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 <kernel@maidavale.org>
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-F GAMING II"),
81 	DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG STRIX B450-I GAMING"),
82 	DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG STRIX X399-E GAMING"),
83 	DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG STRIX X470-F GAMING"),
84 	DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG STRIX X470-I GAMING"),
85 	DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG ZENITH EXTREME"),
86 	DMI_EXACT_MATCH_ASUS_BOARD_NAME("ROG ZENITH EXTREME ALPHA"),
87 	{}
88 };
89 MODULE_DEVICE_TABLE(dmi, asus_wmi_dmi_table);
90 
91 enum asus_wmi_sensor_class {
92 	VOLTAGE		= 0x0,
93 	TEMPERATURE_C	= 0x1,
94 	FAN_RPM		= 0x2,
95 	CURRENT		= 0x3,
96 	WATER_FLOW	= 0x4,
97 };
98 
99 enum asus_wmi_location {
100 	CPU		= 0x0,
101 	CPU_SOC		= 0x1,
102 	DRAM		= 0x2,
103 	MOTHERBOARD	= 0x3,
104 	CHIPSET		= 0x4,
105 	AUX		= 0x5,
106 	VRM		= 0x6,
107 	COOLER		= 0x7
108 };
109 
110 enum asus_wmi_type {
111 	SIGNED_INT	= 0x0,
112 	UNSIGNED_INT	= 0x1,
113 	SCALED		= 0x3,
114 };
115 
116 enum asus_wmi_source {
117 	SIO		= 0x1,
118 	EC		= 0x2
119 };
120 
121 static enum hwmon_sensor_types asus_data_types[] = {
122 	[VOLTAGE]	= hwmon_in,
123 	[TEMPERATURE_C]	= hwmon_temp,
124 	[FAN_RPM]	= hwmon_fan,
125 	[CURRENT]	= hwmon_curr,
126 	[WATER_FLOW]	= hwmon_fan,
127 };
128 
129 static u32 hwmon_attributes[hwmon_max] = {
130 	[hwmon_chip]	= HWMON_C_REGISTER_TZ,
131 	[hwmon_temp]	= HWMON_T_INPUT | HWMON_T_LABEL,
132 	[hwmon_in]	= HWMON_I_INPUT | HWMON_I_LABEL,
133 	[hwmon_curr]	= HWMON_C_INPUT | HWMON_C_LABEL,
134 	[hwmon_fan]	= HWMON_F_INPUT | HWMON_F_LABEL,
135 };
136 
137 /**
138  * struct asus_wmi_sensor_info - sensor info.
139  * @id: sensor id.
140  * @data_type: sensor class e.g. voltage, temp etc.
141  * @location: sensor location.
142  * @name: sensor name.
143  * @source: sensor source.
144  * @type: sensor type signed, unsigned etc.
145  * @cached_value: cached sensor value.
146  */
147 struct asus_wmi_sensor_info {
148 	u32 id;
149 	int data_type;
150 	int location;
151 	char name[ASUS_WMI_MAX_STR_SIZE];
152 	int source;
153 	int type;
154 	long cached_value;
155 };
156 
157 struct asus_wmi_wmi_info {
158 	unsigned long source_last_updated[3];	/* in jiffies */
159 	int sensor_count;
160 
161 	const struct asus_wmi_sensor_info **info[hwmon_max];
162 	struct asus_wmi_sensor_info **info_by_id;
163 };
164 
165 struct asus_wmi_sensors {
166 	struct asus_wmi_wmi_info wmi;
167 	/* lock access to internal cache */
168 	struct mutex lock;
169 };
170 
171 /*
172  * Universal method for calling WMI method
173  */
174 static int asus_wmi_call_method(u32 method_id, u32 *args, struct acpi_buffer *output)
175 {
176 	struct acpi_buffer input = {(acpi_size) sizeof(*args), args };
177 	acpi_status status;
178 
179 	status = wmi_evaluate_method(ASUSWMI_MONITORING_GUID, 0,
180 				     method_id, &input, output);
181 	if (ACPI_FAILURE(status))
182 		return -EIO;
183 
184 	return 0;
185 }
186 
187 /*
188  * Gets the version of the ASUS sensors interface implemented
189  */
190 static int asus_wmi_get_version(u32 *version)
191 {
192 	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
193 	u32 args[] = {0, 0, 0};
194 	union acpi_object *obj;
195 	int err;
196 
197 	err = asus_wmi_call_method(ASUSWMI_METHODID_GET_VERSION, args, &output);
198 	if (err)
199 		return err;
200 
201 	obj = output.pointer;
202 	if (!obj)
203 		return -EIO;
204 
205 	if (obj->type != ACPI_TYPE_INTEGER) {
206 		err = -EIO;
207 		goto out_free_obj;
208 	}
209 
210 	err = 0;
211 	*version = obj->integer.value;
212 
213 out_free_obj:
214 	ACPI_FREE(obj);
215 	return err;
216 }
217 
218 /*
219  * Gets the number of sensor items
220  */
221 static int asus_wmi_get_item_count(u32 *count)
222 {
223 	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
224 	u32 args[] = {0, 0, 0};
225 	union acpi_object *obj;
226 	int err;
227 
228 	err = asus_wmi_call_method(ASUSWMI_METHODID_GET_NUMBER, args, &output);
229 	if (err)
230 		return err;
231 
232 	obj = output.pointer;
233 	if (!obj)
234 		return -EIO;
235 
236 	if (obj->type != ACPI_TYPE_INTEGER) {
237 		err = -EIO;
238 		goto out_free_obj;
239 	}
240 
241 	err = 0;
242 	*count = obj->integer.value;
243 
244 out_free_obj:
245 	ACPI_FREE(obj);
246 	return err;
247 }
248 
249 static int asus_wmi_hwmon_add_chan_info(struct hwmon_channel_info *asus_wmi_hwmon_chan,
250 					struct device *dev, int num,
251 					enum hwmon_sensor_types type, u32 config)
252 {
253 	u32 *cfg;
254 
255 	cfg = devm_kcalloc(dev, num + 1, sizeof(*cfg), GFP_KERNEL);
256 	if (!cfg)
257 		return -ENOMEM;
258 
259 	asus_wmi_hwmon_chan->type = type;
260 	asus_wmi_hwmon_chan->config = cfg;
261 	memset32(cfg, config, num);
262 
263 	return 0;
264 }
265 
266 /*
267  * For a given sensor item returns details e.g. type (voltage/temperature/fan speed etc), bank etc
268  */
269 static int asus_wmi_sensor_info(int index, struct asus_wmi_sensor_info *s)
270 {
271 	union acpi_object name_obj, data_type_obj, location_obj, source_obj, type_obj;
272 	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
273 	u32 args[] = {index, 0};
274 	union acpi_object *obj;
275 	int err;
276 
277 	err = asus_wmi_call_method(ASUSWMI_METHODID_GET_INFO, args, &output);
278 	if (err)
279 		return err;
280 
281 	s->id = index;
282 
283 	obj = output.pointer;
284 	if (!obj)
285 		return -EIO;
286 
287 	if (obj->type != ACPI_TYPE_PACKAGE) {
288 		err = -EIO;
289 		goto out_free_obj;
290 	}
291 
292 	if (obj->package.count != 5) {
293 		err = -EIO;
294 		goto out_free_obj;
295 	}
296 
297 	name_obj = obj->package.elements[0];
298 	if (name_obj.type != ACPI_TYPE_STRING) {
299 		err = -EIO;
300 		goto out_free_obj;
301 	}
302 
303 	strncpy(s->name, name_obj.string.pointer, sizeof(s->name) - 1);
304 
305 	data_type_obj = obj->package.elements[1];
306 	if (data_type_obj.type != ACPI_TYPE_INTEGER) {
307 		err = -EIO;
308 		goto out_free_obj;
309 	}
310 
311 	s->data_type = data_type_obj.integer.value;
312 
313 	location_obj = obj->package.elements[2];
314 	if (location_obj.type != ACPI_TYPE_INTEGER) {
315 		err = -EIO;
316 		goto out_free_obj;
317 	}
318 
319 	s->location = location_obj.integer.value;
320 
321 	source_obj = obj->package.elements[3];
322 	if (source_obj.type != ACPI_TYPE_INTEGER) {
323 		err = -EIO;
324 		goto out_free_obj;
325 	}
326 
327 	s->source = source_obj.integer.value;
328 
329 	type_obj = obj->package.elements[4];
330 	if (type_obj.type != ACPI_TYPE_INTEGER) {
331 		err = -EIO;
332 		goto out_free_obj;
333 	}
334 
335 	err = 0;
336 	s->type = type_obj.integer.value;
337 
338 out_free_obj:
339 	ACPI_FREE(obj);
340 	return err;
341 }
342 
343 static int asus_wmi_update_buffer(int source)
344 {
345 	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
346 	u32 args[] = {source, 0};
347 
348 	return asus_wmi_call_method(ASUSWMI_METHODID_UPDATE_BUFFER, args, &output);
349 }
350 
351 static int asus_wmi_get_sensor_value(u8 index, long *value)
352 {
353 	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
354 	u32 args[] = {index, 0};
355 	union acpi_object *obj;
356 	int err;
357 
358 	err = asus_wmi_call_method(ASUSWMI_METHODID_GET_VALUE, args, &output);
359 	if (err)
360 		return err;
361 
362 	obj = output.pointer;
363 	if (!obj)
364 		return -EIO;
365 
366 	if (obj->type != ACPI_TYPE_INTEGER) {
367 		err = -EIO;
368 		goto out_free_obj;
369 	}
370 
371 	err = 0;
372 	*value = obj->integer.value;
373 
374 out_free_obj:
375 	ACPI_FREE(obj);
376 	return err;
377 }
378 
379 static int asus_wmi_update_values_for_source(u8 source, struct asus_wmi_sensors *sensor_data)
380 {
381 	struct asus_wmi_sensor_info *sensor;
382 	long value = 0;
383 	int ret;
384 	int i;
385 
386 	for (i = 0; i < sensor_data->wmi.sensor_count; i++) {
387 		sensor = sensor_data->wmi.info_by_id[i];
388 		if (sensor && sensor->source == source) {
389 			ret = asus_wmi_get_sensor_value(sensor->id, &value);
390 			if (ret)
391 				return ret;
392 
393 			sensor->cached_value = value;
394 		}
395 	}
396 
397 	return 0;
398 }
399 
400 static int asus_wmi_scale_sensor_value(u32 value, int data_type)
401 {
402 	/* FAN_RPM and WATER_FLOW don't need scaling */
403 	switch (data_type) {
404 	case VOLTAGE:
405 		/* value in microVolts */
406 		return DIV_ROUND_CLOSEST(value,  KILO);
407 	case TEMPERATURE_C:
408 		/* value in Celsius */
409 		return value * MILLIDEGREE_PER_DEGREE;
410 	case CURRENT:
411 		/* value in Amperes */
412 		return value * MILLI;
413 	}
414 	return value;
415 }
416 
417 static int asus_wmi_get_cached_value_or_update(const struct asus_wmi_sensor_info *sensor,
418 					       struct asus_wmi_sensors *sensor_data,
419 					       u32 *value)
420 {
421 	int ret = 0;
422 
423 	mutex_lock(&sensor_data->lock);
424 
425 	if (time_after(jiffies, sensor_data->wmi.source_last_updated[sensor->source] + HZ)) {
426 		ret = asus_wmi_update_buffer(sensor->source);
427 		if (ret)
428 			goto unlock;
429 
430 		ret = asus_wmi_update_values_for_source(sensor->source, sensor_data);
431 		if (ret)
432 			goto unlock;
433 
434 		sensor_data->wmi.source_last_updated[sensor->source] = jiffies;
435 	}
436 
437 	*value = sensor->cached_value;
438 
439 unlock:
440 	mutex_unlock(&sensor_data->lock);
441 
442 	return ret;
443 }
444 
445 /* Now follow the functions that implement the hwmon interface */
446 static int asus_wmi_hwmon_read(struct device *dev, enum hwmon_sensor_types type,
447 			       u32 attr, int channel, long *val)
448 {
449 	const struct asus_wmi_sensor_info *sensor;
450 	u32 value = 0;
451 	int ret;
452 
453 	struct asus_wmi_sensors *sensor_data = dev_get_drvdata(dev);
454 
455 	sensor = *(sensor_data->wmi.info[type] + channel);
456 
457 	ret = asus_wmi_get_cached_value_or_update(sensor, sensor_data, &value);
458 	if (ret)
459 		return ret;
460 
461 	*val = asus_wmi_scale_sensor_value(value, sensor->data_type);
462 
463 	return ret;
464 }
465 
466 static int asus_wmi_hwmon_read_string(struct device *dev,
467 				      enum hwmon_sensor_types type, u32 attr,
468 				      int channel, const char **str)
469 {
470 	struct asus_wmi_sensors *sensor_data = dev_get_drvdata(dev);
471 	const struct asus_wmi_sensor_info *sensor;
472 
473 	sensor = *(sensor_data->wmi.info[type] + channel);
474 	*str = sensor->name;
475 
476 	return 0;
477 }
478 
479 static umode_t asus_wmi_hwmon_is_visible(const void *drvdata,
480 					 enum hwmon_sensor_types type, u32 attr,
481 					 int channel)
482 {
483 	const struct asus_wmi_sensors *sensor_data = drvdata;
484 	const struct asus_wmi_sensor_info *sensor;
485 
486 	sensor = *(sensor_data->wmi.info[type] + channel);
487 	if (sensor)
488 		return 0444;
489 
490 	return 0;
491 }
492 
493 static const struct hwmon_ops asus_wmi_hwmon_ops = {
494 	.is_visible = asus_wmi_hwmon_is_visible,
495 	.read = asus_wmi_hwmon_read,
496 	.read_string = asus_wmi_hwmon_read_string,
497 };
498 
499 static struct hwmon_chip_info asus_wmi_chip_info = {
500 	.ops = &asus_wmi_hwmon_ops,
501 	.info = NULL,
502 };
503 
504 static int asus_wmi_configure_sensor_setup(struct device *dev,
505 					   struct asus_wmi_sensors *sensor_data)
506 {
507 	const struct hwmon_channel_info **ptr_asus_wmi_ci;
508 	struct hwmon_channel_info *asus_wmi_hwmon_chan;
509 	int nr_count[hwmon_max] = {}, nr_types = 0;
510 	struct asus_wmi_sensor_info *temp_sensor;
511 	const struct hwmon_chip_info *chip_info;
512 	enum hwmon_sensor_types type;
513 	struct device *hwdev;
514 	int i, idx;
515 	int err;
516 
517 	temp_sensor = devm_kcalloc(dev, 1, sizeof(*temp_sensor), GFP_KERNEL);
518 	if (!temp_sensor)
519 		return -ENOMEM;
520 
521 	for (i = 0; i < sensor_data->wmi.sensor_count; i++) {
522 		err = asus_wmi_sensor_info(i, temp_sensor);
523 		if (err)
524 			return err;
525 
526 		switch (temp_sensor->data_type) {
527 		case TEMPERATURE_C:
528 		case VOLTAGE:
529 		case CURRENT:
530 		case FAN_RPM:
531 		case WATER_FLOW:
532 			type = asus_data_types[temp_sensor->data_type];
533 			if (!nr_count[type])
534 				nr_types++;
535 			nr_count[type]++;
536 			break;
537 		}
538 	}
539 
540 	if (nr_count[hwmon_temp])
541 		nr_count[hwmon_chip]++, nr_types++;
542 
543 	asus_wmi_hwmon_chan = devm_kcalloc(dev, nr_types,
544 					   sizeof(*asus_wmi_hwmon_chan),
545 					   GFP_KERNEL);
546 	if (!asus_wmi_hwmon_chan)
547 		return -ENOMEM;
548 
549 	ptr_asus_wmi_ci = devm_kcalloc(dev, nr_types + 1,
550 				       sizeof(*ptr_asus_wmi_ci), GFP_KERNEL);
551 	if (!ptr_asus_wmi_ci)
552 		return -ENOMEM;
553 
554 	asus_wmi_chip_info.info = ptr_asus_wmi_ci;
555 	chip_info = &asus_wmi_chip_info;
556 
557 	sensor_data->wmi.info_by_id = devm_kcalloc(dev, sensor_data->wmi.sensor_count,
558 						   sizeof(*sensor_data->wmi.info_by_id),
559 						   GFP_KERNEL);
560 
561 	if (!sensor_data->wmi.info_by_id)
562 		return -ENOMEM;
563 
564 	for (type = 0; type < hwmon_max; type++) {
565 		if (!nr_count[type])
566 			continue;
567 
568 		err = asus_wmi_hwmon_add_chan_info(asus_wmi_hwmon_chan, dev,
569 						   nr_count[type], type,
570 						   hwmon_attributes[type]);
571 		if (err)
572 			return err;
573 
574 		*ptr_asus_wmi_ci++ = asus_wmi_hwmon_chan++;
575 
576 		sensor_data->wmi.info[type] = devm_kcalloc(dev,
577 							   nr_count[type],
578 							   sizeof(*sensor_data->wmi.info),
579 							   GFP_KERNEL);
580 		if (!sensor_data->wmi.info[type])
581 			return -ENOMEM;
582 	}
583 
584 	for (i = sensor_data->wmi.sensor_count - 1; i >= 0; i--) {
585 		temp_sensor = devm_kzalloc(dev, sizeof(*temp_sensor), GFP_KERNEL);
586 		if (!temp_sensor)
587 			return -ENOMEM;
588 
589 		err = asus_wmi_sensor_info(i, temp_sensor);
590 		if (err)
591 			continue;
592 
593 		switch (temp_sensor->data_type) {
594 		case TEMPERATURE_C:
595 		case VOLTAGE:
596 		case CURRENT:
597 		case FAN_RPM:
598 		case WATER_FLOW:
599 			type = asus_data_types[temp_sensor->data_type];
600 			idx = --nr_count[type];
601 			*(sensor_data->wmi.info[type] + idx) = temp_sensor;
602 			sensor_data->wmi.info_by_id[i] = temp_sensor;
603 			break;
604 		}
605 	}
606 
607 	dev_dbg(dev, "board has %d sensors",
608 		sensor_data->wmi.sensor_count);
609 
610 	hwdev = devm_hwmon_device_register_with_info(dev, "asus_wmi_sensors",
611 						     sensor_data, chip_info, NULL);
612 
613 	return PTR_ERR_OR_ZERO(hwdev);
614 }
615 
616 static int asus_wmi_probe(struct wmi_device *wdev, const void *context)
617 {
618 	struct asus_wmi_sensors *sensor_data;
619 	struct device *dev = &wdev->dev;
620 	u32 version = 0;
621 
622 	if (!dmi_check_system(asus_wmi_dmi_table))
623 		return -ENODEV;
624 
625 	sensor_data = devm_kzalloc(dev, sizeof(*sensor_data), GFP_KERNEL);
626 	if (!sensor_data)
627 		return -ENOMEM;
628 
629 	if (asus_wmi_get_version(&version))
630 		return -ENODEV;
631 
632 	if (asus_wmi_get_item_count(&sensor_data->wmi.sensor_count))
633 		return -ENODEV;
634 
635 	if (sensor_data->wmi.sensor_count  <= 0 || version < 2) {
636 		dev_info(dev, "version: %u with %d sensors is unsupported\n",
637 			 version, sensor_data->wmi.sensor_count);
638 
639 		return -ENODEV;
640 	}
641 
642 	mutex_init(&sensor_data->lock);
643 
644 	dev_set_drvdata(dev, sensor_data);
645 
646 	return asus_wmi_configure_sensor_setup(dev, sensor_data);
647 }
648 
649 static const struct wmi_device_id asus_wmi_id_table[] = {
650 	{ ASUSWMI_MONITORING_GUID, NULL },
651 	{ }
652 };
653 
654 static struct wmi_driver asus_sensors_wmi_driver = {
655 	.driver = {
656 		.name = "asus_wmi_sensors",
657 	},
658 	.id_table = asus_wmi_id_table,
659 	.probe = asus_wmi_probe,
660 };
661 module_wmi_driver(asus_sensors_wmi_driver);
662 
663 MODULE_AUTHOR("Ed Brindley <kernel@maidavale.org>");
664 MODULE_DESCRIPTION("Asus WMI Sensors Driver");
665 MODULE_LICENSE("GPL");
666