[mirror_ubuntu-zesty-kernel.git] / drivers / thermal / rockchip_thermal.c

/*
 * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope 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.
 */

#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/platform_device.h>
#include <linux/reset.h>
#include <linux/thermal.h>

/**
 * If the temperature over a period of time High,
 * the resulting TSHUT gave CRU module,let it reset the entire chip,
 * or via GPIO give PMIC.
 */
enum tshut_mode {
	TSHUT_MODE_CRU = 0,
	TSHUT_MODE_GPIO,
};

/**
 * the system Temperature Sensors tshut(tshut) polarity
 * the bit 8 is tshut polarity.
 * 0: low active, 1: high active
 */
enum tshut_polarity {
	TSHUT_LOW_ACTIVE = 0,
	TSHUT_HIGH_ACTIVE,
};

/**
 * The system has three Temperature Sensors.  channel 0 is reserved,
 * channel 1 is for CPU, and channel 2 is for GPU.
 */
enum sensor_id {
	SENSOR_CPU = 1,
	SENSOR_GPU,
};

struct rockchip_tsadc_chip {
	/* The hardware-controlled tshut property */
	long tshut_temp;
	enum tshut_mode tshut_mode;
	enum tshut_polarity tshut_polarity;

	/* Chip-wide methods */
	void (*initialize)(void __iomem *reg, enum tshut_polarity p);
	void (*irq_ack)(void __iomem *reg);
	void (*control)(void __iomem *reg, bool on);

	/* Per-sensor methods */
	int (*get_temp)(int chn, void __iomem *reg, long *temp);
	void (*set_tshut_temp)(int chn, void __iomem *reg, long temp);
	void (*set_tshut_mode)(int chn, void __iomem *reg, enum tshut_mode m);
};

struct rockchip_thermal_sensor {
	struct rockchip_thermal_data *thermal;
	struct thermal_zone_device *tzd;
	enum sensor_id id;
};

#define NUM_SENSORS	2 /* Ignore unused sensor 0 */

struct rockchip_thermal_data {
	const struct rockchip_tsadc_chip *chip;
	struct platform_device *pdev;
	struct reset_control *reset;

	struct rockchip_thermal_sensor sensors[NUM_SENSORS];

	struct clk *clk;
	struct clk *pclk;

	void __iomem *regs;

	long tshut_temp;
	enum tshut_mode tshut_mode;
	enum tshut_polarity tshut_polarity;
};

/* TSADC V2 Sensor info define: */
#define TSADCV2_AUTO_CON			0x04
#define TSADCV2_INT_EN				0x08
#define TSADCV2_INT_PD				0x0c
#define TSADCV2_DATA(chn)			(0x20 + (chn) * 0x04)
#define TSADCV2_COMP_SHUT(chn)		        (0x40 + (chn) * 0x04)
#define TSADCV2_HIGHT_INT_DEBOUNCE		0x60
#define TSADCV2_HIGHT_TSHUT_DEBOUNCE		0x64
#define TSADCV2_AUTO_PERIOD			0x68
#define TSADCV2_AUTO_PERIOD_HT			0x6c

#define TSADCV2_AUTO_EN				BIT(0)
#define TSADCV2_AUTO_DISABLE			~BIT(0)
#define TSADCV2_AUTO_SRC_EN(chn)		BIT(4 + (chn))
#define TSADCV2_AUTO_TSHUT_POLARITY_HIGH	BIT(8)
#define TSADCV2_AUTO_TSHUT_POLARITY_LOW		~BIT(8)

#define TSADCV2_INT_SRC_EN(chn)			BIT(chn)
#define TSADCV2_SHUT_2GPIO_SRC_EN(chn)		BIT(4 + (chn))
#define TSADCV2_SHUT_2CRU_SRC_EN(chn)		BIT(8 + (chn))

#define TSADCV2_INT_PD_CLEAR			~BIT(8)

#define TSADCV2_DATA_MASK			0xfff
#define TSADCV2_HIGHT_INT_DEBOUNCE_COUNT	4
#define TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT	4
#define TSADCV2_AUTO_PERIOD_TIME		250 /* msec */
#define TSADCV2_AUTO_PERIOD_HT_TIME		50  /* msec */

struct tsadc_table {
	unsigned long code;
	long temp;
};

static const struct tsadc_table v2_code_table[] = {
	{TSADCV2_DATA_MASK, -40000},
	{3800, -40000},
	{3792, -35000},
	{3783, -30000},
	{3774, -25000},
	{3765, -20000},
	{3756, -15000},
	{3747, -10000},
	{3737, -5000},
	{3728, 0},
	{3718, 5000},
	{3708, 10000},
	{3698, 15000},
	{3688, 20000},
	{3678, 25000},
	{3667, 30000},
	{3656, 35000},
	{3645, 40000},
	{3634, 45000},
	{3623, 50000},
	{3611, 55000},
	{3600, 60000},
	{3588, 65000},
	{3575, 70000},
	{3563, 75000},
	{3550, 80000},
	{3537, 85000},
	{3524, 90000},
	{3510, 95000},
	{3496, 100000},
	{3482, 105000},
	{3467, 110000},
	{3452, 115000},
	{3437, 120000},
	{3421, 125000},
	{0, 125000},
};

static u32 rk_tsadcv2_temp_to_code(long temp)
{
	int high, low, mid;

	low = 0;
	high = ARRAY_SIZE(v2_code_table) - 1;
	mid = (high + low) / 2;

	if (temp < v2_code_table[low].temp || temp > v2_code_table[high].temp)
		return 0;

	while (low <= high) {
		if (temp == v2_code_table[mid].temp)
			return v2_code_table[mid].code;
		else if (temp < v2_code_table[mid].temp)
			high = mid - 1;
		else
			low = mid + 1;
		mid = (low + high) / 2;
	}

	return 0;
}

static long rk_tsadcv2_code_to_temp(u32 code)
{
	int high, low, mid;

	low = 0;
	high = ARRAY_SIZE(v2_code_table) - 1;
	mid = (high + low) / 2;

	if (code > v2_code_table[low].code || code < v2_code_table[high].code)
		return 125000; /* No code available, return max temperature */

	while (low <= high) {
		if (code >= v2_code_table[mid].code && code <
		    v2_code_table[mid - 1].code)
			return v2_code_table[mid].temp;
		else if (code < v2_code_table[mid].code)
			low = mid + 1;
		else
			high = mid - 1;
		mid = (low + high) / 2;
	}

	return 125000;
}

/**
 * rk_tsadcv2_initialize - initialize TASDC Controller
 * (1) Set TSADCV2_AUTO_PERIOD, configure the interleave between
 * every two accessing of TSADC in normal operation.
 * (2) Set TSADCV2_AUTO_PERIOD_HT, configure the interleave between
 * every two accessing of TSADC after the temperature is higher
 * than COM_SHUT or COM_INT.
 * (3) Set TSADCV2_HIGH_INT_DEBOUNCE and TSADC_HIGHT_TSHUT_DEBOUNCE,
 * if the temperature is higher than COMP_INT or COMP_SHUT for
 * "debounce" times, TSADC controller will generate interrupt or TSHUT.
 */
static void rk_tsadcv2_initialize(void __iomem *regs,
				  enum tshut_polarity tshut_polarity)
{
	if (tshut_polarity == TSHUT_HIGH_ACTIVE)
		writel_relaxed(0 | (TSADCV2_AUTO_TSHUT_POLARITY_HIGH),
			       regs + TSADCV2_AUTO_CON);
	else
		writel_relaxed(0 | (TSADCV2_AUTO_TSHUT_POLARITY_LOW),
			       regs + TSADCV2_AUTO_CON);

	writel_relaxed(TSADCV2_AUTO_PERIOD_TIME, regs + TSADCV2_AUTO_PERIOD);
	writel_relaxed(TSADCV2_HIGHT_INT_DEBOUNCE_COUNT,
		       regs + TSADCV2_HIGHT_INT_DEBOUNCE);
	writel_relaxed(TSADCV2_AUTO_PERIOD_HT_TIME,
		       regs + TSADCV2_AUTO_PERIOD_HT);
	writel_relaxed(TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT,
		       regs + TSADCV2_HIGHT_TSHUT_DEBOUNCE);
}

static void rk_tsadcv2_irq_ack(void __iomem *regs)
{
	u32 val;

	val = readl_relaxed(regs + TSADCV2_INT_PD);
	writel_relaxed(val & TSADCV2_INT_PD_CLEAR, regs + TSADCV2_INT_PD);
}

static void rk_tsadcv2_control(void __iomem *regs, bool enable)
{
	u32 val;

	val = readl_relaxed(regs + TSADCV2_AUTO_CON);
	if (enable)
		val |= TSADCV2_AUTO_EN;
	else
		val &= ~TSADCV2_AUTO_EN;

	writel_relaxed(val, regs + TSADCV2_AUTO_CON);
}

static int rk_tsadcv2_get_temp(int chn, void __iomem *regs, long *temp)
{
	u32 val;

	/* the A/D value of the channel last conversion need some time */
	val = readl_relaxed(regs + TSADCV2_DATA(chn));
	if (val == 0)
		return -EAGAIN;

	*temp = rk_tsadcv2_code_to_temp(val);

	return 0;
}

static void rk_tsadcv2_tshut_temp(int chn, void __iomem *regs, long temp)
{
	u32 tshut_value, val;

	tshut_value = rk_tsadcv2_temp_to_code(temp);
	writel_relaxed(tshut_value, regs + TSADCV2_COMP_SHUT(chn));

	/* TSHUT will be valid */
	val = readl_relaxed(regs + TSADCV2_AUTO_CON);
	writel_relaxed(val | TSADCV2_AUTO_SRC_EN(chn), regs + TSADCV2_AUTO_CON);
}

static void rk_tsadcv2_tshut_mode(int chn, void __iomem *regs,
				  enum tshut_mode mode)
{
	u32 val;

	val = readl_relaxed(regs + TSADCV2_INT_EN);
	if (mode == TSHUT_MODE_GPIO) {
		val &= ~TSADCV2_SHUT_2CRU_SRC_EN(chn);
		val |= TSADCV2_SHUT_2GPIO_SRC_EN(chn);
	} else {
		val &= ~TSADCV2_SHUT_2GPIO_SRC_EN(chn);
		val |= TSADCV2_SHUT_2CRU_SRC_EN(chn);
	}

	writel_relaxed(val, regs + TSADCV2_INT_EN);
}

static const struct rockchip_tsadc_chip rk3288_tsadc_data = {
	.tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */
	.tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */
	.tshut_temp = 95000,

	.initialize = rk_tsadcv2_initialize,
	.irq_ack = rk_tsadcv2_irq_ack,
	.control = rk_tsadcv2_control,
	.get_temp = rk_tsadcv2_get_temp,
	.set_tshut_temp = rk_tsadcv2_tshut_temp,
	.set_tshut_mode = rk_tsadcv2_tshut_mode,
};

static const struct of_device_id of_rockchip_thermal_match[] = {
	{
		.compatible = "rockchip,rk3288-tsadc",
		.data = (void *)&rk3288_tsadc_data,
	},
	{ /* end */ },
};
MODULE_DEVICE_TABLE(of, of_rockchip_thermal_match);

static void
rockchip_thermal_toggle_sensor(struct rockchip_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 irqreturn_t rockchip_thermal_alarm_irq_thread(int irq, void *dev)
{
	struct rockchip_thermal_data *thermal = dev;
	int i;

	dev_dbg(&thermal->pdev->dev, "thermal alarm\n");

	thermal->chip->irq_ack(thermal->regs);

	for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++)
		thermal_zone_device_update(thermal->sensors[i].tzd);

	return IRQ_HANDLED;
}

static int rockchip_thermal_get_temp(void *_sensor, long *out_temp)
{
	struct rockchip_thermal_sensor *sensor = _sensor;
	struct rockchip_thermal_data *thermal = sensor->thermal;
	const struct rockchip_tsadc_chip *tsadc = sensor->thermal->chip;
	int retval;

	retval = tsadc->get_temp(sensor->id, thermal->regs, out_temp);
	dev_dbg(&thermal->pdev->dev, "sensor %d - temp: %ld, retval: %d\n",
		sensor->id, *out_temp, retval);

	return retval;
}

static const struct thermal_zone_of_device_ops rockchip_of_thermal_ops = {
	.get_temp = rockchip_thermal_get_temp,
};

static int rockchip_configure_from_dt(struct device *dev,
				      struct device_node *np,
				      struct rockchip_thermal_data *thermal)
{
	u32 shut_temp, tshut_mode, tshut_polarity;

	if (of_property_read_u32(np, "rockchip,hw-tshut-temp", &shut_temp)) {
		dev_warn(dev,
			 "Missing tshut temp property, using default %ld\n",
			 thermal->chip->tshut_temp);
		thermal->tshut_temp = thermal->chip->tshut_temp;
	} else {
		thermal->tshut_temp = shut_temp;
	}

	if (thermal->tshut_temp > INT_MAX) {
		dev_err(dev, "Invalid tshut temperature specified: %ld\n",
			thermal->tshut_temp);
		return -ERANGE;
	}

	if (of_property_read_u32(np, "rockchip,hw-tshut-mode", &tshut_mode)) {
		dev_warn(dev,
			 "Missing tshut mode property, using default (%s)\n",
			 thermal->chip->tshut_mode == TSHUT_MODE_GPIO ?
				"gpio" : "cru");
		thermal->tshut_mode = thermal->chip->tshut_mode;
	} else {
		thermal->tshut_mode = tshut_mode;
	}

	if (thermal->tshut_mode > 1) {
		dev_err(dev, "Invalid tshut mode specified: %d\n",
			thermal->tshut_mode);
		return -EINVAL;
	}

	if (of_property_read_u32(np, "rockchip,hw-tshut-polarity",
				 &tshut_polarity)) {
		dev_warn(dev,
			 "Missing tshut-polarity property, using default (%s)\n",
			 thermal->chip->tshut_polarity == TSHUT_LOW_ACTIVE ?
				"low" : "high");
		thermal->tshut_polarity = thermal->chip->tshut_polarity;
	} else {
		thermal->tshut_polarity = tshut_polarity;
	}

	if (thermal->tshut_polarity > 1) {
		dev_err(dev, "Invalid tshut-polarity specified: %d\n",
			thermal->tshut_polarity);
		return -EINVAL;
	}

	return 0;
}

static int
rockchip_thermal_register_sensor(struct platform_device *pdev,
				 struct rockchip_thermal_data *thermal,
				 struct rockchip_thermal_sensor *sensor,
				 enum sensor_id id)
{
	const struct rockchip_tsadc_chip *tsadc = thermal->chip;
	int error;

	tsadc->set_tshut_mode(id, thermal->regs, thermal->tshut_mode);
	tsadc->set_tshut_temp(id, thermal->regs, thermal->tshut_temp);

	sensor->thermal = thermal;
	sensor->id = id;
	sensor->tzd = thermal_zone_of_sensor_register(&pdev->dev, id, sensor,
						      &rockchip_of_thermal_ops);
	if (IS_ERR(sensor->tzd)) {
		error = PTR_ERR(sensor->tzd);
		dev_err(&pdev->dev, "failed to register sensor %d: %d\n",
			id, error);
		return error;
	}

	return 0;
}

/*
 * Reset TSADC Controller, reset all tsadc registers.
 */
static void rockchip_thermal_reset_controller(struct reset_control *reset)
{
	reset_control_assert(reset);
	usleep_range(10, 20);
	reset_control_deassert(reset);
}

static int rockchip_thermal_probe(struct platform_device *pdev)
{
	struct device_node *np = pdev->dev.of_node;
	struct rockchip_thermal_data *thermal;
	const struct of_device_id *match;
	struct resource *res;
	int irq;
	int i;
	int error;

	match = of_match_node(of_rockchip_thermal_match, np);
	if (!match)
		return -ENXIO;

	irq = platform_get_irq(pdev, 0);
	if (irq < 0) {
		dev_err(&pdev->dev, "no irq resource?\n");
		return -EINVAL;
	}

	thermal = devm_kzalloc(&pdev->dev, sizeof(struct rockchip_thermal_data),
			       GFP_KERNEL);
	if (!thermal)
		return -ENOMEM;

	thermal->pdev = pdev;

	thermal->chip = (const struct rockchip_tsadc_chip *)match->data;
	if (!thermal->chip)
		return -EINVAL;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	thermal->regs = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(thermal->regs))
		return PTR_ERR(thermal->regs);

	thermal->reset = devm_reset_control_get(&pdev->dev, "tsadc-apb");
	if (IS_ERR(thermal->reset)) {
		error = PTR_ERR(thermal->reset);
		dev_err(&pdev->dev, "failed to get tsadc reset: %d\n", error);
		return error;
	}

	thermal->clk = devm_clk_get(&pdev->dev, "tsadc");
	if (IS_ERR(thermal->clk)) {
		error = PTR_ERR(thermal->clk);
		dev_err(&pdev->dev, "failed to get tsadc clock: %d\n", error);
		return error;
	}

	thermal->pclk = devm_clk_get(&pdev->dev, "apb_pclk");
	if (IS_ERR(thermal->pclk)) {
		error = PTR_ERR(thermal->clk);
		dev_err(&pdev->dev, "failed to get apb_pclk clock: %d\n",
			error);
		return error;
	}

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

	error = clk_prepare_enable(thermal->pclk);
	if (error) {
		dev_err(&pdev->dev, "failed to enable pclk: %d\n", error);
		goto err_disable_clk;
	}

	rockchip_thermal_reset_controller(thermal->reset);

	error = rockchip_configure_from_dt(&pdev->dev, np, thermal);
	if (error) {
		dev_err(&pdev->dev, "failed to parse device tree data: %d\n",
			error);
		goto err_disable_pclk;
	}

	thermal->chip->initialize(thermal->regs, thermal->tshut_polarity);

	error = rockchip_thermal_register_sensor(pdev, thermal,
						 &thermal->sensors[0],
						 SENSOR_CPU);
	if (error) {
		dev_err(&pdev->dev,
			"failed to register CPU thermal sensor: %d\n", error);
		goto err_disable_pclk;
	}

	error = rockchip_thermal_register_sensor(pdev, thermal,
						 &thermal->sensors[1],
						 SENSOR_GPU);
	if (error) {
		dev_err(&pdev->dev,
			"failed to register GPU thermal sensor: %d\n", error);
		goto err_unregister_cpu_sensor;
	}

	error = devm_request_threaded_irq(&pdev->dev, irq, NULL,
					  &rockchip_thermal_alarm_irq_thread,
					  IRQF_ONESHOT,
					  "rockchip_thermal", thermal);
	if (error) {
		dev_err(&pdev->dev,
			"failed to request tsadc irq: %d\n", error);
		goto err_unregister_gpu_sensor;
	}

	thermal->chip->control(thermal->regs, true);

	for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++)
		rockchip_thermal_toggle_sensor(&thermal->sensors[i], true);

	platform_set_drvdata(pdev, thermal);

	return 0;

err_unregister_gpu_sensor:
	thermal_zone_of_sensor_unregister(&pdev->dev, thermal->sensors[1].tzd);
err_unregister_cpu_sensor:
	thermal_zone_of_sensor_unregister(&pdev->dev, thermal->sensors[0].tzd);
err_disable_pclk:
	clk_disable_unprepare(thermal->pclk);
err_disable_clk:
	clk_disable_unprepare(thermal->clk);

	return error;
}

static int rockchip_thermal_remove(struct platform_device *pdev)
{
	struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev);
	int i;

	for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) {
		struct rockchip_thermal_sensor *sensor = &thermal->sensors[i];

		rockchip_thermal_toggle_sensor(sensor, false);
		thermal_zone_of_sensor_unregister(&pdev->dev, sensor->tzd);
	}

	thermal->chip->control(thermal->regs, false);

	clk_disable_unprepare(thermal->pclk);
	clk_disable_unprepare(thermal->clk);

	return 0;
}

static int __maybe_unused rockchip_thermal_suspend(struct device *dev)
{
	struct platform_device *pdev = to_platform_device(dev);
	struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev);
	int i;

	for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++)
		rockchip_thermal_toggle_sensor(&thermal->sensors[i], false);

	thermal->chip->control(thermal->regs, false);

	clk_disable(thermal->pclk);
	clk_disable(thermal->clk);

	return 0;
}

static int __maybe_unused rockchip_thermal_resume(struct device *dev)
{
	struct platform_device *pdev = to_platform_device(dev);
	struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev);
	int i;
	int error;

	error = clk_enable(thermal->clk);
	if (error)
		return error;

	error = clk_enable(thermal->pclk);
	if (error)
		return error;

	rockchip_thermal_reset_controller(thermal->reset);

	thermal->chip->initialize(thermal->regs, thermal->tshut_polarity);

	for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) {
		enum sensor_id id = thermal->sensors[i].id;

		thermal->chip->set_tshut_mode(id, thermal->regs,
					      thermal->tshut_mode);
		thermal->chip->set_tshut_temp(id, thermal->regs,
					      thermal->tshut_temp);
	}

	thermal->chip->control(thermal->regs, true);

	for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++)
		rockchip_thermal_toggle_sensor(&thermal->sensors[i], true);

	return 0;
}

static SIMPLE_DEV_PM_OPS(rockchip_thermal_pm_ops,
			 rockchip_thermal_suspend, rockchip_thermal_resume);

static struct platform_driver rockchip_thermal_driver = {
	.driver = {
		.name = "rockchip-thermal",
		.pm = &rockchip_thermal_pm_ops,
		.of_match_table = of_rockchip_thermal_match,
	},
	.probe = rockchip_thermal_probe,
	.remove = rockchip_thermal_remove,
};

module_platform_driver(rockchip_thermal_driver);

MODULE_DESCRIPTION("ROCKCHIP THERMAL Driver");
MODULE_AUTHOR("Rockchip, Inc.");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:rockchip-thermal");
Commit	Line	Data
cbac8f63 CW	1	/*
	2	* Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
	3	*
	4	* This program is free software; you can redistribute it and/or modify it
	5	* under the terms and conditions of the GNU General Public License,
	6	* version 2, as published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope it will be useful, but WITHOUT
	9	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	10	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	11	* more details.
	12	*/
	13
	14	#include <linux/clk.h>
	15	#include <linux/delay.h>
	16	#include <linux/interrupt.h>
	17	#include <linux/io.h>
	18	#include <linux/module.h>
	19	#include <linux/of.h>
	20	#include <linux/of_address.h>
	21	#include <linux/of_irq.h>
	22	#include <linux/platform_device.h>
	23	#include <linux/reset.h>
	24	#include <linux/thermal.h>
	25
	26	/**
	27	* If the temperature over a period of time High,
	28	* the resulting TSHUT gave CRU module,let it reset the entire chip,
	29	* or via GPIO give PMIC.
	30	*/
	31	enum tshut_mode {
	32	TSHUT_MODE_CRU = 0,
	33	TSHUT_MODE_GPIO,
	34	};
	35
	36	/**
	37	* the system Temperature Sensors tshut(tshut) polarity
	38	* the bit 8 is tshut polarity.
	39	* 0: low active, 1: high active
	40	*/
	41	enum tshut_polarity {
	42	TSHUT_LOW_ACTIVE = 0,
	43	TSHUT_HIGH_ACTIVE,
	44	};
	45
	46	/**
	47	* The system has three Temperature Sensors. channel 0 is reserved,
	48	* channel 1 is for CPU, and channel 2 is for GPU.
	49	*/
	50	enum sensor_id {
	51	SENSOR_CPU = 1,
	52	SENSOR_GPU,
	53	};
	54
	55	struct rockchip_tsadc_chip {
	56	/* The hardware-controlled tshut property */
	57	long tshut_temp;
	58	enum tshut_mode tshut_mode;
	59	enum tshut_polarity tshut_polarity;
	60
	61	/* Chip-wide methods */
	62	void (initialize)(void __iomem reg, enum tshut_polarity p);
	63	void (irq_ack)(void __iomem reg);
	64	void (control)(void __iomem reg, bool on);
65
66	/* Per-sensor methods */
67	int (get_temp)(int chn, void __iomem reg, long *temp);
68	void (set_tshut_temp)(int chn, void __iomem reg, long temp);
69	void (set_tshut_mode)(int chn, void __iomem reg, enum tshut_mode m);
70	};
71
72	struct rockchip_thermal_sensor {
73	struct rockchip_thermal_data *thermal;
74	struct thermal_zone_device *tzd;
75	enum sensor_id id;
76	};
77
78	#define NUM_SENSORS 2 /* Ignore unused sensor 0 */
79
80	struct rockchip_thermal_data {
81	const struct rockchip_tsadc_chip *chip;
82	struct platform_device *pdev;
83	struct reset_control *reset;
84
85	struct rockchip_thermal_sensor sensors[NUM_SENSORS];
86
87	struct clk *clk;
88	struct clk *pclk;
89
90	void __iomem *regs;
91
92	long tshut_temp;
93	enum tshut_mode tshut_mode;
94	enum tshut_polarity tshut_polarity;
95	};
96
97	/* TSADC V2 Sensor info define: */
98	#define TSADCV2_AUTO_CON 0x04
99	#define TSADCV2_INT_EN 0x08
100	#define TSADCV2_INT_PD 0x0c
101	#define TSADCV2_DATA(chn) (0x20 + (chn) * 0x04)
102	#define TSADCV2_COMP_SHUT(chn) (0x40 + (chn) * 0x04)
103	#define TSADCV2_HIGHT_INT_DEBOUNCE 0x60
104	#define TSADCV2_HIGHT_TSHUT_DEBOUNCE 0x64
105	#define TSADCV2_AUTO_PERIOD 0x68
106	#define TSADCV2_AUTO_PERIOD_HT 0x6c
107
108	#define TSADCV2_AUTO_EN BIT(0)
109	#define TSADCV2_AUTO_DISABLE ~BIT(0)
110	#define TSADCV2_AUTO_SRC_EN(chn) BIT(4 + (chn))
111	#define TSADCV2_AUTO_TSHUT_POLARITY_HIGH BIT(8)
112	#define TSADCV2_AUTO_TSHUT_POLARITY_LOW ~BIT(8)
113
114	#define TSADCV2_INT_SRC_EN(chn) BIT(chn)
115	#define TSADCV2_SHUT_2GPIO_SRC_EN(chn) BIT(4 + (chn))
116	#define TSADCV2_SHUT_2CRU_SRC_EN(chn) BIT(8 + (chn))
117
118	#define TSADCV2_INT_PD_CLEAR ~BIT(8)
119
120	#define TSADCV2_DATA_MASK 0xfff
121	#define TSADCV2_HIGHT_INT_DEBOUNCE_COUNT 4
122	#define TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT 4
123	#define TSADCV2_AUTO_PERIOD_TIME 250 /* msec */
124	#define TSADCV2_AUTO_PERIOD_HT_TIME 50 /* msec */
125
126	struct tsadc_table {
127	unsigned long code;
128	long temp;
129	};
130
131	static const struct tsadc_table v2_code_table[] = {
132	{TSADCV2_DATA_MASK, -40000},
133	{3800, -40000},
134	{3792, -35000},
135	{3783, -30000},
136	{3774, -25000},
137	{3765, -20000},
138	{3756, -15000},
139	{3747, -10000},
140	{3737, -5000},
141	{3728, 0},
142	{3718, 5000},
143	{3708, 10000},
144	{3698, 15000},
145	{3688, 20000},
146	{3678, 25000},
147	{3667, 30000},
148	{3656, 35000},
149	{3645, 40000},
150	{3634, 45000},
151	{3623, 50000},
152	{3611, 55000},
153	{3600, 60000},
154	{3588, 65000},
155	{3575, 70000},
156	{3563, 75000},
157	{3550, 80000},
158	{3537, 85000},
159	{3524, 90000},
160	{3510, 95000},
161	{3496, 100000},
162	{3482, 105000},
163	{3467, 110000},
164	{3452, 115000},
165	{3437, 120000},
166	{3421, 125000},
167	{0, 125000},
168	};
169
170	static u32 rk_tsadcv2_temp_to_code(long temp)
171	{
172	int high, low, mid;
173
174	low = 0;
175	high = ARRAY_SIZE(v2_code_table) - 1;
176	mid = (high + low) / 2;
177
178	if (temp < v2_code_table[low].temp \|\| temp > v2_code_table[high].temp)
179	return 0;
180
181	while (low <= high) {
182	if (temp == v2_code_table[mid].temp)
183	return v2_code_table[mid].code;
184	else if (temp < v2_code_table[mid].temp)
185	high = mid - 1;
186	else
187	low = mid + 1;
188	mid = (low + high) / 2;
189	}
190
191	return 0;
192	}
193
194	static long rk_tsadcv2_code_to_temp(u32 code)
195	{
196	int high, low, mid;
197
198	low = 0;
199	high = ARRAY_SIZE(v2_code_table) - 1;
200	mid = (high + low) / 2;
201
202	if (code > v2_code_table[low].code \|\| code < v2_code_table[high].code)
203	return 125000; /* No code available, return max temperature */
204
205	while (low <= high) {
206	if (code >= v2_code_table[mid].code && code <
207	v2_code_table[mid - 1].code)
208	return v2_code_table[mid].temp;
209	else if (code < v2_code_table[mid].code)
210	low = mid + 1;
211	else
212	high = mid - 1;
213	mid = (low + high) / 2;
214	}
215
216	return 125000;
217	}
218
219	/**
220	* rk_tsadcv2_initialize - initialize TASDC Controller
221	* (1) Set TSADCV2_AUTO_PERIOD, configure the interleave between
222	* every two accessing of TSADC in normal operation.
223	* (2) Set TSADCV2_AUTO_PERIOD_HT, configure the interleave between
224	* every two accessing of TSADC after the temperature is higher
225	* than COM_SHUT or COM_INT.
226	* (3) Set TSADCV2_HIGH_INT_DEBOUNCE and TSADC_HIGHT_TSHUT_DEBOUNCE,
227	* if the temperature is higher than COMP_INT or COMP_SHUT for
228	* "debounce" times, TSADC controller will generate interrupt or TSHUT.
229	*/
230	static void rk_tsadcv2_initialize(void __iomem *regs,
231	enum tshut_polarity tshut_polarity)
232	{
233	if (tshut_polarity == TSHUT_HIGH_ACTIVE)
234	writel_relaxed(0 \| (TSADCV2_AUTO_TSHUT_POLARITY_HIGH),
235	regs + TSADCV2_AUTO_CON);
236	else
237	writel_relaxed(0 \| (TSADCV2_AUTO_TSHUT_POLARITY_LOW),
238	regs + TSADCV2_AUTO_CON);
239
240	writel_relaxed(TSADCV2_AUTO_PERIOD_TIME, regs + TSADCV2_AUTO_PERIOD);
241	writel_relaxed(TSADCV2_HIGHT_INT_DEBOUNCE_COUNT,
242	regs + TSADCV2_HIGHT_INT_DEBOUNCE);
243	writel_relaxed(TSADCV2_AUTO_PERIOD_HT_TIME,
244	regs + TSADCV2_AUTO_PERIOD_HT);
245	writel_relaxed(TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT,
246	regs + TSADCV2_HIGHT_TSHUT_DEBOUNCE);
247	}
248
249	static void rk_tsadcv2_irq_ack(void __iomem *regs)
250	{
251	u32 val;
252
253	val = readl_relaxed(regs + TSADCV2_INT_PD);
254	writel_relaxed(val & TSADCV2_INT_PD_CLEAR, regs + TSADCV2_INT_PD);
255	}
256
257	static void rk_tsadcv2_control(void __iomem *regs, bool enable)
258	{
259	u32 val;
260
261	val = readl_relaxed(regs + TSADCV2_AUTO_CON);
262	if (enable)
263	val \|= TSADCV2_AUTO_EN;
264	else
265	val &= ~TSADCV2_AUTO_EN;
266
267	writel_relaxed(val, regs + TSADCV2_AUTO_CON);
268	}
269
270	static int rk_tsadcv2_get_temp(int chn, void __iomem regs, long temp)
271	{
272	u32 val;
273
274	/* the A/D value of the channel last conversion need some time */
275	val = readl_relaxed(regs + TSADCV2_DATA(chn));
276	if (val == 0)
277	return -EAGAIN;
278
279	*temp = rk_tsadcv2_code_to_temp(val);
280
281	return 0;
282	}
283
284	static void rk_tsadcv2_tshut_temp(int chn, void __iomem *regs, long temp)
285	{
286	u32 tshut_value, val;
287
288	tshut_value = rk_tsadcv2_temp_to_code(temp);
289	writel_relaxed(tshut_value, regs + TSADCV2_COMP_SHUT(chn));
290
291	/* TSHUT will be valid */
292	val = readl_relaxed(regs + TSADCV2_AUTO_CON);
293	writel_relaxed(val \| TSADCV2_AUTO_SRC_EN(chn), regs + TSADCV2_AUTO_CON);
294	}
295
296	static void rk_tsadcv2_tshut_mode(int chn, void __iomem *regs,
297	enum tshut_mode mode)
298	{
299	u32 val;
300
301	val = readl_relaxed(regs + TSADCV2_INT_EN);
302	if (mode == TSHUT_MODE_GPIO) {
303	val &= ~TSADCV2_SHUT_2CRU_SRC_EN(chn);
304	val \|= TSADCV2_SHUT_2GPIO_SRC_EN(chn);
305	} else {
306	val &= ~TSADCV2_SHUT_2GPIO_SRC_EN(chn);
307	val \|= TSADCV2_SHUT_2CRU_SRC_EN(chn);
308	}
309
310	writel_relaxed(val, regs + TSADCV2_INT_EN);
311	}
312
313	static const struct rockchip_tsadc_chip rk3288_tsadc_data = {
314	.tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */
315	.tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */
316	.tshut_temp = 95000,
317
318	.initialize = rk_tsadcv2_initialize,
319	.irq_ack = rk_tsadcv2_irq_ack,
320	.control = rk_tsadcv2_control,
321	.get_temp = rk_tsadcv2_get_temp,
322	.set_tshut_temp = rk_tsadcv2_tshut_temp,
323	.set_tshut_mode = rk_tsadcv2_tshut_mode,
324	};
325
326	static const struct of_device_id of_rockchip_thermal_match[] = {
327	{
328	.compatible = "rockchip,rk3288-tsadc",
329	.data = (void *)&rk3288_tsadc_data,
330	},
331	{ /* end */ },
332	};
333	MODULE_DEVICE_TABLE(of, of_rockchip_thermal_match);
334
335	static void
336	rockchip_thermal_toggle_sensor(struct rockchip_thermal_sensor *sensor, bool on)
337	{
338	struct thermal_zone_device *tzd = sensor->tzd;
339
340	tzd->ops->set_mode(tzd,
341	on ? THERMAL_DEVICE_ENABLED : THERMAL_DEVICE_DISABLED);
342	}
343
344	static irqreturn_t rockchip_thermal_alarm_irq_thread(int irq, void *dev)
345	{
346	struct rockchip_thermal_data *thermal = dev;
347	int i;
348
349	dev_dbg(&thermal->pdev->dev, "thermal alarm\n");
350
351	thermal->chip->irq_ack(thermal->regs);
352
353	for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++)
354	thermal_zone_device_update(thermal->sensors[i].tzd);
355
356	return IRQ_HANDLED;
357	}
358
359	static int rockchip_thermal_get_temp(void _sensor, long out_temp)
360	{
361	struct rockchip_thermal_sensor *sensor = _sensor;
362	struct rockchip_thermal_data *thermal = sensor->thermal;
363	const struct rockchip_tsadc_chip *tsadc = sensor->thermal->chip;
364	int retval;
365
366	retval = tsadc->get_temp(sensor->id, thermal->regs, out_temp);
367	dev_dbg(&thermal->pdev->dev, "sensor %d - temp: %ld, retval: %d\n",
368	sensor->id, *out_temp, retval);
369
370	return retval;
371	}
372
373	static const struct thermal_zone_of_device_ops rockchip_of_thermal_ops = {
374	.get_temp = rockchip_thermal_get_temp,
375	};
376
377	static int rockchip_configure_from_dt(struct device *dev,
378	struct device_node *np,
379	struct rockchip_thermal_data *thermal)
380	{
381	u32 shut_temp, tshut_mode, tshut_polarity;
382
383	if (of_property_read_u32(np, "rockchip,hw-tshut-temp", &shut_temp)) {
384	dev_warn(dev,
385	"Missing tshut temp property, using default %ld\n",
386	thermal->chip->tshut_temp);
387	thermal->tshut_temp = thermal->chip->tshut_temp;
388	} else {
389	thermal->tshut_temp = shut_temp;
390	}
391
392	if (thermal->tshut_temp > INT_MAX) {
393	dev_err(dev, "Invalid tshut temperature specified: %ld\n",
394	thermal->tshut_temp);
395	return -ERANGE;
396	}
397
398	if (of_property_read_u32(np, "rockchip,hw-tshut-mode", &tshut_mode)) {
399	dev_warn(dev,
400	"Missing tshut mode property, using default (%s)\n",
401	thermal->chip->tshut_mode == TSHUT_MODE_GPIO ?
402	"gpio" : "cru");
403	thermal->tshut_mode = thermal->chip->tshut_mode;
404	} else {
405	thermal->tshut_mode = tshut_mode;
406	}
407
408	if (thermal->tshut_mode > 1) {
409	dev_err(dev, "Invalid tshut mode specified: %d\n",
410	thermal->tshut_mode);
411	return -EINVAL;
412	}
413
414	if (of_property_read_u32(np, "rockchip,hw-tshut-polarity",
415	&tshut_polarity)) {
416	dev_warn(dev,
417	"Missing tshut-polarity property, using default (%s)\n",
418	thermal->chip->tshut_polarity == TSHUT_LOW_ACTIVE ?
419	"low" : "high");
420	thermal->tshut_polarity = thermal->chip->tshut_polarity;
421	} else {
422	thermal->tshut_polarity = tshut_polarity;
423	}
424
425	if (thermal->tshut_polarity > 1) {
426	dev_err(dev, "Invalid tshut-polarity specified: %d\n",
427	thermal->tshut_polarity);
428	return -EINVAL;
429	}
430
431	return 0;
432	}
433
434	static int
435	rockchip_thermal_register_sensor(struct platform_device *pdev,
436	struct rockchip_thermal_data *thermal,
437	struct rockchip_thermal_sensor *sensor,
438	enum sensor_id id)
439	{
440	const struct rockchip_tsadc_chip *tsadc = thermal->chip;
441	int error;
442
443	tsadc->set_tshut_mode(id, thermal->regs, thermal->tshut_mode);
444	tsadc->set_tshut_temp(id, thermal->regs, thermal->tshut_temp);
445
446	sensor->thermal = thermal;
447	sensor->id = id;
448	sensor->tzd = thermal_zone_of_sensor_register(&pdev->dev, id, sensor,
449	&rockchip_of_thermal_ops);
450	if (IS_ERR(sensor->tzd)) {
451	error = PTR_ERR(sensor->tzd);
452	dev_err(&pdev->dev, "failed to register sensor %d: %d\n",
453	id, error);
454	return error;
455	}
456
457	return 0;
458	}
459
460	/*
461	* Reset TSADC Controller, reset all tsadc registers.
462	*/
463	static void rockchip_thermal_reset_controller(struct reset_control *reset)
464	{
465	reset_control_assert(reset);
466	usleep_range(10, 20);
467	reset_control_deassert(reset);
468	}
469
470	static int rockchip_thermal_probe(struct platform_device *pdev)
471	{
472	struct device_node *np = pdev->dev.of_node;
473	struct rockchip_thermal_data *thermal;
474	const struct of_device_id *match;
475	struct resource *res;
476	int irq;
477	int i;
478	int error;
479
480	match = of_match_node(of_rockchip_thermal_match, np);
481	if (!match)
482	return -ENXIO;
483
484	irq = platform_get_irq(pdev, 0);
485	if (irq < 0) {
486	dev_err(&pdev->dev, "no irq resource?\n");
487	return -EINVAL;
488	}
489
490	thermal = devm_kzalloc(&pdev->dev, sizeof(struct rockchip_thermal_data),
491	GFP_KERNEL);
492	if (!thermal)
493	return -ENOMEM;
494
495	thermal->pdev = pdev;
496
497	thermal->chip = (const struct rockchip_tsadc_chip *)match->data;
498	if (!thermal->chip)
499	return -EINVAL;
500
501	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
502	thermal->regs = devm_ioremap_resource(&pdev->dev, res);
503	if (IS_ERR(thermal->regs))
504	return PTR_ERR(thermal->regs);
505
506	thermal->reset = devm_reset_control_get(&pdev->dev, "tsadc-apb");
507	if (IS_ERR(thermal->reset)) {
508	error = PTR_ERR(thermal->reset);
509	dev_err(&pdev->dev, "failed to get tsadc reset: %d\n", error);
510	return error;
511	}
512
513	thermal->clk = devm_clk_get(&pdev->dev, "tsadc");
514	if (IS_ERR(thermal->clk)) {
515	error = PTR_ERR(thermal->clk);
516	dev_err(&pdev->dev, "failed to get tsadc clock: %d\n", error);
517	return error;
518	}
519
520	thermal->pclk = devm_clk_get(&pdev->dev, "apb_pclk");
521	if (IS_ERR(thermal->pclk)) {
522	error = PTR_ERR(thermal->clk);
523	dev_err(&pdev->dev, "failed to get apb_pclk clock: %d\n",
524	error);
525	return error;
526	}
527
528	error = clk_prepare_enable(thermal->clk);
529	if (error) {
530	dev_err(&pdev->dev, "failed to enable converter clock: %d\n",
531	error);
532	return error;
533	}
534
535	error = clk_prepare_enable(thermal->pclk);
536	if (error) {
537	dev_err(&pdev->dev, "failed to enable pclk: %d\n", error);
538	goto err_disable_clk;
539	}
540
541	rockchip_thermal_reset_controller(thermal->reset);
542
543	error = rockchip_configure_from_dt(&pdev->dev, np, thermal);
544	if (error) {
545	dev_err(&pdev->dev, "failed to parse device tree data: %d\n",
546	error);
547	goto err_disable_pclk;
548	}
549
550	thermal->chip->initialize(thermal->regs, thermal->tshut_polarity);
551
552	error = rockchip_thermal_register_sensor(pdev, thermal,
553	&thermal->sensors[0],
554	SENSOR_CPU);
555	if (error) {
556	dev_err(&pdev->dev,
557	"failed to register CPU thermal sensor: %d\n", error);
558	goto err_disable_pclk;
559	}
560
561	error = rockchip_thermal_register_sensor(pdev, thermal,
562	&thermal->sensors[1],
563	SENSOR_GPU);
564	if (error) {
565	dev_err(&pdev->dev,
566	"failed to register GPU thermal sensor: %d\n", error);
567	goto err_unregister_cpu_sensor;
568	}
569
570	error = devm_request_threaded_irq(&pdev->dev, irq, NULL,
571	&rockchip_thermal_alarm_irq_thread,
572	IRQF_ONESHOT,
573	"rockchip_thermal", thermal);
574	if (error) {
575	dev_err(&pdev->dev,
576	"failed to request tsadc irq: %d\n", error);
577	goto err_unregister_gpu_sensor;
578	}
579
580	thermal->chip->control(thermal->regs, true);
581
582	for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++)
583	rockchip_thermal_toggle_sensor(&thermal->sensors[i], true);
584
585	platform_set_drvdata(pdev, thermal);
586
587	return 0;
588
589	err_unregister_gpu_sensor:
590	thermal_zone_of_sensor_unregister(&pdev->dev, thermal->sensors[1].tzd);
591	err_unregister_cpu_sensor:
592	thermal_zone_of_sensor_unregister(&pdev->dev, thermal->sensors[0].tzd);
593	err_disable_pclk:
594	clk_disable_unprepare(thermal->pclk);
595	err_disable_clk:
596	clk_disable_unprepare(thermal->clk);
597
598	return error;
599	}
600
601	static int rockchip_thermal_remove(struct platform_device *pdev)
602	{
603	struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev);
604	int i;
605
606	for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) {
607	struct rockchip_thermal_sensor *sensor = &thermal->sensors[i];
608
609	rockchip_thermal_toggle_sensor(sensor, false);
610	thermal_zone_of_sensor_unregister(&pdev->dev, sensor->tzd);
611	}
612
613	thermal->chip->control(thermal->regs, false);
614
615	clk_disable_unprepare(thermal->pclk);
616	clk_disable_unprepare(thermal->clk);
617
618	return 0;
619	}
620
621	static int __maybe_unused rockchip_thermal_suspend(struct device *dev)
622	{
623	struct platform_device *pdev = to_platform_device(dev);
624	struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev);
625	int i;
626
627	for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++)
628	rockchip_thermal_toggle_sensor(&thermal->sensors[i], false);
629
630	thermal->chip->control(thermal->regs, false);
631
632	clk_disable(thermal->pclk);
633	clk_disable(thermal->clk);
634
635	return 0;
636	}
637
638	static int __maybe_unused rockchip_thermal_resume(struct device *dev)
639	{
640	struct platform_device *pdev = to_platform_device(dev);
641	struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev);
642	int i;
643	int error;
644
645	error = clk_enable(thermal->clk);
646	if (error)
647	return error;
648
649	error = clk_enable(thermal->pclk);
650	if (error)
651	return error;
652
653	rockchip_thermal_reset_controller(thermal->reset);
654
655	thermal->chip->initialize(thermal->regs, thermal->tshut_polarity);
656
657	for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) {
658	enum sensor_id id = thermal->sensors[i].id;
659
660	thermal->chip->set_tshut_mode(id, thermal->regs,
661	thermal->tshut_mode);
662	thermal->chip->set_tshut_temp(id, thermal->regs,
663	thermal->tshut_temp);
664	}
665
666	thermal->chip->control(thermal->regs, true);
667
668	for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++)
669	rockchip_thermal_toggle_sensor(&thermal->sensors[i], true);
670
671	return 0;
672	}
673
674	static SIMPLE_DEV_PM_OPS(rockchip_thermal_pm_ops,
675	rockchip_thermal_suspend, rockchip_thermal_resume);
676
677	static struct platform_driver rockchip_thermal_driver = {
678	.driver = {
679	.name = "rockchip-thermal",
cbac8f63 CW	680	.pm = &rockchip_thermal_pm_ops,
	681	.of_match_table = of_rockchip_thermal_match,
	682	},
	683	.probe = rockchip_thermal_probe,
	684	.remove = rockchip_thermal_remove,
	685	};
	686
	687	module_platform_driver(rockchip_thermal_driver);
	688
	689	MODULE_DESCRIPTION("ROCKCHIP THERMAL Driver");
	690	MODULE_AUTHOR("Rockchip, Inc.");
	691	MODULE_LICENSE("GPL v2");
	692	MODULE_ALIAS("platform:rockchip-thermal");