[deliverable/linux.git] / drivers / thermal / hisi_thermal.c

/*
 * 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);
	}

	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);

	clk_prepare_enable(data->clk);

	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");
Commit	Line	Data
9a5238a9	1	/*
	2	* Hisilicon thermal sensor driver
	3	*
	4	* Copyright (c) 2014-2015 Hisilicon Limited.
	5	* Copyright (c) 2014-2015 Linaro Limited.
	6	*
	7	* Xinwei Kong <kong.kongxinwei@hisilicon.com>
	8	* Leo Yan <leo.yan@linaro.org>
	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License version 2 as
	12	* published by the Free Software Foundation.
	13	*
	14	* This program is distributed "as is" WITHOUT ANY WARRANTY of any
	15	* kind, whether express or implied; without even the implied warranty
	16	* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	* GNU General Public License for more details.
	18	*/
	19
	20	#include <linux/cpufreq.h>
	21	#include <linux/delay.h>
	22	#include <linux/interrupt.h>
	23	#include <linux/module.h>
	24	#include <linux/platform_device.h>
	25	#include <linux/io.h>
	26
	27	#include "thermal_core.h"
	28
	29	#define TEMP0_TH (0x4)
	30	#define TEMP0_RST_TH (0x8)
	31	#define TEMP0_CFG (0xC)
	32	#define TEMP0_EN (0x10)
	33	#define TEMP0_INT_EN (0x14)
	34	#define TEMP0_INT_CLR (0x18)
	35	#define TEMP0_RST_MSK (0x1C)
	36	#define TEMP0_VALUE (0x28)
	37
	38	#define HISI_TEMP_BASE (-60)
	39	#define HISI_TEMP_RESET (100000)
	40
	41	#define HISI_MAX_SENSORS 4
	42
	43	struct hisi_thermal_sensor {
	44	struct hisi_thermal_data *thermal;
	45	struct thermal_zone_device *tzd;
	46
	47	long sensor_temp;
	48	uint32_t id;
	49	uint32_t thres_temp;
	50	};
	51
	52	struct hisi_thermal_data {
	53	struct mutex thermal_lock; /* protects register data */
	54	struct platform_device *pdev;
	55	struct clk *clk;
	56	struct hisi_thermal_sensor sensors[HISI_MAX_SENSORS];
	57
	58	int irq, irq_bind_sensor;
	59	bool irq_enabled;
	60
	61	void __iomem *regs;
	62	};
	63
	64	/* in millicelsius */
65	static inline int _step_to_temp(int step)
66	{
67	/*
68	* Every step equals (1 * 200) / 255 celsius, and finally
69	* need convert to millicelsius.
70	*/
5fdfc48b	71	return (HISI_TEMP_BASE * 1000 + (step * 200000 / 255));
9a5238a9	72	}
	73
	74	static inline long _temp_to_step(long temp)
	75	{
5fdfc48b	76	return ((temp - HISI_TEMP_BASE * 1000) * 255) / 200000;
9a5238a9	77	}
	78
	79	static long hisi_thermal_get_sensor_temp(struct hisi_thermal_data *data,
	80	struct hisi_thermal_sensor *sensor)
	81	{
	82	long val;
	83
	84	mutex_lock(&data->thermal_lock);
	85
	86	/* disable interrupt */
	87	writel(0x0, data->regs + TEMP0_INT_EN);
	88	writel(0x1, data->regs + TEMP0_INT_CLR);
	89
	90	/* disable module firstly */
	91	writel(0x0, data->regs + TEMP0_EN);
	92
	93	/* select sensor id */
	94	writel((sensor->id << 12), data->regs + TEMP0_CFG);
	95
	96	/* enable module */
	97	writel(0x1, data->regs + TEMP0_EN);
	98
	99	usleep_range(3000, 5000);
	100
	101	val = readl(data->regs + TEMP0_VALUE);
	102	val = _step_to_temp(val);
	103
	104	mutex_unlock(&data->thermal_lock);
	105
	106	return val;
	107	}
	108
	109	static void hisi_thermal_enable_bind_irq_sensor
	110	(struct hisi_thermal_data *data)
	111	{
	112	struct hisi_thermal_sensor *sensor;
	113
	114	mutex_lock(&data->thermal_lock);
	115
	116	sensor = &data->sensors[data->irq_bind_sensor];
	117
	118	/* setting the hdak time */
	119	writel(0x0, data->regs + TEMP0_CFG);
	120
	121	/* disable module firstly */
	122	writel(0x0, data->regs + TEMP0_RST_MSK);
	123	writel(0x0, data->regs + TEMP0_EN);
	124
	125	/* select sensor id */
	126	writel((sensor->id << 12), data->regs + TEMP0_CFG);
	127
	128	/* enable for interrupt */
	129	writel(_temp_to_step(sensor->thres_temp) \| 0x0FFFFFF00,
	130	data->regs + TEMP0_TH);
	131
	132	writel(_temp_to_step(HISI_TEMP_RESET), data->regs + TEMP0_RST_TH);
	133
	134	/* enable module */
	135	writel(0x1, data->regs + TEMP0_RST_MSK);
	136	writel(0x1, data->regs + TEMP0_EN);
	137
	138	writel(0x0, data->regs + TEMP0_INT_CLR);
	139	writel(0x1, data->regs + TEMP0_INT_EN);
	140
141	usleep_range(3000, 5000);
142
143	mutex_unlock(&data->thermal_lock);
144	}
145
146	static void hisi_thermal_disable_sensor(struct hisi_thermal_data *data)
147	{
148	mutex_lock(&data->thermal_lock);
149
150	/* disable sensor module */
151	writel(0x0, data->regs + TEMP0_INT_EN);
152	writel(0x0, data->regs + TEMP0_RST_MSK);
153	writel(0x0, data->regs + TEMP0_EN);
154
155	mutex_unlock(&data->thermal_lock);
156	}
157
17e8351a	158	static int hisi_thermal_get_temp(void _sensor, int temp)
9a5238a9	159	{
	160	struct hisi_thermal_sensor *sensor = _sensor;
	161	struct hisi_thermal_data *data = sensor->thermal;
	162
439dc968	163	int sensor_id = -1, i;
9a5238a9	164	long max_temp = 0;
	165
	166	*temp = hisi_thermal_get_sensor_temp(data, sensor);
	167
	168	sensor->sensor_temp = *temp;
	169
	170	for (i = 0; i < HISI_MAX_SENSORS; i++) {
439dc968 LY	171	if (!data->sensors[i].tzd)
	172	continue;
	173
9a5238a9	174	if (data->sensors[i].sensor_temp >= max_temp) {
	175	max_temp = data->sensors[i].sensor_temp;
	176	sensor_id = i;
	177	}
	178	}
	179
439dc968 LY	180	/* If no sensor has been enabled, then skip to enable irq */
	181	if (sensor_id == -1)
	182	return 0;
	183
9a5238a9	184	mutex_lock(&data->thermal_lock);
	185	data->irq_bind_sensor = sensor_id;
	186	mutex_unlock(&data->thermal_lock);
	187
17e8351a	188	dev_dbg(&data->pdev->dev, "id=%d, irq=%d, temp=%d, thres=%d\n",
9a5238a9	189	sensor->id, data->irq_enabled, *temp, sensor->thres_temp);
	190	/*
	191	* Bind irq to sensor for two cases:
	192	* Reenable alarm IRQ if temperature below threshold;
	193	* if irq has been enabled, always set it;
	194	*/
	195	if (data->irq_enabled) {
	196	hisi_thermal_enable_bind_irq_sensor(data);
	197	return 0;
	198	}
	199
	200	if (max_temp < sensor->thres_temp) {
	201	data->irq_enabled = true;
	202	hisi_thermal_enable_bind_irq_sensor(data);
	203	enable_irq(data->irq);
	204	}
	205
	206	return 0;
	207	}
	208
	209	static struct thermal_zone_of_device_ops hisi_of_thermal_ops = {
	210	.get_temp = hisi_thermal_get_temp,
	211	};
	212
	213	static irqreturn_t hisi_thermal_alarm_irq(int irq, void *dev)
	214	{
	215	struct hisi_thermal_data *data = dev;
	216
	217	disable_irq_nosync(irq);
	218	data->irq_enabled = false;
	219
	220	return IRQ_WAKE_THREAD;
	221	}
	222
	223	static irqreturn_t hisi_thermal_alarm_irq_thread(int irq, void *dev)
	224	{
	225	struct hisi_thermal_data *data = dev;
	226	struct hisi_thermal_sensor *sensor;
	227	int i;
	228
	229	mutex_lock(&data->thermal_lock);
	230	sensor = &data->sensors[data->irq_bind_sensor];
	231
	232	dev_crit(&data->pdev->dev, "THERMAL ALARM: T > %d\n",
	233	sensor->thres_temp / 1000);
	234	mutex_unlock(&data->thermal_lock);
	235
439dc968 LY	236	for (i = 0; i < HISI_MAX_SENSORS; i++) {
	237	if (!data->sensors[i].tzd)
	238	continue;
	239
9a5238a9	240	thermal_zone_device_update(data->sensors[i].tzd);
439dc968	241	}
9a5238a9	242
	243	return IRQ_HANDLED;
	244	}
	245
	246	static int hisi_thermal_register_sensor(struct platform_device *pdev,
	247	struct hisi_thermal_data *data,
	248	struct hisi_thermal_sensor *sensor,
	249	int index)
	250	{
	251	int ret, i;
	252	const struct thermal_trip *trip;
	253
	254	sensor->id = index;
	255	sensor->thermal = data;
	256
44a520d8 EV	257	sensor->tzd = devm_thermal_zone_of_sensor_register(&pdev->dev,
44a520d8 EV	258	sensor->id, sensor, &hisi_of_thermal_ops);
9a5238a9	259	if (IS_ERR(sensor->tzd)) {
9a5238a9	260	ret = PTR_ERR(sensor->tzd);
439dc968	261	sensor->tzd = NULL;
9a5238a9	262	dev_err(&pdev->dev, "failed to register sensor id %d: %d\n",
	263	sensor->id, ret);
	264	return ret;
	265	}
	266
	267	trip = of_thermal_get_trip_points(sensor->tzd);
	268
	269	for (i = 0; i < of_thermal_get_ntrips(sensor->tzd); i++) {
	270	if (trip[i].type == THERMAL_TRIP_PASSIVE) {
	271	sensor->thres_temp = trip[i].temperature;
	272	break;
	273	}
	274	}
	275
	276	return 0;
	277	}
	278
	279	static const struct of_device_id of_hisi_thermal_match[] = {
	280	{ .compatible = "hisilicon,tsensor" },
	281	{ /* end */ }
	282	};
	283	MODULE_DEVICE_TABLE(of, of_hisi_thermal_match);
	284
	285	static void hisi_thermal_toggle_sensor(struct hisi_thermal_sensor *sensor,
	286	bool on)
	287	{
	288	struct thermal_zone_device *tzd = sensor->tzd;
	289
	290	tzd->ops->set_mode(tzd,
	291	on ? THERMAL_DEVICE_ENABLED : THERMAL_DEVICE_DISABLED);
	292	}
	293
	294	static int hisi_thermal_probe(struct platform_device *pdev)
	295	{
	296	struct hisi_thermal_data *data;
	297	struct resource *res;
	298	int i;
	299	int ret;
	300
	301	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
	302	if (!data)
	303	return -ENOMEM;
	304
	305	mutex_init(&data->thermal_lock);
	306	data->pdev = pdev;
	307
	308	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	309	data->regs = devm_ioremap_resource(&pdev->dev, res);
	310	if (IS_ERR(data->regs)) {
	311	dev_err(&pdev->dev, "failed to get io address\n");
	312	return PTR_ERR(data->regs);
	313	}
	314
	315	data->irq = platform_get_irq(pdev, 0);
	316	if (data->irq < 0)
	317	return data->irq;
	318
	319	ret = devm_request_threaded_irq(&pdev->dev, data->irq,
	320	hisi_thermal_alarm_irq,
	321	hisi_thermal_alarm_irq_thread,
	322	0, "hisi_thermal", data);
	323	if (ret < 0) {
	324	dev_err(&pdev->dev, "failed to request alarm irq: %d\n", ret);
	325	return ret;
326	}
327
328	platform_set_drvdata(pdev, data);
329
330	data->clk = devm_clk_get(&pdev->dev, "thermal_clk");
331	if (IS_ERR(data->clk)) {
332	ret = PTR_ERR(data->clk);
333	if (ret != -EPROBE_DEFER)
334	dev_err(&pdev->dev,
335	"failed to get thermal clk: %d\n", ret);
336	return ret;
337	}
338
339	/* enable clock for thermal */
340	ret = clk_prepare_enable(data->clk);
341	if (ret) {
342	dev_err(&pdev->dev, "failed to enable thermal clk: %d\n", ret);
343	return ret;
344	}
345
469ace07 LY	346	hisi_thermal_enable_bind_irq_sensor(data);
	347	irq_get_irqchip_state(data->irq, IRQCHIP_STATE_MASKED,
	348	&data->irq_enabled);
	349
9a5238a9	350	for (i = 0; i < HISI_MAX_SENSORS; ++i) {
	351	ret = hisi_thermal_register_sensor(pdev, data,
	352	&data->sensors[i], i);
439dc968	353	if (ret)
9a5238a9	354	dev_err(&pdev->dev,
9a5238a9	355	"failed to register thermal sensor: %d\n", ret);
439dc968 LY	356	else
439dc968 LY	357	hisi_thermal_toggle_sensor(&data->sensors[i], true);
9a5238a9	358	}
9a5238a9	359
9a5238a9	360	return 0;
9a5238a9	361	}
	362
	363	static int hisi_thermal_remove(struct platform_device *pdev)
	364	{
	365	struct hisi_thermal_data *data = platform_get_drvdata(pdev);
	366	int i;
	367
	368	for (i = 0; i < HISI_MAX_SENSORS; i++) {
	369	struct hisi_thermal_sensor *sensor = &data->sensors[i];
	370
439dc968 LY	371	if (!sensor->tzd)
	372	continue;
	373
9a5238a9	374	hisi_thermal_toggle_sensor(sensor, false);
9a5238a9	375	}
	376
	377	hisi_thermal_disable_sensor(data);
	378	clk_disable_unprepare(data->clk);
	379
	380	return 0;
	381	}
	382
	383	#ifdef CONFIG_PM_SLEEP
	384	static int hisi_thermal_suspend(struct device *dev)
	385	{
	386	struct hisi_thermal_data *data = dev_get_drvdata(dev);
	387
	388	hisi_thermal_disable_sensor(data);
	389	data->irq_enabled = false;
	390
	391	clk_disable_unprepare(data->clk);
	392
	393	return 0;
	394	}
	395
	396	static int hisi_thermal_resume(struct device *dev)
	397	{
	398	struct hisi_thermal_data *data = dev_get_drvdata(dev);
	399
	400	clk_prepare_enable(data->clk);
	401
	402	data->irq_enabled = true;
	403	hisi_thermal_enable_bind_irq_sensor(data);
	404
	405	return 0;
	406	}
	407	#endif
	408
	409	static SIMPLE_DEV_PM_OPS(hisi_thermal_pm_ops,
	410	hisi_thermal_suspend, hisi_thermal_resume);
	411
	412	static struct platform_driver hisi_thermal_driver = {
	413	.driver = {
	414	.name = "hisi_thermal",
9a5238a9	415	.pm = &hisi_thermal_pm_ops,
	416	.of_match_table = of_hisi_thermal_match,
	417	},
	418	.probe = hisi_thermal_probe,
	419	.remove = hisi_thermal_remove,
	420	};
	421
	422	module_platform_driver(hisi_thermal_driver);
	423
	424	MODULE_AUTHOR("Xinwei Kong <kong.kongxinwei@hisilicon.com>");
	425	MODULE_AUTHOR("Leo Yan <leo.yan@linaro.org>");
	426	MODULE_DESCRIPTION("Hisilicon thermal driver");
	427	MODULE_LICENSE("GPL v2");