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Commit 62ebb7b1 authored by Zhang Rui's avatar Zhang Rui
Browse files

Merge branch 'next' of... 

Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal into eduardo-soc
parents 52addcf9 3c94f17e

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

+4 −1
Original line number Diff line number Diff line 
* Temperature Monitor (TEMPMON) on Freescale i.MX SoCs



Required properties:

- compatible : "fsl,imx6q-thermal"

- compatible : "fsl,imx6q-tempmon" for i.MX6Q, "fsl,imx6sx-tempmon" for i.MX6SX.

  i.MX6SX has two more IRQs than i.MX6Q, one is IRQ_LOW and the other is IRQ_PANIC,

  when temperature is below than low threshold, IRQ_LOW will be triggered, when temperature

  is higher than panic threshold, system will auto reboot by SRC module.

- fsl,tempmon : phandle pointer to system controller that contains TEMPMON

  control registers, e.g. ANATOP on imx6q.

- fsl,tempmon-data : phandle pointer to fuse controller that contains TEMPMON

drivers/thermal/fair_share.c

+12 −0
Original line number Diff line number Diff line
@@ -23,6 +23,7 @@ 
 */



#include <linux/thermal.h>

#include <trace/events/thermal.h>



#include "thermal_core.h"
@@ -34,6 +35,7 @@ static int get_trip_level(struct thermal_zone_device *tz) 
{

	int count = 0;

	unsigned long trip_temp;

	enum thermal_trip_type trip_type;



	if (tz->trips == 0 || !tz->ops->get_trip_temp)

		return 0;
@@ -43,6 +45,16 @@ static int get_trip_level(struct thermal_zone_device *tz) 
		if (tz->temperature < trip_temp)

			break;

	}



	/*

	 * count > 0 only if temperature is greater than first trip

	 * point, in which case, trip_point = count - 1

	 */

	if (count > 0) {

		tz->ops->get_trip_type(tz, count - 1, &trip_type);

		trace_thermal_zone_trip(tz, count - 1, trip_type);

	}



	return count;

}

drivers/thermal/imx_thermal.c

+78 −13
Original line number Diff line number Diff line
@@ -19,6 +19,7 @@ 
#include <linux/mfd/syscon.h>

#include <linux/module.h>

#include <linux/of.h>

#include <linux/of_device.h>

#include <linux/platform_device.h>

#include <linux/regmap.h>

#include <linux/slab.h>
@@ -31,6 +32,11 @@ 


#define MISC0				0x0150

#define MISC0_REFTOP_SELBIASOFF		(1 << 3)

#define MISC1				0x0160

#define MISC1_IRQ_TEMPHIGH		(1 << 29)

/* Below LOW and PANIC bits are only for TEMPMON_IMX6SX */

#define MISC1_IRQ_TEMPLOW		(1 << 28)

#define MISC1_IRQ_TEMPPANIC		(1 << 27)



#define TEMPSENSE0			0x0180

#define TEMPSENSE0_ALARM_VALUE_SHIFT	20
@@ -43,6 +49,12 @@ 


#define TEMPSENSE1			0x0190

#define TEMPSENSE1_MEASURE_FREQ		0xffff

/* Below TEMPSENSE2 is only for TEMPMON_IMX6SX */

#define TEMPSENSE2			0x0290

#define TEMPSENSE2_LOW_VALUE_SHIFT	0

#define TEMPSENSE2_LOW_VALUE_MASK	0xfff

#define TEMPSENSE2_PANIC_VALUE_SHIFT	16

#define TEMPSENSE2_PANIC_VALUE_MASK	0xfff0000



#define OCOTP_ANA1			0x04e0
@@ -66,6 +78,21 @@ enum imx_thermal_trip { 
#define FACTOR1				15976

#define FACTOR2				4297157



#define TEMPMON_IMX6Q			1

#define TEMPMON_IMX6SX			2



struct thermal_soc_data {

	u32 version;

};



static struct thermal_soc_data thermal_imx6q_data = {

	.version = TEMPMON_IMX6Q,

};



static struct thermal_soc_data thermal_imx6sx_data = {

	.version = TEMPMON_IMX6SX,

};



struct imx_thermal_data {

	struct thermal_zone_device *tz;

	struct thermal_cooling_device *cdev;
@@ -79,8 +106,21 @@ struct imx_thermal_data { 
	bool irq_enabled;

	int irq;

	struct clk *thermal_clk;

	const struct thermal_soc_data *socdata;

};



static void imx_set_panic_temp(struct imx_thermal_data *data,

			       signed long panic_temp)

{

	struct regmap *map = data->tempmon;

	int critical_value;



	critical_value = (data->c2 - panic_temp) / data->c1;

	regmap_write(map, TEMPSENSE2 + REG_CLR, TEMPSENSE2_PANIC_VALUE_MASK);

	regmap_write(map, TEMPSENSE2 + REG_SET, critical_value <<

			TEMPSENSE2_PANIC_VALUE_SHIFT);

}



static void imx_set_alarm_temp(struct imx_thermal_data *data,

			       signed long alarm_temp)

{
@@ -142,14 +182,18 @@ static int imx_get_temp(struct thermal_zone_device *tz, unsigned long *temp) 
	/* See imx_get_sensor_data() for formula derivation */

	*temp = data->c2 - n_meas * data->c1;



	/* Update alarm value to next higher trip point */

	if (data->alarm_temp == data->temp_passive && *temp >= data->temp_passive)

	/* Update alarm value to next higher trip point for TEMPMON_IMX6Q */

	if (data->socdata->version == TEMPMON_IMX6Q) {

		if (data->alarm_temp == data->temp_passive &&

			*temp >= data->temp_passive)

			imx_set_alarm_temp(data, data->temp_critical);

	if (data->alarm_temp == data->temp_critical && *temp < data->temp_passive) {

		if (data->alarm_temp == data->temp_critical &&

			*temp < data->temp_passive) {

			imx_set_alarm_temp(data, data->temp_passive);

			dev_dbg(&tz->device, "thermal alarm off: T < %lu\n",

				data->alarm_temp / 1000);

		}

	}



	if (*temp != data->last_temp) {

		dev_dbg(&tz->device, "millicelsius: %ld\n", *temp);
@@ -398,8 +442,17 @@ static irqreturn_t imx_thermal_alarm_irq_thread(int irq, void *dev) 
	return IRQ_HANDLED;

}



static const struct of_device_id of_imx_thermal_match[] = {

	{ .compatible = "fsl,imx6q-tempmon", .data = &thermal_imx6q_data, },

	{ .compatible = "fsl,imx6sx-tempmon", .data = &thermal_imx6sx_data, },

	{ /* end */ }

};

MODULE_DEVICE_TABLE(of, of_imx_thermal_match);



static int imx_thermal_probe(struct platform_device *pdev)

{

	const struct of_device_id *of_id =

		of_match_device(of_imx_thermal_match, &pdev->dev);

	struct imx_thermal_data *data;

	struct cpumask clip_cpus;

	struct regmap *map;
@@ -418,6 +471,20 @@ static int imx_thermal_probe(struct platform_device *pdev) 
	}

	data->tempmon = map;



	data->socdata = of_id->data;



	/* make sure the IRQ flag is clear before enabling irq on i.MX6SX */

	if (data->socdata->version == TEMPMON_IMX6SX) {

		regmap_write(map, MISC1 + REG_CLR, MISC1_IRQ_TEMPHIGH |

			MISC1_IRQ_TEMPLOW | MISC1_IRQ_TEMPPANIC);

		/*

		 * reset value of LOW ALARM is incorrect, set it to lowest

		 * value to avoid false trigger of low alarm.

		 */

		regmap_write(map, TEMPSENSE2 + REG_SET,

			TEMPSENSE2_LOW_VALUE_MASK);

	}



	data->irq = platform_get_irq(pdev, 0);

	if (data->irq < 0)

		return data->irq;
@@ -489,6 +556,10 @@ static int imx_thermal_probe(struct platform_device *pdev) 
	measure_freq = DIV_ROUND_UP(32768, 10); /* 10 Hz */

	regmap_write(map, TEMPSENSE1 + REG_SET, measure_freq);

	imx_set_alarm_temp(data, data->temp_passive);



	if (data->socdata->version == TEMPMON_IMX6SX)

		imx_set_panic_temp(data, data->temp_critical);



	regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_POWER_DOWN);

	regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_MEASURE_TEMP);
@@ -550,12 +621,6 @@ static int imx_thermal_resume(struct device *dev) 
static SIMPLE_DEV_PM_OPS(imx_thermal_pm_ops,

			 imx_thermal_suspend, imx_thermal_resume);



static const struct of_device_id of_imx_thermal_match[] = {

	{ .compatible = "fsl,imx6q-tempmon", },

	{ /* end */ }

};

MODULE_DEVICE_TABLE(of, of_imx_thermal_match);



static struct platform_driver imx_thermal = {

	.driver = {

		.name	= "imx_thermal",

drivers/thermal/of-thermal.c

+12 −0
Original line number Diff line number Diff line
@@ -401,6 +401,10 @@ thermal_zone_of_sensor_register(struct device *dev, int sensor_id, 
		struct of_phandle_args sensor_specs;

		int ret, id;



		/* Check whether child is enabled or not */

		if (!of_device_is_available(child))

			continue;



		/* For now, thermal framework supports only 1 sensor per zone */

		ret = of_parse_phandle_with_args(child, "thermal-sensors",

						 "#thermal-sensor-cells",
@@ -771,6 +775,10 @@ int __init of_parse_thermal_zones(void) 
		struct thermal_zone_device *zone;

		struct thermal_zone_params *tzp;



		/* Check whether child is enabled or not */

		if (!of_device_is_available(child))

			continue;



		tz = thermal_of_build_thermal_zone(child);

		if (IS_ERR(tz)) {

			pr_err("failed to build thermal zone %s: %ld\n",
@@ -838,6 +846,10 @@ void of_thermal_destroy_zones(void) 
	for_each_child_of_node(np, child) {

		struct thermal_zone_device *zone;



		/* Check whether child is enabled or not */

		if (!of_device_is_available(child))

			continue;



		zone = thermal_zone_get_zone_by_name(child->name);

		if (IS_ERR(zone))

			continue;

drivers/thermal/step_wise.c

+4 −1
Original line number Diff line number Diff line
@@ -23,6 +23,7 @@ 
 */



#include <linux/thermal.h>

#include <trace/events/thermal.h>



#include "thermal_core.h"
@@ -129,8 +130,10 @@ static void thermal_zone_trip_update(struct thermal_zone_device *tz, int trip) 


	trend = get_tz_trend(tz, trip);



	if (tz->temperature >= trip_temp)

	if (tz->temperature >= trip_temp) {

		throttle = true;

		trace_thermal_zone_trip(tz, trip, trip_type);

	}



	dev_dbg(&tz->device, "Trip%d[type=%d,temp=%ld]:trend=%d,throttle=%d\n",

				trip, trip_type, trip_temp, trend, throttle);