drivers/thermal/hisi_thermal.c - kernel/msm-4.19 - Gitiles

 /*
  * Hisilicon thermal sensor driver
  *
  * Copyright (c) 2014-2015 Hisilicon Limited.
  * Copyright (c) 2014-2015 Linaro Limited.
  *
  * Xinwei Kong <kong.kongxinwei@hisilicon.com>
  * Leo Yan <leo.yan@linaro.org>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  *
  * This program is distributed "as is" WITHOUT ANY WARRANTY of any
  * kind, whether express or implied; without even the implied warranty
  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  * GNU General Public License for more details.
  */

 #include <linux/cpufreq.h>
 #include <linux/delay.h>
 #include <linux/interrupt.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/io.h>

 #include "thermal_core.h"

 #define TEMP0_TH			(0x4)
 #define TEMP0_RST_TH			(0x8)
 #define TEMP0_CFG			(0xC)
 #define TEMP0_EN			(0x10)
 #define TEMP0_INT_EN			(0x14)
 #define TEMP0_INT_CLR			(0x18)
 #define TEMP0_RST_MSK			(0x1C)
 #define TEMP0_VALUE			(0x28)

 #define HISI_TEMP_BASE			(-60)
 #define HISI_TEMP_RESET			(100000)

 #define HISI_MAX_SENSORS		4

 struct hisi_thermal_sensor {
 	struct hisi_thermal_data *thermal;
 	struct thermal_zone_device *tzd;

 	long sensor_temp;
 	uint32_t id;
 	uint32_t thres_temp;
 };

 struct hisi_thermal_data {
 	struct mutex thermal_lock;    /* protects register data */
 	struct platform_device *pdev;
 	struct clk *clk;
 	struct hisi_thermal_sensor sensors[HISI_MAX_SENSORS];

 	int irq, irq_bind_sensor;
 	bool irq_enabled;

 	void __iomem *regs;
 };

 /* in millicelsius */
 static inline int _step_to_temp(int step)
 {
 	/*
 	 * Every step equals (1 * 200) / 255 celsius, and finally
 	 * need convert to millicelsius.
 	 */
 	return (HISI_TEMP_BASE * 1000 + (step * 200000 / 255));
 }

 static inline long _temp_to_step(long temp)
 {
 	return ((temp - HISI_TEMP_BASE * 1000) * 255) / 200000;
 }

 static long hisi_thermal_get_sensor_temp(struct hisi_thermal_data *data,
 					 struct hisi_thermal_sensor *sensor)
 {
 	long val;

 	mutex_lock(&data->thermal_lock);

 	/* disable interrupt */
 	writel(0x0, data->regs + TEMP0_INT_EN);
 	writel(0x1, data->regs + TEMP0_INT_CLR);

 	/* disable module firstly */
 	writel(0x0, data->regs + TEMP0_EN);

 	/* select sensor id */
 	writel((sensor->id << 12), data->regs + TEMP0_CFG);

 	/* enable module */
 	writel(0x1, data->regs + TEMP0_EN);

 	usleep_range(3000, 5000);

 	val = readl(data->regs + TEMP0_VALUE);
 	val = _step_to_temp(val);

 	mutex_unlock(&data->thermal_lock);

 	return val;
 }

 static void hisi_thermal_enable_bind_irq_sensor
 			(struct hisi_thermal_data *data)
 {
 	struct hisi_thermal_sensor *sensor;

 	mutex_lock(&data->thermal_lock);

 	sensor = &data->sensors[data->irq_bind_sensor];

 	/* setting the hdak time */
 	writel(0x0, data->regs + TEMP0_CFG);

 	/* disable module firstly */
 	writel(0x0, data->regs + TEMP0_RST_MSK);
 	writel(0x0, data->regs + TEMP0_EN);

 	/* select sensor id */
 	writel((sensor->id << 12), data->regs + TEMP0_CFG);

 	/* enable for interrupt */
 	writel(_temp_to_step(sensor->thres_temp) | 0x0FFFFFF00,
 	       data->regs + TEMP0_TH);

 	writel(_temp_to_step(HISI_TEMP_RESET), data->regs + TEMP0_RST_TH);

 	/* enable module */
 	writel(0x1, data->regs + TEMP0_RST_MSK);
 	writel(0x1, data->regs + TEMP0_EN);

 	writel(0x0, data->regs + TEMP0_INT_CLR);
 	writel(0x1, data->regs + TEMP0_INT_EN);

 	usleep_range(3000, 5000);

 	mutex_unlock(&data->thermal_lock);
 }

 static void hisi_thermal_disable_sensor(struct hisi_thermal_data *data)
 {
 	mutex_lock(&data->thermal_lock);

 	/* disable sensor module */
 	writel(0x0, data->regs + TEMP0_INT_EN);
 	writel(0x0, data->regs + TEMP0_RST_MSK);
 	writel(0x0, data->regs + TEMP0_EN);

 	mutex_unlock(&data->thermal_lock);
 }

 static int hisi_thermal_get_temp(void *_sensor, int *temp)
 {
 	struct hisi_thermal_sensor *sensor = _sensor;
 	struct hisi_thermal_data *data = sensor->thermal;

 	int sensor_id = -1, i;
 	long max_temp = 0;

 	*temp = hisi_thermal_get_sensor_temp(data, sensor);

 	sensor->sensor_temp = *temp;

 	for (i = 0; i < HISI_MAX_SENSORS; i++) {
 		if (!data->sensors[i].tzd)
 			continue;

 		if (data->sensors[i].sensor_temp >= max_temp) {
 			max_temp = data->sensors[i].sensor_temp;
 			sensor_id = i;
 		}
 	}

 	/* If no sensor has been enabled, then skip to enable irq */
 	if (sensor_id == -1)
 		return 0;

 	mutex_lock(&data->thermal_lock);
 	data->irq_bind_sensor = sensor_id;
 	mutex_unlock(&data->thermal_lock);

 	dev_dbg(&data->pdev->dev, "id=%d, irq=%d, temp=%d, thres=%d\n",
 		sensor->id, data->irq_enabled, *temp, sensor->thres_temp);
 	/*
 	 * Bind irq to sensor for two cases:
 	 *   Reenable alarm IRQ if temperature below threshold;
 	 *   if irq has been enabled, always set it;
 	 */
 	if (data->irq_enabled) {
 		hisi_thermal_enable_bind_irq_sensor(data);
 		return 0;
 	}

 	if (max_temp < sensor->thres_temp) {
 		data->irq_enabled = true;
 		hisi_thermal_enable_bind_irq_sensor(data);
 		enable_irq(data->irq);
 	}

 	return 0;
 }

 static struct thermal_zone_of_device_ops hisi_of_thermal_ops = {
 	.get_temp = hisi_thermal_get_temp,
 };

 static irqreturn_t hisi_thermal_alarm_irq(int irq, void *dev)
 {
 	struct hisi_thermal_data *data = dev;

 	disable_irq_nosync(irq);
 	data->irq_enabled = false;

 	return IRQ_WAKE_THREAD;
 }

 static irqreturn_t hisi_thermal_alarm_irq_thread(int irq, void *dev)
 {
 	struct hisi_thermal_data *data = dev;
 	struct hisi_thermal_sensor *sensor;
 	int i;

 	mutex_lock(&data->thermal_lock);
 	sensor = &data->sensors[data->irq_bind_sensor];

 	dev_crit(&data->pdev->dev, "THERMAL ALARM: T > %d\n",
 		 sensor->thres_temp / 1000);
 	mutex_unlock(&data->thermal_lock);

 	for (i = 0; i < HISI_MAX_SENSORS; i++) {
 		if (!data->sensors[i].tzd)
 			continue;

 		thermal_zone_device_update(data->sensors[i].tzd,
 					   THERMAL_EVENT_UNSPECIFIED);
 	}

 	return IRQ_HANDLED;
 }

 static int hisi_thermal_register_sensor(struct platform_device *pdev,
 					struct hisi_thermal_data *data,
 					struct hisi_thermal_sensor *sensor,
 					int index)
 {
 	int ret, i;
 	const struct thermal_trip *trip;

 	sensor->id = index;
 	sensor->thermal = data;

 	sensor->tzd = devm_thermal_zone_of_sensor_register(&pdev->dev,
 				sensor->id, sensor, &hisi_of_thermal_ops);
 	if (IS_ERR(sensor->tzd)) {
 		ret = PTR_ERR(sensor->tzd);
 		sensor->tzd = NULL;
 		dev_err(&pdev->dev, "failed to register sensor id %d: %d\n",
 			sensor->id, ret);
 		return ret;
 	}

 	trip = of_thermal_get_trip_points(sensor->tzd);

 	for (i = 0; i < of_thermal_get_ntrips(sensor->tzd); i++) {
 		if (trip[i].type == THERMAL_TRIP_PASSIVE) {
 			sensor->thres_temp = trip[i].temperature;
 			break;
 		}
 	}

 	return 0;
 }

 static const struct of_device_id of_hisi_thermal_match[] = {
 	{ .compatible = "hisilicon,tsensor" },
 	{ /* end */ }
 };
 MODULE_DEVICE_TABLE(of, of_hisi_thermal_match);

 static void hisi_thermal_toggle_sensor(struct hisi_thermal_sensor *sensor,
 				       bool on)
 {
 	struct thermal_zone_device *tzd = sensor->tzd;

 	tzd->ops->set_mode(tzd,
 		on ? THERMAL_DEVICE_ENABLED : THERMAL_DEVICE_DISABLED);
 }

 static int hisi_thermal_probe(struct platform_device *pdev)
 {
 	struct hisi_thermal_data *data;
 	struct resource *res;
 	int i;
 	int ret;

 	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
 	if (!data)
 		return -ENOMEM;

 	mutex_init(&data->thermal_lock);
 	data->pdev = pdev;

 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	data->regs = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(data->regs)) {
 		dev_err(&pdev->dev, "failed to get io address\n");
 		return PTR_ERR(data->regs);
 	}

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

 	ret = devm_request_threaded_irq(&pdev->dev, data->irq,
 					hisi_thermal_alarm_irq,
 					hisi_thermal_alarm_irq_thread,
 					0, "hisi_thermal", data);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "failed to request alarm irq: %d\n", ret);
 		return ret;
 	}

 	platform_set_drvdata(pdev, data);

 	data->clk = devm_clk_get(&pdev->dev, "thermal_clk");
 	if (IS_ERR(data->clk)) {
 		ret = PTR_ERR(data->clk);
 		if (ret != -EPROBE_DEFER)
 			dev_err(&pdev->dev,
 				"failed to get thermal clk: %d\n", ret);
 		return ret;
 	}

 	/* enable clock for thermal */
 	ret = clk_prepare_enable(data->clk);
 	if (ret) {
 		dev_err(&pdev->dev, "failed to enable thermal clk: %d\n", ret);
 		return ret;
 	}

 	hisi_thermal_enable_bind_irq_sensor(data);
 	irq_get_irqchip_state(data->irq, IRQCHIP_STATE_MASKED,
 			      &data->irq_enabled);

 	for (i = 0; i < HISI_MAX_SENSORS; ++i) {
 		ret = hisi_thermal_register_sensor(pdev, data,
 						   &data->sensors[i], i);
 		if (ret)
 			dev_err(&pdev->dev,
 				"failed to register thermal sensor: %d\n", ret);
 		else
 			hisi_thermal_toggle_sensor(&data->sensors[i], true);
 	}

 	return 0;
 }

 static int hisi_thermal_remove(struct platform_device *pdev)
 {
 	struct hisi_thermal_data *data = platform_get_drvdata(pdev);
 	int i;

 	for (i = 0; i < HISI_MAX_SENSORS; i++) {
 		struct hisi_thermal_sensor *sensor = &data->sensors[i];

 		if (!sensor->tzd)
 			continue;

 		hisi_thermal_toggle_sensor(sensor, false);
 	}

 	hisi_thermal_disable_sensor(data);
 	clk_disable_unprepare(data->clk);

 	return 0;
 }

 #ifdef CONFIG_PM_SLEEP
 static int hisi_thermal_suspend(struct device *dev)
 {
 	struct hisi_thermal_data *data = dev_get_drvdata(dev);

 	hisi_thermal_disable_sensor(data);
 	data->irq_enabled = false;

 	clk_disable_unprepare(data->clk);

 	return 0;
 }

 static int hisi_thermal_resume(struct device *dev)
 {
 	struct hisi_thermal_data *data = dev_get_drvdata(dev);
 	int ret;

 	ret = clk_prepare_enable(data->clk);
 	if (ret)
 		return ret;

 	data->irq_enabled = true;
 	hisi_thermal_enable_bind_irq_sensor(data);

 	return 0;
 }
 #endif

 static SIMPLE_DEV_PM_OPS(hisi_thermal_pm_ops,
 			 hisi_thermal_suspend, hisi_thermal_resume);

 static struct platform_driver hisi_thermal_driver = {
 	.driver = {
 		.name		= "hisi_thermal",
 		.pm		= &hisi_thermal_pm_ops,
 		.of_match_table = of_hisi_thermal_match,
 	},
 	.probe	= hisi_thermal_probe,
 	.remove	= hisi_thermal_remove,
 };

 module_platform_driver(hisi_thermal_driver);

 MODULE_AUTHOR("Xinwei Kong <kong.kongxinwei@hisilicon.com>");
 MODULE_AUTHOR("Leo Yan <leo.yan@linaro.org>");
 MODULE_DESCRIPTION("Hisilicon thermal driver");
 MODULE_LICENSE("GPL v2");
	/*
	* Hisilicon thermal sensor driver
	*
	* Copyright (c) 2014-2015 Hisilicon Limited.
	* Copyright (c) 2014-2015 Linaro Limited.
	*
	* Xinwei Kong <kong.kongxinwei@hisilicon.com>
	* Leo Yan <leo.yan@linaro.org>
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License version 2 as
	* published by the Free Software Foundation.
	*
	* This program is distributed "as is" WITHOUT ANY WARRANTY of any
	* kind, whether express or implied; without even the implied warranty
	* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*/

	#include <linux/cpufreq.h>
	#include <linux/delay.h>
	#include <linux/interrupt.h>
	#include <linux/module.h>
	#include <linux/platform_device.h>
	#include <linux/io.h>

	#include "thermal_core.h"

	#define TEMP0_TH (0x4)
	#define TEMP0_RST_TH (0x8)
	#define TEMP0_CFG (0xC)
	#define TEMP0_EN (0x10)
	#define TEMP0_INT_EN (0x14)
	#define TEMP0_INT_CLR (0x18)
	#define TEMP0_RST_MSK (0x1C)
	#define TEMP0_VALUE (0x28)

	#define HISI_TEMP_BASE (-60)
	#define HISI_TEMP_RESET (100000)

	#define HISI_MAX_SENSORS 4

	struct hisi_thermal_sensor {
	struct hisi_thermal_data *thermal;
	struct thermal_zone_device *tzd;

	long sensor_temp;
	uint32_t id;
	uint32_t thres_temp;
	};

	struct hisi_thermal_data {
	struct mutex thermal_lock; /* protects register data */
	struct platform_device *pdev;
	struct clk *clk;
	struct hisi_thermal_sensor sensors[HISI_MAX_SENSORS];

	int irq, irq_bind_sensor;
	bool irq_enabled;

	void __iomem *regs;
	};

	/* in millicelsius */
	static inline int _step_to_temp(int step)
	{
	/*
	* Every step equals (1 * 200) / 255 celsius, and finally
	* need convert to millicelsius.
	*/
	return (HISI_TEMP_BASE * 1000 + (step * 200000 / 255));
	}

	static inline long _temp_to_step(long temp)
	{
	return ((temp - HISI_TEMP_BASE * 1000) * 255) / 200000;
	}

	static long hisi_thermal_get_sensor_temp(struct hisi_thermal_data *data,
	struct hisi_thermal_sensor *sensor)
	{
	long val;

	mutex_lock(&data->thermal_lock);

	/* disable interrupt */
	writel(0x0, data->regs + TEMP0_INT_EN);
	writel(0x1, data->regs + TEMP0_INT_CLR);

	/* disable module firstly */
	writel(0x0, data->regs + TEMP0_EN);

	/* select sensor id */
	writel((sensor->id << 12), data->regs + TEMP0_CFG);

	/* enable module */
	writel(0x1, data->regs + TEMP0_EN);

	usleep_range(3000, 5000);

	val = readl(data->regs + TEMP0_VALUE);
	val = _step_to_temp(val);

	mutex_unlock(&data->thermal_lock);

	return val;
	}

	static void hisi_thermal_enable_bind_irq_sensor
	(struct hisi_thermal_data *data)
	{
	struct hisi_thermal_sensor *sensor;

	mutex_lock(&data->thermal_lock);

	sensor = &data->sensors[data->irq_bind_sensor];

	/* setting the hdak time */
	writel(0x0, data->regs + TEMP0_CFG);

	/* disable module firstly */
	writel(0x0, data->regs + TEMP0_RST_MSK);
	writel(0x0, data->regs + TEMP0_EN);

	/* select sensor id */
	writel((sensor->id << 12), data->regs + TEMP0_CFG);

	/* enable for interrupt */
	writel(_temp_to_step(sensor->thres_temp) \| 0x0FFFFFF00,
	data->regs + TEMP0_TH);

	writel(_temp_to_step(HISI_TEMP_RESET), data->regs + TEMP0_RST_TH);

	/* enable module */
	writel(0x1, data->regs + TEMP0_RST_MSK);
	writel(0x1, data->regs + TEMP0_EN);

	writel(0x0, data->regs + TEMP0_INT_CLR);
	writel(0x1, data->regs + TEMP0_INT_EN);

	usleep_range(3000, 5000);

	mutex_unlock(&data->thermal_lock);
	}

	static void hisi_thermal_disable_sensor(struct hisi_thermal_data *data)
	{
	mutex_lock(&data->thermal_lock);

	/* disable sensor module */
	writel(0x0, data->regs + TEMP0_INT_EN);
	writel(0x0, data->regs + TEMP0_RST_MSK);
	writel(0x0, data->regs + TEMP0_EN);

	mutex_unlock(&data->thermal_lock);
	}

	static int hisi_thermal_get_temp(void _sensor, int temp)
	{
	struct hisi_thermal_sensor *sensor = _sensor;
	struct hisi_thermal_data *data = sensor->thermal;

	int sensor_id = -1, i;
	long max_temp = 0;

	*temp = hisi_thermal_get_sensor_temp(data, sensor);

	sensor->sensor_temp = *temp;

	for (i = 0; i < HISI_MAX_SENSORS; i++) {
	if (!data->sensors[i].tzd)
	continue;

	if (data->sensors[i].sensor_temp >= max_temp) {
	max_temp = data->sensors[i].sensor_temp;
	sensor_id = i;
	}
	}

	/* If no sensor has been enabled, then skip to enable irq */
	if (sensor_id == -1)
	return 0;

	mutex_lock(&data->thermal_lock);
	data->irq_bind_sensor = sensor_id;
	mutex_unlock(&data->thermal_lock);

	dev_dbg(&data->pdev->dev, "id=%d, irq=%d, temp=%d, thres=%d\n",
	sensor->id, data->irq_enabled, *temp, sensor->thres_temp);
	/*
	* Bind irq to sensor for two cases:
	* Reenable alarm IRQ if temperature below threshold;
	* if irq has been enabled, always set it;
	*/
	if (data->irq_enabled) {
	hisi_thermal_enable_bind_irq_sensor(data);
	return 0;
	}

	if (max_temp < sensor->thres_temp) {
	data->irq_enabled = true;
	hisi_thermal_enable_bind_irq_sensor(data);
	enable_irq(data->irq);
	}

	return 0;
	}

	static struct thermal_zone_of_device_ops hisi_of_thermal_ops = {
	.get_temp = hisi_thermal_get_temp,
	};

	static irqreturn_t hisi_thermal_alarm_irq(int irq, void *dev)
	{
	struct hisi_thermal_data *data = dev;

	disable_irq_nosync(irq);
	data->irq_enabled = false;

	return IRQ_WAKE_THREAD;
	}

	static irqreturn_t hisi_thermal_alarm_irq_thread(int irq, void *dev)
	{
	struct hisi_thermal_data *data = dev;
	struct hisi_thermal_sensor *sensor;
	int i;

	mutex_lock(&data->thermal_lock);
	sensor = &data->sensors[data->irq_bind_sensor];

	dev_crit(&data->pdev->dev, "THERMAL ALARM: T > %d\n",
	sensor->thres_temp / 1000);
	mutex_unlock(&data->thermal_lock);

	for (i = 0; i < HISI_MAX_SENSORS; i++) {
	if (!data->sensors[i].tzd)
	continue;

	thermal_zone_device_update(data->sensors[i].tzd,
	THERMAL_EVENT_UNSPECIFIED);
	}

	return IRQ_HANDLED;
	}

	static int hisi_thermal_register_sensor(struct platform_device *pdev,
	struct hisi_thermal_data *data,
	struct hisi_thermal_sensor *sensor,
	int index)
	{
	int ret, i;
	const struct thermal_trip *trip;

	sensor->id = index;
	sensor->thermal = data;

	sensor->tzd = devm_thermal_zone_of_sensor_register(&pdev->dev,
	sensor->id, sensor, &hisi_of_thermal_ops);
	if (IS_ERR(sensor->tzd)) {
	ret = PTR_ERR(sensor->tzd);
	sensor->tzd = NULL;
	dev_err(&pdev->dev, "failed to register sensor id %d: %d\n",
	sensor->id, ret);
	return ret;
	}

	trip = of_thermal_get_trip_points(sensor->tzd);

	for (i = 0; i < of_thermal_get_ntrips(sensor->tzd); i++) {
	if (trip[i].type == THERMAL_TRIP_PASSIVE) {
	sensor->thres_temp = trip[i].temperature;
	break;
	}
	}

	return 0;
	}

	static const struct of_device_id of_hisi_thermal_match[] = {
	{ .compatible = "hisilicon,tsensor" },
	{ /* end */ }
	};
	MODULE_DEVICE_TABLE(of, of_hisi_thermal_match);

	static void hisi_thermal_toggle_sensor(struct hisi_thermal_sensor *sensor,
	bool on)
	{
	struct thermal_zone_device *tzd = sensor->tzd;

	tzd->ops->set_mode(tzd,
	on ? THERMAL_DEVICE_ENABLED : THERMAL_DEVICE_DISABLED);
	}

	static int hisi_thermal_probe(struct platform_device *pdev)
	{
	struct hisi_thermal_data *data;
	struct resource *res;
	int i;
	int ret;

	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
	if (!data)
	return -ENOMEM;

	mutex_init(&data->thermal_lock);
	data->pdev = pdev;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	data->regs = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(data->regs)) {
	dev_err(&pdev->dev, "failed to get io address\n");
	return PTR_ERR(data->regs);
	}

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

	ret = devm_request_threaded_irq(&pdev->dev, data->irq,
	hisi_thermal_alarm_irq,
	hisi_thermal_alarm_irq_thread,
	0, "hisi_thermal", data);
	if (ret < 0) {
	dev_err(&pdev->dev, "failed to request alarm irq: %d\n", ret);
	return ret;
	}

	platform_set_drvdata(pdev, data);

	data->clk = devm_clk_get(&pdev->dev, "thermal_clk");
	if (IS_ERR(data->clk)) {
	ret = PTR_ERR(data->clk);
	if (ret != -EPROBE_DEFER)
	dev_err(&pdev->dev,
	"failed to get thermal clk: %d\n", ret);
	return ret;
	}

	/* enable clock for thermal */
	ret = clk_prepare_enable(data->clk);
	if (ret) {
	dev_err(&pdev->dev, "failed to enable thermal clk: %d\n", ret);
	return ret;
	}

	hisi_thermal_enable_bind_irq_sensor(data);
	irq_get_irqchip_state(data->irq, IRQCHIP_STATE_MASKED,
	&data->irq_enabled);

	for (i = 0; i < HISI_MAX_SENSORS; ++i) {
	ret = hisi_thermal_register_sensor(pdev, data,
	&data->sensors[i], i);
	if (ret)
	dev_err(&pdev->dev,
	"failed to register thermal sensor: %d\n", ret);
	else
	hisi_thermal_toggle_sensor(&data->sensors[i], true);
	}

	return 0;
	}

	static int hisi_thermal_remove(struct platform_device *pdev)
	{
	struct hisi_thermal_data *data = platform_get_drvdata(pdev);
	int i;

	for (i = 0; i < HISI_MAX_SENSORS; i++) {
	struct hisi_thermal_sensor *sensor = &data->sensors[i];

	if (!sensor->tzd)
	continue;

	hisi_thermal_toggle_sensor(sensor, false);
	}

	hisi_thermal_disable_sensor(data);
	clk_disable_unprepare(data->clk);

	return 0;
	}

	#ifdef CONFIG_PM_SLEEP
	static int hisi_thermal_suspend(struct device *dev)
	{
	struct hisi_thermal_data *data = dev_get_drvdata(dev);

	hisi_thermal_disable_sensor(data);
	data->irq_enabled = false;

	clk_disable_unprepare(data->clk);

	return 0;
	}

	static int hisi_thermal_resume(struct device *dev)
	{
	struct hisi_thermal_data *data = dev_get_drvdata(dev);
	int ret;

	ret = clk_prepare_enable(data->clk);
	if (ret)
	return ret;

	data->irq_enabled = true;
	hisi_thermal_enable_bind_irq_sensor(data);

	return 0;
	}
	#endif

	static SIMPLE_DEV_PM_OPS(hisi_thermal_pm_ops,
	hisi_thermal_suspend, hisi_thermal_resume);

	static struct platform_driver hisi_thermal_driver = {
	.driver = {
	.name = "hisi_thermal",
	.pm = &hisi_thermal_pm_ops,
	.of_match_table = of_hisi_thermal_match,
	},
	.probe = hisi_thermal_probe,
	.remove = hisi_thermal_remove,
	};

	module_platform_driver(hisi_thermal_driver);

	MODULE_AUTHOR("Xinwei Kong <kong.kongxinwei@hisilicon.com>");
	MODULE_AUTHOR("Leo Yan <leo.yan@linaro.org>");
	MODULE_DESCRIPTION("Hisilicon thermal driver");
	MODULE_LICENSE("GPL v2");