[PATCH v1 1/2] thermal: hisilicon: add new hisilicon thermal sensor driver
Xinwei Kong
xweikong at hotmail.com
Sat Mar 28 09:00:38 PDT 2015
On 2015年03月28日 08:58, YiPing Xu wrote:
> 在 2015/3/27 16:30, Xinwei Kong 写道:
>>
>>
>> On 2015/3/26 17:14, YiPing Xu wrote:
>>> 在 2015/3/25 15:50, Xinwei Kong 写道:
>>>> From: kongxinwei <kong.kongxinwei at hisilicon.com>
>>>>
>>>> This patch adds the support for hisilicon thermal sensor, within
>>>> hisilicon SoC. there will register sensors for thermal framework
>>>> and use device tree to bind cooling device.
>>>>
>>>> Signed-off-by: Leo Yan <leo.yan at linaro.org>
>>>> Signed-off-by: kongxinwei <kong.kongxinwei at hisilicon.com>
>>>> ---
>>>> drivers/thermal/Kconfig | 8 +
>>>> drivers/thermal/Makefile | 1 +
>>>> drivers/thermal/hisi_thermal.c | 526
>>>> +++++++++++++++++++++++++++++++++++++++++
>>>> 3 files changed, 535 insertions(+)
>>>> create mode 100644 drivers/thermal/hisi_thermal.c
>>>>
>>>> diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig
>>>> index af40db0..81aee01 100644
>>>> --- a/drivers/thermal/Kconfig
>>>> +++ b/drivers/thermal/Kconfig
>>>> @@ -136,6 +136,14 @@ config THERMAL_EMULATION
>>>> because userland can easily disable the thermal policy by
>>>> simply
>>>> flooding this sysfs node with low temperature values.
>>>>
>>>> +config HISI_THERMAL
>>>> + tristate "Hisilicon thermal driver"
>>>> + depends on ARCH_HISI && CPU_THERMAL && OF
>>>> + help
>>>> + Enable this to plug hisilicon's thermal sensor driver into
>>>> the Linux
>>>> + thermal framework. cpufreq is used as the cooling device to
>>>> throttle
>>>> + CPUs when the passive trip is crossed.
>>>> +
>>>> config IMX_THERMAL
>>>> tristate "Temperature sensor driver for Freescale i.MX SoCs"
>>>> depends on CPU_THERMAL
>>>> diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile
>>>> index fa0dc48..08ae7ac 100644
>>>> --- a/drivers/thermal/Makefile
>>>> +++ b/drivers/thermal/Makefile
>>>> @@ -39,3 +39,4 @@ obj-$(CONFIG_TI_SOC_THERMAL) += ti-soc-thermal/
>>>> obj-$(CONFIG_INT340X_THERMAL) += int340x_thermal/
>>>> obj-$(CONFIG_ST_THERMAL) += st/
>>>> obj-$(CONFIG_TEGRA_SOCTHERM) += tegra_soctherm.o
>>>> +obj-$(CONFIG_HISI_THERMAL) += hisi_thermal.o
>>>> diff --git a/drivers/thermal/hisi_thermal.c
>>>> b/drivers/thermal/hisi_thermal.c
>>>> new file mode 100644
>>>> index 0000000..8edf83a
>>>> --- /dev/null
>>>> +++ b/drivers/thermal/hisi_thermal.c
>>>
>>> are you sure all the SOCs in hisilicon use the same thermal IP ?
>>>
>>> if not, this driver should not use the "hisi_" prefix.
>>
>> We can use this hisi thermal driver framework to satisfy diff thermal
>> IP, all of SoC will use this drvier by adding a struct about diff IP.
>> We may talk about hisi thermal diff IP how to satisfy this driver.
>>
>> Thanks
>> Xinwei
>>
>>>
>>>> @@ -0,0 +1,526 @@
>>>> +/*
>>>> + * Hisilicon thermal sensor driver
>>>> + *
>>>> + * Copyright (c) 2014-2015 Hisilicon Limited.
>>>> + * Copyright (c) 2014-2015 Linaro Limited.
>>>> + *
>>>> + * Xinwei Kong <kong.kongxinwei at hisilicon.com>
>>>> + * Leo Yan <leo.yan at 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/cpu_cooling.h>
>>>> +#include <linux/cpufreq.h>
>>>> +#include <linux/delay.h>
>>>> +#include <linux/device.h>
>>>> +#include <linux/init.h>
>>>> +#include <linux/interrupt.h>
>>>> +#include <linux/io.h>
>>>> +#include <linux/kernel.h>
>>>> +#include <linux/mfd/syscon.h>
>>>> +#include <linux/module.h>
>>>> +#include <linux/of.h>
>>>> +#include <linux/of_device.h>
>>>> +#include <linux/platform_device.h>
>>>> +#include <linux/regmap.h>
>>>> +#include <linux/slab.h>
>>>> +#include <linux/thermal.h>
>>>> +#include <linux/types.h>
>>>> +
>>>> +#include "thermal_core.h"
>>>> +
>>>> +#define TEMP0_LAG (0x0)
>>>> +#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_RAW_INT (0x20)
>>>> +#define TEMP0_MSK_INT (0x24)
>>>> +#define TEMP0_VALUE (0x28)
>>>> +
>>>> +#define HISI_TEMP_BASE (-60)
>>>> +#define HISI_TEMP_RESET (100000)
>>>> +#define HISI_TEMP_PASSIVE (85000)
>>>> +
>>>> +#define HISI_MAX_SENSORS 4
>>>> +
>>>> +struct hisi_thermal_sensor {
>>>> + struct hisi_thermal_data *thermal;
>>>> + struct thermal_zone_device *tzd;
>>>> + const struct thermal_trip *trip;
>>>> +
>>>> + uint32_t id;
>>>> + uint32_t thres_temp, reset_temp;
>>>> +};
>>>> +
>>>> +struct hisi_thermal_data {
>>>> + struct platform_device *pdev;
>>>> + struct clk *clk;
>>>> +
>>>> + int irq, irq_bind_sensor;
>>>> + bool irq_enabled;
>>>> +
>>>> + unsigned int sensors_num;
>>>> + long sensor_temp[HISI_MAX_SENSORS];
>>>> + struct hisi_thermal_sensor sensors[HISI_MAX_SENSORS];
>>>> +
>>>> + void __iomem *regs;
>>>> +};
>>>> +
>>>> +static DEFINE_SPINLOCK(thermal_lock);
>>>> +
>>>
>>> "thermal_lock" should be defined in "hisi_thermal_data" to
>>> support multi device instance.
>>>
>>
>> ok,good comments
>>
>>>> +/* 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 + (step * 200 / 255)) * 1000;
>>>> +}
>>>> +
>>>> +static inline int _temp_to_step(int temp)
>>>> +{
>>>> + return ((temp / 1000 - HISI_TEMP_BASE) * 255 / 200);
>>>> +}
>>>> +
>>>> +static long hisi_thermal_get_sensor_temp(struct hisi_thermal_data
>>>> *data,
>>>> + struct hisi_thermal_sensor *sensor)
>>>> +{
>>>> + unsigned long flags;
>>>> + int val;
>>>> +
>>>> + spin_lock_irqsave(&thermal_lock, flags);
>>>> +
>>>> + /* 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);
>>>> +
>>>> + mdelay(5);
>>>> +
>>>> + val = readl(data->regs + TEMP0_VALUE);
>>>> + val = _step_to_temp(val);
>>>> +
>>>> + /* adjust for negative value */
>>>> + val = (val < 0) ? 0 : val;
>>>> +
>>>> + spin_unlock_irqrestore(&thermal_lock, flags);
>>>> +
>>>> + return val;
>>>> +}
>>>> +
>>>> +static void hisi_thermal_bind_irq(struct hisi_thermal_data *data)
>>>> +{
>>>> + struct hisi_thermal_sensor *sensor;
>>>> + unsigned long flags;
>>>> +
>>>> + sensor = &data->sensors[data->irq_bind_sensor];
>>>> +
>>>> + spin_lock_irqsave(&thermal_lock, flags);
>>>> +
>>>> + /* 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);
>>>> +
>>>> + mdelay(5);
>>>> +
>>>> + spin_unlock_irqrestore(&thermal_lock, flags);
>>>> +
>>>> +}
>>>> +
>>>> +static void hisi_thermal_enable_sensor(struct hisi_thermal_data *data)
>>>> +{
>>>> + struct hisi_thermal_sensor *sensor;
>>>> + unsigned long flags;
>>>> +
>>>> + sensor = &data->sensors[data->irq_bind_sensor];
>>>> +
>>>> + spin_lock_irqsave(&thermal_lock, flags);
>>>> +
>>>> + /* 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);
>>>> +
>>>> + mdelay(5);
>>>> +
>>>> + spin_unlock_irqrestore(&thermal_lock, flags);
>>>> +
>
> Why take a 5ms delay in spin_lock_irq context ?
>
> Could we use mutex or other synchronization api here?
>
> For TEMP0_INT_EN, TEMP0_RST_MSK, we can use
> disable_irq(THERM_IRQ) instead.
>
If i delete 5ms this driver, don't get this temperature and this
temperature is 0 degree. I will consult hardware designer for hisilicon SOC.
Mutex lock and disable_irq ....I will try to redesign all register
function operation, let this register code concise. Thanks for your
comments.
Thanks
Xinwei
>>>> +}
>>>> +
>>>> +static void hisi_thermal_disable_sensor(struct hisi_thermal_data
>>>> *data)
>>>> +{
>>>> + unsigned long flags;
>>>> +
>>>> + spin_lock_irqsave(&thermal_lock, flags);
>>>> +
>>>> + /* disable sensor module */
>>>> + writel(0x0, data->regs + );
>>>> + writel(0x0, data->regs + TEMP0_RST_MSK);
>>>> + writel(0x0, data->regs + TEMP0_EN);
>>>> +
>>>> + spin_unlock_irqrestore(&thermal_lock, flags);
>>>> +
>>>> +}
>>>> +
>>>> +static int hisi_thermal_get_temp(void *_sensor, long *temp)
>>>> +{
>>>> + struct hisi_thermal_sensor *sensor = _sensor;
>>>> + struct hisi_thermal_data *data = sensor->thermal;
>>>> +
>>>> + int sensor_id = 0, i;
>>>> + long max_temp = 0;
>>>> +
>>>> + *temp = hisi_thermal_get_sensor_temp(data, sensor);
>>>> +
>>>> + data->sensor_temp[sensor->id] = *temp;
>>>> +
>>>> + for (i = 0; i < HISI_MAX_SENSORS; i++) {
>>>> + if (data->sensor_temp[i] >= max_temp) {
>>>> + max_temp = data->sensor_temp[i];
>>>> + sensor_id = i;
>>>> + }
>>>> + }
>>>> +
>>>> + data->irq_bind_sensor = sensor_id;
>>>> +
>>>> + dev_dbg(&data->pdev->dev, "id=%d, irq=%d, temp=%ld, 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 && max_temp < sensor->thres_temp) {
>>>> + data->irq_enabled = true;
>>>> + hisi_thermal_bind_irq(data);
>>>> + } else if (data->irq_enabled)
>>>> + hisi_thermal_bind_irq(data);
>>>> +
>>>> + 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;
>>>> + unsigned long flags;
>>>> +
>>>> + spin_lock_irqsave(&thermal_lock, flags);
>>>> +
>>>> + /* disable interrupt */
>>>> + writel(0x0, data->regs + TEMP0_INT_EN);
>>>> + writel(0x1, data->regs + TEMP0_INT_CLR);
>>>> +
>>>> + spin_unlock_irqrestore(&thermal_lock, flags);
>>>> + 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;
>>>> +
>>>> + sensor = &data->sensors[data->irq_bind_sensor];
>>>> +
>>>> + dev_crit(&data->pdev->dev, "THERMAL ALARM: T > %d\n",
>>>> + sensor->thres_temp / 1000);
>>>> +
>>>> + for (i = 0; i < data->sensors_num; i++)
>>>> + thermal_zone_device_update(data->sensors[i].tzd);
>>>> +
>>>> + return IRQ_HANDLED;
>>>> +}
>>>> +
>>>> +static int hisi_thermal_init_sensor(struct platform_device *pdev,
>>>> + struct device_node *np,
>>>> + struct hisi_thermal_data *data,
>>>> + int index)
>>>> +{
>>>> + struct hisi_thermal_sensor *sensor;
>>>> + int ret, i;
>>>> +
>>>> + sensor = &data->sensors[index];
>>>> +
>>>> + ret = of_property_read_u32(np, "hisilicon,tsensor-id",
>>>> + &sensor->id);
>>>> + if (ret) {
>>>> + dev_err(&pdev->dev, "failed to get id %d: %d\n", index, ret);
>>>> + return ret;
>>>> + }
>>>> +
>>>> + sensor->thermal = data;
>>>> + sensor->tzd = thermal_zone_of_sensor_register(&pdev->dev,
>>>> sensor->id,
>>>> + sensor, &hisi_of_thermal_ops);
>>>> + if (IS_ERR(sensor->tzd)) {
>>>> + ret = PTR_ERR(sensor->tzd);
>>>> + dev_err(&pdev->dev, "failed to register sensor id %d: %d\n",
>>>> + sensor->id, ret);
>>>> + return ret;
>>>> + }
>>>> +
>>>> + sensor->trip = of_thermal_get_trip_points(sensor->tzd);
>>>> +
>>>> + for (i = 0; i < of_thermal_get_ntrips(sensor->tzd); i++) {
>>>> + if (sensor->trip[i].type == THERMAL_TRIP_PASSIVE) {
>>>> + sensor->thres_temp = sensor->trip[i].temperature;
>>>> + break;
>>>> + }
>>>> + }
>>>> +
>>>> + return 0;
>>>> +}
>>>> +
>>>> +static int hisi_thermal_get_sensor_data(struct platform_device *pdev)
>>>> +{
>>>> + struct hisi_thermal_data *data = platform_get_drvdata(pdev);
>>>> + struct device_node *np = pdev->dev.of_node;
>>>> + struct device_node *child_np;
>>>> + int ret, i, index;
>>>> +
>>>> + /* sensor initialization */
>>>> + index = 0;
>>>> + for_each_child_of_node(np, child_np) {
>>>> +
>>>> + if (index >= HISI_MAX_SENSORS) {
>>>> + dev_err(&pdev->dev, "unsupported sensor number\n");
>>>> + ret = -EINVAL;
>>>> + goto err_init_sensors;
>>>> + }
>>>> +
>>>> + ret = hisi_thermal_init_sensor(pdev, child_np, data, index);
>>>> + if (ret)
>>>> + goto err_init_sensors;
>>>> +
>>>> + index++;
>>>> + }
>>>> +
>>>> + data->sensors_num = index;
>>>> + return 0;
>>>> +
>>>> +err_init_sensors:
>>>> + for (i = 0; i < index; i++)
>>>> + thermal_zone_of_sensor_unregister(&pdev->dev,
>>>> + data->sensors[i].tzd);
>>>> + return ret;
>>>> +}
>>>> +
>>>> +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;
>>>> +
>>>> + 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;
>>>> + }
>>>> +
>>>> + ret = hisi_thermal_get_sensor_data(pdev);
>>>> + if (ret) {
>>>> + dev_err(&pdev->dev, "failed to get sensor data\n");
>>>> + goto err_get_sensor_data;
>>>> + return ret;
>>>> + }
>>>> +
>>>> + hisi_thermal_enable_sensor(data);
>>>> + data->irq_enabled = true;
>>>> +
>>>> + for (i = 0; i < data->sensors_num; i++)
>>>> + hisi_thermal_toggle_sensor(&data->sensors[i], true);
>>>> +
>>>> + return 0;
>>>> +
>>>> +err_get_sensor_data:
>>>> + clk_disable_unprepare(data->clk);
>>>> + return ret;
>>>> +}
>>>> +
>>>> +static int hisi_thermal_remove(struct platform_device *pdev)
>>>> +{
>>>> + struct hisi_thermal_data *data = platform_get_drvdata(pdev);
>>>> + int i;
>>>> +
>>>> + for (i = 0; i < data->sensors_num; i++) {
>>>> + struct hisi_thermal_sensor *sensor = &data->sensors[i];
>>>> +
>>>> + hisi_thermal_toggle_sensor(sensor, false);
>>>> + thermal_zone_of_sensor_unregister(&pdev->dev, sensor->tzd);
>>>> + }
>>>> +
>>>> + 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_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",
>>>> + .owner = THIS_MODULE,
>>>> + .pm = &hisi_thermal_pm_ops,
>>>> + .of_match_table = of_hisi_thermal_match,
>>>> + },
>>>> + .probe = hisi_thermal_probe,
>>>> + .remove = hisi_thermal_remove,
>>>> +};
>>>> +
>>>> +static int __init hisi_thermal_init(void)
>>>> +{
>>>> + return platform_driver_register(&hisi_thermal_driver);
>>>> +}
>>>> +
>>>> +static void __exit hisi_thermal_exit(void)
>>>> +{
>>>> + platform_driver_unregister(&hisi_thermal_driver);
>>>> +}
>>>> +
>>>> +late_initcall(hisi_thermal_init);
>>>> +module_exit(hisi_thermal_exit);
>>>> +
>>>> +MODULE_AUTHOR("Xinwei Kong <kong.kongxinwei at hisilicon.com>");
>>>> +MODULE_AUTHOR("Leo Yan <leo.yan at linaro.org>");
>>>> +MODULE_DESCRIPTION("Hisilicon thermal driver");
>>>> +MODULE_LICENSE("GPL v2");
>>>>
>>>
>>>
>>>
>>> .
>>>
>>
>>
>> .
>>
>
>
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