = gpe_block->next;
+                }
+                gpe_xrupt_info = gpe_xrupt_info->next;
+        }
+        acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
+
+        return count;
+}
+
+static void delete_gpe_attr_array(void)
+{
+        u32 *tmp = all_counters;
+
+        all_counters = NULL;
+        kfree(tmp);
+
+        if (counter_attrs) {
+                int i;
+
+                for (i = 0; i < num_gpes; i++)
+                        kfree(counter_attrs[i].attr.name);
+
+                kfree(counter_attrs);
+        }
+        kfree(all_attrs);
+
+        return;
+}
+
+void acpi_os_gpe_count(u32 gpe_number)
+{
+        acpi_gpe_count++;
+
+        if (!all_counters)
+                return;
+
+        if (gpe_number < num_gpes)
+                all_counters[gpe_number]++;
+        else
+                all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR]++;
+
+        return;
+}
+
+void acpi_os_fixed_event_count(u32 event_number)
+{
+        if (!all_counters)
+                return;
+
+        if (event_number < ACPI_NUM_FIXED_EVENTS)
+                all_counters[num_gpes + event_number]++;
+        else
+                all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR]++;
+
+        return;
+}
+
+static ssize_t counter_show(struct kobject *kobj,
+        struct kobj_attribute *attr, char *buf)
+{
+        all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI] =
+                acpi_irq_handled;
+        all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE] =
+                acpi_gpe_count;
+
+        return sprintf(buf, "%d\n", all_counters[attr - counter_attrs]);
+}
+
+/*
+ * counter_set() sets the specified counter.
+ * setting the total "sci" file to any value clears all counters.
+ */
+static ssize_t counter_set(struct kobject *kobj,
+        struct kobj_attribute *attr, const char *buf, size_t size)
+{
+        int index = attr - counter_attrs;
+
+        if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) {
+                int i;
+                for (i = 0; i < num_counters; ++i)
+                        all_counters[i] = 0;
+                acpi_gpe_count = 0;
+                acpi_irq_handled = 0;
+
+        } else
+                all_counters[index] = strtoul(buf, NULL, 0);
+
+        return size;
+}
+
+void acpi_irq_stats_init(void)
+{
+        int i;
+
+        if (all_counters)
+                return;
+
+        num_gpes = count_num_gpes();
+        num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA;
+
+        all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1),
+                        GFP_KERNEL);
+        if (all_attrs == NULL)
+                return;
+
+        all_counters = kzalloc(sizeof(u32) * (num_counters), GFP_KERNEL);
+        if (all_counters == NULL)
+                goto fail;
+
+        counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters),
+                        GFP_KERNEL);
+        if (counter_attrs == NULL)
+                goto fail;
+
+        for (i = 0; i < num_counters; ++i) {
+                char buffer[10];
+                char *name;
+
+                if (i < num_gpes)
+                        sprintf(buffer, "gpe%02X", i);
+                else if (i == num_gpes + ACPI_EVENT_PMTIMER)
+                        sprintf(buffer, "ff_pmtimer");
+                else if (i == num_gpes + ACPI_EVENT_GLOBAL)
+                        sprintf(buffer, "ff_gbl_lock");
+                else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON)
+                        sprintf(buffer, "ff_pwr_btn");
+                else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON)
+                        sprintf(buffer, "ff_slp_btn");
+                else if (i == num_gpes + ACPI_EVENT_RTC)
+                        sprintf(buffer, "ff_rt_clk");
+                else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE)
+                        sprintf(buffer, "gpe_all");
+                else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI)
+                        sprintf(buffer, "sci");
+                else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR)
+                        sprintf(buffer, "error");
+                else
+                        sprintf(buffer, "bug%02X", i);
+
+                name = kzalloc(strlen(buffer) + 1, GFP_KERNEL);
+                if (name == NULL)
+                        goto fail;
+                strncpy(name, buffer, strlen(buffer) + 1);
+
+                counter_attrs[i].attr.name = name;
+                counter_attrs[i].attr.mode = 0644;
+                counter_attrs[i].show = counter_show;
+                counter_attrs[i].store = counter_set;
+
+                all_attrs[i] = &counter_attrs[i].attr;
+        }
+
+        interrupt_stats_attr_group.attrs = all_attrs;
+        sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group);
+        return;
+
+fail:
+        delete_gpe_attr_array();
+        return;
+}
+
+static void __exit interrupt_stats_exit(void)
+{
+        sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group);
+
+        delete_gpe_attr_array();
+
+        return;
+}
+
 /* --------------------------------------------------------------------------
                               FS Interface (/proc)
    -------------------------------------------------------------------------- */
diff --git a/drivers/acpi/tables/Makefile b/drivers/acpi/tables/Makefile
index 0a7d7afac255..7385efa61622 100644
--- a/drivers/acpi/tables/Makefile
+++ b/drivers/acpi/tables/Makefile
@@ -2,6 +2,6 @@
 # Makefile for all Linux ACPI interpreter subdirectories
 #
 
-obj-y := tbxface.o tbinstal.o  tbutils.o tbfind.o tbfadt.o
+obj-y := tbxface.o tbinstal.o tbutils.o tbfind.o tbfadt.o tbxfroot.o
 
 EXTRA_CFLAGS += $(ACPI_CFLAGS)
diff --git a/drivers/acpi/tables/tbxfroot.c b/drivers/acpi/tables/tbxfroot.c
index cf8fa514189f..9ecb4b6c1e7d 100644
--- a/drivers/acpi/tables/tbxfroot.c
+++ b/drivers/acpi/tables/tbxfroot.c
@@ -100,7 +100,7 @@ static acpi_status acpi_tb_validate_rsdp(struct acpi_table_rsdp *rsdp)
 
 /*******************************************************************************
  *
- * FUNCTION:    acpi_tb_find_rsdp
+ * FUNCTION:    acpi_find_root_pointer
  *
  * PARAMETERS:  table_address           - Where the table pointer is returned
  *
@@ -219,8 +219,6 @@ acpi_status acpi_find_root_pointer(acpi_native_uint * table_address)
         return_ACPI_STATUS(AE_NOT_FOUND);
 }
 
-ACPI_EXPORT_SYMBOL(acpi_find_root_pointer)
-
 /*******************************************************************************
  *
  * FUNCTION:    acpi_tb_scan_memory_for_rsdp
diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index 5f79b4451212..8d4b79b4f933 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -43,7 +43,7 @@
 #include <linux/seq_file.h>
 #include <linux/reboot.h>
 #include <asm/uaccess.h>
-
+#include <linux/thermal.h>
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi_drivers.h>
 
@@ -65,9 +65,6 @@
 #define ACPI_THERMAL_MAX_ACTIVE 10
 #define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65
 
-#define KELVIN_TO_CELSIUS(t)    (long)(((long)t-2732>=0) ? ((long)t-2732+5)/10 : ((long)t-2732-5)/10)
-#define CELSIUS_TO_KELVIN(t)    ((t+273)*10)
-
 #define _COMPONENT              ACPI_THERMAL_COMPONENT
 ACPI_MODULE_NAME("thermal");
 
@@ -195,6 +192,8 @@ struct acpi_thermal {
         struct acpi_thermal_trips trips;
         struct acpi_handle_list devices;
         struct timer_list timer;
+        struct thermal_zone_device *thermal_zone;
+        int tz_enabled;
         struct mutex lock;
 };
 
@@ -321,178 +320,226 @@ static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode)
         return 0;
 }
 
-static int acpi_thermal_get_trip_points(struct acpi_thermal *tz)
-{
-        acpi_status status = AE_OK;
-        int i = 0;
+#define ACPI_TRIPS_CRITICAL     0x01
+#define ACPI_TRIPS_HOT          0x02
+#define ACPI_TRIPS_PASSIVE      0x04
+#define ACPI_TRIPS_ACTIVE       0x08
+#define ACPI_TRIPS_DEVICES      0x10
 
+#define ACPI_TRIPS_REFRESH_THRESHOLDS   (ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE)
+#define ACPI_TRIPS_REFRESH_DEVICES      ACPI_TRIPS_DEVICES
 
-        if (!tz)
-                return -EINVAL;
+#define ACPI_TRIPS_INIT      (ACPI_TRIPS_CRITICAL | ACPI_TRIPS_HOT |    \
+                              ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE |  \
+                              ACPI_TRIPS_DEVICES)
 
-        /* Critical Shutdown (required) */
-
-        status = acpi_evaluate_integer(tz->device->handle, "_CRT", NULL,
-                                       &tz->trips.critical.temperature);
-        if (ACPI_FAILURE(status)) {
-                tz->trips.critical.flags.valid = 0;
-                ACPI_EXCEPTION((AE_INFO, status, "No critical threshold"));
-                return -ENODEV;
-        } else {
-                tz->trips.critical.flags.valid = 1;
-                ACPI_DEBUG_PRINT((ACPI_DB_INFO,
-                                  "Found critical threshold [%lu]\n",
-                                  tz->trips.critical.temperature));
-        }
+/*
+ * This exception is thrown out in two cases:
+ * 1.An invalid trip point becomes invalid or a valid trip point becomes invalid
+ *   when re-evaluating the AML code.
+ * 2.TODO: Devices listed in _PSL, _ALx, _TZD may change.
+ *   We need to re-bind the cooling devices of a thermal zone when this occurs.
+ */
+#define ACPI_THERMAL_TRIPS_EXCEPTION(flags, str)        \
+do {    \
+        if (flags != ACPI_TRIPS_INIT)   \
+                ACPI_EXCEPTION((AE_INFO, AE_ERROR,      \
+                "ACPI thermal trip point %s changed\n"  \
+                "Please send acpidump to linux-acpi@vger.kernel.org\n", str)); \
+} while (0)
+
+static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
+{
+        acpi_status status = AE_OK;
+        struct acpi_handle_list devices;
+        int valid = 0;
+        int i;
 
-        if (tz->trips.critical.flags.valid == 1) {
-                if (crt == -1) {
+        /* Critical Shutdown (required) */
+        if (flag & ACPI_TRIPS_CRITICAL) {
+                status = acpi_evaluate_integer(tz->device->handle,
+                                "_CRT", NULL, &tz->trips.critical.temperature);
+                if (ACPI_FAILURE(status)) {
                         tz->trips.critical.flags.valid = 0;
-                } else if (crt > 0) {
-                        unsigned long crt_k = CELSIUS_TO_KELVIN(crt);
-
-                        /*
-                         * Allow override to lower critical threshold
-                         */
-                        if (crt_k < tz->trips.critical.temperature)
-                                tz->trips.critical.temperature = crt_k;
+                        ACPI_EXCEPTION((AE_INFO, status,
+                                        "No critical threshold"));
+                        return -ENODEV;
+                } else {
+                        tz->trips.critical.flags.valid = 1;
+                        ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+                                        "Found critical threshold [%lu]\n",
+                                        tz->trips.critical.temperature));
+                }
+                if (tz->trips.critical.flags.valid == 1) {
+                        if (crt == -1) {
+                                tz->trips.critical.flags.valid = 0;
+                        } else if (crt > 0) {
+                                unsigned long crt_k = CELSIUS_TO_KELVIN(crt);
+                                /*
+                                 * Allow override to lower critical threshold
+                                 */
+                                if (crt_k < tz->trips.critical.temperature)
+                                        tz->trips.critical.temperature = crt_k;
+                        }
                 }
         }
 
         /* Critical Sleep (optional) */
-
-        status =
-            acpi_evaluate_integer(tz->device->handle, "_HOT", NULL,
-                                  &tz->trips.hot.temperature);
-        if (ACPI_FAILURE(status)) {
-                tz->trips.hot.flags.valid = 0;
-                ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No hot threshold\n"));
-        } else {
-                tz->trips.hot.flags.valid = 1;
-                ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found hot threshold [%lu]\n",
-                                  tz->trips.hot.temperature));
-        }
-
-        /* Passive: Processors (optional) */
-
-        if (psv == -1) {
-                status = AE_SUPPORT;
-        } else if (psv > 0) {
-                tz->trips.passive.temperature = CELSIUS_TO_KELVIN(psv);
-                status = AE_OK;
-        } else {
+        if (flag & ACPI_TRIPS_HOT) {
                 status = acpi_evaluate_integer(tz->device->handle,
-                        "_PSV", NULL, &tz->trips.passive.temperature);
+                                "_HOT", NULL, &tz->trips.hot.temperature);
+                if (ACPI_FAILURE(status)) {
+                        tz->trips.hot.flags.valid = 0;
+                        ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+                                        "No hot threshold\n"));
+                } else {
+                        tz->trips.hot.flags.valid = 1;
+                        ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+                                        "Found hot threshold [%lu]\n",
+                                        tz->trips.critical.temperature));
+                }
         }
 
-        if (ACPI_FAILURE(status)) {
-                tz->trips.passive.flags.valid = 0;
-                ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No passive threshold\n"));
-        } else {
-                tz->trips.passive.flags.valid = 1;
-
-                status =
-                    acpi_evaluate_integer(tz->device->handle, "_TC1", NULL,
-                                          &tz->trips.passive.tc1);
-                if (ACPI_FAILURE(status))
-                        tz->trips.passive.flags.valid = 0;
-
-                status =
-                    acpi_evaluate_integer(tz->device->handle, "_TC2", NULL,
-                                          &tz->trips.passive.tc2);
-                if (ACPI_FAILURE(status))
-                        tz->trips.passive.flags.valid = 0;
+        /* Passive (optional) */
+        if (flag & ACPI_TRIPS_PASSIVE) {
+                valid = tz->trips.passive.flags.valid;
+                if (psv == -1) {
+                        status = AE_SUPPORT;
+                } else if (psv > 0) {
+                        tz->trips.passive.temperature = CELSIUS_TO_KELVIN(psv);
+                        status = AE_OK;
+                } else {
+                        status = acpi_evaluate_integer(tz->device->handle,
+                                "_PSV", NULL, &tz->trips.passive.temperature);
+                }
 
-                status =
-                    acpi_evaluate_integer(tz->device->handle, "_TSP", NULL,
-                                          &tz->trips.passive.tsp);
                 if (ACPI_FAILURE(status))
                         tz->trips.passive.flags.valid = 0;
-
-                status =
-                    acpi_evaluate_reference(tz->device->handle, "_PSL", NULL,
-                                            &tz->trips.passive.devices);
+                else {
+                        tz->trips.passive.flags.valid = 1;
+                        if (flag == ACPI_TRIPS_INIT) {
+                                status = acpi_evaluate_integer(
+                                                tz->device->handle, "_TC1",
+                                                NULL, &tz->trips.passive.tc1);
+                                if (ACPI_FAILURE(status))
+                                        tz->trips.passive.flags.valid = 0;
+                                status = acpi_evaluate_integer(
+                                                tz->device->handle, "_TC2",
+                                                NULL, &tz->trips.passive.tc2);
+                                if (ACPI_FAILURE(status))
+                                        tz->trips.passive.flags.valid = 0;
+                                status = acpi_evaluate_integer(
+                                                tz->device->handle, "_TSP",
+                                                NULL, &tz->trips.passive.tsp);
+                                if (ACPI_FAILURE(status))
+                                        tz->trips.passive.flags.valid = 0;
+                        }
+                }
+        }
+        if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.flags.valid) {
+                memset(&devices, 0, sizeof(struct acpi_handle_list));
+                status = acpi_evaluate_reference(tz->device->handle, "_PSL",
+                                                        NULL, &devices);
                 if (ACPI_FAILURE(status))
                         tz->trips.passive.flags.valid = 0;
-
-                if (!tz->trips.passive.flags.valid)
-                        printk(KERN_WARNING PREFIX "Invalid passive threshold\n");
                 else
-                        ACPI_DEBUG_PRINT((ACPI_DB_INFO,
-                                          "Found passive threshold [%lu]\n",
-                                          tz->trips.passive.temperature));
-        }
+                        tz->trips.passive.flags.valid = 1;
 
-        /* Active: Fans, etc. (optional) */
+                if (memcmp(&tz->trips.passive.devices, &devices,
+                                sizeof(struct acpi_handle_list))) {
+                        memcpy(&tz->trips.passive.devices, &devices,
+                                sizeof(struct acpi_handle_list));
+                        ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
+                }
+        }
+        if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) {
+                if (valid != tz->trips.passive.flags.valid)
+                                ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state");
+        }
 
+        /* Active (optional) */
         for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
-
                 char name[5] = { '_', 'A', 'C', ('0' + i), '\0' };
+                valid = tz->trips.active[i].flags.valid;
 
                 if (act == -1)
-                        break;  /* disable all active trip points */
-
-                status = acpi_evaluate_integer(tz->device->handle,
-                        name, NULL, &tz->trips.active[i].temperature);
-
-                if (ACPI_FAILURE(status)) {
-                        if (i == 0)     /* no active trip points */
+                        break; /* disable all active trip points */
+
+                if (flag & ACPI_TRIPS_ACTIVE) {
+                        status = acpi_evaluate_integer(tz->device->handle,
+                                name, NULL, &tz->trips.active[i].temperature);
+                        if (ACPI_FAILURE(status)) {
+                                tz->trips.active[i].flags.valid = 0;
+                                if (i == 0)
+                                        break;
+                                if (act <= 0)
+                                        break;
+                                if (i == 1)
+                                        tz->trips.active[0].temperature =
+                                                CELSIUS_TO_KELVIN(act);
+                                else
+                                        /*
+                                         * Don't allow override higher than
+                                         * the next higher trip point
+                                         */
+                                        tz->trips.active[i - 1].temperature =
+                                                (tz->trips.active[i - 2].temperature <
+                                                CELSIUS_TO_KELVIN(act) ?
+                                                tz->trips.active[i - 2].temperature :
+                                                CELSIUS_TO_KELVIN(act));
                                 break;
-                        if (act <= 0)   /* no override requested */
-                                break;
-                        if (i == 1) {   /* 1 trip point */
-                                tz->trips.active[0].temperature =
-                                        CELSIUS_TO_KELVIN(act);
-                        } else {        /* multiple trips */
-                                /*
-                                 * Don't allow override higher than
-                                 * the next higher trip point
-                                 */
-                                tz->trips.active[i - 1].temperature =
-                                    (tz->trips.active[i - 2].temperature <
-                                        CELSIUS_TO_KELVIN(act) ?
-                                        tz->trips.active[i - 2].temperature :
-                                        CELSIUS_TO_KELVIN(act));
-                        }
-                        break;
+                        } else
+                                tz->trips.active[i].flags.valid = 1;
                 }
 
                 name[2] = 'L';
-                status =
-                    acpi_evaluate_reference(tz->device->handle, name, NULL,
-                                            &tz->trips.active[i].devices);
-                if (ACPI_SUCCESS(status)) {
-                        tz->trips.active[i].flags.valid = 1;
-                        ACPI_DEBUG_PRINT((ACPI_DB_INFO,
-                                          "Found active threshold [%d]:[%lu]\n",
-                                          i, tz->trips.active[i].temperature));
-                } else
-                        ACPI_EXCEPTION((AE_INFO, status,
-                                        "Invalid active threshold [%d]", i));
+                if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].flags.valid ) {
+                        memset(&devices, 0, sizeof(struct acpi_handle_list));
+                        status = acpi_evaluate_reference(tz->device->handle,
+                                                name, NULL, &devices);
+                        if (ACPI_FAILURE(status))
+                                tz->trips.active[i].flags.valid = 0;
+                        else
+                                tz->trips.active[i].flags.valid = 1;
+
+                        if (memcmp(&tz->trips.active[i].devices, &devices,
+                                        sizeof(struct acpi_handle_list))) {
+                                memcpy(&tz->trips.active[i].devices, &devices,
+                                        sizeof(struct acpi_handle_list));
+                                ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
+                        }
+                }
+                if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES))
+                        if (valid != tz->trips.active[i].flags.valid)
+                                ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state");
+
+                if (!tz->trips.active[i].flags.valid)
+                        break;
+        }
+
+        if (flag & ACPI_TRIPS_DEVICES) {
+                memset(&devices, 0, sizeof(struct acpi_handle_list));
+                status = acpi_evaluate_reference(tz->device->handle, "_TZD",
+                                                NULL, &devices);
+                if (memcmp(&tz->devices, &devices,
+                                sizeof(struct acpi_handle_list))) {
+                        memcpy(&tz->devices, &devices,
+                                sizeof(struct acpi_handle_list));
+                        ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
+                }
         }
 
         return 0;
 }
 
-static int acpi_thermal_get_devices(struct acpi_thermal *tz)
+static int acpi_thermal_get_trip_points(struct acpi_thermal *tz)
 {
-        acpi_status status = AE_OK;
-
-
-        if (!tz)
-                return -EINVAL;
-
-        status =
-            acpi_evaluate_reference(tz->device->handle, "_TZD", NULL, &tz->devices);
-        if (ACPI_FAILURE(status))
-                return -ENODEV;
-
-        return 0;
+        return acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT);
 }
 
 static int acpi_thermal_critical(struct acpi_thermal *tz)
 {
-        if (!tz || !tz->trips.critical.flags.valid || nocrt)
+        if (!tz || !tz->trips.critical.flags.valid)
                 return -EINVAL;
 
         if (tz->temperature >= tz->trips.critical.temperature) {
@@ -501,9 +548,6 @@ static int acpi_thermal_critical(struct acpi_thermal *tz)
         } else if (tz->trips.critical.flags.enabled)
                 tz->trips.critical.flags.enabled = 0;
 
-        printk(KERN_EMERG
-               "Critical temperature reached (%ld C), shutting down.\n",
-               KELVIN_TO_CELSIUS(tz->temperature));
         acpi_bus_generate_proc_event(tz->device, ACPI_THERMAL_NOTIFY_CRITICAL,
                                 tz->trips.critical.flags.enabled);
         acpi_bus_generate_netlink_event(tz->device->pnp.device_class,
@@ -511,14 +555,20 @@ static int acpi_thermal_critical(struct acpi_thermal *tz)
                                           ACPI_THERMAL_NOTIFY_CRITICAL,
                                           tz->trips.critical.flags.enabled);
 
-        orderly_poweroff(true);
+        /* take no action if nocrt is set */
+        if(!nocrt) {
+                printk(KERN_EMERG
+                        "Critical temperature reached (%ld C), shutting down.\n",
+                        KELVIN_TO_CELSIUS(tz->temperature));
+                orderly_poweroff(true);
+        }
 
         return 0;
 }
 
 static int acpi_thermal_hot(struct acpi_thermal *tz)
 {
-        if (!tz || !tz->trips.hot.flags.valid || nocrt)
+        if (!tz || !tz->trips.hot.flags.valid)
                 return -EINVAL;
 
         if (tz->temperature >= tz->trips.hot.temperature) {
@@ -534,7 +584,7 @@ static int acpi_thermal_hot(struct acpi_thermal *tz)
                                           ACPI_THERMAL_NOTIFY_HOT,
                                           tz->trips.hot.flags.enabled);
 
-        /* TBD: Call user-mode "sleep(S4)" function */
+        /* TBD: Call user-mode "sleep(S4)" function if nocrt is cleared */
 
         return 0;
 }
@@ -732,6 +782,9 @@ static void acpi_thermal_check(void *data)
         if (result)
                 goto unlock;
 
+        if (!tz->tz_enabled)
+                goto unlock;
+
         memset(&tz->state, 0, sizeof(tz->state));
 
         /*
@@ -825,6 +878,290 @@ static void acpi_thermal_check(void *data)
         mutex_unlock(&tz->lock);
 }
 
+/* sys I/F for generic thermal sysfs support */
+static int thermal_get_temp(struct thermal_zone_device *thermal, char *buf)
+{
+        struct acpi_thermal *tz = thermal->devdata;
+
+        if (!tz)
+                return -EINVAL;
+
+        return sprintf(buf, "%ld\n", KELVIN_TO_CELSIUS(tz->temperature));
+}
+
+static const char enabled[] = "kernel";
+static const char disabled[] = "user";
+static int thermal_get_mode(struct thermal_zone_device *thermal,
+                                char *buf)
+{
+        struct acpi_thermal *tz = thermal->devdata;
+
+        if (!tz)
+                return -EINVAL;
+
+        return sprintf(buf, "%s\n", tz->tz_enabled ?
+                        enabled : disabled);
+}
+
+static int thermal_set_mode(struct thermal_zone_device *thermal,
+                                const char *buf)
+{
+        struct acpi_thermal *tz = thermal->devdata;
+        int enable;
+
+        if (!tz)
+                return -EINVAL;
+
+        /*
+         * enable/disable thermal management from ACPI thermal driver
+         */
+        if (!strncmp(buf, enabled, sizeof enabled - 1))
+                enable = 1;
+        else if (!strncmp(buf, disabled, sizeof disabled - 1))
+                enable = 0;
+        else
+                return -EINVAL;
+
+        if (enable != tz->tz_enabled) {
+                tz->tz_enabled = enable;
+                ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+                        "%s ACPI thermal control\n",
+                        tz->tz_enabled ? enabled : disabled));
+                acpi_thermal_check(tz);
+        }
+        return 0;
+}
+
+static int thermal_get_trip_type(struct thermal_zone_device *thermal,
+                                 int trip, char *buf)
+{
+        struct acpi_thermal *tz = thermal->devdata;
+        int i;
+
+        if (!tz || trip < 0)
+                return -EINVAL;
+
+        if (tz->trips.critical.flags.valid) {
+                if (!trip)
+                        return sprintf(buf, "critical\n");
+                trip--;
+        }
+
+        if (tz->trips.hot.flags.valid) {
+                if (!trip)
+                        return sprintf(buf, "hot\n");
+                trip--;
+        }
+
+        if (tz->trips.passive.flags.valid) {
+                if (!trip)
+                        return sprintf(buf, "passive\n");
+                trip--;
+        }
+
+        for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
+                tz->trips.active[i].flags.valid; i++) {
+                if (!trip)
+                        return sprintf(buf, "active%d\n", i);
+                trip--;
+        }
+
+        return -EINVAL;
+}
+
+static int thermal_get_trip_temp(struct thermal_zone_device *thermal,
+                                 int trip, char *buf)
+{
+        struct acpi_thermal *tz = thermal->devdata;
+        int i;
+
+        if (!tz || trip < 0)
+                return -EINVAL;
+
+        if (tz->trips.critical.flags.valid) {
+                if (!trip)
+                        return sprintf(buf, "%ld\n", KELVIN_TO_CELSIUS(
+                                tz->trips.critical.temperature));
+                trip--;
+        }
+
+        if (tz->trips.hot.flags.valid) {
+                if (!trip)
+                        return sprintf(buf, "%ld\n", KELVIN_TO_CELSIUS(
+                                        tz->trips.hot.temperature));
+                trip--;
+        }
+
+        if (tz->trips.passive.flags.valid) {
+                if (!trip)
+                        return sprintf(buf, "%ld\n", KELVIN_TO_CELSIUS(
+                                        tz->trips.passive.temperature));
+                trip--;
+        }
+
+        for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
+                tz->trips.active[i].flags.valid; i++) {
+                if (!trip)
+                        return sprintf(buf, "%ld\n", KELVIN_TO_CELSIUS(
+                                        tz->trips.active[i].temperature));
+                trip--;
+        }
+
+        return -EINVAL;
+}
+
+typedef int (*cb)(struct thermal_zone_device *, int,
+                  struct thermal_cooling_device *);
+static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal,
+                                        struct thermal_cooling_device *cdev,
+                                        cb action)
+{
+        struct acpi_device *device = cdev->devdata;
+        struct acpi_thermal *tz = thermal->devdata;
+        struct acpi_device *dev;
+        acpi_status status;
+        acpi_handle handle;
+        int i;
+        int j;
+        int trip = -1;
+        int result = 0;
+
+        if (tz->trips.critical.flags.valid)
+                trip++;
+
+        if (tz->trips.hot.flags.valid)
+                trip++;
+
+        if (tz->trips.passive.flags.valid) {
+                trip++;
+                for (i = 0; i < tz->trips.passive.devices.count;
+                    i++) {
+                        handle = tz->trips.passive.devices.handles[i];
+                        status = acpi_bus_get_device(handle, &dev);
+                        if (ACPI_SUCCESS(status) && (dev == device)) {
+                                result = action(thermal, trip, cdev);
+                                if (result)
+                                        goto failed;
+                        }
+                }
+        }
+
+        for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
+                if (!tz->trips.active[i].flags.valid)
+                        break;
+                trip++;
+                for (j = 0;
+                    j < tz->trips.active[i].devices.count;
+                    j++) {
+                        handle = tz->trips.active[i].devices.handles[j];
+                        status = acpi_bus_get_device(handle, &dev);
+                        if (ACPI_SUCCESS(status) && (dev == device)) {
+                                result = action(thermal, trip, cdev);
+                                if (result)
+                                        goto failed;
+                        }
+                }
+        }
+
+        for (i = 0; i < tz->devices.count; i++) {
+                handle = tz->devices.handles[i];
+                status = acpi_bus_get_device(handle, &dev);
+                if (ACPI_SUCCESS(status) && (dev == device)) {
+                        result = action(thermal, -1, cdev);
+                        if (result)
+                                goto failed;
+                }
+        }
+
+failed:
+        return result;
+}
+
+static int
+acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal,
+                                        struct thermal_cooling_device *cdev)
+{
+        return acpi_thermal_cooling_device_cb(thermal, cdev,
+                                thermal_zone_bind_cooling_device);
+}
+
+static int
+acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal,
+                                        struct thermal_cooling_device *cdev)
+{
+        return acpi_thermal_cooling_device_cb(thermal, cdev,
+                                thermal_zone_unbind_cooling_device);
+}
+
+static struct thermal_zone_device_ops acpi_thermal_zone_ops = {
+        .bind = acpi_thermal_bind_cooling_device,
+        .unbind = acpi_thermal_unbind_cooling_device,
+        .get_temp = thermal_get_temp,
+        .get_mode = thermal_get_mode,
+        .set_mode = thermal_set_mode,
+        .get_trip_type = thermal_get_trip_type,
+        .get_trip_temp = thermal_get_trip_temp,
+};
+
+static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
+{
+        int trips = 0;
+        int result;
+        acpi_status status;
+        int i;
+
+        if (tz->trips.critical.flags.valid)
+                trips++;
+
+        if (tz->trips.hot.flags.valid)
+                trips++;
+
+        if (tz->trips.passive.flags.valid)
+                trips++;
+
+        for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
+                        tz->trips.active[i].flags.valid; i++, trips++);
+        tz->thermal_zone = thermal_zone_device_register("ACPI thermal zone",
+                                        trips, tz, &acpi_thermal_zone_ops);
+        if (!tz->thermal_zone)
+                return -ENODEV;
+
+        result = sysfs_create_link(&tz->device->dev.kobj,
+                                   &tz->thermal_zone->device.kobj, "thermal_zone");
+        if (result)
+                return result;
+
+        result = sysfs_create_link(&tz->thermal_zone->device.kobj,
+                                   &tz->device->dev.kobj, "device");
+        if (result)
+                return result;
+
+        status = acpi_attach_data(tz->device->handle,
+                                  acpi_bus_private_data_handler,
+                                  tz->thermal_zone);
+        if (ACPI_FAILURE(status)) {
+                ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+                                "Error attaching device data\n"));
+                return -ENODEV;
+        }
+
+        tz->tz_enabled = 1;
+
+        printk(KERN_INFO PREFIX "%s is registered as thermal_zone%d\n",
+                        tz->device->dev.bus_id, tz->thermal_zone->id);
+        return 0;
+}
+
+static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz)
+{
+        sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone");
+        sysfs_remove_link(&tz->thermal_zone->device.kobj, "device");
+        thermal_zone_device_unregister(tz->thermal_zone);
+        tz->thermal_zone = NULL;
+        acpi_detach_data(tz->device->handle, acpi_bus_private_data_handler);
+}
+
+
 /* --------------------------------------------------------------------------
                               FS Interface (/proc)
    -------------------------------------------------------------------------- */
@@ -1181,15 +1518,15 @@ static void acpi_thermal_notify(acpi_handle handle, u32 event, void *data)
                 acpi_thermal_check(tz);
                 break;
         case ACPI_THERMAL_NOTIFY_THRESHOLDS:
-                acpi_thermal_get_trip_points(tz);
+                acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS);
                 acpi_thermal_check(tz);
                 acpi_bus_generate_proc_event(device, event, 0);
                 acpi_bus_generate_netlink_event(device->pnp.device_class,
                                                   device->dev.bus_id, event, 0);
                 break;
         case ACPI_THERMAL_NOTIFY_DEVICES:
-                if (tz->flags.devices)
-                        acpi_thermal_get_devices(tz);
+                acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES);
+                acpi_thermal_check(tz);
                 acpi_bus_generate_proc_event(device, event, 0);
                 acpi_bus_generate_netlink_event(device->pnp.device_class,
                                                   device->dev.bus_id, event, 0);
@@ -1232,11 +1569,6 @@ static int acpi_thermal_get_info(struct acpi_thermal *tz)
         else
                 acpi_thermal_get_polling_frequency(tz);
 
-        /* Get devices in this thermal zone [_TZD] (optional) */
-        result = acpi_thermal_get_devices(tz);
-        if (!result)
-                tz->flags.devices = 1;
-
         return 0;
 }
 
@@ -1260,13 +1592,19 @@ static int acpi_thermal_add(struct acpi_device *device)
         strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS);
         acpi_driver_data(device) = tz;
         mutex_init(&tz->lock);
+
+
         result = acpi_thermal_get_info(tz);
         if (result)
-                goto end;
+                goto free_memory;
+
+        result = acpi_thermal_register_thermal_zone(tz);
+        if (result)
+                goto free_memory;
 
         result = acpi_thermal_add_fs(device);
         if (result)
-                goto end;
+                goto unregister_thermal_zone;
 
         init_timer(&tz->timer);
 
@@ -1277,19 +1615,21 @@ static int acpi_thermal_add(struct acpi_device *device)
                                              acpi_thermal_notify, tz);
         if (ACPI_FAILURE(status)) {
                 result = -ENODEV;
-                goto end;
+                goto remove_fs;
         }
 
         printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n",
                acpi_device_name(device), acpi_device_bid(device),
                KELVIN_TO_CELSIUS(tz->temperature));
+        goto end;
 
-      end:
-        if (result) {
-                acpi_thermal_remove_fs(device);
-                kfree(tz);
-        }
-
+remove_fs:
+        acpi_thermal_remove_fs(device);
+unregister_thermal_zone:
+        thermal_zone_device_unregister(tz->thermal_zone);
+free_memory:
+        kfree(tz);
+end:
         return result;
 }
 
@@ -1329,6 +1669,7 @@ static int acpi_thermal_remove(struct acpi_device *device, int type)
         }
 
         acpi_thermal_remove_fs(device);
+        acpi_thermal_unregister_thermal_zone(tz);
         mutex_destroy(&tz->lock);
         kfree(tz);
         return 0;
diff --git a/drivers/acpi/utilities/utglobal.c b/drivers/acpi/utilities/utglobal.c
index 93ea8290b4f7..630c9a2c5b7b 100644
--- a/drivers/acpi/utilities/utglobal.c
+++ b/drivers/acpi/utilities/utglobal.c
@@ -671,7 +671,6 @@ void acpi_ut_init_globals(void)
 
         /* GPE support */
 
-        acpi_gpe_count = 0;
         acpi_gbl_gpe_xrupt_list_head = NULL;
         acpi_gbl_gpe_fadt_blocks[0] = NULL;
         acpi_gbl_gpe_fadt_blocks[1] = NULL;
@@ -735,4 +734,3 @@ void acpi_ut_init_globals(void)
 
 ACPI_EXPORT_SYMBOL(acpi_dbg_level)
     ACPI_EXPORT_SYMBOL(acpi_dbg_layer)
-    ACPI_EXPORT_SYMBOL(acpi_gpe_count)
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index bd77e81e81c1..7f714fa2a454 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -34,6 +34,7 @@
 #include <linux/seq_file.h>
 #include <linux/input.h>
 #include <linux/backlight.h>
+#include <linux/thermal.h>
 #include <linux/video_output.h>
 #include <asm/uaccess.h>
 
@@ -72,8 +73,12 @@ MODULE_AUTHOR("Bruno Ducrot");
 MODULE_DESCRIPTION("ACPI Video Driver");
 MODULE_LICENSE("GPL");
 
+static int brightness_switch_enabled = 1;
+module_param(brightness_switch_enabled, bool, 0644);
+
 static int acpi_video_bus_add(struct acpi_device *device);
 static int acpi_video_bus_remove(struct acpi_device *device, int type);
+static int acpi_video_resume(struct acpi_device *device);
 
 static const struct acpi_device_id video_device_ids[] = {
         {ACPI_VIDEO_HID, 0},
@@ -88,6 +93,7 @@ static struct acpi_driver acpi_video_bus = {
         .ops = {
                 .add = acpi_video_bus_add,
                 .remove = acpi_video_bus_remove,
+                .resume = acpi_video_resume,
                 },
 };
 
@@ -179,6 +185,7 @@ struct acpi_video_device {
         struct acpi_device *dev;
         struct acpi_video_device_brightness *brightness;
         struct backlight_device *backlight;
+        struct thermal_cooling_device *cdev;
         struct output_device *output_dev;
 };
 
@@ -273,7 +280,6 @@ static void acpi_video_device_rebind(struct acpi_video_bus *video);
 static void acpi_video_device_bind(struct acpi_video_bus *video,
                                    struct acpi_video_device *device);
 static int acpi_video_device_enumerate(struct acpi_video_bus *video);
-static int acpi_video_switch_output(struct acpi_video_bus *video, int event);
 static int acpi_video_device_lcd_set_level(struct acpi_video_device *device,
                         int level);
 static int acpi_video_device_lcd_get_level_current(
@@ -292,18 +298,26 @@ static int acpi_video_device_set_state(struct acpi_video_device *device, int sta
 static int acpi_video_get_brightness(struct backlight_device *bd)
 {
         unsigned long cur_level;
+        int i;
         struct acpi_video_device *vd =
                 (struct acpi_video_device *)bl_get_data(bd);
         acpi_video_device_lcd_get_level_current(vd, &cur_level);
-        return (int) cur_level;
+        for (i = 2; i < vd->brightness->count; i++) {
+                if (vd->brightness->levels[i] == cur_level)
+                        /* The first two entries are special - see page 575
+                           of the ACPI spec 3.0 */
+                        return i-2;
+        }
+        return 0;
 }
 
 static int acpi_video_set_brightness(struct backlight_device *bd)
 {
-        int request_level = bd->props.brightness;
+        int request_level = bd->props.brightness+2;
         struct acpi_video_device *vd =
                 (struct acpi_video_device *)bl_get_data(bd);
-        acpi_video_device_lcd_set_level(vd, request_level);
+        acpi_video_device_lcd_set_level(vd,
+                                        vd->brightness->levels[request_level]);
         return 0;
 }
 
@@ -334,6 +348,54 @@ static struct output_properties acpi_output_properties = {
         .set_state = acpi_video_output_set,
         .get_status = acpi_video_output_get,
 };
+
+
+/* thermal cooling device callbacks */
+static int video_get_max_state(struct thermal_cooling_device *cdev, char *buf)
+{
+        struct acpi_device *device = cdev->devdata;
+        struct acpi_video_device *video = acpi_driver_data(device);
+
+        return sprintf(buf, "%d\n", video->brightness->count - 3);
+}
+
+static int video_get_cur_state(struct thermal_cooling_device *cdev, char *buf)
+{
+        struct acpi_device *device = cdev->devdata;
+        struct acpi_video_device *video = acpi_driver_data(device);
+        unsigned long level;
+        int state;
+
+        acpi_video_device_lcd_get_level_current(video, &level);
+        for (state = 2; state < video->brightness->count; state++)
+                if (level == video->brightness->levels[state])
+                        return sprintf(buf, "%d\n",
+                                       video->brightness->count - state - 1);
+
+        return -EINVAL;
+}
+
+static int
+video_set_cur_state(struct thermal_cooling_device *cdev, unsigned int state)
+{
+        struct acpi_device *device = cdev->devdata;
+        struct acpi_video_device *video = acpi_driver_data(device);
+        int level;
+
+        if ( state >= video->brightness->count - 2)
+                return -EINVAL;
+
+        state = video->brightness->count - state;
+        level = video->brightness->levels[state -1];
+        return acpi_video_device_lcd_set_level(video, level);
+}
+
+static struct thermal_cooling_device_ops video_cooling_ops = {
+        .get_max_state = video_get_max_state,
+        .get_cur_state = video_get_cur_state,
+        .set_cur_state = video_set_cur_state,
+};
+
 /* --------------------------------------------------------------------------
                                Video Management
    -------------------------------------------------------------------------- */
@@ -652,7 +714,7 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device)
         kfree(obj);
 
         if (device->cap._BCL && device->cap._BCM && device->cap._BQC && max_level > 0){
-                unsigned long tmp;
+                int result;
                 static int count = 0;
                 char *name;
                 name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
@@ -660,14 +722,30 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device)
                         return;
 
                 sprintf(name, "acpi_video%d", count++);
-                acpi_video_device_lcd_get_level_current(device, &tmp);
                 device->backlight = backlight_device_register(name,
                         NULL, device, &acpi_backlight_ops);
-                device->backlight->props.max_brightness = max_level;
-                device->backlight->props.brightness = (int)tmp;
+                device->backlight->props.max_brightness = device->brightness->count-3;
+                device->backlight->props.brightness = acpi_video_get_brightness(device->backlight);
                 backlight_update_status(device->backlight);
-
                 kfree(name);
+
+                device->cdev = thermal_cooling_device_register("LCD",
+                                        device->dev, &video_cooling_ops);
+                if (device->cdev) {
+                        printk(KERN_INFO PREFIX
+                                "%s is registered as cooling_device%d\n",
+                                device->dev->dev.bus_id, device->cdev->id);
+                        result = sysfs_create_link(&device->dev->dev.kobj,
+                                          &device->cdev->device.kobj,
+                                          "thermal_cooling");
+                        if (result)
+                                printk(KERN_ERR PREFIX "Create sysfs link\n");
+                        result = sysfs_create_link(&device->cdev->device.kobj,
+                                          &device->dev->dev.kobj,
+                                          "device");
+                        if (result)
+                                printk(KERN_ERR PREFIX "Create sysfs link\n");
+                }
         }
         if (device->cap._DCS && device->cap._DSS){
                 static int count = 0;
@@ -726,11 +804,40 @@ static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
 static int acpi_video_bus_check(struct acpi_video_bus *video)
 {
         acpi_status status = -ENOENT;
-
+        long device_id;
+        struct device *dev;
+        struct acpi_device *device;
 
         if (!video)
                 return -EINVAL;
 
+        device = video->device;
+
+        status =
+            acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
+
+        if (!ACPI_SUCCESS(status))
+                return -ENODEV;
+
+        /* We need to attempt to determine whether the _ADR refers to a
+           PCI device or not. There's no terribly good way to do this,
+           so the best we can hope for is to assume that there'll never
+           be a video device in the host bridge */
+        if (device_id >= 0x10000) {
+                /* It looks like a PCI device. Does it exist? */
+                dev = acpi_get_physical_device(device->handle);
+        } else {
+                /* It doesn't look like a PCI device. Does its parent
+                   exist? */
+                acpi_handle phandle;
+                if (acpi_get_parent(device->handle, &phandle))
+                        return -ENODEV;
+                dev = acpi_get_physical_device(phandle);
+        }
+        if (!dev)
+                return -ENODEV;
+        put_device(dev);
+
         /* Since there is no HID, CID and so on for VGA driver, we have
          * to check well known required nodes.
          */
@@ -1256,8 +1363,37 @@ acpi_video_bus_write_DOS(struct file *file,
 
 static int acpi_video_bus_add_fs(struct acpi_device *device)
 {
+        long device_id;
+        int status;
         struct proc_dir_entry *entry = NULL;
         struct acpi_video_bus *video;
+        struct device *dev;
+
+        status =
+            acpi_evaluate_integer(device->handle, "_ADR", NULL, &device_id);
+
+        if (!ACPI_SUCCESS(status))
+                return -ENODEV;
+
+        /* We need to attempt to determine whether the _ADR refers to a
+           PCI device or not. There's no terribly good way to do this,
+           so the best we can hope for is to assume that there'll never
+           be a video device in the host bridge */
+        if (device_id >= 0x10000) {
+                /* It looks like a PCI device. Does it exist? */
+                dev = acpi_get_physical_device(device->handle);
+        } else {
+                /* It doesn't look like a PCI device. Does its parent
+                   exist? */
+                acpi_handle phandle;
+                if (acpi_get_parent(device->handle, &phandle))
+                        return -ENODEV;
+                dev = acpi_get_physical_device(phandle);
+        }
+        if (!dev)
+                return -ENODEV;
+        put_device(dev);
+
 
 
         video = acpi_driver_data(device);
@@ -1580,64 +1716,6 @@ static int acpi_video_device_enumerate(struct acpi_video_bus *video)
         return status;
 }
 
-/*
- *  Arg:
- *      video   : video bus device 
- *      event   : notify event
- *
- *  Return:
- *      < 0     : error
- *  
- *      1. Find out the current active output device.
- *      2. Identify the next output device to switch to.
- *      3. call _DSS to do actual switch.
- */
-
-static int acpi_video_switch_output(struct acpi_video_bus *video, int event)
-{
-        struct list_head *node;
-        struct acpi_video_device *dev = NULL;
-        struct acpi_video_device *dev_next = NULL;
-        struct acpi_video_device *dev_prev = NULL;
-        unsigned long state;
-        int status = 0;
-
-        mutex_lock(&video->device_list_lock);
-
-        list_for_each(node, &video->video_device_list) {
-                dev = container_of(node, struct acpi_video_device, entry);
-                status = acpi_video_device_get_state(dev, &state);
-                if (state & 0x2) {
-                        dev_next = container_of(node->next,
-                                        struct acpi_video_device, entry);
-                        dev_prev = container_of(node->prev,
-                                        struct acpi_video_device, entry);
-                        goto out;
-                }
-        }
-
-        dev_next = container_of(node->next, struct acpi_video_device, entry);
-        dev_prev = container_of(node->prev, struct acpi_video_device, entry);
-
- out:
-        mutex_unlock(&video->device_list_lock);
-
-        switch (event) {
-        case ACPI_VIDEO_NOTIFY_CYCLE:
-        case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT:
-                acpi_video_device_set_state(dev, 0);
-                acpi_video_device_set_state(dev_next, 0x80000001);
-                break;
-        case ACPI_VIDEO_NOTIFY_PREV_OUTPUT:
-                acpi_video_device_set_state(dev, 0);
-                acpi_video_device_set_state(dev_prev, 0x80000001);
-        default:
-                break;
-        }
-
-        return status;
-}
-
 static int
 acpi_video_get_next_level(struct acpi_video_device *device,
                           u32 level_current, u32 event)
@@ -1729,6 +1807,14 @@ static int acpi_video_bus_put_one_device(struct acpi_video_device *device)
                                             ACPI_DEVICE_NOTIFY,
                                             acpi_video_device_notify);
         backlight_device_unregister(device->backlight);
+        if (device->cdev) {
+                sysfs_remove_link(&device->dev->dev.kobj,
+                                  "thermal_cooling");
+                sysfs_remove_link(&device->cdev->device.kobj,
+                                  "device");
+                thermal_cooling_device_unregister(device->cdev);
+                device->cdev = NULL;
+        }
         video_output_unregister(device->output_dev);
 
         return 0;
@@ -1797,23 +1883,19 @@ static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data)
                                          * connector. */
                 acpi_video_device_enumerate(video);
                 acpi_video_device_rebind(video);
-                acpi_video_switch_output(video, event);
                 acpi_bus_generate_proc_event(device, event, 0);
                 keycode = KEY_SWITCHVIDEOMODE;
                 break;
 
         case ACPI_VIDEO_NOTIFY_CYCLE:   /* Cycle Display output hotkey pressed. */
-                acpi_video_switch_output(video, event);
                 acpi_bus_generate_proc_event(device, event, 0);
                 keycode = KEY_SWITCHVIDEOMODE;
                 break;
         case ACPI_VIDEO_NOTIFY_NEXT_OUTPUT:     /* Next Display output hotkey pressed. */
-                acpi_video_switch_output(video, event);
                 acpi_bus_generate_proc_event(device, event, 0);
                 keycode = KEY_VIDEO_NEXT;
                 break;
         case ACPI_VIDEO_NOTIFY_PREV_OUTPUT:     /* previous Display output hotkey pressed. */
-                acpi_video_switch_output(video, event);
                 acpi_bus_generate_proc_event(device, event, 0);
                 keycode = KEY_VIDEO_PREV;
                 break;
@@ -1825,6 +1907,7 @@ static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data)
                 break;
         }
 
+        acpi_notifier_call_chain(device, event, 0);
         input_report_key(input, keycode, 1);
         input_sync(input);
         input_report_key(input, keycode, 0);
@@ -1850,27 +1933,32 @@ static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
 
         switch (event) {
         case ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS:        /* Cycle brightness */
-                acpi_video_switch_brightness(video_device, event);
+                if (brightness_switch_enabled)
+                        acpi_video_switch_brightness(video_device, event);
                 acpi_bus_generate_proc_event(device, event, 0);
                 keycode = KEY_BRIGHTNESS_CYCLE;
                 break;
         case ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS:  /* Increase brightness */
-                acpi_video_switch_brightness(video_device, event);
+                if (brightness_switch_enabled)
+                        acpi_video_switch_brightness(video_device, event);
                 acpi_bus_generate_proc_event(device, event, 0);
                 keycode = KEY_BRIGHTNESSUP;
                 break;
         case ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS:  /* Decrease brightness */
-                acpi_video_switch_brightness(video_device, event);
+                if (brightness_switch_enabled)
+                        acpi_video_switch_brightness(video_device, event);
                 acpi_bus_generate_proc_event(device, event, 0);
                 keycode = KEY_BRIGHTNESSDOWN;
                 break;
         case ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS: /* zero brightnesss */
-                acpi_video_switch_brightness(video_device, event);
+                if (brightness_switch_enabled)
+                        acpi_video_switch_brightness(video_device, event);
                 acpi_bus_generate_proc_event(device, event, 0);
                 keycode = KEY_BRIGHTNESS_ZERO;
                 break;
         case ACPI_VIDEO_NOTIFY_DISPLAY_OFF:     /* display device off */
-                acpi_video_switch_brightness(video_device, event);
+                if (brightness_switch_enabled)
+                        acpi_video_switch_brightness(video_device, event);
                 acpi_bus_generate_proc_event(device, event, 0);
                 keycode = KEY_DISPLAY_OFF;
                 break;
@@ -1881,6 +1969,7 @@ static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
                 break;
         }
 
+        acpi_notifier_call_chain(device, event, 0);
         input_report_key(input, keycode, 1);
         input_sync(input);
         input_report_key(input, keycode, 0);
@@ -1890,6 +1979,25 @@ static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
 }
 
 static int instance;
+static int acpi_video_resume(struct acpi_device *device)
+{
+        struct acpi_video_bus *video;
+        struct acpi_video_device *video_device;
+        int i;
+
+        if (!device || !acpi_driver_data(device))
+                return -EINVAL;
+
+        video = acpi_driver_data(device);
+
+        for (i = 0; i < video->attached_count; i++) {
+                video_device = video->attached_array[i].bind_info;
+                if (video_device && video_device->backlight)
+                        acpi_video_set_brightness(video_device->backlight);
+        }
+        return AE_OK;
+}
+
 static int acpi_video_bus_add(struct acpi_device *device)
 {
         acpi_status status;
diff --git a/drivers/acpi/wmi.c b/drivers/acpi/wmi.c
new file mode 100644
index 000000000000..36b84ab418dd
--- /dev/null
+++ b/drivers/acpi/wmi.c
@@ -0,0 +1,710 @@
+/*
+ *  ACPI-WMI mapping driver
+ *
+ *  Copyright (C) 2007-2008 Carlos Corbacho <carlos@strangeworlds.co.uk>
+ *
+ *  GUID parsing code from ldm.c is:
+ *   Copyright (C) 2001,2002 Richard Russon <ldm@flatcap.org>
+ *   Copyright (c) 2001-2007 Anton Altaparmakov
+ *   Copyright (C) 2001,2002 Jakob Kemi <jakob.kemi@telia.com>
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ *  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, or (at
+ *  your option) any later version.
+ *
+ *  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.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/list.h>
+#include <linux/acpi.h>
+#include <acpi/acpi_bus.h>
+#include <acpi/acpi_drivers.h>
+
+ACPI_MODULE_NAME("wmi");
+MODULE_AUTHOR("Carlos Corbacho");
+MODULE_DESCRIPTION("ACPI-WMI Mapping Driver");
+MODULE_LICENSE("GPL");
+
+#define ACPI_WMI_CLASS "wmi"
+
+#undef PREFIX
+#define PREFIX "ACPI: WMI: "
+
+static DEFINE_MUTEX(wmi_data_lock);
+
+struct guid_block {
+        char guid[16];
+        union {
+                char object_id[2];
+                struct {
+                        unsigned char notify_id;
+                        unsigned char reserved;
+                };
+        };
+        u8 instance_count;
+        u8 flags;
+};
+
+struct wmi_block {
+        struct list_head list;
+        struct guid_block gblock;
+        acpi_handle handle;
+        wmi_notify_handler handler;
+        void *handler_data;
+};
+
+static struct wmi_block wmi_blocks;
+
+/*
+ * If the GUID data block is marked as expensive, we must enable and
+ * explicitily disable data collection.
+ */
+#define ACPI_WMI_EXPENSIVE   0x1
+#define ACPI_WMI_METHOD      0x2        /* GUID is a method */
+#define ACPI_WMI_STRING      0x4        /* GUID takes & returns a string */
+#define ACPI_WMI_EVENT       0x8        /* GUID is an event */
+
+static int acpi_wmi_remove(struct acpi_device *device, int type);
+static int acpi_wmi_add(struct acpi_device *device);
+
+static const struct acpi_device_id wmi_device_ids[] = {
+        {"PNP0C14", 0},
+        {"pnp0c14", 0},
+        {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, wmi_device_ids);
+
+static struct acpi_driver acpi_wmi_driver = {
+        .name = "wmi",
+        .class = ACPI_WMI_CLASS,
+        .ids = wmi_device_ids,
+        .ops = {
+                .add = acpi_wmi_add,
+                .remove = acpi_wmi_remove,
+                },
+};
+
+/*
+ * GUID parsing functions
+ */
+
+/**
+ * wmi_parse_hexbyte - Convert a ASCII hex number to a byte
+ * @src:  Pointer to at least 2 characters to convert.
+ *
+ * Convert a two character ASCII hex string to a number.
+ *
+ * Return:  0-255  Success, the byte was parsed correctly
+ *          -1     Error, an invalid character was supplied
+ */
+static int wmi_parse_hexbyte(const u8 *src)
+{
+        unsigned int x; /* For correct wrapping */
+        int h;
+
+        /* high part */
+        x = src[0];
+        if (x - '0' <= '9' - '0') {
+                h = x - '0';
+        } else if (x - 'a' <= 'f' - 'a') {
+                h = x - 'a' + 10;
+        } else if (x - 'A' <= 'F' - 'A') {
+                h = x - 'A' + 10;
+        } else {
+                return -1;
+        }
+        h <<= 4;
+
+        /* low part */
+        x = src[1];
+        if (x - '0' <= '9' - '0')
+                return h | (x - '0');
+        if (x - 'a' <= 'f' - 'a')
+                return h | (x - 'a' + 10);
+        if (x - 'A' <= 'F' - 'A')
+                return h | (x - 'A' + 10);
+        return -1;
+}
+
+/**
+ * wmi_swap_bytes - Rearrange GUID bytes to match GUID binary
+ * @src:   Memory block holding binary GUID (16 bytes)
+ * @dest:  Memory block to hold byte swapped binary GUID (16 bytes)
+ *
+ * Byte swap a binary GUID to match it's real GUID value
+ */
+static void wmi_swap_bytes(u8 *src, u8 *dest)
+{
+        int i;
+
+        for (i = 0; i <= 3; i++)
+                memcpy(dest + i, src + (3 - i), 1);
+
+        for (i = 0; i <= 1; i++)
+                memcpy(dest + 4 + i, src + (5 - i), 1);
+
+        for (i = 0; i <= 1; i++)
+                memcpy(dest + 6 + i, src + (7 - i), 1);
+
+        memcpy(dest + 8, src + 8, 8);
+}
+
+/**
+ * wmi_parse_guid - Convert GUID from ASCII to binary
+ * @src:   36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba
+ * @dest:  Memory block to hold binary GUID (16 bytes)
+ *
+ * N.B. The GUID need not be NULL terminated.
+ *
+ * Return:  'true'   @dest contains binary GUID
+ *          'false'  @dest contents are undefined
+ */
+static bool wmi_parse_guid(const u8 *src, u8 *dest)
+{
+        static const int size[] = { 4, 2, 2, 2, 6 };
+        int i, j, v;
+
+        if (src[8]  != '-' || src[13] != '-' ||
+                src[18] != '-' || src[23] != '-')
+                return false;
+
+        for (j = 0; j < 5; j++, src++) {
+                for (i = 0; i < size[j]; i++, src += 2, *dest++ = v) {
+                        v = wmi_parse_hexbyte(src);
+                        if (v < 0)
+                                return false;
+                }
+        }
+
+        return true;
+}
+
+static bool find_guid(const char *guid_string, struct wmi_block **out)
+{
+        char tmp[16], guid_input[16];
+        struct wmi_block *wblock;
+        struct guid_block *block;
+        struct list_head *p;
+
+        wmi_parse_guid(guid_string, tmp);
+        wmi_swap_bytes(tmp, guid_input);
+
+        list_for_each(p, &wmi_blocks.list) {
+                wblock = list_entry(p, struct wmi_block, list);
+                block = &wblock->gblock;
+
+                if (memcmp(block->guid, guid_input, 16) == 0) {
+                        if (out)
+                                *out = wblock;
+                        return 1;
+                }
+        }
+        return 0;
+}
+
+/*
+ * Exported WMI functions
+ */
+/**
+ * wmi_evaluate_method - Evaluate a WMI method
+ * @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba
+ * @instance: Instance index
+ * @method_id: Method ID to call
+ * &in: Buffer containing input for the method call
+ * &out: Empty buffer to return the method results
+ *
+ * Call an ACPI-WMI method
+ */
+acpi_status wmi_evaluate_method(const char *guid_string, u8 instance,
+u32 method_id, const struct acpi_buffer *in, struct acpi_buffer *out)
+{
+        struct guid_block *block = NULL;
+        struct wmi_block *wblock = NULL;
+        acpi_handle handle;
+        acpi_status status;
+        struct acpi_object_list input;
+        union acpi_object params[3];
+        char method[4] = "WM";
+
+        if (!find_guid(guid_string, &wblock))
+                return AE_BAD_ADDRESS;
+
+        block = &wblock->gblock;
+        handle = wblock->handle;
+
+        if (!block->flags & ACPI_WMI_METHOD)
+                return AE_BAD_DATA;
+
+        if (block->instance_count < instance)
+                return AE_BAD_PARAMETER;
+
+        input.count = 2;
+        input.pointer = params;
+        params[0].type = ACPI_TYPE_INTEGER;
+        params[0].integer.value = instance;
+        params[1].type = ACPI_TYPE_INTEGER;
+        params[1].integer.value = method_id;
+
+        if (in) {
+                input.count = 3;
+
+                if (block->flags & ACPI_WMI_STRING) {
+                        params[2].type = ACPI_TYPE_STRING;
+                } else {
+                        params[2].type = ACPI_TYPE_BUFFER;
+                }
+                params[2].buffer.length = in->length;
+                params[2].buffer.pointer = in->pointer;
+        }
+
+        strncat(method, block->object_id, 2);
+
+        status = acpi_evaluate_object(handle, method, &input, out);
+
+        return status;
+}
+EXPORT_SYMBOL_GPL(wmi_evaluate_method);
+
+/**
+ * wmi_query_block - Return contents of a WMI block
+ * @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba
+ * @instance: Instance index
+ * &out: Empty buffer to return the contents of the data block to
+ *
+ * Return the contents of an ACPI-WMI data block to a buffer
+ */
+acpi_status wmi_query_block(const char *guid_string, u8 instance,
+struct acpi_buffer *out)
+{
+        struct guid_block *block = NULL;
+        struct wmi_block *wblock = NULL;
+        acpi_handle handle;
+        acpi_status status, wc_status = AE_ERROR;
+        struct acpi_object_list input, wc_input;
+        union acpi_object wc_params[1], wq_params[1];
+        char method[4];
+        char wc_method[4] = "WC";
+
+        if (!guid_string || !out)
+                return AE_BAD_PARAMETER;
+
+        if (!find_guid(guid_string, &wblock))
+                return AE_BAD_ADDRESS;
+
+        block = &wblock->gblock;
+        handle = wblock->handle;
+
+        if (block->instance_count < instance)
+                return AE_BAD_PARAMETER;
+
+        /* Check GUID is a data block */
+        if (block->flags & (ACPI_WMI_EVENT | ACPI_WMI_METHOD))
+                return AE_BAD_ADDRESS;
+
+        input.count = 1;
+        input.pointer = wq_params;
+        wq_params[0].type = ACPI_TYPE_INTEGER;
+        wq_params[0].integer.value = instance;
+
+        /*
+         * If ACPI_WMI_EXPENSIVE, call the relevant WCxx method first to
+         * enable collection.
+         */
+        if (block->flags & ACPI_WMI_EXPENSIVE) {
+                wc_input.count = 1;
+                wc_input.pointer = wc_params;
+                wc_params[0].type = ACPI_TYPE_INTEGER;
+                wc_params[0].integer.value = 1;
+
+                strncat(wc_method, block->object_id, 2);
+
+                /*
+                 * Some GUIDs break the specification by declaring themselves
+                 * expensive, but have no corresponding WCxx method. So we
+                 * should not fail if this happens.
+                 */
+                wc_status = acpi_evaluate_object(handle, wc_method,
+                        &wc_input, NULL);
+        }
+
+        strcpy(method, "WQ");
+        strncat(method, block->object_id, 2);
+
+        status = acpi_evaluate_object(handle, method, NULL, out);
+
+        /*
+         * If ACPI_WMI_EXPENSIVE, call the relevant WCxx method, even if
+         * the WQxx method failed - we should disable collection anyway.
+         */
+        if ((block->flags & ACPI_WMI_EXPENSIVE) && wc_status) {
+                wc_params[0].integer.value = 0;
+                status = acpi_evaluate_object(handle,
+                wc_method, &wc_input, NULL);
+        }
+
+        return status;
+}
+EXPORT_SYMBOL_GPL(wmi_query_block);
+
+/**
+ * wmi_set_block - Write to a WMI block
+ * @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba
+ * @instance: Instance index
+ * &in: Buffer containing new values for the data block
+ *
+ * Write the contents of the input buffer to an ACPI-WMI data block
+ */
+acpi_status wmi_set_block(const char *guid_string, u8 instance,
+const struct acpi_buffer *in)
+{
+        struct guid_block *block = NULL;
+        struct wmi_block *wblock = NULL;
+        acpi_handle handle;
+        struct acpi_object_list input;
+        union acpi_object params[2];
+        char method[4] = "WS";
+
+        if (!guid_string || !in)
+                return AE_BAD_DATA;
+
+        if (!find_guid(guid_string, &wblock))
+                return AE_BAD_ADDRESS;
+
+        block = &wblock->gblock;
+        handle = wblock->handle;
+
+        if (block->instance_count < instance)
+                return AE_BAD_PARAMETER;
+
+        /* Check GUID is a data block */
+        if (block->flags & (ACPI_WMI_EVENT | ACPI_WMI_METHOD))
+                return AE_BAD_ADDRESS;
+
+        input.count = 2;
+        input.pointer = params;
+        params[0].type = ACPI_TYPE_INTEGER;
+        params[0].integer.value = instance;
+
+        if (block->flags & ACPI_WMI_STRING) {
+                params[1].type = ACPI_TYPE_STRING;
+        } else {
+                params[1].type = ACPI_TYPE_BUFFER;
+        }
+        params[1].buffer.length = in->length;
+        params[1].buffer.pointer = in->pointer;
+
+        strncat(method, block->object_id, 2);
+
+        return acpi_evaluate_object(handle, method, &input, NULL);
+}
+EXPORT_SYMBOL_GPL(wmi_set_block);
+
+/**
+ * wmi_install_notify_handler - Register handler for WMI events
+ * @handler: Function to handle notifications
+ * @data: Data to be returned to handler when event is fired
+ *
+ * Register a handler for events sent to the ACPI-WMI mapper device.
+ */
+acpi_status wmi_install_notify_handler(const char *guid,
+wmi_notify_handler handler, void *data)
+{
+        struct wmi_block *block;
+
+        if (!guid || !handler)
+                return AE_BAD_PARAMETER;
+
+        find_guid(guid, &block);
+        if (!block)
+                return AE_NOT_EXIST;
+
+        if (block->handler)
+                return AE_ALREADY_ACQUIRED;
+
+        block->handler = handler;
+        block->handler_data = data;
+
+        return AE_OK;
+}
+EXPORT_SYMBOL_GPL(wmi_install_notify_handler);
+
+/**
+ * wmi_uninstall_notify_handler - Unregister handler for WMI events
+ *
+ * Unregister handler for events sent to the ACPI-WMI mapper device.
+ */
+acpi_status wmi_remove_notify_handler(const char *guid)
+{
+        struct wmi_block *block;
+
+        if (!guid)
+                return AE_BAD_PARAMETER;
+
+        find_guid(guid, &block);
+        if (!block)
+                return AE_NOT_EXIST;
+
+        if (!block->handler)
+                return AE_NULL_ENTRY;
+
+        block->handler = NULL;
+        block->handler_data = NULL;
+
+        return AE_OK;
+}
+EXPORT_SYMBOL_GPL(wmi_remove_notify_handler);
+
+/**
+ * wmi_get_event_data - Get WMI data associated with an event
+ *
+ * @event - Event to find
+ * &out - Buffer to hold event data
+ *
+ * Returns extra data associated with an event in WMI.
+ */
+acpi_status wmi_get_event_data(u32 event, struct acpi_buffer *out)
+{
+        struct acpi_object_list input;
+        union acpi_object params[1];
+        struct guid_block *gblock;
+        struct wmi_block *wblock;
+        struct list_head *p;
+
+        input.count = 1;
+        input.pointer = params;
+        params[0].type = ACPI_TYPE_INTEGER;
+        params[0].integer.value = event;
+
+        list_for_each(p, &wmi_blocks.list) {
+                wblock = list_entry(p, struct wmi_block, list);
+                gblock = &wblock->gblock;
+
+                if ((gblock->flags & ACPI_WMI_EVENT) &&
+                        (gblock->notify_id == event))
+                        return acpi_evaluate_object(wblock->handle, "_WED",
+                                &input, out);
+        }
+
+        return AE_NOT_FOUND;
+}
+EXPORT_SYMBOL_GPL(wmi_get_event_data);
+
+/**
+ * wmi_has_guid - Check if a GUID is available
+ * @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba
+ *
+ * Check if a given GUID is defined by _WDG
+ */
+bool wmi_has_guid(const char *guid_string)
+{
+        return find_guid(guid_string, NULL);
+}
+EXPORT_SYMBOL_GPL(wmi_has_guid);
+
+/*
+ * Parse the _WDG method for the GUID data blocks
+ */
+static __init acpi_status parse_wdg(acpi_handle handle)
+{
+        struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
+        union acpi_object *obj;
+        struct guid_block *gblock;
+        struct wmi_block *wblock;
+        acpi_status status;
+        u32 i, total;
+
+        status = acpi_evaluate_object(handle, "_WDG", NULL, &out);
+
+        if (ACPI_FAILURE(status))
+                return status;
+
+        obj = (union acpi_object *) out.pointer;
+
+        if (obj->type != ACPI_TYPE_BUFFER)
+                return AE_ERROR;
+
+        total = obj->buffer.length / sizeof(struct guid_block);
+
+        gblock = kzalloc(obj->buffer.length, GFP_KERNEL);
+        if (!gblock)
+                return AE_NO_MEMORY;
+
+        memcpy(gblock, obj->buffer.pointer, obj->buffer.length);
+
+        for (i = 0; i < total; i++) {
+                wblock = kzalloc(sizeof(struct wmi_block), GFP_KERNEL);
+                if (!wblock)
+                        return AE_NO_MEMORY;
+
+                wblock->gblock = gblock[i];
+                wblock->handle = handle;
+                list_add_tail(&wblock->list, &wmi_blocks.list);
+        }
+
+        kfree(out.pointer);
+        kfree(gblock);
+
+        return status;
+}
+
+/*
+ * WMI can have EmbeddedControl access regions. In which case, we just want to
+ * hand these off to the EC driver.
+ */
+static acpi_status
+acpi_wmi_ec_space_handler(u32 function, acpi_physical_address address,
+                      u32 bits, acpi_integer * value,
+                      void *handler_context, void *region_context)
+{
+        int result = 0, i = 0;
+        u8 temp = 0;
+
+        if ((address > 0xFF) || !value)
+                return AE_BAD_PARAMETER;
+
+        if (function != ACPI_READ && function != ACPI_WRITE)
+                return AE_BAD_PARAMETER;
+
+        if (bits != 8)
+                return AE_BAD_PARAMETER;
+
+        if (function == ACPI_READ) {
+                result = ec_read(address, &temp);
+                (*value) |= ((acpi_integer)temp) << i;
+        } else {
+                temp = 0xff & ((*value) >> i);
+                result = ec_write(address, temp);
+        }
+
+        switch (result) {
+        case -EINVAL:
+                return AE_BAD_PARAMETER;
+                break;
+        case -ENODEV:
+                return AE_NOT_FOUND;
+                break;
+        case -ETIME:
+                return AE_TIME;
+                break;
+        default:
+                return AE_OK;
+        }
+}
+
+static void acpi_wmi_notify(acpi_handle handle, u32 event, void *data)
+{
+        struct guid_block *block;
+        struct wmi_block *wblock;
+        struct list_head *p;
+        struct acpi_device *device = data;
+
+        list_for_each(p, &wmi_blocks.list) {
+                wblock = list_entry(p, struct wmi_block, list);
+                block = &wblock->gblock;
+
+                if ((block->flags & ACPI_WMI_EVENT) &&
+                        (block->notify_id == event)) {
+                        if (wblock->handler)
+                                wblock->handler(event, wblock->handler_data);
+
+                        acpi_bus_generate_netlink_event(
+                                device->pnp.device_class, device->dev.bus_id,
+                                event, 0);
+                        break;
+                }
+        }
+}
+
+static int acpi_wmi_remove(struct acpi_device *device, int type)
+{
+        acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
+                acpi_wmi_notify);
+
+        acpi_remove_address_space_handler(device->handle,
+                                ACPI_ADR_SPACE_EC, &acpi_wmi_ec_space_handler);
+
+        return 0;
+}
+
+static int __init acpi_wmi_add(struct acpi_device *device)
+{
+        acpi_status status;
+        int result = 0;
+
+        status = acpi_install_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
+                acpi_wmi_notify, device);
+        if (ACPI_FAILURE(status)) {
+                printk(KERN_ERR PREFIX "Error installing notify handler\n");
+                return -ENODEV;
+        }
+
+        status = acpi_install_address_space_handler(device->handle,
+                                                    ACPI_ADR_SPACE_EC,
+                                                    &acpi_wmi_ec_space_handler,
+                                                    NULL, NULL);
+        if (ACPI_FAILURE(status))
+                return -ENODEV;
+
+        status = parse_wdg(device->handle);
+        if (ACPI_FAILURE(status)) {
+                printk(KERN_ERR PREFIX "Error installing EC region handler\n");
+                return -ENODEV;
+        }
+
+        return result;
+}
+
+static int __init acpi_wmi_init(void)
+{
+        acpi_status result;
+
+        if (acpi_disabled)
+                return -ENODEV;
+
+        INIT_LIST_HEAD(&wmi_blocks.list);
+
+        result = acpi_bus_register_driver(&acpi_wmi_driver);
+
+        if (result < 0) {
+                printk(KERN_INFO PREFIX "Error loading mapper\n");
+        } else {
+                printk(KERN_INFO PREFIX "Mapper loaded\n");
+        }
+
+        return result;
+}
+
+static void __exit acpi_wmi_exit(void)
+{
+        struct list_head *p, *tmp;
+        struct wmi_block *wblock;
+
+        acpi_bus_unregister_driver(&acpi_wmi_driver);
+
+        list_for_each_safe(p, tmp, &wmi_blocks.list) {
+                wblock = list_entry(p, struct wmi_block, list);
+
+                list_del(p);
+                kfree(wblock);
+        }
+
+        printk(KERN_INFO PREFIX "Mapper unloaded\n");
+}
+
+subsys_initcall(acpi_wmi_init);
+module_exit(acpi_wmi_exit);