4 files changed, 651 insertions(+), 1 deletion(-)
create mode 100644 drivers/hwmon/asus_wmi_ec_sensors.c
diff --git a/MAINTAINERS b/MAINTAINERS
index bae3f62f548f..bc2e981a54e2 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2937,6 +2937,13 @@ W: http://acpi4asus.sf.net
F: drivers/platform/x86/asus*.c
F: drivers/platform/x86/eeepc*.c
+ASUS WMI HARDWARE MONITOR DRIVER
+M: Eugene Shalygin <eugene.shalygin@xxxxxxxxx>
+M: Denis Pauk <pauk.denis@xxxxxxxxx>
+L: linux-hwmon@xxxxxxxxxxxxxxx
+S: Maintained
+F: drivers/hwmon/asus_wmi_ec_sensors.c
+
ASUS WIRELESS RADIO CONTROL DRIVER
M: João Paulo Rechi Vita <jprvita@xxxxxxxxx>
L: platform-driver-x86@xxxxxxxxxxxxxxx
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 7fde4c6e1e7f..b7107721a401 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -1840,7 +1840,7 @@ config SENSORS_ADS7871
config SENSORS_AMC6821
tristate "Texas Instruments AMC6821"
- depends on I2C
+ depends on I2C
help
If you say yes here you get support for the Texas Instruments
AMC6821 hardware monitoring chips.
@@ -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_EC
+ tristate "ASUS WMI B550/X570"
+ help
+ If you say yes here you get support for the ACPI embedded controller
+ hardware monitoring interface found in B550/X570 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_ec.
+
endif # ACPI
endif # HWMON
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index baee6a8d4dd1..aae2ff5c7335 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_EC) += asus_wmi_ec_sensors.o
# Native drivers
# asb100, then w83781d go first, as they can override other drivers' addresses.
diff --git a/drivers/hwmon/asus_wmi_ec_sensors.c b/drivers/hwmon/asus_wmi_ec_sensors.c
new file mode 100644
index 000000000000..553d9ee8656d
--- /dev/null
+++ b/drivers/hwmon/asus_wmi_ec_sensors.c
@@ -0,0 +1,631 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * HWMON driver for ASUS B550/X570 motherboards that publish sensor
+ * values via the embedded controller registers.
+ *
+ * Copyright (C) 2021 Eugene Shalygin <eugene.shalygin@xxxxxxxxx>
+ * Copyright (C) 2018-2019 Ed Brindley <kernel@xxxxxxxxxxxxx>
+ *
+ * EC provided:
+ * Chipset temperature,
+ * CPU temperature,
+ * Motherboard temperature,
+ * T_Sensor temperature,
+ * VRM temperature,
+ * Water In temperature,
+ * Water Out temperature,
+ * CPU Optional Fan,
+ * Chipset fan,
+ * Water Flow fan,
+ * CPU current.
+ *
+ */
+#include <asm/unaligned.h>
+#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/nls.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_BLOCK_READ_EC 0x42524543 /* BREC */
+
+#define ASUS_WMI_BLOCK_READ_REGISTERS_MAX 0x10 /* from the ASUS DSDT source */
+/* from the ASUS_WMI_BLOCK_READ_REGISTERS_MAX value */
+#define ASUS_WMI_MAX_BUF_LEN 0x80
+#define MAX_SENSOR_LABEL_LENGTH 0x10
+
+enum asus_wmi_ec_board {
+ BOARD_PW_X570_A, /* Pro WS X570-ACE */
+ BOARD_R_C8H, /* ROG Crosshair VIII Hero */
+ BOARD_R_C8DH, /* ROG Crosshair VIII Dark Hero */
+ BOARD_R_C8F, /* ROG Crosshair VIII Formula */
+ BOARD_RS_B550_E_G, /* ROG STRIX B550-E GAMING */
+ BOARD_RS_X570_E_G, /* ROG STRIX X570-E GAMING */
+ BOARD_MAX
+};
+
+/* boards with EC support */
+static const char *const asus_wmi_ec_boards_names[] = {
+ [BOARD_PW_X570_A] = "Pro WS X570-ACE",
+ [BOARD_R_C8H] = "ROG CROSSHAIR VIII HERO",
+ [BOARD_R_C8DH] = "ROG CROSSHAIR VIII DARK HERO",
+ [BOARD_R_C8F] = "ROG CROSSHAIR VIII FORMULA",
+ [BOARD_RS_B550_E_G] = "ROG STRIX B550-E GAMING",
+ [BOARD_RS_X570_E_G] = "ROG STRIX X570-E GAMING",
+};
+
+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_ec_sensor_address {
+ u8 index;
+ u8 bank;
+ u8 size;
+};
+
+#define MAKE_SENSOR_ADDRESS(size_i, bank_i, index_i) \
+ { .size = size_i,\
+ .bank = bank_i,\
+ .index = index_i}
+
+struct ec_sensor_info {
+ char label[MAX_SENSOR_LABEL_LENGTH];
+ enum hwmon_sensor_types type;
+ struct asus_wmi_ec_sensor_address addr;
+};
+
+#define EC_SENSOR(sensor_label, sensor_type, size, bank, index) \
+ { .label = sensor_label,\
+ .type = sensor_type, \
+ .addr = MAKE_SENSOR_ADDRESS(size, bank, index) \
+ }
+
+enum known_ec_sensor {
+ SENSOR_TEMP_CHIPSET,
+ SENSOR_TEMP_CPU,
+ SENSOR_TEMP_MB,
+ SENSOR_TEMP_T_SENSOR,
+ SENSOR_TEMP_VRM,
+ SENSOR_FAN_CPU_OPT,
+ SENSOR_FAN_CHIPSET,
+ SENSOR_FAN_WATER_FLOW,
+ SENSOR_CURR_CPU,
+ SENSOR_TEMP_WATER_IN,
+ SENSOR_TEMP_WATER_OUT,
+ SENSOR_MAX
+};
+
+/*
+ * Array of the all known sensors for ASUS EC controllers
+ */
+static const struct ec_sensor_info known_ec_sensors[] = {
+ [SENSOR_TEMP_CHIPSET] = EC_SENSOR("Chipset", hwmon_temp, 1, 0x00, 0x3a),
+ [SENSOR_TEMP_CPU] = EC_SENSOR("CPU", hwmon_temp, 1, 0x00, 0x3b),
+ [SENSOR_TEMP_MB] = EC_SENSOR("Motherboard", hwmon_temp, 1, 0x00, 0x3c),
+ [SENSOR_TEMP_T_SENSOR] = EC_SENSOR("T_Sensor", hwmon_temp, 1, 0x00, 0x3d),
+ [SENSOR_TEMP_VRM] = EC_SENSOR("VRM", hwmon_temp, 1, 0x00, 0x3e),
+ [SENSOR_FAN_CPU_OPT] = EC_SENSOR("CPU_Opt", hwmon_fan, 2, 0x00, 0xb0),
+ [SENSOR_FAN_CHIPSET] = EC_SENSOR("Chipset", hwmon_fan, 2, 0x00, 0xb4),
+ [SENSOR_FAN_WATER_FLOW] = EC_SENSOR("Water_Flow", hwmon_fan, 2, 0x00, 0xbc),
+ [SENSOR_CURR_CPU] = EC_SENSOR("CPU", hwmon_curr, 1, 0x00, 0xf4),
+ [SENSOR_TEMP_WATER_IN] = EC_SENSOR("Water_In", hwmon_temp, 1, 0x01, 0x00),
+ [SENSOR_TEMP_WATER_OUT] = EC_SENSOR("Water_Out", hwmon_temp, 1, 0x01, 0x01),
+};
+
+static const enum known_ec_sensor known_board_sensors[BOARD_MAX][SENSOR_MAX + 1] = {
+ [BOARD_PW_X570_A] = {
+ SENSOR_TEMP_CHIPSET, SENSOR_TEMP_CPU, SENSOR_TEMP_MB, SENSOR_TEMP_VRM,
+ SENSOR_FAN_CHIPSET,
+ SENSOR_MAX
+ },
+ [BOARD_R_C8H] = {
+ SENSOR_TEMP_CHIPSET, SENSOR_TEMP_CPU, SENSOR_TEMP_MB,
+ SENSOR_TEMP_T_SENSOR, SENSOR_TEMP_VRM,
+ SENSOR_TEMP_WATER_IN, SENSOR_TEMP_WATER_OUT,
+ SENSOR_FAN_CPU_OPT, SENSOR_FAN_CHIPSET, SENSOR_FAN_WATER_FLOW,
+ SENSOR_CURR_CPU,
+ SENSOR_MAX
+ },
+ [BOARD_R_C8DH] = { /* Same as Hero but without chipset fan */
+ SENSOR_TEMP_CHIPSET, SENSOR_TEMP_CPU, SENSOR_TEMP_MB,
+ SENSOR_TEMP_T_SENSOR, SENSOR_TEMP_VRM,
+ SENSOR_TEMP_WATER_IN, SENSOR_TEMP_WATER_OUT,
+ SENSOR_FAN_CPU_OPT, SENSOR_FAN_WATER_FLOW,
+ SENSOR_CURR_CPU,
+ SENSOR_MAX
+ },
+ [BOARD_R_C8F] = { /* Same as Hero but without water */
+ SENSOR_TEMP_CHIPSET, SENSOR_TEMP_CPU, SENSOR_TEMP_MB,
+ SENSOR_TEMP_T_SENSOR, SENSOR_TEMP_VRM,
+ SENSOR_FAN_CPU_OPT, SENSOR_FAN_CHIPSET,
+ SENSOR_CURR_CPU,
+ SENSOR_MAX
+ },
+ [BOARD_RS_B550_E_G] = {
+ SENSOR_TEMP_CHIPSET, SENSOR_TEMP_CPU, SENSOR_TEMP_MB,
+ SENSOR_TEMP_T_SENSOR, SENSOR_TEMP_VRM,
+ SENSOR_FAN_CPU_OPT,
+ SENSOR_CURR_CPU,
+ SENSOR_MAX
+ },
+ [BOARD_RS_X570_E_G] = {
+ SENSOR_TEMP_CHIPSET, SENSOR_TEMP_CPU, SENSOR_TEMP_MB,
+ SENSOR_TEMP_T_SENSOR, SENSOR_TEMP_VRM,
+ SENSOR_FAN_CHIPSET,
+ SENSOR_MAX
+ },
+};
+
+struct ec_sensor {
+ enum known_ec_sensor info_index;
+ u32 cached_value;
+};
+
+/**
+ * struct asus_wmi_ec_info - sensor info.
+ * @sensors: list of sensors.
+ * @read_arg: UTF-16 string to pass to BRxx() WMI function.
+ * @read_buffer: WMI function output.
+ * @nr_sensors: number of board EC sensors.
+ * @nr_registers: number of EC registers to read (sensor might span more than
+ * 1 register).
+ * @last_updated: in jiffies.
+ */
+struct asus_wmi_ec_info {
+ struct ec_sensor sensors[SENSOR_MAX];
+ char read_arg[((ASUS_WMI_BLOCK_READ_REGISTERS_MAX * 4) + 1) * 2];
+ u8 read_buffer[ASUS_WMI_BLOCK_READ_REGISTERS_MAX];
+ unsigned int nr_sensors;
+ unsigned int nr_registers;
+ unsigned long last_updated;
+};
+
+struct asus_wmi_sensors {
+ /* lock access to instrnal cache */
+ struct mutex lock;
+ struct asus_wmi_ec_info ec;
+
+ int ec_board;
+};
+
+struct asus_wmi_data {
+ int ec_board;
+};
+
+static void asus_wmi_ec_fill_board_sensors(struct asus_wmi_ec_info *ec, int board)
+{
+ const enum known_ec_sensor *bsi = known_board_sensors[board];
+ struct ec_sensor *s = ec->sensors;
+ int i;
+
+ ec->nr_sensors = 0;
+ ec->nr_registers = 0;
+
+ for (i = 0; i < SENSOR_MAX && bsi[i] != SENSOR_MAX; i++) {
+ s[i].info_index = bsi[i];
+ s[i].cached_value = 0;
+ ec->nr_sensors++;
+ ec->nr_registers += known_ec_sensors[bsi[i]].addr.size;
+ }
+}
+
+/*
+ * The next four functions converts to/from BRxx string argument format
+ * The format of the string is as follows:
+ * The string consists of two-byte UTF-16 characters
+ * The value of the very first byte int the string is equal to the total length
+ * of the next string in bytes, thus excluding the first two-byte character
+ * The rest of the string encodes pairs of (bank, index) pairs, where both
+ * values are byte-long (0x00 to 0xFF)
+ * Numbers are encoded as UTF-16 hex values
+ */
+static void asus_wmi_ec_decode_reply_buffer(const u8 *inp, u8 *out)
+{
+ unsigned int len = ACPI_MIN(ASUS_WMI_MAX_BUF_LEN, inp[0] / 4);
+ char buffer[ASUS_WMI_MAX_BUF_LEN * 2];
+ const char *pos = buffer;
+ const u8 *data = inp + 2;
+ unsigned int i;
+
+ utf16s_to_utf8s((wchar_t *)data, len * 2, UTF16_LITTLE_ENDIAN, buffer, len * 2);
+
+ for (i = 0; i < len; i++, pos += 2)
+ out[i] = (hex_to_bin(pos[0]) << 4) + hex_to_bin(pos[1]);
+}
+
+static void asus_wmi_ec_encode_registers(u16 *registers, u8 len, char *out)
+{
+ char buffer[ASUS_WMI_MAX_BUF_LEN * 2];
+ char *pos = buffer;
+ unsigned int i;
+ u8 byte;
+
+ *out++ = len * 8;
+ *out++ = 0;
+
+ for (i = 0; i < len; i++) {
+ byte = registers[i] >> 8;
+ *pos = hex_asc_hi(byte);
+ pos++;
+ *pos = hex_asc_lo(byte);
+ pos++;
+ byte = registers[i];
+ *pos = hex_asc_hi(byte);
+ pos++;
+ *pos = hex_asc_lo(byte);
+ pos++;
+ }
+
+ utf8s_to_utf16s(buffer, len * 4, UTF16_LITTLE_ENDIAN, (wchar_t *)out, len * 4);
+}
+
+static void asus_wmi_ec_make_block_read_query(struct asus_wmi_ec_info *ec)
+{
+ u16 registers[ASUS_WMI_BLOCK_READ_REGISTERS_MAX];
+ const struct ec_sensor_info *si;
+ long i, j, register_idx = 0;
+
+ /*
+ * if we can get values for all the registers in a single query,
+ * the query will not change from call to call
+ */
+ if (ec->nr_registers <= ASUS_WMI_BLOCK_READ_REGISTERS_MAX &&
+ ec->read_arg[0] > 0) {
+ /* no need to update */
+ return;
+ }
+
+ for (i = 0; i < ec->nr_sensors; i++) {
+ si = &known_ec_sensors[ec->sensors[i].info_index];
+ for (j = 0; j < si->addr.size;
+ j++, register_idx++) {
+ registers[register_idx] = (si->addr.bank << 8) + si->addr.index + j;
+ }
+ }
+
+ asus_wmi_ec_encode_registers(registers, ec->nr_registers, ec->read_arg);
+}
+
+static int asus_wmi_ec_block_read(u32 method_id, char *query, u8 *out)
+{
+ struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER,
+ NULL };
+ struct acpi_buffer input;
+ union acpi_object *obj;
+ acpi_status status;
+
+ /* the first byte of the BRxx() argument string has to be the string size */
+ input.length = (acpi_size)query[0] + 2;
+ input.pointer = query;
+ status = wmi_evaluate_method(ASUSWMI_MONITORING_GUID, 0, method_id, &input,
+ &output);
+ if (ACPI_FAILURE(status))
+ return -EIO;
+
+ obj = output.pointer;
+ if (!obj || obj->type != ACPI_TYPE_BUFFER) {
+ if (!obj)
+ acpi_os_free(output.pointer);
+
+ return -EIO;
+ }
+ asus_wmi_ec_decode_reply_buffer(obj->buffer.pointer, out);
+ acpi_os_free(output.pointer);
+ return 0;
+}
+
+static int asus_wmi_ec_update_ec_sensors(struct asus_wmi_ec_info *ec)
+{
+ const struct ec_sensor_info *si;
+ struct ec_sensor *s;
+
+ u32 value;
+ int status;
+ u8 i_sensor, read_reg_ct;
+
+ asus_wmi_ec_make_block_read_query(ec);
+ status = asus_wmi_ec_block_read(ASUSWMI_METHODID_BLOCK_READ_EC,
+ ec->read_arg,
+ ec->read_buffer);
+ if (status)
+ return status;
+
+ read_reg_ct = 0;
+ for (i_sensor = 0; i_sensor < ec->nr_sensors; i_sensor++) {
+ s = &ec->sensors[i_sensor];
+ si = &known_ec_sensors[s->info_index];
+
+ if (si->addr.size == 1)
+ value = ec->read_buffer[read_reg_ct];
+ else if (si->addr.size == 2)
+ value = get_unaligned_le16(&ec->read_buffer[read_reg_ct]);
+ else if (si->addr.size == 4)
+ value = get_unaligned_le32(&ec->read_buffer[read_reg_ct]);
+
+ read_reg_ct += si->addr.size;
+ s->cached_value = value;
+ }
+ return 0;
+}
+
+static int asus_wmi_ec_scale_sensor_value(u32 value, int data_type)
+{
+ switch (data_type) {
+ case hwmon_curr:
+ case hwmon_temp:
+ case hwmon_in:
+ return value * KILO;
+ default:
+ return value;
+ }
+}
+
+static int asus_wmi_ec_find_sensor_index(const struct asus_wmi_ec_info *ec,
+ enum hwmon_sensor_types type, int channel)
+{
+ int i;
+
+ for (i = 0; i < ec->nr_sensors; i++) {
+ if (known_ec_sensors[ec->sensors[i].info_index].type == type) {
+ if (channel == 0)
+ return i;
+
+ channel--;
+ }
+ }
+ return -EINVAL;
+}
+
+static int asus_wmi_ec_get_cached_value_or_update(int sensor_index,
+ struct asus_wmi_sensors *state,
+ u32 *value)
+{
+ int ret;
+
+ if (time_after(jiffies, state->ec.last_updated + HZ)) {
+ ret = asus_wmi_ec_update_ec_sensors(&state->ec);
+ if (ret)
+ return ret;
+
+ state->ec.last_updated = jiffies;
+ }
+
+ *value = state->ec.sensors[sensor_index].cached_value;
+ return 0;
+}
+
+/*
+ * Now follow the functions that implement the hwmon interface
+ */
+
+static int asus_wmi_ec_hwmon_read(struct device *dev, enum hwmon_sensor_types type,
+ u32 attr, int channel, long *val)
+{
+ struct asus_wmi_sensors *sensor_data = dev_get_drvdata(dev);
+ int ret, sidx, info_index;
+ u32 value = 0;
+
+ sidx = asus_wmi_ec_find_sensor_index(&sensor_data->ec, type, channel);
+ if (sidx < 0)
+ return sidx;
+
+ mutex_lock(&sensor_data->lock);
+ ret = asus_wmi_ec_get_cached_value_or_update(sidx, sensor_data, &value);
+ mutex_unlock(&sensor_data->lock);
+ if (ret)
+ return ret;
+
+ info_index = sensor_data->ec.sensors[sidx].info_index;
+ *val = asus_wmi_ec_scale_sensor_value(value,
+ known_ec_sensors[info_index].type);
+
+ return ret;
+}
+
+static int asus_wmi_ec_hwmon_read_string(struct device *dev,
+ enum hwmon_sensor_types type, u32 attr,
+ int channel, const char **str)
+{
+ struct asus_wmi_sensors *sensor_data = dev_get_drvdata(dev);
+ int sensor_index;
+
+ sensor_index = asus_wmi_ec_find_sensor_index(&sensor_data->ec, type, channel);
+ *str = known_ec_sensors[sensor_data->ec.sensors[sensor_index].info_index].label;
+
+ return 0;
+}
+
+static umode_t asus_wmi_ec_hwmon_is_visible(const void *drvdata,
+ enum hwmon_sensor_types type, u32 attr,
+ int channel)
+{
+ int index;
+ const struct asus_wmi_sensors *sensor_data = drvdata;
+
+ index = asus_wmi_ec_find_sensor_index(&sensor_data->ec, type, channel);
+
+ return index == 0xff ? 0 : 0444;
+}
+
+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;
+}
+
+static const struct hwmon_ops asus_wmi_ec_hwmon_ops = {
+ .is_visible = asus_wmi_ec_hwmon_is_visible,
+ .read = asus_wmi_ec_hwmon_read,
+ .read_string = asus_wmi_ec_hwmon_read_string,
+};
+
+static struct hwmon_chip_info asus_wmi_ec_chip_info = {
+ .ops = &asus_wmi_ec_hwmon_ops,
+};
+
+static int asus_wmi_ec_configure_sensor_setup(struct platform_device *pdev,
+ struct asus_wmi_sensors *sensor_data)
+{
+ struct hwmon_channel_info *asus_wmi_hwmon_chan;
+ const struct hwmon_channel_info **ptr_asus_wmi_ci;
+ int nr_count[hwmon_max] = { 0 }, nr_types = 0;
+ const struct hwmon_chip_info *chip_info;
+ struct device *dev = &pdev->dev;
+ const struct ec_sensor_info *si;
+ enum hwmon_sensor_types type;
+ struct device *hwdev;
+ int i;
+
+ asus_wmi_ec_fill_board_sensors(&sensor_data->ec, sensor_data->ec_board);
+
+ if (!sensor_data->ec.nr_sensors)
+ return -ENODEV;
+
+ for (i = 0; i < sensor_data->ec.nr_sensors; i++) {
+ si = &known_ec_sensors[sensor_data->ec.sensors[i].info_index];
+ if (!nr_count[si->type])
+ nr_types++;
+ nr_count[si->type]++;
+ }
+
+ 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_ec_chip_info.info = ptr_asus_wmi_ci;
+ chip_info = &asus_wmi_ec_chip_info;
+
+ 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++;
+ }
+
+ dev_dbg(&pdev->dev, "%s board has %d EC sensors that span %d registers",
+ asus_wmi_ec_boards_names[sensor_data->ec_board],
+ sensor_data->ec.nr_sensors,
+ sensor_data->ec.nr_registers);
+
+ 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->ec_board = data->ec_board;
+
+ platform_set_drvdata(pdev, sensor_data);
+
+ /* ec init */
+ return asus_wmi_ec_configure_sensor_setup(pdev,
+ sensor_data);
+}
+
+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;
+ struct asus_wmi_data data;
+
+ data.ec_board = -1;
+
+ 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.ec_board = match_string(asus_wmi_ec_boards_names,
+ ARRAY_SIZE(asus_wmi_ec_boards_names),
+ board_name);
+ }
+
+ /* Nothing to support */
+ if (data.ec_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@xxxxxxxxxxxxx>");
+MODULE_AUTHOR("Eugene Shalygin <eugene.shalygin@xxxxxxxxx>");
+MODULE_DESCRIPTION("Asus WMI Sensors Driver");
+MODULE_LICENSE("GPL");
