diff options
Diffstat (limited to 'drivers/hwmon')
| -rw-r--r-- | drivers/hwmon/Kconfig | 10 | ||||
| -rw-r--r-- | drivers/hwmon/Makefile | 1 | ||||
| -rw-r--r-- | drivers/hwmon/mc33xs2410_hwmon.c | 178 |
3 files changed, 189 insertions, 0 deletions
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index 079620dd4286..9d28fcf7cd2a 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -700,6 +700,16 @@ config SENSORS_MC13783_ADC help Support for the A/D converter on MC13783 and MC13892 PMIC. +config SENSORS_MC33XS2410 + tristate "MC33XS2410 HWMON support" + depends on PWM_MC33XS2410 + help + If you say yes here you get hardware monitoring support for + MC33XS2410. + + This driver can also be built as a module. If so, the module + will be called mc33xs2410_hwmon. + config SENSORS_FSCHMD tristate "Fujitsu Siemens Computers sensor chips" depends on (X86 || COMPILE_TEST) && I2C diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile index 48e5866c0c9a..cd8bc4752b4d 100644 --- a/drivers/hwmon/Makefile +++ b/drivers/hwmon/Makefile @@ -165,6 +165,7 @@ obj-$(CONFIG_SENSORS_MAX31790) += max31790.o obj-$(CONFIG_MAX31827) += max31827.o obj-$(CONFIG_SENSORS_MAX77705) += max77705-hwmon.o obj-$(CONFIG_SENSORS_MC13783_ADC)+= mc13783-adc.o +obj-$(CONFIG_SENSORS_MC33XS2410) += mc33xs2410_hwmon.o obj-$(CONFIG_SENSORS_MC34VR500) += mc34vr500.o obj-$(CONFIG_SENSORS_MCP3021) += mcp3021.o obj-$(CONFIG_SENSORS_TC654) += tc654.o diff --git a/drivers/hwmon/mc33xs2410_hwmon.c b/drivers/hwmon/mc33xs2410_hwmon.c new file mode 100644 index 000000000000..23eb90e33709 --- /dev/null +++ b/drivers/hwmon/mc33xs2410_hwmon.c @@ -0,0 +1,178 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2025 Liebherr-Electronics and Drives GmbH + */ + +#include <linux/auxiliary_bus.h> +#include <linux/bitfield.h> +#include <linux/bitops.h> +#include <linux/hwmon.h> +#include <linux/mc33xs2410.h> +#include <linux/module.h> + +/* ctrl registers */ + +#define MC33XS2410_TEMP_WT 0x29 +#define MC33XS2410_TEMP_WT_MASK GENMASK(7, 0) + +/* diag registers */ + +/* chan in { 1 ... 4 } */ +#define MC33XS2410_OUT_STA(chan) (0x02 + (chan) - 1) +#define MC33XS2410_OUT_STA_OTW BIT(8) + +#define MC33XS2410_TS_TEMP_DIE 0x26 +#define MC33XS2410_TS_TEMP_MASK GENMASK(9, 0) + +/* chan in { 1 ... 4 } */ +#define MC33XS2410_TS_TEMP(chan) (0x2f + (chan) - 1) + +static const struct hwmon_channel_info * const mc33xs2410_hwmon_info[] = { + HWMON_CHANNEL_INFO(temp, + HWMON_T_LABEL | HWMON_T_INPUT, + HWMON_T_LABEL | HWMON_T_INPUT | HWMON_T_MAX | + HWMON_T_ALARM, + HWMON_T_LABEL | HWMON_T_INPUT | HWMON_T_MAX | + HWMON_T_ALARM, + HWMON_T_LABEL | HWMON_T_INPUT | HWMON_T_MAX | + HWMON_T_ALARM, + HWMON_T_LABEL | HWMON_T_INPUT | HWMON_T_MAX | + HWMON_T_ALARM), + NULL, +}; + +static umode_t mc33xs2410_hwmon_is_visible(const void *data, + enum hwmon_sensor_types type, + u32 attr, int channel) +{ + switch (attr) { + case hwmon_temp_input: + case hwmon_temp_alarm: + case hwmon_temp_label: + return 0444; + case hwmon_temp_max: + return 0644; + default: + return 0; + } +} + +static int mc33xs2410_hwmon_read(struct device *dev, + enum hwmon_sensor_types type, + u32 attr, int channel, long *val) +{ + struct spi_device *spi = dev_get_drvdata(dev); + u16 reg_val; + int ret; + u8 reg; + + switch (attr) { + case hwmon_temp_input: + reg = (channel == 0) ? MC33XS2410_TS_TEMP_DIE : + MC33XS2410_TS_TEMP(channel); + ret = mc33xs2410_read_reg_diag(spi, reg, ®_val); + if (ret < 0) + return ret; + + /* LSB is 0.25 degree celsius */ + *val = FIELD_GET(MC33XS2410_TS_TEMP_MASK, reg_val) * 250 - 40000; + return 0; + case hwmon_temp_alarm: + ret = mc33xs2410_read_reg_diag(spi, MC33XS2410_OUT_STA(channel), + ®_val); + if (ret < 0) + return ret; + + *val = FIELD_GET(MC33XS2410_OUT_STA_OTW, reg_val); + return 0; + case hwmon_temp_max: + ret = mc33xs2410_read_reg_ctrl(spi, MC33XS2410_TEMP_WT, ®_val); + if (ret < 0) + return ret; + + /* LSB is 1 degree celsius */ + *val = FIELD_GET(MC33XS2410_TEMP_WT_MASK, reg_val) * 1000 - 40000; + return 0; + default: + return -EOPNOTSUPP; + } +} + +static int mc33xs2410_hwmon_write(struct device *dev, + enum hwmon_sensor_types type, u32 attr, + int channel, long val) +{ + struct spi_device *spi = dev_get_drvdata(dev); + + switch (attr) { + case hwmon_temp_max: + val = clamp_val(val, -40000, 215000); + + /* LSB is 1 degree celsius */ + val = (val / 1000) + 40; + return mc33xs2410_modify_reg(spi, MC33XS2410_TEMP_WT, + MC33XS2410_TEMP_WT_MASK, val); + default: + return -EOPNOTSUPP; + } +} + +static const char *const mc33xs2410_temp_label[] = { + "Central die temperature", + "Channel 1 temperature", + "Channel 2 temperature", + "Channel 3 temperature", + "Channel 4 temperature", +}; + +static int mc33xs2410_read_string(struct device *dev, + enum hwmon_sensor_types type, + u32 attr, int channel, const char **str) +{ + *str = mc33xs2410_temp_label[channel]; + + return 0; +} + +static const struct hwmon_ops mc33xs2410_hwmon_hwmon_ops = { + .is_visible = mc33xs2410_hwmon_is_visible, + .read = mc33xs2410_hwmon_read, + .read_string = mc33xs2410_read_string, + .write = mc33xs2410_hwmon_write, +}; + +static const struct hwmon_chip_info mc33xs2410_hwmon_chip_info = { + .ops = &mc33xs2410_hwmon_hwmon_ops, + .info = mc33xs2410_hwmon_info, +}; + +static int mc33xs2410_hwmon_probe(struct auxiliary_device *adev, + const struct auxiliary_device_id *id) +{ + struct device *dev = &adev->dev; + struct spi_device *spi = container_of(dev->parent, struct spi_device, dev); + struct device *hwmon; + + hwmon = devm_hwmon_device_register_with_info(dev, NULL, spi, + &mc33xs2410_hwmon_chip_info, + NULL); + return PTR_ERR_OR_ZERO(hwmon); +} + +static const struct auxiliary_device_id mc33xs2410_hwmon_ids[] = { + { + .name = "pwm_mc33xs2410.hwmon", + }, + { } +}; +MODULE_DEVICE_TABLE(auxiliary, mc33xs2410_hwmon_ids); + +static struct auxiliary_driver mc33xs2410_hwmon_driver = { + .probe = mc33xs2410_hwmon_probe, + .id_table = mc33xs2410_hwmon_ids, +}; +module_auxiliary_driver(mc33xs2410_hwmon_driver); + +MODULE_DESCRIPTION("NXP MC33XS2410 hwmon driver"); +MODULE_AUTHOR("Dimitri Fedrau <dimitri.fedrau@liebherr.com>"); +MODULE_LICENSE("GPL"); |