Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux

Pull ACPI & Thermal updates from Len Brown:
 "The generic Linux thermal layer is gaining some new capabilities
  (generic cooling via cpufreq) and some new customers (ARM).

  Also, an ACPI EC bug fix plus a regression fix."

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux: (30 commits)
  tools/power/acpi/acpidump: remove duplicated include from acpidump.c
  ACPI idle, CPU hotplug: Fix NULL pointer dereference during hotplug
  cpuidle / ACPI: fix potential NULL pointer dereference
  ACPI: EC: Add a quirk for CLEVO M720T/M730T laptop
  ACPI: EC: Make the GPE storm threshold a module parameter
  thermal: Exynos: Fix NULL pointer dereference in exynos_unregister_thermal()
  Thermal: Fix bug on cpu_cooling, cooling device's id conflict problem.
  thermal: exynos: Use devm_* functions
  ARM: exynos: add thermal sensor driver platform data support
  thermal: exynos: register the tmu sensor with the kernel thermal layer
  thermal: exynos5: add exynos5250 thermal sensor driver support
  hwmon: exynos4: move thermal sensor driver to driver/thermal directory
  thermal: add generic cpufreq cooling implementation
  Fix a build error.
  thermal: Fix potential NULL pointer accesses
  thermal: add Renesas R-Car thermal sensor support
  thermal: fix potential out-of-bounds memory access
  Thermal: Introduce locking for cdev.thermal_instances list.
  Thermal: Unify the code for both active and passive cooling
  Thermal: Introduce simple arbitrator for setting device cooling state
  ...

Documentation/thermal/cpu-cooling-api.txt

+CPU cooling APIs How To
+===================================
+
+Written by Amit Daniel Kachhap <amit.kachhap@linaro.org>
+
+Updated: 12 May 2012
+
+Copyright (c)  2012 Samsung Electronics Co., Ltd(http://www.samsung.com)
+
+0. Introduction
+
+The generic cpu cooling(freq clipping) provides registration/unregistration APIs
+to the caller. The binding of the cooling devices to the trip point is left for
+the user. The registration APIs returns the cooling device pointer.
+
+1. cpu cooling APIs
+
+1.1 cpufreq registration/unregistration APIs
+1.1.1 struct thermal_cooling_device *cpufreq_cooling_register(
+	struct cpumask *clip_cpus)
+
+    This interface function registers the cpufreq cooling device with the name
+    "thermal-cpufreq-%x". This api can support multiple instances of cpufreq
+    cooling devices.
+
+   clip_cpus: cpumask of cpus where the frequency constraints will happen.
+
+1.1.2 void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev)
+
+    This interface function unregisters the "thermal-cpufreq-%x" cooling device.
+
+    cdev: Cooling device pointer which has to be unregistered.

Documentation/hwmon/exynos4_tmu → Documentation/thermal/exynos_thermal

@@ -46,36 +46,7 @@ The threshold levels are defined as follows:
   The threshold and each trigger_level are set
   through the corresponding registers.
 
-When an interrupt occurs, this driver notify user space of
-one of four threshold levels for the interrupt
-through kobject_uevent_env and sysfs_notify functions.
+When an interrupt occurs, this driver notify kernel thermal framework
+with the function exynos4_report_trigger.
 Although an interrupt condition for level_0 can be set,
-it is not notified to user space through sysfs_notify function.
-
-Sysfs Interface
----------------
-name		name of the temperature sensor
-		RO
-
-temp1_input	temperature
-		RO
-
-temp1_max	temperature for level_1 interrupt
-		RO
-
-temp1_crit	temperature for level_2 interrupt
-		RO
-
-temp1_emergency	temperature for level_3 interrupt
-		RO
-
-temp1_max_alarm	alarm for level_1 interrupt
-		RO
-
-temp1_crit_alarm
-		alarm for level_2 interrupt
-		RO
-
-temp1_emergency_alarm
-		alarm for level_3 interrupt
-		RO
+it can be used to synchronize the cooling action.

Documentation/thermal/sysfs-api.txt

@@ -84,7 +84,8 @@ temperature) and throttle appropriate devices.
 
 1.3 interface for binding a thermal zone device with a thermal cooling device
 1.3.1 int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz,
-		int trip, struct thermal_cooling_device *cdev);
+	int trip, struct thermal_cooling_device *cdev,
+	unsigned long upper, unsigned long lower);
 
     This interface function bind a thermal cooling device to the certain trip
     point of a thermal zone device.
@@ -93,6 +94,12 @@ temperature) and throttle appropriate devices.
     cdev: thermal cooling device
     trip: indicates which trip point the cooling devices is associated with
 	  in this thermal zone.
+    upper:the Maximum cooling state for this trip point.
+          THERMAL_NO_LIMIT means no upper limit,
+	  and the cooling device can be in max_state.
+    lower:the Minimum cooling state can be used for this trip point.
+          THERMAL_NO_LIMIT means no lower limit,
+	  and the cooling device can be in cooling state 0.
 
 1.3.2 int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz,
 		int trip, struct thermal_cooling_device *cdev);

drivers/acpi/ec.c

@@ -71,9 +71,6 @@ enum ec_command {
 #define ACPI_EC_UDELAY_GLK	1000	/* Wait 1ms max. to get global lock */
 #define ACPI_EC_MSI_UDELAY	550	/* Wait 550us for MSI EC */
 
-#define ACPI_EC_STORM_THRESHOLD 8	/* number of false interrupts
-					   per one transaction */
-
 enum {
 	EC_FLAGS_QUERY_PENDING,		/* Query is pending */
 	EC_FLAGS_GPE_STORM,		/* GPE storm detected */
@@ -87,6 +84,15 @@ static unsigned int ec_delay __read_mostly = ACPI_EC_DELAY;
 module_param(ec_delay, uint, 0644);
 MODULE_PARM_DESC(ec_delay, "Timeout(ms) waited until an EC command completes");
 
+/*
+ * If the number of false interrupts per one transaction exceeds
+ * this threshold, will think there is a GPE storm happened and
+ * will disable the GPE for normal transaction.
+ */
+static unsigned int ec_storm_threshold  __read_mostly = 8;
+module_param(ec_storm_threshold, uint, 0644);
+MODULE_PARM_DESC(ec_storm_threshold, "Maxim false GPE numbers not considered as GPE storm");
+
 /* If we find an EC via the ECDT, we need to keep a ptr to its context */
 /* External interfaces use first EC only, so remember */
 typedef int (*acpi_ec_query_func) (void *data);
@@ -319,7 +325,7 @@ static int acpi_ec_transaction(struct acpi_ec *ec, struct transaction *t)
 		msleep(1);
 		/* It is safe to enable the GPE outside of the transaction. */
 		acpi_enable_gpe(NULL, ec->gpe);
-	} else if (t->irq_count > ACPI_EC_STORM_THRESHOLD) {
+	} else if (t->irq_count > ec_storm_threshold) {
 		pr_info(PREFIX "GPE storm detected, "
 			"transactions will use polling mode\n");
 		set_bit(EC_FLAGS_GPE_STORM, &ec->flags);
@@ -924,6 +930,17 @@ static int ec_flag_msi(const struct dmi_system_id *id)
 	return 0;
 }
 
+/*
+ * Clevo M720 notebook actually works ok with IRQ mode, if we lifted
+ * the GPE storm threshold back to 20
+ */
+static int ec_enlarge_storm_threshold(const struct dmi_system_id *id)
+{
+	pr_debug("Setting the EC GPE storm threshold to 20\n");
+	ec_storm_threshold  = 20;
+	return 0;
+}
+
 static struct dmi_system_id __initdata ec_dmi_table[] = {
 	{
 	ec_skip_dsdt_scan, "Compal JFL92", {
@@ -955,10 +972,13 @@ static struct dmi_system_id __initdata ec_dmi_table[] = {
 	{
 	ec_validate_ecdt, "ASUS hardware", {
 	DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer Inc.") }, NULL},
+	{
+	ec_enlarge_storm_threshold, "CLEVO hardware", {
+	DMI_MATCH(DMI_SYS_VENDOR, "CLEVO Co."),
+	DMI_MATCH(DMI_PRODUCT_NAME, "M720T/M730T"),}, NULL},
 	{},
 };
 
-
 int __init acpi_ec_ecdt_probe(void)
 {
 	acpi_status status;

drivers/acpi/processor_idle.c

@@ -1132,7 +1132,7 @@ static int acpi_processor_setup_cpuidle_states(struct acpi_processor *pr)
 int acpi_processor_hotplug(struct acpi_processor *pr)
 {
 	int ret = 0;
-	struct cpuidle_device *dev = per_cpu(acpi_cpuidle_device, pr->id);
+	struct cpuidle_device *dev;
 
 	if (disabled_by_idle_boot_param())
 		return 0;
@@ -1147,6 +1147,7 @@ int acpi_processor_hotplug(struct acpi_processor *pr)
 	if (!pr->flags.power_setup_done)
 		return -ENODEV;
 
+	dev = per_cpu(acpi_cpuidle_device, pr->id);
 	cpuidle_pause_and_lock();
 	cpuidle_disable_device(dev);
 	acpi_processor_get_power_info(pr);

drivers/acpi/thermal.c

@@ -708,6 +708,40 @@ static int thermal_get_crit_temp(struct thermal_zone_device *thermal,
 		return -EINVAL;
 }
 
+static int thermal_get_trend(struct thermal_zone_device *thermal,
+				int trip, enum thermal_trend *trend)
+{
+	struct acpi_thermal *tz = thermal->devdata;
+	enum thermal_trip_type type;
+	int i;
+
+	if (thermal_get_trip_type(thermal, trip, &type))
+		return -EINVAL;
+
+	if (type == THERMAL_TRIP_ACTIVE) {
+		/* aggressive active cooling */
+		*trend = THERMAL_TREND_RAISING;
+		return 0;
+	}
+
+	/*
+	 * tz->temperature has already been updated by generic thermal layer,
+	 * before this callback being invoked
+	 */
+	i = (tz->trips.passive.tc1 * (tz->temperature - tz->last_temperature))
+		+ (tz->trips.passive.tc2
+		* (tz->temperature - tz->trips.passive.temperature));
+
+	if (i > 0)
+		*trend = THERMAL_TREND_RAISING;
+	else if (i < 0)
+		*trend = THERMAL_TREND_DROPPING;
+	else
+		*trend = THERMAL_TREND_STABLE;
+	return 0;
+}
+
+
 static int thermal_notify(struct thermal_zone_device *thermal, int trip,
 			   enum thermal_trip_type trip_type)
 {
@@ -731,11 +765,9 @@ static int thermal_notify(struct thermal_zone_device *thermal, int trip,
 	return 0;
 }
 
-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)
+					bool bind)
 {
 	struct acpi_device *device = cdev->devdata;
 	struct acpi_thermal *tz = thermal->devdata;
@@ -759,13 +791,21 @@ static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal,
 		    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 (ACPI_FAILURE(status) || dev != device)
+				continue;
+			if (bind)
+				result =
+					thermal_zone_bind_cooling_device
+					(thermal, trip, cdev,
+					 THERMAL_NO_LIMIT, THERMAL_NO_LIMIT);
+			else
+				result =
+					thermal_zone_unbind_cooling_device
+					(thermal, trip, cdev);
 			if (result)
 				goto failed;
 		}
 	}
-	}
 
 	for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
 		if (!tz->trips.active[i].flags.valid)
@@ -776,19 +816,32 @@ static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal,
 		    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 (ACPI_FAILURE(status) || dev != device)
+				continue;
+			if (bind)
+				result = thermal_zone_bind_cooling_device
+					(thermal, trip, cdev,
+					 THERMAL_NO_LIMIT, THERMAL_NO_LIMIT);
+			else
+				result = thermal_zone_unbind_cooling_device
+					(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 (bind)
+				result = thermal_zone_bind_cooling_device
+						(thermal, -1, cdev,
+						 THERMAL_NO_LIMIT,
+						 THERMAL_NO_LIMIT);
+			else
+				result = thermal_zone_unbind_cooling_device
+						(thermal, -1, cdev);
 			if (result)
 				goto failed;
 		}
@@ -802,16 +855,14 @@ 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);
+	return acpi_thermal_cooling_device_cb(thermal, cdev, true);
 }
 
 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);
+	return acpi_thermal_cooling_device_cb(thermal, cdev, false);
 }
 
 static const struct thermal_zone_device_ops acpi_thermal_zone_ops = {
@@ -823,6 +874,7 @@ static const struct thermal_zone_device_ops acpi_thermal_zone_ops = {
 	.get_trip_type = thermal_get_trip_type,
 	.get_trip_temp = thermal_get_trip_temp,
 	.get_crit_temp = thermal_get_crit_temp,
+	.get_trend = thermal_get_trend,
 	.notify = thermal_notify,
 };
 
@@ -849,15 +901,12 @@ static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
 		tz->thermal_zone =
 			thermal_zone_device_register("acpitz", trips, 0, tz,
 						     &acpi_thermal_zone_ops,
-						     tz->trips.passive.tc1,
-						     tz->trips.passive.tc2,
 						     tz->trips.passive.tsp*100,
 						     tz->polling_frequency*100);
 	else
 		tz->thermal_zone =
 			thermal_zone_device_register("acpitz", trips, 0, tz,
-						     &acpi_thermal_zone_ops,
-						     0, 0, 0,
+						     &acpi_thermal_zone_ops, 0,
 						     tz->polling_frequency*100);
 	if (IS_ERR(tz->thermal_zone))
 		return -ENODEV;

drivers/cpuidle/cpuidle.c

@@ -368,7 +368,7 @@ EXPORT_SYMBOL_GPL(cpuidle_enable_device);
  */
 void cpuidle_disable_device(struct cpuidle_device *dev)
 {
-	if (!dev->enabled)
+	if (!dev || !dev->enabled)
 		return;
 	if (!cpuidle_get_driver() || !cpuidle_curr_governor)
 		return;

drivers/hwmon/Kconfig

@@ -334,16 +334,6 @@ config SENSORS_DA9052_ADC
 	  This driver can also be built as module. If so, the module
 	  will be called da9052-hwmon.
 
-config SENSORS_EXYNOS4_TMU
-	tristate "Temperature sensor on Samsung EXYNOS4"
-	depends on ARCH_EXYNOS4
-	help
-	  If you say yes here you get support for TMU (Thermal Management
-	  Unit) on SAMSUNG EXYNOS4 series of SoC.
-
-	  This driver can also be built as a module. If so, the module
-	  will be called exynos4-tmu.
-
 config SENSORS_I5K_AMB
 	tristate "FB-DIMM AMB temperature sensor on Intel 5000 series chipsets"
 	depends on PCI

drivers/hwmon/Makefile

@@ -50,7 +50,6 @@ obj-$(CONFIG_SENSORS_DS1621)	+= ds1621.o
 obj-$(CONFIG_SENSORS_EMC1403)	+= emc1403.o
 obj-$(CONFIG_SENSORS_EMC2103)	+= emc2103.o
 obj-$(CONFIG_SENSORS_EMC6W201)	+= emc6w201.o
-obj-$(CONFIG_SENSORS_EXYNOS4_TMU)	+= exynos4_tmu.o
 obj-$(CONFIG_SENSORS_F71805F)	+= f71805f.o
 obj-$(CONFIG_SENSORS_F71882FG)	+= f71882fg.o
 obj-$(CONFIG_SENSORS_F75375S)	+= f75375s.o

drivers/hwmon/exynos4_tmu.c

-/*
- * exynos4_tmu.c - Samsung EXYNOS4 TMU (Thermal Management Unit)
- *
- *  Copyright (C) 2011 Samsung Electronics
- *  Donggeun Kim <dg77.kim@samsung.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/module.h>
-#include <linux/err.h>
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/platform_device.h>
-#include <linux/interrupt.h>
-#include <linux/clk.h>
-#include <linux/workqueue.h>
-#include <linux/sysfs.h>
-#include <linux/kobject.h>
-#include <linux/io.h>
-#include <linux/mutex.h>
-
-#include <linux/hwmon.h>
-#include <linux/hwmon-sysfs.h>
-
-#include <linux/platform_data/exynos4_tmu.h>
-
-#define EXYNOS4_TMU_REG_TRIMINFO	0x0
-#define EXYNOS4_TMU_REG_CONTROL		0x20
-#define EXYNOS4_TMU_REG_STATUS		0x28
-#define EXYNOS4_TMU_REG_CURRENT_TEMP	0x40
-#define EXYNOS4_TMU_REG_THRESHOLD_TEMP	0x44
-#define EXYNOS4_TMU_REG_TRIG_LEVEL0	0x50
-#define EXYNOS4_TMU_REG_TRIG_LEVEL1	0x54
-#define EXYNOS4_TMU_REG_TRIG_LEVEL2	0x58
-#define EXYNOS4_TMU_REG_TRIG_LEVEL3	0x5C
-#define EXYNOS4_TMU_REG_PAST_TEMP0	0x60
-#define EXYNOS4_TMU_REG_PAST_TEMP1	0x64
-#define EXYNOS4_TMU_REG_PAST_TEMP2	0x68
-#define EXYNOS4_TMU_REG_PAST_TEMP3	0x6C
-#define EXYNOS4_TMU_REG_INTEN		0x70
-#define EXYNOS4_TMU_REG_INTSTAT		0x74
-#define EXYNOS4_TMU_REG_INTCLEAR	0x78
-
-#define EXYNOS4_TMU_GAIN_SHIFT		8
-#define EXYNOS4_TMU_REF_VOLTAGE_SHIFT	24
-
-#define EXYNOS4_TMU_TRIM_TEMP_MASK	0xff
-#define EXYNOS4_TMU_CORE_ON	3
-#define EXYNOS4_TMU_CORE_OFF	2
-#define EXYNOS4_TMU_DEF_CODE_TO_TEMP_OFFSET	50
-#define EXYNOS4_TMU_TRIG_LEVEL0_MASK	0x1
-#define EXYNOS4_TMU_TRIG_LEVEL1_MASK	0x10
-#define EXYNOS4_TMU_TRIG_LEVEL2_MASK	0x100
-#define EXYNOS4_TMU_TRIG_LEVEL3_MASK	0x1000
-#define EXYNOS4_TMU_INTCLEAR_VAL	0x1111
-
-struct exynos4_tmu_data {
-	struct exynos4_tmu_platform_data *pdata;
-	struct device *hwmon_dev;
-	struct resource *mem;
-	void __iomem *base;
-	int irq;
-	struct work_struct irq_work;
-	struct mutex lock;
-	struct clk *clk;
-	u8 temp_error1, temp_error2;
-};
-
-/*
- * TMU treats temperature as a mapped temperature code.
- * The temperature is converted differently depending on the calibration type.
- */
-static int temp_to_code(struct exynos4_tmu_data *data, u8 temp)
-{
-	struct exynos4_tmu_platform_data *pdata = data->pdata;
-	int temp_code;
-
-	/* temp should range between 25 and 125 */
-	if (temp < 25 || temp > 125) {
-		temp_code = -EINVAL;
-		goto out;
-	}
-
-	switch (pdata->cal_type) {
-	case TYPE_TWO_POINT_TRIMMING:
-		temp_code = (temp - 25) *
-		    (data->temp_error2 - data->temp_error1) /
-		    (85 - 25) + data->temp_error1;
-		break;
-	case TYPE_ONE_POINT_TRIMMING:
-		temp_code = temp + data->temp_error1 - 25;
-		break;
-	default:
-		temp_code = temp + EXYNOS4_TMU_DEF_CODE_TO_TEMP_OFFSET;
-		break;
-	}
-out:
-	return temp_code;
-}
-
-/*
- * Calculate a temperature value from a temperature code.
- * The unit of the temperature is degree Celsius.
- */
-static int code_to_temp(struct exynos4_tmu_data *data, u8 temp_code)
-{
-	struct exynos4_tmu_platform_data *pdata = data->pdata;
-	int temp;
-
-	/* temp_code should range between 75 and 175 */
-	if (temp_code < 75 || temp_code > 175) {
-		temp = -ENODATA;
-		goto out;
-	}
-
-	switch (pdata->cal_type) {
-	case TYPE_TWO_POINT_TRIMMING:
-		temp = (temp_code - data->temp_error1) * (85 - 25) /
-		    (data->temp_error2 - data->temp_error1) + 25;
-		break;
-	case TYPE_ONE_POINT_TRIMMING:
-		temp = temp_code - data->temp_error1 + 25;
-		break;
-	default:
-		temp = temp_code - EXYNOS4_TMU_DEF_CODE_TO_TEMP_OFFSET;
-		break;
-	}
-out:
-	return temp;
-}
-
-static int exynos4_tmu_initialize(struct platform_device *pdev)
-{
-	struct exynos4_tmu_data *data = platform_get_drvdata(pdev);
-	struct exynos4_tmu_platform_data *pdata = data->pdata;
-	unsigned int status, trim_info;
-	int ret = 0, threshold_code;
-
-	mutex_lock(&data->lock);
-	clk_enable(data->clk);
-
-	status = readb(data->base + EXYNOS4_TMU_REG_STATUS);
-	if (!status) {
-		ret = -EBUSY;
-		goto out;
-	}
-
-	/* Save trimming info in order to perform calibration */
-	trim_info = readl(data->base + EXYNOS4_TMU_REG_TRIMINFO);
-	data->temp_error1 = trim_info & EXYNOS4_TMU_TRIM_TEMP_MASK;
-	data->temp_error2 = ((trim_info >> 8) & EXYNOS4_TMU_TRIM_TEMP_MASK);
-
-	/* Write temperature code for threshold */
-	threshold_code = temp_to_code(data, pdata->threshold);
-	if (threshold_code < 0) {
-		ret = threshold_code;
-		goto out;
-	}
-	writeb(threshold_code,
-		data->base + EXYNOS4_TMU_REG_THRESHOLD_TEMP);
-
-	writeb(pdata->trigger_levels[0],
-		data->base + EXYNOS4_TMU_REG_TRIG_LEVEL0);
-	writeb(pdata->trigger_levels[1],
-		data->base + EXYNOS4_TMU_REG_TRIG_LEVEL1);
-	writeb(pdata->trigger_levels[2],
-		data->base + EXYNOS4_TMU_REG_TRIG_LEVEL2);
-	writeb(pdata->trigger_levels[3],
-		data->base + EXYNOS4_TMU_REG_TRIG_LEVEL3);
-
-	writel(EXYNOS4_TMU_INTCLEAR_VAL,
-		data->base + EXYNOS4_TMU_REG_INTCLEAR);
-out:
-	clk_disable(data->clk);
-	mutex_unlock(&data->lock);
-
-	return ret;
-}
-
-static void exynos4_tmu_control(struct platform_device *pdev, bool on)
-{
-	struct exynos4_tmu_data *data = platform_get_drvdata(pdev);
-	struct exynos4_tmu_platform_data *pdata = data->pdata;
-	unsigned int con, interrupt_en;
-
-	mutex_lock(&data->lock);
-	clk_enable(data->clk);
-
-	con = pdata->reference_voltage << EXYNOS4_TMU_REF_VOLTAGE_SHIFT |
-		pdata->gain << EXYNOS4_TMU_GAIN_SHIFT;
-	if (on) {
-		con |= EXYNOS4_TMU_CORE_ON;
-		interrupt_en = pdata->trigger_level3_en << 12 |
-			pdata->trigger_level2_en << 8 |
-			pdata->trigger_level1_en << 4 |
-			pdata->trigger_level0_en;
-	} else {
-		con |= EXYNOS4_TMU_CORE_OFF;
-		interrupt_en = 0; /* Disable all interrupts */
-	}
-	writel(interrupt_en, data->base + EXYNOS4_TMU_REG_INTEN);
-	writel(con, data->base + EXYNOS4_TMU_REG_CONTROL);
-
-	clk_disable(data->clk);
-	mutex_unlock(&data->lock);
-}
-
-static int exynos4_tmu_read(struct exynos4_tmu_data *data)
-{
-	u8 temp_code;
-	int temp;
-
-	mutex_lock(&data->lock);
-	clk_enable(data->clk);
-
-	temp_code = readb(data->base + EXYNOS4_TMU_REG_CURRENT_TEMP);
-	temp = code_to_temp(data, temp_code);
-
-	clk_disable(data->clk);
-	mutex_unlock(&data->lock);
-
-	return temp;
-}
-
-static void exynos4_tmu_work(struct work_struct *work)
-{
-	struct exynos4_tmu_data *data = container_of(work,
-			struct exynos4_tmu_data, irq_work);
-
-	mutex_lock(&data->lock);
-	clk_enable(data->clk);
-
-	writel(EXYNOS4_TMU_INTCLEAR_VAL, data->base + EXYNOS4_TMU_REG_INTCLEAR);
-
-	kobject_uevent(&data->hwmon_dev->kobj, KOBJ_CHANGE);
-
-	enable_irq(data->irq);
-
-	clk_disable(data->clk);
-	mutex_unlock(&data->lock);
-}
-
-static irqreturn_t exynos4_tmu_irq(int irq, void *id)
-{
-	struct exynos4_tmu_data *data = id;
-
-	disable_irq_nosync(irq);
-	schedule_work(&data->irq_work);
-
-	return IRQ_HANDLED;
-}
-
-static ssize_t exynos4_tmu_show_name(struct device *dev,
-		struct device_attribute *attr, char *buf)
-{
-	return sprintf(buf, "exynos4-tmu\n");
-}
-
-static ssize_t exynos4_tmu_show_temp(struct device *dev,
-		struct device_attribute *attr, char *buf)
-{
-	struct exynos4_tmu_data *data = dev_get_drvdata(dev);
-	int ret;
-
-	ret = exynos4_tmu_read(data);
-	if (ret < 0)
-		return ret;
-
-	/* convert from degree Celsius to millidegree Celsius */
-	return sprintf(buf, "%d\n", ret * 1000);
-}
-
-static ssize_t exynos4_tmu_show_alarm(struct device *dev,
-		struct device_attribute *devattr, char *buf)
-{
-	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
-	struct exynos4_tmu_data *data = dev_get_drvdata(dev);
-	struct exynos4_tmu_platform_data *pdata = data->pdata;
-	int temp;
-	unsigned int trigger_level;
-
-	temp = exynos4_tmu_read(data);
-	if (temp < 0)
-		return temp;
-
-	trigger_level = pdata->threshold + pdata->trigger_levels[attr->index];
-
-	return sprintf(buf, "%d\n", !!(temp > trigger_level));
-}
-
-static ssize_t exynos4_tmu_show_level(struct device *dev,
-		struct device_attribute *devattr, char *buf)
-{
-	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
-	struct exynos4_tmu_data *data = dev_get_drvdata(dev);
-	struct exynos4_tmu_platform_data *pdata = data->pdata;
-	unsigned int temp = pdata->threshold +
-			pdata->trigger_levels[attr->index];
-
-	return sprintf(buf, "%u\n", temp * 1000);
-}
-
-static DEVICE_ATTR(name, S_IRUGO, exynos4_tmu_show_name, NULL);
-static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, exynos4_tmu_show_temp, NULL, 0);
-
-static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO,
-		exynos4_tmu_show_alarm, NULL, 1);
-static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO,
-		exynos4_tmu_show_alarm, NULL, 2);
-static SENSOR_DEVICE_ATTR(temp1_emergency_alarm, S_IRUGO,
-		exynos4_tmu_show_alarm, NULL, 3);
-
-static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, exynos4_tmu_show_level, NULL, 1);
-static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, exynos4_tmu_show_level, NULL, 2);
-static SENSOR_DEVICE_ATTR(temp1_emergency, S_IRUGO,
-		exynos4_tmu_show_level, NULL, 3);
-
-static struct attribute *exynos4_tmu_attributes[] = {
-	&dev_attr_name.attr,
-	&sensor_dev_attr_temp1_input.dev_attr.attr,
-	&sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
-	&sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
-	&sensor_dev_attr_temp1_emergency_alarm.dev_attr.attr,
-	&sensor_dev_attr_temp1_max.dev_attr.attr,
-	&sensor_dev_attr_temp1_crit.dev_attr.attr,
-	&sensor_dev_attr_temp1_emergency.dev_attr.attr,
-	NULL,
-};
-
-static const struct attribute_group exynos4_tmu_attr_group = {
-	.attrs = exynos4_tmu_attributes,
-};
-
-static int __devinit exynos4_tmu_probe(struct platform_device *pdev)
-{
-	struct exynos4_tmu_data *data;
-	struct exynos4_tmu_platform_data *pdata = pdev->dev.platform_data;
-	int ret;
-
-	if (!pdata) {
-		dev_err(&pdev->dev, "No platform init data supplied.\n");
-		return -ENODEV;
-	}
-
-	data = kzalloc(sizeof(struct exynos4_tmu_data), GFP_KERNEL);
-	if (!data) {
-		dev_err(&pdev->dev, "Failed to allocate driver structure\n");
-		return -ENOMEM;
-	}
-
-	data->irq = platform_get_irq(pdev, 0);
-	if (data->irq < 0) {
-		ret = data->irq;
-		dev_err(&pdev->dev, "Failed to get platform irq\n");
-		goto err_free;
-	}
-
-	INIT_WORK(&data->irq_work, exynos4_tmu_work);
-
-	data->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!data->mem) {
-		ret = -ENOENT;
-		dev_err(&pdev->dev, "Failed to get platform resource\n");
-		goto err_free;
-	}
-
-	data->mem = request_mem_region(data->mem->start,
-			resource_size(data->mem), pdev->name);
-	if (!data->mem) {
-		ret = -ENODEV;
-		dev_err(&pdev->dev, "Failed to request memory region\n");
-		goto err_free;
-	}
-
-	data->base = ioremap(data->mem->start, resource_size(data->mem));
-	if (!data->base) {
-		ret = -ENODEV;
-		dev_err(&pdev->dev, "Failed to ioremap memory\n");
-		goto err_mem_region;
-	}
-
-	ret = request_irq(data->irq, exynos4_tmu_irq,
-		IRQF_TRIGGER_RISING,
-		"exynos4-tmu", data);
-	if (ret) {
-		dev_err(&pdev->dev, "Failed to request irq: %d\n", data->irq);
-		goto err_io_remap;
-	}
-
-	data->clk = clk_get(NULL, "tmu_apbif");
-	if (IS_ERR(data->clk)) {
-		ret = PTR_ERR(data->clk);
-		dev_err(&pdev->dev, "Failed to get clock\n");
-		goto err_irq;
-	}
-
-	data->pdata = pdata;
-	platform_set_drvdata(pdev, data);
-	mutex_init(&data->lock);
-
-	ret = exynos4_tmu_initialize(pdev);
-	if (ret) {
-		dev_err(&pdev->dev, "Failed to initialize TMU\n");
-		goto err_clk;
-	}
-
-	ret = sysfs_create_group(&pdev->dev.kobj, &exynos4_tmu_attr_group);
-	if (ret) {
-		dev_err(&pdev->dev, "Failed to create sysfs group\n");
-		goto err_clk;
-	}
-
-	data->hwmon_dev = hwmon_device_register(&pdev->dev);
-	if (IS_ERR(data->hwmon_dev)) {
-		ret = PTR_ERR(data->hwmon_dev);
-		dev_err(&pdev->dev, "Failed to register hwmon device\n");
-		goto err_create_group;
-	}
-
-	exynos4_tmu_control(pdev, true);
-
-	return 0;
-
-err_create_group:
-	sysfs_remove_group(&pdev->dev.kobj, &exynos4_tmu_attr_group);
-err_clk:
-	platform_set_drvdata(pdev, NULL);
-	clk_put(data->clk);
-err_irq:
-	free_irq(data->irq, data);
-err_io_remap:
-	iounmap(data->base);
-err_mem_region:
-	release_mem_region(data->mem->start, resource_size(data->mem));
-err_free:
-	kfree(data);
-
-	return ret;
-}
-
-static int __devexit exynos4_tmu_remove(struct platform_device *pdev)
-{
-	struct exynos4_tmu_data *data = platform_get_drvdata(pdev);
-
-	exynos4_tmu_control(pdev, false);
-
-	hwmon_device_unregister(data->hwmon_dev);
-	sysfs_remove_group(&pdev->dev.kobj, &exynos4_tmu_attr_group);
-
-	clk_put(data->clk);
-
-	free_irq(data->irq, data);
-
-	iounmap(data->base);
-	release_mem_region(data->mem->start, resource_size(data->mem));
-
-	platform_set_drvdata(pdev, NULL);
-
-	kfree(data);
-
-	return 0;
-}
-
-#ifdef CONFIG_PM_SLEEP
-static int exynos4_tmu_suspend(struct device *dev)
-{
-	exynos4_tmu_control(to_platform_device(dev), false);
-
-	return 0;
-}
-
-static int exynos4_tmu_resume(struct device *dev)
-{
-	struct platform_device *pdev = to_platform_device(dev);
-
-	exynos4_tmu_initialize(pdev);
-	exynos4_tmu_control(pdev, true);
-
-	return 0;
-}
-
-static SIMPLE_DEV_PM_OPS(exynos4_tmu_pm,
-			 exynos4_tmu_suspend, exynos4_tmu_resume);
-#define EXYNOS4_TMU_PM	&exynos4_tmu_pm
-#else
-#define EXYNOS4_TMU_PM	NULL
-#endif
-
-static struct platform_driver exynos4_tmu_driver = {
-	.driver = {
-		.name   = "exynos4-tmu",
-		.owner  = THIS_MODULE,
-		.pm     = EXYNOS4_TMU_PM,
-	},
-	.probe = exynos4_tmu_probe,
-	.remove	= __devexit_p(exynos4_tmu_remove),
-};
-
-module_platform_driver(exynos4_tmu_driver);
-
-MODULE_DESCRIPTION("EXYNOS4 TMU Driver");
-MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:exynos4-tmu");

drivers/platform/x86/acerhdf.c

@@ -329,7 +329,8 @@ static int acerhdf_bind(struct thermal_zone_device *thermal,
 	if (cdev != cl_dev)
 		return 0;
 
-	if (thermal_zone_bind_cooling_device(thermal, 0, cdev)) {
+	if (thermal_zone_bind_cooling_device(thermal, 0, cdev,
+			THERMAL_NO_LIMIT, THERMAL_NO_LIMIT)) {
 		pr_err("error binding cooling dev\n");
 		return -EINVAL;
 	}
@@ -661,7 +662,7 @@ static int acerhdf_register_thermal(void)
 		return -EINVAL;
 
 	thz_dev = thermal_zone_device_register("acerhdf", 1, 0, NULL,
-					      &acerhdf_dev_ops, 0, 0, 0,
+					      &acerhdf_dev_ops, 0,
 					      (kernelmode) ? interval*1000 : 0);
 	if (IS_ERR(thz_dev))
 		return -EINVAL;

drivers/platform/x86/intel_mid_thermal.c

@@ -502,7 +502,7 @@ static int mid_thermal_probe(struct platform_device *pdev)
 			goto err;
 		}
 		pinfo->tzd[i] = thermal_zone_device_register(name[i],
-				0, 0, td_info, &tzd_ops, 0, 0, 0, 0);
+				0, 0, td_info, &tzd_ops, 0, 0);
 		if (IS_ERR(pinfo->tzd[i])) {
 			kfree(td_info);
 			ret = PTR_ERR(pinfo->tzd[i]);

drivers/power/power_supply_core.c

@@ -201,7 +201,7 @@ static int psy_register_thermal(struct power_supply *psy)
 	for (i = 0; i < psy->num_properties; i++) {
 		if (psy->properties[i] == POWER_SUPPLY_PROP_TEMP) {
 			psy->tzd = thermal_zone_device_register(psy->name, 0, 0,
-					psy, &psy_tzd_ops, 0, 0, 0, 0);
+					psy, &psy_tzd_ops, 0, 0);
 			if (IS_ERR(psy->tzd))
 				return PTR_ERR(psy->tzd);
 			break;

drivers/staging/omap-thermal/omap-thermal-common.c

@@ -126,7 +126,9 @@ static int omap_thermal_bind(struct thermal_zone_device *thermal,
 
 	/* TODO: bind with min and max states */
 	/* Simple thing, two trips, one passive another critical */
-	return thermal_zone_bind_cooling_device(thermal, 0, cdev);
+	return thermal_zone_bind_cooling_device(thermal, 0, cdev,
+						THERMAL_NO_LIMIT,
+						THERMAL_NO_LIMIT);
 }
 
 /* Unbind callback functions for thermal zone */
@@ -268,7 +270,6 @@ int omap_thermal_expose_sensor(struct omap_bandgap *bg_ptr, int id,
 	/* Create thermal zone */
 	data->omap_thermal = thermal_zone_device_register(domain,
 				OMAP_TRIP_NUMBER, 0, data, &omap_thermal_ops,
-				1, 2, /*TODO: remove this when FW allows */
 				FAST_TEMP_MONITORING_RATE,
 				FAST_TEMP_MONITORING_RATE);
 	if (IS_ERR_OR_NULL(data->omap_thermal)) {

drivers/thermal/Kconfig

@@ -19,6 +19,17 @@ config THERMAL_HWMON
 	depends on HWMON=y || HWMON=THERMAL
 	default y
 
+config CPU_THERMAL
+	bool "generic cpu cooling support"
+	depends on THERMAL && CPU_FREQ
+	help
+	  This implements the generic cpu cooling mechanism through frequency
+	  reduction, cpu hotplug and any other ways of reducing temperature. An
+	  ACPI version of this already exists(drivers/acpi/processor_thermal.c).
+	  This will be useful for platforms using the generic thermal interface
+	  and not the ACPI interface.
+	  If you want this support, you should say Y here.
+
 config SPEAR_THERMAL
 	bool "SPEAr thermal sensor driver"
 	depends on THERMAL
@@ -27,3 +38,18 @@ config SPEAR_THERMAL
 	help
 	  Enable this to plug the SPEAr thermal sensor driver into the Linux
 	  thermal framework
+
+config RCAR_THERMAL
+	tristate "Renesas R-Car thermal driver"
+	depends on THERMAL
+	depends on ARCH_SHMOBILE
+	help
+	  Enable this to plug the R-Car thermal sensor driver into the Linux
+	  thermal framework
+
+config EXYNOS_THERMAL
+	tristate "Temperature sensor on Samsung EXYNOS"
+	depends on (ARCH_EXYNOS4 || ARCH_EXYNOS5) && THERMAL
+	help
+	  If you say yes here you get support for TMU (Thermal Managment
+	  Unit) on SAMSUNG EXYNOS series of SoC.

drivers/thermal/Makefile

@@ -3,4 +3,7 @@
 #
 
 obj-$(CONFIG_THERMAL)		+= thermal_sys.o
+obj-$(CONFIG_CPU_THERMAL)		+= cpu_cooling.o
 obj-$(CONFIG_SPEAR_THERMAL)		+= spear_thermal.o
+obj-$(CONFIG_RCAR_THERMAL)	+= rcar_thermal.o
+obj-$(CONFIG_EXYNOS_THERMAL)		+= exynos_thermal.o

drivers/thermal/cpu_cooling.c

+/*
+ *  linux/drivers/thermal/cpu_cooling.c
+ *
+ *  Copyright (C) 2012	Samsung Electronics Co., Ltd(http://www.samsung.com)
+ *  Copyright (C) 2012  Amit Daniel <amit.kachhap@linaro.org>
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *  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; version 2 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful, but
+ *  WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  General Public License for more details.
+ *
+ *  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/module.h>
+#include <linux/thermal.h>
+#include <linux/platform_device.h>
+#include <linux/cpufreq.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/cpu.h>
+#include <linux/cpu_cooling.h>
+
+/**
+ * struct cpufreq_cooling_device
+ * @id: unique integer value corresponding to each cpufreq_cooling_device
+ *	registered.
+ * @cool_dev: thermal_cooling_device pointer to keep track of the the
+ *	egistered cooling device.
+ * @cpufreq_state: integer value representing the current state of cpufreq
+ *	cooling	devices.
+ * @cpufreq_val: integer value representing the absolute value of the clipped
+ *	frequency.
+ * @allowed_cpus: all the cpus involved for this cpufreq_cooling_device.
+ * @node: list_head to link all cpufreq_cooling_device together.
+ *
+ * This structure is required for keeping information of each
+ * cpufreq_cooling_device registered as a list whose head is represented by
+ * cooling_cpufreq_list. In order to prevent corruption of this list a
+ * mutex lock cooling_cpufreq_lock is used.
+ */
+struct cpufreq_cooling_device {
+	int id;
+	struct thermal_cooling_device *cool_dev;
+	unsigned int cpufreq_state;
+	unsigned int cpufreq_val;
+	struct cpumask allowed_cpus;
+	struct list_head node;
+};
+static LIST_HEAD(cooling_cpufreq_list);
+static DEFINE_IDR(cpufreq_idr);
+
+static struct mutex cooling_cpufreq_lock;
+
+/* notify_table passes value to the CPUFREQ_ADJUST callback function. */
+#define NOTIFY_INVALID NULL
+struct cpufreq_cooling_device *notify_device;
+
+/**
+ * get_idr - function to get a unique id.
+ * @idr: struct idr * handle used to create a id.
+ * @id: int * value generated by this function.
+ */
+static int get_idr(struct idr *idr, int *id)
+{
+	int err;
+again:
+	if (unlikely(idr_pre_get(idr, GFP_KERNEL) == 0))
+		return -ENOMEM;
+
+	mutex_lock(&cooling_cpufreq_lock);
+	err = idr_get_new(idr, NULL, id);
+	mutex_unlock(&cooling_cpufreq_lock);
+
+	if (unlikely(err == -EAGAIN))
+		goto again;
+	else if (unlikely(err))
+		return err;
+
+	*id = *id & MAX_IDR_MASK;
+	return 0;
+}
+
+/**
+ * release_idr - function to free the unique id.
+ * @idr: struct idr * handle used for creating the id.
+ * @id: int value representing the unique id.
+ */
+static void release_idr(struct idr *idr, int id)
+{
+	mutex_lock(&cooling_cpufreq_lock);
+	idr_remove(idr, id);
+	mutex_unlock(&cooling_cpufreq_lock);
+}
+
+/* Below code defines functions to be used for cpufreq as cooling device */
+
+/**
+ * is_cpufreq_valid - function to check if a cpu has frequency transition policy.
+ * @cpu: cpu for which check is needed.
+ */
+static int is_cpufreq_valid(int cpu)
+{
+	struct cpufreq_policy policy;
+	return !cpufreq_get_policy(&policy, cpu);
+}
+
+/**
+ * get_cpu_frequency - get the absolute value of frequency from level.
+ * @cpu: cpu for which frequency is fetched.
+ * @level: level of frequency of the CPU
+ *	e.g level=1 --> 1st MAX FREQ, LEVEL=2 ---> 2nd MAX FREQ, .... etc
+ */
+static unsigned int get_cpu_frequency(unsigned int cpu, unsigned long level)
+{
+	int ret = 0, i = 0;
+	unsigned long level_index;
+	bool descend = false;
+	struct cpufreq_frequency_table *table =
+					cpufreq_frequency_get_table(cpu);
+	if (!table)
+		return ret;
+
+	while (table[i].frequency != CPUFREQ_TABLE_END) {
+		if (table[i].frequency == CPUFREQ_ENTRY_INVALID)
+			continue;
+
+		/*check if table in ascending or descending order*/
+		if ((table[i + 1].frequency != CPUFREQ_TABLE_END) &&
+			(table[i + 1].frequency < table[i].frequency)
+			&& !descend) {
+			descend = true;
+		}
+
+		/*return if level matched and table in descending order*/
+		if (descend && i == level)
+			return table[i].frequency;
+		i++;
+	}
+	i--;
+
+	if (level > i || descend)
+		return ret;
+	level_index = i - level;
+
+	/*Scan the table in reverse order and match the level*/
+	while (i >= 0) {
+		if (table[i].frequency == CPUFREQ_ENTRY_INVALID)
+			continue;
+		/*return if level matched*/
+		if (i == level_index)
+			return table[i].frequency;
+		i--;
+	}
+	return ret;
+}
+
+/**
+ * cpufreq_apply_cooling - function to apply frequency clipping.
+ * @cpufreq_device: cpufreq_cooling_device pointer containing frequency
+ *	clipping data.
+ * @cooling_state: value of the cooling state.
+ */
+static int cpufreq_apply_cooling(struct cpufreq_cooling_device *cpufreq_device,
+				unsigned long cooling_state)
+{
+	unsigned int cpuid, clip_freq;
+	struct cpumask *maskPtr = &cpufreq_device->allowed_cpus;
+	unsigned int cpu = cpumask_any(maskPtr);
+
+
+	/* Check if the old cooling action is same as new cooling action */
+	if (cpufreq_device->cpufreq_state == cooling_state)
+		return 0;
+
+	clip_freq = get_cpu_frequency(cpu, cooling_state);
+	if (!clip_freq)
+		return -EINVAL;
+
+	cpufreq_device->cpufreq_state = cooling_state;
+	cpufreq_device->cpufreq_val = clip_freq;
+	notify_device = cpufreq_device;
+
+	for_each_cpu(cpuid, maskPtr) {
+		if (is_cpufreq_valid(cpuid))
+			cpufreq_update_policy(cpuid);
+	}
+
+	notify_device = NOTIFY_INVALID;
+
+	return 0;
+}
+
+/**
+ * cpufreq_thermal_notifier - notifier callback for cpufreq policy change.
+ * @nb:	struct notifier_block * with callback info.
+ * @event: value showing cpufreq event for which this function invoked.
+ * @data: callback-specific data
+ */
+static int cpufreq_thermal_notifier(struct notifier_block *nb,
+					unsigned long event, void *data)
+{
+	struct cpufreq_policy *policy = data;
+	unsigned long max_freq = 0;
+
+	if (event != CPUFREQ_ADJUST || notify_device == NOTIFY_INVALID)
+		return 0;
+
+	if (cpumask_test_cpu(policy->cpu, &notify_device->allowed_cpus))
+		max_freq = notify_device->cpufreq_val;
+
+	/* Never exceed user_policy.max*/
+	if (max_freq > policy->user_policy.max)
+		max_freq = policy->user_policy.max;
+
+	if (policy->max != max_freq)
+		cpufreq_verify_within_limits(policy, 0, max_freq);
+
+	return 0;
+}
+
+/*
+ * cpufreq cooling device callback functions are defined below
+ */
+
+/**
+ * cpufreq_get_max_state - callback function to get the max cooling state.
+ * @cdev: thermal cooling device pointer.
+ * @state: fill this variable with the max cooling state.
+ */
+static int cpufreq_get_max_state(struct thermal_cooling_device *cdev,
+				 unsigned long *state)
+{
+	int ret = -EINVAL, i = 0;
+	struct cpufreq_cooling_device *cpufreq_device;
+	struct cpumask *maskPtr;
+	unsigned int cpu;
+	struct cpufreq_frequency_table *table;
+
+	mutex_lock(&cooling_cpufreq_lock);
+	list_for_each_entry(cpufreq_device, &cooling_cpufreq_list, node) {
+		if (cpufreq_device && cpufreq_device->cool_dev == cdev)
+			break;
+	}
+	if (cpufreq_device == NULL)
+		goto return_get_max_state;
+
+	maskPtr = &cpufreq_device->allowed_cpus;
+	cpu = cpumask_any(maskPtr);
+	table = cpufreq_frequency_get_table(cpu);
+	if (!table) {
+		*state = 0;
+		ret = 0;
+		goto return_get_max_state;
+	}
+
+	while (table[i].frequency != CPUFREQ_TABLE_END) {
+		if (table[i].frequency == CPUFREQ_ENTRY_INVALID)
+			continue;
+		i++;
+	}
+	if (i > 0) {
+		*state = --i;
+		ret = 0;
+	}
+
+return_get_max_state:
+	mutex_unlock(&cooling_cpufreq_lock);
+	return ret;
+}
+
+/**
+ * cpufreq_get_cur_state - callback function to get the current cooling state.
+ * @cdev: thermal cooling device pointer.
+ * @state: fill this variable with the current cooling state.
+ */
+static int cpufreq_get_cur_state(struct thermal_cooling_device *cdev,
+				 unsigned long *state)
+{
+	int ret = -EINVAL;
+	struct cpufreq_cooling_device *cpufreq_device;
+
+	mutex_lock(&cooling_cpufreq_lock);
+	list_for_each_entry(cpufreq_device, &cooling_cpufreq_list, node) {
+		if (cpufreq_device && cpufreq_device->cool_dev == cdev) {
+			*state = cpufreq_device->cpufreq_state;
+			ret = 0;
+			break;
+		}
+	}
+	mutex_unlock(&cooling_cpufreq_lock);
+
+	return ret;
+}
+
+/**
+ * cpufreq_set_cur_state - callback function to set the current cooling state.
+ * @cdev: thermal cooling device pointer.
+ * @state: set this variable to the current cooling state.
+ */
+static int cpufreq_set_cur_state(struct thermal_cooling_device *cdev,
+				 unsigned long state)
+{
+	int ret = -EINVAL;
+	struct cpufreq_cooling_device *cpufreq_device;
+
+	mutex_lock(&cooling_cpufreq_lock);
+	list_for_each_entry(cpufreq_device, &cooling_cpufreq_list, node) {
+		if (cpufreq_device && cpufreq_device->cool_dev == cdev) {
+			ret = 0;
+			break;
+		}
+	}
+	if (!ret)
+		ret = cpufreq_apply_cooling(cpufreq_device, state);
+
+	mutex_unlock(&cooling_cpufreq_lock);
+
+	return ret;
+}
+
+/* Bind cpufreq callbacks to thermal cooling device ops */
+static struct thermal_cooling_device_ops const cpufreq_cooling_ops = {
+	.get_max_state = cpufreq_get_max_state,
+	.get_cur_state = cpufreq_get_cur_state,
+	.set_cur_state = cpufreq_set_cur_state,
+};
+
+/* Notifier for cpufreq policy change */
+static struct notifier_block thermal_cpufreq_notifier_block = {
+	.notifier_call = cpufreq_thermal_notifier,
+};
+
+/**
+ * cpufreq_cooling_register - function to create cpufreq cooling device.
+ * @clip_cpus: cpumask of cpus where the frequency constraints will happen.
+ */
+struct thermal_cooling_device *cpufreq_cooling_register(
+	struct cpumask *clip_cpus)
+{
+	struct thermal_cooling_device *cool_dev;
+	struct cpufreq_cooling_device *cpufreq_dev = NULL;
+	unsigned int cpufreq_dev_count = 0, min = 0, max = 0;
+	char dev_name[THERMAL_NAME_LENGTH];
+	int ret = 0, i;
+	struct cpufreq_policy policy;
+
+	list_for_each_entry(cpufreq_dev, &cooling_cpufreq_list, node)
+		cpufreq_dev_count++;
+
+	/*Verify that all the clip cpus have same freq_min, freq_max limit*/
+	for_each_cpu(i, clip_cpus) {
+		/*continue if cpufreq policy not found and not return error*/
+		if (!cpufreq_get_policy(&policy, i))
+			continue;
+		if (min == 0 && max == 0) {
+			min = policy.cpuinfo.min_freq;
+			max = policy.cpuinfo.max_freq;
+		} else {
+			if (min != policy.cpuinfo.min_freq ||
+				max != policy.cpuinfo.max_freq)
+				return ERR_PTR(-EINVAL);
+}
+	}
+	cpufreq_dev = kzalloc(sizeof(struct cpufreq_cooling_device),
+			GFP_KERNEL);
+	if (!cpufreq_dev)
+		return ERR_PTR(-ENOMEM);
+
+	cpumask_copy(&cpufreq_dev->allowed_cpus, clip_cpus);
+
+	if (cpufreq_dev_count == 0)
+		mutex_init(&cooling_cpufreq_lock);
+
+	ret = get_idr(&cpufreq_idr, &cpufreq_dev->id);
+	if (ret) {
+		kfree(cpufreq_dev);
+		return ERR_PTR(-EINVAL);
+	}
+
+	sprintf(dev_name, "thermal-cpufreq-%d", cpufreq_dev->id);
+
+	cool_dev = thermal_cooling_device_register(dev_name, cpufreq_dev,
+						&cpufreq_cooling_ops);
+	if (!cool_dev) {
+		release_idr(&cpufreq_idr, cpufreq_dev->id);
+		kfree(cpufreq_dev);
+		return ERR_PTR(-EINVAL);
+	}
+	cpufreq_dev->cool_dev = cool_dev;
+	cpufreq_dev->cpufreq_state = 0;
+	mutex_lock(&cooling_cpufreq_lock);
+	list_add_tail(&cpufreq_dev->node, &cooling_cpufreq_list);
+
+	/* Register the notifier for first cpufreq cooling device */
+	if (cpufreq_dev_count == 0)
+		cpufreq_register_notifier(&thermal_cpufreq_notifier_block,
+						CPUFREQ_POLICY_NOTIFIER);
+
+	mutex_unlock(&cooling_cpufreq_lock);
+	return cool_dev;
+}
+EXPORT_SYMBOL(cpufreq_cooling_register);
+
+/**
+ * cpufreq_cooling_unregister - function to remove cpufreq cooling device.
+ * @cdev: thermal cooling device pointer.
+ */
+void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev)
+{
+	struct cpufreq_cooling_device *cpufreq_dev = NULL;
+	unsigned int cpufreq_dev_count = 0;
+
+	mutex_lock(&cooling_cpufreq_lock);
+	list_for_each_entry(cpufreq_dev, &cooling_cpufreq_list, node) {
+		if (cpufreq_dev && cpufreq_dev->cool_dev == cdev)
+			break;
+		cpufreq_dev_count++;
+	}
+
+	if (!cpufreq_dev || cpufreq_dev->cool_dev != cdev) {
+		mutex_unlock(&cooling_cpufreq_lock);
+		return;
+	}
+
+	list_del(&cpufreq_dev->node);
+
+	/* Unregister the notifier for the last cpufreq cooling device */
+	if (cpufreq_dev_count == 1) {
+		cpufreq_unregister_notifier(&thermal_cpufreq_notifier_block,
+					CPUFREQ_POLICY_NOTIFIER);
+	}
+	mutex_unlock(&cooling_cpufreq_lock);
+	thermal_cooling_device_unregister(cpufreq_dev->cool_dev);
+	release_idr(&cpufreq_idr, cpufreq_dev->id);
+	if (cpufreq_dev_count == 1)
+		mutex_destroy(&cooling_cpufreq_lock);
+	kfree(cpufreq_dev);
+}
+EXPORT_SYMBOL(cpufreq_cooling_unregister);

drivers/thermal/rcar_thermal.c

+/*
+ *  R-Car THS/TSC thermal sensor driver
+ *
+ * Copyright (C) 2012 Renesas Solutions Corp.
+ * Kuninori Morimoto <kuninori.morimoto.gx@renesas.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; version 2 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful, but
+ *  WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  General Public License for more details.
+ *
+ *  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/delay.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/thermal.h>
+
+#define THSCR	0x2c
+#define THSSR	0x30
+
+/* THSCR */
+#define CPTAP	0xf
+
+/* THSSR */
+#define CTEMP	0x3f
+
+
+struct rcar_thermal_priv {
+	void __iomem *base;
+	struct device *dev;
+	spinlock_t lock;
+	u32 comp;
+};
+
+/*
+ *		basic functions
+ */
+static u32 rcar_thermal_read(struct rcar_thermal_priv *priv, u32 reg)
+{
+	unsigned long flags;
+	u32 ret;
+
+	spin_lock_irqsave(&priv->lock, flags);
+
+	ret = ioread32(priv->base + reg);
+
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	return ret;
+}
+
+#if 0 /* no user at this point */
+static void rcar_thermal_write(struct rcar_thermal_priv *priv,
+			       u32 reg, u32 data)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&priv->lock, flags);
+
+	iowrite32(data, priv->base + reg);
+
+	spin_unlock_irqrestore(&priv->lock, flags);
+}
+#endif
+
+static void rcar_thermal_bset(struct rcar_thermal_priv *priv, u32 reg,
+			      u32 mask, u32 data)
+{
+	unsigned long flags;
+	u32 val;
+
+	spin_lock_irqsave(&priv->lock, flags);
+
+	val = ioread32(priv->base + reg);
+	val &= ~mask;
+	val |= (data & mask);
+	iowrite32(val, priv->base + reg);
+
+	spin_unlock_irqrestore(&priv->lock, flags);
+}
+
+/*
+ *		zone device functions
+ */
+static int rcar_thermal_get_temp(struct thermal_zone_device *zone,
+			   unsigned long *temp)
+{
+	struct rcar_thermal_priv *priv = zone->devdata;
+	int val, min, max, tmp;
+
+	tmp = -200; /* default */
+	while (1) {
+		if (priv->comp < 1 || priv->comp > 12) {
+			dev_err(priv->dev,
+				"THSSR invalid data (%d)\n", priv->comp);
+			priv->comp = 4; /* for next thermal */
+			return -EINVAL;
+		}
+
+		/*
+		 * THS comparator offset and the reference temperature
+		 *
+		 * Comparator	| reference	| Temperature field
+		 * offset	| temperature	| measurement
+		 *		| (degrees C)	| (degrees C)
+		 * -------------+---------------+-------------------
+		 *  1		|  -45		|  -45 to  -30
+		 *  2		|  -30		|  -30 to  -15
+		 *  3		|  -15		|  -15 to    0
+		 *  4		|    0		|    0 to  +15
+		 *  5		|  +15		|  +15 to  +30
+		 *  6		|  +30		|  +30 to  +45
+		 *  7		|  +45		|  +45 to  +60
+		 *  8		|  +60		|  +60 to  +75
+		 *  9		|  +75		|  +75 to  +90
+		 * 10		|  +90		|  +90 to +105
+		 * 11		| +105		| +105 to +120
+		 * 12		| +120		| +120 to +135
+		 */
+
+		/* calculate thermal limitation */
+		min = (priv->comp * 15) - 60;
+		max = min + 15;
+
+		/*
+		 * we need to wait 300us after changing comparator offset
+		 * to get stable temperature.
+		 * see "Usage Notes" on datasheet
+		 */
+		rcar_thermal_bset(priv, THSCR, CPTAP, priv->comp);
+		udelay(300);
+
+		/* calculate current temperature */
+		val = rcar_thermal_read(priv, THSSR) & CTEMP;
+		val = (val * 5) - 65;
+
+		dev_dbg(priv->dev, "comp/min/max/val = %d/%d/%d/%d\n",
+			priv->comp, min, max, val);
+
+		/*
+		 * If val is same as min/max, then,
+		 * it should try again on next comparator.
+		 * But the val might be correct temperature.
+		 * Keep it on "tmp" and compare with next val.
+		 */
+		if (tmp == val)
+			break;
+
+		if (val <= min) {
+			tmp = min;
+			priv->comp--; /* try again */
+		} else if (val >= max) {
+			tmp = max;
+			priv->comp++; /* try again */
+		} else {
+			tmp = val;
+			break;
+		}
+	}
+
+	*temp = tmp;
+	return 0;
+}
+
+static struct thermal_zone_device_ops rcar_thermal_zone_ops = {
+	.get_temp = rcar_thermal_get_temp,
+};
+
+/*
+ *		platform functions
+ */
+static int rcar_thermal_probe(struct platform_device *pdev)
+{
+	struct thermal_zone_device *zone;
+	struct rcar_thermal_priv *priv;
+	struct resource *res;
+	int ret;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		dev_err(&pdev->dev, "Could not get platform resource\n");
+		return -ENODEV;
+	}
+
+	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv) {
+		dev_err(&pdev->dev, "Could not allocate priv\n");
+		return -ENOMEM;
+	}
+
+	priv->comp = 4; /* basic setup */
+	priv->dev = &pdev->dev;
+	spin_lock_init(&priv->lock);
+	priv->base = devm_ioremap_nocache(&pdev->dev,
+					  res->start, resource_size(res));
+	if (!priv->base) {
+		dev_err(&pdev->dev, "Unable to ioremap thermal register\n");
+		ret = -ENOMEM;
+		goto error_free_priv;
+	}
+
+	zone = thermal_zone_device_register("rcar_thermal", 0, priv,
+					    &rcar_thermal_zone_ops, 0, 0);
+	if (IS_ERR(zone)) {
+		dev_err(&pdev->dev, "thermal zone device is NULL\n");
+		ret = PTR_ERR(zone);
+		goto error_iounmap;
+	}
+
+	platform_set_drvdata(pdev, zone);
+
+	dev_info(&pdev->dev, "proved\n");
+
+	return 0;
+
+error_iounmap:
+	devm_iounmap(&pdev->dev, priv->base);
+error_free_priv:
+	devm_kfree(&pdev->dev, priv);
+
+	return ret;
+}
+
+static int rcar_thermal_remove(struct platform_device *pdev)
+{
+	struct thermal_zone_device *zone = platform_get_drvdata(pdev);
+	struct rcar_thermal_priv *priv = zone->devdata;
+
+	thermal_zone_device_unregister(zone);
+	platform_set_drvdata(pdev, NULL);
+
+	devm_iounmap(&pdev->dev, priv->base);
+	devm_kfree(&pdev->dev, priv);
+
+	return 0;
+}
+
+static struct platform_driver rcar_thermal_driver = {
+	.driver	= {
+		.name	= "rcar_thermal",
+	},
+	.probe		= rcar_thermal_probe,
+	.remove		= rcar_thermal_remove,
+};
+module_platform_driver(rcar_thermal_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("R-Car THS/TSC thermal sensor driver");
+MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");

drivers/thermal/spear_thermal.c

@@ -147,7 +147,7 @@ static int spear_thermal_probe(struct platform_device *pdev)
 	writel_relaxed(stdev->flags, stdev->thermal_base);
 
 	spear_thermal = thermal_zone_device_register("spear_thermal", 0, 0,
-				stdev, &ops, 0, 0, 0, 0);
+				stdev, &ops, 0, 0);
 	if (IS_ERR(spear_thermal)) {
 		dev_err(&pdev->dev, "thermal zone device is NULL\n");
 		ret = PTR_ERR(spear_thermal);

drivers/thermal/thermal_sys.c

@@ -41,15 +41,25 @@ MODULE_AUTHOR("Zhang Rui");
 MODULE_DESCRIPTION("Generic thermal management sysfs support");
 MODULE_LICENSE("GPL");
 
-struct thermal_cooling_device_instance {
+#define THERMAL_NO_TARGET -1UL
+/*
+ * This structure is used to describe the behavior of
+ * a certain cooling device on a certain trip point
+ * in a certain thermal zone
+ */
+struct thermal_instance {
 	int id;
 	char name[THERMAL_NAME_LENGTH];
 	struct thermal_zone_device *tz;
 	struct thermal_cooling_device *cdev;
 	int trip;
+	unsigned long upper;	/* Highest cooling state for this trip point */
+	unsigned long lower;	/* Lowest cooling state for this trip point */
+	unsigned long target;	/* expected cooling state */
 	char attr_name[THERMAL_NAME_LENGTH];
 	struct device_attribute attr;
-	struct list_head node;
+	struct list_head tz_node; /* node in tz->thermal_instances */
+	struct list_head cdev_node; /* node in cdev->thermal_instances */
 };
 
 static DEFINE_IDR(thermal_tz_idr);
@@ -308,8 +318,9 @@ passive_store(struct device *dev, struct device_attribute *attr,
 			if (!strncmp("Processor", cdev->type,
 				     sizeof("Processor")))
 				thermal_zone_bind_cooling_device(tz,
-								 THERMAL_TRIPS_NONE,
-								 cdev);
+						THERMAL_TRIPS_NONE, cdev,
+						THERMAL_NO_LIMIT,
+						THERMAL_NO_LIMIT);
 		}
 		mutex_unlock(&thermal_list_lock);
 		if (!tz->passive_delay)
@@ -327,9 +338,6 @@ passive_store(struct device *dev, struct device_attribute *attr,
 		tz->passive_delay = 0;
 	}
 
-	tz->tc1 = 1;
-	tz->tc2 = 1;
-
 	tz->forced_passive = state;
 
 	thermal_zone_device_update(tz);
@@ -425,10 +433,10 @@ static ssize_t
 thermal_cooling_device_trip_point_show(struct device *dev,
 				       struct device_attribute *attr, char *buf)
 {
-	struct thermal_cooling_device_instance *instance;
+	struct thermal_instance *instance;
 
 	instance =
-	    container_of(attr, struct thermal_cooling_device_instance, attr);
+	    container_of(attr, struct thermal_instance, attr);
 
 	if (instance->trip == THERMAL_TRIPS_NONE)
 		return sprintf(buf, "-1\n");
@@ -590,7 +598,7 @@ thermal_add_hwmon_sysfs(struct thermal_zone_device *tz)
 	temp->tz = tz;
 	hwmon->count++;
 
-	snprintf(temp->temp_input.name, THERMAL_NAME_LENGTH,
+	snprintf(temp->temp_input.name, sizeof(temp->temp_input.name),
 		 "temp%d_input", hwmon->count);
 	temp->temp_input.attr.attr.name = temp->temp_input.name;
 	temp->temp_input.attr.attr.mode = 0444;
@@ -603,7 +611,8 @@ thermal_add_hwmon_sysfs(struct thermal_zone_device *tz)
 	if (tz->ops->get_crit_temp) {
 		unsigned long temperature;
 		if (!tz->ops->get_crit_temp(tz, &temperature)) {
-			snprintf(temp->temp_crit.name, THERMAL_NAME_LENGTH,
+			snprintf(temp->temp_crit.name,
+				 sizeof(temp->temp_crit.name),
 				"temp%d_crit", hwmon->count);
 			temp->temp_crit.attr.attr.name = temp->temp_crit.name;
 			temp->temp_crit.attr.attr.mode = 0444;
@@ -704,74 +713,6 @@ static void thermal_zone_device_set_polling(struct thermal_zone_device *tz,
 		cancel_delayed_work(&tz->poll_queue);
 }
 
-static void thermal_zone_device_passive(struct thermal_zone_device *tz,
-					int temp, int trip_temp, int trip)
-{
-	int trend = 0;
-	struct thermal_cooling_device_instance *instance;
-	struct thermal_cooling_device *cdev;
-	long state, max_state;
-
-	/*
-	 * Above Trip?
-	 * -----------
-	 * Calculate the thermal trend (using the passive cooling equation)
-	 * and modify the performance limit for all passive cooling devices
-	 * accordingly.  Note that we assume symmetry.
-	 */
-	if (temp >= trip_temp) {
-		tz->passive = true;
-
-		trend = (tz->tc1 * (temp - tz->last_temperature)) +
-			(tz->tc2 * (temp - trip_temp));
-
-		/* Heating up? */
-		if (trend > 0) {
-			list_for_each_entry(instance, &tz->cooling_devices,
-					    node) {
-				if (instance->trip != trip)
-					continue;
-				cdev = instance->cdev;
-				cdev->ops->get_cur_state(cdev, &state);
-				cdev->ops->get_max_state(cdev, &max_state);
-				if (state++ < max_state)
-					cdev->ops->set_cur_state(cdev, state);
-			}
-		} else if (trend < 0) { /* Cooling off? */
-			list_for_each_entry(instance, &tz->cooling_devices,
-					    node) {
-				if (instance->trip != trip)
-					continue;
-				cdev = instance->cdev;
-				cdev->ops->get_cur_state(cdev, &state);
-				cdev->ops->get_max_state(cdev, &max_state);
-				if (state > 0)
-					cdev->ops->set_cur_state(cdev, --state);
-			}
-		}
-		return;
-	}
-
-	/*
-	 * Below Trip?
-	 * -----------
-	 * Implement passive cooling hysteresis to slowly increase performance
-	 * and avoid thrashing around the passive trip point.  Note that we
-	 * assume symmetry.
-	 */
-	list_for_each_entry(instance, &tz->cooling_devices, node) {
-		if (instance->trip != trip)
-			continue;
-		cdev = instance->cdev;
-		cdev->ops->get_cur_state(cdev, &state);
-		cdev->ops->get_max_state(cdev, &max_state);
-		if (state > 0)
-			cdev->ops->set_cur_state(cdev, --state);
-		if (state == 0)
-			tz->passive = false;
-	}
-}
-
 static void thermal_zone_device_check(struct work_struct *work)
 {
 	struct thermal_zone_device *tz = container_of(work, struct
@@ -791,12 +732,14 @@ static void thermal_zone_device_check(struct work_struct *work)
  */
 int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz,
 				     int trip,
-				     struct thermal_cooling_device *cdev)
+				     struct thermal_cooling_device *cdev,
+				     unsigned long upper, unsigned long lower)
 {
-	struct thermal_cooling_device_instance *dev;
-	struct thermal_cooling_device_instance *pos;
+	struct thermal_instance *dev;
+	struct thermal_instance *pos;
 	struct thermal_zone_device *pos1;
 	struct thermal_cooling_device *pos2;
+	unsigned long max_state;
 	int result;
 
 	if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE))
@@ -814,13 +757,26 @@ int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz,
 	if (tz != pos1 || cdev != pos2)
 		return -EINVAL;
 
+	cdev->ops->get_max_state(cdev, &max_state);
+
+	/* lower default 0, upper default max_state */
+	lower = lower == THERMAL_NO_LIMIT ? 0 : lower;
+	upper = upper == THERMAL_NO_LIMIT ? max_state : upper;
+
+	if (lower > upper || upper > max_state)
+		return -EINVAL;
+
 	dev =
-	    kzalloc(sizeof(struct thermal_cooling_device_instance), GFP_KERNEL);
+	    kzalloc(sizeof(struct thermal_instance), GFP_KERNEL);
 	if (!dev)
 		return -ENOMEM;
 	dev->tz = tz;
 	dev->cdev = cdev;
 	dev->trip = trip;
+	dev->upper = upper;
+	dev->lower = lower;
+	dev->target = THERMAL_NO_TARGET;
+
 	result = get_idr(&tz->idr, &tz->lock, &dev->id);
 	if (result)
 		goto free_mem;
@@ -841,13 +797,17 @@ int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz,
 		goto remove_symbol_link;
 
 	mutex_lock(&tz->lock);
-	list_for_each_entry(pos, &tz->cooling_devices, node)
+	mutex_lock(&cdev->lock);
+	list_for_each_entry(pos, &tz->thermal_instances, tz_node)
 	    if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) {
 		result = -EEXIST;
 		break;
 	}
-	if (!result)
-		list_add_tail(&dev->node, &tz->cooling_devices);
+	if (!result) {
+		list_add_tail(&dev->tz_node, &tz->thermal_instances);
+		list_add_tail(&dev->cdev_node, &cdev->thermal_instances);
+	}
+	mutex_unlock(&cdev->lock);
 	mutex_unlock(&tz->lock);
 
 	if (!result)
@@ -877,16 +837,20 @@ int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz,
 				       int trip,
 				       struct thermal_cooling_device *cdev)
 {
-	struct thermal_cooling_device_instance *pos, *next;
+	struct thermal_instance *pos, *next;
 
 	mutex_lock(&tz->lock);
-	list_for_each_entry_safe(pos, next, &tz->cooling_devices, node) {
+	mutex_lock(&cdev->lock);
+	list_for_each_entry_safe(pos, next, &tz->thermal_instances, tz_node) {
 		if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) {
-			list_del(&pos->node);
+			list_del(&pos->tz_node);
+			list_del(&pos->cdev_node);
+			mutex_unlock(&cdev->lock);
 			mutex_unlock(&tz->lock);
 			goto unbind;
 		}
 	}
+	mutex_unlock(&cdev->lock);
 	mutex_unlock(&tz->lock);
 
 	return -ENODEV;
@@ -934,7 +898,7 @@ thermal_cooling_device_register(char *type, void *devdata,
 	struct thermal_zone_device *pos;
 	int result;
 
-	if (strlen(type) >= THERMAL_NAME_LENGTH)
+	if (type && strlen(type) >= THERMAL_NAME_LENGTH)
 		return ERR_PTR(-EINVAL);
 
 	if (!ops || !ops->get_max_state || !ops->get_cur_state ||
@@ -951,8 +915,11 @@ thermal_cooling_device_register(char *type, void *devdata,
 		return ERR_PTR(result);
 	}
 
-	strcpy(cdev->type, type);
+	strcpy(cdev->type, type ? : "");
+	mutex_init(&cdev->lock);
+	INIT_LIST_HEAD(&cdev->thermal_instances);
 	cdev->ops = ops;
+	cdev->updated = true;
 	cdev->device.class = &thermal_class;
 	cdev->devdata = devdata;
 	dev_set_name(&cdev->device, "cooling_device%d", cdev->id);
@@ -1044,6 +1011,136 @@ void thermal_cooling_device_unregister(struct
 }
 EXPORT_SYMBOL(thermal_cooling_device_unregister);
 
+static void thermal_cdev_do_update(struct thermal_cooling_device *cdev)
+{
+	struct thermal_instance *instance;
+	unsigned long target = 0;
+
+	/* cooling device is updated*/
+	if (cdev->updated)
+		return;
+
+	mutex_lock(&cdev->lock);
+	/* Make sure cdev enters the deepest cooling state */
+	list_for_each_entry(instance, &cdev->thermal_instances, cdev_node) {
+		if (instance->target == THERMAL_NO_TARGET)
+			continue;
+		if (instance->target > target)
+			target = instance->target;
+	}
+	mutex_unlock(&cdev->lock);
+	cdev->ops->set_cur_state(cdev, target);
+	cdev->updated = true;
+}
+
+static void thermal_zone_do_update(struct thermal_zone_device *tz)
+{
+	struct thermal_instance *instance;
+
+	list_for_each_entry(instance, &tz->thermal_instances, tz_node)
+		thermal_cdev_do_update(instance->cdev);
+}
+
+/*
+ * Cooling algorithm for both active and passive cooling
+ *
+ * 1. if the temperature is higher than a trip point,
+ *    a. if the trend is THERMAL_TREND_RAISING, use higher cooling
+ *       state for this trip point
+ *    b. if the trend is THERMAL_TREND_DROPPING, use lower cooling
+ *       state for this trip point
+ *
+ * 2. if the temperature is lower than a trip point, use lower
+ *    cooling state for this trip point
+ *
+ * Note that this behaves the same as the previous passive cooling
+ * algorithm.
+ */
+
+static void thermal_zone_trip_update(struct thermal_zone_device *tz,
+				     int trip, long temp)
+{
+	struct thermal_instance *instance;
+	struct thermal_cooling_device *cdev = NULL;
+	unsigned long cur_state, max_state;
+	long trip_temp;
+	enum thermal_trip_type trip_type;
+	enum thermal_trend trend;
+
+	if (trip == THERMAL_TRIPS_NONE) {
+		trip_temp = tz->forced_passive;
+		trip_type = THERMAL_TRIPS_NONE;
+	} else {
+		tz->ops->get_trip_temp(tz, trip, &trip_temp);
+		tz->ops->get_trip_type(tz, trip, &trip_type);
+	}
+
+	if (!tz->ops->get_trend || tz->ops->get_trend(tz, trip, &trend)) {
+		/*
+		 * compare the current temperature and previous temperature
+		 * to get the thermal trend, if no special requirement
+		 */
+		if (tz->temperature > tz->last_temperature)
+			trend = THERMAL_TREND_RAISING;
+		else if (tz->temperature < tz->last_temperature)
+			trend = THERMAL_TREND_DROPPING;
+		else
+			trend = THERMAL_TREND_STABLE;
+	}
+
+	if (temp >= trip_temp) {
+		list_for_each_entry(instance, &tz->thermal_instances, tz_node) {
+			if (instance->trip != trip)
+				continue;
+
+			cdev = instance->cdev;
+
+			cdev->ops->get_cur_state(cdev, &cur_state);
+			cdev->ops->get_max_state(cdev, &max_state);
+
+			if (trend == THERMAL_TREND_RAISING) {
+				cur_state = cur_state < instance->upper ?
+					    (cur_state + 1) : instance->upper;
+			} else if (trend == THERMAL_TREND_DROPPING) {
+				cur_state = cur_state > instance->lower ?
+				    (cur_state - 1) : instance->lower;
+			}
+
+			/* activate a passive thermal instance */
+			if ((trip_type == THERMAL_TRIP_PASSIVE ||
+			     trip_type == THERMAL_TRIPS_NONE) &&
+			     instance->target == THERMAL_NO_TARGET)
+				tz->passive++;
+
+			instance->target = cur_state;
+			cdev->updated = false; /* cooling device needs update */
+		}
+	} else {	/* below trip */
+		list_for_each_entry(instance, &tz->thermal_instances, tz_node) {
+			if (instance->trip != trip)
+				continue;
+
+			/* Do not use the inactive thermal instance */
+			if (instance->target == THERMAL_NO_TARGET)
+				continue;
+			cdev = instance->cdev;
+			cdev->ops->get_cur_state(cdev, &cur_state);
+
+			cur_state = cur_state > instance->lower ?
+				    (cur_state - 1) : THERMAL_NO_TARGET;
+
+			/* deactivate a passive thermal instance */
+			if ((trip_type == THERMAL_TRIP_PASSIVE ||
+			     trip_type == THERMAL_TRIPS_NONE) &&
+			     cur_state == THERMAL_NO_TARGET)
+				tz->passive--;
+			instance->target = cur_state;
+			cdev->updated = false; /* cooling device needs update */
+		}
+	}
+
+	return;
+}
 /**
  * thermal_zone_device_update - force an update of a thermal zone's state
  * @ttz:	the thermal zone to update
@@ -1054,8 +1151,6 @@ void thermal_zone_device_update(struct thermal_zone_device *tz)
 	int count, ret = 0;
 	long temp, trip_temp;
 	enum thermal_trip_type trip_type;
-	struct thermal_cooling_device_instance *instance;
-	struct thermal_cooling_device *cdev;
 
 	mutex_lock(&tz->lock);
 
@@ -1065,6 +1160,9 @@ void thermal_zone_device_update(struct thermal_zone_device *tz)
 		goto leave;
 	}
 
+	tz->last_temperature = tz->temperature;
+	tz->temperature = temp;
+
 	for (count = 0; count < tz->trips; count++) {
 		tz->ops->get_trip_type(tz, count, &trip_type);
 		tz->ops->get_trip_temp(tz, count, &trip_temp);
@@ -1088,32 +1186,18 @@ void thermal_zone_device_update(struct thermal_zone_device *tz)
 					tz->ops->notify(tz, count, trip_type);
 			break;
 		case THERMAL_TRIP_ACTIVE:
-			list_for_each_entry(instance, &tz->cooling_devices,
-					    node) {
-				if (instance->trip != count)
-					continue;
-
-				cdev = instance->cdev;
-
-				if (temp >= trip_temp)
-					cdev->ops->set_cur_state(cdev, 1);
-				else
-					cdev->ops->set_cur_state(cdev, 0);
-			}
+			thermal_zone_trip_update(tz, count, temp);
 			break;
 		case THERMAL_TRIP_PASSIVE:
 			if (temp >= trip_temp || tz->passive)
-				thermal_zone_device_passive(tz, temp,
-							    trip_temp, count);
+				thermal_zone_trip_update(tz, count, temp);
 			break;
 		}
 	}
 
 	if (tz->forced_passive)
-		thermal_zone_device_passive(tz, temp, tz->forced_passive,
-					    THERMAL_TRIPS_NONE);
-
-	tz->last_temperature = temp;
+		thermal_zone_trip_update(tz, THERMAL_TRIPS_NONE, temp);
+	thermal_zone_do_update(tz);
 
 leave:
 	if (tz->passive)
@@ -1236,8 +1320,6 @@ static void remove_trip_attrs(struct thermal_zone_device *tz)
  * @mask:	a bit string indicating the writeablility of trip points
  * @devdata:	private device data
  * @ops:	standard thermal zone device callbacks
- * @tc1:	thermal coefficient 1 for passive calculations
- * @tc2:	thermal coefficient 2 for passive calculations
  * @passive_delay: number of milliseconds to wait between polls when
  *		   performing passive cooling
  * @polling_delay: number of milliseconds to wait between polls when checking
@@ -1245,13 +1327,12 @@ static void remove_trip_attrs(struct thermal_zone_device *tz)
  *		   driven systems)
  *
  * thermal_zone_device_unregister() must be called when the device is no
- * longer needed. The passive cooling formula uses tc1 and tc2 as described in
- * section 11.1.5.1 of the ACPI specification 3.0.
+ * longer needed. The passive cooling depends on the .get_trend() return value.
  */
 struct thermal_zone_device *thermal_zone_device_register(const char *type,
 	int trips, int mask, void *devdata,
 	const struct thermal_zone_device_ops *ops,
-	int tc1, int tc2, int passive_delay, int polling_delay)
+	int passive_delay, int polling_delay)
 {
 	struct thermal_zone_device *tz;
 	struct thermal_cooling_device *pos;
@@ -1260,7 +1341,7 @@ struct thermal_zone_device *thermal_zone_device_register(const char *type,
 	int count;
 	int passive = 0;
 
-	if (strlen(type) >= THERMAL_NAME_LENGTH)
+	if (type && strlen(type) >= THERMAL_NAME_LENGTH)
 		return ERR_PTR(-EINVAL);
 
 	if (trips > THERMAL_MAX_TRIPS || trips < 0 || mask >> trips)
@@ -1273,7 +1354,7 @@ struct thermal_zone_device *thermal_zone_device_register(const char *type,
 	if (!tz)
 		return ERR_PTR(-ENOMEM);
 
-	INIT_LIST_HEAD(&tz->cooling_devices);
+	INIT_LIST_HEAD(&tz->thermal_instances);
 	idr_init(&tz->idr);
 	mutex_init(&tz->lock);
 	result = get_idr(&thermal_tz_idr, &thermal_idr_lock, &tz->id);
@@ -1282,13 +1363,11 @@ struct thermal_zone_device *thermal_zone_device_register(const char *type,
 		return ERR_PTR(result);
 	}
 
-	strcpy(tz->type, type);
+	strcpy(tz->type, type ? : "");
 	tz->ops = ops;
 	tz->device.class = &thermal_class;
 	tz->devdata = devdata;
 	tz->trips = trips;
-	tz->tc1 = tc1;
-	tz->tc2 = tc2;
 	tz->passive_delay = passive_delay;
 	tz->polling_delay = polling_delay;
 

include/linux/cpu_cooling.h

+/*
+ *  linux/include/linux/cpu_cooling.h
+ *
+ *  Copyright (C) 2012	Samsung Electronics Co., Ltd(http://www.samsung.com)
+ *  Copyright (C) 2012  Amit Daniel <amit.kachhap@linaro.org>
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *  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; version 2 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful, but
+ *  WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  General Public License for more details.
+ *
+ *  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.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+
+#ifndef __CPU_COOLING_H__
+#define __CPU_COOLING_H__
+
+#include <linux/thermal.h>
+
+#define CPUFREQ_COOLING_START		0
+#define CPUFREQ_COOLING_STOP		1
+
+#ifdef CONFIG_CPU_THERMAL
+/**
+ * cpufreq_cooling_register - function to create cpufreq cooling device.
+ * @clip_cpus: cpumask of cpus where the frequency constraints will happen
+ */
+struct thermal_cooling_device *cpufreq_cooling_register(
+		struct cpumask *clip_cpus);
+
+/**
+ * cpufreq_cooling_unregister - function to remove cpufreq cooling device.
+ * @cdev: thermal cooling device pointer.
+ */
+void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev);
+#else /* !CONFIG_CPU_THERMAL */
+static inline struct thermal_cooling_device *cpufreq_cooling_register(
+	struct cpumask *clip_cpus)
+{
+	return NULL;
+}
+static inline void cpufreq_cooling_unregister(
+		struct thermal_cooling_device *cdev)
+{
+	return;
+}
+#endif	/* CONFIG_CPU_THERMAL */
+
+#endif /* __CPU_COOLING_H__ */

include/linux/platform_data/exynos4_tmu.h → include/linux/platform_data/exynos_thermal.h

 /*
- * exynos4_tmu.h - Samsung EXYNOS4 TMU (Thermal Management Unit)
+ * exynos_thermal.h - Samsung EXYNOS TMU (Thermal Management Unit)
  *
  *  Copyright (C) 2011 Samsung Electronics
  *  Donggeun Kim <dg77.kim@samsung.com>
@@ -19,8 +19,9 @@
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
-#ifndef _LINUX_EXYNOS4_TMU_H
-#define _LINUX_EXYNOS4_TMU_H
+#ifndef _LINUX_EXYNOS_THERMAL_H
+#define _LINUX_EXYNOS_THERMAL_H
+#include <linux/cpu_cooling.h>
 
 enum calibration_type {
 	TYPE_ONE_POINT_TRIMMING,
@@ -28,8 +29,28 @@ enum calibration_type {
 	TYPE_NONE,
 };
 
+enum soc_type {
+	SOC_ARCH_EXYNOS4210 = 1,
+	SOC_ARCH_EXYNOS,
+};
+/**
+ * struct freq_clip_table
+ * @freq_clip_max: maximum frequency allowed for this cooling state.
+ * @temp_level: Temperature level at which the temperature clipping will
+ *	happen.
+ * @mask_val: cpumask of the allowed cpu's where the clipping will take place.
+ *
+ * This structure is required to be filled and passed to the
+ * cpufreq_cooling_unregister function.
+ */
+struct freq_clip_table {
+	unsigned int freq_clip_max;
+	unsigned int temp_level;
+	const struct cpumask *mask_val;
+};
+
 /**
- * struct exynos4_tmu_platform_data
+ * struct exynos_tmu_platform_data
  * @threshold: basic temperature for generating interrupt
  *	       25 <= threshold <= 125 [unit: degree Celsius]
  * @trigger_levels: array for each interrupt levels
@@ -63,11 +84,18 @@ enum calibration_type {
  * @reference_voltage: reference voltage of amplifier
  *	in the positive-TC generator block
  *	0 <= reference_voltage <= 31
+ * @noise_cancel_mode: noise cancellation mode
+ *	000, 100, 101, 110 and 111 can be different modes
+ * @type: determines the type of SOC
+ * @efuse_value: platform defined fuse value
  * @cal_type: calibration type for temperature
+ * @freq_clip_table: Table representing frequency reduction percentage.
+ * @freq_tab_count: Count of the above table as frequency reduction may
+ *	applicable to only some of the trigger levels.
  *
- * This structure is required for configuration of exynos4_tmu driver.
+ * This structure is required for configuration of exynos_tmu driver.
  */
-struct exynos4_tmu_platform_data {
+struct exynos_tmu_platform_data {
 	u8 threshold;
 	u8 trigger_levels[4];
 	bool trigger_level0_en;
@@ -77,7 +105,12 @@ struct exynos4_tmu_platform_data {
 
 	u8 gain;
 	u8 reference_voltage;
+	u8 noise_cancel_mode;
+	u32 efuse_value;
 
 	enum calibration_type cal_type;
+	enum soc_type type;
+	struct freq_clip_table freq_tab[4];
+	unsigned int freq_tab_count;
 };
-#endif /* _LINUX_EXYNOS4_TMU_H */
+#endif /* _LINUX_EXYNOS_THERMAL_H */

include/linux/thermal.h

@@ -44,6 +44,12 @@ enum thermal_trip_type {
 	THERMAL_TRIP_CRITICAL,
 };
 
+enum thermal_trend {
+	THERMAL_TREND_STABLE, /* temperature is stable */
+	THERMAL_TREND_RAISING, /* temperature is raising */
+	THERMAL_TREND_DROPPING, /* temperature is dropping */
+};
+
 struct thermal_zone_device_ops {
 	int (*bind) (struct thermal_zone_device *,
 		     struct thermal_cooling_device *);
@@ -65,6 +71,8 @@ struct thermal_zone_device_ops {
 	int (*set_trip_hyst) (struct thermal_zone_device *, int,
 			      unsigned long);
 	int (*get_crit_temp) (struct thermal_zone_device *, unsigned long *);
+	int (*get_trend) (struct thermal_zone_device *, int,
+			  enum thermal_trend *);
 	int (*notify) (struct thermal_zone_device *, int,
 		       enum thermal_trip_type);
 };
@@ -75,6 +83,8 @@ struct thermal_cooling_device_ops {
 	int (*set_cur_state) (struct thermal_cooling_device *, unsigned long);
 };
 
+#define THERMAL_NO_LIMIT -1UL /* no upper/lower limit requirement */
+
 #define THERMAL_TRIPS_NONE -1
 #define THERMAL_MAX_TRIPS 12
 #define THERMAL_NAME_LENGTH 20
@@ -84,6 +94,9 @@ struct thermal_cooling_device {
 	struct device device;
 	void *devdata;
 	const struct thermal_cooling_device_ops *ops;
+	bool updated; /* true if the cooling device does not need update */
+	struct mutex lock; /* protect thermal_instances list */
+	struct list_head thermal_instances;
 	struct list_head node;
 };
 
@@ -105,17 +118,16 @@ struct thermal_zone_device {
 	struct thermal_attr *trip_hyst_attrs;
 	void *devdata;
 	int trips;
-	int tc1;
-	int tc2;
 	int passive_delay;
 	int polling_delay;
+	int temperature;
 	int last_temperature;
-	bool passive;
+	int passive;
 	unsigned int forced_passive;
 	const struct thermal_zone_device_ops *ops;
-	struct list_head cooling_devices;
+	struct list_head thermal_instances;
 	struct idr idr;
-	struct mutex lock;	/* protect cooling devices list */
+	struct mutex lock; /* protect thermal_instances list */
 	struct list_head node;
 	struct delayed_work poll_queue;
 };
@@ -152,12 +164,12 @@ enum {
 #define THERMAL_GENL_CMD_MAX (__THERMAL_GENL_CMD_MAX - 1)
 
 struct thermal_zone_device *thermal_zone_device_register(const char *, int, int,
-		void *, const struct thermal_zone_device_ops *, int tc1,
-		int tc2, int passive_freq, int polling_freq);
+		void *, const struct thermal_zone_device_ops *, int, int);
 void thermal_zone_device_unregister(struct thermal_zone_device *);
 
 int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int,
-				     struct thermal_cooling_device *);
+				     struct thermal_cooling_device *,
+				     unsigned long, unsigned long);
 int thermal_zone_unbind_cooling_device(struct thermal_zone_device *, int,
 				       struct thermal_cooling_device *);
 void thermal_zone_device_update(struct thermal_zone_device *);

tools/power/acpi/acpidump.c

@@ -62,7 +62,6 @@ typedef long long			s64;
 #include <unistd.h>
 #include <getopt.h>
 
-#include <sys/types.h>
 #include <dirent.h>
 
 #include <acpi/acconfig.h>