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path: root/drivers/hwmon/lenovo-ec-sensors.c
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-rw-r--r--drivers/hwmon/lenovo-ec-sensors.c602
1 files changed, 602 insertions, 0 deletions
diff --git a/drivers/hwmon/lenovo-ec-sensors.c b/drivers/hwmon/lenovo-ec-sensors.c
new file mode 100644
index 0000000000..143fb79713
--- /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");
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-24 05:57:10 +0000