Message-ID: <544F0F53.7000406@rock-chips.com>
Date:	Tue, 28 Oct 2014 11:36:51 +0800
From:	Caesar Wang <caesar.wang@...k-chips.com>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
CC:	heiko@...ech.de, rui.zhang@...el.com, edubezval@...il.com,
	zyf@...k-chips.com, dianders@...omium.org,
	linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-pm@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	devicetree@...r.kernel.org, linux-doc@...r.kernel.org,
	cf@...k-chips.com, dbasehore@...omium.org, huangtao@...k-chips.com,
	cjf@...k-chips.com, zhengsq@...k-chips.com
Subject: Re: [PATCH v14 1/5] thermal: rockchip: add driver for thermal

Dmitry,

在 2014年10月28日 08:32, Dmitry Torokhov 写道:
> Hi Caesar,
>
> On Mon, Oct 27, 2014 at 10:39:44AM +0800, Caesar Wang wrote:
>> Thermal is TS-ADC Controller module supports
>> user-defined mode and automatic mode.
>>
>> User-defined mode refers,TSADC all the control signals entirely by
>> software writing to register for direct control.
>>
>> Automaic mode refers to the module automatically poll TSADC output,
>> and the results were checked.If you find that the temperature High
>> in a period of time,an interrupt is generated to the processor
>> down-measures taken;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.
>>
>> Signed-off-by: zhaoyifeng <zyf@...k-chips.com>
>> Signed-off-by: Caesar Wang <caesar.wang@...k-chips.com>
> I think the driver looks really good now, just a couple more comments.
>
>> ---
>>   drivers/thermal/Kconfig            |   9 +
>>   drivers/thermal/Makefile           |   1 +
>>   drivers/thermal/rockchip_thermal.c | 699 +++++++++++++++++++++++++++++++++++++
>>   3 files changed, 709 insertions(+)
>>   create mode 100644 drivers/thermal/rockchip_thermal.c
>>
>> diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig
>> index ef5587f..5efcf73 100644
>> --- a/drivers/thermal/Kconfig
>> +++ b/drivers/thermal/Kconfig
>> @@ -133,6 +133,15 @@ config SPEAR_THERMAL
>>   	  Enable this to plug the SPEAr thermal sensor driver into the Linux
>>   	  thermal framework.
>>   
>> +config ROCKCHIP_THERMAL
>> +	tristate "Rockchip thermal driver"
>> +	depends on ARCH_ROCKCHIP
>> +	help
>> +	  Rockchip thermal driver provides support for Temperature sensor
>> +	  ADC (TS-ADC) found on Rockchip SoCs. It supports one critical
>> +	  trip point. Cpufreq is used as the cooling device and will throttle
>> +	  CPUs when the Temperature crosses the passive trip point.
>> +
>>   config RCAR_THERMAL
>>   	tristate "Renesas R-Car thermal driver"
>>   	depends on ARCH_SHMOBILE || COMPILE_TEST
>> diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile
>> index 31e232f..21da0a8 100644
>> --- a/drivers/thermal/Makefile
>> +++ b/drivers/thermal/Makefile
>> @@ -19,6 +19,7 @@ thermal_sys-$(CONFIG_CPU_THERMAL)	+= cpu_cooling.o
>>   
>>   # platform thermal drivers
>>   obj-$(CONFIG_SPEAR_THERMAL)	+= spear_thermal.o
>> +obj-$(CONFIG_ROCKCHIP_THERMAL)	+= rockchip_thermal.o
>>   obj-$(CONFIG_RCAR_THERMAL)	+= rcar_thermal.o
>>   obj-$(CONFIG_KIRKWOOD_THERMAL)  += kirkwood_thermal.o
>>   obj-y				+= samsung/
>> diff --git a/drivers/thermal/rockchip_thermal.c b/drivers/thermal/rockchip_thermal.c
>> new file mode 100644
>> index 0000000..99ca305
>> --- /dev/null
>> +++ b/drivers/thermal/rockchip_thermal.c
>> @@ -0,0 +1,699 @@
>> +/*
>> + * 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/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/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 {
>> +	long hw_shut_temp;
>> +	enum tshut_mode tshut_mode;
>> +	enum tshut_polarity tshut_polarity;
>> +
>> +	/* Chip-wide methods */
>> +	void (*initialize)(void __iomem *reg, enum tshut_polarity p,
>> +			   unsigned long clk_rate);
>> +	void (*irq_ack)(void __iomem *reg);
>> +
>> +	/* Per-sensor methods */
>> +	int (*get_temp)(int chn, void __iomem *reg, long *temp);
>> +	void (*set_alarm_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);
>> +	void (*control)(int chn, void __iomem *reg, bool on);
>> +};
>> +
>> +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 rockchip_thermal_sensor sensors[NUM_SENSORS];
>> +
>> +	struct thermal_cooling_device *cdev;

Removed, cooling cdev don't need.

>> +
>> +	struct clk *clk;
>> +	struct clk *pclk;
>> +
>> +	void __iomem *regs;
>> +
>> +	unsigned long clk_rate;
>> +
>> +	long hw_shut_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_INT(chn)		        (0x30 + (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,
>> +				  unsigned long clk_rate)
>> +{
>> +	u32 val;
>> +
>> +	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);
>> +
>> +	val = TSADCV2_AUTO_PERIOD_TIME * clk_rate / 1000;
>> +	writel_relaxed(val, regs + TSADCV2_AUTO_PERIOD);
>> +	writel_relaxed(TSADCV2_HIGHT_INT_DEBOUNCE_COUNT,
>> +		       regs + TSADCV2_HIGHT_INT_DEBOUNCE);
>> +
>> +	val = TSADCV2_AUTO_PERIOD_HT_TIME * clk_rate / 1000;
>> +	writel_relaxed(val, 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 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_alarm_temp(int chn, void __iomem *regs, long temp)
>> +{
>> +	u32 alarm_value, int_en;
>> +
>> +	alarm_value = rk_tsadcv2_temp_to_code(temp);
>> +	writel_relaxed(alarm_value & TSADCV2_DATA_MASK,
>> +		       regs + TSADCV2_COMP_INT(chn));
>> +
>> +	int_en = readl_relaxed(regs + TSADCV2_INT_EN);
>> +	int_en |= TSADCV2_INT_SRC_EN(chn);
>> +	writel_relaxed(int_en, regs + TSADCV2_INT_EN);
>> +}
>> +
>> +static void rk_tsadcv2_tshut_temp(int chn, void __iomem *regs, long temp)
>> +{
>> +	u32 tshut_value;
>> +
>> +	tshut_value = rk_tsadcv2_temp_to_code(temp);
>> +	writel_relaxed(tshut_value, regs + TSADCV2_COMP_SHUT(chn));
>> +}
>> +
>> +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);
>> +
>> +	/* TSHUT will be valid */
>> +	val = readl_relaxed(regs + TSADCV2_AUTO_CON);
>> +	writel_relaxed(val | TSADCV2_AUTO_SRC_EN(chn), regs + TSADCV2_AUTO_CON);
> I think this should be done after we set the target temperature since we
> do not know if it is currently valid or not. Please move into
> rk_tsadcv2_tshut_temp().
>

Fixed.

>> +}
>> +
>> +static void rk_tsadcv2_control(int chn, 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);
> This is not channel-specific, so we should drop the id argument.

Fixed.

>> +}
>> +
>> +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 */
>> +	.hw_shut_temp = 125000,
>> +
>> +	.initialize = rk_tsadcv2_initialize,
>> +	.irq_ack = rk_tsadcv2_irq_ack,
>> +	.get_temp = rk_tsadcv2_get_temp,
>> +	.set_alarm_temp = rk_tsadcv2_alarm_temp,
>> +	.set_tshut_temp = rk_tsadcv2_tshut_temp,
>> +	.set_tshut_mode = rk_tsadcv2_tshut_mode,
>> +	.control = rk_tsadcv2_control,
>> +};
>> +
>> +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_set_trips(void *_sensor, long low, long high)
>> +{
>> +	struct rockchip_thermal_sensor *sensor = _sensor;
>> +	struct rockchip_thermal_data *thermal = sensor->thermal;
>> +	const struct rockchip_tsadc_chip *tsadc = thermal->chip;
>> +
>> +	dev_dbg(&thermal->pdev->dev, "%s: sensor %d: low: %ld, high %ld\n",
>> +		__func__, sensor->id, low, high);
>> +
>> +	tsadc->set_alarm_temp(sensor->id, thermal->regs, high);
>> +
>> +	return 0;
>> +}
>> +
>> +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 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, "hw-shut-temp", &shut_temp)) {
>> +		dev_warn(dev,
>> +			 "Missing tshut temp property, using default %ld\n",
>> +			 thermal->chip->hw_shut_temp);
>> +		thermal->hw_shut_temp = thermal->chip->hw_shut_temp;
>> +	} else {
>> +		thermal->hw_shut_temp = shut_temp;
>> +	}
>> +
>> +	if (thermal->hw_shut_temp > INT_MAX) {
>> +		dev_err(dev, "Invalid tshut temperature specified: %u\n",
>> +			thermal->hw_shut_temp);
>> +		return -ERANGE;
>> +	}
>> +
>> +	if (of_property_read_u32(np, "tsadc-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, "tsadc-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->hw_shut_temp);
>> +	thermal->chip->control(id, thermal->regs, true);
>> +
>> +	sensor->thermal = thermal;
>> +	sensor->id = id;
>> +	sensor->tzd = thermal_zone_of_sensor_register(&pdev->dev, id, sensor,
>> +						rockchip_thermal_get_temp,
>> +						NULL,
>> +						rockchip_thermal_set_trips);
>> +	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;
>> +}
>> +
>> +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->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;
>> +	}
>> +
>> +	thermal->clk_rate = clk_get_rate(thermal->clk);
>> +	if (thermal->clk_rate == 0)
>> +		return -EPROBE_DEFER;
>> +
>> +	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,
>> +				  thermal->clk_rate);
>> +
>> +	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;
>> +	}
>> +
>> +	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);
>> +	}
>> +
>> +	clk_disable_unprepare(thermal->clk);
>> +	clk_disable_unprepare(thermal->pclk);
>> +
>> +	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(i, thermal->regs, false);
>> +	}
>> +
>> +	clk_disable(thermal->clk);
>> +	clk_disable(thermal->pclk);
>> +
>> +	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->pclk);
>> +	if (error)
>> +		return error;
>> +
>> +	error = clk_enable(thermal->clk);
>> +	if (error)
>> +		return error;
>> +
>> +	thermal->chip->initialize(thermal->regs, thermal->tshut_polarity,
>> +				  thermal->clk_rate);
>> +
>> +	for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) {
>> +		thermal->chip->control(i, thermal->regs, true);
>> +		rockchip_thermal_toggle_sensor(&thermal->sensors[i], true);
>> +	}
> I think we should also restore tshut mode and temperature here as well.

Fixed.

>> +
>> +	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",
>> +		.owner = THIS_MODULE,
>> +		.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");
>> -- 
>> 1.9.1
>>
>>
> Thanks.
>

-- 
Best regards,
Caesar


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