diff options
| -rw-r--r-- | drivers/hwmon/Kconfig | 10 | ||||
| -rw-r--r-- | drivers/hwmon/Makefile | 1 | ||||
| -rw-r--r-- | drivers/hwmon/lenovo-ec-sensors.c | 602 |
3 files changed, 613 insertions, 0 deletions
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index c89776d91795..bafc0058c728 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -917,6 +917,16 @@ config SENSORS_LAN966X This driver can also be built as a module. If so, the module will be called lan966x-hwmon. +config SENSORS_LENOVO_EC + tristate "Sensor reader for Lenovo ThinkStations" + depends on X86 + help + If you say yes here you get support for LENOVO + EC Sensor data on newer ThinkStation systems + + This driver can also be built as a module. If so, the module + will be called lenovo_ec_sensors. + config SENSORS_LINEAGE tristate "Lineage Compact Power Line Power Entry Module" depends on I2C diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile index 5c31808f6378..e3f25475d1f0 100644 --- a/drivers/hwmon/Makefile +++ b/drivers/hwmon/Makefile @@ -108,6 +108,7 @@ obj-$(CONFIG_SENSORS_JC42) += jc42.o obj-$(CONFIG_SENSORS_K8TEMP) += k8temp.o obj-$(CONFIG_SENSORS_K10TEMP) += k10temp.o obj-$(CONFIG_SENSORS_LAN966X) += lan966x-hwmon.o +obj-$(CONFIG_SENSORS_LENOVO_EC) += lenovo-ec-sensors.o obj-$(CONFIG_SENSORS_LINEAGE) += lineage-pem.o obj-$(CONFIG_SENSORS_LOCHNAGAR) += lochnagar-hwmon.o obj-$(CONFIG_SENSORS_LM63) += lm63.o diff --git a/drivers/hwmon/lenovo-ec-sensors.c b/drivers/hwmon/lenovo-ec-sensors.c new file mode 100644 index 000000000000..143fb79713f7 --- /dev/null +++ b/drivers/hwmon/lenovo-ec-sensors.c @@ -0,0 +1,602 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * HWMON driver for Lenovo ThinkStation based workstations + * via the embedded controller registers + * + * Copyright (C) 2024 David Ober (Lenovo) <dober@lenovo.com> + * + * EC provides: + * - CPU temperature + * - DIMM temperature + * - Chassis zone temperatures + * - CPU fan RPM + * - DIMM fan RPM + * - Chassis fans RPM + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/acpi.h> +#include <linux/bits.h> +#include <linux/delay.h> +#include <linux/device.h> +#include <linux/dmi.h> +#include <linux/err.h> +#include <linux/hwmon.h> +#include <linux/io.h> +#include <linux/ioport.h> +#include <linux/module.h> +#include <linux/mutex.h> +#include <linux/platform_device.h> +#include <linux/types.h> +#include <linux/units.h> + +#define MCHP_SING_IDX 0x0000 +#define MCHP_EMI0_APPLICATION_ID 0x090C +#define MCHP_EMI0_EC_ADDRESS 0x0902 +#define MCHP_EMI0_EC_DATA_BYTE0 0x0904 +#define MCHP_EMI0_EC_DATA_BYTE1 0x0905 +#define MCHP_EMI0_EC_DATA_BYTE2 0x0906 +#define MCHP_EMI0_EC_DATA_BYTE3 0x0907 +#define IO_REGION_START 0x0900 +#define IO_REGION_LENGTH 0xD + +static inline u8 +get_ec_reg(unsigned char page, unsigned char index) +{ + u8 onebyte; + unsigned short m_index; + unsigned short phy_index = page * 256 + index; + + outb_p(0x01, MCHP_EMI0_APPLICATION_ID); + + m_index = phy_index & GENMASK(14, 2); + outw_p(m_index, MCHP_EMI0_EC_ADDRESS); + + onebyte = inb_p(MCHP_EMI0_EC_DATA_BYTE0 + (phy_index & GENMASK(1, 0))); + + outb_p(0x01, MCHP_EMI0_APPLICATION_ID); /* write 0x01 again to clean */ + return onebyte; +} + +enum systems { + LENOVO_PX, + LENOVO_P7, + LENOVO_P5, + LENOVO_P8, +}; + +static int px_temp_map[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}; + +static const char * const lenovo_px_ec_temp_label[] = { + "CPU1", + "CPU2", + "R_DIMM1", + "L_DIMM1", + "R_DIMM2", + "L_DIMM2", + "PCH", + "M2_R", + "M2_Z1R", + "M2_Z2R", + "PCI_Z1", + "PCI_Z2", + "PCI_Z3", + "PCI_Z4", + "AMB", +}; + +static int gen_temp_map[] = {0, 2, 3, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}; + +static const char * const lenovo_gen_ec_temp_label[] = { + "CPU1", + "R_DIMM", + "L_DIMM", + "PCH", + "M2_R", + "M2_Z1R", + "M2_Z2R", + "PCI_Z1", + "PCI_Z2", + "PCI_Z3", + "PCI_Z4", + "AMB", +}; + +static int px_fan_map[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}; + +static const char * const px_ec_fan_label[] = { + "CPU1_Fan", + "CPU2_Fan", + "Front_Fan1-1", + "Front_Fan1-2", + "Front_Fan2", + "Front_Fan3", + "MEM_Fan1", + "MEM_Fan2", + "Rear_Fan1", + "Rear_Fan2", + "Flex_Bay_Fan1", + "Flex_Bay_Fan2", + "Flex_Bay_Fan2", + "PSU_HDD_Fan", + "PSU1_Fan", + "PSU2_Fan", +}; + +static int p7_fan_map[] = {0, 2, 3, 4, 5, 6, 7, 8, 10, 11, 14}; + +static const char * const p7_ec_fan_label[] = { + "CPU1_Fan", + "HP_CPU_Fan1", + "HP_CPU_Fan2", + "PCIE1_4_Fan", + "PCIE5_7_Fan", + "MEM_Fan1", + "MEM_Fan2", + "Rear_Fan1", + "BCB_Fan", + "Flex_Bay_Fan", + "PSU_Fan", +}; + +static int p5_fan_map[] = {0, 5, 6, 7, 8, 10, 11, 14}; + +static const char * const p5_ec_fan_label[] = { + "CPU_Fan", + "HDD_Fan", + "Duct_Fan1", + "MEM_Fan", + "Rear_Fan", + "Front_Fan", + "Flex_Bay_Fan", + "PSU_Fan", +}; + +static int p8_fan_map[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14}; + +static const char * const p8_ec_fan_label[] = { + "CPU1_Fan", + "CPU2_Fan", + "HP_CPU_Fan1", + "HP_CPU_Fan2", + "PCIE1_4_Fan", + "PCIE5_7_Fan", + "DIMM1_Fan1", + "DIMM1_Fan2", + "DIMM2_Fan1", + "DIMM2_Fan2", + "Rear_Fan", + "HDD_Bay_Fan", + "Flex_Bay_Fan", + "PSU_Fan", +}; + +struct ec_sensors_data { + struct mutex mec_mutex; /* lock for sensor data access */ + const char *const *fan_labels; + const char *const *temp_labels; + const int *fan_map; + const int *temp_map; +}; + +static int +lenovo_ec_do_read_temp(struct ec_sensors_data *data, u32 attr, int channel, long *val) +{ + u8 lsb; + + switch (attr) { + case hwmon_temp_input: + mutex_lock(&data->mec_mutex); + lsb = get_ec_reg(2, 0x81 + channel); + mutex_unlock(&data->mec_mutex); + if (lsb <= 0x40) + return -ENODATA; + *val = (lsb - 0x40) * 1000; + return 0; + default: + return -EOPNOTSUPP; + } +} + +static int +lenovo_ec_do_read_fan(struct ec_sensors_data *data, u32 attr, int channel, long *val) +{ + u8 lsb, msb; + + channel *= 2; + switch (attr) { + case hwmon_fan_input: + mutex_lock(&data->mec_mutex); + lsb = get_ec_reg(4, 0x20 + channel); + msb = get_ec_reg(4, 0x21 + channel); + mutex_unlock(&data->mec_mutex); + *val = (msb << 8) + lsb; + return 0; + case hwmon_fan_max: + mutex_lock(&data->mec_mutex); + lsb = get_ec_reg(4, 0x40 + channel); + msb = get_ec_reg(4, 0x41 + channel); + mutex_unlock(&data->mec_mutex); + *val = (msb << 8) + lsb; + return 0; + default: + return -EOPNOTSUPP; + } +} + +static int +lenovo_ec_hwmon_read_string(struct device *dev, enum hwmon_sensor_types type, + u32 attr, int channel, const char **str) +{ + struct ec_sensors_data *state = dev_get_drvdata(dev); + + switch (type) { + case hwmon_temp: + *str = state->temp_labels[channel]; + return 0; + case hwmon_fan: + *str = state->fan_labels[channel]; + return 0; + default: + return -EOPNOTSUPP; + } +} + +static int +lenovo_ec_hwmon_read(struct device *dev, enum hwmon_sensor_types type, + u32 attr, int channel, long *val) +{ + struct ec_sensors_data *data = dev_get_drvdata(dev); + + switch (type) { + case hwmon_temp: + return lenovo_ec_do_read_temp(data, attr, data->temp_map[channel], val); + case hwmon_fan: + return lenovo_ec_do_read_fan(data, attr, data->fan_map[channel], val); + default: + return -EOPNOTSUPP; + } +} + +static umode_t +lenovo_ec_hwmon_is_visible(const void *data, enum hwmon_sensor_types type, + u32 attr, int channel) +{ + switch (type) { + case hwmon_temp: + if (attr == hwmon_temp_input || attr == hwmon_temp_label) + return 0444; + return 0; + case hwmon_fan: + if (attr == hwmon_fan_input || attr == hwmon_fan_max || attr == hwmon_fan_label) + return 0444; + return 0; + default: + return 0; + } +} + +static const struct hwmon_channel_info *lenovo_ec_hwmon_info_px[] = { + HWMON_CHANNEL_INFO(temp, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL), + HWMON_CHANNEL_INFO(fan, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX), + NULL +}; + +static const struct hwmon_channel_info *lenovo_ec_hwmon_info_p8[] = { + HWMON_CHANNEL_INFO(temp, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL), + HWMON_CHANNEL_INFO(fan, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX), + NULL +}; + +static const struct hwmon_channel_info *lenovo_ec_hwmon_info_p7[] = { + HWMON_CHANNEL_INFO(temp, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL), + HWMON_CHANNEL_INFO(fan, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX), + NULL +}; + +static const struct hwmon_channel_info *lenovo_ec_hwmon_info_p5[] = { + HWMON_CHANNEL_INFO(temp, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL), + HWMON_CHANNEL_INFO(fan, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX, + HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MAX), + NULL +}; + +static const struct hwmon_ops lenovo_ec_hwmon_ops = { + .is_visible = lenovo_ec_hwmon_is_visible, + .read = lenovo_ec_hwmon_read, + .read_string = lenovo_ec_hwmon_read_string, +}; + +static struct hwmon_chip_info lenovo_ec_chip_info = { + .ops = &lenovo_ec_hwmon_ops, +}; + +static const struct dmi_system_id thinkstation_dmi_table[] = { + { + .ident = "LENOVO_PX", + .driver_data = (void *)(long)LENOVO_PX, + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "30EU"), + }, + }, + { + .ident = "LENOVO_PX", + .driver_data = (void *)(long)LENOVO_PX, + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "30EV"), + }, + }, + { + .ident = "LENOVO_P7", + .driver_data = (void *)(long)LENOVO_P7, + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "30F2"), + }, + }, + { + .ident = "LENOVO_P7", + .driver_data = (void *)(long)LENOVO_P7, + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "30F3"), + }, + }, + { + .ident = "LENOVO_P5", + .driver_data = (void *)(long)LENOVO_P5, + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "30G9"), + }, + }, + { + .ident = "LENOVO_P5", + .driver_data = (void *)(long)LENOVO_P5, + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "30GA"), + }, + }, + { + .ident = "LENOVO_P8", + .driver_data = (void *)(long)LENOVO_P8, + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "30HH"), + }, + }, + { + .ident = "LENOVO_P8", + .driver_data = (void *)(long)LENOVO_P8, + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "30HJ"), + }, + }, + {} +}; +MODULE_DEVICE_TABLE(dmi, thinkstation_dmi_table); + +static int lenovo_ec_probe(struct platform_device *pdev) +{ + struct device *hwdev; + struct ec_sensors_data *ec_data; + const struct hwmon_chip_info *chip_info; + struct device *dev = &pdev->dev; + const struct dmi_system_id *dmi_id; + int app_id; + + ec_data = devm_kzalloc(dev, sizeof(struct ec_sensors_data), GFP_KERNEL); + if (!ec_data) + return -ENOMEM; + + if (!request_region(IO_REGION_START, IO_REGION_LENGTH, "LNV-WKS")) { + pr_err(":request fail\n"); + return -EIO; + } + + dev_set_drvdata(dev, ec_data); + + chip_info = &lenovo_ec_chip_info; + + mutex_init(&ec_data->mec_mutex); + + mutex_lock(&ec_data->mec_mutex); + app_id = inb_p(MCHP_EMI0_APPLICATION_ID); + if (app_id) /* check EMI Application ID Value */ + outb_p(app_id, MCHP_EMI0_APPLICATION_ID); /* set EMI Application ID to 0 */ + outw_p(MCHP_SING_IDX, MCHP_EMI0_EC_ADDRESS); + mutex_unlock(&ec_data->mec_mutex); + + if ((inb_p(MCHP_EMI0_EC_DATA_BYTE0) != 'M') && + (inb_p(MCHP_EMI0_EC_DATA_BYTE1) != 'C') && + (inb_p(MCHP_EMI0_EC_DATA_BYTE2) != 'H') && + (inb_p(MCHP_EMI0_EC_DATA_BYTE3) != 'P')) { + release_region(IO_REGION_START, IO_REGION_LENGTH); + return -ENODEV; + } + + dmi_id = dmi_first_match(thinkstation_dmi_table); + + switch ((long)dmi_id->driver_data) { + case 0: + ec_data->fan_labels = px_ec_fan_label; + ec_data->temp_labels = lenovo_px_ec_temp_label; + ec_data->fan_map = px_fan_map; + ec_data->temp_map = px_temp_map; + lenovo_ec_chip_info.info = lenovo_ec_hwmon_info_px; + break; + case 1: + ec_data->fan_labels = p7_ec_fan_label; + ec_data->temp_labels = lenovo_gen_ec_temp_label; + ec_data->fan_map = p7_fan_map; + ec_data->temp_map = gen_temp_map; + lenovo_ec_chip_info.info = lenovo_ec_hwmon_info_p7; + break; + case 2: + ec_data->fan_labels = p5_ec_fan_label; + ec_data->temp_labels = lenovo_gen_ec_temp_label; + ec_data->fan_map = p5_fan_map; + ec_data->temp_map = gen_temp_map; + lenovo_ec_chip_info.info = lenovo_ec_hwmon_info_p5; + break; + case 3: + ec_data->fan_labels = p8_ec_fan_label; + ec_data->temp_labels = lenovo_gen_ec_temp_label; + ec_data->fan_map = p8_fan_map; + ec_data->temp_map = gen_temp_map; + lenovo_ec_chip_info.info = lenovo_ec_hwmon_info_p8; + break; + default: + release_region(IO_REGION_START, IO_REGION_LENGTH); + return -ENODEV; + } + + hwdev = devm_hwmon_device_register_with_info(dev, "lenovo_ec", + ec_data, + chip_info, NULL); + + return PTR_ERR_OR_ZERO(hwdev); +} + +static struct platform_driver lenovo_ec_sensors_platform_driver = { + .driver = { + .name = "lenovo-ec-sensors", + }, + .probe = lenovo_ec_probe, +}; + +static struct platform_device *lenovo_ec_sensors_platform_device; + +static int __init lenovo_ec_init(void) +{ + if (!dmi_check_system(thinkstation_dmi_table)) + return -ENODEV; + + lenovo_ec_sensors_platform_device = + platform_create_bundle(&lenovo_ec_sensors_platform_driver, + lenovo_ec_probe, NULL, 0, NULL, 0); + + if (IS_ERR(lenovo_ec_sensors_platform_device)) { + release_region(IO_REGION_START, IO_REGION_LENGTH); + return PTR_ERR(lenovo_ec_sensors_platform_device); + } + + return 0; +} +module_init(lenovo_ec_init); + +static void __exit lenovo_ec_exit(void) +{ + release_region(IO_REGION_START, IO_REGION_LENGTH); + platform_device_unregister(lenovo_ec_sensors_platform_device); + platform_driver_unregister(&lenovo_ec_sensors_platform_driver); +} +module_exit(lenovo_ec_exit); + +MODULE_AUTHOR("David Ober <dober@lenovo.com>"); +MODULE_DESCRIPTION("HWMON driver for sensors accessible via EC in LENOVO motherboards"); +MODULE_LICENSE("GPL"); |