| Message ID | 20230221095355.9799-1-zhuyinbo@loongson.cn (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Daniel Lezcano |
| Headers | show |
| Series | [v13,1/2] thermal: loongson-2: add thermal management support | expand |
Friendly ping ? 在 2023/2/21 下午5:53, Yinbo Zhu 写道: > This patch adds the support for Loongson-2 thermal sensor controller, > which can support maximum 4 sensors, each sensor contains a sampling > register and a control register. The sampling register is used to obtain > the temperature in real time, the control register GATE field is used to > set the threshold of high or low temperature, when the input temperature > is higher than the high temperature threshold or lower than the low > temperature threshold, an interrupt will occur. > > Signed-off-by: zhanghongchen <zhanghongchen@loongson.cn> > Signed-off-by: Yinbo Zhu <zhuyinbo@loongson.cn> > --- > Change in v13: > 1. Add a description about that how works the sensor. > 2. Drop the COMPILE_TEST. > 3. Rework the help prograph in LOONGSON2_THERMAL Kconfig. > 4. Drop the 'tzd' 'irq' and 'pdev' element in loongson2_thermal_data. > 5. Drop the reset of variable in loongson2_thermal_set. > 6. Drop the function loongson2_thermal_get_sensor_id. > 7. Drop the function loongson2_thermal_alarm_irq. > 8. Rework the devm_thermal_of_zone_register. > 9. Pass 'tzd' instead of 'data' in devm_request_threaded_irq. > 10. Drop the "data->tzd->tzp->no_hwmon = false". > 11. Drop the loongson2_thermal_remove. > 12. Add the sensor id in the of_device_id data field. > 13. Drop the save and restore function. > Change in v12: > 1. Fixup it about min and max. > 2. Use dev_err_probe replace dev_err in devm_request_threaded_irq context. > Change in v11: > 1. Add min() and max() to replace related code in function > loongson2_thermal_set. > 2. Add dev_err_probe to to replace related code for function > return value use devm_thermal_of_zone_register. > 3. Replace thermal_add_hwmon_sysfs with devm_thermal_add_hwmon_sysfs > and use dev_warn replace dev_err in this context. > Change in v10: > 1. Add all history change log information. > Change in v9: > 1. Switch new API that use devm_thermal_of_zone_register > to replace previous interfaces. > 2. Add depend on LOONGARCH || COMPILE_TEST. > Change in v8: > 1. Replace string loongson2/Loongson2/LOONGSON2 with loongson-2/ > Loongson-2/LOONGSON-2 in Kconfig and commit log and MAINTAINERS > files. > 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. > Change in v6: > 1. NO change, but other patch in this series of patches set has > changes. > Change in v5: > 1. NO change, but other patch in this series of patches set has > changes. > Change in v4: > 1. Fixup the compatible. > Change in v3: > 1. Add a function to gain sensor id an remove dts id. > Change in v2: > 1. Remove error msg printing when addr ioremap has error. > 2. Make loongson2 thermal driver was built-in by default. > 3. Replace ls2k with loongson2. > 4. Remove CONFIG_PM_SLEEP and set pm function type was > __maybe_unused. > > MAINTAINERS | 7 ++ > drivers/thermal/Kconfig | 11 ++ > drivers/thermal/Makefile | 1 + > drivers/thermal/loongson2_thermal.c | 167 ++++++++++++++++++++++++++++ > 4 files changed, 186 insertions(+) > create mode 100644 drivers/thermal/loongson2_thermal.c > > diff --git a/MAINTAINERS b/MAINTAINERS > index 57d1d6ecb33d..54e63f51ae6d 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -12086,6 +12086,13 @@ S: Maintained > F: Documentation/devicetree/bindings/pinctrl/loongson,ls2k-pinctrl.yaml > F: drivers/pinctrl/pinctrl-loongson2.c > > +LOONGSON-2 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 eaeb2b2ee6e9..d4b5ecead80e 100644 > --- a/drivers/thermal/Kconfig > +++ b/drivers/thermal/Kconfig > @@ -508,4 +508,15 @@ 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 "Loongson-2 SoC series thermal driver" > + depends on LOONGARCH && OF > + help > + Support for Thermal driver found on Loongson-2 SoC series platforms. > + The thermal driver realizes get_temp and set_trips function, which > + are used to obtain the temperature of the current node and set the > + temperature range to trigger the interrupt. When the input temperature > + is higher than the high temperature threshold or lower than the low > + temperature threshold, the interrupt will occur. > + > endif > diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile > index b9b5dc86f5fd..bfc928f70f6d 100644 > --- a/drivers/thermal/Makefile > +++ b/drivers/thermal/Makefile > @@ -62,3 +62,4 @@ 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..7d5f32f50c0c > --- /dev/null > +++ b/drivers/thermal/loongson2_thermal.c > @@ -0,0 +1,167 @@ > +// 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 { > + int id; > + void __iomem *regs; > +}; > + > +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 = max(low, -40); > + high = min(high, 125); > + > + 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 = 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(struct thermal_zone_device *tz, int *temp) > +{ > + u32 reg_val; > + struct loongson2_thermal_data *data = tz->devdata; > + > + reg_val = readl(data->regs + LOONGSON2_TSENSOR_OUT); > + *temp = ((reg_val & 0xff) - 100) * 1000; > + > + return 0; > +} > + > +static irqreturn_t loongson2_thermal_irq_thread(int irq, void *dev) > +{ > + struct thermal_zone_device *tzd = dev; > + struct loongson2_thermal_data *data = tzd->devdata; > + > + /* clear interrupt */ > + writeb(0x3, data->regs + LOONGSON2_TSENSOR_STATUS); > + > + thermal_zone_device_update(tzd, THERMAL_EVENT_UNSPECIFIED); > + > + return IRQ_HANDLED; > +} > + > +static int loongson2_thermal_set_trips(struct thermal_zone_device *tz, int low, int high) > +{ > + struct loongson2_thermal_data *data = tz->devdata; > + > + return loongson2_thermal_set(data, low/1000, high/1000, true); > +} > + > +static const struct thermal_zone_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; > + struct thermal_zone_device *tzd; > + int ret, irq, i; > + > + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); > + if (!data) > + return -ENOMEM; > + > + data->id = (uintptr_t)device_get_match_data(dev); > + > + 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 */ > + irq = platform_get_irq(pdev, 0); > + if (irq < 0) > + return irq; > + > + 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); > + > + for (i = 0; i < LOONGSON2_SOC_MAX_SENSOR_NUM; i++) { > + tzd = devm_thermal_of_zone_register(&pdev->dev, i, > + data, &loongson2_of_thermal_ops); > + > + if (!IS_ERR(tzd)) > + break; > + > + if (PTR_ERR(tzd) != ENODEV) > + continue; > + > + return dev_err_probe(&pdev->dev, PTR_ERR(tzd), > + "failed to register"); > + } > + > + ret = devm_request_threaded_irq(dev, irq, NULL, loongson2_thermal_irq_thread, > + IRQF_ONESHOT, "loongson2_thermal", tzd); > + if (ret < 0) > + return dev_err_probe(dev, ret, "failed to request alarm irq\n"); > + > + if (devm_thermal_add_hwmon_sysfs(tzd)) > + dev_warn(&pdev->dev, "Failed to add hwmon sysfs attributes\n"); > + > + return 0; > +} > + > +static const struct of_device_id of_loongson2_thermal_match[] = { > + { .compatible = "loongson,ls2k-thermal", .data = (const void *)0}, > + { /* end */ } > +}; > +MODULE_DEVICE_TABLE(of, of_loongson2_thermal_match); > + > +static struct platform_driver loongson2_thermal_driver = { > + .driver = { > + .name = "loongson2_thermal", > + .of_match_table = of_loongson2_thermal_match, > + }, > + .probe = loongson2_thermal_probe, > +}; > +module_platform_driver(loongson2_thermal_driver); > + > +MODULE_DESCRIPTION("Loongson2 thermal driver"); > +MODULE_LICENSE("GPL");
Friendly ping ? 在 2023/2/21 下午5:53, Yinbo Zhu 写道: > This patch adds the support for Loongson-2 thermal sensor controller, > which can support maximum 4 sensors, each sensor contains a sampling > register and a control register. The sampling register is used to obtain > the temperature in real time, the control register GATE field is used to > set the threshold of high or low temperature, when the input temperature > is higher than the high temperature threshold or lower than the low > temperature threshold, an interrupt will occur. > > Signed-off-by: zhanghongchen <zhanghongchen@loongson.cn> > Signed-off-by: Yinbo Zhu <zhuyinbo@loongson.cn> > --- > Change in v13: > 1. Add a description about that how works the sensor. > 2. Drop the COMPILE_TEST. > 3. Rework the help prograph in LOONGSON2_THERMAL Kconfig. > 4. Drop the 'tzd' 'irq' and 'pdev' element in loongson2_thermal_data. > 5. Drop the reset of variable in loongson2_thermal_set. > 6. Drop the function loongson2_thermal_get_sensor_id. > 7. Drop the function loongson2_thermal_alarm_irq. > 8. Rework the devm_thermal_of_zone_register. > 9. Pass 'tzd' instead of 'data' in devm_request_threaded_irq. > 10. Drop the "data->tzd->tzp->no_hwmon = false". > 11. Drop the loongson2_thermal_remove. > 12. Add the sensor id in the of_device_id data field. > 13. Drop the save and restore function. > Change in v12: > 1. Fixup it about min and max. > 2. Use dev_err_probe replace dev_err in devm_request_threaded_irq context. > Change in v11: > 1. Add min() and max() to replace related code in function > loongson2_thermal_set. > 2. Add dev_err_probe to to replace related code for function > return value use devm_thermal_of_zone_register. > 3. Replace thermal_add_hwmon_sysfs with devm_thermal_add_hwmon_sysfs > and use dev_warn replace dev_err in this context. > Change in v10: > 1. Add all history change log information. > Change in v9: > 1. Switch new API that use devm_thermal_of_zone_register > to replace previous interfaces. > 2. Add depend on LOONGARCH || COMPILE_TEST. > Change in v8: > 1. Replace string loongson2/Loongson2/LOONGSON2 with loongson-2/ > Loongson-2/LOONGSON-2 in Kconfig and commit log and MAINTAINERS > files. > 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. > Change in v6: > 1. NO change, but other patch in this series of patches set has > changes. > Change in v5: > 1. NO change, but other patch in this series of patches set has > changes. > Change in v4: > 1. Fixup the compatible. > Change in v3: > 1. Add a function to gain sensor id an remove dts id. > Change in v2: > 1. Remove error msg printing when addr ioremap has error. > 2. Make loongson2 thermal driver was built-in by default. > 3. Replace ls2k with loongson2. > 4. Remove CONFIG_PM_SLEEP and set pm function type was > __maybe_unused. > > MAINTAINERS | 7 ++ > drivers/thermal/Kconfig | 11 ++ > drivers/thermal/Makefile | 1 + > drivers/thermal/loongson2_thermal.c | 167 ++++++++++++++++++++++++++++ > 4 files changed, 186 insertions(+) > create mode 100644 drivers/thermal/loongson2_thermal.c > > diff --git a/MAINTAINERS b/MAINTAINERS > index 57d1d6ecb33d..54e63f51ae6d 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -12086,6 +12086,13 @@ S: Maintained > F: Documentation/devicetree/bindings/pinctrl/loongson,ls2k-pinctrl.yaml > F: drivers/pinctrl/pinctrl-loongson2.c > > +LOONGSON-2 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 eaeb2b2ee6e9..d4b5ecead80e 100644 > --- a/drivers/thermal/Kconfig > +++ b/drivers/thermal/Kconfig > @@ -508,4 +508,15 @@ 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 "Loongson-2 SoC series thermal driver" > + depends on LOONGARCH && OF > + help > + Support for Thermal driver found on Loongson-2 SoC series platforms. > + The thermal driver realizes get_temp and set_trips function, which > + are used to obtain the temperature of the current node and set the > + temperature range to trigger the interrupt. When the input temperature > + is higher than the high temperature threshold or lower than the low > + temperature threshold, the interrupt will occur. > + > endif > diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile > index b9b5dc86f5fd..bfc928f70f6d 100644 > --- a/drivers/thermal/Makefile > +++ b/drivers/thermal/Makefile > @@ -62,3 +62,4 @@ 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..7d5f32f50c0c > --- /dev/null > +++ b/drivers/thermal/loongson2_thermal.c > @@ -0,0 +1,167 @@ > +// 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 { > + int id; > + void __iomem *regs; > +}; > + > +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 = max(low, -40); > + high = min(high, 125); > + > + 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 = 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(struct thermal_zone_device *tz, int *temp) > +{ > + u32 reg_val; > + struct loongson2_thermal_data *data = tz->devdata; > + > + reg_val = readl(data->regs + LOONGSON2_TSENSOR_OUT); > + *temp = ((reg_val & 0xff) - 100) * 1000; > + > + return 0; > +} > + > +static irqreturn_t loongson2_thermal_irq_thread(int irq, void *dev) > +{ > + struct thermal_zone_device *tzd = dev; > + struct loongson2_thermal_data *data = tzd->devdata; > + > + /* clear interrupt */ > + writeb(0x3, data->regs + LOONGSON2_TSENSOR_STATUS); > + > + thermal_zone_device_update(tzd, THERMAL_EVENT_UNSPECIFIED); > + > + return IRQ_HANDLED; > +} > + > +static int loongson2_thermal_set_trips(struct thermal_zone_device *tz, int low, int high) > +{ > + struct loongson2_thermal_data *data = tz->devdata; > + > + return loongson2_thermal_set(data, low/1000, high/1000, true); > +} > + > +static const struct thermal_zone_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; > + struct thermal_zone_device *tzd; > + int ret, irq, i; > + > + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); > + if (!data) > + return -ENOMEM; > + > + data->id = (uintptr_t)device_get_match_data(dev); > + > + 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 */ > + irq = platform_get_irq(pdev, 0); > + if (irq < 0) > + return irq; > + > + 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); > + > + for (i = 0; i < LOONGSON2_SOC_MAX_SENSOR_NUM; i++) { > + tzd = devm_thermal_of_zone_register(&pdev->dev, i, > + data, &loongson2_of_thermal_ops); > + > + if (!IS_ERR(tzd)) > + break; > + > + if (PTR_ERR(tzd) != ENODEV) > + continue; > + > + return dev_err_probe(&pdev->dev, PTR_ERR(tzd), > + "failed to register"); > + } > + > + ret = devm_request_threaded_irq(dev, irq, NULL, loongson2_thermal_irq_thread, > + IRQF_ONESHOT, "loongson2_thermal", tzd); > + if (ret < 0) > + return dev_err_probe(dev, ret, "failed to request alarm irq\n"); > + > + if (devm_thermal_add_hwmon_sysfs(tzd)) > + dev_warn(&pdev->dev, "Failed to add hwmon sysfs attributes\n"); > + > + return 0; > +} > + > +static const struct of_device_id of_loongson2_thermal_match[] = { > + { .compatible = "loongson,ls2k-thermal", .data = (const void *)0}, > + { /* end */ } > +}; > +MODULE_DEVICE_TABLE(of, of_loongson2_thermal_match); > + > +static struct platform_driver loongson2_thermal_driver = { > + .driver = { > + .name = "loongson2_thermal", > + .of_match_table = of_loongson2_thermal_match, > + }, > + .probe = loongson2_thermal_probe, > +}; > +module_platform_driver(loongson2_thermal_driver); > + > +MODULE_DESCRIPTION("Loongson2 thermal driver"); > +MODULE_LICENSE("GPL"); >
On 21/02/2023 10:53, Yinbo Zhu wrote: > This patch adds the support for Loongson-2 thermal sensor controller, > which can support maximum 4 sensors, each sensor contains a sampling > register and a control register. The sampling register is used to obtain > the temperature in real time, the control register GATE field is used to > set the threshold of high or low temperature, when the input temperature > is higher than the high temperature threshold or lower than the low > temperature threshold, an interrupt will occur. > > Signed-off-by: zhanghongchen <zhanghongchen@loongson.cn> > Signed-off-by: Yinbo Zhu <zhuyinbo@loongson.cn> > --- > Change in v13: > 1. Add a description about that how works the sensor. > 2. Drop the COMPILE_TEST. Why? We want to compile test. We really, really want. Best regards, Krzysztof
在 2023/4/20 下午11:54, Krzysztof Kozlowski 写道: > On 21/02/2023 10:53, Yinbo Zhu wrote: >> This patch adds the support for Loongson-2 thermal sensor controller, >> which can support maximum 4 sensors, each sensor contains a sampling >> register and a control register. The sampling register is used to obtain >> the temperature in real time, the control register GATE field is used to >> set the threshold of high or low temperature, when the input temperature >> is higher than the high temperature threshold or lower than the low >> temperature threshold, an interrupt will occur. >> >> Signed-off-by: zhanghongchen <zhanghongchen@loongson.cn> >> Signed-off-by: Yinbo Zhu <zhuyinbo@loongson.cn> >> --- >> Change in v13: >> 1. Add a description about that how works the sensor. >> 2. Drop the COMPILE_TEST. > > Why? We want to compile test. We really, really want. > I noted a commit "8df4ef3eaa62b" that accoring to Daniel's reminder. That commit "8df4ef3eaa62b" patch said "Since commit 0166dc11be91 ("of: make CONFIG_OF user selectable"), it is possible to test-build any driver which depends on OF on any architecture by explicitly selecting OF. Therefore depending on COMPILE_TEST as an alternative is no longer needed." Thanks. > Best regards, > Krzysztof >
On 21/04/2023 04:00, zhuyinbo wrote: > > > 在 2023/4/20 下午11:54, Krzysztof Kozlowski 写道: >> On 21/02/2023 10:53, Yinbo Zhu wrote: >>> This patch adds the support for Loongson-2 thermal sensor controller, >>> which can support maximum 4 sensors, each sensor contains a sampling >>> register and a control register. The sampling register is used to obtain >>> the temperature in real time, the control register GATE field is used to >>> set the threshold of high or low temperature, when the input temperature >>> is higher than the high temperature threshold or lower than the low >>> temperature threshold, an interrupt will occur. >>> >>> Signed-off-by: zhanghongchen <zhanghongchen@loongson.cn> >>> Signed-off-by: Yinbo Zhu <zhuyinbo@loongson.cn> >>> --- >>> Change in v13: >>> 1. Add a description about that how works the sensor. >>> 2. Drop the COMPILE_TEST. >> >> Why? We want to compile test. We really, really want. >> > > I noted a commit "8df4ef3eaa62b" that accoring to Daniel's reminder. The commit is for OF! That's not the case here. Your driver is limited to chosen ARCH. Best regards, Krzysztof
在 2023/4/21 下午3:17, Krzysztof Kozlowski 写道: > On 21/04/2023 04:00, zhuyinbo wrote: >> >> >> 在 2023/4/20 下午11:54, Krzysztof Kozlowski 写道: >>> On 21/02/2023 10:53, Yinbo Zhu wrote: >>>> This patch adds the support for Loongson-2 thermal sensor controller, >>>> which can support maximum 4 sensors, each sensor contains a sampling >>>> register and a control register. The sampling register is used to obtain >>>> the temperature in real time, the control register GATE field is used to >>>> set the threshold of high or low temperature, when the input temperature >>>> is higher than the high temperature threshold or lower than the low >>>> temperature threshold, an interrupt will occur. >>>> >>>> Signed-off-by: zhanghongchen <zhanghongchen@loongson.cn> >>>> Signed-off-by: Yinbo Zhu <zhuyinbo@loongson.cn> >>>> --- >>>> Change in v13: >>>> 1. Add a description about that how works the sensor. >>>> 2. Drop the COMPILE_TEST. >>> >>> Why? We want to compile test. We really, really want. >>> >> >> I noted a commit "8df4ef3eaa62b" that accoring to Daniel's reminder. > > The commit is for OF! That's not the case here. Your driver is limited > to chosen ARCH. > okay, I got it. I will add back depends on COMPILE_TEST. Thanks. > Best regards, > Krzysztof >
diff --git a/MAINTAINERS b/MAINTAINERS index 57d1d6ecb33d..54e63f51ae6d 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -12086,6 +12086,13 @@ S: Maintained F: Documentation/devicetree/bindings/pinctrl/loongson,ls2k-pinctrl.yaml F: drivers/pinctrl/pinctrl-loongson2.c +LOONGSON-2 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 eaeb2b2ee6e9..d4b5ecead80e 100644 --- a/drivers/thermal/Kconfig +++ b/drivers/thermal/Kconfig @@ -508,4 +508,15 @@ 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 "Loongson-2 SoC series thermal driver" + depends on LOONGARCH && OF + help + Support for Thermal driver found on Loongson-2 SoC series platforms. + The thermal driver realizes get_temp and set_trips function, which + are used to obtain the temperature of the current node and set the + temperature range to trigger the interrupt. When the input temperature + is higher than the high temperature threshold or lower than the low + temperature threshold, the interrupt will occur. + endif diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile index b9b5dc86f5fd..bfc928f70f6d 100644 --- a/drivers/thermal/Makefile +++ b/drivers/thermal/Makefile @@ -62,3 +62,4 @@ 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..7d5f32f50c0c --- /dev/null +++ b/drivers/thermal/loongson2_thermal.c @@ -0,0 +1,167 @@ +// 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 { + int id; + void __iomem *regs; +}; + +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 = max(low, -40); + high = min(high, 125); + + 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 = 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(struct thermal_zone_device *tz, int *temp) +{ + u32 reg_val; + struct loongson2_thermal_data *data = tz->devdata; + + reg_val = readl(data->regs + LOONGSON2_TSENSOR_OUT); + *temp = ((reg_val & 0xff) - 100) * 1000; + + return 0; +} + +static irqreturn_t loongson2_thermal_irq_thread(int irq, void *dev) +{ + struct thermal_zone_device *tzd = dev; + struct loongson2_thermal_data *data = tzd->devdata; + + /* clear interrupt */ + writeb(0x3, data->regs + LOONGSON2_TSENSOR_STATUS); + + thermal_zone_device_update(tzd, THERMAL_EVENT_UNSPECIFIED); + + return IRQ_HANDLED; +} + +static int loongson2_thermal_set_trips(struct thermal_zone_device *tz, int low, int high) +{ + struct loongson2_thermal_data *data = tz->devdata; + + return loongson2_thermal_set(data, low/1000, high/1000, true); +} + +static const struct thermal_zone_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; + struct thermal_zone_device *tzd; + int ret, irq, i; + + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->id = (uintptr_t)device_get_match_data(dev); + + 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 */ + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return irq; + + 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); + + for (i = 0; i < LOONGSON2_SOC_MAX_SENSOR_NUM; i++) { + tzd = devm_thermal_of_zone_register(&pdev->dev, i, + data, &loongson2_of_thermal_ops); + + if (!IS_ERR(tzd)) + break; + + if (PTR_ERR(tzd) != ENODEV) + continue; + + return dev_err_probe(&pdev->dev, PTR_ERR(tzd), + "failed to register"); + } + + ret = devm_request_threaded_irq(dev, irq, NULL, loongson2_thermal_irq_thread, + IRQF_ONESHOT, "loongson2_thermal", tzd); + if (ret < 0) + return dev_err_probe(dev, ret, "failed to request alarm irq\n"); + + if (devm_thermal_add_hwmon_sysfs(tzd)) + dev_warn(&pdev->dev, "Failed to add hwmon sysfs attributes\n"); + + return 0; +} + +static const struct of_device_id of_loongson2_thermal_match[] = { + { .compatible = "loongson,ls2k-thermal", .data = (const void *)0}, + { /* end */ } +}; +MODULE_DEVICE_TABLE(of, of_loongson2_thermal_match); + +static struct platform_driver loongson2_thermal_driver = { + .driver = { + .name = "loongson2_thermal", + .of_match_table = of_loongson2_thermal_match, + }, + .probe = loongson2_thermal_probe, +}; +module_platform_driver(loongson2_thermal_driver); + +MODULE_DESCRIPTION("Loongson2 thermal driver"); +MODULE_LICENSE("GPL");