Re: [PATCH v2 1/2] thermal: rockchip: add driver for thermal

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On Thu, Aug 28, 2014 at 01:18:12AM +0800, Caesar Wang wrote:
> Hi Dmtry,
> 
> 在 2014年08月27日 08:11, Dmitry Torokhov 写道:
> >Hi Caesar,
> >
> >On Wed, Aug 27, 2014 at 07:41:42AM +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@xxxxxxxxxxxxxx>
> >>Signed-off-by: Caesar Wang <caesar.wang@xxxxxxxxxxxxxx>
> >>Change-Id: I00e7df78c497704657aff16e602aa56b4c14c6f5
> >>---
> >>  drivers/thermal/Kconfig            |    9 +
> >>  drivers/thermal/Makefile           |    1 +
> >>  drivers/thermal/rockchip_thermal.c |  644 ++++++++++++++++++++++++++++++++++++
> >>  3 files changed, 654 insertions(+)
> >>  create mode 100644 drivers/thermal/rockchip_thermal.c
> >>
> >>diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig
> >>index 74226dc..43d2400 100644
> >>--- a/drivers/thermal/Kconfig
> >>+++ b/drivers/thermal/Kconfig
> >>@@ -141,6 +141,15 @@ 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
> >>+	  Support for Temperature Sensor ADC (TS-ADC) found on Rockchip SoCs.
> >>+	  It supports one critical trip point and one passive trip point.  The
> >>+	  cpufreq is used as the cooling device to throttle CPUs when the
> >>+	  passive trip is crossed.
> >>+
> >>  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 419c3cd..009a457 100644
> >>--- a/drivers/thermal/Makefile
> >>+++ b/drivers/thermal/Makefile
> >>@@ -20,6 +20,7 @@ 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..dea4dc3
> >>--- /dev/null
> >>+++ b/drivers/thermal/rockchip_thermal.c
> >>@@ -0,0 +1,644 @@
> >>+/*
> >>+ * 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/io.h>
> >>+#include <linux/interrupt.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/regulator/consumer.h>
> >>+#include <linux/cpu_cooling.h>
> >>+#include "thermal_core.h"
> >>+
> >>+enum rockchip_thermal_trip {
> >>+	ROCKCHIP_TRIP_PASSIVE,
> >>+	ROCKCHIP_TRIP_CRITICAL,
> >>+	ROCKCHIP_TRIP_NUM,
> >>+};
> >>+
> >>+struct rockchip_thermal_data {
> >>+	const struct rockchip_tsadc_platform_data *pdata;
> >>+	struct thermal_zone_device *tz;
> >>+	struct thermal_cooling_device *cdev;
> >>+	enum thermal_device_mode mode;
> >>+	void __iomem *regs;
> >>+
> >>+	signed long temp_passive;
> >>+	signed long temp_critical;
> >>+	signed long temp_force_shut;
> >>+	signed long alarm_temp;
> >>+	signed long last_temp;
> >>+	bool irq_enabled;
> >>+	int irq;
> >>+	struct clk *tsadc_clk;
> >>+	struct clk *tsadc_pclk;
> >>+};
> >>+
> >>+struct rockchip_tsadc_platform_data {
> >>+	u8 irq_en;
> >>+	signed long temp_passive;
> >>+	signed long temp_critical;
> >>+	signed long temp_force_shut;
> >>+	int passive_delay;
> >>+	int polling_delay;
> >>+
> >>+	int (*irq_handle)(void __iomem *reg);
> >>+	int (*initialize)(void __iomem *reg, signed long temp_force_shut);
> >>+	int (*control)(void __iomem *reg, bool on);
> >>+	u32 (*code_to_temp)(int temp);
> >>+	u32 (*temp_to_code)(int temp);
> >>+	void (*set_alarm_temp)(void __iomem *regs, signed long temp);
> >>+};
> >>+
> >>+/*TSADC V2 Sensor info define:*/
> >>+#define TSADCV2_AUTO_CON			0x04
> >>+#define TSADCV2_INT_EN				0x08
> >>+#define TSADCV2_INT_PD				0x0c
> >>+#define TSADCV2_DATA1				0x24
> >>+#define TSADCV2_COMP1_INT			0x34
> >>+#define TSADCV2_COMP1_SHUT			0x44
> >>+#define TSADCV2_AUTO_PERIOD			0x68
> >>+#define TSADCV2_AUTO_PERIOD_HT			0x6c
> >>+
> >>+#define TSADCV2_AUTO_SRC1_EN			(1 << 5)
> >>+#define TSADCV2_AUTO_EN				(1 << 0)
> >>+#define TSADCV2_AUTO_DISABLE			~(1 << 0)
> >>+#define TSADCV2_AUTO_STAS_BUSY			(1 << 16)
> >>+#define TSADCV2_AUTO_STAS_BUSY_MASK		(1 << 16)
> >>+#define TSADCV2_SHUT_2GPIO_SRC1_EN		(1 << 5)
> >>+#define TSADCV2_INT_SRC1_EN			(1 << 1)
> >>+#define TSADCV2_SHUT_SRC1_STATUS		(1 << 5)
> >>+#define TSADCV2_INT_SRC1_STATUS			(1 << 1)
> >>+
> >>+#define TSADCV2_DATA_MASK			0xfff
> >>+#define TSADCV2_HIGHT_INT_DEBOUNCE		0x60
> >>+#define TSADCV2_HIGHT_TSHUT_DEBOUNCE		0x64
> >>+#define TSADCV2_HIGHT_INT_DEBOUNCE_TIME		0x0a
> >>+#define TSADCV2_HIGHT_TSHUT_DEBOUNCE_TIME	0x0a
> >>+#define TSADCV2_AUTO_PERIOD_TIME		0x03e8
> >>+#define TSADCV2_AUTO_PERIOD_HT_TIME		0x64
> >>+
> >>+struct tsadc_table {
> >>+	int code;
> >>+	int temp;
> >>+};
> >>+
> >>+static const struct tsadc_table v2_code_table[] = {
> >>+	{TSADCV2_DATA_MASK, -40},
> >>+	{3800, -40},
> >>+	{3792, -35},
> >>+	{3783, -30},
> >>+	{3774, -25},
> >>+	{3765, -20},
> >>+	{3756, -15},
> >>+	{3747, -10},
> >>+	{3737, -5},
> >>+	{3728, 0},
> >>+	{3718, 5},
> >>+	{3708, 10},
> >>+	{3698, 15},
> >>+	{3688, 20},
> >>+	{3678, 25},
> >>+	{3667, 30},
> >>+	{3656, 35},
> >>+	{3645, 40},
> >>+	{3634, 45},
> >>+	{3623, 50},
> >>+	{3611, 55},
> >>+	{3600, 60},
> >>+	{3588, 65},
> >>+	{3575, 70},
> >>+	{3563, 75},
> >>+	{3550, 80},
> >>+	{3537, 85},
> >>+	{3524, 90},
> >>+	{3510, 95},
> >>+	{3496, 100},
> >>+	{3482, 105},
> >>+	{3467, 110},
> >>+	{3452, 115},
> >>+	{3437, 120},
> >>+	{3421, 125},
> >>+	{0, 125},
> >>+};
> >>+
> >>+static int rk_tsadcv2_irq_handle(void __iomem *regs)
> >>+{
> >>+	u32 val;
> >>+
> >>+	val = readl_relaxed(regs + TSADCV2_INT_PD);
> >>+	writel_relaxed(val & ~(1 << 8), regs + TSADCV2_INT_PD);
> >>+
> >>+	return 0;
> >>+}
> >>+
> >>+static u32 rk_tsadcv2_temp_to_code(int temp)
> >>+{
> >>+	u32 code = 0;
> >>+	int i;
> >>+
> >>+	for (i = 0; i < ARRAY_SIZE(v2_code_table) - 1; i++) {
> >>+		if (temp <= v2_code_table[i].temp && temp >
> >>+		    v2_code_table[i - 1].temp)
> >Since array is sorted you should be able to do only one comparison, on
> >the upper bound. Also, as soon as you find the code you can return it,
> >there is no need to continue scanning the array.
> 
> sound  reasonable, I will fix it ,as the folllow:
> 
> for (i = 0; i < ARRAY_SIZE(v2_code_table) - 1; i++) {
>         if (temp <= v2_code_table[i].temp && temp >
>             v2_code_table[i - 1].temp){
>             code = v2_code_table[i].code;
>             break;
>         }
> }

Would not the following be a bit simpler:

	for (i = 1; i < ARRAY_SIZE(v2_code_table) - 1; i++)
		if (temp <= v2_code_table[i].temp)
			return v2_code_table[i].code;

	return 0;

> 
> >>+			code = v2_code_table[i].code;
> >>+	}
> >>+	return code;
> >>+}
> >>+
> >>+static u32 rk_tsadcv2_code_to_temp(int code)
> >>+{
> >>+	u32 temp = 0;
> >>+	int i;
> >>+
> >>+	for (i = 0; i < ARRAY_SIZE(v2_code_table) - 1; i++) {
> >>+		if (code <= v2_code_table[i].code && code >
> >>+		    v2_code_table[i + 1].code)
> >>+			temp = v2_code_table[i].temp;
> >>+	}
> >>+	return temp;
> >>+}
> >>+
> Ditto,
> >>+static int rk_tsadcv2_initialize(void __iomem *regs,
> >>+				 signed long temp_force_shut)
> >>+{
> >>+	int shutdown_value;
> >>+
> >>+	shutdown_value = rk_tsadcv2_temp_to_code(temp_force_shut);
> >>+	/* Enable measurements at ~ 10 Hz */
> >>+	writel_relaxed(0, regs + TSADCV2_AUTO_CON);
> >>+	writel_relaxed(TSADCV2_AUTO_PERIOD_TIME, regs + TSADCV2_AUTO_PERIOD);
> >>+	writel_relaxed(TSADCV2_AUTO_PERIOD_HT_TIME, regs +
> >>+		       TSADCV2_AUTO_PERIOD_HT);
> >>+	writel_relaxed(shutdown_value, regs + TSADCV2_COMP1_SHUT);
> >>+	writel_relaxed(TSADCV2_HIGHT_INT_DEBOUNCE_TIME, regs +
> >>+		       TSADCV2_HIGHT_INT_DEBOUNCE);
> >>+	writel_relaxed(TSADCV2_HIGHT_TSHUT_DEBOUNCE_TIME, regs +
> >>+		       TSADCV2_HIGHT_TSHUT_DEBOUNCE);
> >>+	writel_relaxed(TSADCV2_SHUT_2GPIO_SRC1_EN | TSADCV2_INT_SRC1_EN, regs +
> >>+		       TSADCV2_INT_EN);
> >>+	writel_relaxed(TSADCV2_AUTO_SRC1_EN | TSADCV2_AUTO_EN, regs +
> >>+		       TSADCV2_AUTO_CON);
> >>+	return 0;
> >>+}
> >>+
> >>+static int rk_tsadcv2_control(void __iomem *regs, bool on)
> >>+{
> >>+	u32 val;
> >>+
> >>+	if (on) {
> >>+		val = readl_relaxed(regs + TSADCV2_AUTO_CON);
> >>+		writel_relaxed(val | TSADCV2_AUTO_EN, regs + TSADCV2_AUTO_CON);
> >>+	} else {
> >>+		val = readl_relaxed(regs + TSADCV2_AUTO_CON);
> >>+		writel_relaxed(val & TSADCV2_AUTO_DISABLE,
> >>+			       regs + TSADCV2_AUTO_CON);
> >>+	}
> >>+	return 0;
> >>+}
> >>+
> >>+static void rk_tsadcv2_alarm_temp(void __iomem *regs, signed long alarm_temp)
> >>+{
> >>+	int alarm_value;
> >>+
> >>+	alarm_value = rk_tsadcv2_temp_to_code(alarm_temp);
> >>+	writel_relaxed(alarm_value, regs + TSADCV2_COMP1_INT);
> >>+}
> >>+
> >>+struct rockchip_tsadc_platform_data const rk3288_tsadc_data = {
> >>+	.irq_en = 1,
> >>+	.temp_passive = 85000,
> >>+	.temp_critical = 100000,
> >>+	.temp_force_shut = 120000,
> >>+	.passive_delay = 2000,
> >>+	.polling_delay = 1000,
> >>+	.irq_handle = rk_tsadcv2_irq_handle,
> >>+	.initialize = rk_tsadcv2_initialize,
> >>+	.control = rk_tsadcv2_control,
> >>+	.code_to_temp = rk_tsadcv2_code_to_temp,
> >>+	.temp_to_code = rk_tsadcv2_temp_to_code,
> >>+	.set_alarm_temp = rk_tsadcv2_alarm_temp,
> >>+};
> >>+
> >>+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_set_alarm_temp(struct rockchip_thermal_data *data,
> >>+				    signed long alarm_temp)
> >>+{
> >>+	const struct rockchip_tsadc_platform_data *p_tsadc_data = data->pdata;
> >>+
> >>+	data->alarm_temp = alarm_temp;
> >>+	if (p_tsadc_data->set_alarm_temp)
> >>+		p_tsadc_data->set_alarm_temp(data->regs, alarm_temp);
> >>+}
> >>+
> >>+static int rockchip_get_temp(struct thermal_zone_device *tz,
> >>+			     unsigned long *temp)
> >>+{
> >>+	struct rockchip_thermal_data *data = tz->devdata;
> >>+	const struct rockchip_tsadc_platform_data *p_tsadc_data = data->pdata;
> >>+	u32 val;
> >>+
> >>+	val = readl_relaxed(data->regs + TSADCV2_DATA1);
> >>+	*temp = p_tsadc_data->code_to_temp(val);
> >>+
> >>+	/* Update alarm value to next higher trip point */
> >>+	if (data->alarm_temp == data->temp_passive && *temp >=
> >>+	    data->temp_passive)
> >>+		rockchip_set_alarm_temp(data, data->temp_critical);
> >>+
> >>+	if (data->alarm_temp == data->temp_critical && *temp <
> >>+	    data->temp_passive) {
> >>+		rockchip_set_alarm_temp(data, data->temp_passive);
> >>+		dev_dbg(&tz->device, "thermal alarm off: T < %lu\n",
> >>+			data->alarm_temp / 1000);
> >>+	}
> >>+
> >>+	if (*temp != data->last_temp) {
> >>+		dev_dbg(&tz->device, "millicelsius: %ld\n", *temp);
> >>+		data->last_temp = *temp;
> >>+	}
> >>+
> >>+	/* Reenable alarm IRQ if temperature below alarm temperature */
> >>+	if (!data->irq_enabled && *temp < data->alarm_temp) {
> >>+		data->irq_enabled = true;
> >>+		enable_irq(data->irq);
> >>+	}
> >>+	return 0;
> >>+}
> >>+
> >>+static int rockchip_thermal_initialize(struct rockchip_thermal_data *data)
> >>+{
> >>+	const struct rockchip_tsadc_platform_data *p_tsadc_data = data->pdata;
> >>+
> >>+	if (p_tsadc_data->initialize)
> >>+		p_tsadc_data->initialize(data->regs, data->temp_force_shut);
> >>+	rockchip_set_alarm_temp(data, data->temp_passive);
> >>+	return 0;
> >>+}
> >>+
> >>+static void rockchip_thermal_control(struct rockchip_thermal_data *data,
> >>+				     bool on)
> >>+{
> >>+	const struct rockchip_tsadc_platform_data *p_tsadc_data = data->pdata;
> >>+
> >>+	if (p_tsadc_data->control)
> >>+		p_tsadc_data->control(data->regs, on);
> >>+
> >>+	if (on) {
> >>+		data->irq_enabled = true;
> >>+		data->mode = THERMAL_DEVICE_ENABLED;
> >>+	} else {
> >>+		data->irq_enabled = false;
> >>+		data->mode = THERMAL_DEVICE_DISABLED;
> >>+	}
> >>+}
> >>+
> >>+static int rockchip_get_mode(struct thermal_zone_device *tz,
> >>+			     enum thermal_device_mode *mode)
> >>+{
> >>+	struct rockchip_thermal_data *data = tz->devdata;
> >>+
> >>+	*mode = data->mode;
> >>+	return 0;
> >>+}
> >>+
> >>+static int rockchip_set_mode(struct thermal_zone_device *tz,
> >>+			     enum thermal_device_mode mode)
> >>+{
> >>+	struct rockchip_thermal_data *data = tz->devdata;
> >>+	const struct rockchip_tsadc_platform_data *p_tsadc_data = data->pdata;
> >>+
> >>+	if (mode == THERMAL_DEVICE_ENABLED) {
> >>+		tz->polling_delay = p_tsadc_data->polling_delay;
> >>+		tz->passive_delay = p_tsadc_data->passive_delay;
> >>+		rockchip_thermal_control(data, true);
> >>+		if (!data->irq_enabled) {
> >>+			data->irq_enabled = true;
> >>+			enable_irq(data->irq);
> >>+		}

I believe I commented on this chunk elsewhere. Given current definition of
rockchip_thermal_control() I do not think the code works they way you intended.

> >>+	} else {
> >>+		rockchip_thermal_control(data, false);
> >>+		tz->polling_delay = 0;
> >>+		tz->passive_delay = 0;
> >>+		if (data->irq_enabled) {
> >>+			disable_irq(data->irq);
> >>+			data->irq_enabled = false;
> >>+		}
> >>+	}
> >>+
> >>+	data->mode = mode;
> >>+	thermal_zone_device_update(tz);
> >>+	return 0;
> >>+}
> >>+
> >>+static int rockchip_get_trip_type(struct thermal_zone_device *tz, int trip,
> >>+				  enum thermal_trip_type *type)
> >>+{
> >>+	*type = (trip == ROCKCHIP_TRIP_PASSIVE) ? THERMAL_TRIP_PASSIVE :
> >>+		 THERMAL_TRIP_CRITICAL;
> >>+	return 0;
> >>+}
> >>+
> >>+static int rockchip_get_crit_temp(struct thermal_zone_device *tz,
> >>+				  unsigned long *temp)
> >>+{
> >>+	struct rockchip_thermal_data *data = tz->devdata;
> >>+
> >>+	*temp = data->temp_critical;
> >>+	return 0;
> >>+}
> >>+
> >>+static int rockchip_get_trip_temp(struct thermal_zone_device *tz, int trip,
> >>+				  unsigned long *temp)
> >>+{
> >>+	struct rockchip_thermal_data *data = tz->devdata;
> >>+
> >>+	*temp = (trip == ROCKCHIP_TRIP_PASSIVE) ? data->temp_passive :
> >>+		 data->temp_critical;
> >>+	return 0;
> >>+}
> >>+
> >>+static int rockchip_set_trip_temp(struct thermal_zone_device *tz, int trip,
> >>+				  unsigned long temp)
> >>+{
> >>+	struct rockchip_thermal_data *data = tz->devdata;
> >>+
> >>+	if (trip == ROCKCHIP_TRIP_CRITICAL)
> >>+		return -EPERM;
> >>+
> >>+	data->temp_passive = temp;
> >>+	rockchip_set_alarm_temp(data, temp);
> >>+	return 0;
> >>+}
> >>+
> >>+static int rockchip_bind(struct thermal_zone_device *tz,
> >>+			 struct thermal_cooling_device *cdev)
> >>+{
> >>+	int ret;
> >>+
> >>+	ret = thermal_zone_bind_cooling_device(tz, ROCKCHIP_TRIP_PASSIVE, cdev,
> >>+					       THERMAL_NO_LIMIT,
> >>+					       THERMAL_NO_LIMIT);
> >>+	if (ret) {
> >>+		dev_err(&tz->device, "binding zone %s with cdev %s failed:%d\n",
> >>+			tz->type, cdev->type, ret);
> >>+		return ret;
> >>+	}
> >>+	return 0;
> >>+}
> >>+
> >>+static int rockchip_unbind(struct thermal_zone_device *tz,
> >>+			   struct thermal_cooling_device *cdev)
> >>+{
> >>+	int ret;
> >>+
> >>+	ret = thermal_zone_unbind_cooling_device(tz,
> >>+						 ROCKCHIP_TRIP_PASSIVE, cdev);
> >>+	if (ret) {
> >>+		dev_err(&tz->device,
> >>+			"unbinding zone %s with cdev %s failed:%d\n", tz->type,
> >>+			cdev->type, ret);
> >>+		return ret;
> >>+	}
> >>+
> >>+	return 0;
> >>+}
> >>+
> >>+static struct thermal_zone_device_ops rockchip_tz_ops = {
> >>+	.bind = rockchip_bind,
> >>+	.unbind = rockchip_unbind,
> >>+	.get_temp = rockchip_get_temp,
> >>+	.get_mode = rockchip_get_mode,
> >>+	.set_mode = rockchip_set_mode,
> >>+	.get_trip_type = rockchip_get_trip_type,
> >>+	.get_trip_temp = rockchip_get_trip_temp,
> >>+	.get_crit_temp = rockchip_get_crit_temp,
> >>+	.set_trip_temp = rockchip_set_trip_temp,
> >>+};
> >>+
> >>+static irqreturn_t rockchip_thermal_alarm_irq(int irq, void *dev)
> >>+{
> >>+	struct rockchip_thermal_data *data = dev;
> >>+
> >>+	disable_irq_nosync(irq);
> >>+	data->irq_enabled = false;
> >>+
> >>+	return IRQ_WAKE_THREAD;
> >I think you want IRQF_ONESHOT instead of doing disable_irq dance (BTW I
> >also do not see you enabling it in your threaded handle so I wonder how
> >it worked for you).
> 
> Sorry, I will remove it.   Amended as follows:
> 
>     ...
>     ret = devm_request_threaded_irq(&pdev->dev, data->irq,
>                     NULL,
>                     rockchip_thermal_alarm_irq_thread,
>                     IRQF_ONESHOT,
>                     "rockchip_thermal", data);
> 
> >>+}
> >>+
> >>+static irqreturn_t rockchip_thermal_alarm_irq_thread(int irq, void *dev)
> >>+{
> >>+	struct rockchip_thermal_data *data = data;
> >>+	const struct rockchip_tsadc_platform_data *p_tsadc_data = data->pdata;
> >>+
> >>+	dev_dbg(&data->tz->device, "THERMAL ALARM: T > %lu\n",
> >>+		data->alarm_temp / 1000);
> >>+
> >>+	if (p_tsadc_data->irq_en && p_tsadc_data->irq_handle)
> >>+		p_tsadc_data->irq_handle(data->regs);
> >>+
> >>+	thermal_zone_device_update(data->tz);
> >>+
> >>+	return IRQ_HANDLED;
> >>+}
> >>+
> >>+static int rockchip_thermal_probe(struct platform_device *pdev)
> >>+{
> >>+	struct rockchip_thermal_data *data;
> >>+	const struct rockchip_tsadc_platform_data *p_tsadc_data;
> >>+	struct cpumask clip_cpus;
> >>+	struct resource *res;
> >>+	const struct of_device_id *match;
> >>+	int ret, temp;
> >>+
> >>+	data = devm_kzalloc(&pdev->dev, sizeof(struct rockchip_thermal_data),
> >>+			    GFP_KERNEL);
> >>+	if (!data)
> >>+		return -ENOMEM;
> >>+
> >>+	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, "Could not get tsadc source, %p\n",
> >>+			data->regs);
> >>+		return PTR_ERR(data->regs);
> >>+	}
> >>+
> >>+	match = of_match_node(of_rockchip_thermal_match, pdev->dev.of_node);
> >>+	if (!match)
> >>+		return -ENXIO;
> >>+	data->pdata = (const struct rockchip_tsadc_platform_data *)match->data;
> >>+	if (!data->pdata)
> >>+		return -EINVAL;
> >>+	p_tsadc_data = data->pdata;
> >>+
> >>+	data->tsadc_clk = devm_clk_get(&pdev->dev, "tsadc_clk");
> >>+	if (IS_ERR(data->tsadc_clk)) {
> >>+		dev_err(&pdev->dev, "failed to get tsadc clock\n");
> >>+		return PTR_ERR(data->tsadc_clk);
> >>+	}
> >Throw in a blank line here please.
> 
> OK.
> 
> >>+	ret = clk_prepare_enable(data->tsadc_clk);
> >>+	if (ret)
> >>+		return ret;
> >>+
> >>+	data->tsadc_pclk = devm_clk_get(&pdev->dev, "tsadc_pclk");
> >>+	if (IS_ERR(data->tsadc_pclk)) {
> >>+		dev_err(&pdev->dev, "failed to get tsadc pclk\n");
> >>+		return PTR_ERR(data->tsadc_pclk);
> >>+	}
> >And here too.
> >
> 
> OK.
> 
> >>+	ret = clk_prepare_enable(data->tsadc_pclk);
> >>+	if (ret)
> >>+		return ret;
> >>+
> >>+	platform_set_drvdata(pdev, data);
> >>+
> >>+	if (of_property_read_u32(pdev->dev.of_node, "passive-temp", &temp)) {
> >>+		dev_warn(&pdev->dev,
> >>+			 "Missing default passive temp property in the DT.\n");
> >>+		data->temp_passive = p_tsadc_data->temp_passive;
> >>+	} else {
> >>+		data->temp_passive = temp;
> >>+	}
> >>+
> >>+	if (of_property_read_u32(pdev->dev.of_node, "critical-temp", &temp)) {
> >>+		dev_warn(&pdev->dev,
> >>+			 "Missing default critical temp property in the DT.\n");
> >>+		data->temp_critical = p_tsadc_data->temp_critical;
> >>+	} else {
> >>+		data->temp_critical = temp;
> >>+	}
> >>+
> >>+	if (of_property_read_u32(pdev->dev.of_node, "force-shut-temp", &temp)) {
> >>+		dev_warn(&pdev->dev,
> >>+			 "Missing default force shut down temp property in the DT.\n");
> >>+		data->temp_force_shut = p_tsadc_data->temp_force_shut;
> >>+	} else {
> >>+		data->temp_force_shut = temp;
> >>+	}
> >>+
> >>+	cpumask_set_cpu(0, &clip_cpus);
> >>+	data->cdev = of_cpufreq_cooling_register(pdev->dev.of_node, &clip_cpus);
> >>+	if (IS_ERR(data->cdev)) {
> >>+		ret = PTR_ERR(data->cdev);
> >>+		dev_err(&pdev->dev,
> >>+			"failed to register cpufreq cooling device: %d\n", ret);
> >Don't you need to disable clocks here? Disbale operation is not devm
> >controlled as far as I know.
> Oh, you are right!
> 
> As you say, maybe I willl fix it, as the following:
> 
> clk_disable_unprepare(data->tsadc_clk);
> clk_disable_unprepare(data->tsadc_pclk);

Yo uneed to do it not only here but in other return paths as well. I'd
recommend doing the common "goto err_label;" error unwinding pattern.

> 
> >
> >>+		return ret;
> >>+	}
> >>+
> >>+	data->tz = thermal_zone_device_register("rockchip_thermal",
> >>+						ROCKCHIP_TRIP_NUM,
> >>+						0, data,
> >>+						&rockchip_tz_ops, NULL,
> >>+						p_tsadc_data->passive_delay,
> >>+						p_tsadc_data->polling_delay);
> >>+
> >>+	if (IS_ERR(data->tz)) {
> >>+		ret = PTR_ERR(data->tz);
> >>+		dev_err(&pdev->dev,
> >>+			"failed to register thermal zone device %d\n", ret);
> >>+		cpufreq_cooling_unregister(data->cdev);
> >>+		return ret;
> >>+	}
> >>+
> >>+	if (p_tsadc_data->irq_en) {
> >>+		data->irq = platform_get_irq(pdev, 0);
> >>+		if (data->irq < 0)
> >You are leaking thermal and colling device here.
> >
> 
> As follows:
> 
>     if (p_tsadc_data->irq_en) {
>         data->irq = platform_get_irq(pdev, 0);
>         if (data->irq < 0) {
>   +        thermal_zone_device_unregister(data->tz);
>   +        cpufreq_cooling_unregister(data->cdev);

And clocks... As I said, use the common kernel "goto err_out" pattern.

Thanks.

-- 
Dmitry
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