| Message ID | 20220930021054.22387-1-zhuyinbo@loongson.cn (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Daniel Lezcano |
| Headers | show |
| Series | [v7,1/2] thermal: loongson2: add thermal management support | expand |
Hi thermal maintainer Are there any other suggestions about this patch? If not, please help merge this patch to upstream. RRs Yinbo 在 2022/9/30 上午10:10, Yinbo Zhu 写道: > This patch adds the support for loongson2 thermal sensor controller, > which can support maximum 4 sensors. > > It's based on thermal of framework: > - Trip points defined in device tree. > - Cpufreq as cooling device registered in loongson2 cpufreq driver. > - Pwm fan as cooling device registered in hwmon pwm-fan driver. > > Signed-off-by: zhanghongchen <zhanghongchen@loongson.cn> > Signed-off-by: Yinbo Zhu <zhuyinbo@loongson.cn> > --- > Change in v7: > 1. Split the modification of patch 3 and merge it into this patch. > 2. Remove the unless code annotation to fix the compile warning > when compile C code with W=1. > > MAINTAINERS | 7 + > drivers/thermal/Kconfig | 10 ++ > drivers/thermal/Makefile | 1 + > drivers/thermal/loongson2_thermal.c | 264 ++++++++++++++++++++++++++++ > 4 files changed, 282 insertions(+) > create mode 100644 drivers/thermal/loongson2_thermal.c > > diff --git a/MAINTAINERS b/MAINTAINERS > index 589517372408..2efbd5b158b9 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -11899,6 +11899,13 @@ F: drivers/*/*loongarch* > F: Documentation/loongarch/ > F: Documentation/translations/zh_CN/loongarch/ > > +LOONGSON2 SOC SERIES THERMAL DRIVER > +M: zhanghongchen <zhanghongchen@loongson.cn> > +M: Yinbo Zhu <zhuyinbo@loongson.cn> > +L: linux-pm@vger.kernel.org > +S: Maintained > +F: drivers/thermal/loongson2_thermal.c > + > LSILOGIC MPT FUSION DRIVERS (FC/SAS/SPI) > M: Sathya Prakash <sathya.prakash@broadcom.com> > M: Sreekanth Reddy <sreekanth.reddy@broadcom.com> > diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig > index e052dae614eb..6b60397e96a1 100644 > --- a/drivers/thermal/Kconfig > +++ b/drivers/thermal/Kconfig > @@ -504,4 +504,14 @@ config KHADAS_MCU_FAN_THERMAL > If you say yes here you get support for the FAN controlled > by the Microcontroller found on the Khadas VIM boards. > > +config LOONGSON2_THERMAL > + tristate "Loongson2 SOC series thermal driver" > + depends on OF > + default y > + help > + Support for Thermal driver found on Loongson2 SOC series platforms. > + It supports one critical trip point and one passive trip point. The > + cpufreq and the pwm fan is used as the cooling device to throttle > + CPUs when the passive trip is crossed. > + > endif > diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile > index def8e1a0399c..e99f839126fa 100644 > --- a/drivers/thermal/Makefile > +++ b/drivers/thermal/Makefile > @@ -61,3 +61,4 @@ obj-$(CONFIG_UNIPHIER_THERMAL) += uniphier_thermal.o > obj-$(CONFIG_AMLOGIC_THERMAL) += amlogic_thermal.o > obj-$(CONFIG_SPRD_THERMAL) += sprd_thermal.o > obj-$(CONFIG_KHADAS_MCU_FAN_THERMAL) += khadas_mcu_fan.o > +obj-$(CONFIG_LOONGSON2_THERMAL) += loongson2_thermal.o > diff --git a/drivers/thermal/loongson2_thermal.c b/drivers/thermal/loongson2_thermal.c > new file mode 100644 > index 000000000000..082f9dd0b2a2 > --- /dev/null > +++ b/drivers/thermal/loongson2_thermal.c > @@ -0,0 +1,264 @@ > +// SPDX-License-Identifier: GPL-2.0+ > +/* > + * Author: zhanghongchen <zhanghongchen@loongson.cn> > + * Yinbo Zhu <zhuyinbo@loongson.cn> > + * Copyright (C) 2022-2023 Loongson Technology Corporation Limited > + */ > + > +#include <linux/cpufreq.h> > +#include <linux/delay.h> > +#include <linux/interrupt.h> > +#include <linux/module.h> > +#include <linux/platform_device.h> > +#include <linux/io.h> > +#include <linux/of_device.h> > +#include <linux/thermal.h> > +#include "thermal_hwmon.h" > + > +#define LOONGSON2_SOC_MAX_SENSOR_NUM 4 > + > +#define LOONGSON2_TSENSOR_CTRL_HI 0x0 > +#define LOONGSON2_TSENSOR_CTRL_LO 0x8 > +#define LOONGSON2_TSENSOR_STATUS 0x10 > +#define LOONGSON2_TSENSOR_OUT 0x14 > + > +struct loongson2_thermal_data { > + struct thermal_zone_device *tzd; > + int irq; > + int id; > + void __iomem *regs; > + struct platform_device *pdev; > + u16 ctrl_low_val; > + u16 ctrl_hi_val; > +}; > + > +static int loongson2_thermal_set(struct loongson2_thermal_data *data, > + int low, int high, bool enable) > +{ > + u64 reg_ctrl = 0; > + int reg_off = data->id * 2; > + > + if (low > high) > + return -EINVAL; > + > + low = low < -100 ? -100 : low; > + high = high > 155 ? 155 : high; > + > + low += 100; > + high += 100; > + > + reg_ctrl |= low; > + reg_ctrl |= enable ? 0x100 : 0; > + writew(reg_ctrl, data->regs + LOONGSON2_TSENSOR_CTRL_LO + reg_off); > + > + reg_ctrl = 0; > + reg_ctrl |= high; > + reg_ctrl |= enable ? 0x100 : 0; > + writew(reg_ctrl, data->regs + LOONGSON2_TSENSOR_CTRL_HI + reg_off); > + > + return 0; > +} > + > +static int loongson2_thermal_get_temp(void *__data, int *temp) > +{ > + struct loongson2_thermal_data *data = __data; > + u32 reg_val; > + > + reg_val = readl(data->regs + LOONGSON2_TSENSOR_OUT); > + *temp = ((reg_val & 0xff) - 100) * 1000; > + > + return 0; > +} > + > +static int loongson2_thermal_get_sensor_id(void) > +{ > + int ret, id; > + struct of_phandle_args sensor_specs; > + struct device_node *np, *sensor_np; > + > + np = of_find_node_by_name(NULL, "thermal-zones"); > + if (!np) > + return -ENODEV; > + > + sensor_np = of_get_next_child(np, NULL); > + ret = of_parse_phandle_with_args(sensor_np, "thermal-sensors", > + "#thermal-sensor-cells", > + 0, &sensor_specs); > + if (ret) { > + of_node_put(np); > + of_node_put(sensor_np); > + return ret; > + } > + > + if (sensor_specs.args_count >= 1) { > + id = sensor_specs.args[0]; > + WARN(sensor_specs.args_count > 1, > + "%s: too many cells in sensor specifier %d\n", > + sensor_specs.np->name, sensor_specs.args_count); > + } else { > + id = 0; > + } > + > + of_node_put(np); > + of_node_put(sensor_np); > + > + return id; > +} > + > +static irqreturn_t loongson2_thermal_alarm_irq(int irq, void *dev) > +{ > + struct loongson2_thermal_data *data = dev; > + > + /* clear interrupt */ > + writeb(0x3, data->regs + LOONGSON2_TSENSOR_STATUS); > + > + disable_irq_nosync(irq); > + > + return IRQ_WAKE_THREAD; > +} > + > +static irqreturn_t loongson2_thermal_irq_thread(int irq, void *dev) > +{ > + struct loongson2_thermal_data *data = dev; > + > + thermal_zone_device_update(data->tzd, > + THERMAL_EVENT_UNSPECIFIED); > + enable_irq(data->irq); > + > + return IRQ_HANDLED; > +} > + > +static int loongson2_thermal_set_trips(void *data, int low, int high) > +{ > + return loongson2_thermal_set(data, low/1000, high/1000, true); > +} > + > +static const struct thermal_zone_of_device_ops loongson2_of_thermal_ops = { > + .get_temp = loongson2_thermal_get_temp, > + .set_trips = loongson2_thermal_set_trips, > +}; > + > +static int loongson2_thermal_probe(struct platform_device *pdev) > +{ > + struct device *dev = &pdev->dev; > + struct resource *res; > + struct loongson2_thermal_data *data; > + int ret; > + > + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); > + if (!data) > + return -ENOMEM; > + > + data->pdev = pdev; > + platform_set_drvdata(pdev, data); > + > + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); > + data->regs = devm_ioremap(dev, res->start, resource_size(res)); > + if (IS_ERR(data->regs)) > + return PTR_ERR(data->regs); > + > + /* get irq */ > + data->irq = platform_get_irq(pdev, 0); > + if (data->irq < 0) > + return data->irq; > + > + /* get id */ > + data->id = loongson2_thermal_get_sensor_id(); > + if (data->id > LOONGSON2_SOC_MAX_SENSOR_NUM - 1 || data->id < 0) { > + dev_err(dev, "sensor id error,must be in <0 ~ %d>\n", > + LOONGSON2_SOC_MAX_SENSOR_NUM - 1); > + return -EINVAL; > + } > + > + writeb(0xff, data->regs + LOONGSON2_TSENSOR_STATUS); > + > + loongson2_thermal_set(data, 0, 0, false); > + > + data->tzd = devm_thermal_zone_of_sensor_register(&pdev->dev, > + data->id, data, > + &loongson2_of_thermal_ops); > + if (IS_ERR(data->tzd)) { > + ret = PTR_ERR(data->tzd); > + data->tzd = NULL; > + dev_err(&pdev->dev, "failed to register %d\n", ret); > + return ret; > + } > + > + ret = devm_request_threaded_irq(dev, data->irq, > + loongson2_thermal_alarm_irq, loongson2_thermal_irq_thread, > + IRQF_ONESHOT, "loongson2_thermal", data); > + if (ret < 0) { > + dev_err(dev, "failed to request alarm irq: %d\n", ret); > + return ret; > + } > + > + /* > + * Thermal_zone doesn't enable hwmon as default, > + * enable it here > + */ > + data->tzd->tzp->no_hwmon = false; > + ret = thermal_add_hwmon_sysfs(data->tzd); > + if (ret) { > + dev_err(dev, "failed to add hwmon sysfs interface %d\n", ret); > + return ret; > + } > + > + return 0; > +} > + > +static int loongson2_thermal_remove(struct platform_device *pdev) > +{ > + struct loongson2_thermal_data *data = platform_get_drvdata(pdev); > + int reg_off = data->id * 2; > + > + /* disable interrupt */ > + writew(0, data->regs + LOONGSON2_TSENSOR_CTRL_LO + reg_off); > + writew(0, data->regs + LOONGSON2_TSENSOR_CTRL_HI + reg_off); > + > + return 0; > +} > + > +static const struct of_device_id of_loongson2_thermal_match[] = { > + { .compatible = "loongson,ls2k-thermal",}, > + { /* end */ } > +}; > +MODULE_DEVICE_TABLE(of, of_loongson2_thermal_match); > + > +static int __maybe_unused loongson2_thermal_suspend(struct device *dev) > +{ > + struct loongson2_thermal_data *data = dev_get_drvdata(dev); > + int reg_off = data->id * 2; > + > + data->ctrl_low_val = readw(data->regs + LOONGSON2_TSENSOR_CTRL_LO + reg_off); > + data->ctrl_hi_val = readw(data->regs + LOONGSON2_TSENSOR_CTRL_HI + reg_off); > + > + writew(0, data->regs + LOONGSON2_TSENSOR_CTRL_LO + reg_off); > + writew(0, data->regs + LOONGSON2_TSENSOR_CTRL_HI + reg_off); > + > + return 0; > +} > + > +static int __maybe_unused loongson2_thermal_resume(struct device *dev) > +{ > + struct loongson2_thermal_data *data = dev_get_drvdata(dev); > + int reg_off = data->id * 2; > + > + writew(data->ctrl_low_val, data->regs + LOONGSON2_TSENSOR_CTRL_LO + reg_off); > + writew(data->ctrl_hi_val, data->regs + LOONGSON2_TSENSOR_CTRL_HI + reg_off); > + > + return 0; > +} > + > +static SIMPLE_DEV_PM_OPS(loongson2_thermal_pm_ops, > + loongson2_thermal_suspend, loongson2_thermal_resume); > + > +static struct platform_driver loongson2_thermal_driver = { > + .driver = { > + .name = "loongson2_thermal", > + .pm = &loongson2_thermal_pm_ops, > + .of_match_table = of_loongson2_thermal_match, > + }, > + .probe = loongson2_thermal_probe, > + .remove = loongson2_thermal_remove, > +}; > +module_platform_driver(loongson2_thermal_driver); >
在 2022/10/14 上午11:48, Yinbo Zhu 写道: > Hi thermal maintainer > > Are there any other suggestions about this patch? If not, please help > merge this patch to upstream. > > RRs > Yinbo Any updates? > 在 2022/9/30 上午10:10, Yinbo Zhu 写道: >> This patch adds the support for loongson2 thermal sensor controller, >> which can support maximum 4 sensors. >> >> It's based on thermal of framework: >> - Trip points defined in device tree. >> - Cpufreq as cooling device registered in loongson2 cpufreq driver. >> - Pwm fan as cooling device registered in hwmon pwm-fan driver. >> >> Signed-off-by: zhanghongchen <zhanghongchen@loongson.cn> >> Signed-off-by: Yinbo Zhu <zhuyinbo@loongson.cn> >> --- >> Change in v7: >> 1. Split the modification of patch 3 and merge it into this >> patch. >> 2. Remove the unless code annotation to fix the compile warning >> when compile C code with W=1. >> >> MAINTAINERS | 7 + >> drivers/thermal/Kconfig | 10 ++ >> drivers/thermal/Makefile | 1 + >> drivers/thermal/loongson2_thermal.c | 264 ++++++++++++++++++++++++++++ >> 4 files changed, 282 insertions(+) >> create mode 100644 drivers/thermal/loongson2_thermal.c >> >> diff --git a/MAINTAINERS b/MAINTAINERS >> index 589517372408..2efbd5b158b9 100644 >> --- a/MAINTAINERS >> +++ b/MAINTAINERS >> @@ -11899,6 +11899,13 @@ F: drivers/*/*loongarch* >> F: Documentation/loongarch/ >> F: Documentation/translations/zh_CN/loongarch/ >> +LOONGSON2 SOC SERIES THERMAL DRIVER >> +M: zhanghongchen <zhanghongchen@loongson.cn> >> +M: Yinbo Zhu <zhuyinbo@loongson.cn> >> +L: linux-pm@vger.kernel.org >> +S: Maintained >> +F: drivers/thermal/loongson2_thermal.c >> + >> LSILOGIC MPT FUSION DRIVERS (FC/SAS/SPI) >> M: Sathya Prakash <sathya.prakash@broadcom.com> >> M: Sreekanth Reddy <sreekanth.reddy@broadcom.com> >> diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig >> index e052dae614eb..6b60397e96a1 100644 >> --- a/drivers/thermal/Kconfig >> +++ b/drivers/thermal/Kconfig >> @@ -504,4 +504,14 @@ config KHADAS_MCU_FAN_THERMAL >> If you say yes here you get support for the FAN controlled >> by the Microcontroller found on the Khadas VIM boards. >> +config LOONGSON2_THERMAL >> + tristate "Loongson2 SOC series thermal driver" >> + depends on OF >> + default y >> + help >> + Support for Thermal driver found on Loongson2 SOC series >> platforms. >> + It supports one critical trip point and one passive trip point. >> The >> + cpufreq and the pwm fan is used as the cooling device to throttle >> + CPUs when the passive trip is crossed. >> + >> endif >> diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile >> index def8e1a0399c..e99f839126fa 100644 >> --- a/drivers/thermal/Makefile >> +++ b/drivers/thermal/Makefile >> @@ -61,3 +61,4 @@ obj-$(CONFIG_UNIPHIER_THERMAL) += uniphier_thermal.o >> obj-$(CONFIG_AMLOGIC_THERMAL) += amlogic_thermal.o >> obj-$(CONFIG_SPRD_THERMAL) += sprd_thermal.o >> obj-$(CONFIG_KHADAS_MCU_FAN_THERMAL) += khadas_mcu_fan.o >> +obj-$(CONFIG_LOONGSON2_THERMAL) += loongson2_thermal.o >> diff --git a/drivers/thermal/loongson2_thermal.c >> b/drivers/thermal/loongson2_thermal.c >> new file mode 100644 >> index 000000000000..082f9dd0b2a2 >> --- /dev/null >> +++ b/drivers/thermal/loongson2_thermal.c >> @@ -0,0 +1,264 @@ >> +// SPDX-License-Identifier: GPL-2.0+ >> +/* >> + * Author: zhanghongchen <zhanghongchen@loongson.cn> >> + * Yinbo Zhu <zhuyinbo@loongson.cn> >> + * Copyright (C) 2022-2023 Loongson Technology Corporation Limited >> + */ >> + >> +#include <linux/cpufreq.h> >> +#include <linux/delay.h> >> +#include <linux/interrupt.h> >> +#include <linux/module.h> >> +#include <linux/platform_device.h> >> +#include <linux/io.h> >> +#include <linux/of_device.h> >> +#include <linux/thermal.h> >> +#include "thermal_hwmon.h" >> + >> +#define LOONGSON2_SOC_MAX_SENSOR_NUM 4 >> + >> +#define LOONGSON2_TSENSOR_CTRL_HI 0x0 >> +#define LOONGSON2_TSENSOR_CTRL_LO 0x8 >> +#define LOONGSON2_TSENSOR_STATUS 0x10 >> +#define LOONGSON2_TSENSOR_OUT 0x14 >> + >> +struct loongson2_thermal_data { >> + struct thermal_zone_device *tzd; >> + int irq; >> + int id; >> + void __iomem *regs; >> + struct platform_device *pdev; >> + u16 ctrl_low_val; >> + u16 ctrl_hi_val; >> +}; >> + >> +static int loongson2_thermal_set(struct loongson2_thermal_data *data, >> + int low, int high, bool enable) >> +{ >> + u64 reg_ctrl = 0; >> + int reg_off = data->id * 2; >> + >> + if (low > high) >> + return -EINVAL; >> + >> + low = low < -100 ? -100 : low; >> + high = high > 155 ? 155 : high; >> + >> + low += 100; >> + high += 100; >> + >> + reg_ctrl |= low; >> + reg_ctrl |= enable ? 0x100 : 0; >> + writew(reg_ctrl, data->regs + LOONGSON2_TSENSOR_CTRL_LO + reg_off); >> + >> + reg_ctrl = 0; >> + reg_ctrl |= high; >> + reg_ctrl |= enable ? 0x100 : 0; >> + writew(reg_ctrl, data->regs + LOONGSON2_TSENSOR_CTRL_HI + reg_off); >> + >> + return 0; >> +} >> + >> +static int loongson2_thermal_get_temp(void *__data, int *temp) >> +{ >> + struct loongson2_thermal_data *data = __data; >> + u32 reg_val; >> + >> + reg_val = readl(data->regs + LOONGSON2_TSENSOR_OUT); >> + *temp = ((reg_val & 0xff) - 100) * 1000; >> + >> + return 0; >> +} >> + >> +static int loongson2_thermal_get_sensor_id(void) >> +{ >> + int ret, id; >> + struct of_phandle_args sensor_specs; >> + struct device_node *np, *sensor_np; >> + >> + np = of_find_node_by_name(NULL, "thermal-zones"); >> + if (!np) >> + return -ENODEV; >> + >> + sensor_np = of_get_next_child(np, NULL); >> + ret = of_parse_phandle_with_args(sensor_np, "thermal-sensors", >> + "#thermal-sensor-cells", >> + 0, &sensor_specs); >> + if (ret) { >> + of_node_put(np); >> + of_node_put(sensor_np); >> + return ret; >> + } >> + >> + if (sensor_specs.args_count >= 1) { >> + id = sensor_specs.args[0]; >> + WARN(sensor_specs.args_count > 1, >> + "%s: too many cells in sensor specifier %d\n", >> + sensor_specs.np->name, sensor_specs.args_count); >> + } else { >> + id = 0; >> + } >> + >> + of_node_put(np); >> + of_node_put(sensor_np); >> + >> + return id; >> +} >> + >> +static irqreturn_t loongson2_thermal_alarm_irq(int irq, void *dev) >> +{ >> + struct loongson2_thermal_data *data = dev; >> + >> + /* clear interrupt */ >> + writeb(0x3, data->regs + LOONGSON2_TSENSOR_STATUS); >> + >> + disable_irq_nosync(irq); >> + >> + return IRQ_WAKE_THREAD; >> +} >> + >> +static irqreturn_t loongson2_thermal_irq_thread(int irq, void *dev) >> +{ >> + struct loongson2_thermal_data *data = dev; >> + >> + thermal_zone_device_update(data->tzd, >> + THERMAL_EVENT_UNSPECIFIED); >> + enable_irq(data->irq); >> + >> + return IRQ_HANDLED; >> +} >> + >> +static int loongson2_thermal_set_trips(void *data, int low, int high) >> +{ >> + return loongson2_thermal_set(data, low/1000, high/1000, true); >> +} >> + >> +static const struct thermal_zone_of_device_ops >> loongson2_of_thermal_ops = { >> + .get_temp = loongson2_thermal_get_temp, >> + .set_trips = loongson2_thermal_set_trips, >> +}; >> + >> +static int loongson2_thermal_probe(struct platform_device *pdev) >> +{ >> + struct device *dev = &pdev->dev; >> + struct resource *res; >> + struct loongson2_thermal_data *data; >> + int ret; >> + >> + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); >> + if (!data) >> + return -ENOMEM; >> + >> + data->pdev = pdev; >> + platform_set_drvdata(pdev, data); >> + >> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); >> + data->regs = devm_ioremap(dev, res->start, resource_size(res)); >> + if (IS_ERR(data->regs)) >> + return PTR_ERR(data->regs); >> + >> + /* get irq */ >> + data->irq = platform_get_irq(pdev, 0); >> + if (data->irq < 0) >> + return data->irq; >> + >> + /* get id */ >> + data->id = loongson2_thermal_get_sensor_id(); >> + if (data->id > LOONGSON2_SOC_MAX_SENSOR_NUM - 1 || data->id < 0) { >> + dev_err(dev, "sensor id error,must be in <0 ~ %d>\n", >> + LOONGSON2_SOC_MAX_SENSOR_NUM - 1); >> + return -EINVAL; >> + } >> + >> + writeb(0xff, data->regs + LOONGSON2_TSENSOR_STATUS); >> + >> + loongson2_thermal_set(data, 0, 0, false); >> + >> + data->tzd = devm_thermal_zone_of_sensor_register(&pdev->dev, >> + data->id, data, >> + &loongson2_of_thermal_ops); >> + if (IS_ERR(data->tzd)) { >> + ret = PTR_ERR(data->tzd); >> + data->tzd = NULL; >> + dev_err(&pdev->dev, "failed to register %d\n", ret); >> + return ret; >> + } >> + >> + ret = devm_request_threaded_irq(dev, data->irq, >> + loongson2_thermal_alarm_irq, loongson2_thermal_irq_thread, >> + IRQF_ONESHOT, "loongson2_thermal", data); >> + if (ret < 0) { >> + dev_err(dev, "failed to request alarm irq: %d\n", ret); >> + return ret; >> + } >> + >> + /* >> + * Thermal_zone doesn't enable hwmon as default, >> + * enable it here >> + */ >> + data->tzd->tzp->no_hwmon = false; >> + ret = thermal_add_hwmon_sysfs(data->tzd); >> + if (ret) { >> + dev_err(dev, "failed to add hwmon sysfs interface %d\n", ret); >> + return ret; >> + } >> + >> + return 0; >> +} >> + >> +static int loongson2_thermal_remove(struct platform_device *pdev) >> +{ >> + struct loongson2_thermal_data *data = platform_get_drvdata(pdev); >> + int reg_off = data->id * 2; >> + >> + /* disable interrupt */ >> + writew(0, data->regs + LOONGSON2_TSENSOR_CTRL_LO + reg_off); >> + writew(0, data->regs + LOONGSON2_TSENSOR_CTRL_HI + reg_off); >> + >> + return 0; >> +} >> + >> +static const struct of_device_id of_loongson2_thermal_match[] = { >> + { .compatible = "loongson,ls2k-thermal",}, >> + { /* end */ } >> +}; >> +MODULE_DEVICE_TABLE(of, of_loongson2_thermal_match); >> + >> +static int __maybe_unused loongson2_thermal_suspend(struct device *dev) >> +{ >> + struct loongson2_thermal_data *data = dev_get_drvdata(dev); >> + int reg_off = data->id * 2; >> + >> + data->ctrl_low_val = readw(data->regs + LOONGSON2_TSENSOR_CTRL_LO >> + reg_off); >> + data->ctrl_hi_val = readw(data->regs + LOONGSON2_TSENSOR_CTRL_HI >> + reg_off); >> + >> + writew(0, data->regs + LOONGSON2_TSENSOR_CTRL_LO + reg_off); >> + writew(0, data->regs + LOONGSON2_TSENSOR_CTRL_HI + reg_off); >> + >> + return 0; >> +} >> + >> +static int __maybe_unused loongson2_thermal_resume(struct device *dev) >> +{ >> + struct loongson2_thermal_data *data = dev_get_drvdata(dev); >> + int reg_off = data->id * 2; >> + >> + writew(data->ctrl_low_val, data->regs + LOONGSON2_TSENSOR_CTRL_LO >> + reg_off); >> + writew(data->ctrl_hi_val, data->regs + LOONGSON2_TSENSOR_CTRL_HI >> + reg_off); >> + >> + return 0; >> +} >> + >> +static SIMPLE_DEV_PM_OPS(loongson2_thermal_pm_ops, >> + loongson2_thermal_suspend, loongson2_thermal_resume); >> + >> +static struct platform_driver loongson2_thermal_driver = { >> + .driver = { >> + .name = "loongson2_thermal", >> + .pm = &loongson2_thermal_pm_ops, >> + .of_match_table = of_loongson2_thermal_match, >> + }, >> + .probe = loongson2_thermal_probe, >> + .remove = loongson2_thermal_remove, >> +}; >> +module_platform_driver(loongson2_thermal_driver); >>
On 19/10/2022 10:51, Yinbo Zhu wrote: > > > 在 2022/10/14 上午11:48, Yinbo Zhu 写道: >> Hi thermal maintainer >> >> Are there any other suggestions about this patch? If not, please help >> merge this patch to upstream. >> >> RRs >> Yinbo > > Any updates? I'll review it until the end of the week
diff --git a/MAINTAINERS b/MAINTAINERS index 589517372408..2efbd5b158b9 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -11899,6 +11899,13 @@ F: drivers/*/*loongarch* F: Documentation/loongarch/ F: Documentation/translations/zh_CN/loongarch/ +LOONGSON2 SOC SERIES THERMAL DRIVER +M: zhanghongchen <zhanghongchen@loongson.cn> +M: Yinbo Zhu <zhuyinbo@loongson.cn> +L: linux-pm@vger.kernel.org +S: Maintained +F: drivers/thermal/loongson2_thermal.c + LSILOGIC MPT FUSION DRIVERS (FC/SAS/SPI) M: Sathya Prakash <sathya.prakash@broadcom.com> M: Sreekanth Reddy <sreekanth.reddy@broadcom.com> diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig index e052dae614eb..6b60397e96a1 100644 --- a/drivers/thermal/Kconfig +++ b/drivers/thermal/Kconfig @@ -504,4 +504,14 @@ config KHADAS_MCU_FAN_THERMAL If you say yes here you get support for the FAN controlled by the Microcontroller found on the Khadas VIM boards. +config LOONGSON2_THERMAL + tristate "Loongson2 SOC series thermal driver" + depends on OF + default y + help + Support for Thermal driver found on Loongson2 SOC series platforms. + It supports one critical trip point and one passive trip point. The + cpufreq and the pwm fan is used as the cooling device to throttle + CPUs when the passive trip is crossed. + endif diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile index def8e1a0399c..e99f839126fa 100644 --- a/drivers/thermal/Makefile +++ b/drivers/thermal/Makefile @@ -61,3 +61,4 @@ obj-$(CONFIG_UNIPHIER_THERMAL) += uniphier_thermal.o obj-$(CONFIG_AMLOGIC_THERMAL) += amlogic_thermal.o obj-$(CONFIG_SPRD_THERMAL) += sprd_thermal.o obj-$(CONFIG_KHADAS_MCU_FAN_THERMAL) += khadas_mcu_fan.o +obj-$(CONFIG_LOONGSON2_THERMAL) += loongson2_thermal.o diff --git a/drivers/thermal/loongson2_thermal.c b/drivers/thermal/loongson2_thermal.c new file mode 100644 index 000000000000..082f9dd0b2a2 --- /dev/null +++ b/drivers/thermal/loongson2_thermal.c @@ -0,0 +1,264 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Author: zhanghongchen <zhanghongchen@loongson.cn> + * Yinbo Zhu <zhuyinbo@loongson.cn> + * Copyright (C) 2022-2023 Loongson Technology Corporation Limited + */ + +#include <linux/cpufreq.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/io.h> +#include <linux/of_device.h> +#include <linux/thermal.h> +#include "thermal_hwmon.h" + +#define LOONGSON2_SOC_MAX_SENSOR_NUM 4 + +#define LOONGSON2_TSENSOR_CTRL_HI 0x0 +#define LOONGSON2_TSENSOR_CTRL_LO 0x8 +#define LOONGSON2_TSENSOR_STATUS 0x10 +#define LOONGSON2_TSENSOR_OUT 0x14 + +struct loongson2_thermal_data { + struct thermal_zone_device *tzd; + int irq; + int id; + void __iomem *regs; + struct platform_device *pdev; + u16 ctrl_low_val; + u16 ctrl_hi_val; +}; + +static int loongson2_thermal_set(struct loongson2_thermal_data *data, + int low, int high, bool enable) +{ + u64 reg_ctrl = 0; + int reg_off = data->id * 2; + + if (low > high) + return -EINVAL; + + low = low < -100 ? -100 : low; + high = high > 155 ? 155 : high; + + low += 100; + high += 100; + + reg_ctrl |= low; + reg_ctrl |= enable ? 0x100 : 0; + writew(reg_ctrl, data->regs + LOONGSON2_TSENSOR_CTRL_LO + reg_off); + + reg_ctrl = 0; + reg_ctrl |= high; + reg_ctrl |= enable ? 0x100 : 0; + writew(reg_ctrl, data->regs + LOONGSON2_TSENSOR_CTRL_HI + reg_off); + + return 0; +} + +static int loongson2_thermal_get_temp(void *__data, int *temp) +{ + struct loongson2_thermal_data *data = __data; + u32 reg_val; + + reg_val = readl(data->regs + LOONGSON2_TSENSOR_OUT); + *temp = ((reg_val & 0xff) - 100) * 1000; + + return 0; +} + +static int loongson2_thermal_get_sensor_id(void) +{ + int ret, id; + struct of_phandle_args sensor_specs; + struct device_node *np, *sensor_np; + + np = of_find_node_by_name(NULL, "thermal-zones"); + if (!np) + return -ENODEV; + + sensor_np = of_get_next_child(np, NULL); + ret = of_parse_phandle_with_args(sensor_np, "thermal-sensors", + "#thermal-sensor-cells", + 0, &sensor_specs); + if (ret) { + of_node_put(np); + of_node_put(sensor_np); + return ret; + } + + if (sensor_specs.args_count >= 1) { + id = sensor_specs.args[0]; + WARN(sensor_specs.args_count > 1, + "%s: too many cells in sensor specifier %d\n", + sensor_specs.np->name, sensor_specs.args_count); + } else { + id = 0; + } + + of_node_put(np); + of_node_put(sensor_np); + + return id; +} + +static irqreturn_t loongson2_thermal_alarm_irq(int irq, void *dev) +{ + struct loongson2_thermal_data *data = dev; + + /* clear interrupt */ + writeb(0x3, data->regs + LOONGSON2_TSENSOR_STATUS); + + disable_irq_nosync(irq); + + return IRQ_WAKE_THREAD; +} + +static irqreturn_t loongson2_thermal_irq_thread(int irq, void *dev) +{ + struct loongson2_thermal_data *data = dev; + + thermal_zone_device_update(data->tzd, + THERMAL_EVENT_UNSPECIFIED); + enable_irq(data->irq); + + return IRQ_HANDLED; +} + +static int loongson2_thermal_set_trips(void *data, int low, int high) +{ + return loongson2_thermal_set(data, low/1000, high/1000, true); +} + +static const struct thermal_zone_of_device_ops loongson2_of_thermal_ops = { + .get_temp = loongson2_thermal_get_temp, + .set_trips = loongson2_thermal_set_trips, +}; + +static int loongson2_thermal_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct resource *res; + struct loongson2_thermal_data *data; + int ret; + + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->pdev = pdev; + platform_set_drvdata(pdev, data); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + data->regs = devm_ioremap(dev, res->start, resource_size(res)); + if (IS_ERR(data->regs)) + return PTR_ERR(data->regs); + + /* get irq */ + data->irq = platform_get_irq(pdev, 0); + if (data->irq < 0) + return data->irq; + + /* get id */ + data->id = loongson2_thermal_get_sensor_id(); + if (data->id > LOONGSON2_SOC_MAX_SENSOR_NUM - 1 || data->id < 0) { + dev_err(dev, "sensor id error,must be in <0 ~ %d>\n", + LOONGSON2_SOC_MAX_SENSOR_NUM - 1); + return -EINVAL; + } + + writeb(0xff, data->regs + LOONGSON2_TSENSOR_STATUS); + + loongson2_thermal_set(data, 0, 0, false); + + data->tzd = devm_thermal_zone_of_sensor_register(&pdev->dev, + data->id, data, + &loongson2_of_thermal_ops); + if (IS_ERR(data->tzd)) { + ret = PTR_ERR(data->tzd); + data->tzd = NULL; + dev_err(&pdev->dev, "failed to register %d\n", ret); + return ret; + } + + ret = devm_request_threaded_irq(dev, data->irq, + loongson2_thermal_alarm_irq, loongson2_thermal_irq_thread, + IRQF_ONESHOT, "loongson2_thermal", data); + if (ret < 0) { + dev_err(dev, "failed to request alarm irq: %d\n", ret); + return ret; + } + + /* + * Thermal_zone doesn't enable hwmon as default, + * enable it here + */ + data->tzd->tzp->no_hwmon = false; + ret = thermal_add_hwmon_sysfs(data->tzd); + if (ret) { + dev_err(dev, "failed to add hwmon sysfs interface %d\n", ret); + return ret; + } + + return 0; +} + +static int loongson2_thermal_remove(struct platform_device *pdev) +{ + struct loongson2_thermal_data *data = platform_get_drvdata(pdev); + int reg_off = data->id * 2; + + /* disable interrupt */ + writew(0, data->regs + LOONGSON2_TSENSOR_CTRL_LO + reg_off); + writew(0, data->regs + LOONGSON2_TSENSOR_CTRL_HI + reg_off); + + return 0; +} + +static const struct of_device_id of_loongson2_thermal_match[] = { + { .compatible = "loongson,ls2k-thermal",}, + { /* end */ } +}; +MODULE_DEVICE_TABLE(of, of_loongson2_thermal_match); + +static int __maybe_unused loongson2_thermal_suspend(struct device *dev) +{ + struct loongson2_thermal_data *data = dev_get_drvdata(dev); + int reg_off = data->id * 2; + + data->ctrl_low_val = readw(data->regs + LOONGSON2_TSENSOR_CTRL_LO + reg_off); + data->ctrl_hi_val = readw(data->regs + LOONGSON2_TSENSOR_CTRL_HI + reg_off); + + writew(0, data->regs + LOONGSON2_TSENSOR_CTRL_LO + reg_off); + writew(0, data->regs + LOONGSON2_TSENSOR_CTRL_HI + reg_off); + + return 0; +} + +static int __maybe_unused loongson2_thermal_resume(struct device *dev) +{ + struct loongson2_thermal_data *data = dev_get_drvdata(dev); + int reg_off = data->id * 2; + + writew(data->ctrl_low_val, data->regs + LOONGSON2_TSENSOR_CTRL_LO + reg_off); + writew(data->ctrl_hi_val, data->regs + LOONGSON2_TSENSOR_CTRL_HI + reg_off); + + return 0; +} + +static SIMPLE_DEV_PM_OPS(loongson2_thermal_pm_ops, + loongson2_thermal_suspend, loongson2_thermal_resume); + +static struct platform_driver loongson2_thermal_driver = { + .driver = { + .name = "loongson2_thermal", + .pm = &loongson2_thermal_pm_ops, + .of_match_table = of_loongson2_thermal_match, + }, + .probe = loongson2_thermal_probe, + .remove = loongson2_thermal_remove, +}; +module_platform_driver(loongson2_thermal_driver);