ACPI: thermal: syntax, spelling, kernel-doc
[linux-2.6.git] / drivers / thermal / thermal.c
1 /*
2  *  thermal.c - Generic Thermal Management Sysfs support.
3  *
4  *  Copyright (C) 2008 Intel Corp
5  *  Copyright (C) 2008 Zhang Rui <rui.zhang@intel.com>
6  *  Copyright (C) 2008 Sujith Thomas <sujith.thomas@intel.com>
7  *
8  *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
9  *
10  *  This program is free software; you can redistribute it and/or modify
11  *  it under the terms of the GNU General Public License as published by
12  *  the Free Software Foundation; version 2 of the License.
13  *
14  *  This program is distributed in the hope that it will be useful, but
15  *  WITHOUT ANY WARRANTY; without even the implied warranty of
16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
17  *  General Public License for more details.
18  *
19  *  You should have received a copy of the GNU General Public License along
20  *  with this program; if not, write to the Free Software Foundation, Inc.,
21  *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
22  *
23  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
24  */
25
26 #include <linux/module.h>
27 #include <linux/device.h>
28 #include <linux/err.h>
29 #include <linux/kdev_t.h>
30 #include <linux/idr.h>
31 #include <linux/thermal.h>
32 #include <linux/spinlock.h>
33
34 MODULE_AUTHOR("Zhang Rui")
35 MODULE_DESCRIPTION("Generic thermal management sysfs support");
36 MODULE_LICENSE("GPL");
37
38 #define PREFIX "Thermal: "
39
40 struct thermal_cooling_device_instance {
41         int id;
42         char name[THERMAL_NAME_LENGTH];
43         struct thermal_zone_device *tz;
44         struct thermal_cooling_device *cdev;
45         int trip;
46         char attr_name[THERMAL_NAME_LENGTH];
47         struct device_attribute attr;
48         struct list_head node;
49 };
50
51 static DEFINE_IDR(thermal_tz_idr);
52 static DEFINE_IDR(thermal_cdev_idr);
53 static DEFINE_MUTEX(thermal_idr_lock);
54
55 static LIST_HEAD(thermal_tz_list);
56 static LIST_HEAD(thermal_cdev_list);
57 static DEFINE_MUTEX(thermal_list_lock);
58
59 static int get_idr(struct idr *idr, struct mutex *lock, int *id)
60 {
61         int err;
62
63       again:
64         if (unlikely(idr_pre_get(idr, GFP_KERNEL) == 0))
65                 return -ENOMEM;
66
67         if (lock)
68                 mutex_lock(lock);
69         err = idr_get_new(idr, NULL, id);
70         if (lock)
71                 mutex_unlock(lock);
72         if (unlikely(err == -EAGAIN))
73                 goto again;
74         else if (unlikely(err))
75                 return err;
76
77         *id = *id & MAX_ID_MASK;
78         return 0;
79 }
80
81 static void release_idr(struct idr *idr, struct mutex *lock, int id)
82 {
83         if (lock)
84                 mutex_lock(lock);
85         idr_remove(idr, id);
86         if (lock)
87                 mutex_unlock(lock);
88 }
89
90 /* sys I/F for thermal zone */
91
92 #define to_thermal_zone(_dev) \
93         container_of(_dev, struct thermal_zone_device, device)
94
95 static ssize_t
96 type_show(struct device *dev, struct device_attribute *attr, char *buf)
97 {
98         struct thermal_zone_device *tz = to_thermal_zone(dev);
99
100         return sprintf(buf, "%s\n", tz->type);
101 }
102
103 static ssize_t
104 temp_show(struct device *dev, struct device_attribute *attr, char *buf)
105 {
106         struct thermal_zone_device *tz = to_thermal_zone(dev);
107
108         if (!tz->ops->get_temp)
109                 return -EPERM;
110
111         return tz->ops->get_temp(tz, buf);
112 }
113
114 static ssize_t
115 mode_show(struct device *dev, struct device_attribute *attr, char *buf)
116 {
117         struct thermal_zone_device *tz = to_thermal_zone(dev);
118
119         if (!tz->ops->get_mode)
120                 return -EPERM;
121
122         return tz->ops->get_mode(tz, buf);
123 }
124
125 static ssize_t
126 mode_store(struct device *dev, struct device_attribute *attr,
127            const char *buf, size_t count)
128 {
129         struct thermal_zone_device *tz = to_thermal_zone(dev);
130         int result;
131
132         if (!tz->ops->set_mode)
133                 return -EPERM;
134
135         result = tz->ops->set_mode(tz, buf);
136         if (result)
137                 return result;
138
139         return count;
140 }
141
142 static ssize_t
143 trip_point_type_show(struct device *dev, struct device_attribute *attr,
144                      char *buf)
145 {
146         struct thermal_zone_device *tz = to_thermal_zone(dev);
147         int trip;
148
149         if (!tz->ops->get_trip_type)
150                 return -EPERM;
151
152         if (!sscanf(attr->attr.name, "trip_point_%d_type", &trip))
153                 return -EINVAL;
154
155         return tz->ops->get_trip_type(tz, trip, buf);
156 }
157
158 static ssize_t
159 trip_point_temp_show(struct device *dev, struct device_attribute *attr,
160                      char *buf)
161 {
162         struct thermal_zone_device *tz = to_thermal_zone(dev);
163         int trip;
164
165         if (!tz->ops->get_trip_temp)
166                 return -EPERM;
167
168         if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip))
169                 return -EINVAL;
170
171         return tz->ops->get_trip_temp(tz, trip, buf);
172 }
173
174 static DEVICE_ATTR(type, 0444, type_show, NULL);
175 static DEVICE_ATTR(temp, 0444, temp_show, NULL);
176 static DEVICE_ATTR(mode, 0644, mode_show, mode_store);
177
178 static struct device_attribute trip_point_attrs[] = {
179         __ATTR(trip_point_0_type, 0444, trip_point_type_show, NULL),
180         __ATTR(trip_point_0_temp, 0444, trip_point_temp_show, NULL),
181         __ATTR(trip_point_1_type, 0444, trip_point_type_show, NULL),
182         __ATTR(trip_point_1_temp, 0444, trip_point_temp_show, NULL),
183         __ATTR(trip_point_2_type, 0444, trip_point_type_show, NULL),
184         __ATTR(trip_point_2_temp, 0444, trip_point_temp_show, NULL),
185         __ATTR(trip_point_3_type, 0444, trip_point_type_show, NULL),
186         __ATTR(trip_point_3_temp, 0444, trip_point_temp_show, NULL),
187         __ATTR(trip_point_4_type, 0444, trip_point_type_show, NULL),
188         __ATTR(trip_point_4_temp, 0444, trip_point_temp_show, NULL),
189         __ATTR(trip_point_5_type, 0444, trip_point_type_show, NULL),
190         __ATTR(trip_point_5_temp, 0444, trip_point_temp_show, NULL),
191         __ATTR(trip_point_6_type, 0444, trip_point_type_show, NULL),
192         __ATTR(trip_point_6_temp, 0444, trip_point_temp_show, NULL),
193         __ATTR(trip_point_7_type, 0444, trip_point_type_show, NULL),
194         __ATTR(trip_point_7_temp, 0444, trip_point_temp_show, NULL),
195         __ATTR(trip_point_8_type, 0444, trip_point_type_show, NULL),
196         __ATTR(trip_point_8_temp, 0444, trip_point_temp_show, NULL),
197         __ATTR(trip_point_9_type, 0444, trip_point_type_show, NULL),
198         __ATTR(trip_point_9_temp, 0444, trip_point_temp_show, NULL),
199 };
200
201 #define TRIP_POINT_ATTR_ADD(_dev, _index, result)     \
202 do {    \
203         result = device_create_file(_dev,       \
204                                 &trip_point_attrs[_index * 2]); \
205         if (result)     \
206                 break;  \
207         result = device_create_file(_dev,       \
208                         &trip_point_attrs[_index * 2 + 1]);     \
209 } while (0)
210
211 #define TRIP_POINT_ATTR_REMOVE(_dev, _index)    \
212 do {    \
213         device_remove_file(_dev, &trip_point_attrs[_index * 2]);        \
214         device_remove_file(_dev, &trip_point_attrs[_index * 2 + 1]);    \
215 } while (0)
216
217 /* sys I/F for cooling device */
218 #define to_cooling_device(_dev) \
219         container_of(_dev, struct thermal_cooling_device, device)
220
221 static ssize_t
222 thermal_cooling_device_type_show(struct device *dev,
223                                  struct device_attribute *attr, char *buf)
224 {
225         struct thermal_cooling_device *cdev = to_cooling_device(dev);
226
227         return sprintf(buf, "%s\n", cdev->type);
228 }
229
230 static ssize_t
231 thermal_cooling_device_max_state_show(struct device *dev,
232                                       struct device_attribute *attr, char *buf)
233 {
234         struct thermal_cooling_device *cdev = to_cooling_device(dev);
235
236         return cdev->ops->get_max_state(cdev, buf);
237 }
238
239 static ssize_t
240 thermal_cooling_device_cur_state_show(struct device *dev,
241                                       struct device_attribute *attr, char *buf)
242 {
243         struct thermal_cooling_device *cdev = to_cooling_device(dev);
244
245         return cdev->ops->get_cur_state(cdev, buf);
246 }
247
248 static ssize_t
249 thermal_cooling_device_cur_state_store(struct device *dev,
250                                        struct device_attribute *attr,
251                                        const char *buf, size_t count)
252 {
253         struct thermal_cooling_device *cdev = to_cooling_device(dev);
254         int state;
255         int result;
256
257         if (!sscanf(buf, "%d\n", &state))
258                 return -EINVAL;
259
260         if (state < 0)
261                 return -EINVAL;
262
263         result = cdev->ops->set_cur_state(cdev, state);
264         if (result)
265                 return result;
266         return count;
267 }
268
269 static struct device_attribute dev_attr_cdev_type =
270 __ATTR(type, 0444, thermal_cooling_device_type_show, NULL);
271 static DEVICE_ATTR(max_state, 0444,
272                    thermal_cooling_device_max_state_show, NULL);
273 static DEVICE_ATTR(cur_state, 0644,
274                    thermal_cooling_device_cur_state_show,
275                    thermal_cooling_device_cur_state_store);
276
277 static ssize_t
278 thermal_cooling_device_trip_point_show(struct device *dev,
279                                        struct device_attribute *attr, char *buf)
280 {
281         struct thermal_cooling_device_instance *instance;
282
283         instance =
284             container_of(attr, struct thermal_cooling_device_instance, attr);
285
286         if (instance->trip == THERMAL_TRIPS_NONE)
287                 return sprintf(buf, "-1\n");
288         else
289                 return sprintf(buf, "%d\n", instance->trip);
290 }
291
292 /* Device management */
293
294 /**
295  * thermal_zone_bind_cooling_device - bind a cooling device to a thermal zone
296  * @tz:         thermal zone device
297  * @trip:       indicates which trip point the cooling devices is
298  *              associated with in this thermal zone.
299  * @cdev:       thermal cooling device
300  *
301  * This function is usually called in the thermal zone device .bind callback.
302  */
303 int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz,
304                                      int trip,
305                                      struct thermal_cooling_device *cdev)
306 {
307         struct thermal_cooling_device_instance *dev;
308         struct thermal_cooling_device_instance *pos;
309         int result;
310
311         if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE))
312                 return -EINVAL;
313
314         if (!tz || !cdev)
315                 return -EINVAL;
316
317         dev =
318             kzalloc(sizeof(struct thermal_cooling_device_instance), GFP_KERNEL);
319         if (!dev)
320                 return -ENOMEM;
321         dev->tz = tz;
322         dev->cdev = cdev;
323         dev->trip = trip;
324         result = get_idr(&tz->idr, &tz->lock, &dev->id);
325         if (result)
326                 goto free_mem;
327
328         sprintf(dev->name, "cdev%d", dev->id);
329         result =
330             sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev->name);
331         if (result)
332                 goto release_idr;
333
334         sprintf(dev->attr_name, "cdev%d_trip_point", dev->id);
335         dev->attr.attr.name = dev->attr_name;
336         dev->attr.attr.mode = 0444;
337         dev->attr.show = thermal_cooling_device_trip_point_show;
338         result = device_create_file(&tz->device, &dev->attr);
339         if (result)
340                 goto remove_symbol_link;
341
342         mutex_lock(&tz->lock);
343         list_for_each_entry(pos, &tz->cooling_devices, node)
344             if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) {
345                 result = -EEXIST;
346                 break;
347         }
348         if (!result)
349                 list_add_tail(&dev->node, &tz->cooling_devices);
350         mutex_unlock(&tz->lock);
351
352         if (!result)
353                 return 0;
354
355         device_remove_file(&tz->device, &dev->attr);
356       remove_symbol_link:
357         sysfs_remove_link(&tz->device.kobj, dev->name);
358       release_idr:
359         release_idr(&tz->idr, &tz->lock, dev->id);
360       free_mem:
361         kfree(dev);
362         return result;
363 }
364
365 EXPORT_SYMBOL(thermal_zone_bind_cooling_device);
366
367 /**
368  * thermal_zone_unbind_cooling_device - unbind a cooling device from a thermal zone
369  * @tz:         thermal zone device
370  * @trip:       indicates which trip point the cooling devices is
371  *              associated with in this thermal zone.
372  * @cdev:       thermal cooling device
373  *
374  * This function is usually called in the thermal zone device .unbind callback.
375  */
376 int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz,
377                                        int trip,
378                                        struct thermal_cooling_device *cdev)
379 {
380         struct thermal_cooling_device_instance *pos, *next;
381
382         mutex_lock(&tz->lock);
383         list_for_each_entry_safe(pos, next, &tz->cooling_devices, node) {
384                 if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) {
385                         list_del(&pos->node);
386                         mutex_unlock(&tz->lock);
387                         goto unbind;
388                 }
389         }
390         mutex_unlock(&tz->lock);
391
392         return -ENODEV;
393
394       unbind:
395         device_remove_file(&tz->device, &pos->attr);
396         sysfs_remove_link(&tz->device.kobj, pos->name);
397         release_idr(&tz->idr, &tz->lock, pos->id);
398         kfree(pos);
399         return 0;
400 }
401
402 EXPORT_SYMBOL(thermal_zone_unbind_cooling_device);
403
404 static void thermal_release(struct device *dev)
405 {
406         struct thermal_zone_device *tz;
407         struct thermal_cooling_device *cdev;
408
409         if (!strncmp(dev->bus_id, "thermal_zone", sizeof "thermal_zone" - 1)) {
410                 tz = to_thermal_zone(dev);
411                 kfree(tz);
412         } else {
413                 cdev = to_cooling_device(dev);
414                 kfree(cdev);
415         }
416 }
417
418 static struct class thermal_class = {
419         .name = "thermal",
420         .dev_release = thermal_release,
421 };
422
423 /**
424  * thermal_cooling_device_register - register a new thermal cooling device
425  * @type:       the thermal cooling device type.
426  * @devdata:    device private data.
427  * @ops:                standard thermal cooling devices callbacks.
428  */
429 struct thermal_cooling_device *thermal_cooling_device_register(char *type,
430                                                                void *devdata,
431                                                                struct
432                                                                thermal_cooling_device_ops
433                                                                *ops)
434 {
435         struct thermal_cooling_device *cdev;
436         struct thermal_zone_device *pos;
437         int result;
438
439         if (strlen(type) >= THERMAL_NAME_LENGTH)
440                 return NULL;
441
442         if (!ops || !ops->get_max_state || !ops->get_cur_state ||
443             !ops->set_cur_state)
444                 return NULL;
445
446         cdev = kzalloc(sizeof(struct thermal_cooling_device), GFP_KERNEL);
447         if (!cdev)
448                 return NULL;
449
450         result = get_idr(&thermal_cdev_idr, &thermal_idr_lock, &cdev->id);
451         if (result) {
452                 kfree(cdev);
453                 return NULL;
454         }
455
456         strcpy(cdev->type, type);
457         cdev->ops = ops;
458         cdev->device.class = &thermal_class;
459         cdev->devdata = devdata;
460         sprintf(cdev->device.bus_id, "cooling_device%d", cdev->id);
461         result = device_register(&cdev->device);
462         if (result) {
463                 release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id);
464                 kfree(cdev);
465                 return NULL;
466         }
467
468         /* sys I/F */
469         if (type) {
470                 result = device_create_file(&cdev->device, &dev_attr_cdev_type);
471                 if (result)
472                         goto unregister;
473         }
474
475         result = device_create_file(&cdev->device, &dev_attr_max_state);
476         if (result)
477                 goto unregister;
478
479         result = device_create_file(&cdev->device, &dev_attr_cur_state);
480         if (result)
481                 goto unregister;
482
483         mutex_lock(&thermal_list_lock);
484         list_add(&cdev->node, &thermal_cdev_list);
485         list_for_each_entry(pos, &thermal_tz_list, node) {
486                 if (!pos->ops->bind)
487                         continue;
488                 result = pos->ops->bind(pos, cdev);
489                 if (result)
490                         break;
491
492         }
493         mutex_unlock(&thermal_list_lock);
494
495         if (!result)
496                 return cdev;
497
498       unregister:
499         release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id);
500         device_unregister(&cdev->device);
501         return NULL;
502 }
503
504 EXPORT_SYMBOL(thermal_cooling_device_register);
505
506 /**
507  * thermal_cooling_device_unregister - removes the registered thermal cooling device
508  * @cdev:       the thermal cooling device to remove.
509  *
510  * thermal_cooling_device_unregister() must be called when the device is no
511  * longer needed.
512  */
513 void thermal_cooling_device_unregister(struct
514                                        thermal_cooling_device
515                                        *cdev)
516 {
517         struct thermal_zone_device *tz;
518         struct thermal_cooling_device *pos = NULL;
519
520         if (!cdev)
521                 return;
522
523         mutex_lock(&thermal_list_lock);
524         list_for_each_entry(pos, &thermal_cdev_list, node)
525             if (pos == cdev)
526                 break;
527         if (pos != cdev) {
528                 /* thermal cooling device not found */
529                 mutex_unlock(&thermal_list_lock);
530                 return;
531         }
532         list_del(&cdev->node);
533         list_for_each_entry(tz, &thermal_tz_list, node) {
534                 if (!tz->ops->unbind)
535                         continue;
536                 tz->ops->unbind(tz, cdev);
537         }
538         mutex_unlock(&thermal_list_lock);
539         if (cdev->type[0])
540                 device_remove_file(&cdev->device, &dev_attr_cdev_type);
541         device_remove_file(&cdev->device, &dev_attr_max_state);
542         device_remove_file(&cdev->device, &dev_attr_cur_state);
543
544         release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id);
545         device_unregister(&cdev->device);
546         return;
547 }
548
549 EXPORT_SYMBOL(thermal_cooling_device_unregister);
550
551 /**
552  * thermal_zone_device_register - register a new thermal zone device
553  * @type:       the thermal zone device type
554  * @trips:      the number of trip points the thermal zone support
555  * @devdata:    private device data
556  * @ops:        standard thermal zone device callbacks
557  *
558  * thermal_zone_device_unregister() must be called when the device is no
559  * longer needed.
560  */
561 struct thermal_zone_device *thermal_zone_device_register(char *type,
562                                                          int trips,
563                                                          void *devdata, struct
564                                                          thermal_zone_device_ops
565                                                          *ops)
566 {
567         struct thermal_zone_device *tz;
568         struct thermal_cooling_device *pos;
569         int result;
570         int count;
571
572         if (strlen(type) >= THERMAL_NAME_LENGTH)
573                 return NULL;
574
575         if (trips > THERMAL_MAX_TRIPS || trips < 0)
576                 return NULL;
577
578         if (!ops || !ops->get_temp)
579                 return NULL;
580
581         tz = kzalloc(sizeof(struct thermal_zone_device), GFP_KERNEL);
582         if (!tz)
583                 return NULL;
584
585         INIT_LIST_HEAD(&tz->cooling_devices);
586         idr_init(&tz->idr);
587         mutex_init(&tz->lock);
588         result = get_idr(&thermal_tz_idr, &thermal_idr_lock, &tz->id);
589         if (result) {
590                 kfree(tz);
591                 return NULL;
592         }
593
594         strcpy(tz->type, type);
595         tz->ops = ops;
596         tz->device.class = &thermal_class;
597         tz->devdata = devdata;
598         tz->trips = trips;
599         sprintf(tz->device.bus_id, "thermal_zone%d", tz->id);
600         result = device_register(&tz->device);
601         if (result) {
602                 release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id);
603                 kfree(tz);
604                 return NULL;
605         }
606
607         /* sys I/F */
608         if (type) {
609                 result = device_create_file(&tz->device, &dev_attr_type);
610                 if (result)
611                         goto unregister;
612         }
613
614         result = device_create_file(&tz->device, &dev_attr_temp);
615         if (result)
616                 goto unregister;
617
618         if (ops->get_mode) {
619                 result = device_create_file(&tz->device, &dev_attr_mode);
620                 if (result)
621                         goto unregister;
622         }
623
624         for (count = 0; count < trips; count++) {
625                 TRIP_POINT_ATTR_ADD(&tz->device, count, result);
626                 if (result)
627                         goto unregister;
628         }
629
630         mutex_lock(&thermal_list_lock);
631         list_add_tail(&tz->node, &thermal_tz_list);
632         if (ops->bind)
633                 list_for_each_entry(pos, &thermal_cdev_list, node) {
634                 result = ops->bind(tz, pos);
635                 if (result)
636                         break;
637                 }
638         mutex_unlock(&thermal_list_lock);
639
640         if (!result)
641                 return tz;
642
643       unregister:
644         release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id);
645         device_unregister(&tz->device);
646         return NULL;
647 }
648
649 EXPORT_SYMBOL(thermal_zone_device_register);
650
651 /**
652  * thermal_device_unregister - removes the registered thermal zone device
653  * @tz: the thermal zone device to remove
654  */
655 void thermal_zone_device_unregister(struct thermal_zone_device *tz)
656 {
657         struct thermal_cooling_device *cdev;
658         struct thermal_zone_device *pos = NULL;
659         int count;
660
661         if (!tz)
662                 return;
663
664         mutex_lock(&thermal_list_lock);
665         list_for_each_entry(pos, &thermal_tz_list, node)
666             if (pos == tz)
667                 break;
668         if (pos != tz) {
669                 /* thermal zone device not found */
670                 mutex_unlock(&thermal_list_lock);
671                 return;
672         }
673         list_del(&tz->node);
674         if (tz->ops->unbind)
675                 list_for_each_entry(cdev, &thermal_cdev_list, node)
676                     tz->ops->unbind(tz, cdev);
677         mutex_unlock(&thermal_list_lock);
678
679         if (tz->type[0])
680                 device_remove_file(&tz->device, &dev_attr_type);
681         device_remove_file(&tz->device, &dev_attr_temp);
682         if (tz->ops->get_mode)
683                 device_remove_file(&tz->device, &dev_attr_mode);
684
685         for (count = 0; count < tz->trips; count++)
686                 TRIP_POINT_ATTR_REMOVE(&tz->device, count);
687
688         release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id);
689         idr_destroy(&tz->idr);
690         mutex_destroy(&tz->lock);
691         device_unregister(&tz->device);
692         return;
693 }
694
695 EXPORT_SYMBOL(thermal_zone_device_unregister);
696
697 static int __init thermal_init(void)
698 {
699         int result = 0;
700
701         result = class_register(&thermal_class);
702         if (result) {
703                 idr_destroy(&thermal_tz_idr);
704                 idr_destroy(&thermal_cdev_idr);
705                 mutex_destroy(&thermal_idr_lock);
706                 mutex_destroy(&thermal_list_lock);
707         }
708         return result;
709 }
710
711 static void __exit thermal_exit(void)
712 {
713         class_unregister(&thermal_class);
714         idr_destroy(&thermal_tz_idr);
715         idr_destroy(&thermal_cdev_idr);
716         mutex_destroy(&thermal_idr_lock);
717         mutex_destroy(&thermal_list_lock);
718 }
719
720 subsys_initcall(thermal_init);
721 module_exit(thermal_exit);