Commit | Line | Data |
---|---|---|
203d3d4a ZR |
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 | * | |
203d3d4a ZR |
8 | * This program is free software; you can redistribute it and/or modify |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; version 2 of the License. | |
203d3d4a ZR |
11 | */ |
12 | ||
c5a01dd5 JP |
13 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
14 | ||
203d3d4a ZR |
15 | #include <linux/module.h> |
16 | #include <linux/device.h> | |
17 | #include <linux/err.h> | |
5a0e3ad6 | 18 | #include <linux/slab.h> |
203d3d4a ZR |
19 | #include <linux/kdev_t.h> |
20 | #include <linux/idr.h> | |
21 | #include <linux/thermal.h> | |
b1569e99 | 22 | #include <linux/reboot.h> |
42a5bf50 | 23 | #include <linux/string.h> |
a116b5d4 | 24 | #include <linux/of.h> |
4cb18728 D |
25 | #include <net/netlink.h> |
26 | #include <net/genetlink.h> | |
ff140fea | 27 | #include <linux/suspend.h> |
203d3d4a | 28 | |
100a8fdb PA |
29 | #define CREATE_TRACE_POINTS |
30 | #include <trace/events/thermal.h> | |
31 | ||
71350db4 | 32 | #include "thermal_core.h" |
0dd88793 | 33 | #include "thermal_hwmon.h" |
71350db4 | 34 | |
63c4ec90 | 35 | MODULE_AUTHOR("Zhang Rui"); |
203d3d4a | 36 | MODULE_DESCRIPTION("Generic thermal management sysfs support"); |
6d8d4974 | 37 | MODULE_LICENSE("GPL v2"); |
203d3d4a | 38 | |
203d3d4a ZR |
39 | static DEFINE_IDR(thermal_tz_idr); |
40 | static DEFINE_IDR(thermal_cdev_idr); | |
41 | static DEFINE_MUTEX(thermal_idr_lock); | |
42 | ||
43 | static LIST_HEAD(thermal_tz_list); | |
44 | static LIST_HEAD(thermal_cdev_list); | |
a4a15485 D |
45 | static LIST_HEAD(thermal_governor_list); |
46 | ||
203d3d4a | 47 | static DEFINE_MUTEX(thermal_list_lock); |
a4a15485 D |
48 | static DEFINE_MUTEX(thermal_governor_lock); |
49 | ||
ff140fea ZR |
50 | static atomic_t in_suspend; |
51 | ||
f2234bcd ZR |
52 | static struct thermal_governor *def_governor; |
53 | ||
1b4f4849 EV |
54 | /* |
55 | * Governor section: set of functions to handle thermal governors | |
56 | * | |
57 | * Functions to help in the life cycle of thermal governors within | |
58 | * the thermal core and by the thermal governor code. | |
59 | */ | |
60 | ||
a4a15485 D |
61 | static struct thermal_governor *__find_governor(const char *name) |
62 | { | |
63 | struct thermal_governor *pos; | |
64 | ||
f2234bcd ZR |
65 | if (!name || !name[0]) |
66 | return def_governor; | |
67 | ||
a4a15485 | 68 | list_for_each_entry(pos, &thermal_governor_list, governor_list) |
484ac2f3 | 69 | if (!strncasecmp(name, pos->name, THERMAL_NAME_LENGTH)) |
a4a15485 D |
70 | return pos; |
71 | ||
72 | return NULL; | |
73 | } | |
74 | ||
e33df1d2 JM |
75 | /** |
76 | * bind_previous_governor() - bind the previous governor of the thermal zone | |
77 | * @tz: a valid pointer to a struct thermal_zone_device | |
78 | * @failed_gov_name: the name of the governor that failed to register | |
79 | * | |
80 | * Register the previous governor of the thermal zone after a new | |
81 | * governor has failed to be bound. | |
82 | */ | |
83 | static void bind_previous_governor(struct thermal_zone_device *tz, | |
84 | const char *failed_gov_name) | |
85 | { | |
86 | if (tz->governor && tz->governor->bind_to_tz) { | |
87 | if (tz->governor->bind_to_tz(tz)) { | |
88 | dev_err(&tz->device, | |
89 | "governor %s failed to bind and the previous one (%s) failed to bind again, thermal zone %s has no governor\n", | |
90 | failed_gov_name, tz->governor->name, tz->type); | |
91 | tz->governor = NULL; | |
92 | } | |
93 | } | |
94 | } | |
95 | ||
96 | /** | |
97 | * thermal_set_governor() - Switch to another governor | |
98 | * @tz: a valid pointer to a struct thermal_zone_device | |
99 | * @new_gov: pointer to the new governor | |
100 | * | |
101 | * Change the governor of thermal zone @tz. | |
102 | * | |
103 | * Return: 0 on success, an error if the new governor's bind_to_tz() failed. | |
104 | */ | |
105 | static int thermal_set_governor(struct thermal_zone_device *tz, | |
106 | struct thermal_governor *new_gov) | |
107 | { | |
108 | int ret = 0; | |
109 | ||
110 | if (tz->governor && tz->governor->unbind_from_tz) | |
111 | tz->governor->unbind_from_tz(tz); | |
112 | ||
113 | if (new_gov && new_gov->bind_to_tz) { | |
114 | ret = new_gov->bind_to_tz(tz); | |
115 | if (ret) { | |
116 | bind_previous_governor(tz, new_gov->name); | |
117 | ||
118 | return ret; | |
119 | } | |
120 | } | |
121 | ||
122 | tz->governor = new_gov; | |
123 | ||
124 | return ret; | |
125 | } | |
126 | ||
a4a15485 D |
127 | int thermal_register_governor(struct thermal_governor *governor) |
128 | { | |
129 | int err; | |
130 | const char *name; | |
131 | struct thermal_zone_device *pos; | |
132 | ||
133 | if (!governor) | |
134 | return -EINVAL; | |
135 | ||
136 | mutex_lock(&thermal_governor_lock); | |
137 | ||
138 | err = -EBUSY; | |
5027ba36 | 139 | if (!__find_governor(governor->name)) { |
a4a15485 D |
140 | err = 0; |
141 | list_add(&governor->governor_list, &thermal_governor_list); | |
f2234bcd ZR |
142 | if (!def_governor && !strncmp(governor->name, |
143 | DEFAULT_THERMAL_GOVERNOR, THERMAL_NAME_LENGTH)) | |
144 | def_governor = governor; | |
a4a15485 D |
145 | } |
146 | ||
147 | mutex_lock(&thermal_list_lock); | |
148 | ||
149 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
f2234bcd ZR |
150 | /* |
151 | * only thermal zones with specified tz->tzp->governor_name | |
152 | * may run with tz->govenor unset | |
153 | */ | |
a4a15485 D |
154 | if (pos->governor) |
155 | continue; | |
f2234bcd ZR |
156 | |
157 | name = pos->tzp->governor_name; | |
158 | ||
e33df1d2 JM |
159 | if (!strncasecmp(name, governor->name, THERMAL_NAME_LENGTH)) { |
160 | int ret; | |
161 | ||
162 | ret = thermal_set_governor(pos, governor); | |
163 | if (ret) | |
164 | dev_err(&pos->device, | |
165 | "Failed to set governor %s for thermal zone %s: %d\n", | |
166 | governor->name, pos->type, ret); | |
167 | } | |
a4a15485 D |
168 | } |
169 | ||
170 | mutex_unlock(&thermal_list_lock); | |
171 | mutex_unlock(&thermal_governor_lock); | |
172 | ||
173 | return err; | |
174 | } | |
a4a15485 D |
175 | |
176 | void thermal_unregister_governor(struct thermal_governor *governor) | |
177 | { | |
178 | struct thermal_zone_device *pos; | |
179 | ||
180 | if (!governor) | |
181 | return; | |
182 | ||
183 | mutex_lock(&thermal_governor_lock); | |
184 | ||
5027ba36 | 185 | if (!__find_governor(governor->name)) |
a4a15485 D |
186 | goto exit; |
187 | ||
188 | mutex_lock(&thermal_list_lock); | |
189 | ||
190 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
484ac2f3 | 191 | if (!strncasecmp(pos->governor->name, governor->name, |
a4a15485 | 192 | THERMAL_NAME_LENGTH)) |
e33df1d2 | 193 | thermal_set_governor(pos, NULL); |
a4a15485 D |
194 | } |
195 | ||
196 | mutex_unlock(&thermal_list_lock); | |
197 | list_del(&governor->governor_list); | |
198 | exit: | |
199 | mutex_unlock(&thermal_governor_lock); | |
200 | return; | |
201 | } | |
203d3d4a | 202 | |
1b4f4849 EV |
203 | int thermal_zone_device_set_policy(struct thermal_zone_device *tz, |
204 | char *policy) | |
205 | { | |
206 | struct thermal_governor *gov; | |
207 | int ret = -EINVAL; | |
208 | ||
209 | mutex_lock(&thermal_governor_lock); | |
210 | mutex_lock(&tz->lock); | |
211 | ||
212 | gov = __find_governor(strim(policy)); | |
213 | if (!gov) | |
214 | goto exit; | |
215 | ||
216 | ret = thermal_set_governor(tz, gov); | |
217 | ||
218 | exit: | |
219 | mutex_unlock(&tz->lock); | |
220 | mutex_unlock(&thermal_governor_lock); | |
221 | ||
222 | return ret; | |
223 | } | |
224 | ||
225 | int thermal_build_list_of_policies(char *buf) | |
226 | { | |
227 | struct thermal_governor *pos; | |
228 | ssize_t count = 0; | |
229 | ssize_t size = PAGE_SIZE; | |
230 | ||
231 | mutex_lock(&thermal_governor_lock); | |
232 | ||
233 | list_for_each_entry(pos, &thermal_governor_list, governor_list) { | |
234 | size = PAGE_SIZE - count; | |
235 | count += scnprintf(buf + count, size, "%s ", pos->name); | |
236 | } | |
237 | count += scnprintf(buf + count, size, "\n"); | |
238 | ||
239 | mutex_unlock(&thermal_governor_lock); | |
240 | ||
241 | return count; | |
242 | } | |
243 | ||
244 | static int __init thermal_register_governors(void) | |
245 | { | |
246 | int result; | |
247 | ||
248 | result = thermal_gov_step_wise_register(); | |
249 | if (result) | |
250 | return result; | |
251 | ||
252 | result = thermal_gov_fair_share_register(); | |
253 | if (result) | |
254 | return result; | |
255 | ||
256 | result = thermal_gov_bang_bang_register(); | |
257 | if (result) | |
258 | return result; | |
259 | ||
260 | result = thermal_gov_user_space_register(); | |
261 | if (result) | |
262 | return result; | |
263 | ||
264 | return thermal_gov_power_allocator_register(); | |
265 | } | |
266 | ||
267 | static void thermal_unregister_governors(void) | |
268 | { | |
269 | thermal_gov_step_wise_unregister(); | |
270 | thermal_gov_fair_share_unregister(); | |
271 | thermal_gov_bang_bang_unregister(); | |
272 | thermal_gov_user_space_unregister(); | |
273 | thermal_gov_power_allocator_unregister(); | |
274 | } | |
275 | ||
8772e185 EV |
276 | /* |
277 | * Zone update section: main control loop applied to each zone while monitoring | |
278 | * | |
279 | * in polling mode. The monitoring is done using a workqueue. | |
280 | * Same update may be done on a zone by calling thermal_zone_device_update(). | |
281 | * | |
282 | * An update means: | |
283 | * - Non-critical trips will invoke the governor responsible for that zone; | |
284 | * - Hot trips will produce a notification to userspace; | |
285 | * - Critical trip point will cause a system shutdown. | |
286 | */ | |
0c01ebbf D |
287 | static void thermal_zone_device_set_polling(struct thermal_zone_device *tz, |
288 | int delay) | |
289 | { | |
290 | if (delay > 1000) | |
291 | mod_delayed_work(system_freezable_wq, &tz->poll_queue, | |
292 | round_jiffies(msecs_to_jiffies(delay))); | |
293 | else if (delay) | |
294 | mod_delayed_work(system_freezable_wq, &tz->poll_queue, | |
295 | msecs_to_jiffies(delay)); | |
296 | else | |
297 | cancel_delayed_work(&tz->poll_queue); | |
298 | } | |
299 | ||
300 | static void monitor_thermal_zone(struct thermal_zone_device *tz) | |
301 | { | |
302 | mutex_lock(&tz->lock); | |
303 | ||
304 | if (tz->passive) | |
305 | thermal_zone_device_set_polling(tz, tz->passive_delay); | |
306 | else if (tz->polling_delay) | |
307 | thermal_zone_device_set_polling(tz, tz->polling_delay); | |
308 | else | |
309 | thermal_zone_device_set_polling(tz, 0); | |
310 | ||
311 | mutex_unlock(&tz->lock); | |
312 | } | |
313 | ||
314 | static void handle_non_critical_trips(struct thermal_zone_device *tz, | |
315 | int trip, enum thermal_trip_type trip_type) | |
316 | { | |
f2234bcd ZR |
317 | tz->governor ? tz->governor->throttle(tz, trip) : |
318 | def_governor->throttle(tz, trip); | |
0c01ebbf D |
319 | } |
320 | ||
321 | static void handle_critical_trips(struct thermal_zone_device *tz, | |
322 | int trip, enum thermal_trip_type trip_type) | |
323 | { | |
17e8351a | 324 | int trip_temp; |
0c01ebbf D |
325 | |
326 | tz->ops->get_trip_temp(tz, trip, &trip_temp); | |
327 | ||
328 | /* If we have not crossed the trip_temp, we do not care. */ | |
84ffe3ec | 329 | if (trip_temp <= 0 || tz->temperature < trip_temp) |
0c01ebbf D |
330 | return; |
331 | ||
208cd822 PA |
332 | trace_thermal_zone_trip(tz, trip, trip_type); |
333 | ||
0c01ebbf D |
334 | if (tz->ops->notify) |
335 | tz->ops->notify(tz, trip, trip_type); | |
336 | ||
337 | if (trip_type == THERMAL_TRIP_CRITICAL) { | |
923e0b1e EV |
338 | dev_emerg(&tz->device, |
339 | "critical temperature reached(%d C),shutting down\n", | |
340 | tz->temperature / 1000); | |
0c01ebbf D |
341 | orderly_poweroff(true); |
342 | } | |
343 | } | |
344 | ||
345 | static void handle_thermal_trip(struct thermal_zone_device *tz, int trip) | |
346 | { | |
347 | enum thermal_trip_type type; | |
348 | ||
81ad4276 ZR |
349 | /* Ignore disabled trip points */ |
350 | if (test_bit(trip, &tz->trips_disabled)) | |
351 | return; | |
352 | ||
0c01ebbf D |
353 | tz->ops->get_trip_type(tz, trip, &type); |
354 | ||
355 | if (type == THERMAL_TRIP_CRITICAL || type == THERMAL_TRIP_HOT) | |
356 | handle_critical_trips(tz, trip, type); | |
357 | else | |
358 | handle_non_critical_trips(tz, trip, type); | |
359 | /* | |
360 | * Alright, we handled this trip successfully. | |
361 | * So, start monitoring again. | |
362 | */ | |
363 | monitor_thermal_zone(tz); | |
364 | } | |
365 | ||
366 | static void update_temperature(struct thermal_zone_device *tz) | |
367 | { | |
17e8351a | 368 | int temp, ret; |
0c01ebbf | 369 | |
e6e238c3 | 370 | ret = thermal_zone_get_temp(tz, &temp); |
0c01ebbf | 371 | if (ret) { |
7e497a73 HG |
372 | if (ret != -EAGAIN) |
373 | dev_warn(&tz->device, | |
374 | "failed to read out thermal zone (%d)\n", | |
375 | ret); | |
e6e238c3 | 376 | return; |
0c01ebbf D |
377 | } |
378 | ||
e6e238c3 | 379 | mutex_lock(&tz->lock); |
0c01ebbf D |
380 | tz->last_temperature = tz->temperature; |
381 | tz->temperature = temp; | |
0c01ebbf | 382 | mutex_unlock(&tz->lock); |
06475b55 | 383 | |
100a8fdb | 384 | trace_thermal_temperature(tz); |
bb431ba2 ZR |
385 | if (tz->last_temperature == THERMAL_TEMP_INVALID) |
386 | dev_dbg(&tz->device, "last_temperature N/A, current_temperature=%d\n", | |
387 | tz->temperature); | |
388 | else | |
389 | dev_dbg(&tz->device, "last_temperature=%d, current_temperature=%d\n", | |
390 | tz->last_temperature, tz->temperature); | |
391 | } | |
392 | ||
393 | static void thermal_zone_device_reset(struct thermal_zone_device *tz) | |
394 | { | |
395 | struct thermal_instance *pos; | |
396 | ||
397 | tz->temperature = THERMAL_TEMP_INVALID; | |
398 | tz->passive = 0; | |
399 | list_for_each_entry(pos, &tz->thermal_instances, tz_node) | |
400 | pos->initialized = false; | |
0c01ebbf D |
401 | } |
402 | ||
0e70f466 SP |
403 | void thermal_zone_device_update(struct thermal_zone_device *tz, |
404 | enum thermal_notify_event event) | |
0c01ebbf D |
405 | { |
406 | int count; | |
407 | ||
ff140fea ZR |
408 | if (atomic_read(&in_suspend)) |
409 | return; | |
410 | ||
81bd4e1c EV |
411 | if (!tz->ops->get_temp) |
412 | return; | |
413 | ||
0c01ebbf D |
414 | update_temperature(tz); |
415 | ||
060c034a SH |
416 | thermal_zone_set_trips(tz); |
417 | ||
0e70f466 SP |
418 | tz->notify_event = event; |
419 | ||
0c01ebbf D |
420 | for (count = 0; count < tz->trips; count++) |
421 | handle_thermal_trip(tz, count); | |
422 | } | |
910cb1e3 | 423 | EXPORT_SYMBOL_GPL(thermal_zone_device_update); |
0c01ebbf | 424 | |
106339ab EV |
425 | /** |
426 | * thermal_notify_framework - Sensor drivers use this API to notify framework | |
427 | * @tz: thermal zone device | |
428 | * @trip: indicates which trip point has been crossed | |
429 | * | |
430 | * This function handles the trip events from sensor drivers. It starts | |
431 | * throttling the cooling devices according to the policy configured. | |
432 | * For CRITICAL and HOT trip points, this notifies the respective drivers, | |
433 | * and does actual throttling for other trip points i.e ACTIVE and PASSIVE. | |
434 | * The throttling policy is based on the configured platform data; if no | |
435 | * platform data is provided, this uses the step_wise throttling policy. | |
436 | */ | |
437 | void thermal_notify_framework(struct thermal_zone_device *tz, int trip) | |
438 | { | |
439 | handle_thermal_trip(tz, trip); | |
440 | } | |
441 | EXPORT_SYMBOL_GPL(thermal_notify_framework); | |
442 | ||
0c01ebbf D |
443 | static void thermal_zone_device_check(struct work_struct *work) |
444 | { | |
445 | struct thermal_zone_device *tz = container_of(work, struct | |
446 | thermal_zone_device, | |
447 | poll_queue.work); | |
0e70f466 | 448 | thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED); |
0c01ebbf D |
449 | } |
450 | ||
712afbdf EV |
451 | /* |
452 | * Power actor section: interface to power actors to estimate power | |
453 | * | |
454 | * Set of functions used to interact to cooling devices that know | |
455 | * how to estimate their devices power consumption. | |
456 | */ | |
457 | ||
1a7e7cc0 EV |
458 | /** |
459 | * power_actor_get_max_power() - get the maximum power that a cdev can consume | |
460 | * @cdev: pointer to &thermal_cooling_device | |
461 | * @tz: a valid thermal zone device pointer | |
462 | * @max_power: pointer in which to store the maximum power | |
463 | * | |
464 | * Calculate the maximum power consumption in milliwats that the | |
465 | * cooling device can currently consume and store it in @max_power. | |
466 | * | |
467 | * Return: 0 on success, -EINVAL if @cdev doesn't support the | |
468 | * power_actor API or -E* on other error. | |
469 | */ | |
470 | int power_actor_get_max_power(struct thermal_cooling_device *cdev, | |
471 | struct thermal_zone_device *tz, u32 *max_power) | |
472 | { | |
473 | if (!cdev_is_power_actor(cdev)) | |
474 | return -EINVAL; | |
475 | ||
476 | return cdev->ops->state2power(cdev, tz, 0, max_power); | |
477 | } | |
478 | ||
479 | /** | |
480 | * power_actor_get_min_power() - get the mainimum power that a cdev can consume | |
481 | * @cdev: pointer to &thermal_cooling_device | |
482 | * @tz: a valid thermal zone device pointer | |
483 | * @min_power: pointer in which to store the minimum power | |
484 | * | |
485 | * Calculate the minimum power consumption in milliwatts that the | |
486 | * cooling device can currently consume and store it in @min_power. | |
487 | * | |
488 | * Return: 0 on success, -EINVAL if @cdev doesn't support the | |
489 | * power_actor API or -E* on other error. | |
490 | */ | |
491 | int power_actor_get_min_power(struct thermal_cooling_device *cdev, | |
492 | struct thermal_zone_device *tz, u32 *min_power) | |
493 | { | |
494 | unsigned long max_state; | |
495 | int ret; | |
496 | ||
497 | if (!cdev_is_power_actor(cdev)) | |
498 | return -EINVAL; | |
499 | ||
500 | ret = cdev->ops->get_max_state(cdev, &max_state); | |
501 | if (ret) | |
502 | return ret; | |
503 | ||
504 | return cdev->ops->state2power(cdev, tz, max_state, min_power); | |
505 | } | |
506 | ||
507 | /** | |
508 | * power_actor_set_power() - limit the maximum power a cooling device consumes | |
509 | * @cdev: pointer to &thermal_cooling_device | |
510 | * @instance: thermal instance to update | |
511 | * @power: the power in milliwatts | |
512 | * | |
513 | * Set the cooling device to consume at most @power milliwatts. The limit is | |
514 | * expected to be a cap at the maximum power consumption. | |
515 | * | |
516 | * Return: 0 on success, -EINVAL if the cooling device does not | |
517 | * implement the power actor API or -E* for other failures. | |
518 | */ | |
519 | int power_actor_set_power(struct thermal_cooling_device *cdev, | |
520 | struct thermal_instance *instance, u32 power) | |
521 | { | |
522 | unsigned long state; | |
523 | int ret; | |
524 | ||
525 | if (!cdev_is_power_actor(cdev)) | |
526 | return -EINVAL; | |
527 | ||
528 | ret = cdev->ops->power2state(cdev, instance->tz, power, &state); | |
529 | if (ret) | |
530 | return ret; | |
531 | ||
532 | instance->target = state; | |
533 | mutex_lock(&cdev->lock); | |
534 | cdev->updated = false; | |
535 | mutex_unlock(&cdev->lock); | |
536 | thermal_cdev_update(cdev); | |
537 | ||
538 | return 0; | |
539 | } | |
540 | ||
3d0055d2 EV |
541 | void thermal_zone_device_rebind_exception(struct thermal_zone_device *tz, |
542 | const char *cdev_type, size_t size) | |
543 | { | |
544 | struct thermal_cooling_device *cdev = NULL; | |
545 | ||
546 | mutex_lock(&thermal_list_lock); | |
547 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
548 | /* skip non matching cdevs */ | |
549 | if (strncmp(cdev_type, cdev->type, size)) | |
550 | continue; | |
551 | ||
552 | /* re binding the exception matching the type pattern */ | |
553 | thermal_zone_bind_cooling_device(tz, THERMAL_TRIPS_NONE, cdev, | |
554 | THERMAL_NO_LIMIT, | |
555 | THERMAL_NO_LIMIT, | |
556 | THERMAL_WEIGHT_DEFAULT); | |
557 | } | |
558 | mutex_unlock(&thermal_list_lock); | |
559 | } | |
560 | ||
561 | void thermal_zone_device_unbind_exception(struct thermal_zone_device *tz, | |
562 | const char *cdev_type, size_t size) | |
563 | { | |
564 | struct thermal_cooling_device *cdev = NULL; | |
565 | ||
566 | mutex_lock(&thermal_list_lock); | |
567 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
568 | /* skip non matching cdevs */ | |
569 | if (strncmp(cdev_type, cdev->type, size)) | |
570 | continue; | |
571 | /* unbinding the exception matching the type pattern */ | |
572 | thermal_zone_unbind_cooling_device(tz, THERMAL_TRIPS_NONE, | |
573 | cdev); | |
574 | } | |
575 | mutex_unlock(&thermal_list_lock); | |
576 | } | |
577 | ||
81193e2e EV |
578 | /* |
579 | * Device management section: cooling devices, zones devices, and binding | |
580 | * | |
581 | * Set of functions provided by the thermal core for: | |
582 | * - cooling devices lifecycle: registration, unregistration, | |
583 | * binding, and unbinding. | |
584 | * - thermal zone devices lifecycle: registration, unregistration, | |
585 | * binding, and unbinding. | |
586 | */ | |
c30176fc EV |
587 | static int get_idr(struct idr *idr, struct mutex *lock, int *id) |
588 | { | |
589 | int ret; | |
590 | ||
591 | if (lock) | |
592 | mutex_lock(lock); | |
593 | ret = idr_alloc(idr, NULL, 0, 0, GFP_KERNEL); | |
594 | if (lock) | |
595 | mutex_unlock(lock); | |
596 | if (unlikely(ret < 0)) | |
597 | return ret; | |
598 | *id = ret; | |
599 | return 0; | |
600 | } | |
601 | ||
602 | static void release_idr(struct idr *idr, struct mutex *lock, int id) | |
603 | { | |
604 | if (lock) | |
605 | mutex_lock(lock); | |
606 | idr_remove(idr, id); | |
607 | if (lock) | |
608 | mutex_unlock(lock); | |
609 | } | |
610 | ||
203d3d4a | 611 | /** |
d2e4eb83 EV |
612 | * thermal_zone_bind_cooling_device() - bind a cooling device to a thermal zone |
613 | * @tz: pointer to struct thermal_zone_device | |
203d3d4a ZR |
614 | * @trip: indicates which trip point the cooling devices is |
615 | * associated with in this thermal zone. | |
d2e4eb83 EV |
616 | * @cdev: pointer to struct thermal_cooling_device |
617 | * @upper: the Maximum cooling state for this trip point. | |
618 | * THERMAL_NO_LIMIT means no upper limit, | |
619 | * and the cooling device can be in max_state. | |
620 | * @lower: the Minimum cooling state can be used for this trip point. | |
621 | * THERMAL_NO_LIMIT means no lower limit, | |
622 | * and the cooling device can be in cooling state 0. | |
6cd9e9f6 KS |
623 | * @weight: The weight of the cooling device to be bound to the |
624 | * thermal zone. Use THERMAL_WEIGHT_DEFAULT for the | |
625 | * default value | |
543a9561 | 626 | * |
d2e4eb83 EV |
627 | * This interface function bind a thermal cooling device to the certain trip |
628 | * point of a thermal zone device. | |
543a9561 | 629 | * This function is usually called in the thermal zone device .bind callback. |
d2e4eb83 EV |
630 | * |
631 | * Return: 0 on success, the proper error value otherwise. | |
203d3d4a ZR |
632 | */ |
633 | int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, | |
634 | int trip, | |
9d99842f | 635 | struct thermal_cooling_device *cdev, |
6cd9e9f6 KS |
636 | unsigned long upper, unsigned long lower, |
637 | unsigned int weight) | |
203d3d4a | 638 | { |
b81b6ba3 ZR |
639 | struct thermal_instance *dev; |
640 | struct thermal_instance *pos; | |
c7516709 TS |
641 | struct thermal_zone_device *pos1; |
642 | struct thermal_cooling_device *pos2; | |
74051ba5 | 643 | unsigned long max_state; |
9a3031dc | 644 | int result, ret; |
203d3d4a | 645 | |
543a9561 | 646 | if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE)) |
203d3d4a ZR |
647 | return -EINVAL; |
648 | ||
c7516709 TS |
649 | list_for_each_entry(pos1, &thermal_tz_list, node) { |
650 | if (pos1 == tz) | |
651 | break; | |
652 | } | |
653 | list_for_each_entry(pos2, &thermal_cdev_list, node) { | |
654 | if (pos2 == cdev) | |
655 | break; | |
656 | } | |
657 | ||
658 | if (tz != pos1 || cdev != pos2) | |
203d3d4a ZR |
659 | return -EINVAL; |
660 | ||
9a3031dc LM |
661 | ret = cdev->ops->get_max_state(cdev, &max_state); |
662 | if (ret) | |
663 | return ret; | |
9d99842f ZR |
664 | |
665 | /* lower default 0, upper default max_state */ | |
666 | lower = lower == THERMAL_NO_LIMIT ? 0 : lower; | |
667 | upper = upper == THERMAL_NO_LIMIT ? max_state : upper; | |
668 | ||
669 | if (lower > upper || upper > max_state) | |
670 | return -EINVAL; | |
671 | ||
203d3d4a | 672 | dev = |
b81b6ba3 | 673 | kzalloc(sizeof(struct thermal_instance), GFP_KERNEL); |
203d3d4a ZR |
674 | if (!dev) |
675 | return -ENOMEM; | |
676 | dev->tz = tz; | |
677 | dev->cdev = cdev; | |
678 | dev->trip = trip; | |
9d99842f ZR |
679 | dev->upper = upper; |
680 | dev->lower = lower; | |
ce119f83 | 681 | dev->target = THERMAL_NO_TARGET; |
6cd9e9f6 | 682 | dev->weight = weight; |
74051ba5 | 683 | |
203d3d4a ZR |
684 | result = get_idr(&tz->idr, &tz->lock, &dev->id); |
685 | if (result) | |
686 | goto free_mem; | |
687 | ||
688 | sprintf(dev->name, "cdev%d", dev->id); | |
689 | result = | |
690 | sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev->name); | |
691 | if (result) | |
692 | goto release_idr; | |
693 | ||
694 | sprintf(dev->attr_name, "cdev%d_trip_point", dev->id); | |
975f8c56 | 695 | sysfs_attr_init(&dev->attr.attr); |
203d3d4a ZR |
696 | dev->attr.attr.name = dev->attr_name; |
697 | dev->attr.attr.mode = 0444; | |
698 | dev->attr.show = thermal_cooling_device_trip_point_show; | |
699 | result = device_create_file(&tz->device, &dev->attr); | |
700 | if (result) | |
701 | goto remove_symbol_link; | |
702 | ||
db916513 JM |
703 | sprintf(dev->weight_attr_name, "cdev%d_weight", dev->id); |
704 | sysfs_attr_init(&dev->weight_attr.attr); | |
705 | dev->weight_attr.attr.name = dev->weight_attr_name; | |
706 | dev->weight_attr.attr.mode = S_IWUSR | S_IRUGO; | |
707 | dev->weight_attr.show = thermal_cooling_device_weight_show; | |
708 | dev->weight_attr.store = thermal_cooling_device_weight_store; | |
709 | result = device_create_file(&tz->device, &dev->weight_attr); | |
710 | if (result) | |
711 | goto remove_trip_file; | |
712 | ||
203d3d4a | 713 | mutex_lock(&tz->lock); |
f4a821ce | 714 | mutex_lock(&cdev->lock); |
cddf31b3 | 715 | list_for_each_entry(pos, &tz->thermal_instances, tz_node) |
203d3d4a ZR |
716 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
717 | result = -EEXIST; | |
718 | break; | |
719 | } | |
b5e4ae62 | 720 | if (!result) { |
cddf31b3 | 721 | list_add_tail(&dev->tz_node, &tz->thermal_instances); |
b5e4ae62 | 722 | list_add_tail(&dev->cdev_node, &cdev->thermal_instances); |
4511f716 | 723 | atomic_set(&tz->need_update, 1); |
b5e4ae62 | 724 | } |
f4a821ce | 725 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
726 | mutex_unlock(&tz->lock); |
727 | ||
728 | if (!result) | |
729 | return 0; | |
730 | ||
db916513 JM |
731 | device_remove_file(&tz->device, &dev->weight_attr); |
732 | remove_trip_file: | |
203d3d4a | 733 | device_remove_file(&tz->device, &dev->attr); |
caca8b80 | 734 | remove_symbol_link: |
203d3d4a | 735 | sysfs_remove_link(&tz->device.kobj, dev->name); |
caca8b80 | 736 | release_idr: |
203d3d4a | 737 | release_idr(&tz->idr, &tz->lock, dev->id); |
caca8b80 | 738 | free_mem: |
203d3d4a ZR |
739 | kfree(dev); |
740 | return result; | |
741 | } | |
910cb1e3 | 742 | EXPORT_SYMBOL_GPL(thermal_zone_bind_cooling_device); |
203d3d4a ZR |
743 | |
744 | /** | |
9892e5dc EV |
745 | * thermal_zone_unbind_cooling_device() - unbind a cooling device from a |
746 | * thermal zone. | |
747 | * @tz: pointer to a struct thermal_zone_device. | |
203d3d4a ZR |
748 | * @trip: indicates which trip point the cooling devices is |
749 | * associated with in this thermal zone. | |
9892e5dc | 750 | * @cdev: pointer to a struct thermal_cooling_device. |
543a9561 | 751 | * |
9892e5dc EV |
752 | * This interface function unbind a thermal cooling device from the certain |
753 | * trip point of a thermal zone device. | |
543a9561 | 754 | * This function is usually called in the thermal zone device .unbind callback. |
9892e5dc EV |
755 | * |
756 | * Return: 0 on success, the proper error value otherwise. | |
203d3d4a ZR |
757 | */ |
758 | int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz, | |
759 | int trip, | |
760 | struct thermal_cooling_device *cdev) | |
761 | { | |
b81b6ba3 | 762 | struct thermal_instance *pos, *next; |
203d3d4a ZR |
763 | |
764 | mutex_lock(&tz->lock); | |
f4a821ce | 765 | mutex_lock(&cdev->lock); |
cddf31b3 | 766 | list_for_each_entry_safe(pos, next, &tz->thermal_instances, tz_node) { |
543a9561 | 767 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
cddf31b3 | 768 | list_del(&pos->tz_node); |
b5e4ae62 | 769 | list_del(&pos->cdev_node); |
f4a821ce | 770 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
771 | mutex_unlock(&tz->lock); |
772 | goto unbind; | |
773 | } | |
774 | } | |
f4a821ce | 775 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
776 | mutex_unlock(&tz->lock); |
777 | ||
778 | return -ENODEV; | |
779 | ||
caca8b80 | 780 | unbind: |
528464ea | 781 | device_remove_file(&tz->device, &pos->weight_attr); |
203d3d4a ZR |
782 | device_remove_file(&tz->device, &pos->attr); |
783 | sysfs_remove_link(&tz->device.kobj, pos->name); | |
784 | release_idr(&tz->idr, &tz->lock, pos->id); | |
785 | kfree(pos); | |
786 | return 0; | |
787 | } | |
910cb1e3 | 788 | EXPORT_SYMBOL_GPL(thermal_zone_unbind_cooling_device); |
203d3d4a ZR |
789 | |
790 | static void thermal_release(struct device *dev) | |
791 | { | |
792 | struct thermal_zone_device *tz; | |
793 | struct thermal_cooling_device *cdev; | |
794 | ||
caca8b80 JP |
795 | if (!strncmp(dev_name(dev), "thermal_zone", |
796 | sizeof("thermal_zone") - 1)) { | |
203d3d4a ZR |
797 | tz = to_thermal_zone(dev); |
798 | kfree(tz); | |
732e4c8d | 799 | } else if(!strncmp(dev_name(dev), "cooling_device", |
800 | sizeof("cooling_device") - 1)){ | |
203d3d4a ZR |
801 | cdev = to_cooling_device(dev); |
802 | kfree(cdev); | |
803 | } | |
804 | } | |
805 | ||
806 | static struct class thermal_class = { | |
807 | .name = "thermal", | |
808 | .dev_release = thermal_release, | |
809 | }; | |
810 | ||
4b0d3c2d EV |
811 | static inline |
812 | void print_bind_err_msg(struct thermal_zone_device *tz, | |
813 | struct thermal_cooling_device *cdev, int ret) | |
f502ab84 EV |
814 | { |
815 | dev_err(&tz->device, "binding zone %s with cdev %s failed:%d\n", | |
816 | tz->type, cdev->type, ret); | |
817 | } | |
818 | ||
819 | static void __bind(struct thermal_zone_device *tz, int mask, | |
820 | struct thermal_cooling_device *cdev, | |
821 | unsigned long *limits, | |
822 | unsigned int weight) | |
823 | { | |
824 | int i, ret; | |
825 | ||
826 | for (i = 0; i < tz->trips; i++) { | |
827 | if (mask & (1 << i)) { | |
828 | unsigned long upper, lower; | |
829 | ||
830 | upper = THERMAL_NO_LIMIT; | |
831 | lower = THERMAL_NO_LIMIT; | |
832 | if (limits) { | |
833 | lower = limits[i * 2]; | |
834 | upper = limits[i * 2 + 1]; | |
835 | } | |
836 | ret = thermal_zone_bind_cooling_device(tz, i, cdev, | |
837 | upper, lower, | |
838 | weight); | |
839 | if (ret) | |
840 | print_bind_err_msg(tz, cdev, ret); | |
841 | } | |
842 | } | |
843 | } | |
844 | ||
949aad83 EV |
845 | static void bind_cdev(struct thermal_cooling_device *cdev) |
846 | { | |
847 | int i, ret; | |
848 | const struct thermal_zone_params *tzp; | |
849 | struct thermal_zone_device *pos = NULL; | |
850 | ||
851 | mutex_lock(&thermal_list_lock); | |
852 | ||
853 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
854 | if (!pos->tzp && !pos->ops->bind) | |
855 | continue; | |
856 | ||
857 | if (pos->ops->bind) { | |
858 | ret = pos->ops->bind(pos, cdev); | |
859 | if (ret) | |
860 | print_bind_err_msg(pos, cdev, ret); | |
861 | continue; | |
862 | } | |
863 | ||
864 | tzp = pos->tzp; | |
865 | if (!tzp || !tzp->tbp) | |
866 | continue; | |
867 | ||
868 | for (i = 0; i < tzp->num_tbps; i++) { | |
869 | if (tzp->tbp[i].cdev || !tzp->tbp[i].match) | |
870 | continue; | |
871 | if (tzp->tbp[i].match(pos, cdev)) | |
872 | continue; | |
873 | tzp->tbp[i].cdev = cdev; | |
874 | __bind(pos, tzp->tbp[i].trip_mask, cdev, | |
875 | tzp->tbp[i].binding_limits, | |
876 | tzp->tbp[i].weight); | |
877 | } | |
878 | } | |
879 | ||
880 | mutex_unlock(&thermal_list_lock); | |
881 | } | |
882 | ||
203d3d4a | 883 | /** |
a116b5d4 EV |
884 | * __thermal_cooling_device_register() - register a new thermal cooling device |
885 | * @np: a pointer to a device tree node. | |
203d3d4a ZR |
886 | * @type: the thermal cooling device type. |
887 | * @devdata: device private data. | |
888 | * @ops: standard thermal cooling devices callbacks. | |
3a6eccb3 EV |
889 | * |
890 | * This interface function adds a new thermal cooling device (fan/processor/...) | |
891 | * to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself | |
892 | * to all the thermal zone devices registered at the same time. | |
a116b5d4 EV |
893 | * It also gives the opportunity to link the cooling device to a device tree |
894 | * node, so that it can be bound to a thermal zone created out of device tree. | |
3a6eccb3 EV |
895 | * |
896 | * Return: a pointer to the created struct thermal_cooling_device or an | |
897 | * ERR_PTR. Caller must check return value with IS_ERR*() helpers. | |
203d3d4a | 898 | */ |
a116b5d4 EV |
899 | static struct thermal_cooling_device * |
900 | __thermal_cooling_device_register(struct device_node *np, | |
901 | char *type, void *devdata, | |
902 | const struct thermal_cooling_device_ops *ops) | |
203d3d4a ZR |
903 | { |
904 | struct thermal_cooling_device *cdev; | |
4511f716 | 905 | struct thermal_zone_device *pos = NULL; |
203d3d4a ZR |
906 | int result; |
907 | ||
204dd1d3 | 908 | if (type && strlen(type) >= THERMAL_NAME_LENGTH) |
3e6fda5c | 909 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
910 | |
911 | if (!ops || !ops->get_max_state || !ops->get_cur_state || | |
543a9561 | 912 | !ops->set_cur_state) |
3e6fda5c | 913 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
914 | |
915 | cdev = kzalloc(sizeof(struct thermal_cooling_device), GFP_KERNEL); | |
916 | if (!cdev) | |
3e6fda5c | 917 | return ERR_PTR(-ENOMEM); |
203d3d4a ZR |
918 | |
919 | result = get_idr(&thermal_cdev_idr, &thermal_idr_lock, &cdev->id); | |
920 | if (result) { | |
921 | kfree(cdev); | |
3e6fda5c | 922 | return ERR_PTR(result); |
203d3d4a ZR |
923 | } |
924 | ||
c7a8b9d9 | 925 | strlcpy(cdev->type, type ? : "", sizeof(cdev->type)); |
f4a821ce | 926 | mutex_init(&cdev->lock); |
b5e4ae62 | 927 | INIT_LIST_HEAD(&cdev->thermal_instances); |
a116b5d4 | 928 | cdev->np = np; |
203d3d4a | 929 | cdev->ops = ops; |
5ca0cce5 | 930 | cdev->updated = false; |
203d3d4a | 931 | cdev->device.class = &thermal_class; |
45cf2ec9 | 932 | thermal_cooling_device_setup_sysfs(cdev); |
203d3d4a | 933 | cdev->devdata = devdata; |
354655ea | 934 | dev_set_name(&cdev->device, "cooling_device%d", cdev->id); |
203d3d4a ZR |
935 | result = device_register(&cdev->device); |
936 | if (result) { | |
937 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
938 | kfree(cdev); | |
3e6fda5c | 939 | return ERR_PTR(result); |
203d3d4a ZR |
940 | } |
941 | ||
7e8ee1e9 | 942 | /* Add 'this' new cdev to the global cdev list */ |
203d3d4a ZR |
943 | mutex_lock(&thermal_list_lock); |
944 | list_add(&cdev->node, &thermal_cdev_list); | |
203d3d4a ZR |
945 | mutex_unlock(&thermal_list_lock); |
946 | ||
7e8ee1e9 D |
947 | /* Update binding information for 'this' new cdev */ |
948 | bind_cdev(cdev); | |
949 | ||
4511f716 CY |
950 | mutex_lock(&thermal_list_lock); |
951 | list_for_each_entry(pos, &thermal_tz_list, node) | |
952 | if (atomic_cmpxchg(&pos->need_update, 1, 0)) | |
0e70f466 SP |
953 | thermal_zone_device_update(pos, |
954 | THERMAL_EVENT_UNSPECIFIED); | |
4511f716 CY |
955 | mutex_unlock(&thermal_list_lock); |
956 | ||
7e8ee1e9 | 957 | return cdev; |
203d3d4a | 958 | } |
a116b5d4 EV |
959 | |
960 | /** | |
961 | * thermal_cooling_device_register() - register a new thermal cooling device | |
962 | * @type: the thermal cooling device type. | |
963 | * @devdata: device private data. | |
964 | * @ops: standard thermal cooling devices callbacks. | |
965 | * | |
966 | * This interface function adds a new thermal cooling device (fan/processor/...) | |
967 | * to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself | |
968 | * to all the thermal zone devices registered at the same time. | |
969 | * | |
970 | * Return: a pointer to the created struct thermal_cooling_device or an | |
971 | * ERR_PTR. Caller must check return value with IS_ERR*() helpers. | |
972 | */ | |
973 | struct thermal_cooling_device * | |
974 | thermal_cooling_device_register(char *type, void *devdata, | |
975 | const struct thermal_cooling_device_ops *ops) | |
976 | { | |
977 | return __thermal_cooling_device_register(NULL, type, devdata, ops); | |
978 | } | |
910cb1e3 | 979 | EXPORT_SYMBOL_GPL(thermal_cooling_device_register); |
203d3d4a | 980 | |
a116b5d4 EV |
981 | /** |
982 | * thermal_of_cooling_device_register() - register an OF thermal cooling device | |
983 | * @np: a pointer to a device tree node. | |
984 | * @type: the thermal cooling device type. | |
985 | * @devdata: device private data. | |
986 | * @ops: standard thermal cooling devices callbacks. | |
987 | * | |
988 | * This function will register a cooling device with device tree node reference. | |
989 | * This interface function adds a new thermal cooling device (fan/processor/...) | |
990 | * to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself | |
991 | * to all the thermal zone devices registered at the same time. | |
992 | * | |
993 | * Return: a pointer to the created struct thermal_cooling_device or an | |
994 | * ERR_PTR. Caller must check return value with IS_ERR*() helpers. | |
995 | */ | |
996 | struct thermal_cooling_device * | |
997 | thermal_of_cooling_device_register(struct device_node *np, | |
998 | char *type, void *devdata, | |
999 | const struct thermal_cooling_device_ops *ops) | |
1000 | { | |
1001 | return __thermal_cooling_device_register(np, type, devdata, ops); | |
1002 | } | |
1003 | EXPORT_SYMBOL_GPL(thermal_of_cooling_device_register); | |
1004 | ||
f11997fa EV |
1005 | static void __unbind(struct thermal_zone_device *tz, int mask, |
1006 | struct thermal_cooling_device *cdev) | |
1007 | { | |
1008 | int i; | |
1009 | ||
1010 | for (i = 0; i < tz->trips; i++) | |
1011 | if (mask & (1 << i)) | |
1012 | thermal_zone_unbind_cooling_device(tz, i, cdev); | |
1013 | } | |
1014 | ||
203d3d4a ZR |
1015 | /** |
1016 | * thermal_cooling_device_unregister - removes the registered thermal cooling device | |
203d3d4a ZR |
1017 | * @cdev: the thermal cooling device to remove. |
1018 | * | |
1019 | * thermal_cooling_device_unregister() must be called when the device is no | |
1020 | * longer needed. | |
1021 | */ | |
7e8ee1e9 | 1022 | void thermal_cooling_device_unregister(struct thermal_cooling_device *cdev) |
203d3d4a | 1023 | { |
7e8ee1e9 D |
1024 | int i; |
1025 | const struct thermal_zone_params *tzp; | |
203d3d4a ZR |
1026 | struct thermal_zone_device *tz; |
1027 | struct thermal_cooling_device *pos = NULL; | |
1028 | ||
1029 | if (!cdev) | |
1030 | return; | |
1031 | ||
1032 | mutex_lock(&thermal_list_lock); | |
1033 | list_for_each_entry(pos, &thermal_cdev_list, node) | |
1034 | if (pos == cdev) | |
1035 | break; | |
1036 | if (pos != cdev) { | |
1037 | /* thermal cooling device not found */ | |
1038 | mutex_unlock(&thermal_list_lock); | |
1039 | return; | |
1040 | } | |
1041 | list_del(&cdev->node); | |
7e8ee1e9 D |
1042 | |
1043 | /* Unbind all thermal zones associated with 'this' cdev */ | |
203d3d4a | 1044 | list_for_each_entry(tz, &thermal_tz_list, node) { |
7e8ee1e9 D |
1045 | if (tz->ops->unbind) { |
1046 | tz->ops->unbind(tz, cdev); | |
1047 | continue; | |
1048 | } | |
1049 | ||
1050 | if (!tz->tzp || !tz->tzp->tbp) | |
203d3d4a | 1051 | continue; |
7e8ee1e9 D |
1052 | |
1053 | tzp = tz->tzp; | |
1054 | for (i = 0; i < tzp->num_tbps; i++) { | |
1055 | if (tzp->tbp[i].cdev == cdev) { | |
1056 | __unbind(tz, tzp->tbp[i].trip_mask, cdev); | |
1057 | tzp->tbp[i].cdev = NULL; | |
1058 | } | |
1059 | } | |
203d3d4a | 1060 | } |
7e8ee1e9 | 1061 | |
203d3d4a | 1062 | mutex_unlock(&thermal_list_lock); |
7e8ee1e9 | 1063 | |
203d3d4a ZR |
1064 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); |
1065 | device_unregister(&cdev->device); | |
1066 | return; | |
1067 | } | |
910cb1e3 | 1068 | EXPORT_SYMBOL_GPL(thermal_cooling_device_unregister); |
203d3d4a | 1069 | |
90f5b5bb EV |
1070 | static void bind_tz(struct thermal_zone_device *tz) |
1071 | { | |
1072 | int i, ret; | |
1073 | struct thermal_cooling_device *pos = NULL; | |
1074 | const struct thermal_zone_params *tzp = tz->tzp; | |
1075 | ||
1076 | if (!tzp && !tz->ops->bind) | |
1077 | return; | |
1078 | ||
1079 | mutex_lock(&thermal_list_lock); | |
1080 | ||
1081 | /* If there is ops->bind, try to use ops->bind */ | |
1082 | if (tz->ops->bind) { | |
1083 | list_for_each_entry(pos, &thermal_cdev_list, node) { | |
1084 | ret = tz->ops->bind(tz, pos); | |
1085 | if (ret) | |
1086 | print_bind_err_msg(tz, pos, ret); | |
1087 | } | |
1088 | goto exit; | |
1089 | } | |
1090 | ||
1091 | if (!tzp || !tzp->tbp) | |
1092 | goto exit; | |
1093 | ||
1094 | list_for_each_entry(pos, &thermal_cdev_list, node) { | |
1095 | for (i = 0; i < tzp->num_tbps; i++) { | |
1096 | if (tzp->tbp[i].cdev || !tzp->tbp[i].match) | |
1097 | continue; | |
1098 | if (tzp->tbp[i].match(tz, pos)) | |
1099 | continue; | |
1100 | tzp->tbp[i].cdev = pos; | |
1101 | __bind(tz, tzp->tbp[i].trip_mask, pos, | |
1102 | tzp->tbp[i].binding_limits, | |
1103 | tzp->tbp[i].weight); | |
1104 | } | |
1105 | } | |
1106 | exit: | |
1107 | mutex_unlock(&thermal_list_lock); | |
1108 | } | |
1109 | ||
203d3d4a | 1110 | /** |
a00e55f9 | 1111 | * thermal_zone_device_register() - register a new thermal zone device |
203d3d4a ZR |
1112 | * @type: the thermal zone device type |
1113 | * @trips: the number of trip points the thermal zone support | |
c56f5c03 | 1114 | * @mask: a bit string indicating the writeablility of trip points |
203d3d4a ZR |
1115 | * @devdata: private device data |
1116 | * @ops: standard thermal zone device callbacks | |
50125a9b | 1117 | * @tzp: thermal zone platform parameters |
b1569e99 MG |
1118 | * @passive_delay: number of milliseconds to wait between polls when |
1119 | * performing passive cooling | |
1120 | * @polling_delay: number of milliseconds to wait between polls when checking | |
1121 | * whether trip points have been crossed (0 for interrupt | |
1122 | * driven systems) | |
203d3d4a | 1123 | * |
a00e55f9 EV |
1124 | * This interface function adds a new thermal zone device (sensor) to |
1125 | * /sys/class/thermal folder as thermal_zone[0-*]. It tries to bind all the | |
1126 | * thermal cooling devices registered at the same time. | |
203d3d4a | 1127 | * thermal_zone_device_unregister() must be called when the device is no |
1b7ddb84 | 1128 | * longer needed. The passive cooling depends on the .get_trend() return value. |
a00e55f9 EV |
1129 | * |
1130 | * Return: a pointer to the created struct thermal_zone_device or an | |
1131 | * in case of error, an ERR_PTR. Caller must check return value with | |
1132 | * IS_ERR*() helpers. | |
203d3d4a | 1133 | */ |
4b1bf587 | 1134 | struct thermal_zone_device *thermal_zone_device_register(const char *type, |
c56f5c03 | 1135 | int trips, int mask, void *devdata, |
4e5e4705 | 1136 | struct thermal_zone_device_ops *ops, |
6b775e87 | 1137 | struct thermal_zone_params *tzp, |
1b7ddb84 | 1138 | int passive_delay, int polling_delay) |
203d3d4a ZR |
1139 | { |
1140 | struct thermal_zone_device *tz; | |
03a971a2 | 1141 | enum thermal_trip_type trip_type; |
81ad4276 | 1142 | int trip_temp; |
203d3d4a ZR |
1143 | int result; |
1144 | int count; | |
e33df1d2 | 1145 | struct thermal_governor *governor; |
203d3d4a | 1146 | |
54fa38cc EV |
1147 | if (!type || strlen(type) == 0) |
1148 | return ERR_PTR(-EINVAL); | |
1149 | ||
204dd1d3 | 1150 | if (type && strlen(type) >= THERMAL_NAME_LENGTH) |
3e6fda5c | 1151 | return ERR_PTR(-EINVAL); |
203d3d4a | 1152 | |
c56f5c03 | 1153 | if (trips > THERMAL_MAX_TRIPS || trips < 0 || mask >> trips) |
3e6fda5c | 1154 | return ERR_PTR(-EINVAL); |
203d3d4a | 1155 | |
81bd4e1c | 1156 | if (!ops) |
3e6fda5c | 1157 | return ERR_PTR(-EINVAL); |
203d3d4a | 1158 | |
83720d0b | 1159 | if (trips > 0 && (!ops->get_trip_type || !ops->get_trip_temp)) |
6b2aa51d EV |
1160 | return ERR_PTR(-EINVAL); |
1161 | ||
203d3d4a ZR |
1162 | tz = kzalloc(sizeof(struct thermal_zone_device), GFP_KERNEL); |
1163 | if (!tz) | |
3e6fda5c | 1164 | return ERR_PTR(-ENOMEM); |
203d3d4a | 1165 | |
2d374139 | 1166 | INIT_LIST_HEAD(&tz->thermal_instances); |
203d3d4a ZR |
1167 | idr_init(&tz->idr); |
1168 | mutex_init(&tz->lock); | |
1169 | result = get_idr(&thermal_tz_idr, &thermal_idr_lock, &tz->id); | |
1170 | if (result) { | |
1171 | kfree(tz); | |
3e6fda5c | 1172 | return ERR_PTR(result); |
203d3d4a ZR |
1173 | } |
1174 | ||
54fa38cc | 1175 | strlcpy(tz->type, type, sizeof(tz->type)); |
203d3d4a | 1176 | tz->ops = ops; |
50125a9b | 1177 | tz->tzp = tzp; |
203d3d4a ZR |
1178 | tz->device.class = &thermal_class; |
1179 | tz->devdata = devdata; | |
1180 | tz->trips = trips; | |
b1569e99 MG |
1181 | tz->passive_delay = passive_delay; |
1182 | tz->polling_delay = polling_delay; | |
1c600861 | 1183 | |
4d0fe749 | 1184 | /* sys I/F */ |
1c600861 | 1185 | /* Add nodes that are always present via .groups */ |
4d0fe749 EV |
1186 | result = thermal_zone_create_device_groups(tz, mask); |
1187 | if (result) | |
1188 | goto unregister; | |
1189 | ||
4511f716 CY |
1190 | /* A new thermal zone needs to be updated anyway. */ |
1191 | atomic_set(&tz->need_update, 1); | |
b1569e99 | 1192 | |
354655ea | 1193 | dev_set_name(&tz->device, "thermal_zone%d", tz->id); |
203d3d4a ZR |
1194 | result = device_register(&tz->device); |
1195 | if (result) { | |
1196 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); | |
1197 | kfree(tz); | |
3e6fda5c | 1198 | return ERR_PTR(result); |
203d3d4a ZR |
1199 | } |
1200 | ||
203d3d4a | 1201 | for (count = 0; count < trips; count++) { |
81ad4276 ZR |
1202 | if (tz->ops->get_trip_type(tz, count, &trip_type)) |
1203 | set_bit(count, &tz->trips_disabled); | |
81ad4276 ZR |
1204 | if (tz->ops->get_trip_temp(tz, count, &trip_temp)) |
1205 | set_bit(count, &tz->trips_disabled); | |
1206 | /* Check for bogus trip points */ | |
1207 | if (trip_temp == 0) | |
1208 | set_bit(count, &tz->trips_disabled); | |
203d3d4a ZR |
1209 | } |
1210 | ||
a4a15485 D |
1211 | /* Update 'this' zone's governor information */ |
1212 | mutex_lock(&thermal_governor_lock); | |
1213 | ||
1214 | if (tz->tzp) | |
e33df1d2 | 1215 | governor = __find_governor(tz->tzp->governor_name); |
a4a15485 | 1216 | else |
e33df1d2 JM |
1217 | governor = def_governor; |
1218 | ||
1219 | result = thermal_set_governor(tz, governor); | |
1220 | if (result) { | |
1221 | mutex_unlock(&thermal_governor_lock); | |
1222 | goto unregister; | |
1223 | } | |
a4a15485 D |
1224 | |
1225 | mutex_unlock(&thermal_governor_lock); | |
1226 | ||
ccba4ffd EV |
1227 | if (!tz->tzp || !tz->tzp->no_hwmon) { |
1228 | result = thermal_add_hwmon_sysfs(tz); | |
1229 | if (result) | |
1230 | goto unregister; | |
1231 | } | |
e68b16ab | 1232 | |
203d3d4a ZR |
1233 | mutex_lock(&thermal_list_lock); |
1234 | list_add_tail(&tz->node, &thermal_tz_list); | |
203d3d4a ZR |
1235 | mutex_unlock(&thermal_list_lock); |
1236 | ||
7e8ee1e9 D |
1237 | /* Bind cooling devices for this zone */ |
1238 | bind_tz(tz); | |
1239 | ||
b1569e99 MG |
1240 | INIT_DELAYED_WORK(&(tz->poll_queue), thermal_zone_device_check); |
1241 | ||
bb431ba2 | 1242 | thermal_zone_device_reset(tz); |
4511f716 CY |
1243 | /* Update the new thermal zone and mark it as already updated. */ |
1244 | if (atomic_cmpxchg(&tz->need_update, 1, 0)) | |
0e70f466 | 1245 | thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED); |
b1569e99 | 1246 | |
14015860 | 1247 | return tz; |
203d3d4a | 1248 | |
caca8b80 | 1249 | unregister: |
203d3d4a ZR |
1250 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1251 | device_unregister(&tz->device); | |
3e6fda5c | 1252 | return ERR_PTR(result); |
203d3d4a | 1253 | } |
910cb1e3 | 1254 | EXPORT_SYMBOL_GPL(thermal_zone_device_register); |
203d3d4a ZR |
1255 | |
1256 | /** | |
1257 | * thermal_device_unregister - removes the registered thermal zone device | |
203d3d4a ZR |
1258 | * @tz: the thermal zone device to remove |
1259 | */ | |
1260 | void thermal_zone_device_unregister(struct thermal_zone_device *tz) | |
1261 | { | |
7e8ee1e9 D |
1262 | int i; |
1263 | const struct thermal_zone_params *tzp; | |
203d3d4a ZR |
1264 | struct thermal_cooling_device *cdev; |
1265 | struct thermal_zone_device *pos = NULL; | |
203d3d4a ZR |
1266 | |
1267 | if (!tz) | |
1268 | return; | |
1269 | ||
7e8ee1e9 D |
1270 | tzp = tz->tzp; |
1271 | ||
203d3d4a ZR |
1272 | mutex_lock(&thermal_list_lock); |
1273 | list_for_each_entry(pos, &thermal_tz_list, node) | |
1274 | if (pos == tz) | |
1275 | break; | |
1276 | if (pos != tz) { | |
1277 | /* thermal zone device not found */ | |
1278 | mutex_unlock(&thermal_list_lock); | |
1279 | return; | |
1280 | } | |
1281 | list_del(&tz->node); | |
7e8ee1e9 D |
1282 | |
1283 | /* Unbind all cdevs associated with 'this' thermal zone */ | |
1284 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
1285 | if (tz->ops->unbind) { | |
1286 | tz->ops->unbind(tz, cdev); | |
1287 | continue; | |
1288 | } | |
1289 | ||
1290 | if (!tzp || !tzp->tbp) | |
1291 | break; | |
1292 | ||
1293 | for (i = 0; i < tzp->num_tbps; i++) { | |
1294 | if (tzp->tbp[i].cdev == cdev) { | |
1295 | __unbind(tz, tzp->tbp[i].trip_mask, cdev); | |
1296 | tzp->tbp[i].cdev = NULL; | |
1297 | } | |
1298 | } | |
1299 | } | |
1300 | ||
203d3d4a ZR |
1301 | mutex_unlock(&thermal_list_lock); |
1302 | ||
b1569e99 MG |
1303 | thermal_zone_device_set_polling(tz, 0); |
1304 | ||
4d0fe749 EV |
1305 | kfree(tz->trip_type_attrs); |
1306 | kfree(tz->trip_temp_attrs); | |
1307 | kfree(tz->trip_hyst_attrs); | |
1308 | kfree(tz->trips_attribute_group.attrs); | |
e33df1d2 | 1309 | thermal_set_governor(tz, NULL); |
203d3d4a | 1310 | |
e68b16ab | 1311 | thermal_remove_hwmon_sysfs(tz); |
203d3d4a ZR |
1312 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1313 | idr_destroy(&tz->idr); | |
1314 | mutex_destroy(&tz->lock); | |
1315 | device_unregister(&tz->device); | |
e161aefb | 1316 | kfree(tz->device.groups); |
203d3d4a | 1317 | } |
910cb1e3 | 1318 | EXPORT_SYMBOL_GPL(thermal_zone_device_unregister); |
203d3d4a | 1319 | |
63c4d919 EV |
1320 | /** |
1321 | * thermal_zone_get_zone_by_name() - search for a zone and returns its ref | |
1322 | * @name: thermal zone name to fetch the temperature | |
1323 | * | |
1324 | * When only one zone is found with the passed name, returns a reference to it. | |
1325 | * | |
1326 | * Return: On success returns a reference to an unique thermal zone with | |
1327 | * matching name equals to @name, an ERR_PTR otherwise (-EINVAL for invalid | |
1328 | * paramenters, -ENODEV for not found and -EEXIST for multiple matches). | |
1329 | */ | |
1330 | struct thermal_zone_device *thermal_zone_get_zone_by_name(const char *name) | |
1331 | { | |
1332 | struct thermal_zone_device *pos = NULL, *ref = ERR_PTR(-EINVAL); | |
1333 | unsigned int found = 0; | |
1334 | ||
1335 | if (!name) | |
1336 | goto exit; | |
1337 | ||
1338 | mutex_lock(&thermal_list_lock); | |
1339 | list_for_each_entry(pos, &thermal_tz_list, node) | |
484ac2f3 | 1340 | if (!strncasecmp(name, pos->type, THERMAL_NAME_LENGTH)) { |
63c4d919 EV |
1341 | found++; |
1342 | ref = pos; | |
1343 | } | |
1344 | mutex_unlock(&thermal_list_lock); | |
1345 | ||
1346 | /* nothing has been found, thus an error code for it */ | |
1347 | if (found == 0) | |
1348 | ref = ERR_PTR(-ENODEV); | |
1349 | else if (found > 1) | |
1350 | /* Success only when an unique zone is found */ | |
1351 | ref = ERR_PTR(-EEXIST); | |
1352 | ||
1353 | exit: | |
1354 | return ref; | |
1355 | } | |
1356 | EXPORT_SYMBOL_GPL(thermal_zone_get_zone_by_name); | |
1357 | ||
4a7069a3 RN |
1358 | /** |
1359 | * thermal_zone_get_slope - return the slope attribute of the thermal zone | |
1360 | * @tz: thermal zone device with the slope attribute | |
1361 | * | |
1362 | * Return: If the thermal zone device has a slope attribute, return it, else | |
1363 | * return 1. | |
1364 | */ | |
1365 | int thermal_zone_get_slope(struct thermal_zone_device *tz) | |
1366 | { | |
1367 | if (tz && tz->tzp) | |
1368 | return tz->tzp->slope; | |
1369 | return 1; | |
1370 | } | |
1371 | EXPORT_SYMBOL_GPL(thermal_zone_get_slope); | |
1372 | ||
1373 | /** | |
1374 | * thermal_zone_get_offset - return the offset attribute of the thermal zone | |
1375 | * @tz: thermal zone device with the offset attribute | |
1376 | * | |
1377 | * Return: If the thermal zone device has a offset attribute, return it, else | |
1378 | * return 0. | |
1379 | */ | |
1380 | int thermal_zone_get_offset(struct thermal_zone_device *tz) | |
1381 | { | |
1382 | if (tz && tz->tzp) | |
1383 | return tz->tzp->offset; | |
1384 | return 0; | |
1385 | } | |
1386 | EXPORT_SYMBOL_GPL(thermal_zone_get_offset); | |
1387 | ||
af06216a | 1388 | #ifdef CONFIG_NET |
2a94fe48 JB |
1389 | static const struct genl_multicast_group thermal_event_mcgrps[] = { |
1390 | { .name = THERMAL_GENL_MCAST_GROUP_NAME, }, | |
1391 | }; | |
1392 | ||
af06216a RW |
1393 | static struct genl_family thermal_event_genl_family = { |
1394 | .id = GENL_ID_GENERATE, | |
1395 | .name = THERMAL_GENL_FAMILY_NAME, | |
1396 | .version = THERMAL_GENL_VERSION, | |
1397 | .maxattr = THERMAL_GENL_ATTR_MAX, | |
2a94fe48 JB |
1398 | .mcgrps = thermal_event_mcgrps, |
1399 | .n_mcgrps = ARRAY_SIZE(thermal_event_mcgrps), | |
af06216a RW |
1400 | }; |
1401 | ||
8ab3e6a0 EV |
1402 | int thermal_generate_netlink_event(struct thermal_zone_device *tz, |
1403 | enum events event) | |
4cb18728 D |
1404 | { |
1405 | struct sk_buff *skb; | |
1406 | struct nlattr *attr; | |
1407 | struct thermal_genl_event *thermal_event; | |
1408 | void *msg_header; | |
1409 | int size; | |
1410 | int result; | |
b11de07c | 1411 | static unsigned int thermal_event_seqnum; |
4cb18728 | 1412 | |
8ab3e6a0 EV |
1413 | if (!tz) |
1414 | return -EINVAL; | |
1415 | ||
4cb18728 | 1416 | /* allocate memory */ |
886ee546 JP |
1417 | size = nla_total_size(sizeof(struct thermal_genl_event)) + |
1418 | nla_total_size(0); | |
4cb18728 D |
1419 | |
1420 | skb = genlmsg_new(size, GFP_ATOMIC); | |
1421 | if (!skb) | |
1422 | return -ENOMEM; | |
1423 | ||
1424 | /* add the genetlink message header */ | |
1425 | msg_header = genlmsg_put(skb, 0, thermal_event_seqnum++, | |
1426 | &thermal_event_genl_family, 0, | |
1427 | THERMAL_GENL_CMD_EVENT); | |
1428 | if (!msg_header) { | |
1429 | nlmsg_free(skb); | |
1430 | return -ENOMEM; | |
1431 | } | |
1432 | ||
1433 | /* fill the data */ | |
886ee546 JP |
1434 | attr = nla_reserve(skb, THERMAL_GENL_ATTR_EVENT, |
1435 | sizeof(struct thermal_genl_event)); | |
4cb18728 D |
1436 | |
1437 | if (!attr) { | |
1438 | nlmsg_free(skb); | |
1439 | return -EINVAL; | |
1440 | } | |
1441 | ||
1442 | thermal_event = nla_data(attr); | |
1443 | if (!thermal_event) { | |
1444 | nlmsg_free(skb); | |
1445 | return -EINVAL; | |
1446 | } | |
1447 | ||
1448 | memset(thermal_event, 0, sizeof(struct thermal_genl_event)); | |
1449 | ||
8ab3e6a0 | 1450 | thermal_event->orig = tz->id; |
4cb18728 D |
1451 | thermal_event->event = event; |
1452 | ||
1453 | /* send multicast genetlink message */ | |
053c095a | 1454 | genlmsg_end(skb, msg_header); |
4cb18728 | 1455 | |
68eb5503 | 1456 | result = genlmsg_multicast(&thermal_event_genl_family, skb, 0, |
2a94fe48 | 1457 | 0, GFP_ATOMIC); |
4cb18728 | 1458 | if (result) |
923e0b1e | 1459 | dev_err(&tz->device, "Failed to send netlink event:%d", result); |
4cb18728 D |
1460 | |
1461 | return result; | |
1462 | } | |
910cb1e3 | 1463 | EXPORT_SYMBOL_GPL(thermal_generate_netlink_event); |
4cb18728 D |
1464 | |
1465 | static int genetlink_init(void) | |
1466 | { | |
2a94fe48 | 1467 | return genl_register_family(&thermal_event_genl_family); |
4cb18728 D |
1468 | } |
1469 | ||
af06216a RW |
1470 | static void genetlink_exit(void) |
1471 | { | |
1472 | genl_unregister_family(&thermal_event_genl_family); | |
1473 | } | |
1474 | #else /* !CONFIG_NET */ | |
1475 | static inline int genetlink_init(void) { return 0; } | |
1476 | static inline void genetlink_exit(void) {} | |
1477 | #endif /* !CONFIG_NET */ | |
1478 | ||
ff140fea ZR |
1479 | static int thermal_pm_notify(struct notifier_block *nb, |
1480 | unsigned long mode, void *_unused) | |
1481 | { | |
1482 | struct thermal_zone_device *tz; | |
1483 | ||
1484 | switch (mode) { | |
1485 | case PM_HIBERNATION_PREPARE: | |
1486 | case PM_RESTORE_PREPARE: | |
1487 | case PM_SUSPEND_PREPARE: | |
1488 | atomic_set(&in_suspend, 1); | |
1489 | break; | |
1490 | case PM_POST_HIBERNATION: | |
1491 | case PM_POST_RESTORE: | |
1492 | case PM_POST_SUSPEND: | |
1493 | atomic_set(&in_suspend, 0); | |
1494 | list_for_each_entry(tz, &thermal_tz_list, node) { | |
1495 | thermal_zone_device_reset(tz); | |
0e70f466 SP |
1496 | thermal_zone_device_update(tz, |
1497 | THERMAL_EVENT_UNSPECIFIED); | |
ff140fea ZR |
1498 | } |
1499 | break; | |
1500 | default: | |
1501 | break; | |
1502 | } | |
1503 | return 0; | |
1504 | } | |
1505 | ||
1506 | static struct notifier_block thermal_pm_nb = { | |
1507 | .notifier_call = thermal_pm_notify, | |
1508 | }; | |
1509 | ||
203d3d4a ZR |
1510 | static int __init thermal_init(void) |
1511 | { | |
80a26a5c ZR |
1512 | int result; |
1513 | ||
1514 | result = thermal_register_governors(); | |
1515 | if (result) | |
1516 | goto error; | |
203d3d4a ZR |
1517 | |
1518 | result = class_register(&thermal_class); | |
80a26a5c ZR |
1519 | if (result) |
1520 | goto unregister_governors; | |
1521 | ||
4cb18728 | 1522 | result = genetlink_init(); |
80a26a5c ZR |
1523 | if (result) |
1524 | goto unregister_class; | |
1525 | ||
4e5e4705 EV |
1526 | result = of_parse_thermal_zones(); |
1527 | if (result) | |
1528 | goto exit_netlink; | |
1529 | ||
ff140fea ZR |
1530 | result = register_pm_notifier(&thermal_pm_nb); |
1531 | if (result) | |
1532 | pr_warn("Thermal: Can not register suspend notifier, return %d\n", | |
1533 | result); | |
1534 | ||
80a26a5c ZR |
1535 | return 0; |
1536 | ||
4e5e4705 EV |
1537 | exit_netlink: |
1538 | genetlink_exit(); | |
80a26a5c ZR |
1539 | unregister_class: |
1540 | class_unregister(&thermal_class); | |
9d367e5e LH |
1541 | unregister_governors: |
1542 | thermal_unregister_governors(); | |
80a26a5c ZR |
1543 | error: |
1544 | idr_destroy(&thermal_tz_idr); | |
1545 | idr_destroy(&thermal_cdev_idr); | |
1546 | mutex_destroy(&thermal_idr_lock); | |
1547 | mutex_destroy(&thermal_list_lock); | |
1548 | mutex_destroy(&thermal_governor_lock); | |
203d3d4a ZR |
1549 | return result; |
1550 | } | |
1551 | ||
1552 | static void __exit thermal_exit(void) | |
1553 | { | |
ff140fea | 1554 | unregister_pm_notifier(&thermal_pm_nb); |
4e5e4705 | 1555 | of_thermal_destroy_zones(); |
80a26a5c | 1556 | genetlink_exit(); |
203d3d4a | 1557 | class_unregister(&thermal_class); |
80a26a5c | 1558 | thermal_unregister_governors(); |
203d3d4a ZR |
1559 | idr_destroy(&thermal_tz_idr); |
1560 | idr_destroy(&thermal_cdev_idr); | |
1561 | mutex_destroy(&thermal_idr_lock); | |
1562 | mutex_destroy(&thermal_list_lock); | |
80a26a5c | 1563 | mutex_destroy(&thermal_governor_lock); |
203d3d4a ZR |
1564 | } |
1565 | ||
4cb18728 | 1566 | fs_initcall(thermal_init); |
203d3d4a | 1567 | module_exit(thermal_exit); |