| Message ID | 1427269825-11324-2-git-send-email-kong.kongxinwei@hisilicon.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
? 2015/3/25 15:50, Xinwei Kong ??: > 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 | 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. > @@ -0,0 +1,526 @@ > +/* > + * 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/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. > +/* 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); > + > +} > + > +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 + TEMP0_INT_EN); > + 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@hisilicon.com>"); > +MODULE_AUTHOR("Leo Yan <leo.yan@linaro.org>"); > +MODULE_DESCRIPTION("Hisilicon thermal driver"); > +MODULE_LICENSE("GPL v2"); >
On 2015/3/26 17:14, YiPing Xu wrote: > ? 2015/3/25 15:50, Xinwei Kong ??: >> 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 | 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@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/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); >> + >> +} >> + >> +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 + TEMP0_INT_EN); >> + 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@hisilicon.com>"); >> +MODULE_AUTHOR("Leo Yan <leo.yan@linaro.org>"); >> +MODULE_DESCRIPTION("Hisilicon thermal driver"); >> +MODULE_LICENSE("GPL v2"); >> > > > > . >
? 2015/3/27 16:30, Xinwei Kong ??: > > > On 2015/3/26 17:14, YiPing Xu wrote: >> ? 2015/3/25 15:50, Xinwei Kong ??: >>> 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 | 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@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/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. >>> +} >>> + >>> +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@hisilicon.com>"); >>> +MODULE_AUTHOR("Leo Yan <leo.yan@linaro.org>"); >>> +MODULE_DESCRIPTION("Hisilicon thermal driver"); >>> +MODULE_LICENSE("GPL v2"); >>> >> >> >> >> . >> > > > . >
On 2015?03?28? 08:58, YiPing Xu wrote: > ? 2015/3/27 16:30, Xinwei Kong ??: >> >> >> On 2015/3/26 17:14, YiPing Xu wrote: >>> ? 2015/3/25 15:50, Xinwei Kong ??: >>>> 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 | 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@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/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@hisilicon.com>"); >>>> +MODULE_AUTHOR("Leo Yan <leo.yan@linaro.org>"); >>>> +MODULE_DESCRIPTION("Hisilicon thermal driver"); >>>> +MODULE_LICENSE("GPL v2"); >>>> >>> >>> >>> >>> . >>> >> >> >> . >> > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-pm" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html
On 2015?03?28? 08:58, YiPing Xu wrote: > ? 2015/3/27 16:30, Xinwei Kong ??: >> >> >> On 2015/3/26 17:14, YiPing Xu wrote: >>> ? 2015/3/25 15:50, Xinwei Kong ??: >>>> 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 | 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@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/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@hisilicon.com>"); >>>> +MODULE_AUTHOR("Leo Yan <leo.yan@linaro.org>"); >>>> +MODULE_DESCRIPTION("Hisilicon thermal driver"); >>>> +MODULE_LICENSE("GPL v2"); >>>> >>> >>> >>> >>> . >>> >> >> >> . >> > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-pm" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html
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 @@ -0,0 +1,526 @@ +/* + * 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/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); + +/* 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); + +} + +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 + TEMP0_INT_EN); + 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@hisilicon.com>"); +MODULE_AUTHOR("Leo Yan <leo.yan@linaro.org>"); +MODULE_DESCRIPTION("Hisilicon thermal driver"); +MODULE_LICENSE("GPL v2");