8b86e53ccf7a081586d32d09350dce072f2ef75e
[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         struct thermal_zone_device *pos1;
310         struct thermal_cooling_device *pos2;
311         int result;
312
313         if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE))
314                 return -EINVAL;
315
316         list_for_each_entry(pos1, &thermal_tz_list, node) {
317                 if (pos1 == tz)
318                         break;
319         }
320         list_for_each_entry(pos2, &thermal_cdev_list, node) {
321                 if (pos2 == cdev)
322                         break;
323         }
324
325         if (tz != pos1 || cdev != pos2)
326                 return -EINVAL;
327
328         dev =
329             kzalloc(sizeof(struct thermal_cooling_device_instance), GFP_KERNEL);
330         if (!dev)
331                 return -ENOMEM;
332         dev->tz = tz;
333         dev->cdev = cdev;
334         dev->trip = trip;
335         result = get_idr(&tz->idr, &tz->lock, &dev->id);
336         if (result)
337                 goto free_mem;
338
339         sprintf(dev->name, "cdev%d", dev->id);
340         result =
341             sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev->name);
342         if (result)
343                 goto release_idr;
344
345         sprintf(dev->attr_name, "cdev%d_trip_point", dev->id);
346         dev->attr.attr.name = dev->attr_name;
347         dev->attr.attr.mode = 0444;
348         dev->attr.show = thermal_cooling_device_trip_point_show;
349         result = device_create_file(&tz->device, &dev->attr);
350         if (result)
351                 goto remove_symbol_link;
352
353         mutex_lock(&tz->lock);
354         list_for_each_entry(pos, &tz->cooling_devices, node)
355             if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) {
356                 result = -EEXIST;
357                 break;
358         }
359         if (!result)
360                 list_add_tail(&dev->node, &tz->cooling_devices);
361         mutex_unlock(&tz->lock);
362
363         if (!result)
364                 return 0;
365
366         device_remove_file(&tz->device, &dev->attr);
367       remove_symbol_link:
368         sysfs_remove_link(&tz->device.kobj, dev->name);
369       release_idr:
370         release_idr(&tz->idr, &tz->lock, dev->id);
371       free_mem:
372         kfree(dev);
373         return result;
374 }
375
376 EXPORT_SYMBOL(thermal_zone_bind_cooling_device);
377
378 /**
379  * thermal_zone_unbind_cooling_device - unbind a cooling device from a thermal zone
380  * @tz:         thermal zone device
381  * @trip:       indicates which trip point the cooling devices is
382  *              associated with in this thermal zone.
383  * @cdev:       thermal cooling device
384  *
385  * This function is usually called in the thermal zone device .unbind callback.
386  */
387 int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz,
388                                        int trip,
389                                        struct thermal_cooling_device *cdev)
390 {
391         struct thermal_cooling_device_instance *pos, *next;
392
393         mutex_lock(&tz->lock);
394         list_for_each_entry_safe(pos, next, &tz->cooling_devices, node) {
395                 if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) {
396                         list_del(&pos->node);
397                         mutex_unlock(&tz->lock);
398                         goto unbind;
399                 }
400         }
401         mutex_unlock(&tz->lock);
402
403         return -ENODEV;
404
405       unbind:
406         device_remove_file(&tz->device, &pos->attr);
407         sysfs_remove_link(&tz->device.kobj, pos->name);
408         release_idr(&tz->idr, &tz->lock, pos->id);
409         kfree(pos);
410         return 0;
411 }
412
413 EXPORT_SYMBOL(thermal_zone_unbind_cooling_device);
414
415 static void thermal_release(struct device *dev)
416 {
417         struct thermal_zone_device *tz;
418         struct thermal_cooling_device *cdev;
419
420         if (!strncmp(dev->bus_id, "thermal_zone", sizeof "thermal_zone" - 1)) {
421                 tz = to_thermal_zone(dev);
422                 kfree(tz);
423         } else {
424                 cdev = to_cooling_device(dev);
425                 kfree(cdev);
426         }
427 }
428
429 static struct class thermal_class = {
430         .name = "thermal",
431         .dev_release = thermal_release,
432 };
433
434 /**
435  * thermal_cooling_device_register - register a new thermal cooling device
436  * @type:       the thermal cooling device type.
437  * @devdata:    device private data.
438  * @ops:                standard thermal cooling devices callbacks.
439  */
440 struct thermal_cooling_device *thermal_cooling_device_register(char *type,
441                                                                void *devdata,
442                                                                struct
443                                                                thermal_cooling_device_ops
444                                                                *ops)
445 {
446         struct thermal_cooling_device *cdev;
447         struct thermal_zone_device *pos;
448         int result;
449
450         if (strlen(type) >= THERMAL_NAME_LENGTH)
451                 return ERR_PTR(-EINVAL);
452
453         if (!ops || !ops->get_max_state || !ops->get_cur_state ||
454             !ops->set_cur_state)
455                 return ERR_PTR(-EINVAL);
456
457         cdev = kzalloc(sizeof(struct thermal_cooling_device), GFP_KERNEL);
458         if (!cdev)
459                 return ERR_PTR(-ENOMEM);
460
461         result = get_idr(&thermal_cdev_idr, &thermal_idr_lock, &cdev->id);
462         if (result) {
463                 kfree(cdev);
464                 return ERR_PTR(result);
465         }
466
467         strcpy(cdev->type, type);
468         cdev->ops = ops;
469         cdev->device.class = &thermal_class;
470         cdev->devdata = devdata;
471         sprintf(cdev->device.bus_id, "cooling_device%d", cdev->id);
472         result = device_register(&cdev->device);
473         if (result) {
474                 release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id);
475                 kfree(cdev);
476                 return ERR_PTR(result);
477         }
478
479         /* sys I/F */
480         if (type) {
481                 result = device_create_file(&cdev->device, &dev_attr_cdev_type);
482                 if (result)
483                         goto unregister;
484         }
485
486         result = device_create_file(&cdev->device, &dev_attr_max_state);
487         if (result)
488                 goto unregister;
489
490         result = device_create_file(&cdev->device, &dev_attr_cur_state);
491         if (result)
492                 goto unregister;
493
494         mutex_lock(&thermal_list_lock);
495         list_add(&cdev->node, &thermal_cdev_list);
496         list_for_each_entry(pos, &thermal_tz_list, node) {
497                 if (!pos->ops->bind)
498                         continue;
499                 result = pos->ops->bind(pos, cdev);
500                 if (result)
501                         break;
502
503         }
504         mutex_unlock(&thermal_list_lock);
505
506         if (!result)
507                 return cdev;
508
509       unregister:
510         release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id);
511         device_unregister(&cdev->device);
512         return ERR_PTR(result);
513 }
514
515 EXPORT_SYMBOL(thermal_cooling_device_register);
516
517 /**
518  * thermal_cooling_device_unregister - removes the registered thermal cooling device
519  * @cdev:       the thermal cooling device to remove.
520  *
521  * thermal_cooling_device_unregister() must be called when the device is no
522  * longer needed.
523  */
524 void thermal_cooling_device_unregister(struct
525                                        thermal_cooling_device
526                                        *cdev)
527 {
528         struct thermal_zone_device *tz;
529         struct thermal_cooling_device *pos = NULL;
530
531         if (!cdev)
532                 return;
533
534         mutex_lock(&thermal_list_lock);
535         list_for_each_entry(pos, &thermal_cdev_list, node)
536             if (pos == cdev)
537                 break;
538         if (pos != cdev) {
539                 /* thermal cooling device not found */
540                 mutex_unlock(&thermal_list_lock);
541                 return;
542         }
543         list_del(&cdev->node);
544         list_for_each_entry(tz, &thermal_tz_list, node) {
545                 if (!tz->ops->unbind)
546                         continue;
547                 tz->ops->unbind(tz, cdev);
548         }
549         mutex_unlock(&thermal_list_lock);
550         if (cdev->type[0])
551                 device_remove_file(&cdev->device, &dev_attr_cdev_type);
552         device_remove_file(&cdev->device, &dev_attr_max_state);
553         device_remove_file(&cdev->device, &dev_attr_cur_state);
554
555         release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id);
556         device_unregister(&cdev->device);
557         return;
558 }
559
560 EXPORT_SYMBOL(thermal_cooling_device_unregister);
561
562 /**
563  * thermal_zone_device_register - register a new thermal zone device
564  * @type:       the thermal zone device type
565  * @trips:      the number of trip points the thermal zone support
566  * @devdata:    private device data
567  * @ops:        standard thermal zone device callbacks
568  *
569  * thermal_zone_device_unregister() must be called when the device is no
570  * longer needed.
571  */
572 struct thermal_zone_device *thermal_zone_device_register(char *type,
573                                                          int trips,
574                                                          void *devdata, struct
575                                                          thermal_zone_device_ops
576                                                          *ops)
577 {
578         struct thermal_zone_device *tz;
579         struct thermal_cooling_device *pos;
580         int result;
581         int count;
582
583         if (strlen(type) >= THERMAL_NAME_LENGTH)
584                 return ERR_PTR(-EINVAL);
585
586         if (trips > THERMAL_MAX_TRIPS || trips < 0)
587                 return ERR_PTR(-EINVAL);
588
589         if (!ops || !ops->get_temp)
590                 return ERR_PTR(-EINVAL);
591
592         tz = kzalloc(sizeof(struct thermal_zone_device), GFP_KERNEL);
593         if (!tz)
594                 return ERR_PTR(-ENOMEM);
595
596         INIT_LIST_HEAD(&tz->cooling_devices);
597         idr_init(&tz->idr);
598         mutex_init(&tz->lock);
599         result = get_idr(&thermal_tz_idr, &thermal_idr_lock, &tz->id);
600         if (result) {
601                 kfree(tz);
602                 return ERR_PTR(result);
603         }
604
605         strcpy(tz->type, type);
606         tz->ops = ops;
607         tz->device.class = &thermal_class;
608         tz->devdata = devdata;
609         tz->trips = trips;
610         sprintf(tz->device.bus_id, "thermal_zone%d", tz->id);
611         result = device_register(&tz->device);
612         if (result) {
613                 release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id);
614                 kfree(tz);
615                 return ERR_PTR(result);
616         }
617
618         /* sys I/F */
619         if (type) {
620                 result = device_create_file(&tz->device, &dev_attr_type);
621                 if (result)
622                         goto unregister;
623         }
624
625         result = device_create_file(&tz->device, &dev_attr_temp);
626         if (result)
627                 goto unregister;
628
629         if (ops->get_mode) {
630                 result = device_create_file(&tz->device, &dev_attr_mode);
631                 if (result)
632                         goto unregister;
633         }
634
635         for (count = 0; count < trips; count++) {
636                 TRIP_POINT_ATTR_ADD(&tz->device, count, result);
637                 if (result)
638                         goto unregister;
639         }
640
641         mutex_lock(&thermal_list_lock);
642         list_add_tail(&tz->node, &thermal_tz_list);
643         if (ops->bind)
644                 list_for_each_entry(pos, &thermal_cdev_list, node) {
645                 result = ops->bind(tz, pos);
646                 if (result)
647                         break;
648                 }
649         mutex_unlock(&thermal_list_lock);
650
651         if (!result)
652                 return tz;
653
654       unregister:
655         release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id);
656         device_unregister(&tz->device);
657         return ERR_PTR(result);
658 }
659
660 EXPORT_SYMBOL(thermal_zone_device_register);
661
662 /**
663  * thermal_device_unregister - removes the registered thermal zone device
664  * @tz: the thermal zone device to remove
665  */
666 void thermal_zone_device_unregister(struct thermal_zone_device *tz)
667 {
668         struct thermal_cooling_device *cdev;
669         struct thermal_zone_device *pos = NULL;
670         int count;
671
672         if (!tz)
673                 return;
674
675         mutex_lock(&thermal_list_lock);
676         list_for_each_entry(pos, &thermal_tz_list, node)
677             if (pos == tz)
678                 break;
679         if (pos != tz) {
680                 /* thermal zone device not found */
681                 mutex_unlock(&thermal_list_lock);
682                 return;
683         }
684         list_del(&tz->node);
685         if (tz->ops->unbind)
686                 list_for_each_entry(cdev, &thermal_cdev_list, node)
687                     tz->ops->unbind(tz, cdev);
688         mutex_unlock(&thermal_list_lock);
689
690         if (tz->type[0])
691                 device_remove_file(&tz->device, &dev_attr_type);
692         device_remove_file(&tz->device, &dev_attr_temp);
693         if (tz->ops->get_mode)
694                 device_remove_file(&tz->device, &dev_attr_mode);
695
696         for (count = 0; count < tz->trips; count++)
697                 TRIP_POINT_ATTR_REMOVE(&tz->device, count);
698
699         release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id);
700         idr_destroy(&tz->idr);
701         mutex_destroy(&tz->lock);
702         device_unregister(&tz->device);
703         return;
704 }
705
706 EXPORT_SYMBOL(thermal_zone_device_unregister);
707
708 static int __init thermal_init(void)
709 {
710         int result = 0;
711
712         result = class_register(&thermal_class);
713         if (result) {
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         return result;
720 }
721
722 static void __exit thermal_exit(void)
723 {
724         class_unregister(&thermal_class);
725         idr_destroy(&thermal_tz_idr);
726         idr_destroy(&thermal_cdev_idr);
727         mutex_destroy(&thermal_idr_lock);
728         mutex_destroy(&thermal_list_lock);
729 }
730
731 subsys_initcall(thermal_init);
732 module_exit(thermal_exit);