Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / drivers / gpu / drm / nouveau / nouveau_hwmon.c
blob7c965648df8049133b5da93dd21be6f6f11e6e8f
1 /*
2 * Copyright 2010 Red Hat Inc.
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
22 * Authors: Ben Skeggs
25 #ifdef CONFIG_ACPI
26 #include <linux/acpi.h>
27 #endif
28 #include <linux/power_supply.h>
29 #include <linux/hwmon.h>
30 #include <linux/hwmon-sysfs.h>
32 #include <drm/drmP.h>
34 #include "nouveau_drv.h"
35 #include "nouveau_hwmon.h"
37 #include <nvkm/subdev/iccsense.h>
38 #include <nvkm/subdev/volt.h>
40 #if defined(CONFIG_HWMON) || (defined(MODULE) && defined(CONFIG_HWMON_MODULE))
42 static ssize_t
43 nouveau_hwmon_show_temp1_auto_point1_pwm(struct device *d,
44 struct device_attribute *a, char *buf)
46 return snprintf(buf, PAGE_SIZE, "%d\n", 100);
48 static SENSOR_DEVICE_ATTR(temp1_auto_point1_pwm, 0444,
49 nouveau_hwmon_show_temp1_auto_point1_pwm, NULL, 0);
51 static ssize_t
52 nouveau_hwmon_temp1_auto_point1_temp(struct device *d,
53 struct device_attribute *a, char *buf)
55 struct drm_device *dev = dev_get_drvdata(d);
56 struct nouveau_drm *drm = nouveau_drm(dev);
57 struct nvkm_therm *therm = nvxx_therm(&drm->client.device);
59 return snprintf(buf, PAGE_SIZE, "%d\n",
60 therm->attr_get(therm, NVKM_THERM_ATTR_THRS_FAN_BOOST) * 1000);
62 static ssize_t
63 nouveau_hwmon_set_temp1_auto_point1_temp(struct device *d,
64 struct device_attribute *a,
65 const char *buf, size_t count)
67 struct drm_device *dev = dev_get_drvdata(d);
68 struct nouveau_drm *drm = nouveau_drm(dev);
69 struct nvkm_therm *therm = nvxx_therm(&drm->client.device);
70 long value;
72 if (kstrtol(buf, 10, &value) == -EINVAL)
73 return count;
75 therm->attr_set(therm, NVKM_THERM_ATTR_THRS_FAN_BOOST,
76 value / 1000);
78 return count;
80 static SENSOR_DEVICE_ATTR(temp1_auto_point1_temp, 0644,
81 nouveau_hwmon_temp1_auto_point1_temp,
82 nouveau_hwmon_set_temp1_auto_point1_temp, 0);
84 static ssize_t
85 nouveau_hwmon_temp1_auto_point1_temp_hyst(struct device *d,
86 struct device_attribute *a, char *buf)
88 struct drm_device *dev = dev_get_drvdata(d);
89 struct nouveau_drm *drm = nouveau_drm(dev);
90 struct nvkm_therm *therm = nvxx_therm(&drm->client.device);
92 return snprintf(buf, PAGE_SIZE, "%d\n",
93 therm->attr_get(therm, NVKM_THERM_ATTR_THRS_FAN_BOOST_HYST) * 1000);
95 static ssize_t
96 nouveau_hwmon_set_temp1_auto_point1_temp_hyst(struct device *d,
97 struct device_attribute *a,
98 const char *buf, size_t count)
100 struct drm_device *dev = dev_get_drvdata(d);
101 struct nouveau_drm *drm = nouveau_drm(dev);
102 struct nvkm_therm *therm = nvxx_therm(&drm->client.device);
103 long value;
105 if (kstrtol(buf, 10, &value) == -EINVAL)
106 return count;
108 therm->attr_set(therm, NVKM_THERM_ATTR_THRS_FAN_BOOST_HYST,
109 value / 1000);
111 return count;
113 static SENSOR_DEVICE_ATTR(temp1_auto_point1_temp_hyst, 0644,
114 nouveau_hwmon_temp1_auto_point1_temp_hyst,
115 nouveau_hwmon_set_temp1_auto_point1_temp_hyst, 0);
117 static ssize_t
118 nouveau_hwmon_get_pwm1_max(struct device *d,
119 struct device_attribute *a, char *buf)
121 struct drm_device *dev = dev_get_drvdata(d);
122 struct nouveau_drm *drm = nouveau_drm(dev);
123 struct nvkm_therm *therm = nvxx_therm(&drm->client.device);
124 int ret;
126 ret = therm->attr_get(therm, NVKM_THERM_ATTR_FAN_MAX_DUTY);
127 if (ret < 0)
128 return ret;
130 return sprintf(buf, "%i\n", ret);
133 static ssize_t
134 nouveau_hwmon_get_pwm1_min(struct device *d,
135 struct device_attribute *a, char *buf)
137 struct drm_device *dev = dev_get_drvdata(d);
138 struct nouveau_drm *drm = nouveau_drm(dev);
139 struct nvkm_therm *therm = nvxx_therm(&drm->client.device);
140 int ret;
142 ret = therm->attr_get(therm, NVKM_THERM_ATTR_FAN_MIN_DUTY);
143 if (ret < 0)
144 return ret;
146 return sprintf(buf, "%i\n", ret);
149 static ssize_t
150 nouveau_hwmon_set_pwm1_min(struct device *d, struct device_attribute *a,
151 const char *buf, size_t count)
153 struct drm_device *dev = dev_get_drvdata(d);
154 struct nouveau_drm *drm = nouveau_drm(dev);
155 struct nvkm_therm *therm = nvxx_therm(&drm->client.device);
156 long value;
157 int ret;
159 if (kstrtol(buf, 10, &value) == -EINVAL)
160 return -EINVAL;
162 ret = therm->attr_set(therm, NVKM_THERM_ATTR_FAN_MIN_DUTY, value);
163 if (ret < 0)
164 return ret;
166 return count;
168 static SENSOR_DEVICE_ATTR(pwm1_min, 0644,
169 nouveau_hwmon_get_pwm1_min,
170 nouveau_hwmon_set_pwm1_min, 0);
172 static ssize_t
173 nouveau_hwmon_set_pwm1_max(struct device *d, struct device_attribute *a,
174 const char *buf, size_t count)
176 struct drm_device *dev = dev_get_drvdata(d);
177 struct nouveau_drm *drm = nouveau_drm(dev);
178 struct nvkm_therm *therm = nvxx_therm(&drm->client.device);
179 long value;
180 int ret;
182 if (kstrtol(buf, 10, &value) == -EINVAL)
183 return -EINVAL;
185 ret = therm->attr_set(therm, NVKM_THERM_ATTR_FAN_MAX_DUTY, value);
186 if (ret < 0)
187 return ret;
189 return count;
191 static SENSOR_DEVICE_ATTR(pwm1_max, 0644,
192 nouveau_hwmon_get_pwm1_max,
193 nouveau_hwmon_set_pwm1_max, 0);
195 static struct attribute *pwm_fan_sensor_attrs[] = {
196 &sensor_dev_attr_pwm1_min.dev_attr.attr,
197 &sensor_dev_attr_pwm1_max.dev_attr.attr,
198 NULL
200 static const struct attribute_group pwm_fan_sensor_group = {
201 .attrs = pwm_fan_sensor_attrs,
204 static struct attribute *temp1_auto_point_sensor_attrs[] = {
205 &sensor_dev_attr_temp1_auto_point1_pwm.dev_attr.attr,
206 &sensor_dev_attr_temp1_auto_point1_temp.dev_attr.attr,
207 &sensor_dev_attr_temp1_auto_point1_temp_hyst.dev_attr.attr,
208 NULL
210 static const struct attribute_group temp1_auto_point_sensor_group = {
211 .attrs = temp1_auto_point_sensor_attrs,
214 #define N_ATTR_GROUPS 3
216 static const u32 nouveau_config_chip[] = {
217 HWMON_C_UPDATE_INTERVAL,
221 static const u32 nouveau_config_in[] = {
222 HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_LABEL,
226 static const u32 nouveau_config_temp[] = {
227 HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST |
228 HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_EMERGENCY |
229 HWMON_T_EMERGENCY_HYST,
233 static const u32 nouveau_config_fan[] = {
234 HWMON_F_INPUT,
238 static const u32 nouveau_config_pwm[] = {
239 HWMON_PWM_INPUT | HWMON_PWM_ENABLE,
243 static const u32 nouveau_config_power[] = {
244 HWMON_P_INPUT | HWMON_P_CAP_MAX | HWMON_P_CRIT,
248 static const struct hwmon_channel_info nouveau_chip = {
249 .type = hwmon_chip,
250 .config = nouveau_config_chip,
253 static const struct hwmon_channel_info nouveau_temp = {
254 .type = hwmon_temp,
255 .config = nouveau_config_temp,
258 static const struct hwmon_channel_info nouveau_fan = {
259 .type = hwmon_fan,
260 .config = nouveau_config_fan,
263 static const struct hwmon_channel_info nouveau_in = {
264 .type = hwmon_in,
265 .config = nouveau_config_in,
268 static const struct hwmon_channel_info nouveau_pwm = {
269 .type = hwmon_pwm,
270 .config = nouveau_config_pwm,
273 static const struct hwmon_channel_info nouveau_power = {
274 .type = hwmon_power,
275 .config = nouveau_config_power,
278 static const struct hwmon_channel_info *nouveau_info[] = {
279 &nouveau_chip,
280 &nouveau_temp,
281 &nouveau_fan,
282 &nouveau_in,
283 &nouveau_pwm,
284 &nouveau_power,
285 NULL
288 static umode_t
289 nouveau_chip_is_visible(const void *data, u32 attr, int channel)
291 switch (attr) {
292 case hwmon_chip_update_interval:
293 return 0444;
294 default:
295 return 0;
299 static umode_t
300 nouveau_power_is_visible(const void *data, u32 attr, int channel)
302 struct nouveau_drm *drm = nouveau_drm((struct drm_device *)data);
303 struct nvkm_iccsense *iccsense = nvxx_iccsense(&drm->client.device);
305 if (!iccsense || !iccsense->data_valid || list_empty(&iccsense->rails))
306 return 0;
308 switch (attr) {
309 case hwmon_power_input:
310 return 0444;
311 case hwmon_power_max:
312 if (iccsense->power_w_max)
313 return 0444;
314 return 0;
315 case hwmon_power_crit:
316 if (iccsense->power_w_crit)
317 return 0444;
318 return 0;
319 default:
320 return 0;
324 static umode_t
325 nouveau_temp_is_visible(const void *data, u32 attr, int channel)
327 struct nouveau_drm *drm = nouveau_drm((struct drm_device *)data);
328 struct nvkm_therm *therm = nvxx_therm(&drm->client.device);
330 if (therm && therm->attr_get && nvkm_therm_temp_get(therm) < 0)
331 return 0;
333 switch (attr) {
334 case hwmon_temp_input:
335 return 0444;
336 case hwmon_temp_max:
337 case hwmon_temp_max_hyst:
338 case hwmon_temp_crit:
339 case hwmon_temp_crit_hyst:
340 case hwmon_temp_emergency:
341 case hwmon_temp_emergency_hyst:
342 return 0644;
343 default:
344 return 0;
348 static umode_t
349 nouveau_pwm_is_visible(const void *data, u32 attr, int channel)
351 struct nouveau_drm *drm = nouveau_drm((struct drm_device *)data);
352 struct nvkm_therm *therm = nvxx_therm(&drm->client.device);
354 if (therm && therm->attr_get && therm->fan_get &&
355 therm->fan_get(therm) < 0)
356 return 0;
358 switch (attr) {
359 case hwmon_pwm_enable:
360 case hwmon_pwm_input:
361 return 0644;
362 default:
363 return 0;
367 static umode_t
368 nouveau_input_is_visible(const void *data, u32 attr, int channel)
370 struct nouveau_drm *drm = nouveau_drm((struct drm_device *)data);
371 struct nvkm_volt *volt = nvxx_volt(&drm->client.device);
373 if (!volt || nvkm_volt_get(volt) < 0)
374 return 0;
376 switch (attr) {
377 case hwmon_in_input:
378 case hwmon_in_label:
379 case hwmon_in_min:
380 case hwmon_in_max:
381 return 0444;
382 default:
383 return 0;
387 static umode_t
388 nouveau_fan_is_visible(const void *data, u32 attr, int channel)
390 struct nouveau_drm *drm = nouveau_drm((struct drm_device *)data);
391 struct nvkm_therm *therm = nvxx_therm(&drm->client.device);
393 if (!therm || !therm->attr_get || nvkm_therm_fan_sense(therm) < 0)
394 return 0;
396 switch (attr) {
397 case hwmon_fan_input:
398 return 0444;
399 default:
400 return 0;
404 static int
405 nouveau_chip_read(struct device *dev, u32 attr, int channel, long *val)
407 switch (attr) {
408 case hwmon_chip_update_interval:
409 *val = 1000;
410 break;
411 default:
412 return -EOPNOTSUPP;
415 return 0;
418 static int
419 nouveau_temp_read(struct device *dev, u32 attr, int channel, long *val)
421 struct drm_device *drm_dev = dev_get_drvdata(dev);
422 struct nouveau_drm *drm = nouveau_drm(drm_dev);
423 struct nvkm_therm *therm = nvxx_therm(&drm->client.device);
424 int ret;
426 if (!therm || !therm->attr_get)
427 return -EOPNOTSUPP;
429 switch (attr) {
430 case hwmon_temp_input:
431 ret = nvkm_therm_temp_get(therm);
432 *val = ret < 0 ? ret : (ret * 1000);
433 break;
434 case hwmon_temp_max:
435 *val = therm->attr_get(therm, NVKM_THERM_ATTR_THRS_DOWN_CLK)
436 * 1000;
437 break;
438 case hwmon_temp_max_hyst:
439 *val = therm->attr_get(therm, NVKM_THERM_ATTR_THRS_DOWN_CLK_HYST)
440 * 1000;
441 break;
442 case hwmon_temp_crit:
443 *val = therm->attr_get(therm, NVKM_THERM_ATTR_THRS_CRITICAL)
444 * 1000;
445 break;
446 case hwmon_temp_crit_hyst:
447 *val = therm->attr_get(therm, NVKM_THERM_ATTR_THRS_CRITICAL_HYST)
448 * 1000;
449 break;
450 case hwmon_temp_emergency:
451 *val = therm->attr_get(therm, NVKM_THERM_ATTR_THRS_SHUTDOWN)
452 * 1000;
453 break;
454 case hwmon_temp_emergency_hyst:
455 *val = therm->attr_get(therm, NVKM_THERM_ATTR_THRS_SHUTDOWN_HYST)
456 * 1000;
457 break;
458 default:
459 return -EOPNOTSUPP;
462 return 0;
465 static int
466 nouveau_fan_read(struct device *dev, u32 attr, int channel, long *val)
468 struct drm_device *drm_dev = dev_get_drvdata(dev);
469 struct nouveau_drm *drm = nouveau_drm(drm_dev);
470 struct nvkm_therm *therm = nvxx_therm(&drm->client.device);
472 if (!therm)
473 return -EOPNOTSUPP;
475 switch (attr) {
476 case hwmon_fan_input:
477 *val = nvkm_therm_fan_sense(therm);
478 break;
479 default:
480 return -EOPNOTSUPP;
483 return 0;
486 static int
487 nouveau_in_read(struct device *dev, u32 attr, int channel, long *val)
489 struct drm_device *drm_dev = dev_get_drvdata(dev);
490 struct nouveau_drm *drm = nouveau_drm(drm_dev);
491 struct nvkm_volt *volt = nvxx_volt(&drm->client.device);
492 int ret;
494 if (!volt)
495 return -EOPNOTSUPP;
497 switch (attr) {
498 case hwmon_in_input:
499 ret = nvkm_volt_get(volt);
500 *val = ret < 0 ? ret : (ret / 1000);
501 break;
502 case hwmon_in_min:
503 *val = volt->min_uv > 0 ? (volt->min_uv / 1000) : -ENODEV;
504 break;
505 case hwmon_in_max:
506 *val = volt->max_uv > 0 ? (volt->max_uv / 1000) : -ENODEV;
507 break;
508 default:
509 return -EOPNOTSUPP;
512 return 0;
515 static int
516 nouveau_pwm_read(struct device *dev, u32 attr, int channel, long *val)
518 struct drm_device *drm_dev = dev_get_drvdata(dev);
519 struct nouveau_drm *drm = nouveau_drm(drm_dev);
520 struct nvkm_therm *therm = nvxx_therm(&drm->client.device);
522 if (!therm || !therm->attr_get || !therm->fan_get)
523 return -EOPNOTSUPP;
525 switch (attr) {
526 case hwmon_pwm_enable:
527 *val = therm->attr_get(therm, NVKM_THERM_ATTR_FAN_MODE);
528 break;
529 case hwmon_pwm_input:
530 *val = therm->fan_get(therm);
531 break;
532 default:
533 return -EOPNOTSUPP;
536 return 0;
539 static int
540 nouveau_power_read(struct device *dev, u32 attr, int channel, long *val)
542 struct drm_device *drm_dev = dev_get_drvdata(dev);
543 struct nouveau_drm *drm = nouveau_drm(drm_dev);
544 struct nvkm_iccsense *iccsense = nvxx_iccsense(&drm->client.device);
546 if (!iccsense)
547 return -EOPNOTSUPP;
549 switch (attr) {
550 case hwmon_power_input:
551 *val = nvkm_iccsense_read_all(iccsense);
552 break;
553 case hwmon_power_max:
554 *val = iccsense->power_w_max;
555 break;
556 case hwmon_power_crit:
557 *val = iccsense->power_w_crit;
558 break;
559 default:
560 return -EOPNOTSUPP;
563 return 0;
566 static int
567 nouveau_temp_write(struct device *dev, u32 attr, int channel, long val)
569 struct drm_device *drm_dev = dev_get_drvdata(dev);
570 struct nouveau_drm *drm = nouveau_drm(drm_dev);
571 struct nvkm_therm *therm = nvxx_therm(&drm->client.device);
573 if (!therm || !therm->attr_set)
574 return -EOPNOTSUPP;
576 switch (attr) {
577 case hwmon_temp_max:
578 return therm->attr_set(therm, NVKM_THERM_ATTR_THRS_DOWN_CLK,
579 val / 1000);
580 case hwmon_temp_max_hyst:
581 return therm->attr_set(therm, NVKM_THERM_ATTR_THRS_DOWN_CLK_HYST,
582 val / 1000);
583 case hwmon_temp_crit:
584 return therm->attr_set(therm, NVKM_THERM_ATTR_THRS_CRITICAL,
585 val / 1000);
586 case hwmon_temp_crit_hyst:
587 return therm->attr_set(therm, NVKM_THERM_ATTR_THRS_CRITICAL_HYST,
588 val / 1000);
589 case hwmon_temp_emergency:
590 return therm->attr_set(therm, NVKM_THERM_ATTR_THRS_SHUTDOWN,
591 val / 1000);
592 case hwmon_temp_emergency_hyst:
593 return therm->attr_set(therm, NVKM_THERM_ATTR_THRS_SHUTDOWN_HYST,
594 val / 1000);
595 default:
596 return -EOPNOTSUPP;
600 static int
601 nouveau_pwm_write(struct device *dev, u32 attr, int channel, long val)
603 struct drm_device *drm_dev = dev_get_drvdata(dev);
604 struct nouveau_drm *drm = nouveau_drm(drm_dev);
605 struct nvkm_therm *therm = nvxx_therm(&drm->client.device);
607 if (!therm || !therm->attr_set)
608 return -EOPNOTSUPP;
610 switch (attr) {
611 case hwmon_pwm_input:
612 return therm->fan_set(therm, val);
613 case hwmon_pwm_enable:
614 return therm->attr_set(therm, NVKM_THERM_ATTR_FAN_MODE, val);
615 default:
616 return -EOPNOTSUPP;
620 static umode_t
621 nouveau_is_visible(const void *data, enum hwmon_sensor_types type, u32 attr,
622 int channel)
624 switch (type) {
625 case hwmon_chip:
626 return nouveau_chip_is_visible(data, attr, channel);
627 case hwmon_temp:
628 return nouveau_temp_is_visible(data, attr, channel);
629 case hwmon_fan:
630 return nouveau_fan_is_visible(data, attr, channel);
631 case hwmon_in:
632 return nouveau_input_is_visible(data, attr, channel);
633 case hwmon_pwm:
634 return nouveau_pwm_is_visible(data, attr, channel);
635 case hwmon_power:
636 return nouveau_power_is_visible(data, attr, channel);
637 default:
638 return 0;
642 static const char input_label[] = "GPU core";
644 static int
645 nouveau_read_string(struct device *dev, enum hwmon_sensor_types type, u32 attr,
646 int channel, const char **buf)
648 if (type == hwmon_in && attr == hwmon_in_label) {
649 *buf = input_label;
650 return 0;
653 return -EOPNOTSUPP;
656 static int
657 nouveau_read(struct device *dev, enum hwmon_sensor_types type, u32 attr,
658 int channel, long *val)
660 switch (type) {
661 case hwmon_chip:
662 return nouveau_chip_read(dev, attr, channel, val);
663 case hwmon_temp:
664 return nouveau_temp_read(dev, attr, channel, val);
665 case hwmon_fan:
666 return nouveau_fan_read(dev, attr, channel, val);
667 case hwmon_in:
668 return nouveau_in_read(dev, attr, channel, val);
669 case hwmon_pwm:
670 return nouveau_pwm_read(dev, attr, channel, val);
671 case hwmon_power:
672 return nouveau_power_read(dev, attr, channel, val);
673 default:
674 return -EOPNOTSUPP;
678 static int
679 nouveau_write(struct device *dev, enum hwmon_sensor_types type, u32 attr,
680 int channel, long val)
682 switch (type) {
683 case hwmon_temp:
684 return nouveau_temp_write(dev, attr, channel, val);
685 case hwmon_pwm:
686 return nouveau_pwm_write(dev, attr, channel, val);
687 default:
688 return -EOPNOTSUPP;
692 static const struct hwmon_ops nouveau_hwmon_ops = {
693 .is_visible = nouveau_is_visible,
694 .read = nouveau_read,
695 .read_string = nouveau_read_string,
696 .write = nouveau_write,
699 static const struct hwmon_chip_info nouveau_chip_info = {
700 .ops = &nouveau_hwmon_ops,
701 .info = nouveau_info,
703 #endif
706 nouveau_hwmon_init(struct drm_device *dev)
708 #if defined(CONFIG_HWMON) || (defined(MODULE) && defined(CONFIG_HWMON_MODULE))
709 struct nouveau_drm *drm = nouveau_drm(dev);
710 struct nvkm_therm *therm = nvxx_therm(&drm->client.device);
711 const struct attribute_group *special_groups[N_ATTR_GROUPS];
712 struct nouveau_hwmon *hwmon;
713 struct device *hwmon_dev;
714 int ret = 0;
715 int i = 0;
717 hwmon = drm->hwmon = kzalloc(sizeof(*hwmon), GFP_KERNEL);
718 if (!hwmon)
719 return -ENOMEM;
720 hwmon->dev = dev;
722 if (therm && therm->attr_get && therm->attr_set) {
723 if (nvkm_therm_temp_get(therm) >= 0)
724 special_groups[i++] = &temp1_auto_point_sensor_group;
725 if (therm->fan_get && therm->fan_get(therm) >= 0)
726 special_groups[i++] = &pwm_fan_sensor_group;
729 special_groups[i] = 0;
730 hwmon_dev = hwmon_device_register_with_info(dev->dev, "nouveau", dev,
731 &nouveau_chip_info,
732 special_groups);
733 if (IS_ERR(hwmon_dev)) {
734 ret = PTR_ERR(hwmon_dev);
735 NV_ERROR(drm, "Unable to register hwmon device: %d\n", ret);
736 return ret;
739 hwmon->hwmon = hwmon_dev;
740 return 0;
741 #else
742 return 0;
743 #endif
746 void
747 nouveau_hwmon_fini(struct drm_device *dev)
749 #if defined(CONFIG_HWMON) || (defined(MODULE) && defined(CONFIG_HWMON_MODULE))
750 struct nouveau_hwmon *hwmon = nouveau_hwmon(dev);
752 if (hwmon->hwmon)
753 hwmon_device_unregister(hwmon->hwmon);
755 nouveau_drm(dev)->hwmon = NULL;
756 kfree(hwmon);
757 #endif