8 files changed, 86 insertions, 54 deletions

diff --git a/drivers/acpi/acpi_lpss.c b/drivers/acpi/acpi_lpss.c
index 02e835f3cf8a..657964e8ab7e 100644
--- a/drivers/acpi/acpi_lpss.c
+++ b/drivers/acpi/acpi_lpss.c
@@ -105,7 +105,7 @@ static void lpss_uart_setup(struct lpss_private_data *pdata)
         }
 }
 
-static void byt_i2c_setup(struct lpss_private_data *pdata)
+static void lpss_deassert_reset(struct lpss_private_data *pdata)
 {
         unsigned int offset;
         u32 val;
@@ -114,9 +114,18 @@ static void byt_i2c_setup(struct lpss_private_data *pdata)
         val = readl(pdata->mmio_base + offset);
         val |= LPSS_RESETS_RESET_APB | LPSS_RESETS_RESET_FUNC;
         writel(val, pdata->mmio_base + offset);
+}
+
+#define LPSS_I2C_ENABLE                 0x6c
+
+static void byt_i2c_setup(struct lpss_private_data *pdata)
+{
+        lpss_deassert_reset(pdata);
 
         if (readl(pdata->mmio_base + pdata->dev_desc->prv_offset))
                 pdata->fixed_clk_rate = 133000000;
+
+        writel(0, pdata->mmio_base + LPSS_I2C_ENABLE);
 }
 
 static struct lpss_device_desc lpt_dev_desc = {
@@ -125,7 +134,7 @@ static struct lpss_device_desc lpt_dev_desc = {
 };
 
 static struct lpss_device_desc lpt_i2c_dev_desc = {
-        .flags = LPSS_CLK | LPSS_LTR,
+        .flags = LPSS_CLK | LPSS_CLK_GATE | LPSS_LTR,
         .prv_offset = 0x800,
 };
 
@@ -166,6 +175,12 @@ static struct lpss_device_desc byt_i2c_dev_desc = {
         .setup = byt_i2c_setup,
 };
 
+static struct lpss_device_desc bsw_spi_dev_desc = {
+        .flags = LPSS_CLK | LPSS_CLK_GATE | LPSS_CLK_DIVIDER | LPSS_SAVE_CTX,
+        .prv_offset = 0x400,
+        .setup = lpss_deassert_reset,
+};
+
 #else
 
 #define LPSS_ADDR(desc) (0UL)
@@ -198,7 +213,7 @@ static const struct acpi_device_id acpi_lpss_device_ids[] = {
         /* Braswell LPSS devices */
         { "80862288", LPSS_ADDR(byt_pwm_dev_desc) },
         { "8086228A", LPSS_ADDR(byt_uart_dev_desc) },
-        { "8086228E", LPSS_ADDR(byt_spi_dev_desc) },
+        { "8086228E", LPSS_ADDR(bsw_spi_dev_desc) },
         { "808622C1", LPSS_ADDR(byt_i2c_dev_desc) },
 
         { "INT3430", LPSS_ADDR(lpt_dev_desc) },
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 982b67faaaf3..a8dd2f763382 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -680,7 +680,7 @@ static void acpi_ec_start(struct acpi_ec *ec, bool resuming)
                 /* Enable GPE for event processing (SCI_EVT=1) */
                 if (!resuming)
                         acpi_ec_submit_request(ec);
-                pr_info("+++++ EC started +++++\n");
+                pr_debug("EC started\n");
         }
         spin_unlock_irqrestore(&ec->lock, flags);
 }
@@ -712,7 +712,7 @@ static void acpi_ec_stop(struct acpi_ec *ec, bool suspending)
                         acpi_ec_complete_request(ec);
                 clear_bit(EC_FLAGS_STARTED, &ec->flags);
                 clear_bit(EC_FLAGS_STOPPED, &ec->flags);
-                pr_info("+++++ EC stopped +++++\n");
+                pr_debug("EC stopped\n");
         }
         spin_unlock_irqrestore(&ec->lock, flags);
 }
diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
index 4752b9939987..c723668e3e27 100644
--- a/drivers/acpi/resource.c
+++ b/drivers/acpi/resource.c
@@ -46,7 +46,7 @@ static bool acpi_dev_resource_len_valid(u64 start, u64 end, u64 len, bool io)
         if (len && reslen && reslen == len && start <= end)
                 return true;
 
-        pr_info("ACPI: invalid or unassigned resource %s [%016llx - %016llx] length [%016llx]\n",
+        pr_debug("ACPI: invalid or unassigned resource %s [%016llx - %016llx] length [%016llx]\n",
                 io ? "io" : "mem", start, end, len);
 
         return false;
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 88a4f99dd2a7..debd30917010 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -540,6 +540,15 @@ static struct dmi_system_id video_dmi_table[] __initdata = {
                 DMI_MATCH(DMI_PRODUCT_NAME, "730U3E/740U3E"),
                 },
         },
+        {
+         /* https://bugs.freedesktop.org/show_bug.cgi?id=87286 */
+         .callback = video_disable_native_backlight,
+         .ident = "SAMSUNG 900X3C/900X3D/900X3E/900X4C/900X4D",
+         .matches = {
+                DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
+                DMI_MATCH(DMI_PRODUCT_NAME, "900X3C/900X3D/900X3E/900X4C/900X4D"),
+                },
+        },
 
         {
          /* https://bugzilla.redhat.com/show_bug.cgi?id=1163574 */
diff --git a/drivers/cpufreq/s3c2416-cpufreq.c b/drivers/cpufreq/s3c2416-cpufreq.c
index 2fd53eaaec20..d6d425773fa4 100644
--- a/drivers/cpufreq/s3c2416-cpufreq.c
+++ b/drivers/cpufreq/s3c2416-cpufreq.c
@@ -263,7 +263,7 @@ out:
 }
 
 #ifdef CONFIG_ARM_S3C2416_CPUFREQ_VCORESCALE
-static void __init s3c2416_cpufreq_cfg_regulator(struct s3c2416_data *s3c_freq)
+static void s3c2416_cpufreq_cfg_regulator(struct s3c2416_data *s3c_freq)
 {
         int count, v, i, found;
         struct cpufreq_frequency_table *pos;
@@ -333,7 +333,7 @@ static struct notifier_block s3c2416_cpufreq_reboot_notifier = {
         .notifier_call = s3c2416_cpufreq_reboot_notifier_evt,
 };
 
-static int __init s3c2416_cpufreq_driver_init(struct cpufreq_policy *policy)
+static int s3c2416_cpufreq_driver_init(struct cpufreq_policy *policy)
 {
         struct s3c2416_data *s3c_freq = &s3c2416_cpufreq;
         struct cpufreq_frequency_table *pos;
diff --git a/drivers/cpufreq/s3c24xx-cpufreq.c b/drivers/cpufreq/s3c24xx-cpufreq.c
index d00f1cee4509..733aa5153e74 100644
--- a/drivers/cpufreq/s3c24xx-cpufreq.c
+++ b/drivers/cpufreq/s3c24xx-cpufreq.c
@@ -144,11 +144,6 @@ static void s3c_cpufreq_setfvco(struct s3c_cpufreq_config *cfg)
         (cfg->info->set_fvco)(cfg);
 }
 
-static inline void s3c_cpufreq_resume_clocks(void)
-{
-        cpu_cur.info->resume_clocks();
-}
-
 static inline void s3c_cpufreq_updateclk(struct clk *clk,
                                          unsigned int freq)
 {
@@ -417,9 +412,6 @@ static int s3c_cpufreq_resume(struct cpufreq_policy *policy)
 
         last_target = ~0;       /* invalidate last_target setting */
 
-        /* first, find out what speed we resumed at. */
-        s3c_cpufreq_resume_clocks();
-
         /* whilst we will be called later on, we try and re-set the
          * cpu frequencies as soon as possible so that we do not end
          * up resuming devices and then immediately having to re-set
@@ -454,7 +446,7 @@ static struct cpufreq_driver s3c24xx_driver = {
 };
 
 
-int __init s3c_cpufreq_register(struct s3c_cpufreq_info *info)
+int s3c_cpufreq_register(struct s3c_cpufreq_info *info)
 {
         if (!info || !info->name) {
                 printk(KERN_ERR "%s: failed to pass valid information\n",
diff --git a/drivers/cpuidle/cpuidle-powernv.c b/drivers/cpuidle/cpuidle-powernv.c
index aedec0957934..59372077ec7c 100644
--- a/drivers/cpuidle/cpuidle-powernv.c
+++ b/drivers/cpuidle/cpuidle-powernv.c
@@ -13,6 +13,7 @@
 #include <linux/notifier.h>
 #include <linux/clockchips.h>
 #include <linux/of.h>
+#include <linux/slab.h>
 
 #include <asm/machdep.h>
 #include <asm/firmware.h>
@@ -158,70 +159,83 @@ static int powernv_add_idle_states(void)
         struct device_node *power_mgt;
         int nr_idle_states = 1; /* Snooze */
         int dt_idle_states;
-        const __be32 *idle_state_flags;
-        const __be32 *idle_state_latency;
-        u32 len_flags, flags, latency_ns;
-        int i;
+        u32 *latency_ns, *residency_ns, *flags;
+        int i, rc;
 
         /* Currently we have snooze statically defined */
 
         power_mgt = of_find_node_by_path("/ibm,opal/power-mgt");
         if (!power_mgt) {
                 pr_warn("opal: PowerMgmt Node not found\n");
-                return nr_idle_states;
+                goto out;
         }
 
-        idle_state_flags = of_get_property(power_mgt, "ibm,cpu-idle-state-flags", &len_flags);
-        if (!idle_state_flags) {
-                pr_warn("DT-PowerMgmt: missing ibm,cpu-idle-state-flags\n");
-                return nr_idle_states;
+        /* Read values of any property to determine the num of idle states */
+        dt_idle_states = of_property_count_u32_elems(power_mgt, "ibm,cpu-idle-state-flags");
+        if (dt_idle_states < 0) {
+                pr_warn("cpuidle-powernv: no idle states found in the DT\n");
+                goto out;
         }
 
-        idle_state_latency = of_get_property(power_mgt,
-                        "ibm,cpu-idle-state-latencies-ns", NULL);
-        if (!idle_state_latency) {
-                pr_warn("DT-PowerMgmt: missing ibm,cpu-idle-state-latencies-ns\n");
-                return nr_idle_states;
+        flags = kzalloc(sizeof(*flags) * dt_idle_states, GFP_KERNEL);
+        if (of_property_read_u32_array(power_mgt,
+                        "ibm,cpu-idle-state-flags", flags, dt_idle_states)) {
+                pr_warn("cpuidle-powernv : missing ibm,cpu-idle-state-flags in DT\n");
+                goto out_free_flags;
         }
 
-        dt_idle_states = len_flags / sizeof(u32);
+        latency_ns = kzalloc(sizeof(*latency_ns) * dt_idle_states, GFP_KERNEL);
+        rc = of_property_read_u32_array(power_mgt,
+                "ibm,cpu-idle-state-latencies-ns", latency_ns, dt_idle_states);
+        if (rc) {
+                pr_warn("cpuidle-powernv: missing ibm,cpu-idle-state-latencies-ns in DT\n");
+                goto out_free_latency;
+        }
 
-        for (i = 0; i < dt_idle_states; i++) {
+        residency_ns = kzalloc(sizeof(*residency_ns) * dt_idle_states, GFP_KERNEL);
+        rc = of_property_read_u32_array(power_mgt,
+                "ibm,cpu-idle-state-residency-ns", residency_ns, dt_idle_states);
 
-                flags = be32_to_cpu(idle_state_flags[i]);
+        for (i = 0; i < dt_idle_states; i++) {
 
-                /* Cpuidle accepts exit_latency in us and we estimate
-                 * target residency to be 10x exit_latency
+                /*
+                 * Cpuidle accepts exit_latency and target_residency in us.
+                 * Use default target_residency values if f/w does not expose it.
                  */
-                latency_ns = be32_to_cpu(idle_state_latency[i]);
-                if (flags & OPAL_PM_NAP_ENABLED) {
+                if (flags[i] & OPAL_PM_NAP_ENABLED) {
                         /* Add NAP state */
                         strcpy(powernv_states[nr_idle_states].name, "Nap");
                         strcpy(powernv_states[nr_idle_states].desc, "Nap");
                         powernv_states[nr_idle_states].flags = 0;
-                        powernv_states[nr_idle_states].exit_latency =
-                                        ((unsigned int)latency_ns) / 1000;
-                        powernv_states[nr_idle_states].target_residency =
-                                        ((unsigned int)latency_ns / 100);
+                        powernv_states[nr_idle_states].target_residency = 100;
                         powernv_states[nr_idle_states].enter = &nap_loop;
-                        nr_idle_states++;
-                }
-
-                if (flags & OPAL_PM_SLEEP_ENABLED ||
-                        flags & OPAL_PM_SLEEP_ENABLED_ER1) {
+                } else if (flags[i] & OPAL_PM_SLEEP_ENABLED ||
+                        flags[i] & OPAL_PM_SLEEP_ENABLED_ER1) {
                         /* Add FASTSLEEP state */
                         strcpy(powernv_states[nr_idle_states].name, "FastSleep");
                         strcpy(powernv_states[nr_idle_states].desc, "FastSleep");
                         powernv_states[nr_idle_states].flags = CPUIDLE_FLAG_TIMER_STOP;
-                        powernv_states[nr_idle_states].exit_latency =
-                                        ((unsigned int)latency_ns) / 1000;
-                        powernv_states[nr_idle_states].target_residency =
-                                        ((unsigned int)latency_ns / 100);
+                        powernv_states[nr_idle_states].target_residency = 300000;
                         powernv_states[nr_idle_states].enter = &fastsleep_loop;
-                        nr_idle_states++;
                 }
+
+                powernv_states[nr_idle_states].exit_latency =
+                                ((unsigned int)latency_ns[i]) / 1000;
+
+                if (!rc) {
+                        powernv_states[nr_idle_states].target_residency =
+                                ((unsigned int)residency_ns[i]) / 1000;
+                }
+
+                nr_idle_states++;
         }
 
+        kfree(residency_ns);
+out_free_latency:
+        kfree(latency_ns);
+out_free_flags:
+        kfree(flags);
+out:
         return nr_idle_states;
 }
 
diff --git a/drivers/pnp/resource.c b/drivers/pnp/resource.c
index 782e82289571..f980ff7166e9 100644
--- a/drivers/pnp/resource.c
+++ b/drivers/pnp/resource.c
@@ -179,8 +179,9 @@ int pnp_check_port(struct pnp_dev *dev, struct resource *res)
         /* check if the resource is already in use, skip if the
          * device is active because it itself may be in use */
         if (!dev->active) {
-                if (__check_region(&ioport_resource, *port, length(port, end)))
+                if (!request_region(*port, length(port, end), "pnp"))
                         return 0;
+                release_region(*port, length(port, end));
         }
 
         /* check if the resource is reserved */
@@ -241,8 +242,9 @@ int pnp_check_mem(struct pnp_dev *dev, struct resource *res)
         /* check if the resource is already in use, skip if the
          * device is active because it itself may be in use */
         if (!dev->active) {
-                if (check_mem_region(*addr, length(addr, end)))
+                if (!request_mem_region(*addr, length(addr, end), "pnp"))
                         return 0;
+                release_mem_region(*addr, length(addr, end));
         }
 
         /* check if the resource is reserved */