[PATCH v2 3/3] hwmon: (asus_wmi_sensors) Support X370 Asus WMI.

Denis Pauk
2021-10-06T22:25:32Z

Provides a Linux kernel module "asus_wmi_sensors" that provides sensor
readouts via ASUS' WMI interface present in the UEFI of
X370/X470/B450/X399 Ryzen motherboards.

Supported motherboards:
* ROG CROSSHAIR VI HERO,
* PRIME X399-A,
* PRIME X470-PRO,
* ROG CROSSHAIR VI EXTREME,
* ROG CROSSHAIR VI HERO (WI-FI AC),
* ROG CROSSHAIR VII HERO,
* ROG CROSSHAIR VII HERO (WI-FI),
* ROG STRIX B450-E GAMING,
* ROG STRIX B450-F GAMING,
* ROG STRIX B450-I GAMING,
* ROG STRIX X399-E GAMING,
* ROG STRIX X470-F GAMING,
* ROG STRIX X470-I GAMING,
* ROG ZENITH EXTREME,
* ROG ZENITH EXTREME ALPHA.

BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=204807
Signed-off-by: Denis Pauk <pauk.denis@gmail.com>
Co-developed-by: Ed Brindley <kernel@maidavale.org>
Signed-off-by: Ed Brindley <kernel@maidavale.org>

---
Changes in v2:
- Add module for boards with support of WMI interface returned sensor name and
value of sensor..
---
MAINTAINERS | 1 +
drivers/hwmon/Kconfig | 11 +
drivers/hwmon/Makefile | 1 +
drivers/hwmon/asus_wmi_sensors.c | 661 +++++++++++++++++++++++++++++++
4 files changed, 674 insertions(+)
create mode 100644 drivers/hwmon/asus_wmi_sensors.c

diff --git a/MAINTAINERS b/MAINTAINERS
index bc2e981a54e2..3f77d1d17841 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2942,6 +2942,7 @@ M: Eugene Shalygin <eugene.shalygin@gmail.com>
M: Denis Pauk <pauk.denis@gmail.com>
L: linux-hwmon@vger.kernel.org
S: Maintained
+F: drivers/hwmon/asus_wmi_sensors.c
F: drivers/hwmon/asus_wmi_ec_sensors.c

ASUS WIRELESS RADIO CONTROL DRIVER
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index b7107721a401..ddb1d251d81a 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -2215,6 +2215,17 @@ config SENSORS_ATK0110
This driver can also be built as a module. If so, the module
will be called asus_atk0110.

+config SENSORS_ASUS_WMI
+ tristate "ASUS WMI X370/X470/B450/X399"
+ help
+ If you say yes here you get support for the ACPI hardware monitoring
+ interface found in X370/X470/B450/X399 ASUS motherboards. This driver
+ will provide readings of fans, voltages and temperatures through the system
+ firmware.
+
+ This driver can also be built as a module. If so, the module
+ will be called asus_wmi_sensors.
+
config SENSORS_ASUS_WMI_EC
tristate "ASUS WMI B550/X570"
help
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index aae2ff5c7335..656a6191a0f8 100644
--- a/drivers/hwmon/Makefile
+++ b/drivers/hwmon/Makefile
@@ -9,6 +9,7 @@ obj-$(CONFIG_HWMON_VID) += hwmon-vid.o
# APCI drivers
obj-$(CONFIG_SENSORS_ACPI_POWER) += acpi_power_meter.o
obj-$(CONFIG_SENSORS_ATK0110) += asus_atk0110.o
+obj-$(CONFIG_SENSORS_ASUS_WMI) += asus_wmi_sensors.o
obj-$(CONFIG_SENSORS_ASUS_WMI_EC) += asus_wmi_ec_sensors.o

# Native drivers
diff --git a/drivers/hwmon/asus_wmi_sensors.c b/drivers/hwmon/asus_wmi_sensors.c
new file mode 100644
index 000000000000..792872b068d7
--- /dev/null
+++ b/drivers/hwmon/asus_wmi_sensors.c
@@ -0,0 +1,661 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * HWMON driver for ASUS motherboards that provides sensor readouts via WMI
+ * interface present in the UEFI of the X370/X470/B450/X399 Ryzen motherboards.
+ *
+ * Copyright (C) 2021 Eugene Shalygin <eugene.shalygin@gmail.com>
+ * Copyright (C) 2018-2019 Ed Brindley <kernel@maidavale.org>
+ *
+ * WMI interface provided:
+ * CPU Core Voltage,
+ * CPU SOC Voltage,
+ * DRAM Voltage,
+ * VDDP Voltage,
+ * 1.8V PLL Voltage,
+ * +12V Voltage,
+ * +5V Voltage,
+ * 3VSB Voltage,
+ * VBAT Voltage,
+ * AVCC3 Voltage,
+ * SB 1.05V Voltage,
+ * CPU Core Voltage,
+ * CPU SOC Voltage,
+ * DRAM Voltage,
+ * CPU Fan,
+ * Chassis Fan 1,
+ * Chassis Fan 2,
+ * Chassis Fan 3,
+ * HAMP Fan,
+ * Water Pump,
+ * CPU OPT,
+ * Water Flow,
+ * AIO Pump,
+ * CPU Temperature,
+ * CPU Socket Temperature,
+ * Motherboard Temperature,
+ * Chipset Temperature,
+ * Tsensor 1 Temperature,
+ * CPU VRM Temperature,
+ * Water In,
+ * Water Out,
+ * CPU VRM Output Current.
+ */
+#include <linux/acpi.h>
+#include <linux/dmi.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/init.h>
+#include <linux/jiffies.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+#include <linux/units.h>
+#include <linux/wmi.h>
+
+#define ASUSWMI_MONITORING_GUID "466747A0-70EC-11DE-8A39-0800200C9A66"
+#define ASUSWMI_METHODID_GET_VALUE 0x52574543
+#define ASUSWMI_METHODID_UPDATE_BUFFER 0x51574543
+#define ASUSWMI_METHODID_GET_INFO 0x50574543
+#define ASUSWMI_METHODID_GET_NUMBER 0x50574572
+#define ASUSWMI_METHODID_GET_VERSION 0x50574574
+
+#define ASUS_WMI_MAX_STR_SIZE 32
+
+/* boards with wmi sensors support */
+static const char *const asus_wmi_boards_names[] = {
+ "ROG CROSSHAIR VI HERO",
+ "PRIME X399-A",
+ "PRIME X470-PRO",
+ "ROG CROSSHAIR VI EXTREME",
+ "ROG CROSSHAIR VI HERO (WI-FI AC)",
+ "ROG CROSSHAIR VII HERO",
+ "ROG CROSSHAIR VII HERO (WI-FI)",
+ "ROG STRIX B450-E GAMING",
+ "ROG STRIX B450-F GAMING",
+ "ROG STRIX B450-I GAMING",
+ "ROG STRIX X399-E GAMING",
+ "ROG STRIX X470-F GAMING",
+ "ROG STRIX X470-I GAMING",
+ "ROG ZENITH EXTREME",
+ "ROG ZENITH EXTREME ALPHA",
+};
+
+enum asus_wmi_sensor_class {
+ VOLTAGE = 0x0,
+ TEMPERATURE_C = 0x1,
+ FAN_RPM = 0x2,
+ CURRENT = 0x3,
+ WATER_FLOW = 0x4,
+};
+
+enum asus_wmi_location {
+ CPU = 0x0,
+ CPU_SOC = 0x1,
+ DRAM = 0x2,
+ MOTHERBOARD = 0x3,
+ CHIPSET = 0x4,
+ AUX = 0x5,
+ VRM = 0x6,
+ COOLER = 0x7
+};
+
+enum asus_wmi_type {
+ SIGNED_INT = 0x0,
+ UNSIGNED_INT = 0x1,
+ SCALED = 0x3,
+};
+
+enum asus_wmi_source {
+ SIO = 0x1,
+ EC = 0x2
+};
+
+static enum hwmon_sensor_types asus_data_types[] = {
+ [VOLTAGE] = hwmon_in,
+ [TEMPERATURE_C] = hwmon_temp,
+ [FAN_RPM] = hwmon_fan,
+ [CURRENT] = hwmon_curr,
+ [WATER_FLOW] = hwmon_fan,
+};
+
+static u32 hwmon_attributes[] = {
+ [hwmon_chip] = HWMON_C_REGISTER_TZ,
+ [hwmon_temp] = HWMON_T_INPUT | HWMON_T_LABEL,
+ [hwmon_in] = HWMON_I_INPUT | HWMON_I_LABEL,
+ [hwmon_curr] = HWMON_C_INPUT | HWMON_C_LABEL,
+ [hwmon_fan] = HWMON_F_INPUT | HWMON_F_LABEL,
+};
+
+/**
+ * struct asus_wmi_sensor_info - sensor info.
+ * @id: sensor id.
+ * @data_type: sensor class e.g. voltage, temp etc.
+ * @location: sensor location.
+ * @name: sensor name.
+ * @source: sensor source.
+ * @type: sensor type signed, unsigned etc.
+ * @cached_value: cached sensor value.
+ */
+struct asus_wmi_sensor_info {
+ u32 id;
+ int data_type;
+ int location;
+ char name[ASUS_WMI_MAX_STR_SIZE];
+ int source;
+ int type;
+ u32 cached_value;
+};
+
+struct asus_wmi_wmi_info {
+ u8 buffer;
+ unsigned long source_last_updated[3]; /* in jiffies */
+ u8 sensor_count;
+
+ const struct asus_wmi_sensor_info **info[hwmon_max];
+ struct asus_wmi_sensor_info **info_by_id;
+};
+
+struct asus_wmi_sensors {
+ /* lock access to instrnal cache */
+ struct mutex lock;
+ struct asus_wmi_wmi_info wmi;
+
+ int wmi_board;
+};
+
+struct asus_wmi_data {
+ int wmi_board;
+ int wmi_count;
+};
+
+/*
+ * Universal method for calling WMI method
+ */
+static int asus_wmi_call_method(u32 method_id, u32 *args, struct acpi_buffer *output)
+{
+ struct acpi_buffer input = {(acpi_size) sizeof(*args), args };
+ acpi_status status;
+
+ status = wmi_evaluate_method(ASUSWMI_MONITORING_GUID, 0, method_id, &input, output);
+ if (ACPI_FAILURE(status))
+ return -EIO;
+
+ return 0;
+}
+
+/*
+ * Gets the version of the ASUS sensors interface implemented
+ */
+static int asus_wmi_get_version(u32 *version)
+{
+ struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
+ u32 args[] = {0, 0, 0};
+ union acpi_object *obj;
+ int err;
+
+ err = asus_wmi_call_method(ASUSWMI_METHODID_GET_VERSION, args, &output);
+ if (err)
+ return err;
+
+ obj = output.pointer;
+ if (!obj || obj->type != ACPI_TYPE_INTEGER)
+ return -EIO;
+
+ *version = obj->integer.value;
+
+ return 0;
+}
+
+/*
+ * Gets the number of sensor items
+ */
+static int asus_wmi_get_item_count(u32 *count)
+{
+ struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
+ u32 args[] = {0, 0, 0};
+ union acpi_object *obj;
+ int err;
+
+ err = asus_wmi_call_method(ASUSWMI_METHODID_GET_NUMBER, args, &output);
+ if (err)
+ return err;
+
+ obj = output.pointer;
+ if (!obj || obj->type != ACPI_TYPE_INTEGER)
+ return -EIO;
+
+ *count = obj->integer.value;
+
+ return 0;
+}
+
+static int asus_wmi_hwmon_add_chan_info(struct hwmon_channel_info *asus_wmi_hwmon_chan,
+ struct device *dev, int num,
+ enum hwmon_sensor_types type, u32 config)
+{
+ u32 *cfg;
+
+ cfg = devm_kcalloc(dev, num + 1, sizeof(*cfg), GFP_KERNEL);
+ if (!cfg)
+ return -ENOMEM;
+
+ asus_wmi_hwmon_chan->type = type;
+ asus_wmi_hwmon_chan->config = cfg;
+ memset32(cfg, config, num);
+
+ return 0;
+}
+
+/*
+ * For a given sensor item returns details e.g. type (voltage/temperature/fan speed etc), bank etc
+ */
+static int asus_wmi_sensor_info(int index, struct asus_wmi_sensor_info *s)
+{
+ union acpi_object name_obj, data_type_obj, location_obj, source_obj, type_obj;
+ struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
+ u32 args[] = {index, 0};
+ union acpi_object *obj;
+ int err;
+
+ err = asus_wmi_call_method(ASUSWMI_METHODID_GET_INFO, args, &output);
+ if (err)
+ return err;
+
+ s->id = index;
+
+ obj = output.pointer;
+ if (!obj || obj->type != ACPI_TYPE_PACKAGE)
+ return -EIO;
+
+ if (obj->package.count != 5)
+ return 1;
+
+ name_obj = obj->package.elements[0];
+
+ if (name_obj.type != ACPI_TYPE_STRING)
+ return 1;
+
+ strncpy(s->name, name_obj.string.pointer, sizeof(s->name) - 1);
+
+ data_type_obj = obj->package.elements[1];
+
+ if (data_type_obj.type != ACPI_TYPE_INTEGER)
+ return 1;
+
+ s->data_type = data_type_obj.integer.value;
+
+ location_obj = obj->package.elements[2];
+
+ if (location_obj.type != ACPI_TYPE_INTEGER)
+ return 1;
+
+ s->location = location_obj.integer.value;
+
+ source_obj = obj->package.elements[3];
+
+ if (source_obj.type != ACPI_TYPE_INTEGER)
+ return 1;
+
+ s->source = source_obj.integer.value;
+
+ type_obj = obj->package.elements[4];
+
+ if (type_obj.type != ACPI_TYPE_INTEGER)
+ return 1;
+
+ s->type = type_obj.integer.value;
+
+ return 0;
+}
+
+static int asus_wmi_update_buffer(u8 source)
+{
+ u32 args[] = {source, 0};
+ struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
+
+ return asus_wmi_call_method(ASUSWMI_METHODID_UPDATE_BUFFER, args, &output);
+}
+
+static int asus_wmi_get_sensor_value(u8 index, u32 *value)
+{
+ struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
+ u32 args[] = {index, 0};
+ union acpi_object *obj;
+ int err;
+
+ err = asus_wmi_call_method(ASUSWMI_METHODID_GET_VALUE, args, &output);
+ if (err)
+ return err;
+
+ obj = output.pointer;
+ if (!obj || obj->type != ACPI_TYPE_INTEGER)
+ return -EIO;
+
+ *value = obj->integer.value;
+
+ return 0;
+}
+
+static void asus_wmi_update_values_for_source(u8 source, struct asus_wmi_sensors *sensor_data)
+{
+ int ret = 0;
+ int value = 0;
+ int i;
+ struct asus_wmi_sensor_info *sensor;
+
+ for (i = 0; i < sensor_data->wmi.sensor_count; i++) {
+ sensor = sensor_data->wmi.info_by_id[i];
+ if (sensor && sensor->source == source) {
+ ret = asus_wmi_get_sensor_value(sensor->id, &value);
+ if (!ret)
+ sensor->cached_value = value;
+ }
+ }
+}
+
+static int asus_wmi_scale_sensor_value(u32 value, int data_type)
+{
+ /* FAN_RPM and WATER_FLOW don't need scaling */
+ switch (data_type) {
+ case VOLTAGE:
+ return DIV_ROUND_CLOSEST(value, 1000);
+ case TEMPERATURE_C:
+ return value * 1000;
+ case CURRENT:
+ return value * 1000;
+ }
+ return value;
+}
+
+static int asus_wmi_get_cached_value_or_update(const struct asus_wmi_sensor_info *sensor,
+ struct asus_wmi_sensors *sensor_data,
+ u32 *value)
+{
+ int ret;
+
+ if (time_after(jiffies, sensor_data->wmi.source_last_updated[sensor->source] + HZ)) {
+ ret = asus_wmi_update_buffer(sensor->source);
+ if (ret)
+ return -EIO;
+
+ sensor_data->wmi.buffer = sensor->source;
+
+ asus_wmi_update_values_for_source(sensor->source, sensor_data);
+ sensor_data->wmi.source_last_updated[sensor->source] = jiffies;
+ }
+
+ *value = sensor->cached_value;
+ return 0;
+}
+
+/*
+ * Now follow the functions that implement the hwmon interface
+ */
+
+static int asus_wmi_hwmon_read(struct device *dev, enum hwmon_sensor_types type,
+ u32 attr, int channel, long *val)
+{
+ int ret;
+ u32 value = 0;
+ const struct asus_wmi_sensor_info *sensor;
+
+ struct asus_wmi_sensors *sensor_data = dev_get_drvdata(dev);
+
+ sensor = *(sensor_data->wmi.info[type] + channel);
+
+ mutex_lock(&sensor_data->lock);
+
+ ret = asus_wmi_get_cached_value_or_update(sensor, sensor_data, &value);
+ mutex_unlock(&sensor_data->lock);
+
+ if (!ret)
+ *val = asus_wmi_scale_sensor_value(value, sensor->data_type);
+
+ return ret;
+}
+
+static int asus_wmi_hwmon_read_string(struct device *dev,
+ enum hwmon_sensor_types type, u32 attr,
+ int channel, const char **str)
+{
+ const struct asus_wmi_sensor_info *sensor;
+ struct asus_wmi_sensors *sensor_data = dev_get_drvdata(dev);
+
+ sensor = *(sensor_data->wmi.info[type] + channel);
+ *str = sensor->name;
+
+ return 0;
+}
+
+static umode_t asus_wmi_hwmon_is_visible(const void *drvdata,
+ enum hwmon_sensor_types type, u32 attr,
+ int channel)
+{
+ const struct asus_wmi_sensor_info *sensor;
+ const struct asus_wmi_sensors *sensor_data = drvdata;
+
+ sensor = *(sensor_data->wmi.info[type] + channel);
+ if (sensor && sensor->name)
+ return 0444;
+
+ return 0;
+}
+
+static const struct hwmon_ops asus_wmi_hwmon_ops = {
+ .is_visible = asus_wmi_hwmon_is_visible,
+ .read = asus_wmi_hwmon_read,
+ .read_string = asus_wmi_hwmon_read_string,
+};
+
+static struct hwmon_chip_info asus_wmi_chip_info = {
+ .ops = &asus_wmi_hwmon_ops,
+ .info = NULL,
+};
+
+static int asus_wmi_configure_sensor_setup(struct platform_device *pdev,
+ struct asus_wmi_sensors *sensor_data)
+{
+ int err;
+ int i, idx;
+ int nr_count[hwmon_max] = {0}, nr_types = 0;
+ struct device *hwdev;
+ struct device *dev = &pdev->dev;
+ struct hwmon_channel_info *asus_wmi_hwmon_chan;
+ struct asus_wmi_sensor_info *temp_sensor;
+ enum hwmon_sensor_types type;
+ const struct hwmon_channel_info **ptr_asus_wmi_ci;
+ const struct hwmon_chip_info *chip_info;
+
+ sensor_data->wmi.buffer = -1;
+ temp_sensor = devm_kcalloc(dev, 1, sizeof(*temp_sensor), GFP_KERNEL);
+ if (!temp_sensor)
+ return -ENOMEM;
+
+ for (i = 0; i < sensor_data->wmi.sensor_count; i++) {
+ err = asus_wmi_sensor_info(i, temp_sensor);
+ if (err)
+ return -EINVAL;
+
+ switch (temp_sensor->data_type) {
+ case TEMPERATURE_C:
+ case VOLTAGE:
+ case CURRENT:
+ case FAN_RPM:
+ case WATER_FLOW:
+ type = asus_data_types[temp_sensor->data_type];
+ if (!nr_count[type])
+ nr_types++;
+ nr_count[type]++;
+ break;
+ }
+ }
+
+ if (nr_count[hwmon_temp])
+ nr_count[hwmon_chip]++, nr_types++;
+
+ asus_wmi_hwmon_chan = devm_kcalloc(dev, nr_types,
+ sizeof(*asus_wmi_hwmon_chan),
+ GFP_KERNEL);
+ if (!asus_wmi_hwmon_chan)
+ return -ENOMEM;
+
+ ptr_asus_wmi_ci = devm_kcalloc(dev, nr_types + 1,
+ sizeof(*ptr_asus_wmi_ci), GFP_KERNEL);
+ if (!ptr_asus_wmi_ci)
+ return -ENOMEM;
+
+ asus_wmi_chip_info.info = ptr_asus_wmi_ci;
+ chip_info = &asus_wmi_chip_info;
+
+ sensor_data->wmi.info_by_id = devm_kcalloc(dev, sensor_data->wmi.sensor_count,
+ sizeof(*sensor_data->wmi.info_by_id),
+ GFP_KERNEL);
+
+ if (!sensor_data->wmi.info_by_id)
+ return -ENOMEM;
+
+ for (type = 0; type < hwmon_max; type++) {
+ if (!nr_count[type])
+ continue;
+
+ asus_wmi_hwmon_add_chan_info(asus_wmi_hwmon_chan, dev,
+ nr_count[type], type,
+ hwmon_attributes[type]);
+ *ptr_asus_wmi_ci++ = asus_wmi_hwmon_chan++;
+
+ sensor_data->wmi.info[type] = devm_kcalloc(dev,
+ nr_count[type],
+ sizeof(*sensor_data->wmi.info),
+ GFP_KERNEL);
+ if (!sensor_data->wmi.info[type])
+ return -ENOMEM;
+ }
+
+ for (i = sensor_data->wmi.sensor_count - 1; i >= 0 ; i--) {
+ temp_sensor = devm_kzalloc(dev, sizeof(*temp_sensor), GFP_KERNEL);
+ if (!temp_sensor)
+ return -ENOMEM;
+
+ err = asus_wmi_sensor_info(i, temp_sensor);
+ if (err)
+ continue;
+
+ switch (temp_sensor->data_type) {
+ case TEMPERATURE_C:
+ case VOLTAGE:
+ case CURRENT:
+ case FAN_RPM:
+ case WATER_FLOW:
+ type = asus_data_types[temp_sensor->data_type];
+ idx = --nr_count[type];
+ *(sensor_data->wmi.info[type] + idx) = temp_sensor;
+ sensor_data->wmi.info_by_id[i] = temp_sensor;
+ break;
+ }
+ }
+
+ dev_dbg(&pdev->dev, "%s board has %d sensors",
+ asus_wmi_boards_names[sensor_data->wmi_board],
+ sensor_data->wmi.sensor_count);
+
+ hwdev = devm_hwmon_device_register_with_info(dev, KBUILD_MODNAME,
+ sensor_data, chip_info, NULL);
+
+ return PTR_ERR_OR_ZERO(hwdev);
+}
+
+static int asus_wmi_probe(struct platform_device *pdev)
+{
+ struct asus_wmi_sensors *sensor_data;
+ struct device *dev = &pdev->dev;
+ struct asus_wmi_data *data;
+
+ data = dev_get_platdata(dev);
+
+ sensor_data = devm_kzalloc(dev, sizeof(struct asus_wmi_sensors),
+ GFP_KERNEL);
+ if (!sensor_data)
+ return -ENOMEM;
+
+ mutex_init(&sensor_data->lock);
+ sensor_data->wmi_board = data->wmi_board;
+ sensor_data->wmi.sensor_count = data->wmi_count;
+
+ platform_set_drvdata(pdev, sensor_data);
+
+ return asus_wmi_configure_sensor_setup(pdev,
+ sensor_data);
+ return 0;
+}
+
+static struct platform_driver asus_wmi_sensors_platform_driver = {
+ .driver = {
+ .name = "asus-wmi-sensors",
+ },
+ .probe = asus_wmi_probe,
+};
+
+static struct platform_device *sensors_pdev;
+
+static int __init asus_wmi_init(void)
+{
+ const char *board_vendor, *board_name;
+ u32 version = 0;
+ struct asus_wmi_data data;
+
+ data.wmi_board = -1;
+ data.wmi_count = 0;
+
+ board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
+ board_name = dmi_get_system_info(DMI_BOARD_NAME);
+
+ if (board_vendor && board_name &&
+ !strcmp(board_vendor, "ASUSTeK COMPUTER INC.")) {
+ if (!wmi_has_guid(ASUSWMI_MONITORING_GUID))
+ return -ENODEV;
+
+ data.wmi_board = match_string(asus_wmi_boards_names,
+ ARRAY_SIZE(asus_wmi_boards_names),
+ board_name);
+
+ if (data.wmi_board >= 0) {
+ if (asus_wmi_get_item_count(&data.wmi_count))
+ return -ENODEV;
+
+ if (asus_wmi_get_version(&version))
+ return -ENODEV;
+
+ if (data.wmi_count <= 0 || version < 2) {
+ pr_err("Board: %s WMI wmi version: %u with %d sensors is unsupported\n",
+ board_name, version, data.wmi_count);
+
+ data.wmi_board = -ENODEV;
+ }
+ }
+ }
+
+ /* Nothing to support */
+ if (data.wmi_board < 0)
+ return -ENODEV;
+
+ sensors_pdev = platform_create_bundle(&asus_wmi_sensors_platform_driver,
+ asus_wmi_probe,
+ NULL, 0,
+ &data, sizeof(struct asus_wmi_data));
+
+ return PTR_ERR_OR_ZERO(sensors_pdev);
+}
+module_init(asus_wmi_init);
+
+static void __exit asus_wmi_exit(void)
+{
+ platform_device_unregister(sensors_pdev);
+ platform_driver_unregister(&asus_wmi_sensors_platform_driver);
+}
+module_exit(asus_wmi_exit);
+
+MODULE_AUTHOR("Ed Brindley <kernel@maidavale.org>");
+MODULE_AUTHOR("Eugene Shalygin <eugene.shalygin@gmail.com>");
+MODULE_DESCRIPTION("Asus WMI Sensors Driver");
+MODULE_LICENSE("GPL");
--
2.33.0