| Message ID | 1432120598-18268-3-git-send-email-kong.kongxinwei@hisilicon.com (mailing list archive) |
|---|---|
| State | Accepted |
| Delegated to: | Eduardo Valentin |
| Headers | show |
On Wed, May 20, 2015 at 07:16:37PM +0800, Xinwei Kong wrote: > From: kongxinwei <kong.kongxinwei@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@linaro.org> > Signed-off-by: kongxinwei <kong.kongxinwei@hisilicon.com> > --- > drivers/thermal/Kconfig | 8 + > drivers/thermal/Makefile | 1 + > drivers/thermal/hisi_thermal.c | 419 +++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 428 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..356ec2c > --- /dev/null > +++ b/drivers/thermal/hisi_thermal.c > @@ -0,0 +1,419 @@ > +/* > + * Hisilicon thermal sensor driver > + * > + * Copyright (c) 2014-2015 Hisilicon Limited. > + * Copyright (c) 2014-2015 Linaro Limited. > + * > + * Xinwei Kong <kong.kongxinwei@hisilicon.com> > + * Leo Yan <leo.yan@linaro.org> > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License version 2 as > + * published by the Free Software Foundation. > + * > + * This program is distributed "as is" WITHOUT ANY WARRANTY of any > + * kind, whether express or implied; without even the implied warranty > + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + */ > + > +#include <linux/cpufreq.h> > +#include <linux/delay.h> > +#include <linux/interrupt.h> > +#include <linux/module.h> > +#include <linux/platform_device.h> > +#include <linux/io.h> > + > +#include "thermal_core.h" > + > +#define TEMP0_TH (0x4) > +#define TEMP0_RST_TH (0x8) > +#define TEMP0_CFG (0xC) > +#define TEMP0_EN (0x10) > +#define TEMP0_INT_EN (0x14) > +#define TEMP0_INT_CLR (0x18) > +#define TEMP0_RST_MSK (0x1C) > +#define TEMP0_VALUE (0x28) > + > +#define HISI_TEMP_BASE (-60) > +#define HISI_TEMP_RESET (100000) > + > +#define HISI_MAX_SENSORS 4 > + > +struct hisi_thermal_sensor { > + struct hisi_thermal_data *thermal; > + struct thermal_zone_device *tzd; > + > + long sensor_temp; > + uint32_t id; > + uint32_t thres_temp; > +}; > + > +struct hisi_thermal_data { > + struct mutex thermal_lock; /* protects register data */ > + struct platform_device *pdev; > + struct clk *clk; > + struct hisi_thermal_sensor sensors[HISI_MAX_SENSORS]; > + > + int irq, irq_bind_sensor; > + bool irq_enabled; > + > + void __iomem *regs; > +}; > + > +/* in millicelsius */ > +static inline int _step_to_temp(int step) > +{ > + /* > + * Every step equals (1 * 200) / 255 celsius, and finally > + * need convert to millicelsius. > + */ > + return (HISI_TEMP_BASE + (step * 200 / 255)) * 1000; > +} > + > +static inline long _temp_to_step(long 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) > +{ > + long val; > + > + mutex_lock(&data->thermal_lock); > + > + /* disable interrupt */ > + writel(0x0, data->regs + TEMP0_INT_EN); > + writel(0x1, data->regs + TEMP0_INT_CLR); > + > + /* disable module firstly */ > + writel(0x0, data->regs + TEMP0_EN); > + > + /* select sensor id */ > + writel((sensor->id << 12), data->regs + TEMP0_CFG); > + > + /* enable module */ > + writel(0x1, data->regs + TEMP0_EN); > + > + usleep_range(3000, 5000); > + > + val = readl(data->regs + TEMP0_VALUE); > + val = _step_to_temp(val); > + > + mutex_unlock(&data->thermal_lock); > + > + return val; > +} > + > +static void hisi_thermal_enable_bind_irq_sensor > + (struct hisi_thermal_data *data) > +{ > + struct hisi_thermal_sensor *sensor; > + > + mutex_lock(&data->thermal_lock); > + > + sensor = &data->sensors[data->irq_bind_sensor]; > + > + /* setting the hdak time */ > + writel(0x0, data->regs + TEMP0_CFG); > + > + /* disable module firstly */ > + writel(0x0, data->regs + TEMP0_RST_MSK); > + writel(0x0, data->regs + TEMP0_EN); > + > + /* select sensor id */ > + writel((sensor->id << 12), data->regs + TEMP0_CFG); > + > + /* enable for interrupt */ > + writel(_temp_to_step(sensor->thres_temp) | 0x0FFFFFF00, > + data->regs + TEMP0_TH); > + > + writel(_temp_to_step(HISI_TEMP_RESET), data->regs + TEMP0_RST_TH); > + > + /* enable module */ > + writel(0x1, data->regs + TEMP0_RST_MSK); > + writel(0x1, data->regs + TEMP0_EN); > + > + writel(0x0, data->regs + TEMP0_INT_CLR); > + writel(0x1, data->regs + TEMP0_INT_EN); > + > + usleep_range(3000, 5000); > + > + mutex_unlock(&data->thermal_lock); > +} > + > +static void hisi_thermal_disable_sensor(struct hisi_thermal_data *data) > +{ > + mutex_lock(&data->thermal_lock); > + > + /* disable sensor module */ > + writel(0x0, data->regs + TEMP0_INT_EN); > + writel(0x0, data->regs + TEMP0_RST_MSK); > + writel(0x0, data->regs + TEMP0_EN); > + > + mutex_unlock(&data->thermal_lock); > +} > + > +static int hisi_thermal_get_temp(void *_sensor, 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); > + > + sensor->sensor_temp = *temp; > + > + for (i = 0; i < HISI_MAX_SENSORS; i++) { > + if (data->sensors[i].sensor_temp >= max_temp) { > + max_temp = data->sensors[i].sensor_temp; > + sensor_id = i; > + } > + } > + > + mutex_lock(&data->thermal_lock); > + data->irq_bind_sensor = sensor_id; > + mutex_unlock(&data->thermal_lock); > + > + dev_dbg(&data->pdev->dev, "id=%d, irq=%d, temp=%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) { > + hisi_thermal_enable_bind_irq_sensor(data); > + return 0; > + } > + > + if (max_temp < sensor->thres_temp) { > + data->irq_enabled = true; > + hisi_thermal_enable_bind_irq_sensor(data); > + enable_irq(data->irq); > + } > + > + return 0; > +} > + > +static struct thermal_zone_of_device_ops hisi_of_thermal_ops = { > + .get_temp = hisi_thermal_get_temp, > +}; > + > +static irqreturn_t hisi_thermal_alarm_irq(int irq, void *dev) > +{ > + struct hisi_thermal_data *data = dev; > + > + disable_irq_nosync(irq); > + data->irq_enabled = false; > + > + return IRQ_WAKE_THREAD; > +} > + > +static irqreturn_t hisi_thermal_alarm_irq_thread(int irq, void *dev) > +{ > + struct hisi_thermal_data *data = dev; > + struct hisi_thermal_sensor *sensor; > + int i; > + > + sensor = &data->sensors[data->irq_bind_sensor]; > + > + dev_crit(&data->pdev->dev, "THERMAL ALARM: T > %d\n", > + sensor->thres_temp / 1000); I have amended your patch to lock this section too. As I mentioned in your previous version, this is a reader that needs to be serialized too. > + > + for (i = 0; i < HISI_MAX_SENSORS; i++) > + thermal_zone_device_update(data->sensors[i].tzd); > + > + return IRQ_HANDLED; > +} > + > +static int hisi_thermal_register_sensor(struct platform_device *pdev, > + struct hisi_thermal_data *data, > + struct hisi_thermal_sensor *sensor, > + int index) > +{ > + int ret, i; > + const struct thermal_trip *trip; > + > + sensor->id = index; > + sensor->thermal = data; > + > + sensor->tzd = 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; > + } > + > + trip = of_thermal_get_trip_points(sensor->tzd); > + > + for (i = 0; i < of_thermal_get_ntrips(sensor->tzd); i++) { > + if (trip[i].type == THERMAL_TRIP_PASSIVE) { > + sensor->thres_temp = trip[i].temperature; > + break; > + } > + } > + > + return 0; > +} > + > +static const struct of_device_id of_hisi_thermal_match[] = { > + { .compatible = "hisilicon,tsensor" }, > + { /* end */ } > +}; > +MODULE_DEVICE_TABLE(of, of_hisi_thermal_match); > + > +static void hisi_thermal_toggle_sensor(struct hisi_thermal_sensor *sensor, > + bool on) > +{ > + struct thermal_zone_device *tzd = sensor->tzd; > + > + tzd->ops->set_mode(tzd, > + on ? THERMAL_DEVICE_ENABLED : THERMAL_DEVICE_DISABLED); > +} > + > +static int hisi_thermal_probe(struct platform_device *pdev) > +{ > + struct hisi_thermal_data *data; > + struct resource *res; > + int i; > + int ret; > + > + data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); > + if (!data) > + return -ENOMEM; > + > + mutex_init(&data->thermal_lock); > + data->pdev = pdev; > + > + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); > + data->regs = devm_ioremap_resource(&pdev->dev, res); > + if (IS_ERR(data->regs)) { > + dev_err(&pdev->dev, "failed to get io address\n"); > + return PTR_ERR(data->regs); > + } > + > + data->irq = platform_get_irq(pdev, 0); > + if (data->irq < 0) > + return data->irq; > + > + ret = devm_request_threaded_irq(&pdev->dev, data->irq, > + hisi_thermal_alarm_irq, > + hisi_thermal_alarm_irq_thread, > + 0, "hisi_thermal", data); > + if (ret < 0) { > + dev_err(&pdev->dev, "failed to request alarm irq: %d\n", ret); > + return ret; > + } > + > + platform_set_drvdata(pdev, data); > + > + data->clk = devm_clk_get(&pdev->dev, "thermal_clk"); > + if (IS_ERR(data->clk)) { > + ret = PTR_ERR(data->clk); > + if (ret != -EPROBE_DEFER) > + dev_err(&pdev->dev, > + "failed to get thermal clk: %d\n", ret); > + return ret; > + } > + > + /* enable clock for thermal */ > + ret = clk_prepare_enable(data->clk); > + if (ret) { > + dev_err(&pdev->dev, "failed to enable thermal clk: %d\n", ret); > + return ret; > + } > + > + for (i = 0; i < HISI_MAX_SENSORS; ++i) { > + ret = hisi_thermal_register_sensor(pdev, data, > + &data->sensors[i], i); > + if (ret) { > + dev_err(&pdev->dev, > + "failed to register thermal sensor: %d\n", ret); > + goto err_get_sensor_data; > + } > + } > + > + hisi_thermal_enable_bind_irq_sensor(data); > + data->irq_enabled = true; > + > + for (i = 0; i < HISI_MAX_SENSORS; 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 < HISI_MAX_SENSORS; 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_bind_irq_sensor(data); > + > + return 0; > +} > +#endif > + > +static SIMPLE_DEV_PM_OPS(hisi_thermal_pm_ops, > + hisi_thermal_suspend, hisi_thermal_resume); > + > +static struct platform_driver hisi_thermal_driver = { > + .driver = { > + .name = "hisi_thermal", > + .owner = THIS_MODULE, > + .pm = &hisi_thermal_pm_ops, > + .of_match_table = of_hisi_thermal_match, > + }, > + .probe = hisi_thermal_probe, > + .remove = hisi_thermal_remove, > +}; > + > +module_platform_driver(hisi_thermal_driver); > + > +MODULE_AUTHOR("Xinwei Kong <kong.kongxinwei@hisilicon.com>"); > +MODULE_AUTHOR("Leo Yan <leo.yan@linaro.org>"); > +MODULE_DESCRIPTION("Hisilicon thermal driver"); > +MODULE_LICENSE("GPL v2"); > -- > 1.9.1 > >
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..356ec2c --- /dev/null +++ b/drivers/thermal/hisi_thermal.c @@ -0,0 +1,419 @@ +/* + * Hisilicon thermal sensor driver + * + * Copyright (c) 2014-2015 Hisilicon Limited. + * Copyright (c) 2014-2015 Linaro Limited. + * + * Xinwei Kong <kong.kongxinwei@hisilicon.com> + * Leo Yan <leo.yan@linaro.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether express or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/cpufreq.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/io.h> + +#include "thermal_core.h" + +#define TEMP0_TH (0x4) +#define TEMP0_RST_TH (0x8) +#define TEMP0_CFG (0xC) +#define TEMP0_EN (0x10) +#define TEMP0_INT_EN (0x14) +#define TEMP0_INT_CLR (0x18) +#define TEMP0_RST_MSK (0x1C) +#define TEMP0_VALUE (0x28) + +#define HISI_TEMP_BASE (-60) +#define HISI_TEMP_RESET (100000) + +#define HISI_MAX_SENSORS 4 + +struct hisi_thermal_sensor { + struct hisi_thermal_data *thermal; + struct thermal_zone_device *tzd; + + long sensor_temp; + uint32_t id; + uint32_t thres_temp; +}; + +struct hisi_thermal_data { + struct mutex thermal_lock; /* protects register data */ + struct platform_device *pdev; + struct clk *clk; + struct hisi_thermal_sensor sensors[HISI_MAX_SENSORS]; + + int irq, irq_bind_sensor; + bool irq_enabled; + + void __iomem *regs; +}; + +/* in millicelsius */ +static inline int _step_to_temp(int step) +{ + /* + * Every step equals (1 * 200) / 255 celsius, and finally + * need convert to millicelsius. + */ + return (HISI_TEMP_BASE + (step * 200 / 255)) * 1000; +} + +static inline long _temp_to_step(long 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) +{ + long val; + + mutex_lock(&data->thermal_lock); + + /* disable interrupt */ + writel(0x0, data->regs + TEMP0_INT_EN); + writel(0x1, data->regs + TEMP0_INT_CLR); + + /* disable module firstly */ + writel(0x0, data->regs + TEMP0_EN); + + /* select sensor id */ + writel((sensor->id << 12), data->regs + TEMP0_CFG); + + /* enable module */ + writel(0x1, data->regs + TEMP0_EN); + + usleep_range(3000, 5000); + + val = readl(data->regs + TEMP0_VALUE); + val = _step_to_temp(val); + + mutex_unlock(&data->thermal_lock); + + return val; +} + +static void hisi_thermal_enable_bind_irq_sensor + (struct hisi_thermal_data *data) +{ + struct hisi_thermal_sensor *sensor; + + mutex_lock(&data->thermal_lock); + + sensor = &data->sensors[data->irq_bind_sensor]; + + /* setting the hdak time */ + writel(0x0, data->regs + TEMP0_CFG); + + /* disable module firstly */ + writel(0x0, data->regs + TEMP0_RST_MSK); + writel(0x0, data->regs + TEMP0_EN); + + /* select sensor id */ + writel((sensor->id << 12), data->regs + TEMP0_CFG); + + /* enable for interrupt */ + writel(_temp_to_step(sensor->thres_temp) | 0x0FFFFFF00, + data->regs + TEMP0_TH); + + writel(_temp_to_step(HISI_TEMP_RESET), data->regs + TEMP0_RST_TH); + + /* enable module */ + writel(0x1, data->regs + TEMP0_RST_MSK); + writel(0x1, data->regs + TEMP0_EN); + + writel(0x0, data->regs + TEMP0_INT_CLR); + writel(0x1, data->regs + TEMP0_INT_EN); + + usleep_range(3000, 5000); + + mutex_unlock(&data->thermal_lock); +} + +static void hisi_thermal_disable_sensor(struct hisi_thermal_data *data) +{ + mutex_lock(&data->thermal_lock); + + /* disable sensor module */ + writel(0x0, data->regs + TEMP0_INT_EN); + writel(0x0, data->regs + TEMP0_RST_MSK); + writel(0x0, data->regs + TEMP0_EN); + + mutex_unlock(&data->thermal_lock); +} + +static int hisi_thermal_get_temp(void *_sensor, 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); + + sensor->sensor_temp = *temp; + + for (i = 0; i < HISI_MAX_SENSORS; i++) { + if (data->sensors[i].sensor_temp >= max_temp) { + max_temp = data->sensors[i].sensor_temp; + sensor_id = i; + } + } + + mutex_lock(&data->thermal_lock); + data->irq_bind_sensor = sensor_id; + mutex_unlock(&data->thermal_lock); + + dev_dbg(&data->pdev->dev, "id=%d, irq=%d, temp=%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) { + hisi_thermal_enable_bind_irq_sensor(data); + return 0; + } + + if (max_temp < sensor->thres_temp) { + data->irq_enabled = true; + hisi_thermal_enable_bind_irq_sensor(data); + enable_irq(data->irq); + } + + return 0; +} + +static struct thermal_zone_of_device_ops hisi_of_thermal_ops = { + .get_temp = hisi_thermal_get_temp, +}; + +static irqreturn_t hisi_thermal_alarm_irq(int irq, void *dev) +{ + struct hisi_thermal_data *data = dev; + + disable_irq_nosync(irq); + data->irq_enabled = false; + + return IRQ_WAKE_THREAD; +} + +static irqreturn_t hisi_thermal_alarm_irq_thread(int irq, void *dev) +{ + struct hisi_thermal_data *data = dev; + struct hisi_thermal_sensor *sensor; + int i; + + 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 < HISI_MAX_SENSORS; i++) + thermal_zone_device_update(data->sensors[i].tzd); + + return IRQ_HANDLED; +} + +static int hisi_thermal_register_sensor(struct platform_device *pdev, + struct hisi_thermal_data *data, + struct hisi_thermal_sensor *sensor, + int index) +{ + int ret, i; + const struct thermal_trip *trip; + + sensor->id = index; + sensor->thermal = data; + + sensor->tzd = 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; + } + + trip = of_thermal_get_trip_points(sensor->tzd); + + for (i = 0; i < of_thermal_get_ntrips(sensor->tzd); i++) { + if (trip[i].type == THERMAL_TRIP_PASSIVE) { + sensor->thres_temp = trip[i].temperature; + break; + } + } + + return 0; +} + +static const struct of_device_id of_hisi_thermal_match[] = { + { .compatible = "hisilicon,tsensor" }, + { /* end */ } +}; +MODULE_DEVICE_TABLE(of, of_hisi_thermal_match); + +static void hisi_thermal_toggle_sensor(struct hisi_thermal_sensor *sensor, + bool on) +{ + struct thermal_zone_device *tzd = sensor->tzd; + + tzd->ops->set_mode(tzd, + on ? THERMAL_DEVICE_ENABLED : THERMAL_DEVICE_DISABLED); +} + +static int hisi_thermal_probe(struct platform_device *pdev) +{ + struct hisi_thermal_data *data; + struct resource *res; + int i; + int ret; + + data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + mutex_init(&data->thermal_lock); + data->pdev = pdev; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + data->regs = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(data->regs)) { + dev_err(&pdev->dev, "failed to get io address\n"); + return PTR_ERR(data->regs); + } + + data->irq = platform_get_irq(pdev, 0); + if (data->irq < 0) + return data->irq; + + ret = devm_request_threaded_irq(&pdev->dev, data->irq, + hisi_thermal_alarm_irq, + hisi_thermal_alarm_irq_thread, + 0, "hisi_thermal", data); + if (ret < 0) { + dev_err(&pdev->dev, "failed to request alarm irq: %d\n", ret); + return ret; + } + + platform_set_drvdata(pdev, data); + + data->clk = devm_clk_get(&pdev->dev, "thermal_clk"); + if (IS_ERR(data->clk)) { + ret = PTR_ERR(data->clk); + if (ret != -EPROBE_DEFER) + dev_err(&pdev->dev, + "failed to get thermal clk: %d\n", ret); + return ret; + } + + /* enable clock for thermal */ + ret = clk_prepare_enable(data->clk); + if (ret) { + dev_err(&pdev->dev, "failed to enable thermal clk: %d\n", ret); + return ret; + } + + for (i = 0; i < HISI_MAX_SENSORS; ++i) { + ret = hisi_thermal_register_sensor(pdev, data, + &data->sensors[i], i); + if (ret) { + dev_err(&pdev->dev, + "failed to register thermal sensor: %d\n", ret); + goto err_get_sensor_data; + } + } + + hisi_thermal_enable_bind_irq_sensor(data); + data->irq_enabled = true; + + for (i = 0; i < HISI_MAX_SENSORS; 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 < HISI_MAX_SENSORS; 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_bind_irq_sensor(data); + + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(hisi_thermal_pm_ops, + hisi_thermal_suspend, hisi_thermal_resume); + +static struct platform_driver hisi_thermal_driver = { + .driver = { + .name = "hisi_thermal", + .owner = THIS_MODULE, + .pm = &hisi_thermal_pm_ops, + .of_match_table = of_hisi_thermal_match, + }, + .probe = hisi_thermal_probe, + .remove = hisi_thermal_remove, +}; + +module_platform_driver(hisi_thermal_driver); + +MODULE_AUTHOR("Xinwei Kong <kong.kongxinwei@hisilicon.com>"); +MODULE_AUTHOR("Leo Yan <leo.yan@linaro.org>"); +MODULE_DESCRIPTION("Hisilicon thermal driver"); +MODULE_LICENSE("GPL v2");