drivers/hwmon/asus_wmi_sensors.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * HWMON driver for ASUS motherboards that provides sensor readouts via WMI
   4  * interface present in the UEFI of the X370/X470/B450/X399 Ryzen motherboards.
   5  *
   6  * Copyright (C) 2018-2019 Ed Brindley <[email protected]>
   7  *
   8  * WMI interface provides:
   9  * - CPU Core Voltage,
  10  * - CPU SOC Voltage,
  11  * - DRAM Voltage,
  12  * - VDDP Voltage,
  13  * - 1.8V PLL Voltage,
  14  * - +12V Voltage,
  15  * - +5V Voltage,
  16  * - 3VSB Voltage,
  17  * - VBAT Voltage,
  18  * - AVCC3 Voltage,
  19  * - SB 1.05V Voltage,
  20  * - CPU Core Voltage,
  21  * - CPU SOC Voltage,
  22  * - DRAM Voltage,
  23  * - CPU Fan RPM,
  24  * - Chassis Fan 1 RPM,
  25  * - Chassis Fan 2 RPM,
  26  * - Chassis Fan 3 RPM,
  27  * - HAMP Fan RPM,
  28  * - Water Pump RPM,
  29  * - CPU OPT RPM,
  30  * - Water Flow RPM,
  31  * - AIO Pump RPM,
  32  * - CPU Temperature,
  33  * - CPU Socket Temperature,
  34  * - Motherboard Temperature,
  35  * - Chipset Temperature,
  36  * - Tsensor 1 Temperature,
  37  * - CPU VRM Temperature,
  38  * - Water In,
  39  * - Water Out,
  40  * - CPU VRM Output Current.
  41  */
  42
  43 #include <linux/acpi.h>
  44 #include <linux/dmi.h>
  45 #include <linux/hwmon.h>
  46 #include <linux/init.h>
  47 #include <linux/jiffies.h>
  48 #include <linux/kernel.h>
  49 #include <linux/module.h>
  50 #include <linux/mutex.h>
  51 #include <linux/units.h>
  52 #include <linux/wmi.h>
  53
  54 #define ASUSWMI_MONITORING_GUID         "466747A0-70EC-11DE-8A39-0800200C9A66"
  55 #define ASUSWMI_METHODID_GET_VALUE      0x52574543 /* RWEC */
  56 #define ASUSWMI_METHODID_UPDATE_BUFFER  0x51574543 /* QWEC */
  57 #define ASUSWMI_METHODID_GET_INFO       0x50574543 /* PWEC */
  58 #define ASUSWMI_METHODID_GET_NUMBER     0x50574572 /* PWEr */
  59 #define ASUSWMI_METHODID_GET_VERSION    0x50574574 /* PWEt */
  60
  61 #define ASUS_WMI_MAX_STR_SIZE           32
  62
  63 #define DMI_EXACT_MATCH_ASUS_BOARD_NAME(name) {                                 \
  64         .matches = {                                                            \
  65                 DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "ASUSTeK COMPUTER INC."),     \
  66                 DMI_EXACT_MATCH(DMI_BOARD_NAME, name),                          \
  67         },                                                                      \
  68 }
  69
  70 static const struct dmi_system_id asus_wmi_dmi_table[] = {
  71         DMI_EXACT_MATCH_ASUS_BOARD_NAME("PRIME X399-A"),
  72         DMI_EXACT_MATCH_ASUS_BOARD_NAME("PRIME X470-PRO"),
  73         DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG CROSSHAIR VI EXTREME"),
  74         DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG CROSSHAIR VI HERO"),
  75         DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG CROSSHAIR VI HERO (WI-FI AC)"),
  76         DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG CROSSHAIR VII HERO"),
  77         DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG CROSSHAIR VII HERO (WI-FI)"),
  78         DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG STRIX B450-E GAMING"),
  79         DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG STRIX B450-F GAMING"),
  80         DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG STRIX B450-I GAMING"),
  81         DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG STRIX X399-E GAMING"),
  82         DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG STRIX X470-F GAMING"),
  83         DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG STRIX X470-I GAMING"),
  84         DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG ZENITH EXTREME"),
  85         DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG ZENITH EXTREME ALPHA"),
  86         {}
  87 };
  88 MODULE_DEVICE_TABLE(dmi, asus_wmi_dmi_table);
  89
  90 enum asus_wmi_sensor_class {
  91         VOLTAGE         = 0x0,
  92         TEMPERATURE_C   = 0x1,
  93         FAN_RPM         = 0x2,
  94         CURRENT         = 0x3,
  95         WATER_FLOW      = 0x4,
  96 };
  97
  98 enum asus_wmi_location {
  99         CPU             = 0x0,
 100         CPU_SOC         = 0x1,
 101         DRAM            = 0x2,
 102         MOTHERBOARD     = 0x3,
 103         CHIPSET         = 0x4,
 104         AUX             = 0x5,
 105         VRM             = 0x6,
 106         COOLER          = 0x7
 107 };
 108
 109 enum asus_wmi_type {
 110         SIGNED_INT      = 0x0,
 111         UNSIGNED_INT    = 0x1,
 112         SCALED          = 0x3,
 113 };
 114
 115 enum asus_wmi_source {
 116         SIO             = 0x1,
 117         EC              = 0x2
 118 };
 119
 120 static enum hwmon_sensor_types asus_data_types[] = {
 121         [VOLTAGE]       = hwmon_in,
 122         [TEMPERATURE_C] = hwmon_temp,
 123         [FAN_RPM]       = hwmon_fan,
 124         [CURRENT]       = hwmon_curr,
 125         [WATER_FLOW]    = hwmon_fan,
 126 };
 127
 128 static u32 hwmon_attributes[hwmon_max] = {
 129         [hwmon_chip]    = HWMON_C_REGISTER_TZ,
 130         [hwmon_temp]    = HWMON_T_INPUT | HWMON_T_LABEL,
 131         [hwmon_in]      = HWMON_I_INPUT | HWMON_I_LABEL,
 132         [hwmon_curr]    = HWMON_C_INPUT | HWMON_C_LABEL,
 133         [hwmon_fan]     = HWMON_F_INPUT | HWMON_F_LABEL,
 134 };
 135
 136 /**
 137  * struct asus_wmi_sensor_info - sensor info.
 138  * @id: sensor id.
 139  * @data_type: sensor class e.g. voltage, temp etc.
 140  * @location: sensor location.
 141  * @name: sensor name.
 142  * @source: sensor source.
 143  * @type: sensor type signed, unsigned etc.
 144  * @cached_value: cached sensor value.
 145  */
 146 struct asus_wmi_sensor_info {
 147         u32 id;
 148         int data_type;
 149         int location;
 150         char name[ASUS_WMI_MAX_STR_SIZE];
 151         int source;
 152         int type;
 153         long cached_value;
 154 };
 155
 156 struct asus_wmi_wmi_info {
 157         unsigned long source_last_updated[3];   /* in jiffies */
 158         int sensor_count;
 159
 160         const struct asus_wmi_sensor_info **info[hwmon_max];
 161         struct asus_wmi_sensor_info **info_by_id;
 162 };
 163
 164 struct asus_wmi_sensors {
 165         struct asus_wmi_wmi_info wmi;
 166         /* lock access to internal cache */
 167         struct mutex lock;
 168 };
 169
 170 /*
 171  * Universal method for calling WMI method
 172  */
 173 static int asus_wmi_call_method(u32 method_id, u32 *args, struct acpi_buffer *output)
 174 {
 175         struct acpi_buffer input = {(acpi_size) sizeof(*args), args };
 176         acpi_status status;
 177
 178         status = wmi_evaluate_method(ASUSWMI_MONITORING_GUID, 0,
 179                                      method_id, &input, output);
 180         if (ACPI_FAILURE(status))
 181                 return -EIO;
 182
 183         return 0;
 184 }
 185
 186 /*
 187  * Gets the version of the ASUS sensors interface implemented
 188  */
 189 static int asus_wmi_get_version(u32 *version)
 190 {
 191         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 192         u32 args[] = {0, 0, 0};
 193         union acpi_object *obj;
 194         int err;
 195
 196         err = asus_wmi_call_method(ASUSWMI_METHODID_GET_VERSION, args, &output);
 197         if (err)
 198                 return err;
 199
 200         obj = output.pointer;
 201         if (!obj)
 202                 return -EIO;
 203
 204         if (obj->type != ACPI_TYPE_INTEGER) {
 205                 err = -EIO;
 206                 goto out_free_obj;
 207         }
 208
 209         err = 0;
 210         *version = obj->integer.value;
 211
 212 out_free_obj:
 213         ACPI_FREE(obj);
 214         return err;
 215 }
 216
 217 /*
 218  * Gets the number of sensor items
 219  */
 220 static int asus_wmi_get_item_count(u32 *count)
 221 {
 222         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 223         u32 args[] = {0, 0, 0};
 224         union acpi_object *obj;
 225         int err;
 226
 227         err = asus_wmi_call_method(ASUSWMI_METHODID_GET_NUMBER, args, &output);
 228         if (err)
 229                 return err;
 230
 231         obj = output.pointer;
 232         if (!obj)
 233                 return -EIO;
 234
 235         if (obj->type != ACPI_TYPE_INTEGER) {
 236                 err = -EIO;
 237                 goto out_free_obj;
 238         }
 239
 240         err = 0;
 241         *count = obj->integer.value;
 242
 243 out_free_obj:
 244         ACPI_FREE(obj);
 245         return err;
 246 }
 247
 248 static int asus_wmi_hwmon_add_chan_info(struct hwmon_channel_info *asus_wmi_hwmon_chan,
 249                                         struct device *dev, int num,
 250                                         enum hwmon_sensor_types type, u32 config)
 251 {
 252         u32 *cfg;
 253
 254         cfg = devm_kcalloc(dev, num + 1, sizeof(*cfg), GFP_KERNEL);
 255         if (!cfg)
 256                 return -ENOMEM;
 257
 258         asus_wmi_hwmon_chan->type = type;
 259         asus_wmi_hwmon_chan->config = cfg;
 260         memset32(cfg, config, num);
 261
 262         return 0;
 263 }
 264
 265 /*
 266  * For a given sensor item returns details e.g. type (voltage/temperature/fan speed etc), bank etc
 267  */
 268 static int asus_wmi_sensor_info(int index, struct asus_wmi_sensor_info *s)
 269 {
 270         union acpi_object name_obj, data_type_obj, location_obj, source_obj, type_obj;
 271         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 272         u32 args[] = {index, 0};
 273         union acpi_object *obj;
 274         int err;
 275
 276         err = asus_wmi_call_method(ASUSWMI_METHODID_GET_INFO, args, &output);
 277         if (err)
 278                 return err;
 279
 280         s->id = index;
 281
 282         obj = output.pointer;
 283         if (!obj)
 284                 return -EIO;
 285
 286         if (obj->type != ACPI_TYPE_PACKAGE) {
 287                 err = -EIO;
 288                 goto out_free_obj;
 289         }
 290
 291         if (obj->package.count != 5) {
 292                 err = -EIO;
 293                 goto out_free_obj;
 294         }
 295
 296         name_obj = obj->package.elements[0];
 297         if (name_obj.type != ACPI_TYPE_STRING) {
 298                 err = -EIO;
 299                 goto out_free_obj;
 300         }
 301
 302         strncpy(s->name, name_obj.string.pointer, sizeof(s->name) - 1);
 303
 304         data_type_obj = obj->package.elements[1];
 305         if (data_type_obj.type != ACPI_TYPE_INTEGER) {
 306                 err = -EIO;
 307                 goto out_free_obj;
 308         }
 309
 310         s->data_type = data_type_obj.integer.value;
 311
 312         location_obj = obj->package.elements[2];
 313         if (location_obj.type != ACPI_TYPE_INTEGER) {
 314                 err = -EIO;
 315                 goto out_free_obj;
 316         }
 317
 318         s->location = location_obj.integer.value;
 319
 320         source_obj = obj->package.elements[3];
 321         if (source_obj.type != ACPI_TYPE_INTEGER) {
 322                 err = -EIO;
 323                 goto out_free_obj;
 324         }
 325
 326         s->source = source_obj.integer.value;
 327
 328         type_obj = obj->package.elements[4];
 329         if (type_obj.type != ACPI_TYPE_INTEGER) {
 330                 err = -EIO;
 331                 goto out_free_obj;
 332         }
 333
 334         err = 0;
 335         s->type = type_obj.integer.value;
 336
 337 out_free_obj:
 338         ACPI_FREE(obj);
 339         return err;
 340 }
 341
 342 static int asus_wmi_update_buffer(int source)
 343 {
 344         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 345         u32 args[] = {source, 0};
 346
 347         return asus_wmi_call_method(ASUSWMI_METHODID_UPDATE_BUFFER, args, &output);
 348 }
 349
 350 static int asus_wmi_get_sensor_value(u8 index, long *value)
 351 {
 352         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 353         u32 args[] = {index, 0};
 354         union acpi_object *obj;
 355         int err;
 356
 357         err = asus_wmi_call_method(ASUSWMI_METHODID_GET_VALUE, args, &output);
 358         if (err)
 359                 return err;
 360
 361         obj = output.pointer;
 362         if (!obj)
 363                 return -EIO;
 364
 365         if (obj->type != ACPI_TYPE_INTEGER) {
 366                 err = -EIO;
 367                 goto out_free_obj;
 368         }
 369
 370         err = 0;
 371         *value = obj->integer.value;
 372
 373 out_free_obj:
 374         ACPI_FREE(obj);
 375         return err;
 376 }
 377
 378 static int asus_wmi_update_values_for_source(u8 source, struct asus_wmi_sensors *sensor_data)
 379 {
 380         struct asus_wmi_sensor_info *sensor;
 381         long value = 0;
 382         int ret;
 383         int i;
 384
 385         for (i = 0; i < sensor_data->wmi.sensor_count; i++) {
 386                 sensor = sensor_data->wmi.info_by_id[i];
 387                 if (sensor && sensor->source == source) {
 388                         ret = asus_wmi_get_sensor_value(sensor->id, &value);
 389                         if (ret)
 390                                 return ret;
 391
 392                         sensor->cached_value = value;
 393                 }
 394         }
 395
 396         return 0;
 397 }
 398
 399 static int asus_wmi_scale_sensor_value(u32 value, int data_type)
 400 {
 401         /* FAN_RPM and WATER_FLOW don't need scaling */
 402         switch (data_type) {
 403         case VOLTAGE:
 404                 /* value in microVolts */
 405                 return DIV_ROUND_CLOSEST(value,  KILO);
 406         case TEMPERATURE_C:
 407                 /* value in Celsius */
 408                 return value * MILLIDEGREE_PER_DEGREE;
 409         case CURRENT:
 410                 /* value in Amperes */
 411                 return value * MILLI;
 412         }
 413         return value;
 414 }
 415
 416 static int asus_wmi_get_cached_value_or_update(const struct asus_wmi_sensor_info *sensor,
 417                                                struct asus_wmi_sensors *sensor_data,
 418                                                u32 *value)
 419 {
 420         int ret = 0;
 421
 422         mutex_lock(&sensor_data->lock);
 423
 424         if (time_after(jiffies, sensor_data->wmi.source_last_updated[sensor->source] + HZ)) {
 425                 ret = asus_wmi_update_buffer(sensor->source);
 426                 if (ret)
 427                         goto unlock;
 428
 429                 ret = asus_wmi_update_values_for_source(sensor->source, sensor_data);
 430                 if (ret)
 431                         goto unlock;
 432
 433                 sensor_data->wmi.source_last_updated[sensor->source] = jiffies;
 434         }
 435
 436         *value = sensor->cached_value;
 437
 438 unlock:
 439         mutex_unlock(&sensor_data->lock);
 440
 441         return ret;
 442 }
 443
 444 /* Now follow the functions that implement the hwmon interface */
 445 static int asus_wmi_hwmon_read(struct device *dev, enum hwmon_sensor_types type,
 446                                u32 attr, int channel, long *val)
 447 {
 448         const struct asus_wmi_sensor_info *sensor;
 449         u32 value = 0;
 450         int ret;
 451
 452         struct asus_wmi_sensors *sensor_data = dev_get_drvdata(dev);
 453
 454         sensor = *(sensor_data->wmi.info[type] + channel);
 455
 456         ret = asus_wmi_get_cached_value_or_update(sensor, sensor_data, &value);
 457         if (ret)
 458                 return ret;
 459
 460         *val = asus_wmi_scale_sensor_value(value, sensor->data_type);
 461
 462         return ret;
 463 }
 464
 465 static int asus_wmi_hwmon_read_string(struct device *dev,
 466                                       enum hwmon_sensor_types type, u32 attr,
 467                                       int channel, const char **str)
 468 {
 469         struct asus_wmi_sensors *sensor_data = dev_get_drvdata(dev);
 470         const struct asus_wmi_sensor_info *sensor;
 471
 472         sensor = *(sensor_data->wmi.info[type] + channel);
 473         *str = sensor->name;
 474
 475         return 0;
 476 }
 477
 478 static umode_t asus_wmi_hwmon_is_visible(const void *drvdata,
 479                                          enum hwmon_sensor_types type, u32 attr,
 480                                          int channel)
 481 {
 482         const struct asus_wmi_sensors *sensor_data = drvdata;
 483         const struct asus_wmi_sensor_info *sensor;
 484
 485         sensor = *(sensor_data->wmi.info[type] + channel);
 486         if (sensor)
 487                 return 0444;
 488
 489         return 0;
 490 }
 491
 492 static const struct hwmon_ops asus_wmi_hwmon_ops = {
 493         .is_visible = asus_wmi_hwmon_is_visible,
 494         .read = asus_wmi_hwmon_read,
 495         .read_string = asus_wmi_hwmon_read_string,
 496 };
 497
 498 static struct hwmon_chip_info asus_wmi_chip_info = {
 499         .ops = &asus_wmi_hwmon_ops,
 500         .info = NULL,
 501 };
 502
 503 static int asus_wmi_configure_sensor_setup(struct device *dev,
 504                                            struct asus_wmi_sensors *sensor_data)
 505 {
 506         const struct hwmon_channel_info **ptr_asus_wmi_ci;
 507         struct hwmon_channel_info *asus_wmi_hwmon_chan;
 508         int nr_count[hwmon_max] = {}, nr_types = 0;
 509         struct asus_wmi_sensor_info *temp_sensor;
 510         const struct hwmon_chip_info *chip_info;
 511         enum hwmon_sensor_types type;
 512         struct device *hwdev;
 513         int i, idx;
 514         int err;
 515
 516         temp_sensor = devm_kcalloc(dev, 1, sizeof(*temp_sensor), GFP_KERNEL);
 517         if (!temp_sensor)
 518                 return -ENOMEM;
 519
 520         for (i = 0; i < sensor_data->wmi.sensor_count; i++) {
 521                 err = asus_wmi_sensor_info(i, temp_sensor);
 522                 if (err)
 523                         return err;
 524
 525                 switch (temp_sensor->data_type) {
 526                 case TEMPERATURE_C:
 527                 case VOLTAGE:
 528                 case CURRENT:
 529                 case FAN_RPM:
 530                 case WATER_FLOW:
 531                         type = asus_data_types[temp_sensor->data_type];
 532                         if (!nr_count[type])
 533                                 nr_types++;
 534                         nr_count[type]++;
 535                         break;
 536                 }
 537         }
 538
 539         if (nr_count[hwmon_temp])
 540                 nr_count[hwmon_chip]++, nr_types++;
 541
 542         asus_wmi_hwmon_chan = devm_kcalloc(dev, nr_types,
 543                                            sizeof(*asus_wmi_hwmon_chan),
 544                                            GFP_KERNEL);
 545         if (!asus_wmi_hwmon_chan)
 546                 return -ENOMEM;
 547
 548         ptr_asus_wmi_ci = devm_kcalloc(dev, nr_types + 1,
 549                                        sizeof(*ptr_asus_wmi_ci), GFP_KERNEL);
 550         if (!ptr_asus_wmi_ci)
 551                 return -ENOMEM;
 552
 553         asus_wmi_chip_info.info = ptr_asus_wmi_ci;
 554         chip_info = &asus_wmi_chip_info;
 555
 556         sensor_data->wmi.info_by_id = devm_kcalloc(dev, sensor_data->wmi.sensor_count,
 557                                                    sizeof(*sensor_data->wmi.info_by_id),
 558                                                    GFP_KERNEL);
 559
 560         if (!sensor_data->wmi.info_by_id)
 561                 return -ENOMEM;
 562
 563         for (type = 0; type < hwmon_max; type++) {
 564                 if (!nr_count[type])
 565                         continue;
 566
 567                 err = asus_wmi_hwmon_add_chan_info(asus_wmi_hwmon_chan, dev,
 568                                                    nr_count[type], type,
 569                                                    hwmon_attributes[type]);
 570                 if (err)
 571                         return err;
 572
 573                 *ptr_asus_wmi_ci++ = asus_wmi_hwmon_chan++;
 574
 575                 sensor_data->wmi.info[type] = devm_kcalloc(dev,
 576                                                            nr_count[type],
 577                                                            sizeof(*sensor_data->wmi.info),
 578                                                            GFP_KERNEL);
 579                 if (!sensor_data->wmi.info[type])
 580                         return -ENOMEM;
 581         }
 582
 583         for (i = sensor_data->wmi.sensor_count - 1; i >= 0; i--) {
 584                 temp_sensor = devm_kzalloc(dev, sizeof(*temp_sensor), GFP_KERNEL);
 585                 if (!temp_sensor)
 586                         return -ENOMEM;
 587
 588                 err = asus_wmi_sensor_info(i, temp_sensor);
 589                 if (err)
 590                         continue;
 591
 592                 switch (temp_sensor->data_type) {
 593                 case TEMPERATURE_C:
 594                 case VOLTAGE:
 595                 case CURRENT:
 596                 case FAN_RPM:
 597                 case WATER_FLOW:
 598                         type = asus_data_types[temp_sensor->data_type];
 599                         idx = --nr_count[type];
 600                         *(sensor_data->wmi.info[type] + idx) = temp_sensor;
 601                         sensor_data->wmi.info_by_id[i] = temp_sensor;
 602                         break;
 603                 }
 604         }
 605
 606         dev_dbg(dev, "board has %d sensors",
 607                 sensor_data->wmi.sensor_count);
 608
 609         hwdev = devm_hwmon_device_register_with_info(dev, "asus_wmi_sensors",
 610                                                      sensor_data, chip_info, NULL);
 611
 612         return PTR_ERR_OR_ZERO(hwdev);
 613 }
 614
 615 static int asus_wmi_probe(struct wmi_device *wdev, const void *context)
 616 {
 617         struct asus_wmi_sensors *sensor_data;
 618         struct device *dev = &wdev->dev;
 619         u32 version = 0;
 620
 621         if (!dmi_check_system(asus_wmi_dmi_table))
 622                 return -ENODEV;
 623
 624         sensor_data = devm_kzalloc(dev, sizeof(*sensor_data), GFP_KERNEL);
 625         if (!sensor_data)
 626                 return -ENOMEM;
 627
 628         if (asus_wmi_get_version(&version))
 629                 return -ENODEV;
 630
 631         if (asus_wmi_get_item_count(&sensor_data->wmi.sensor_count))
 632                 return -ENODEV;
 633
 634         if (sensor_data->wmi.sensor_count  <= 0 || version < 2) {
 635                 dev_info(dev, "version: %u with %d sensors is unsupported\n",
 636                          version, sensor_data->wmi.sensor_count);
 637
 638                 return -ENODEV;
 639         }
 640
 641         mutex_init(&sensor_data->lock);
 642
 643         dev_set_drvdata(dev, sensor_data);
 644
 645         return asus_wmi_configure_sensor_setup(dev, sensor_data);
 646 }
 647
 648 static const struct wmi_device_id asus_wmi_id_table[] = {
 649         { ASUSWMI_MONITORING_GUID, NULL },
 650         { }
 651 };
 652
 653 static struct wmi_driver asus_sensors_wmi_driver = {
 654         .driver = {
 655                 .name = "asus_wmi_sensors",
 656         },
 657         .id_table = asus_wmi_id_table,
 658         .probe = asus_wmi_probe,
 659 };
 660 module_wmi_driver(asus_sensors_wmi_driver);
 661
 662 MODULE_AUTHOR("Ed Brindley <[email protected]>");
 663 MODULE_DESCRIPTION("Asus WMI Sensors Driver");
 664 MODULE_LICENSE("GPL");