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

Guenter Roeck
2021-10-07T16:45:36Z

On 10/6/21 3:25 PM, Denis Pauk wrote:
> 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 +++++++++++++++++++++++++++++++

New drivers also need to be documented in Documentation/hwmon/.

How does this differ from the hwmon device instantiated from
drivers/platform/x86/asus-wmi.c ?

Guenter

> 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");
>