| Message ID | 20210713060031.31568-4-quan@os.amperecomputing.com |
|---|---|
| State | New |
| Headers | show |
| Series | Add Ampere's Altra SMPro hwmon driver | expand |
On 7/12/21 11:00 PM, Quan Nguyen wrote: > This commit adds support for Ampere SMpro hwmon driver. This driver > supports accessing various CPU sensors provided by the SMpro co-processor > including temperature, power, voltages, and current. > > Signed-off-by: Quan Nguyen <quan@os.amperecomputing.com> For my reference: Reviewed-by: Guenter Roeck <linux@roeck-us.net> > --- > Changes in v5: > + Drop ManufacturerID checking when probe as it was checked during > smpro-mfd probing [Quan] > + Drop the use of register offset [Quan] > + Removed the use of compatible string as it is instantiated by > smpro-mfd driver [Quan] > + Thanks Guenter for the Reviewed-by in last version, but it was > not added because there's some changes in this version. Really > appreciate if you could help again, thank you. > > Changes in v4: > + Returned regmap_read() error code [Guenter] > > Changes in v3: > + Handled negative temperature value [Guenter] > + Returned -ENODEV if Manufacturer ID is wrong [Guenter] > + Refactored smpro_read_string() and smpro_temp_read() [Guenter] > + Removed smpro_write() function [Guenter] > + Added minor refactor changes [Quan] > > Changes in v2: > + Removed "virtual" sensors [Guenter] > + Reported SOC_TDP as "Socket TDP" using max attributes [Guenter] > + Corrected return error code when host is turn off [Guenter] > + Reported MEM HOT Threshold for all DIMMs as temp*_crit [Guenter] > + Removed license info as SPDX-License-Identifier existed [Guenter] > + Added is_visible() support [Guenter] > + Used HWMON_CHANNEL_INFO() macro and LABEL attributes [Guenter] > + Made is_valid_id() return boolean [Guenter] > + Returned -EPROBE_DEFER when smpro reg inaccessible [Guenter] > + Removed unnecessary error message when dev register fail [Guenter] > + Removed Socket TDP sensor [Quan] > + Included sensor type and channel in labels [Quan] > + Refactorized code to fix checkpatch.pl --strict complaint [Quan] > > drivers/hwmon/Kconfig | 8 + > drivers/hwmon/Makefile | 1 + > drivers/hwmon/smpro-hwmon.c | 463 ++++++++++++++++++++++++++++++++++++ > 3 files changed, 472 insertions(+) > create mode 100644 drivers/hwmon/smpro-hwmon.c > > diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig > index e3675377bc5d..903c5ef79a5a 100644 > --- a/drivers/hwmon/Kconfig > +++ b/drivers/hwmon/Kconfig > @@ -67,6 +67,14 @@ config SENSORS_ABITUGURU3 > This driver can also be built as a module. If so, the module > will be called abituguru3. > > +config SENSORS_SMPRO > + tristate "Ampere's Altra SMpro hardware monitoring driver" > + depends on MFD_SMPRO > + help > + If you say yes here you get support for the thermal, voltage, > + current and power sensors of Ampere's Altra processor family SoC > + with SMpro co-processor. > + > config SENSORS_AD7314 > tristate "Analog Devices AD7314 and compatibles" > depends on SPI > diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile > index d712c61c1f5e..9de5cd9911b0 100644 > --- a/drivers/hwmon/Makefile > +++ b/drivers/hwmon/Makefile > @@ -175,6 +175,7 @@ obj-$(CONFIG_SENSORS_SHT4x) += sht4x.o > obj-$(CONFIG_SENSORS_SHTC1) += shtc1.o > obj-$(CONFIG_SENSORS_SIS5595) += sis5595.o > obj-$(CONFIG_SENSORS_SMM665) += smm665.o > +obj-$(CONFIG_SENSORS_SMPRO) += smpro-hwmon.o > obj-$(CONFIG_SENSORS_SMSC47B397)+= smsc47b397.o > obj-$(CONFIG_SENSORS_SMSC47M1) += smsc47m1.o > obj-$(CONFIG_SENSORS_SMSC47M192)+= smsc47m192.o > diff --git a/drivers/hwmon/smpro-hwmon.c b/drivers/hwmon/smpro-hwmon.c > new file mode 100644 > index 000000000000..b01ceea33ddd > --- /dev/null > +++ b/drivers/hwmon/smpro-hwmon.c > @@ -0,0 +1,463 @@ > +// SPDX-License-Identifier: GPL-2.0+ > +/* > + * Ampere Computing SoC's SMPro Hardware Monitoring Driver > + * > + * Copyright (c) 2021, Ampere Computing LLC > + */ > +#include <linux/bitfield.h> > +#include <linux/bitops.h> > +#include <linux/hwmon.h> > +#include <linux/hwmon-sysfs.h> > +#include <linux/kernel.h> > +#include <linux/mod_devicetable.h> > +#include <linux/module.h> > +#include <linux/platform_device.h> > +#include <linux/property.h> > +#include <linux/regmap.h> > + > +/* Logical Power Sensor Registers */ > +#define SOC_TEMP 0x10 > +#define SOC_VRD_TEMP 0x11 > +#define DIMM_VRD_TEMP 0x12 > +#define CORE_VRD_TEMP 0x13 > +#define CH0_DIMM_TEMP 0x14 > +#define CH1_DIMM_TEMP 0x15 > +#define CH2_DIMM_TEMP 0x16 > +#define CH3_DIMM_TEMP 0x17 > +#define CH4_DIMM_TEMP 0x18 > +#define CH5_DIMM_TEMP 0x19 > +#define CH6_DIMM_TEMP 0x1A > +#define CH7_DIMM_TEMP 0x1B > +#define RCA_VRD_TEMP 0x1C > + > +#define CORE_VRD_PWR 0x20 > +#define SOC_PWR 0x21 > +#define DIMM_VRD1_PWR 0x22 > +#define DIMM_VRD2_PWR 0x23 > +#define CORE_VRD_PWR_MW 0x26 > +#define SOC_PWR_MW 0x27 > +#define DIMM_VRD1_PWR_MW 0x28 > +#define DIMM_VRD2_PWR_MW 0x29 > +#define RCA_VRD_PWR 0x2A > +#define RCA_VRD_PWR_MW 0x2B > + > +#define MEM_HOT_THRESHOLD 0x32 > +#define SOC_VR_HOT_THRESHOLD 0x33 > +#define CORE_VRD_VOLT 0x34 > +#define SOC_VRD_VOLT 0x35 > +#define DIMM_VRD1_VOLT 0x36 > +#define DIMM_VRD2_VOLT 0x37 > +#define RCA_VRD_VOLT 0x38 > + > +#define CORE_VRD_CURR 0x39 > +#define SOC_VRD_CURR 0x3A > +#define DIMM_VRD1_CURR 0x3B > +#define DIMM_VRD2_CURR 0x3C > +#define RCA_VRD_CURR 0x3D > + > +struct smpro_hwmon { > + struct regmap *regmap; > +}; > + > +struct smpro_sensor { > + const u8 reg; > + const u8 reg_ext; > + const char *label; > +}; > + > +static const struct smpro_sensor temperature[] = { > + { > + .reg = SOC_TEMP, > + .label = "temp1 SoC" > + }, > + { > + .reg = SOC_VRD_TEMP, > + .reg_ext = SOC_VR_HOT_THRESHOLD, > + .label = "temp2 SoC VRD" > + }, > + { > + .reg = DIMM_VRD_TEMP, > + .label = "temp3 DIMM VRD" > + }, > + { > + .reg = CORE_VRD_TEMP, > + .label = "temp4 CORE VRD" > + }, > + { > + .reg = CH0_DIMM_TEMP, > + .reg_ext = MEM_HOT_THRESHOLD, > + .label = "temp5 CH0 DIMM" > + }, > + { > + .reg = CH1_DIMM_TEMP, > + .reg_ext = MEM_HOT_THRESHOLD, > + .label = "temp6 CH1 DIMM" > + }, > + { > + .reg = CH2_DIMM_TEMP, > + .reg_ext = MEM_HOT_THRESHOLD, > + .label = "temp7 CH2 DIMM" > + }, > + { > + .reg = CH3_DIMM_TEMP, > + .reg_ext = MEM_HOT_THRESHOLD, > + .label = "temp8 CH3 DIMM" > + }, > + { > + .reg = CH4_DIMM_TEMP, > + .reg_ext = MEM_HOT_THRESHOLD, > + .label = "temp9 CH4 DIMM" > + }, > + { > + .reg = CH5_DIMM_TEMP, > + .reg_ext = MEM_HOT_THRESHOLD, > + .label = "temp10 CH5 DIMM" > + }, > + { > + .reg = CH6_DIMM_TEMP, > + .reg_ext = MEM_HOT_THRESHOLD, > + .label = "temp11 CH6 DIMM" > + }, > + { > + .reg = CH7_DIMM_TEMP, > + .reg_ext = MEM_HOT_THRESHOLD, > + .label = "temp12 CH7 DIMM" > + }, > + { > + .reg = RCA_VRD_TEMP, > + .label = "temp13 RCA VRD" > + }, > +}; > + > +static const struct smpro_sensor voltage[] = { > + { > + .reg = CORE_VRD_VOLT, > + .label = "vout0 CORE VRD" > + }, > + { > + .reg = SOC_VRD_VOLT, > + .label = "vout1 SoC VRD" > + }, > + { > + .reg = DIMM_VRD1_VOLT, > + .label = "vout2 DIMM VRD1" > + }, > + { > + .reg = DIMM_VRD2_VOLT, > + .label = "vout3 DIMM VRD2" > + }, > + { > + .reg = RCA_VRD_VOLT, > + .label = "vout4 RCA VRD" > + }, > +}; > + > +static const struct smpro_sensor curr_sensor[] = { > + { > + .reg = CORE_VRD_CURR, > + .label = "iout1 CORE VRD" > + }, > + { > + .reg = SOC_VRD_CURR, > + .label = "iout2 SoC VRD" > + }, > + { > + .reg = DIMM_VRD1_CURR, > + .label = "iout3 DIMM VRD1" > + }, > + { > + .reg = DIMM_VRD2_CURR, > + .label = "iout4 DIMM VRD2" > + }, > + { > + .reg = RCA_VRD_CURR, > + .label = "iout5 RCA VRD" > + }, > +}; > + > +static const struct smpro_sensor power[] = { > + { > + .reg = CORE_VRD_PWR, > + .reg_ext = CORE_VRD_PWR_MW, > + .label = "power1 CORE VRD" > + }, > + { > + .reg = SOC_PWR, > + .reg_ext = SOC_PWR_MW, > + .label = "power2 SoC" > + }, > + { > + .reg = DIMM_VRD1_PWR, > + .reg_ext = DIMM_VRD1_PWR_MW, > + .label = "power3 DIMM VRD1" > + }, > + { > + .reg = DIMM_VRD2_PWR, > + .reg_ext = DIMM_VRD2_PWR_MW, > + .label = "power4 DIMM VRD2" > + }, > + { > + .reg = RCA_VRD_PWR, > + .reg_ext = RCA_VRD_PWR_MW, > + .label = "power5 RCA VRD" > + }, > +}; > + > +static int smpro_read_temp(struct device *dev, u32 attr, int channel, long *val) > +{ > + struct smpro_hwmon *hwmon = dev_get_drvdata(dev); > + unsigned int value; > + int ret; > + > + switch (attr) { > + case hwmon_temp_input: > + ret = regmap_read(hwmon->regmap, temperature[channel].reg, &value); > + if (ret) > + return ret; > + break; > + case hwmon_temp_crit: > + ret = regmap_read(hwmon->regmap, temperature[channel].reg_ext, &value); > + if (ret) > + return ret; > + break; > + default: > + return -EOPNOTSUPP; > + } > + > + *val = sign_extend32(value, 8) * 1000; > + return 0; > +} > + > +static int smpro_read_in(struct device *dev, u32 attr, int channel, long *val) > +{ > + struct smpro_hwmon *hwmon = dev_get_drvdata(dev); > + unsigned int value; > + int ret; > + > + switch (attr) { > + case hwmon_in_input: > + ret = regmap_read(hwmon->regmap, voltage[channel].reg, &value); > + if (ret < 0) > + return ret; > + /* 15-bit value in 1mV */ > + *val = value & 0x7fff; > + return 0; > + default: > + return -EOPNOTSUPP; > + } > +} > + > +static int smpro_read_curr(struct device *dev, u32 attr, int channel, long *val) > +{ > + struct smpro_hwmon *hwmon = dev_get_drvdata(dev); > + unsigned int value; > + int ret; > + > + switch (attr) { > + case hwmon_curr_input: > + ret = regmap_read(hwmon->regmap, curr_sensor[channel].reg, &value); > + if (ret < 0) > + return ret; > + /* Scale reported by the hardware is 1mA */ > + *val = value & 0x7fff; > + return 0; > + default: > + return -EOPNOTSUPP; > + } > +} > + > +static int smpro_read_power(struct device *dev, u32 attr, int channel, long *val_pwr) > +{ > + struct smpro_hwmon *hwmon = dev_get_drvdata(dev); > + unsigned int val = 0, val_mw = 0; > + int ret; > + > + switch (attr) { > + case hwmon_power_input: > + ret = regmap_read(hwmon->regmap, power[channel].reg, &val); > + if (ret) > + return ret; > + > + ret = regmap_read(hwmon->regmap, power[channel].reg_ext, &val_mw); > + if (ret) > + return ret; > + > + *val_pwr = val * 1000000 + val_mw * 1000; > + return 0; > + > + default: > + return -EOPNOTSUPP; > + } > +} > + > +static int smpro_read(struct device *dev, enum hwmon_sensor_types type, > + u32 attr, int channel, long *val) > +{ > + switch (type) { > + case hwmon_temp: > + return smpro_read_temp(dev, attr, channel, val); > + case hwmon_in: > + return smpro_read_in(dev, attr, channel, val); > + case hwmon_power: > + return smpro_read_power(dev, attr, channel, val); > + case hwmon_curr: > + return smpro_read_curr(dev, attr, channel, val); > + default: > + return -EOPNOTSUPP; > + } > +} > + > +static int smpro_read_string(struct device *dev, enum hwmon_sensor_types type, > + u32 attr, int channel, const char **str) > +{ > + switch (type) { > + case hwmon_temp: > + switch (attr) { > + case hwmon_temp_label: > + *str = temperature[channel].label; > + return 0; > + default: > + break; > + } > + break; > + > + case hwmon_in: > + switch (attr) { > + case hwmon_in_label: > + *str = voltage[channel].label; > + return 0; > + default: > + break; > + } > + break; > + > + case hwmon_curr: > + switch (attr) { > + case hwmon_curr_label: > + *str = curr_sensor[channel].label; > + return 0; > + default: > + break; > + } > + break; > + > + case hwmon_power: > + switch (attr) { > + case hwmon_power_label: > + *str = power[channel].label; > + return 0; > + default: > + break; > + } > + break; > + default: > + break; > + } > + > + return -EOPNOTSUPP; > +} > + > +static umode_t smpro_is_visible(const void *data, enum hwmon_sensor_types type, > + u32 attr, int channel) > +{ > + const struct smpro_hwmon *hwmon = data; > + unsigned int value; > + int ret; > + > + switch (type) { > + case hwmon_temp: > + switch (attr) { > + case hwmon_temp_input: > + case hwmon_temp_label: > + case hwmon_temp_crit: > + ret = regmap_read(hwmon->regmap, temperature[channel].reg, &value); > + if (ret || value == 0xFFFF) > + return 0; > + break; > + } > + default: > + break; > + } > + > + return 0444; > +} > + > +static const struct hwmon_channel_info *smpro_info[] = { > + HWMON_CHANNEL_INFO(temp, > + HWMON_T_INPUT | HWMON_T_LABEL, > + HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT, > + HWMON_T_INPUT | HWMON_T_LABEL, > + HWMON_T_INPUT | HWMON_T_LABEL, > + HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT, > + HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT, > + HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT, > + HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT, > + HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT, > + HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT, > + HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT, > + HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT, > + HWMON_T_INPUT | HWMON_T_LABEL), > + HWMON_CHANNEL_INFO(in, > + HWMON_I_INPUT | HWMON_I_LABEL, > + HWMON_I_INPUT | HWMON_I_LABEL, > + HWMON_I_INPUT | HWMON_I_LABEL, > + HWMON_I_INPUT | HWMON_I_LABEL, > + HWMON_I_INPUT | HWMON_I_LABEL), > + HWMON_CHANNEL_INFO(power, > + HWMON_P_INPUT | HWMON_P_LABEL, > + HWMON_P_INPUT | HWMON_P_LABEL, > + HWMON_P_INPUT | HWMON_P_LABEL, > + HWMON_P_INPUT | HWMON_P_LABEL, > + HWMON_P_INPUT | HWMON_P_LABEL), > + HWMON_CHANNEL_INFO(curr, > + HWMON_C_INPUT | HWMON_C_LABEL, > + HWMON_C_INPUT | HWMON_C_LABEL, > + HWMON_C_INPUT | HWMON_C_LABEL, > + HWMON_C_INPUT | HWMON_C_LABEL, > + HWMON_C_INPUT | HWMON_C_LABEL), > + NULL > +}; > + > +static const struct hwmon_ops smpro_hwmon_ops = { > + .is_visible = smpro_is_visible, > + .read = smpro_read, > + .read_string = smpro_read_string, > +}; > + > +static const struct hwmon_chip_info smpro_chip_info = { > + .ops = &smpro_hwmon_ops, > + .info = smpro_info, > +}; > + > +static int smpro_hwmon_probe(struct platform_device *pdev) > +{ > + struct smpro_hwmon *hwmon; > + struct device *hwmon_dev; > + > + hwmon = devm_kzalloc(&pdev->dev, sizeof(struct smpro_hwmon), GFP_KERNEL); > + if (!hwmon) > + return -ENOMEM; > + > + hwmon->regmap = dev_get_regmap(pdev->dev.parent, NULL); > + if (!hwmon->regmap) > + return -ENODEV; > + > + hwmon_dev = devm_hwmon_device_register_with_info(&pdev->dev, "smpro_hwmon", > + hwmon, &smpro_chip_info, NULL); > + > + return PTR_ERR_OR_ZERO(hwmon_dev); > +} > + > +static struct platform_driver smpro_hwmon_driver = { > + .probe = smpro_hwmon_probe, > + .driver = { > + .name = "smpro-hwmon", > + }, > +}; > + > +module_platform_driver(smpro_hwmon_driver); > + > +MODULE_AUTHOR("Thu Nguyen <thu@os.amperecomputing.com>"); > +MODULE_AUTHOR("Quan Nguyen <quan@os.amperecomputing.com>"); > +MODULE_DESCRIPTION("Ampere Altra SMPro hwmon driver"); > +MODULE_LICENSE("GPL v2"); >
On 13/07/2021 22:28, Guenter Roeck wrote: > On 7/12/21 11:00 PM, Quan Nguyen wrote: >> This commit adds support for Ampere SMpro hwmon driver. This driver >> supports accessing various CPU sensors provided by the SMpro co-processor >> including temperature, power, voltages, and current. >> >> Signed-off-by: Quan Nguyen <quan@os.amperecomputing.com> > > For my reference: > > Reviewed-by: Guenter Roeck <linux@roeck-us.net> > Thanks for the review. - Quan >> --- >> Changes in v5: >> + Drop ManufacturerID checking when probe as it was checked during >> smpro-mfd probing [Quan] >> + Drop the use of register offset [Quan] >> + Removed the use of compatible string as it is instantiated by >> smpro-mfd driver [Quan] >> + Thanks Guenter for the Reviewed-by in last version, but it was >> not added because there's some changes in this version. Really >> appreciate if you could help again, thank you. >> >> Changes in v4: >> + Returned regmap_read() error code [Guenter] >> >> Changes in v3: >> + Handled negative temperature value [Guenter] >> + Returned -ENODEV if Manufacturer ID is wrong [Guenter] >> + Refactored smpro_read_string() and smpro_temp_read() [Guenter] >> + Removed smpro_write() function [Guenter] >> + Added minor refactor changes [Quan] >> >> Changes in v2: >> + Removed "virtual" sensors [Guenter] >> + Reported SOC_TDP as "Socket TDP" using max attributes [Guenter] >> + Corrected return error code when host is turn off [Guenter] >> + Reported MEM HOT Threshold for all DIMMs as temp*_crit [Guenter] >> + Removed license info as SPDX-License-Identifier existed [Guenter] >> + Added is_visible() support [Guenter] >> + Used HWMON_CHANNEL_INFO() macro and LABEL attributes [Guenter] >> + Made is_valid_id() return boolean [Guenter] >> + Returned -EPROBE_DEFER when smpro reg inaccessible [Guenter] >> + Removed unnecessary error message when dev register fail [Guenter] >> + Removed Socket TDP sensor [Quan] >> + Included sensor type and channel in labels [Quan] >> + Refactorized code to fix checkpatch.pl --strict complaint [Quan] >> >> drivers/hwmon/Kconfig | 8 + >> drivers/hwmon/Makefile | 1 + >> drivers/hwmon/smpro-hwmon.c | 463 ++++++++++++++++++++++++++++++++++++ >> 3 files changed, 472 insertions(+) >> create mode 100644 drivers/hwmon/smpro-hwmon.c >> >> diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig >> index e3675377bc5d..903c5ef79a5a 100644 >> --- a/drivers/hwmon/Kconfig >> +++ b/drivers/hwmon/Kconfig >> @@ -67,6 +67,14 @@ config SENSORS_ABITUGURU3 >> This driver can also be built as a module. If so, the module >> will be called abituguru3. >> +config SENSORS_SMPRO >> + tristate "Ampere's Altra SMpro hardware monitoring driver" >> + depends on MFD_SMPRO >> + help >> + If you say yes here you get support for the thermal, voltage, >> + current and power sensors of Ampere's Altra processor family SoC >> + with SMpro co-processor. >> + >> config SENSORS_AD7314 >> tristate "Analog Devices AD7314 and compatibles" >> depends on SPI >> diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile >> index d712c61c1f5e..9de5cd9911b0 100644 >> --- a/drivers/hwmon/Makefile >> +++ b/drivers/hwmon/Makefile >> @@ -175,6 +175,7 @@ obj-$(CONFIG_SENSORS_SHT4x) += sht4x.o >> obj-$(CONFIG_SENSORS_SHTC1) += shtc1.o >> obj-$(CONFIG_SENSORS_SIS5595) += sis5595.o >> obj-$(CONFIG_SENSORS_SMM665) += smm665.o >> +obj-$(CONFIG_SENSORS_SMPRO) += smpro-hwmon.o >> obj-$(CONFIG_SENSORS_SMSC47B397)+= smsc47b397.o >> obj-$(CONFIG_SENSORS_SMSC47M1) += smsc47m1.o >> obj-$(CONFIG_SENSORS_SMSC47M192)+= smsc47m192.o >> diff --git a/drivers/hwmon/smpro-hwmon.c b/drivers/hwmon/smpro-hwmon.c >> new file mode 100644 >> index 000000000000..b01ceea33ddd >> --- /dev/null >> +++ b/drivers/hwmon/smpro-hwmon.c >> @@ -0,0 +1,463 @@ >> +// SPDX-License-Identifier: GPL-2.0+ >> +/* >> + * Ampere Computing SoC's SMPro Hardware Monitoring Driver >> + * >> + * Copyright (c) 2021, Ampere Computing LLC >> + */ >> +#include <linux/bitfield.h> >> +#include <linux/bitops.h> >> +#include <linux/hwmon.h> >> +#include <linux/hwmon-sysfs.h> >> +#include <linux/kernel.h> >> +#include <linux/mod_devicetable.h> >> +#include <linux/module.h> >> +#include <linux/platform_device.h> >> +#include <linux/property.h> >> +#include <linux/regmap.h> >> + >> +/* Logical Power Sensor Registers */ >> +#define SOC_TEMP 0x10 >> +#define SOC_VRD_TEMP 0x11 >> +#define DIMM_VRD_TEMP 0x12 >> +#define CORE_VRD_TEMP 0x13 >> +#define CH0_DIMM_TEMP 0x14 >> +#define CH1_DIMM_TEMP 0x15 >> +#define CH2_DIMM_TEMP 0x16 >> +#define CH3_DIMM_TEMP 0x17 >> +#define CH4_DIMM_TEMP 0x18 >> +#define CH5_DIMM_TEMP 0x19 >> +#define CH6_DIMM_TEMP 0x1A >> +#define CH7_DIMM_TEMP 0x1B >> +#define RCA_VRD_TEMP 0x1C >> + >> +#define CORE_VRD_PWR 0x20 >> +#define SOC_PWR 0x21 >> +#define DIMM_VRD1_PWR 0x22 >> +#define DIMM_VRD2_PWR 0x23 >> +#define CORE_VRD_PWR_MW 0x26 >> +#define SOC_PWR_MW 0x27 >> +#define DIMM_VRD1_PWR_MW 0x28 >> +#define DIMM_VRD2_PWR_MW 0x29 >> +#define RCA_VRD_PWR 0x2A >> +#define RCA_VRD_PWR_MW 0x2B >> + >> +#define MEM_HOT_THRESHOLD 0x32 >> +#define SOC_VR_HOT_THRESHOLD 0x33 >> +#define CORE_VRD_VOLT 0x34 >> +#define SOC_VRD_VOLT 0x35 >> +#define DIMM_VRD1_VOLT 0x36 >> +#define DIMM_VRD2_VOLT 0x37 >> +#define RCA_VRD_VOLT 0x38 >> + >> +#define CORE_VRD_CURR 0x39 >> +#define SOC_VRD_CURR 0x3A >> +#define DIMM_VRD1_CURR 0x3B >> +#define DIMM_VRD2_CURR 0x3C >> +#define RCA_VRD_CURR 0x3D >> + >> +struct smpro_hwmon { >> + struct regmap *regmap; >> +}; >> + >> +struct smpro_sensor { >> + const u8 reg; >> + const u8 reg_ext; >> + const char *label; >> +}; >> + >> +static const struct smpro_sensor temperature[] = { >> + { >> + .reg = SOC_TEMP, >> + .label = "temp1 SoC" >> + }, >> + { >> + .reg = SOC_VRD_TEMP, >> + .reg_ext = SOC_VR_HOT_THRESHOLD, >> + .label = "temp2 SoC VRD" >> + }, >> + { >> + .reg = DIMM_VRD_TEMP, >> + .label = "temp3 DIMM VRD" >> + }, >> + { >> + .reg = CORE_VRD_TEMP, >> + .label = "temp4 CORE VRD" >> + }, >> + { >> + .reg = CH0_DIMM_TEMP, >> + .reg_ext = MEM_HOT_THRESHOLD, >> + .label = "temp5 CH0 DIMM" >> + }, >> + { >> + .reg = CH1_DIMM_TEMP, >> + .reg_ext = MEM_HOT_THRESHOLD, >> + .label = "temp6 CH1 DIMM" >> + }, >> + { >> + .reg = CH2_DIMM_TEMP, >> + .reg_ext = MEM_HOT_THRESHOLD, >> + .label = "temp7 CH2 DIMM" >> + }, >> + { >> + .reg = CH3_DIMM_TEMP, >> + .reg_ext = MEM_HOT_THRESHOLD, >> + .label = "temp8 CH3 DIMM" >> + }, >> + { >> + .reg = CH4_DIMM_TEMP, >> + .reg_ext = MEM_HOT_THRESHOLD, >> + .label = "temp9 CH4 DIMM" >> + }, >> + { >> + .reg = CH5_DIMM_TEMP, >> + .reg_ext = MEM_HOT_THRESHOLD, >> + .label = "temp10 CH5 DIMM" >> + }, >> + { >> + .reg = CH6_DIMM_TEMP, >> + .reg_ext = MEM_HOT_THRESHOLD, >> + .label = "temp11 CH6 DIMM" >> + }, >> + { >> + .reg = CH7_DIMM_TEMP, >> + .reg_ext = MEM_HOT_THRESHOLD, >> + .label = "temp12 CH7 DIMM" >> + }, >> + { >> + .reg = RCA_VRD_TEMP, >> + .label = "temp13 RCA VRD" >> + }, >> +}; >> + >> +static const struct smpro_sensor voltage[] = { >> + { >> + .reg = CORE_VRD_VOLT, >> + .label = "vout0 CORE VRD" >> + }, >> + { >> + .reg = SOC_VRD_VOLT, >> + .label = "vout1 SoC VRD" >> + }, >> + { >> + .reg = DIMM_VRD1_VOLT, >> + .label = "vout2 DIMM VRD1" >> + }, >> + { >> + .reg = DIMM_VRD2_VOLT, >> + .label = "vout3 DIMM VRD2" >> + }, >> + { >> + .reg = RCA_VRD_VOLT, >> + .label = "vout4 RCA VRD" >> + }, >> +}; >> + >> +static const struct smpro_sensor curr_sensor[] = { >> + { >> + .reg = CORE_VRD_CURR, >> + .label = "iout1 CORE VRD" >> + }, >> + { >> + .reg = SOC_VRD_CURR, >> + .label = "iout2 SoC VRD" >> + }, >> + { >> + .reg = DIMM_VRD1_CURR, >> + .label = "iout3 DIMM VRD1" >> + }, >> + { >> + .reg = DIMM_VRD2_CURR, >> + .label = "iout4 DIMM VRD2" >> + }, >> + { >> + .reg = RCA_VRD_CURR, >> + .label = "iout5 RCA VRD" >> + }, >> +}; >> + >> +static const struct smpro_sensor power[] = { >> + { >> + .reg = CORE_VRD_PWR, >> + .reg_ext = CORE_VRD_PWR_MW, >> + .label = "power1 CORE VRD" >> + }, >> + { >> + .reg = SOC_PWR, >> + .reg_ext = SOC_PWR_MW, >> + .label = "power2 SoC" >> + }, >> + { >> + .reg = DIMM_VRD1_PWR, >> + .reg_ext = DIMM_VRD1_PWR_MW, >> + .label = "power3 DIMM VRD1" >> + }, >> + { >> + .reg = DIMM_VRD2_PWR, >> + .reg_ext = DIMM_VRD2_PWR_MW, >> + .label = "power4 DIMM VRD2" >> + }, >> + { >> + .reg = RCA_VRD_PWR, >> + .reg_ext = RCA_VRD_PWR_MW, >> + .label = "power5 RCA VRD" >> + }, >> +}; >> + >> +static int smpro_read_temp(struct device *dev, u32 attr, int channel, >> long *val) >> +{ >> + struct smpro_hwmon *hwmon = dev_get_drvdata(dev); >> + unsigned int value; >> + int ret; >> + >> + switch (attr) { >> + case hwmon_temp_input: >> + ret = regmap_read(hwmon->regmap, temperature[channel].reg, >> &value); >> + if (ret) >> + return ret; >> + break; >> + case hwmon_temp_crit: >> + ret = regmap_read(hwmon->regmap, >> temperature[channel].reg_ext, &value); >> + if (ret) >> + return ret; >> + break; >> + default: >> + return -EOPNOTSUPP; >> + } >> + >> + *val = sign_extend32(value, 8) * 1000; >> + return 0; >> +} >> + >> +static int smpro_read_in(struct device *dev, u32 attr, int channel, >> long *val) >> +{ >> + struct smpro_hwmon *hwmon = dev_get_drvdata(dev); >> + unsigned int value; >> + int ret; >> + >> + switch (attr) { >> + case hwmon_in_input: >> + ret = regmap_read(hwmon->regmap, voltage[channel].reg, &value); >> + if (ret < 0) >> + return ret; >> + /* 15-bit value in 1mV */ >> + *val = value & 0x7fff; >> + return 0; >> + default: >> + return -EOPNOTSUPP; >> + } >> +} >> + >> +static int smpro_read_curr(struct device *dev, u32 attr, int channel, >> long *val) >> +{ >> + struct smpro_hwmon *hwmon = dev_get_drvdata(dev); >> + unsigned int value; >> + int ret; >> + >> + switch (attr) { >> + case hwmon_curr_input: >> + ret = regmap_read(hwmon->regmap, curr_sensor[channel].reg, >> &value); >> + if (ret < 0) >> + return ret; >> + /* Scale reported by the hardware is 1mA */ >> + *val = value & 0x7fff; >> + return 0; >> + default: >> + return -EOPNOTSUPP; >> + } >> +} >> + >> +static int smpro_read_power(struct device *dev, u32 attr, int >> channel, long *val_pwr) >> +{ >> + struct smpro_hwmon *hwmon = dev_get_drvdata(dev); >> + unsigned int val = 0, val_mw = 0; >> + int ret; >> + >> + switch (attr) { >> + case hwmon_power_input: >> + ret = regmap_read(hwmon->regmap, power[channel].reg, &val); >> + if (ret) >> + return ret; >> + >> + ret = regmap_read(hwmon->regmap, power[channel].reg_ext, >> &val_mw); >> + if (ret) >> + return ret; >> + >> + *val_pwr = val * 1000000 + val_mw * 1000; >> + return 0; >> + >> + default: >> + return -EOPNOTSUPP; >> + } >> +} >> + >> +static int smpro_read(struct device *dev, enum hwmon_sensor_types type, >> + u32 attr, int channel, long *val) >> +{ >> + switch (type) { >> + case hwmon_temp: >> + return smpro_read_temp(dev, attr, channel, val); >> + case hwmon_in: >> + return smpro_read_in(dev, attr, channel, val); >> + case hwmon_power: >> + return smpro_read_power(dev, attr, channel, val); >> + case hwmon_curr: >> + return smpro_read_curr(dev, attr, channel, val); >> + default: >> + return -EOPNOTSUPP; >> + } >> +} >> + >> +static int smpro_read_string(struct device *dev, enum >> hwmon_sensor_types type, >> + u32 attr, int channel, const char **str) >> +{ >> + switch (type) { >> + case hwmon_temp: >> + switch (attr) { >> + case hwmon_temp_label: >> + *str = temperature[channel].label; >> + return 0; >> + default: >> + break; >> + } >> + break; >> + >> + case hwmon_in: >> + switch (attr) { >> + case hwmon_in_label: >> + *str = voltage[channel].label; >> + return 0; >> + default: >> + break; >> + } >> + break; >> + >> + case hwmon_curr: >> + switch (attr) { >> + case hwmon_curr_label: >> + *str = curr_sensor[channel].label; >> + return 0; >> + default: >> + break; >> + } >> + break; >> + >> + case hwmon_power: >> + switch (attr) { >> + case hwmon_power_label: >> + *str = power[channel].label; >> + return 0; >> + default: >> + break; >> + } >> + break; >> + default: >> + break; >> + } >> + >> + return -EOPNOTSUPP; >> +} >> + >> +static umode_t smpro_is_visible(const void *data, enum >> hwmon_sensor_types type, >> + u32 attr, int channel) >> +{ >> + const struct smpro_hwmon *hwmon = data; >> + unsigned int value; >> + int ret; >> + >> + switch (type) { >> + case hwmon_temp: >> + switch (attr) { >> + case hwmon_temp_input: >> + case hwmon_temp_label: >> + case hwmon_temp_crit: >> + ret = regmap_read(hwmon->regmap, >> temperature[channel].reg, &value); >> + if (ret || value == 0xFFFF) >> + return 0; >> + break; >> + } >> + default: >> + break; >> + } >> + >> + return 0444; >> +} >> + >> +static const struct hwmon_channel_info *smpro_info[] = { >> + HWMON_CHANNEL_INFO(temp, >> + HWMON_T_INPUT | HWMON_T_LABEL, >> + HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT, >> + HWMON_T_INPUT | HWMON_T_LABEL, >> + HWMON_T_INPUT | HWMON_T_LABEL, >> + HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT, >> + HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT, >> + HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT, >> + HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT, >> + HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT, >> + HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT, >> + HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT, >> + HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT, >> + HWMON_T_INPUT | HWMON_T_LABEL), >> + HWMON_CHANNEL_INFO(in, >> + HWMON_I_INPUT | HWMON_I_LABEL, >> + HWMON_I_INPUT | HWMON_I_LABEL, >> + HWMON_I_INPUT | HWMON_I_LABEL, >> + HWMON_I_INPUT | HWMON_I_LABEL, >> + HWMON_I_INPUT | HWMON_I_LABEL), >> + HWMON_CHANNEL_INFO(power, >> + HWMON_P_INPUT | HWMON_P_LABEL, >> + HWMON_P_INPUT | HWMON_P_LABEL, >> + HWMON_P_INPUT | HWMON_P_LABEL, >> + HWMON_P_INPUT | HWMON_P_LABEL, >> + HWMON_P_INPUT | HWMON_P_LABEL), >> + HWMON_CHANNEL_INFO(curr, >> + HWMON_C_INPUT | HWMON_C_LABEL, >> + HWMON_C_INPUT | HWMON_C_LABEL, >> + HWMON_C_INPUT | HWMON_C_LABEL, >> + HWMON_C_INPUT | HWMON_C_LABEL, >> + HWMON_C_INPUT | HWMON_C_LABEL), >> + NULL >> +}; >> + >> +static const struct hwmon_ops smpro_hwmon_ops = { >> + .is_visible = smpro_is_visible, >> + .read = smpro_read, >> + .read_string = smpro_read_string, >> +}; >> + >> +static const struct hwmon_chip_info smpro_chip_info = { >> + .ops = &smpro_hwmon_ops, >> + .info = smpro_info, >> +}; >> + >> +static int smpro_hwmon_probe(struct platform_device *pdev) >> +{ >> + struct smpro_hwmon *hwmon; >> + struct device *hwmon_dev; >> + >> + hwmon = devm_kzalloc(&pdev->dev, sizeof(struct smpro_hwmon), >> GFP_KERNEL); >> + if (!hwmon) >> + return -ENOMEM; >> + >> + hwmon->regmap = dev_get_regmap(pdev->dev.parent, NULL); >> + if (!hwmon->regmap) >> + return -ENODEV; >> + >> + hwmon_dev = devm_hwmon_device_register_with_info(&pdev->dev, >> "smpro_hwmon", >> + hwmon, &smpro_chip_info, NULL); >> + >> + return PTR_ERR_OR_ZERO(hwmon_dev); >> +} >> + >> +static struct platform_driver smpro_hwmon_driver = { >> + .probe = smpro_hwmon_probe, >> + .driver = { >> + .name = "smpro-hwmon", >> + }, >> +}; >> + >> +module_platform_driver(smpro_hwmon_driver); >> + >> +MODULE_AUTHOR("Thu Nguyen <thu@os.amperecomputing.com>"); >> +MODULE_AUTHOR("Quan Nguyen <quan@os.amperecomputing.com>"); >> +MODULE_DESCRIPTION("Ampere Altra SMPro hwmon driver"); >> +MODULE_LICENSE("GPL v2"); >> >
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index e3675377bc5d..903c5ef79a5a 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -67,6 +67,14 @@ config SENSORS_ABITUGURU3 This driver can also be built as a module. If so, the module will be called abituguru3. +config SENSORS_SMPRO + tristate "Ampere's Altra SMpro hardware monitoring driver" + depends on MFD_SMPRO + help + If you say yes here you get support for the thermal, voltage, + current and power sensors of Ampere's Altra processor family SoC + with SMpro co-processor. + config SENSORS_AD7314 tristate "Analog Devices AD7314 and compatibles" depends on SPI diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile index d712c61c1f5e..9de5cd9911b0 100644 --- a/drivers/hwmon/Makefile +++ b/drivers/hwmon/Makefile @@ -175,6 +175,7 @@ obj-$(CONFIG_SENSORS_SHT4x) += sht4x.o obj-$(CONFIG_SENSORS_SHTC1) += shtc1.o obj-$(CONFIG_SENSORS_SIS5595) += sis5595.o obj-$(CONFIG_SENSORS_SMM665) += smm665.o +obj-$(CONFIG_SENSORS_SMPRO) += smpro-hwmon.o obj-$(CONFIG_SENSORS_SMSC47B397)+= smsc47b397.o obj-$(CONFIG_SENSORS_SMSC47M1) += smsc47m1.o obj-$(CONFIG_SENSORS_SMSC47M192)+= smsc47m192.o diff --git a/drivers/hwmon/smpro-hwmon.c b/drivers/hwmon/smpro-hwmon.c new file mode 100644 index 000000000000..b01ceea33ddd --- /dev/null +++ b/drivers/hwmon/smpro-hwmon.c @@ -0,0 +1,463 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Ampere Computing SoC's SMPro Hardware Monitoring Driver + * + * Copyright (c) 2021, Ampere Computing LLC + */ +#include <linux/bitfield.h> +#include <linux/bitops.h> +#include <linux/hwmon.h> +#include <linux/hwmon-sysfs.h> +#include <linux/kernel.h> +#include <linux/mod_devicetable.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/property.h> +#include <linux/regmap.h> + +/* Logical Power Sensor Registers */ +#define SOC_TEMP 0x10 +#define SOC_VRD_TEMP 0x11 +#define DIMM_VRD_TEMP 0x12 +#define CORE_VRD_TEMP 0x13 +#define CH0_DIMM_TEMP 0x14 +#define CH1_DIMM_TEMP 0x15 +#define CH2_DIMM_TEMP 0x16 +#define CH3_DIMM_TEMP 0x17 +#define CH4_DIMM_TEMP 0x18 +#define CH5_DIMM_TEMP 0x19 +#define CH6_DIMM_TEMP 0x1A +#define CH7_DIMM_TEMP 0x1B +#define RCA_VRD_TEMP 0x1C + +#define CORE_VRD_PWR 0x20 +#define SOC_PWR 0x21 +#define DIMM_VRD1_PWR 0x22 +#define DIMM_VRD2_PWR 0x23 +#define CORE_VRD_PWR_MW 0x26 +#define SOC_PWR_MW 0x27 +#define DIMM_VRD1_PWR_MW 0x28 +#define DIMM_VRD2_PWR_MW 0x29 +#define RCA_VRD_PWR 0x2A +#define RCA_VRD_PWR_MW 0x2B + +#define MEM_HOT_THRESHOLD 0x32 +#define SOC_VR_HOT_THRESHOLD 0x33 +#define CORE_VRD_VOLT 0x34 +#define SOC_VRD_VOLT 0x35 +#define DIMM_VRD1_VOLT 0x36 +#define DIMM_VRD2_VOLT 0x37 +#define RCA_VRD_VOLT 0x38 + +#define CORE_VRD_CURR 0x39 +#define SOC_VRD_CURR 0x3A +#define DIMM_VRD1_CURR 0x3B +#define DIMM_VRD2_CURR 0x3C +#define RCA_VRD_CURR 0x3D + +struct smpro_hwmon { + struct regmap *regmap; +}; + +struct smpro_sensor { + const u8 reg; + const u8 reg_ext; + const char *label; +}; + +static const struct smpro_sensor temperature[] = { + { + .reg = SOC_TEMP, + .label = "temp1 SoC" + }, + { + .reg = SOC_VRD_TEMP, + .reg_ext = SOC_VR_HOT_THRESHOLD, + .label = "temp2 SoC VRD" + }, + { + .reg = DIMM_VRD_TEMP, + .label = "temp3 DIMM VRD" + }, + { + .reg = CORE_VRD_TEMP, + .label = "temp4 CORE VRD" + }, + { + .reg = CH0_DIMM_TEMP, + .reg_ext = MEM_HOT_THRESHOLD, + .label = "temp5 CH0 DIMM" + }, + { + .reg = CH1_DIMM_TEMP, + .reg_ext = MEM_HOT_THRESHOLD, + .label = "temp6 CH1 DIMM" + }, + { + .reg = CH2_DIMM_TEMP, + .reg_ext = MEM_HOT_THRESHOLD, + .label = "temp7 CH2 DIMM" + }, + { + .reg = CH3_DIMM_TEMP, + .reg_ext = MEM_HOT_THRESHOLD, + .label = "temp8 CH3 DIMM" + }, + { + .reg = CH4_DIMM_TEMP, + .reg_ext = MEM_HOT_THRESHOLD, + .label = "temp9 CH4 DIMM" + }, + { + .reg = CH5_DIMM_TEMP, + .reg_ext = MEM_HOT_THRESHOLD, + .label = "temp10 CH5 DIMM" + }, + { + .reg = CH6_DIMM_TEMP, + .reg_ext = MEM_HOT_THRESHOLD, + .label = "temp11 CH6 DIMM" + }, + { + .reg = CH7_DIMM_TEMP, + .reg_ext = MEM_HOT_THRESHOLD, + .label = "temp12 CH7 DIMM" + }, + { + .reg = RCA_VRD_TEMP, + .label = "temp13 RCA VRD" + }, +}; + +static const struct smpro_sensor voltage[] = { + { + .reg = CORE_VRD_VOLT, + .label = "vout0 CORE VRD" + }, + { + .reg = SOC_VRD_VOLT, + .label = "vout1 SoC VRD" + }, + { + .reg = DIMM_VRD1_VOLT, + .label = "vout2 DIMM VRD1" + }, + { + .reg = DIMM_VRD2_VOLT, + .label = "vout3 DIMM VRD2" + }, + { + .reg = RCA_VRD_VOLT, + .label = "vout4 RCA VRD" + }, +}; + +static const struct smpro_sensor curr_sensor[] = { + { + .reg = CORE_VRD_CURR, + .label = "iout1 CORE VRD" + }, + { + .reg = SOC_VRD_CURR, + .label = "iout2 SoC VRD" + }, + { + .reg = DIMM_VRD1_CURR, + .label = "iout3 DIMM VRD1" + }, + { + .reg = DIMM_VRD2_CURR, + .label = "iout4 DIMM VRD2" + }, + { + .reg = RCA_VRD_CURR, + .label = "iout5 RCA VRD" + }, +}; + +static const struct smpro_sensor power[] = { + { + .reg = CORE_VRD_PWR, + .reg_ext = CORE_VRD_PWR_MW, + .label = "power1 CORE VRD" + }, + { + .reg = SOC_PWR, + .reg_ext = SOC_PWR_MW, + .label = "power2 SoC" + }, + { + .reg = DIMM_VRD1_PWR, + .reg_ext = DIMM_VRD1_PWR_MW, + .label = "power3 DIMM VRD1" + }, + { + .reg = DIMM_VRD2_PWR, + .reg_ext = DIMM_VRD2_PWR_MW, + .label = "power4 DIMM VRD2" + }, + { + .reg = RCA_VRD_PWR, + .reg_ext = RCA_VRD_PWR_MW, + .label = "power5 RCA VRD" + }, +}; + +static int smpro_read_temp(struct device *dev, u32 attr, int channel, long *val) +{ + struct smpro_hwmon *hwmon = dev_get_drvdata(dev); + unsigned int value; + int ret; + + switch (attr) { + case hwmon_temp_input: + ret = regmap_read(hwmon->regmap, temperature[channel].reg, &value); + if (ret) + return ret; + break; + case hwmon_temp_crit: + ret = regmap_read(hwmon->regmap, temperature[channel].reg_ext, &value); + if (ret) + return ret; + break; + default: + return -EOPNOTSUPP; + } + + *val = sign_extend32(value, 8) * 1000; + return 0; +} + +static int smpro_read_in(struct device *dev, u32 attr, int channel, long *val) +{ + struct smpro_hwmon *hwmon = dev_get_drvdata(dev); + unsigned int value; + int ret; + + switch (attr) { + case hwmon_in_input: + ret = regmap_read(hwmon->regmap, voltage[channel].reg, &value); + if (ret < 0) + return ret; + /* 15-bit value in 1mV */ + *val = value & 0x7fff; + return 0; + default: + return -EOPNOTSUPP; + } +} + +static int smpro_read_curr(struct device *dev, u32 attr, int channel, long *val) +{ + struct smpro_hwmon *hwmon = dev_get_drvdata(dev); + unsigned int value; + int ret; + + switch (attr) { + case hwmon_curr_input: + ret = regmap_read(hwmon->regmap, curr_sensor[channel].reg, &value); + if (ret < 0) + return ret; + /* Scale reported by the hardware is 1mA */ + *val = value & 0x7fff; + return 0; + default: + return -EOPNOTSUPP; + } +} + +static int smpro_read_power(struct device *dev, u32 attr, int channel, long *val_pwr) +{ + struct smpro_hwmon *hwmon = dev_get_drvdata(dev); + unsigned int val = 0, val_mw = 0; + int ret; + + switch (attr) { + case hwmon_power_input: + ret = regmap_read(hwmon->regmap, power[channel].reg, &val); + if (ret) + return ret; + + ret = regmap_read(hwmon->regmap, power[channel].reg_ext, &val_mw); + if (ret) + return ret; + + *val_pwr = val * 1000000 + val_mw * 1000; + return 0; + + default: + return -EOPNOTSUPP; + } +} + +static int smpro_read(struct device *dev, enum hwmon_sensor_types type, + u32 attr, int channel, long *val) +{ + switch (type) { + case hwmon_temp: + return smpro_read_temp(dev, attr, channel, val); + case hwmon_in: + return smpro_read_in(dev, attr, channel, val); + case hwmon_power: + return smpro_read_power(dev, attr, channel, val); + case hwmon_curr: + return smpro_read_curr(dev, attr, channel, val); + default: + return -EOPNOTSUPP; + } +} + +static int smpro_read_string(struct device *dev, enum hwmon_sensor_types type, + u32 attr, int channel, const char **str) +{ + switch (type) { + case hwmon_temp: + switch (attr) { + case hwmon_temp_label: + *str = temperature[channel].label; + return 0; + default: + break; + } + break; + + case hwmon_in: + switch (attr) { + case hwmon_in_label: + *str = voltage[channel].label; + return 0; + default: + break; + } + break; + + case hwmon_curr: + switch (attr) { + case hwmon_curr_label: + *str = curr_sensor[channel].label; + return 0; + default: + break; + } + break; + + case hwmon_power: + switch (attr) { + case hwmon_power_label: + *str = power[channel].label; + return 0; + default: + break; + } + break; + default: + break; + } + + return -EOPNOTSUPP; +} + +static umode_t smpro_is_visible(const void *data, enum hwmon_sensor_types type, + u32 attr, int channel) +{ + const struct smpro_hwmon *hwmon = data; + unsigned int value; + int ret; + + switch (type) { + case hwmon_temp: + switch (attr) { + case hwmon_temp_input: + case hwmon_temp_label: + case hwmon_temp_crit: + ret = regmap_read(hwmon->regmap, temperature[channel].reg, &value); + if (ret || value == 0xFFFF) + return 0; + break; + } + default: + break; + } + + return 0444; +} + +static const struct hwmon_channel_info *smpro_info[] = { + HWMON_CHANNEL_INFO(temp, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT, + HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT, + HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT, + HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT, + HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT, + HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT, + HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT, + HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT, + HWMON_T_INPUT | HWMON_T_LABEL), + HWMON_CHANNEL_INFO(in, + HWMON_I_INPUT | HWMON_I_LABEL, + HWMON_I_INPUT | HWMON_I_LABEL, + HWMON_I_INPUT | HWMON_I_LABEL, + HWMON_I_INPUT | HWMON_I_LABEL, + HWMON_I_INPUT | HWMON_I_LABEL), + HWMON_CHANNEL_INFO(power, + HWMON_P_INPUT | HWMON_P_LABEL, + HWMON_P_INPUT | HWMON_P_LABEL, + HWMON_P_INPUT | HWMON_P_LABEL, + HWMON_P_INPUT | HWMON_P_LABEL, + HWMON_P_INPUT | HWMON_P_LABEL), + HWMON_CHANNEL_INFO(curr, + HWMON_C_INPUT | HWMON_C_LABEL, + HWMON_C_INPUT | HWMON_C_LABEL, + HWMON_C_INPUT | HWMON_C_LABEL, + HWMON_C_INPUT | HWMON_C_LABEL, + HWMON_C_INPUT | HWMON_C_LABEL), + NULL +}; + +static const struct hwmon_ops smpro_hwmon_ops = { + .is_visible = smpro_is_visible, + .read = smpro_read, + .read_string = smpro_read_string, +}; + +static const struct hwmon_chip_info smpro_chip_info = { + .ops = &smpro_hwmon_ops, + .info = smpro_info, +}; + +static int smpro_hwmon_probe(struct platform_device *pdev) +{ + struct smpro_hwmon *hwmon; + struct device *hwmon_dev; + + hwmon = devm_kzalloc(&pdev->dev, sizeof(struct smpro_hwmon), GFP_KERNEL); + if (!hwmon) + return -ENOMEM; + + hwmon->regmap = dev_get_regmap(pdev->dev.parent, NULL); + if (!hwmon->regmap) + return -ENODEV; + + hwmon_dev = devm_hwmon_device_register_with_info(&pdev->dev, "smpro_hwmon", + hwmon, &smpro_chip_info, NULL); + + return PTR_ERR_OR_ZERO(hwmon_dev); +} + +static struct platform_driver smpro_hwmon_driver = { + .probe = smpro_hwmon_probe, + .driver = { + .name = "smpro-hwmon", + }, +}; + +module_platform_driver(smpro_hwmon_driver); + +MODULE_AUTHOR("Thu Nguyen <thu@os.amperecomputing.com>"); +MODULE_AUTHOR("Quan Nguyen <quan@os.amperecomputing.com>"); +MODULE_DESCRIPTION("Ampere Altra SMPro hwmon driver"); +MODULE_LICENSE("GPL v2");
This commit adds support for Ampere SMpro hwmon driver. This driver supports accessing various CPU sensors provided by the SMpro co-processor including temperature, power, voltages, and current. Signed-off-by: Quan Nguyen <quan@os.amperecomputing.com> --- Changes in v5: + Drop ManufacturerID checking when probe as it was checked during smpro-mfd probing [Quan] + Drop the use of register offset [Quan] + Removed the use of compatible string as it is instantiated by smpro-mfd driver [Quan] + Thanks Guenter for the Reviewed-by in last version, but it was not added because there's some changes in this version. Really appreciate if you could help again, thank you. Changes in v4: + Returned regmap_read() error code [Guenter] Changes in v3: + Handled negative temperature value [Guenter] + Returned -ENODEV if Manufacturer ID is wrong [Guenter] + Refactored smpro_read_string() and smpro_temp_read() [Guenter] + Removed smpro_write() function [Guenter] + Added minor refactor changes [Quan] Changes in v2: + Removed "virtual" sensors [Guenter] + Reported SOC_TDP as "Socket TDP" using max attributes [Guenter] + Corrected return error code when host is turn off [Guenter] + Reported MEM HOT Threshold for all DIMMs as temp*_crit [Guenter] + Removed license info as SPDX-License-Identifier existed [Guenter] + Added is_visible() support [Guenter] + Used HWMON_CHANNEL_INFO() macro and LABEL attributes [Guenter] + Made is_valid_id() return boolean [Guenter] + Returned -EPROBE_DEFER when smpro reg inaccessible [Guenter] + Removed unnecessary error message when dev register fail [Guenter] + Removed Socket TDP sensor [Quan] + Included sensor type and channel in labels [Quan] + Refactorized code to fix checkpatch.pl --strict complaint [Quan] drivers/hwmon/Kconfig | 8 + drivers/hwmon/Makefile | 1 + drivers/hwmon/smpro-hwmon.c | 463 ++++++++++++++++++++++++++++++++++++ 3 files changed, 472 insertions(+) create mode 100644 drivers/hwmon/smpro-hwmon.c