Merge branches 'exynos-fix', 'for-rc', 'int3403-fix', 'misc', 'rcar-thermal' and 'sti-thermal' of .git into next

Documentation/devicetree/bindings/thermal/rcar-thermal.txt

···
 * Renesas R-Car Thermal
 
 Required properties:
-- compatible		: "renesas,rcar-thermal"
+- compatible		: "renesas,thermal-<soctype>", "renesas,rcar-thermal"
+			  as fallback.
+			  Examples with soctypes are:
+			    - "renesas,thermal-r8a73a4" (R-Mobile AP6)
+			    - "renesas,thermal-r8a7779" (R-Car H1)
+			    - "renesas,thermal-r8a7790" (R-Car H2)
+			    - "renesas,thermal-r8a7791" (R-Car M2)
 - reg			: Address range of the thermal registers.
 			  The 1st reg will be recognized as common register
 			  if it has "interrupts".
···
 
 Example (non interrupt support):
 
-thermal@e61f0100 {
-	compatible = "renesas,rcar-thermal";
-	reg = <0xe61f0100 0x38>;
+thermal@ffc48000 {
+	compatible = "renesas,thermal-r8a7779", "renesas,rcar-thermal";
+	reg = <0xffc48000 0x38>;
 };
 
 Example (interrupt support):
 
 thermal@e61f0000 {
-	compatible = "renesas,rcar-thermal";
+	compatible = "renesas,thermal-r8a73a4", "renesas,rcar-thermal";
 	reg = <0xe61f0000 0x14
 		0xe61f0100 0x38
 		0xe61f0200 0x38
 		0xe61f0300 0x38>;
-	interrupts = <0 69 4>;
+	interrupts = <0 69 IRQ_TYPE_LEVEL_HIGH>;
 };

Documentation/devicetree/bindings/thermal/st-thermal.txt

···
+Binding for Thermal Sensor driver for STMicroelectronics STi series of SoCs.
+
+Required parameters:
+-------------------
+
+compatible : 	st,<SoC>-<module>-thermal; should be one of:
+		  "st,stih415-sas-thermal",
+		  "st,stih415-mpe-thermal",
+		  "st,stih416-sas-thermal"
+		  "st,stih416-mpe-thermal"
+		  "st,stid127-thermal" or
+		  "st,stih407-thermal"
+		according to the SoC type (stih415, stih416, stid127, stih407)
+		and module type (sas or mpe). On stid127 & stih407 there is only
+		one die/module, so there is no module type in the compatible
+		string.
+clock-names : 	Should be "thermal".
+		  See: Documentation/devicetree/bindings/resource-names.txt
+clocks : 	Phandle of the clock used by the thermal sensor.
+		  See: Documentation/devicetree/bindings/clock/clock-bindings.txt
+
+Optional parameters:
+-------------------
+
+reg : 		For non-sysconf based sensors, this should be the physical base
+		address and length of the sensor's registers.
+interrupts :	Standard way to define interrupt number.
+		Interrupt is mandatory to be defined when compatible is
+		"stih416-mpe-thermal".
+		  NB: For thermal sensor's for which no interrupt has been
+		  defined, a polling delay of 1000ms will be used to read the
+		  temperature from device.
+
+Example:
+
+	temp1@fdfe8000 {
+		compatible	= "st,stih416-mpe-thermal";
+		reg		= <0xfdfe8000 0x10>;
+		clock-names	= "thermal";
+		clocks		= <&clk_m_mpethsens>;
+		interrupts	= <GIC_SPI 23 IRQ_TYPE_NONE>;
+	};

drivers/thermal/Kconfig

···
 
 config DOVE_THERMAL
 	tristate "Temperature sensor on Marvell Dove SoCs"
-	depends on ARCH_DOVE
+	depends on ARCH_DOVE || MACH_DOVE
 	depends on OF
 	help
 	  Support for the Dove thermal sensor driver in the Linux thermal
···
 menu "Samsung thermal drivers"
 depends on ARCH_EXYNOS
 source "drivers/thermal/samsung/Kconfig"
+endmenu
+
+menu "STMicroelectronics thermal drivers"
+depends on ARCH_STI && OF
+source "drivers/thermal/st/Kconfig"
 endmenu
 
 endif

drivers/thermal/Makefile

···
 obj-$(CONFIG_INTEL_SOC_DTS_THERMAL)	+= intel_soc_dts_thermal.o
 obj-$(CONFIG_TI_SOC_THERMAL)	+= ti-soc-thermal/
 obj-$(CONFIG_ACPI_INT3403_THERMAL)	+= int3403_thermal.o
+obj-$(CONFIG_ST_THERMAL)	+= st/

drivers/thermal/cpu_cooling.c

···
  * @event: value showing cpufreq event for which this function invoked.
  * @data: callback-specific data
  *
- * Callback to highjack the notification on cpufreq policy transition.
+ * Callback to hijack the notification on cpufreq policy transition.
  * Every time there is a change in policy, we will intercept and
  * update the cpufreq policy with thermal constraints.
  *

drivers/thermal/int3403_thermal.c

···
 struct int3403_sensor {
 	struct thermal_zone_device *tzone;
 	unsigned long *thresholds;
+	unsigned long	crit_temp;
+	int		crit_trip_id;
+	unsigned long	psv_temp;
+	int		psv_trip_id;
 };
 
 static int sys_get_curr_temp(struct thermal_zone_device *tzone,
···
 	struct acpi_device *device = tzone->devdata;
 	struct int3403_sensor *obj = acpi_driver_data(device);
 
-	/*
-	 * get_trip_temp is a mandatory callback but
-	 * PATx method doesn't return any value, so return
-	 * cached value, which was last set from user space.
-	 */
-	*temp = obj->thresholds[trip];
+	if (trip == obj->crit_trip_id)
+		*temp = obj->crit_temp;
+	else if (trip == obj->psv_trip_id)
+		*temp = obj->psv_temp;
+	else {
+		/*
+		 * get_trip_temp is a mandatory callback but
+		 * PATx method doesn't return any value, so return
+		 * cached value, which was last set from user space.
+		 */
+		*temp = obj->thresholds[trip];
+	}
 
 	return 0;
 }
···
 static int sys_get_trip_type(struct thermal_zone_device *thermal,
 		int trip, enum thermal_trip_type *type)
 {
+	struct acpi_device *device = thermal->devdata;
+	struct int3403_sensor *obj = acpi_driver_data(device);
+
 	/* Mandatory callback, may not mean much here */
-	*type = THERMAL_TRIP_PASSIVE;
+	if (trip == obj->crit_trip_id)
+		*type = THERMAL_TRIP_CRITICAL;
+	else
+		*type = THERMAL_TRIP_PASSIVE;
 
 	return 0;
 }
···
 	}
 }
 
+static int sys_get_trip_crt(struct acpi_device *device, unsigned long *temp)
+{
+	unsigned long long crt;
+	acpi_status status;
+
+	status = acpi_evaluate_integer(device->handle, "_CRT", NULL, &crt);
+	if (ACPI_FAILURE(status))
+		return -EIO;
+
+	*temp = DECI_KELVIN_TO_MILLI_CELSIUS(crt, KELVIN_OFFSET);
+
+	return 0;
+}
+
+static int sys_get_trip_psv(struct acpi_device *device, unsigned long *temp)
+{
+	unsigned long long psv;
+	acpi_status status;
+
+	status = acpi_evaluate_integer(device->handle, "_PSV", NULL, &psv);
+	if (ACPI_FAILURE(status))
+		return -EIO;
+
+	*temp = DECI_KELVIN_TO_MILLI_CELSIUS(psv, KELVIN_OFFSET);
+
+	return 0;
+}
+
 static int acpi_int3403_add(struct acpi_device *device)
 {
 	int result = 0;
···
 			return -ENOMEM;
 		trip_mask = BIT(trip_cnt) - 1;
 	}
+
+	obj->psv_trip_id = -1;
+	if (!sys_get_trip_psv(device, &obj->psv_temp))
+		obj->psv_trip_id = trip_cnt++;
+
+	obj->crit_trip_id = -1;
+	if (!sys_get_trip_crt(device, &obj->crit_temp))
+		obj->crit_trip_id = trip_cnt++;
+
 	obj->tzone = thermal_zone_device_register(acpi_device_bid(device),
 				trip_cnt, trip_mask, device, &tzone_ops,
 				NULL, 0, 0);

drivers/thermal/st/Kconfig

···
+config ST_THERMAL
+       tristate "Thermal sensors on STMicroelectronics STi series of SoCs"
+       help
+         Support for thermal sensors on STMicroelectronics STi series of SoCs.
+
+config ST_THERMAL_SYSCFG
+	select ST_THERMAL
+	tristate "STi series syscfg register access based thermal sensors"
+
+config ST_THERMAL_MEMMAP
+	select ST_THERMAL
+	tristate "STi series memory mapped access based thermal sensors"

drivers/thermal/st/Makefile

···
+obj-$(CONFIG_ST_THERMAL)		:= st_thermal.o
+obj-$(CONFIG_ST_THERMAL_SYSCFG)		+= st_thermal_syscfg.o
+obj-$(CONFIG_ST_THERMAL_MEMMAP)		+= st_thermal_memmap.o

drivers/thermal/st/st_thermal.c

···
+/*
+ * ST Thermal Sensor Driver core routines
+ * Author: Ajit Pal Singh <[e-mail]>
+ *
+ * Copyright (C) 2003-2014 STMicroelectronics (R&D) Limited
+ *
+ * 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.
+ *
+ */
+
+#include <linux/clk.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+
+#include "st_thermal.h"
+
+/* The Thermal Framework expects millidegrees */
+#define mcelsius(temp)			((temp) * 1000)
+
+/*
+ * Function to allocate regfields which are common
+ * between syscfg and memory mapped based sensors
+ */
+int st_thermal_alloc_regfields(struct st_thermal_sensor *sensor)
+{
+	struct device *dev = sensor->dev;
+	struct regmap *regmap = sensor->regmap;
+	const struct reg_field *reg_fields = sensor->cdata->reg_fields;
+
+	sensor->dcorrect = devm_regmap_field_alloc(dev, regmap,
+						   reg_fields[DCORRECT]);
+
+	sensor->overflow = devm_regmap_field_alloc(dev, regmap,
+						   reg_fields[OVERFLOW]);
+
+	sensor->temp_data = devm_regmap_field_alloc(dev, regmap,
+						    reg_fields[DATA]);
+
+	if (IS_ERR(sensor->dcorrect) ||
+	    IS_ERR(sensor->overflow) ||
+	    IS_ERR(sensor->temp_data)) {
+		dev_err(dev, "failed to allocate common regfields\n");
+		return -EINVAL;
+	}
+
+	return sensor->ops->alloc_regfields(sensor);
+}
+
+static int st_thermal_sensor_on(struct st_thermal_sensor *sensor)
+{
+	int ret;
+	struct device *dev = sensor->dev;
+
+	ret = clk_prepare_enable(sensor->clk);
+	if (ret) {
+		dev_err(dev, "failed to enable clk\n");
+		return ret;
+	}
+
+	ret = sensor->ops->power_ctrl(sensor, POWER_ON);
+	if (ret) {
+		dev_err(dev, "failed to power on sensor\n");
+		clk_disable_unprepare(sensor->clk);
+	}
+
+	return ret;
+}
+
+static int st_thermal_sensor_off(struct st_thermal_sensor *sensor)
+{
+	int ret;
+
+	ret = sensor->ops->power_ctrl(sensor, POWER_OFF);
+	if (ret)
+		return ret;
+
+	clk_disable_unprepare(sensor->clk);
+
+	return 0;
+}
+
+static int st_thermal_calibration(struct st_thermal_sensor *sensor)
+{
+	int ret;
+	unsigned int val;
+	struct device *dev = sensor->dev;
+
+	/* Check if sensor calibration data is already written */
+	ret = regmap_field_read(sensor->dcorrect, &val);
+	if (ret) {
+		dev_err(dev, "failed to read calibration data\n");
+		return ret;
+	}
+
+	if (!val) {
+		/*
+		 * Sensor calibration value not set by bootloader,
+		 * default calibration data to be used
+		 */
+		ret = regmap_field_write(sensor->dcorrect,
+					 sensor->cdata->calibration_val);
+		if (ret)
+			dev_err(dev, "failed to set calibration data\n");
+	}
+
+	return ret;
+}
+
+/* Callback to get temperature from HW*/
+static int st_thermal_get_temp(struct thermal_zone_device *th,
+		unsigned long *temperature)
+{
+	struct st_thermal_sensor *sensor = th->devdata;
+	struct device *dev = sensor->dev;
+	unsigned int temp;
+	unsigned int overflow;
+	int ret;
+
+	ret = regmap_field_read(sensor->overflow, &overflow);
+	if (ret)
+		return ret;
+	if (overflow)
+		return -EIO;
+
+	ret = regmap_field_read(sensor->temp_data, &temp);
+	if (ret)
+		return ret;
+
+	temp += sensor->cdata->temp_adjust_val;
+	temp = mcelsius(temp);
+
+	dev_dbg(dev, "temperature: %d\n", temp);
+
+	*temperature = temp;
+
+	return 0;
+}
+
+static int st_thermal_get_trip_type(struct thermal_zone_device *th,
+				int trip, enum thermal_trip_type *type)
+{
+	struct st_thermal_sensor *sensor = th->devdata;
+	struct device *dev = sensor->dev;
+
+	switch (trip) {
+	case 0:
+		*type = THERMAL_TRIP_CRITICAL;
+		break;
+	default:
+		dev_err(dev, "invalid trip point\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int st_thermal_get_trip_temp(struct thermal_zone_device *th,
+				    int trip, unsigned long *temp)
+{
+	struct st_thermal_sensor *sensor = th->devdata;
+	struct device *dev = sensor->dev;
+
+	switch (trip) {
+	case 0:
+		*temp = mcelsius(sensor->cdata->crit_temp);
+		break;
+	default:
+		dev_err(dev, "Invalid trip point\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static struct thermal_zone_device_ops st_tz_ops = {
+	.get_temp	= st_thermal_get_temp,
+	.get_trip_type	= st_thermal_get_trip_type,
+	.get_trip_temp	= st_thermal_get_trip_temp,
+};
+
+int st_thermal_register(struct platform_device *pdev,
+			const struct of_device_id *st_thermal_of_match)
+{
+	struct st_thermal_sensor *sensor;
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	const struct of_device_id *match;
+
+	int polling_delay;
+	int ret;
+
+	if (!np) {
+		dev_err(dev, "device tree node not found\n");
+		return -EINVAL;
+	}
+
+	sensor = devm_kzalloc(dev, sizeof(*sensor), GFP_KERNEL);
+	if (!sensor)
+		return -ENOMEM;
+
+	sensor->dev = dev;
+
+	match = of_match_device(st_thermal_of_match, dev);
+	if (!(match && match->data))
+		return -EINVAL;
+
+	sensor->cdata = match->data;
+	if (!sensor->cdata->ops)
+		return -EINVAL;
+
+	sensor->ops = sensor->cdata->ops;
+
+	ret = sensor->ops->regmap_init(sensor);
+	if (ret)
+		return ret;
+
+	ret = st_thermal_alloc_regfields(sensor);
+	if (ret)
+		return ret;
+
+	sensor->clk = devm_clk_get(dev, "thermal");
+	if (IS_ERR(sensor->clk)) {
+		dev_err(dev, "failed to fetch clock\n");
+		return PTR_ERR(sensor->clk);
+	}
+
+	if (sensor->ops->register_enable_irq) {
+		ret = sensor->ops->register_enable_irq(sensor);
+		if (ret)
+			return ret;
+	}
+
+	ret = st_thermal_sensor_on(sensor);
+	if (ret)
+		return ret;
+
+	ret = st_thermal_calibration(sensor);
+	if (ret)
+		goto sensor_off;
+
+	polling_delay = sensor->ops->register_enable_irq ? 0 : 1000;
+
+	sensor->thermal_dev =
+		thermal_zone_device_register(dev_name(dev), 1, 0, sensor,
+					     &st_tz_ops, NULL, 0, polling_delay);
+	if (IS_ERR(sensor->thermal_dev)) {
+		dev_err(dev, "failed to register thermal zone device\n");
+		ret = PTR_ERR(sensor->thermal_dev);
+		goto sensor_off;
+	}
+
+	platform_set_drvdata(pdev, sensor);
+
+	return 0;
+
+sensor_off:
+	st_thermal_sensor_off(sensor);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(st_thermal_register);
+
+int st_thermal_unregister(struct platform_device *pdev)
+{
+	struct st_thermal_sensor *sensor = platform_get_drvdata(pdev);
+
+	st_thermal_sensor_off(sensor);
+	thermal_zone_device_unregister(sensor->thermal_dev);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(st_thermal_unregister);
+
+static int st_thermal_suspend(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct st_thermal_sensor *sensor = platform_get_drvdata(pdev);
+
+	return st_thermal_sensor_off(sensor);
+}
+
+static int st_thermal_resume(struct device *dev)
+{
+	int ret;
+	struct platform_device *pdev = to_platform_device(dev);
+	struct st_thermal_sensor *sensor = platform_get_drvdata(pdev);
+
+	ret = st_thermal_sensor_on(sensor);
+	if (ret)
+		return ret;
+
+	ret = st_thermal_calibration(sensor);
+	if (ret)
+		return ret;
+
+	if (sensor->ops->enable_irq) {
+		ret = sensor->ops->enable_irq(sensor);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+SIMPLE_DEV_PM_OPS(st_thermal_pm_ops, st_thermal_suspend, st_thermal_resume);
+EXPORT_SYMBOL_GPL(st_thermal_pm_ops);
+
+MODULE_AUTHOR("STMicroelectronics (R&D) Limited <[e-mail]>");
+MODULE_DESCRIPTION("STMicroelectronics STi SoC Thermal Sensor Driver");
+MODULE_LICENSE("GPL v2");

drivers/thermal/st/st_thermal.h

···
+/*
+ * ST Thermal Sensor Driver for STi series of SoCs
+ * Author: Ajit Pal Singh <[e-mail]>
+ *
+ * Copyright (C) 2003-2014 STMicroelectronics (R&D) Limited
+ *
+ * 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.
+ */
+
+#ifndef __STI_THERMAL_SYSCFG_H
+#define __STI_THERMAL_SYSCFG_H
+
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/thermal.h>
+
+enum st_thermal_regfield_ids {
+	INT_THRESH_HI = 0, /* Top two regfield IDs are mutually exclusive */
+	TEMP_PWR = 0,
+	DCORRECT,
+	OVERFLOW,
+	DATA,
+	INT_ENABLE,
+
+	MAX_REGFIELDS
+};
+
+/* Thermal sensor power states */
+enum st_thermal_power_state {
+	POWER_OFF = 0,
+	POWER_ON
+};
+
+struct st_thermal_sensor;
+
+/**
+ * Description of private thermal sensor ops.
+ *
+ * @power_ctrl:		Function for powering on/off a sensor. Clock to the
+ *			sensor is also controlled from this function.
+ * @alloc_regfields: 	Allocate regmap register fields, specific to a sensor.
+ * @do_memmap_regmap: 	Memory map the thermal register space and init regmap
+ *			instance or find regmap instance.
+ * @register_irq: 	Register an interrupt handler for a sensor.
+ */
+struct st_thermal_sensor_ops {
+	int (*power_ctrl)(struct st_thermal_sensor *, enum st_thermal_power_state);
+	int (*alloc_regfields)(struct st_thermal_sensor *);
+	int (*regmap_init)(struct st_thermal_sensor *);
+	int (*register_enable_irq)(struct st_thermal_sensor *);
+	int (*enable_irq)(struct st_thermal_sensor *);
+};
+
+/**
+ * Description of thermal driver compatible data.
+ *
+ * @reg_fields:		Pointer to the regfields array for a sensor.
+ * @sys_compat:		Pointer to the syscon node compatible string.
+ * @ops: 		Pointer to private thermal ops for a sensor.
+ * @calibration_val: 	Default calibration value to be written to the DCORRECT
+ *			register field for a sensor.
+ * @temp_adjust_val: 	Value to be added/subtracted from the data read from
+ *			the sensor. If value needs to be added please provide a
+ *			positive value and if it is to be subtracted please
+ * 			provide a negative value.
+ * @crit_temp: 		The temperature beyond which the SoC should be shutdown
+ * 			to prevent damage.
+ */
+struct st_thermal_compat_data {
+	char *sys_compat;
+	const struct reg_field *reg_fields;
+	const struct st_thermal_sensor_ops *ops;
+	unsigned int calibration_val;
+	int temp_adjust_val;
+	int crit_temp;
+};
+
+struct st_thermal_sensor {
+	struct device *dev;
+	struct thermal_zone_device *thermal_dev;
+	const struct st_thermal_sensor_ops *ops;
+	const struct st_thermal_compat_data *cdata;
+	struct clk *clk;
+	struct regmap *regmap;
+	struct regmap_field *pwr;
+	struct regmap_field *dcorrect;
+	struct regmap_field *overflow;
+	struct regmap_field *temp_data;
+	struct regmap_field *int_thresh_hi;
+	struct regmap_field *int_enable;
+	int irq;
+	void __iomem *mmio_base;
+};
+
+extern int st_thermal_register(struct platform_device *pdev,
+			       const struct of_device_id *st_thermal_of_match);
+extern int st_thermal_unregister(struct platform_device *pdev);
+extern const struct dev_pm_ops st_thermal_pm_ops;
+
+#endif /* __STI_RESET_SYSCFG_H */

drivers/thermal/st/st_thermal_memmap.c

···
+/*
+ * ST Thermal Sensor Driver for memory mapped sensors.
+ * Author: Ajit Pal Singh <[e-mail]>
+ *
+ * Copyright (C) 2003-2014 STMicroelectronics (R&D) Limited
+ *
+ * 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.
+ */
+
+#include <linux/of.h>
+#include <linux/module.h>
+
+#include "st_thermal.h"
+
+#define STIH416_MPE_CONF			0x0
+#define STIH416_MPE_STATUS			0x4
+#define STIH416_MPE_INT_THRESH			0x8
+#define STIH416_MPE_INT_EN			0xC
+
+/* Power control bits for the memory mapped thermal sensor */
+#define THERMAL_PDN				BIT(4)
+#define THERMAL_SRSTN				BIT(10)
+
+static const struct reg_field st_mmap_thermal_regfields[MAX_REGFIELDS] = {
+	/*
+	 * According to the STIH416 MPE temp sensor data sheet -
+	 * the PDN (Power Down Bit) and SRSTN (Soft Reset Bit) need to be
+	 * written simultaneously for powering on and off the temperature
+	 * sensor. regmap_update_bits() will be used to update the register.
+	 */
+	[INT_THRESH_HI]	= REG_FIELD(STIH416_MPE_INT_THRESH, 	0,  7),
+	[DCORRECT]	= REG_FIELD(STIH416_MPE_CONF,		5,  9),
+	[OVERFLOW]	= REG_FIELD(STIH416_MPE_STATUS,		9,  9),
+	[DATA]		= REG_FIELD(STIH416_MPE_STATUS,		11, 18),
+	[INT_ENABLE]	= REG_FIELD(STIH416_MPE_INT_EN,		0,  0),
+};
+
+static irqreturn_t st_mmap_thermal_trip_handler(int irq, void *sdata)
+{
+	struct st_thermal_sensor *sensor = sdata;
+
+	thermal_zone_device_update(sensor->thermal_dev);
+
+	return IRQ_HANDLED;
+}
+
+/* Private ops for the Memory Mapped based thermal sensors */
+static int st_mmap_power_ctrl(struct st_thermal_sensor *sensor,
+			      enum st_thermal_power_state power_state)
+{
+	const unsigned int mask = (THERMAL_PDN | THERMAL_SRSTN);
+	const unsigned int val = power_state ? mask : 0;
+
+	return regmap_update_bits(sensor->regmap, STIH416_MPE_CONF, mask, val);
+}
+
+static int st_mmap_alloc_regfields(struct st_thermal_sensor *sensor)
+{
+	struct device *dev = sensor->dev;
+	struct regmap *regmap = sensor->regmap;
+	const struct reg_field *reg_fields = sensor->cdata->reg_fields;
+
+	sensor->int_thresh_hi = devm_regmap_field_alloc(dev, regmap,
+						reg_fields[INT_THRESH_HI]);
+	sensor->int_enable = devm_regmap_field_alloc(dev, regmap,
+						reg_fields[INT_ENABLE]);
+
+	if (IS_ERR(sensor->int_thresh_hi) || IS_ERR(sensor->int_enable)) {
+		dev_err(dev, "failed to alloc mmap regfields\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int st_mmap_enable_irq(struct st_thermal_sensor *sensor)
+{
+	int ret;
+
+	/* Set upper critical threshold */
+	ret = regmap_field_write(sensor->int_thresh_hi,
+				 sensor->cdata->crit_temp -
+				 sensor->cdata->temp_adjust_val);
+	if (ret)
+		return ret;
+
+	return regmap_field_write(sensor->int_enable, 1);
+}
+
+static int st_mmap_register_enable_irq(struct st_thermal_sensor *sensor)
+{
+	struct device *dev = sensor->dev;
+	struct platform_device *pdev = to_platform_device(dev);
+	int ret;
+
+	sensor->irq = platform_get_irq(pdev, 0);
+	if (sensor->irq < 0) {
+		dev_err(dev, "failed to register IRQ\n");
+		return sensor->irq;
+	}
+
+	ret = devm_request_threaded_irq(dev, sensor->irq,
+					NULL, st_mmap_thermal_trip_handler,
+					IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+					dev->driver->name, sensor);
+	if (ret) {
+		dev_err(dev, "failed to register IRQ %d\n", sensor->irq);
+		return ret;
+	}
+
+	return st_mmap_enable_irq(sensor);
+}
+
+static const struct regmap_config st_416mpe_regmap_config = {
+	.reg_bits = 32,
+	.val_bits = 32,
+	.reg_stride = 4,
+};
+
+static int st_mmap_regmap_init(struct st_thermal_sensor *sensor)
+{
+	struct device *dev = sensor->dev;
+	struct platform_device *pdev = to_platform_device(dev);
+	struct resource *res;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		dev_err(dev, "no memory resources defined\n");
+		return -ENODEV;
+	}
+
+	sensor->mmio_base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(sensor->mmio_base)) {
+		dev_err(dev, "failed to remap IO\n");
+		return PTR_ERR(sensor->mmio_base);
+	}
+
+	sensor->regmap = devm_regmap_init_mmio(dev, sensor->mmio_base,
+				&st_416mpe_regmap_config);
+	if (IS_ERR(sensor->regmap)) {
+		dev_err(dev, "failed to initialise regmap\n");
+		return PTR_ERR(sensor->regmap);
+	}
+
+	return 0;
+}
+
+static const struct st_thermal_sensor_ops st_mmap_sensor_ops = {
+	.power_ctrl		= st_mmap_power_ctrl,
+	.alloc_regfields	= st_mmap_alloc_regfields,
+	.regmap_init		= st_mmap_regmap_init,
+	.register_enable_irq	= st_mmap_register_enable_irq,
+	.enable_irq		= st_mmap_enable_irq,
+};
+
+/* Compatible device data stih416 mpe thermal sensor */
+const struct st_thermal_compat_data st_416mpe_cdata = {
+	.reg_fields		= st_mmap_thermal_regfields,
+	.ops			= &st_mmap_sensor_ops,
+	.calibration_val	= 14,
+	.temp_adjust_val	= -95,
+	.crit_temp		= 120,
+};
+
+/* Compatible device data stih407 thermal sensor */
+const struct st_thermal_compat_data st_407_cdata = {
+	.reg_fields		= st_mmap_thermal_regfields,
+	.ops			= &st_mmap_sensor_ops,
+	.calibration_val	= 16,
+	.temp_adjust_val	= -95,
+	.crit_temp		= 120,
+};
+
+static struct of_device_id st_mmap_thermal_of_match[] = {
+	{ .compatible = "st,stih416-mpe-thermal", .data = &st_416mpe_cdata },
+	{ .compatible = "st,stih407-thermal",     .data = &st_407_cdata },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, st_mmap_thermal_of_match);
+
+int st_mmap_probe(struct platform_device *pdev)
+{
+	return st_thermal_register(pdev,  st_mmap_thermal_of_match);
+}
+
+int st_mmap_remove(struct platform_device *pdev)
+{
+	return st_thermal_unregister(pdev);
+}
+
+static struct platform_driver st_mmap_thermal_driver = {
+	.driver = {
+		.name	= "st_thermal_mmap",
+		.owner  = THIS_MODULE,
+		.pm     = &st_thermal_pm_ops,
+		.of_match_table = st_mmap_thermal_of_match,
+	},
+	.probe		= st_mmap_probe,
+	.remove		= st_mmap_remove,
+};
+
+module_platform_driver(st_mmap_thermal_driver);
+
+MODULE_AUTHOR("STMicroelectronics (R&D) Limited <[e-mail]>");
+MODULE_DESCRIPTION("STMicroelectronics STi SoC Thermal Sensor Driver");
+MODULE_LICENSE("GPL v2");

drivers/thermal/st/st_thermal_syscfg.c

···
+/*
+ * ST Thermal Sensor Driver for syscfg based sensors.
+ * Author: Ajit Pal Singh <[e-mail]>
+ *
+ * Copyright (C) 2003-2014 STMicroelectronics (R&D) Limited
+ *
+ * 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.
+ */
+
+#include <linux/of.h>
+#include <linux/module.h>
+#include <linux/mfd/syscon.h>
+
+#include "st_thermal.h"
+
+/* STiH415 */
+#define STIH415_SYSCFG_FRONT(num)		((num - 100) * 4)
+#define STIH415_SAS_THSENS_CONF			STIH415_SYSCFG_FRONT(178)
+#define STIH415_SAS_THSENS_STATUS		STIH415_SYSCFG_FRONT(198)
+#define STIH415_SYSCFG_MPE(num)			((num - 600) * 4)
+#define STIH415_MPE_THSENS_CONF			STIH415_SYSCFG_MPE(607)
+#define STIH415_MPE_THSENS_STATUS		STIH415_SYSCFG_MPE(667)
+
+/* STiH416 */
+#define STIH416_SYSCFG_FRONT(num)		((num - 1000) * 4)
+#define STIH416_SAS_THSENS_CONF			STIH416_SYSCFG_FRONT(1552)
+#define STIH416_SAS_THSENS_STATUS1		STIH416_SYSCFG_FRONT(1554)
+#define STIH416_SAS_THSENS_STATUS2		STIH416_SYSCFG_FRONT(1594)
+
+/* STiD127 */
+#define STID127_SYSCFG_CPU(num)			((num - 700) * 4)
+#define STID127_THSENS_CONF			STID127_SYSCFG_CPU(743)
+#define STID127_THSENS_STATUS			STID127_SYSCFG_CPU(767)
+
+static const struct reg_field st_415sas_regfields[MAX_REGFIELDS] = {
+	[TEMP_PWR] = REG_FIELD(STIH415_SAS_THSENS_CONF,   9,  9),
+	[DCORRECT] = REG_FIELD(STIH415_SAS_THSENS_CONF,   4,  8),
+	[OVERFLOW] = REG_FIELD(STIH415_SAS_THSENS_STATUS, 8,  8),
+	[DATA] 	   = REG_FIELD(STIH415_SAS_THSENS_STATUS, 10, 16),
+};
+
+static const struct reg_field st_415mpe_regfields[MAX_REGFIELDS] = {
+	[TEMP_PWR] = REG_FIELD(STIH415_MPE_THSENS_CONF,   8,  8),
+	[DCORRECT] = REG_FIELD(STIH415_MPE_THSENS_CONF,   3,  7),
+	[OVERFLOW] = REG_FIELD(STIH415_MPE_THSENS_STATUS, 9,  9),
+	[DATA]     = REG_FIELD(STIH415_MPE_THSENS_STATUS, 11, 18),
+};
+
+static const struct reg_field st_416sas_regfields[MAX_REGFIELDS] = {
+	[TEMP_PWR] = REG_FIELD(STIH416_SAS_THSENS_CONF,    9,  9),
+	[DCORRECT] = REG_FIELD(STIH416_SAS_THSENS_CONF,    4,  8),
+	[OVERFLOW] = REG_FIELD(STIH416_SAS_THSENS_STATUS1, 8,  8),
+	[DATA]     = REG_FIELD(STIH416_SAS_THSENS_STATUS2, 10, 16),
+};
+
+static const struct reg_field st_127_regfields[MAX_REGFIELDS] = {
+	[TEMP_PWR] = REG_FIELD(STID127_THSENS_CONF,   7,  7),
+	[DCORRECT] = REG_FIELD(STID127_THSENS_CONF,   2,  6),
+	[OVERFLOW] = REG_FIELD(STID127_THSENS_STATUS, 9,  9),
+	[DATA]     = REG_FIELD(STID127_THSENS_STATUS, 11, 18),
+};
+
+/* Private OPs for System Configuration Register based thermal sensors */
+static int st_syscfg_power_ctrl(struct st_thermal_sensor *sensor,
+				enum st_thermal_power_state power_state)
+{
+	return regmap_field_write(sensor->pwr, power_state);
+}
+
+static int st_syscfg_alloc_regfields(struct st_thermal_sensor *sensor)
+{
+	struct device *dev = sensor->dev;
+
+	sensor->pwr = devm_regmap_field_alloc(dev, sensor->regmap,
+					sensor->cdata->reg_fields[TEMP_PWR]);
+
+	if (IS_ERR(sensor->pwr)) {
+		dev_err(dev, "failed to alloc syscfg regfields\n");
+		return PTR_ERR(sensor->pwr);
+	}
+
+	return 0;
+}
+
+static int st_syscfg_regmap_init(struct st_thermal_sensor *sensor)
+{
+	sensor->regmap =
+		syscon_regmap_lookup_by_compatible(sensor->cdata->sys_compat);
+	if (IS_ERR(sensor->regmap)) {
+		dev_err(sensor->dev, "failed to find syscfg regmap\n");
+		return PTR_ERR(sensor->regmap);
+	}
+
+	return 0;
+}
+
+static const struct st_thermal_sensor_ops st_syscfg_sensor_ops = {
+	.power_ctrl		= st_syscfg_power_ctrl,
+	.alloc_regfields	= st_syscfg_alloc_regfields,
+	.regmap_init		= st_syscfg_regmap_init,
+};
+
+/* Compatible device data for stih415 sas thermal sensor */
+const struct st_thermal_compat_data st_415sas_cdata = {
+	.sys_compat		= "st,stih415-front-syscfg",
+	.reg_fields		= st_415sas_regfields,
+	.ops			= &st_syscfg_sensor_ops,
+	.calibration_val	= 16,
+	.temp_adjust_val	= 20,
+	.crit_temp		= 120,
+};
+
+/* Compatible device data for stih415 mpe thermal sensor */
+const struct st_thermal_compat_data st_415mpe_cdata = {
+	.sys_compat		= "st,stih415-system-syscfg",
+	.reg_fields		= st_415mpe_regfields,
+	.ops			= &st_syscfg_sensor_ops,
+	.calibration_val	= 16,
+	.temp_adjust_val	= -103,
+	.crit_temp		= 120,
+};
+
+/* Compatible device data for stih416 sas thermal sensor */
+const struct st_thermal_compat_data st_416sas_cdata = {
+	.sys_compat		= "st,stih416-front-syscfg",
+	.reg_fields		= st_416sas_regfields,
+	.ops			= &st_syscfg_sensor_ops,
+	.calibration_val	= 16,
+	.temp_adjust_val	= 20,
+	.crit_temp		= 120,
+};
+
+/* Compatible device data for stid127 thermal sensor */
+const struct st_thermal_compat_data st_127_cdata = {
+	.sys_compat		= "st,stid127-cpu-syscfg",
+	.reg_fields		= st_127_regfields,
+	.ops			= &st_syscfg_sensor_ops,
+	.calibration_val	= 8,
+	.temp_adjust_val	= -103,
+	.crit_temp		= 120,
+};
+
+static struct of_device_id st_syscfg_thermal_of_match[] = {
+	{ .compatible = "st,stih415-sas-thermal", .data = &st_415sas_cdata },
+	{ .compatible = "st,stih415-mpe-thermal", .data = &st_415mpe_cdata },
+	{ .compatible = "st,stih416-sas-thermal", .data = &st_416sas_cdata },
+	{ .compatible = "st,stid127-thermal",     .data = &st_127_cdata },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, st_syscfg_thermal_of_match);
+
+int st_syscfg_probe(struct platform_device *pdev)
+{
+	return st_thermal_register(pdev, st_syscfg_thermal_of_match);
+}
+
+int st_syscfg_remove(struct platform_device *pdev)
+{
+	return st_thermal_unregister(pdev);
+}
+
+static struct platform_driver st_syscfg_thermal_driver = {
+	.driver = {
+		.name	= "st_syscfg_thermal",
+		.owner  = THIS_MODULE,
+		.pm     = &st_thermal_pm_ops,
+		.of_match_table =  st_syscfg_thermal_of_match,
+	},
+	.probe		= st_syscfg_probe,
+	.remove		= st_syscfg_remove,
+};
+module_platform_driver(st_syscfg_thermal_driver);
+
+MODULE_AUTHOR("STMicroelectronics (R&D) Limited <[e-mail]>");
+MODULE_DESCRIPTION("STMicroelectronics STi SoC Thermal Sensor Driver");
+MODULE_LICENSE("GPL v2");

include/linux/thermal.h

···
 	char name[THERMAL_NAME_LENGTH];
 };
 
+/**
+ * struct thermal_zone_device - structure for a thermal zone
+ * @id:		unique id number for each thermal zone
+ * @type:	the thermal zone device type
+ * @device:	&struct device for this thermal zone
+ * @trip_temp_attrs:	attributes for trip points for sysfs: trip temperature
+ * @trip_type_attrs:	attributes for trip points for sysfs: trip type
+ * @trip_hyst_attrs:	attributes for trip points for sysfs: trip hysteresis
+ * @devdata:	private pointer for device private data
+ * @trips:	number of trip points the thermal zone supports
+ * @passive_delay:	number of milliseconds to wait between polls when
+ *			performing passive cooling.  Currenty only used by the
+ *			step-wise governor
+ * @polling_delay:	number of milliseconds to wait between polls when
+ *			checking whether trip points have been crossed (0 for
+ *			interrupt driven systems)
+ * @temperature:	current temperature.  This is only for core code,
+ *			drivers should use thermal_zone_get_temp() to get the
+ *			current temperature
+ * @last_temperature:	previous temperature read
+ * @emul_temperature:	emulated temperature when using CONFIG_THERMAL_EMULATION
+ * @passive:		1 if you've crossed a passive trip point, 0 otherwise.
+ *			Currenty only used by the step-wise governor.
+ * @forced_passive:	If > 0, temperature at which to switch on all ACPI
+ *			processor cooling devices.  Currently only used by the
+ *			step-wise governor.
+ * @ops:	operations this &thermal_zone_device supports
+ * @tzp:	thermal zone parameters
+ * @governor:	pointer to the governor for this thermal zone
+ * @thermal_instances:	list of &struct thermal_instance of this thermal zone
+ * @idr:	&struct idr to generate unique id for this zone's cooling
+ *		devices
+ * @lock:	lock to protect thermal_instances list
+ * @node:	node in thermal_tz_list (in thermal_core.c)
+ * @poll_queue:	delayed work for polling
+ */
 struct thermal_zone_device {
 	int id;
 	char type[THERMAL_NAME_LENGTH];
···
 	struct thermal_governor *governor;
 	struct list_head thermal_instances;
 	struct idr idr;
-	struct mutex lock; /* protect thermal_instances list */
+	struct mutex lock;
 	struct list_head node;
 	struct delayed_work poll_queue;
 };
 
-/* Structure that holds thermal governor information */
+/**
+ * struct thermal_governor - structure that holds thermal governor information
+ * @name:	name of the governor
+ * @throttle:	callback called for every trip point even if temperature is
+ *		below the trip point temperature
+ * @governor_list:	node in thermal_governor_list (in thermal_core.c)
+ */
 struct thermal_governor {
 	char name[THERMAL_NAME_LENGTH];
 	int (*throttle)(struct thermal_zone_device *tz, int trip);