acpi thermal trip points increased to 12
[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         __ATTR(trip_point_10_type, 0444, trip_point_type_show, NULL),
200         __ATTR(trip_point_10_temp, 0444, trip_point_temp_show, NULL),
201         __ATTR(trip_point_11_type, 0444, trip_point_type_show, NULL),
202         __ATTR(trip_point_11_temp, 0444, trip_point_temp_show, NULL),
203 };
204
205 #define TRIP_POINT_ATTR_ADD(_dev, _index, result)     \
206 do {    \
207         result = device_create_file(_dev,       \
208                                 &trip_point_attrs[_index * 2]); \
209         if (result)     \
210                 break;  \
211         result = device_create_file(_dev,       \
212                         &trip_point_attrs[_index * 2 + 1]);     \
213 } while (0)
214
215 #define TRIP_POINT_ATTR_REMOVE(_dev, _index)    \
216 do {    \
217         device_remove_file(_dev, &trip_point_attrs[_index * 2]);        \
218         device_remove_file(_dev, &trip_point_attrs[_index * 2 + 1]);    \
219 } while (0)
220
221 /* sys I/F for cooling device */
222 #define to_cooling_device(_dev) \
223         container_of(_dev, struct thermal_cooling_device, device)
224
225 static ssize_t
226 thermal_cooling_device_type_show(struct device *dev,
227                                  struct device_attribute *attr, char *buf)
228 {
229         struct thermal_cooling_device *cdev = to_cooling_device(dev);
230
231         return sprintf(buf, "%s\n", cdev->type);
232 }
233
234 static ssize_t
235 thermal_cooling_device_max_state_show(struct device *dev,
236                                       struct device_attribute *attr, char *buf)
237 {
238         struct thermal_cooling_device *cdev = to_cooling_device(dev);
239
240         return cdev->ops->get_max_state(cdev, buf);
241 }
242
243 static ssize_t
244 thermal_cooling_device_cur_state_show(struct device *dev,
245                                       struct device_attribute *attr, char *buf)
246 {
247         struct thermal_cooling_device *cdev = to_cooling_device(dev);
248
249         return cdev->ops->get_cur_state(cdev, buf);
250 }
251
252 static ssize_t
253 thermal_cooling_device_cur_state_store(struct device *dev,
254                                        struct device_attribute *attr,
255                                        const char *buf, size_t count)
256 {
257         struct thermal_cooling_device *cdev = to_cooling_device(dev);
258         int state;
259         int result;
260
261         if (!sscanf(buf, "%d\n", &state))
262                 return -EINVAL;
263
264         if (state < 0)
265                 return -EINVAL;
266
267         result = cdev->ops->set_cur_state(cdev, state);
268         if (result)
269                 return result;
270         return count;
271 }
272
273 static struct device_attribute dev_attr_cdev_type =
274 __ATTR(type, 0444, thermal_cooling_device_type_show, NULL);
275 static DEVICE_ATTR(max_state, 0444,
276                    thermal_cooling_device_max_state_show, NULL);
277 static DEVICE_ATTR(cur_state, 0644,
278                    thermal_cooling_device_cur_state_show,
279                    thermal_cooling_device_cur_state_store);
280
281 static ssize_t
282 thermal_cooling_device_trip_point_show(struct device *dev,
283                                        struct device_attribute *attr, char *buf)
284 {
285         struct thermal_cooling_device_instance *instance;
286
287         instance =
288             container_of(attr, struct thermal_cooling_device_instance, attr);
289
290         if (instance->trip == THERMAL_TRIPS_NONE)
291                 return sprintf(buf, "-1\n");
292         else
293                 return sprintf(buf, "%d\n", instance->trip);
294 }
295
296 /* Device management */
297
298 /**
299  * thermal_zone_bind_cooling_device - bind a cooling device to a thermal zone
300  * @tz:         thermal zone device
301  * @trip:       indicates which trip point the cooling devices is
302  *              associated with in this thermal zone.
303  * @cdev:       thermal cooling device
304  *
305  * This function is usually called in the thermal zone device .bind callback.
306  */
307 int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz,
308                                      int trip,
309                                      struct thermal_cooling_device *cdev)
310 {
311         struct thermal_cooling_device_instance *dev;
312         struct thermal_cooling_device_instance *pos;
313         struct thermal_zone_device *pos1;
314         struct thermal_cooling_device *pos2;
315         int result;
316
317         if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE))
318                 return -EINVAL;
319
320         list_for_each_entry(pos1, &thermal_tz_list, node) {
321                 if (pos1 == tz)
322                         break;
323         }
324         list_for_each_entry(pos2, &thermal_cdev_list, node) {
325                 if (pos2 == cdev)
326                         break;
327         }
328
329         if (tz != pos1 || cdev != pos2)
330                 return -EINVAL;
331
332         dev =
333             kzalloc(sizeof(struct thermal_cooling_device_instance), GFP_KERNEL);
334         if (!dev)
335                 return -ENOMEM;
336         dev->tz = tz;
337         dev->cdev = cdev;
338         dev->trip = trip;
339         result = get_idr(&tz->idr, &tz->lock, &dev->id);
340         if (result)
341                 goto free_mem;
342
343         sprintf(dev->name, "cdev%d", dev->id);
344         result =
345             sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev->name);
346         if (result)
347                 goto release_idr;
348
349         sprintf(dev->attr_name, "cdev%d_trip_point", dev->id);
350         dev->attr.attr.name = dev->attr_name;
351         dev->attr.attr.mode = 0444;
352         dev->attr.show = thermal_cooling_device_trip_point_show;
353         result = device_create_file(&tz->device, &dev->attr);
354         if (result)
355                 goto remove_symbol_link;
356
357         mutex_lock(&tz->lock);
358         list_for_each_entry(pos, &tz->cooling_devices, node)
359             if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) {
360                 result = -EEXIST;
361                 break;
362         }
363         if (!result)
364                 list_add_tail(&dev->node, &tz->cooling_devices);
365         mutex_unlock(&tz->lock);
366
367         if (!result)
368                 return 0;
369
370         device_remove_file(&tz->device, &dev->attr);
371       remove_symbol_link:
372         sysfs_remove_link(&tz->device.kobj, dev->name);
373       release_idr:
374         release_idr(&tz->idr, &tz->lock, dev->id);
375       free_mem:
376         kfree(dev);
377         return result;
378 }
379
380 EXPORT_SYMBOL(thermal_zone_bind_cooling_device);
381
382 /**
383  * thermal_zone_unbind_cooling_device - unbind a cooling device from a thermal zone
384  * @tz:         thermal zone device
385  * @trip:       indicates which trip point the cooling devices is
386  *              associated with in this thermal zone.
387  * @cdev:       thermal cooling device
388  *
389  * This function is usually called in the thermal zone device .unbind callback.
390  */
391 int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz,
392                                        int trip,
393                                        struct thermal_cooling_device *cdev)
394 {
395         struct thermal_cooling_device_instance *pos, *next;
396
397         mutex_lock(&tz->lock);
398         list_for_each_entry_safe(pos, next, &tz->cooling_devices, node) {
399                 if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) {
400                         list_del(&pos->node);
401                         mutex_unlock(&tz->lock);
402                         goto unbind;
403                 }
404         }
405         mutex_unlock(&tz->lock);
406
407         return -ENODEV;
408
409       unbind:
410         device_remove_file(&tz->device, &pos->attr);
411         sysfs_remove_link(&tz->device.kobj, pos->name);
412         release_idr(&tz->idr, &tz->lock, pos->id);
413         kfree(pos);
414         return 0;
415 }
416
417 EXPORT_SYMBOL(thermal_zone_unbind_cooling_device);
418
419 static void thermal_release(struct device *dev)
420 {
421         struct thermal_zone_device *tz;
422         struct thermal_cooling_device *cdev;
423
424         if (!strncmp(dev->bus_id, "thermal_zone", sizeof "thermal_zone" - 1)) {
425                 tz = to_thermal_zone(dev);
426                 kfree(tz);
427         } else {
428                 cdev = to_cooling_device(dev);
429                 kfree(cdev);
430         }
431 }
432
433 static struct class thermal_class = {
434         .name = "thermal",
435         .dev_release = thermal_release,
436 };
437
438 /**
439  * thermal_cooling_device_register - register a new thermal cooling device
440  * @type:       the thermal cooling device type.
441  * @devdata:    device private data.
442  * @ops:                standard thermal cooling devices callbacks.
443  */
444 struct thermal_cooling_device *thermal_cooling_device_register(char *type,
445                                                                void *devdata,
446                                                                struct
447                                                                thermal_cooling_device_ops
448                                                                *ops)
449 {
450         struct thermal_cooling_device *cdev;
451         struct thermal_zone_device *pos;
452         int result;
453
454         if (strlen(type) >= THERMAL_NAME_LENGTH)
455                 return ERR_PTR(-EINVAL);
456
457         if (!ops || !ops->get_max_state || !ops->get_cur_state ||
458             !ops->set_cur_state)
459                 return ERR_PTR(-EINVAL);
460
461         cdev = kzalloc(sizeof(struct thermal_cooling_device), GFP_KERNEL);
462         if (!cdev)
463                 return ERR_PTR(-ENOMEM);
464
465         result = get_idr(&thermal_cdev_idr, &thermal_idr_lock, &cdev->id);
466         if (result) {
467                 kfree(cdev);
468                 return ERR_PTR(result);
469         }
470
471         strcpy(cdev->type, type);
472         cdev->ops = ops;
473         cdev->device.class = &thermal_class;
474         cdev->devdata = devdata;
475         sprintf(cdev->device.bus_id, "cooling_device%d", cdev->id);
476         result = device_register(&cdev->device);
477         if (result) {
478                 release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id);
479                 kfree(cdev);
480                 return ERR_PTR(result);
481         }
482
483         /* sys I/F */
484         if (type) {
485                 result = device_create_file(&cdev->device, &dev_attr_cdev_type);
486                 if (result)
487                         goto unregister;
488         }
489
490         result = device_create_file(&cdev->device, &dev_attr_max_state);
491         if (result)
492                 goto unregister;
493
494         result = device_create_file(&cdev->device, &dev_attr_cur_state);
495         if (result)
496                 goto unregister;
497
498         mutex_lock(&thermal_list_lock);
499         list_add(&cdev->node, &thermal_cdev_list);
500         list_for_each_entry(pos, &thermal_tz_list, node) {
501                 if (!pos->ops->bind)
502                         continue;
503                 result = pos->ops->bind(pos, cdev);
504                 if (result)
505                         break;
506
507         }
508         mutex_unlock(&thermal_list_lock);
509
510         if (!result)
511                 return cdev;
512
513       unregister:
514         release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id);
515         device_unregister(&cdev->device);
516         return ERR_PTR(result);
517 }
518
519 EXPORT_SYMBOL(thermal_cooling_device_register);
520
521 /**
522  * thermal_cooling_device_unregister - removes the registered thermal cooling device
523  * @cdev:       the thermal cooling device to remove.
524  *
525  * thermal_cooling_device_unregister() must be called when the device is no
526  * longer needed.
527  */
528 void thermal_cooling_device_unregister(struct
529                                        thermal_cooling_device
530                                        *cdev)
531 {
532         struct thermal_zone_device *tz;
533         struct thermal_cooling_device *pos = NULL;
534
535         if (!cdev)
536                 return;
537
538         mutex_lock(&thermal_list_lock);
539         list_for_each_entry(pos, &thermal_cdev_list, node)
540             if (pos == cdev)
541                 break;
542         if (pos != cdev) {
543                 /* thermal cooling device not found */
544                 mutex_unlock(&thermal_list_lock);
545                 return;
546         }
547         list_del(&cdev->node);
548         list_for_each_entry(tz, &thermal_tz_list, node) {
549                 if (!tz->ops->unbind)
550                         continue;
551                 tz->ops->unbind(tz, cdev);
552         }
553         mutex_unlock(&thermal_list_lock);
554         if (cdev->type[0])
555                 device_remove_file(&cdev->device, &dev_attr_cdev_type);
556         device_remove_file(&cdev->device, &dev_attr_max_state);
557         device_remove_file(&cdev->device, &dev_attr_cur_state);
558
559         release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id);
560         device_unregister(&cdev->device);
561         return;
562 }
563
564 EXPORT_SYMBOL(thermal_cooling_device_unregister);
565
566 /**
567  * thermal_zone_device_register - register a new thermal zone device
568  * @type:       the thermal zone device type
569  * @trips:      the number of trip points the thermal zone support
570  * @devdata:    private device data
571  * @ops:        standard thermal zone device callbacks
572  *
573  * thermal_zone_device_unregister() must be called when the device is no
574  * longer needed.
575  */
576 struct thermal_zone_device *thermal_zone_device_register(char *type,
577                                                          int trips,
578                                                          void *devdata, struct
579                                                          thermal_zone_device_ops
580                                                          *ops)
581 {
582         struct thermal_zone_device *tz;
583         struct thermal_cooling_device *pos;
584         int result;
585         int count;
586
587         if (strlen(type) >= THERMAL_NAME_LENGTH)
588                 return ERR_PTR(-EINVAL);
589
590         if (trips > THERMAL_MAX_TRIPS || trips < 0)
591                 return ERR_PTR(-EINVAL);
592
593         if (!ops || !ops->get_temp)
594                 return ERR_PTR(-EINVAL);
595
596         tz = kzalloc(sizeof(struct thermal_zone_device), GFP_KERNEL);
597         if (!tz)
598                 return ERR_PTR(-ENOMEM);
599
600         INIT_LIST_HEAD(&tz->cooling_devices);
601         idr_init(&tz->idr);
602         mutex_init(&tz->lock);
603         result = get_idr(&thermal_tz_idr, &thermal_idr_lock, &tz->id);
604         if (result) {
605                 kfree(tz);
606                 return ERR_PTR(result);
607         }
608
609         strcpy(tz->type, type);
610         tz->ops = ops;
611         tz->device.class = &thermal_class;
612         tz->devdata = devdata;
613         tz->trips = trips;
614         sprintf(tz->device.bus_id, "thermal_zone%d", tz->id);
615         result = device_register(&tz->device);
616         if (result) {
617                 release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id);
618                 kfree(tz);
619                 return ERR_PTR(result);
620         }
621
622         /* sys I/F */
623         if (type) {
624                 result = device_create_file(&tz->device, &dev_attr_type);
625                 if (result)
626                         goto unregister;
627         }
628
629         result = device_create_file(&tz->device, &dev_attr_temp);
630         if (result)
631                 goto unregister;
632
633         if (ops->get_mode) {
634                 result = device_create_file(&tz->device, &dev_attr_mode);
635                 if (result)
636                         goto unregister;
637         }
638
639         for (count = 0; count < trips; count++) {
640                 TRIP_POINT_ATTR_ADD(&tz->device, count, result);
641                 if (result)
642                         goto unregister;
643         }
644
645         mutex_lock(&thermal_list_lock);
646         list_add_tail(&tz->node, &thermal_tz_list);
647         if (ops->bind)
648                 list_for_each_entry(pos, &thermal_cdev_list, node) {
649                 result = ops->bind(tz, pos);
650                 if (result)
651                         break;
652                 }
653         mutex_unlock(&thermal_list_lock);
654
655         if (!result)
656                 return tz;
657
658       unregister:
659         release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id);
660         device_unregister(&tz->device);
661         return ERR_PTR(result);
662 }
663
664 EXPORT_SYMBOL(thermal_zone_device_register);
665
666 /**
667  * thermal_device_unregister - removes the registered thermal zone device
668  * @tz: the thermal zone device to remove
669  */
670 void thermal_zone_device_unregister(struct thermal_zone_device *tz)
671 {
672         struct thermal_cooling_device *cdev;
673         struct thermal_zone_device *pos = NULL;
674         int count;
675
676         if (!tz)
677                 return;
678
679         mutex_lock(&thermal_list_lock);
680         list_for_each_entry(pos, &thermal_tz_list, node)
681             if (pos == tz)
682                 break;
683         if (pos != tz) {
684                 /* thermal zone device not found */
685                 mutex_unlock(&thermal_list_lock);
686                 return;
687         }
688         list_del(&tz->node);
689         if (tz->ops->unbind)
690                 list_for_each_entry(cdev, &thermal_cdev_list, node)
691                     tz->ops->unbind(tz, cdev);
692         mutex_unlock(&thermal_list_lock);
693
694         if (tz->type[0])
695                 device_remove_file(&tz->device, &dev_attr_type);
696         device_remove_file(&tz->device, &dev_attr_temp);
697         if (tz->ops->get_mode)
698                 device_remove_file(&tz->device, &dev_attr_mode);
699
700         for (count = 0; count < tz->trips; count++)
701                 TRIP_POINT_ATTR_REMOVE(&tz->device, count);
702
703         release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id);
704         idr_destroy(&tz->idr);
705         mutex_destroy(&tz->lock);
706         device_unregister(&tz->device);
707         return;
708 }
709
710 EXPORT_SYMBOL(thermal_zone_device_unregister);
711
712 static int __init thermal_init(void)
713 {
714         int result = 0;
715
716         result = class_register(&thermal_class);
717         if (result) {
718                 idr_destroy(&thermal_tz_idr);
719                 idr_destroy(&thermal_cdev_idr);
720                 mutex_destroy(&thermal_idr_lock);
721                 mutex_destroy(&thermal_list_lock);
722         }
723         return result;
724 }
725
726 static void __exit thermal_exit(void)
727 {
728         class_unregister(&thermal_class);
729         idr_destroy(&thermal_tz_idr);
730         idr_destroy(&thermal_cdev_idr);
731         mutex_destroy(&thermal_idr_lock);
732         mutex_destroy(&thermal_list_lock);
733 }
734
735 subsys_initcall(thermal_init);
736 module_exit(thermal_exit);