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 | * | |
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 | ||
c5a01dd5 JP |
26 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
27 | ||
203d3d4a ZR |
28 | #include <linux/module.h> |
29 | #include <linux/device.h> | |
30 | #include <linux/err.h> | |
5a0e3ad6 | 31 | #include <linux/slab.h> |
203d3d4a ZR |
32 | #include <linux/kdev_t.h> |
33 | #include <linux/idr.h> | |
34 | #include <linux/thermal.h> | |
b1569e99 | 35 | #include <linux/reboot.h> |
42a5bf50 | 36 | #include <linux/string.h> |
a116b5d4 | 37 | #include <linux/of.h> |
4cb18728 D |
38 | #include <net/netlink.h> |
39 | #include <net/genetlink.h> | |
ff140fea | 40 | #include <linux/suspend.h> |
203d3d4a | 41 | |
100a8fdb PA |
42 | #define CREATE_TRACE_POINTS |
43 | #include <trace/events/thermal.h> | |
44 | ||
71350db4 | 45 | #include "thermal_core.h" |
0dd88793 | 46 | #include "thermal_hwmon.h" |
71350db4 | 47 | |
63c4ec90 | 48 | MODULE_AUTHOR("Zhang Rui"); |
203d3d4a | 49 | MODULE_DESCRIPTION("Generic thermal management sysfs support"); |
6d8d4974 | 50 | MODULE_LICENSE("GPL v2"); |
203d3d4a | 51 | |
203d3d4a ZR |
52 | static DEFINE_IDR(thermal_tz_idr); |
53 | static DEFINE_IDR(thermal_cdev_idr); | |
54 | static DEFINE_MUTEX(thermal_idr_lock); | |
55 | ||
56 | static LIST_HEAD(thermal_tz_list); | |
57 | static LIST_HEAD(thermal_cdev_list); | |
a4a15485 D |
58 | static LIST_HEAD(thermal_governor_list); |
59 | ||
203d3d4a | 60 | static DEFINE_MUTEX(thermal_list_lock); |
a4a15485 D |
61 | static DEFINE_MUTEX(thermal_governor_lock); |
62 | ||
ff140fea ZR |
63 | static atomic_t in_suspend; |
64 | ||
f2234bcd ZR |
65 | static struct thermal_governor *def_governor; |
66 | ||
1b4f4849 EV |
67 | /* |
68 | * Governor section: set of functions to handle thermal governors | |
69 | * | |
70 | * Functions to help in the life cycle of thermal governors within | |
71 | * the thermal core and by the thermal governor code. | |
72 | */ | |
73 | ||
a4a15485 D |
74 | static struct thermal_governor *__find_governor(const char *name) |
75 | { | |
76 | struct thermal_governor *pos; | |
77 | ||
f2234bcd ZR |
78 | if (!name || !name[0]) |
79 | return def_governor; | |
80 | ||
a4a15485 | 81 | list_for_each_entry(pos, &thermal_governor_list, governor_list) |
484ac2f3 | 82 | if (!strncasecmp(name, pos->name, THERMAL_NAME_LENGTH)) |
a4a15485 D |
83 | return pos; |
84 | ||
85 | return NULL; | |
86 | } | |
87 | ||
e33df1d2 JM |
88 | /** |
89 | * bind_previous_governor() - bind the previous governor of the thermal zone | |
90 | * @tz: a valid pointer to a struct thermal_zone_device | |
91 | * @failed_gov_name: the name of the governor that failed to register | |
92 | * | |
93 | * Register the previous governor of the thermal zone after a new | |
94 | * governor has failed to be bound. | |
95 | */ | |
96 | static void bind_previous_governor(struct thermal_zone_device *tz, | |
97 | const char *failed_gov_name) | |
98 | { | |
99 | if (tz->governor && tz->governor->bind_to_tz) { | |
100 | if (tz->governor->bind_to_tz(tz)) { | |
101 | dev_err(&tz->device, | |
102 | "governor %s failed to bind and the previous one (%s) failed to bind again, thermal zone %s has no governor\n", | |
103 | failed_gov_name, tz->governor->name, tz->type); | |
104 | tz->governor = NULL; | |
105 | } | |
106 | } | |
107 | } | |
108 | ||
109 | /** | |
110 | * thermal_set_governor() - Switch to another governor | |
111 | * @tz: a valid pointer to a struct thermal_zone_device | |
112 | * @new_gov: pointer to the new governor | |
113 | * | |
114 | * Change the governor of thermal zone @tz. | |
115 | * | |
116 | * Return: 0 on success, an error if the new governor's bind_to_tz() failed. | |
117 | */ | |
118 | static int thermal_set_governor(struct thermal_zone_device *tz, | |
119 | struct thermal_governor *new_gov) | |
120 | { | |
121 | int ret = 0; | |
122 | ||
123 | if (tz->governor && tz->governor->unbind_from_tz) | |
124 | tz->governor->unbind_from_tz(tz); | |
125 | ||
126 | if (new_gov && new_gov->bind_to_tz) { | |
127 | ret = new_gov->bind_to_tz(tz); | |
128 | if (ret) { | |
129 | bind_previous_governor(tz, new_gov->name); | |
130 | ||
131 | return ret; | |
132 | } | |
133 | } | |
134 | ||
135 | tz->governor = new_gov; | |
136 | ||
137 | return ret; | |
138 | } | |
139 | ||
a4a15485 D |
140 | int thermal_register_governor(struct thermal_governor *governor) |
141 | { | |
142 | int err; | |
143 | const char *name; | |
144 | struct thermal_zone_device *pos; | |
145 | ||
146 | if (!governor) | |
147 | return -EINVAL; | |
148 | ||
149 | mutex_lock(&thermal_governor_lock); | |
150 | ||
151 | err = -EBUSY; | |
152 | if (__find_governor(governor->name) == NULL) { | |
153 | err = 0; | |
154 | list_add(&governor->governor_list, &thermal_governor_list); | |
f2234bcd ZR |
155 | if (!def_governor && !strncmp(governor->name, |
156 | DEFAULT_THERMAL_GOVERNOR, THERMAL_NAME_LENGTH)) | |
157 | def_governor = governor; | |
a4a15485 D |
158 | } |
159 | ||
160 | mutex_lock(&thermal_list_lock); | |
161 | ||
162 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
f2234bcd ZR |
163 | /* |
164 | * only thermal zones with specified tz->tzp->governor_name | |
165 | * may run with tz->govenor unset | |
166 | */ | |
a4a15485 D |
167 | if (pos->governor) |
168 | continue; | |
f2234bcd ZR |
169 | |
170 | name = pos->tzp->governor_name; | |
171 | ||
e33df1d2 JM |
172 | if (!strncasecmp(name, governor->name, THERMAL_NAME_LENGTH)) { |
173 | int ret; | |
174 | ||
175 | ret = thermal_set_governor(pos, governor); | |
176 | if (ret) | |
177 | dev_err(&pos->device, | |
178 | "Failed to set governor %s for thermal zone %s: %d\n", | |
179 | governor->name, pos->type, ret); | |
180 | } | |
a4a15485 D |
181 | } |
182 | ||
183 | mutex_unlock(&thermal_list_lock); | |
184 | mutex_unlock(&thermal_governor_lock); | |
185 | ||
186 | return err; | |
187 | } | |
a4a15485 D |
188 | |
189 | void thermal_unregister_governor(struct thermal_governor *governor) | |
190 | { | |
191 | struct thermal_zone_device *pos; | |
192 | ||
193 | if (!governor) | |
194 | return; | |
195 | ||
196 | mutex_lock(&thermal_governor_lock); | |
197 | ||
198 | if (__find_governor(governor->name) == NULL) | |
199 | goto exit; | |
200 | ||
201 | mutex_lock(&thermal_list_lock); | |
202 | ||
203 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
484ac2f3 | 204 | if (!strncasecmp(pos->governor->name, governor->name, |
a4a15485 | 205 | THERMAL_NAME_LENGTH)) |
e33df1d2 | 206 | thermal_set_governor(pos, NULL); |
a4a15485 D |
207 | } |
208 | ||
209 | mutex_unlock(&thermal_list_lock); | |
210 | list_del(&governor->governor_list); | |
211 | exit: | |
212 | mutex_unlock(&thermal_governor_lock); | |
213 | return; | |
214 | } | |
203d3d4a | 215 | |
1b4f4849 EV |
216 | int thermal_zone_device_set_policy(struct thermal_zone_device *tz, |
217 | char *policy) | |
218 | { | |
219 | struct thermal_governor *gov; | |
220 | int ret = -EINVAL; | |
221 | ||
222 | mutex_lock(&thermal_governor_lock); | |
223 | mutex_lock(&tz->lock); | |
224 | ||
225 | gov = __find_governor(strim(policy)); | |
226 | if (!gov) | |
227 | goto exit; | |
228 | ||
229 | ret = thermal_set_governor(tz, gov); | |
230 | ||
231 | exit: | |
232 | mutex_unlock(&tz->lock); | |
233 | mutex_unlock(&thermal_governor_lock); | |
234 | ||
235 | return ret; | |
236 | } | |
237 | ||
238 | int thermal_build_list_of_policies(char *buf) | |
239 | { | |
240 | struct thermal_governor *pos; | |
241 | ssize_t count = 0; | |
242 | ssize_t size = PAGE_SIZE; | |
243 | ||
244 | mutex_lock(&thermal_governor_lock); | |
245 | ||
246 | list_for_each_entry(pos, &thermal_governor_list, governor_list) { | |
247 | size = PAGE_SIZE - count; | |
248 | count += scnprintf(buf + count, size, "%s ", pos->name); | |
249 | } | |
250 | count += scnprintf(buf + count, size, "\n"); | |
251 | ||
252 | mutex_unlock(&thermal_governor_lock); | |
253 | ||
254 | return count; | |
255 | } | |
256 | ||
257 | static int __init thermal_register_governors(void) | |
258 | { | |
259 | int result; | |
260 | ||
261 | result = thermal_gov_step_wise_register(); | |
262 | if (result) | |
263 | return result; | |
264 | ||
265 | result = thermal_gov_fair_share_register(); | |
266 | if (result) | |
267 | return result; | |
268 | ||
269 | result = thermal_gov_bang_bang_register(); | |
270 | if (result) | |
271 | return result; | |
272 | ||
273 | result = thermal_gov_user_space_register(); | |
274 | if (result) | |
275 | return result; | |
276 | ||
277 | return thermal_gov_power_allocator_register(); | |
278 | } | |
279 | ||
280 | static void thermal_unregister_governors(void) | |
281 | { | |
282 | thermal_gov_step_wise_unregister(); | |
283 | thermal_gov_fair_share_unregister(); | |
284 | thermal_gov_bang_bang_unregister(); | |
285 | thermal_gov_user_space_unregister(); | |
286 | thermal_gov_power_allocator_unregister(); | |
287 | } | |
288 | ||
7e8ee1e9 D |
289 | static void print_bind_err_msg(struct thermal_zone_device *tz, |
290 | struct thermal_cooling_device *cdev, int ret) | |
291 | { | |
292 | dev_err(&tz->device, "binding zone %s with cdev %s failed:%d\n", | |
293 | tz->type, cdev->type, ret); | |
294 | } | |
295 | ||
296 | static void __bind(struct thermal_zone_device *tz, int mask, | |
a8892d83 | 297 | struct thermal_cooling_device *cdev, |
6cd9e9f6 KS |
298 | unsigned long *limits, |
299 | unsigned int weight) | |
7e8ee1e9 D |
300 | { |
301 | int i, ret; | |
302 | ||
303 | for (i = 0; i < tz->trips; i++) { | |
304 | if (mask & (1 << i)) { | |
a8892d83 EV |
305 | unsigned long upper, lower; |
306 | ||
307 | upper = THERMAL_NO_LIMIT; | |
308 | lower = THERMAL_NO_LIMIT; | |
309 | if (limits) { | |
310 | lower = limits[i * 2]; | |
311 | upper = limits[i * 2 + 1]; | |
312 | } | |
7e8ee1e9 | 313 | ret = thermal_zone_bind_cooling_device(tz, i, cdev, |
6cd9e9f6 KS |
314 | upper, lower, |
315 | weight); | |
7e8ee1e9 D |
316 | if (ret) |
317 | print_bind_err_msg(tz, cdev, ret); | |
318 | } | |
319 | } | |
320 | } | |
321 | ||
322 | static void __unbind(struct thermal_zone_device *tz, int mask, | |
4f5163fa | 323 | struct thermal_cooling_device *cdev) |
7e8ee1e9 D |
324 | { |
325 | int i; | |
326 | ||
327 | for (i = 0; i < tz->trips; i++) | |
328 | if (mask & (1 << i)) | |
329 | thermal_zone_unbind_cooling_device(tz, i, cdev); | |
330 | } | |
331 | ||
332 | static void bind_cdev(struct thermal_cooling_device *cdev) | |
333 | { | |
334 | int i, ret; | |
335 | const struct thermal_zone_params *tzp; | |
336 | struct thermal_zone_device *pos = NULL; | |
337 | ||
338 | mutex_lock(&thermal_list_lock); | |
339 | ||
340 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
341 | if (!pos->tzp && !pos->ops->bind) | |
342 | continue; | |
343 | ||
a9f2d19b | 344 | if (pos->ops->bind) { |
7e8ee1e9 D |
345 | ret = pos->ops->bind(pos, cdev); |
346 | if (ret) | |
347 | print_bind_err_msg(pos, cdev, ret); | |
a9f2d19b | 348 | continue; |
7e8ee1e9 D |
349 | } |
350 | ||
351 | tzp = pos->tzp; | |
791700cd HD |
352 | if (!tzp || !tzp->tbp) |
353 | continue; | |
7e8ee1e9 D |
354 | |
355 | for (i = 0; i < tzp->num_tbps; i++) { | |
356 | if (tzp->tbp[i].cdev || !tzp->tbp[i].match) | |
357 | continue; | |
358 | if (tzp->tbp[i].match(pos, cdev)) | |
359 | continue; | |
360 | tzp->tbp[i].cdev = cdev; | |
a8892d83 | 361 | __bind(pos, tzp->tbp[i].trip_mask, cdev, |
6cd9e9f6 KS |
362 | tzp->tbp[i].binding_limits, |
363 | tzp->tbp[i].weight); | |
7e8ee1e9 D |
364 | } |
365 | } | |
366 | ||
367 | mutex_unlock(&thermal_list_lock); | |
368 | } | |
369 | ||
370 | static void bind_tz(struct thermal_zone_device *tz) | |
371 | { | |
372 | int i, ret; | |
373 | struct thermal_cooling_device *pos = NULL; | |
374 | const struct thermal_zone_params *tzp = tz->tzp; | |
375 | ||
376 | if (!tzp && !tz->ops->bind) | |
377 | return; | |
378 | ||
379 | mutex_lock(&thermal_list_lock); | |
380 | ||
a9f2d19b NW |
381 | /* If there is ops->bind, try to use ops->bind */ |
382 | if (tz->ops->bind) { | |
7e8ee1e9 D |
383 | list_for_each_entry(pos, &thermal_cdev_list, node) { |
384 | ret = tz->ops->bind(tz, pos); | |
385 | if (ret) | |
386 | print_bind_err_msg(tz, pos, ret); | |
387 | } | |
388 | goto exit; | |
389 | } | |
390 | ||
791700cd | 391 | if (!tzp || !tzp->tbp) |
7e8ee1e9 D |
392 | goto exit; |
393 | ||
394 | list_for_each_entry(pos, &thermal_cdev_list, node) { | |
395 | for (i = 0; i < tzp->num_tbps; i++) { | |
396 | if (tzp->tbp[i].cdev || !tzp->tbp[i].match) | |
397 | continue; | |
398 | if (tzp->tbp[i].match(tz, pos)) | |
399 | continue; | |
400 | tzp->tbp[i].cdev = pos; | |
a8892d83 | 401 | __bind(tz, tzp->tbp[i].trip_mask, pos, |
6cd9e9f6 KS |
402 | tzp->tbp[i].binding_limits, |
403 | tzp->tbp[i].weight); | |
7e8ee1e9 D |
404 | } |
405 | } | |
406 | exit: | |
407 | mutex_unlock(&thermal_list_lock); | |
408 | } | |
409 | ||
0c01ebbf D |
410 | static void thermal_zone_device_set_polling(struct thermal_zone_device *tz, |
411 | int delay) | |
412 | { | |
413 | if (delay > 1000) | |
414 | mod_delayed_work(system_freezable_wq, &tz->poll_queue, | |
415 | round_jiffies(msecs_to_jiffies(delay))); | |
416 | else if (delay) | |
417 | mod_delayed_work(system_freezable_wq, &tz->poll_queue, | |
418 | msecs_to_jiffies(delay)); | |
419 | else | |
420 | cancel_delayed_work(&tz->poll_queue); | |
421 | } | |
422 | ||
423 | static void monitor_thermal_zone(struct thermal_zone_device *tz) | |
424 | { | |
425 | mutex_lock(&tz->lock); | |
426 | ||
427 | if (tz->passive) | |
428 | thermal_zone_device_set_polling(tz, tz->passive_delay); | |
429 | else if (tz->polling_delay) | |
430 | thermal_zone_device_set_polling(tz, tz->polling_delay); | |
431 | else | |
432 | thermal_zone_device_set_polling(tz, 0); | |
433 | ||
434 | mutex_unlock(&tz->lock); | |
435 | } | |
436 | ||
437 | static void handle_non_critical_trips(struct thermal_zone_device *tz, | |
438 | int trip, enum thermal_trip_type trip_type) | |
439 | { | |
f2234bcd ZR |
440 | tz->governor ? tz->governor->throttle(tz, trip) : |
441 | def_governor->throttle(tz, trip); | |
0c01ebbf D |
442 | } |
443 | ||
444 | static void handle_critical_trips(struct thermal_zone_device *tz, | |
445 | int trip, enum thermal_trip_type trip_type) | |
446 | { | |
17e8351a | 447 | int trip_temp; |
0c01ebbf D |
448 | |
449 | tz->ops->get_trip_temp(tz, trip, &trip_temp); | |
450 | ||
451 | /* If we have not crossed the trip_temp, we do not care. */ | |
84ffe3ec | 452 | if (trip_temp <= 0 || tz->temperature < trip_temp) |
0c01ebbf D |
453 | return; |
454 | ||
208cd822 PA |
455 | trace_thermal_zone_trip(tz, trip, trip_type); |
456 | ||
0c01ebbf D |
457 | if (tz->ops->notify) |
458 | tz->ops->notify(tz, trip, trip_type); | |
459 | ||
460 | if (trip_type == THERMAL_TRIP_CRITICAL) { | |
923e0b1e EV |
461 | dev_emerg(&tz->device, |
462 | "critical temperature reached(%d C),shutting down\n", | |
463 | tz->temperature / 1000); | |
0c01ebbf D |
464 | orderly_poweroff(true); |
465 | } | |
466 | } | |
467 | ||
468 | static void handle_thermal_trip(struct thermal_zone_device *tz, int trip) | |
469 | { | |
470 | enum thermal_trip_type type; | |
471 | ||
81ad4276 ZR |
472 | /* Ignore disabled trip points */ |
473 | if (test_bit(trip, &tz->trips_disabled)) | |
474 | return; | |
475 | ||
0c01ebbf D |
476 | tz->ops->get_trip_type(tz, trip, &type); |
477 | ||
478 | if (type == THERMAL_TRIP_CRITICAL || type == THERMAL_TRIP_HOT) | |
479 | handle_critical_trips(tz, trip, type); | |
480 | else | |
481 | handle_non_critical_trips(tz, trip, type); | |
482 | /* | |
483 | * Alright, we handled this trip successfully. | |
484 | * So, start monitoring again. | |
485 | */ | |
486 | monitor_thermal_zone(tz); | |
487 | } | |
488 | ||
489 | static void update_temperature(struct thermal_zone_device *tz) | |
490 | { | |
17e8351a | 491 | int temp, ret; |
0c01ebbf | 492 | |
e6e238c3 | 493 | ret = thermal_zone_get_temp(tz, &temp); |
0c01ebbf | 494 | if (ret) { |
7e497a73 HG |
495 | if (ret != -EAGAIN) |
496 | dev_warn(&tz->device, | |
497 | "failed to read out thermal zone (%d)\n", | |
498 | ret); | |
e6e238c3 | 499 | return; |
0c01ebbf D |
500 | } |
501 | ||
e6e238c3 | 502 | mutex_lock(&tz->lock); |
0c01ebbf D |
503 | tz->last_temperature = tz->temperature; |
504 | tz->temperature = temp; | |
0c01ebbf | 505 | mutex_unlock(&tz->lock); |
06475b55 | 506 | |
100a8fdb | 507 | trace_thermal_temperature(tz); |
bb431ba2 ZR |
508 | if (tz->last_temperature == THERMAL_TEMP_INVALID) |
509 | dev_dbg(&tz->device, "last_temperature N/A, current_temperature=%d\n", | |
510 | tz->temperature); | |
511 | else | |
512 | dev_dbg(&tz->device, "last_temperature=%d, current_temperature=%d\n", | |
513 | tz->last_temperature, tz->temperature); | |
514 | } | |
515 | ||
516 | static void thermal_zone_device_reset(struct thermal_zone_device *tz) | |
517 | { | |
518 | struct thermal_instance *pos; | |
519 | ||
520 | tz->temperature = THERMAL_TEMP_INVALID; | |
521 | tz->passive = 0; | |
522 | list_for_each_entry(pos, &tz->thermal_instances, tz_node) | |
523 | pos->initialized = false; | |
0c01ebbf D |
524 | } |
525 | ||
0e70f466 SP |
526 | void thermal_zone_device_update(struct thermal_zone_device *tz, |
527 | enum thermal_notify_event event) | |
0c01ebbf D |
528 | { |
529 | int count; | |
530 | ||
ff140fea ZR |
531 | if (atomic_read(&in_suspend)) |
532 | return; | |
533 | ||
81bd4e1c EV |
534 | if (!tz->ops->get_temp) |
535 | return; | |
536 | ||
0c01ebbf D |
537 | update_temperature(tz); |
538 | ||
060c034a SH |
539 | thermal_zone_set_trips(tz); |
540 | ||
0e70f466 SP |
541 | tz->notify_event = event; |
542 | ||
0c01ebbf D |
543 | for (count = 0; count < tz->trips; count++) |
544 | handle_thermal_trip(tz, count); | |
545 | } | |
910cb1e3 | 546 | EXPORT_SYMBOL_GPL(thermal_zone_device_update); |
0c01ebbf D |
547 | |
548 | static void thermal_zone_device_check(struct work_struct *work) | |
549 | { | |
550 | struct thermal_zone_device *tz = container_of(work, struct | |
551 | thermal_zone_device, | |
552 | poll_queue.work); | |
0e70f466 | 553 | thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED); |
0c01ebbf D |
554 | } |
555 | ||
1a7e7cc0 EV |
556 | /** |
557 | * power_actor_get_max_power() - get the maximum power that a cdev can consume | |
558 | * @cdev: pointer to &thermal_cooling_device | |
559 | * @tz: a valid thermal zone device pointer | |
560 | * @max_power: pointer in which to store the maximum power | |
561 | * | |
562 | * Calculate the maximum power consumption in milliwats that the | |
563 | * cooling device can currently consume and store it in @max_power. | |
564 | * | |
565 | * Return: 0 on success, -EINVAL if @cdev doesn't support the | |
566 | * power_actor API or -E* on other error. | |
567 | */ | |
568 | int power_actor_get_max_power(struct thermal_cooling_device *cdev, | |
569 | struct thermal_zone_device *tz, u32 *max_power) | |
570 | { | |
571 | if (!cdev_is_power_actor(cdev)) | |
572 | return -EINVAL; | |
573 | ||
574 | return cdev->ops->state2power(cdev, tz, 0, max_power); | |
575 | } | |
576 | ||
577 | /** | |
578 | * power_actor_get_min_power() - get the mainimum power that a cdev can consume | |
579 | * @cdev: pointer to &thermal_cooling_device | |
580 | * @tz: a valid thermal zone device pointer | |
581 | * @min_power: pointer in which to store the minimum power | |
582 | * | |
583 | * Calculate the minimum power consumption in milliwatts that the | |
584 | * cooling device can currently consume and store it in @min_power. | |
585 | * | |
586 | * Return: 0 on success, -EINVAL if @cdev doesn't support the | |
587 | * power_actor API or -E* on other error. | |
588 | */ | |
589 | int power_actor_get_min_power(struct thermal_cooling_device *cdev, | |
590 | struct thermal_zone_device *tz, u32 *min_power) | |
591 | { | |
592 | unsigned long max_state; | |
593 | int ret; | |
594 | ||
595 | if (!cdev_is_power_actor(cdev)) | |
596 | return -EINVAL; | |
597 | ||
598 | ret = cdev->ops->get_max_state(cdev, &max_state); | |
599 | if (ret) | |
600 | return ret; | |
601 | ||
602 | return cdev->ops->state2power(cdev, tz, max_state, min_power); | |
603 | } | |
604 | ||
605 | /** | |
606 | * power_actor_set_power() - limit the maximum power a cooling device consumes | |
607 | * @cdev: pointer to &thermal_cooling_device | |
608 | * @instance: thermal instance to update | |
609 | * @power: the power in milliwatts | |
610 | * | |
611 | * Set the cooling device to consume at most @power milliwatts. The limit is | |
612 | * expected to be a cap at the maximum power consumption. | |
613 | * | |
614 | * Return: 0 on success, -EINVAL if the cooling device does not | |
615 | * implement the power actor API or -E* for other failures. | |
616 | */ | |
617 | int power_actor_set_power(struct thermal_cooling_device *cdev, | |
618 | struct thermal_instance *instance, u32 power) | |
619 | { | |
620 | unsigned long state; | |
621 | int ret; | |
622 | ||
623 | if (!cdev_is_power_actor(cdev)) | |
624 | return -EINVAL; | |
625 | ||
626 | ret = cdev->ops->power2state(cdev, instance->tz, power, &state); | |
627 | if (ret) | |
628 | return ret; | |
629 | ||
630 | instance->target = state; | |
631 | mutex_lock(&cdev->lock); | |
632 | cdev->updated = false; | |
633 | mutex_unlock(&cdev->lock); | |
634 | thermal_cdev_update(cdev); | |
635 | ||
636 | return 0; | |
637 | } | |
638 | ||
3d0055d2 EV |
639 | void thermal_zone_device_rebind_exception(struct thermal_zone_device *tz, |
640 | const char *cdev_type, size_t size) | |
641 | { | |
642 | struct thermal_cooling_device *cdev = NULL; | |
643 | ||
644 | mutex_lock(&thermal_list_lock); | |
645 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
646 | /* skip non matching cdevs */ | |
647 | if (strncmp(cdev_type, cdev->type, size)) | |
648 | continue; | |
649 | ||
650 | /* re binding the exception matching the type pattern */ | |
651 | thermal_zone_bind_cooling_device(tz, THERMAL_TRIPS_NONE, cdev, | |
652 | THERMAL_NO_LIMIT, | |
653 | THERMAL_NO_LIMIT, | |
654 | THERMAL_WEIGHT_DEFAULT); | |
655 | } | |
656 | mutex_unlock(&thermal_list_lock); | |
657 | } | |
658 | ||
659 | void thermal_zone_device_unbind_exception(struct thermal_zone_device *tz, | |
660 | const char *cdev_type, size_t size) | |
661 | { | |
662 | struct thermal_cooling_device *cdev = NULL; | |
663 | ||
664 | mutex_lock(&thermal_list_lock); | |
665 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
666 | /* skip non matching cdevs */ | |
667 | if (strncmp(cdev_type, cdev->type, size)) | |
668 | continue; | |
669 | /* unbinding the exception matching the type pattern */ | |
670 | thermal_zone_unbind_cooling_device(tz, THERMAL_TRIPS_NONE, | |
671 | cdev); | |
672 | } | |
673 | mutex_unlock(&thermal_list_lock); | |
674 | } | |
675 | ||
203d3d4a ZR |
676 | /* Device management */ |
677 | ||
c30176fc EV |
678 | static int get_idr(struct idr *idr, struct mutex *lock, int *id) |
679 | { | |
680 | int ret; | |
681 | ||
682 | if (lock) | |
683 | mutex_lock(lock); | |
684 | ret = idr_alloc(idr, NULL, 0, 0, GFP_KERNEL); | |
685 | if (lock) | |
686 | mutex_unlock(lock); | |
687 | if (unlikely(ret < 0)) | |
688 | return ret; | |
689 | *id = ret; | |
690 | return 0; | |
691 | } | |
692 | ||
693 | static void release_idr(struct idr *idr, struct mutex *lock, int id) | |
694 | { | |
695 | if (lock) | |
696 | mutex_lock(lock); | |
697 | idr_remove(idr, id); | |
698 | if (lock) | |
699 | mutex_unlock(lock); | |
700 | } | |
701 | ||
203d3d4a | 702 | /** |
d2e4eb83 EV |
703 | * thermal_zone_bind_cooling_device() - bind a cooling device to a thermal zone |
704 | * @tz: pointer to struct thermal_zone_device | |
203d3d4a ZR |
705 | * @trip: indicates which trip point the cooling devices is |
706 | * associated with in this thermal zone. | |
d2e4eb83 EV |
707 | * @cdev: pointer to struct thermal_cooling_device |
708 | * @upper: the Maximum cooling state for this trip point. | |
709 | * THERMAL_NO_LIMIT means no upper limit, | |
710 | * and the cooling device can be in max_state. | |
711 | * @lower: the Minimum cooling state can be used for this trip point. | |
712 | * THERMAL_NO_LIMIT means no lower limit, | |
713 | * and the cooling device can be in cooling state 0. | |
6cd9e9f6 KS |
714 | * @weight: The weight of the cooling device to be bound to the |
715 | * thermal zone. Use THERMAL_WEIGHT_DEFAULT for the | |
716 | * default value | |
543a9561 | 717 | * |
d2e4eb83 EV |
718 | * This interface function bind a thermal cooling device to the certain trip |
719 | * point of a thermal zone device. | |
543a9561 | 720 | * This function is usually called in the thermal zone device .bind callback. |
d2e4eb83 EV |
721 | * |
722 | * Return: 0 on success, the proper error value otherwise. | |
203d3d4a ZR |
723 | */ |
724 | int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, | |
725 | int trip, | |
9d99842f | 726 | struct thermal_cooling_device *cdev, |
6cd9e9f6 KS |
727 | unsigned long upper, unsigned long lower, |
728 | unsigned int weight) | |
203d3d4a | 729 | { |
b81b6ba3 ZR |
730 | struct thermal_instance *dev; |
731 | struct thermal_instance *pos; | |
c7516709 TS |
732 | struct thermal_zone_device *pos1; |
733 | struct thermal_cooling_device *pos2; | |
74051ba5 | 734 | unsigned long max_state; |
9a3031dc | 735 | int result, ret; |
203d3d4a | 736 | |
543a9561 | 737 | if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE)) |
203d3d4a ZR |
738 | return -EINVAL; |
739 | ||
c7516709 TS |
740 | list_for_each_entry(pos1, &thermal_tz_list, node) { |
741 | if (pos1 == tz) | |
742 | break; | |
743 | } | |
744 | list_for_each_entry(pos2, &thermal_cdev_list, node) { | |
745 | if (pos2 == cdev) | |
746 | break; | |
747 | } | |
748 | ||
749 | if (tz != pos1 || cdev != pos2) | |
203d3d4a ZR |
750 | return -EINVAL; |
751 | ||
9a3031dc LM |
752 | ret = cdev->ops->get_max_state(cdev, &max_state); |
753 | if (ret) | |
754 | return ret; | |
9d99842f ZR |
755 | |
756 | /* lower default 0, upper default max_state */ | |
757 | lower = lower == THERMAL_NO_LIMIT ? 0 : lower; | |
758 | upper = upper == THERMAL_NO_LIMIT ? max_state : upper; | |
759 | ||
760 | if (lower > upper || upper > max_state) | |
761 | return -EINVAL; | |
762 | ||
203d3d4a | 763 | dev = |
b81b6ba3 | 764 | kzalloc(sizeof(struct thermal_instance), GFP_KERNEL); |
203d3d4a ZR |
765 | if (!dev) |
766 | return -ENOMEM; | |
767 | dev->tz = tz; | |
768 | dev->cdev = cdev; | |
769 | dev->trip = trip; | |
9d99842f ZR |
770 | dev->upper = upper; |
771 | dev->lower = lower; | |
ce119f83 | 772 | dev->target = THERMAL_NO_TARGET; |
6cd9e9f6 | 773 | dev->weight = weight; |
74051ba5 | 774 | |
203d3d4a ZR |
775 | result = get_idr(&tz->idr, &tz->lock, &dev->id); |
776 | if (result) | |
777 | goto free_mem; | |
778 | ||
779 | sprintf(dev->name, "cdev%d", dev->id); | |
780 | result = | |
781 | sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev->name); | |
782 | if (result) | |
783 | goto release_idr; | |
784 | ||
785 | sprintf(dev->attr_name, "cdev%d_trip_point", dev->id); | |
975f8c56 | 786 | sysfs_attr_init(&dev->attr.attr); |
203d3d4a ZR |
787 | dev->attr.attr.name = dev->attr_name; |
788 | dev->attr.attr.mode = 0444; | |
789 | dev->attr.show = thermal_cooling_device_trip_point_show; | |
790 | result = device_create_file(&tz->device, &dev->attr); | |
791 | if (result) | |
792 | goto remove_symbol_link; | |
793 | ||
db916513 JM |
794 | sprintf(dev->weight_attr_name, "cdev%d_weight", dev->id); |
795 | sysfs_attr_init(&dev->weight_attr.attr); | |
796 | dev->weight_attr.attr.name = dev->weight_attr_name; | |
797 | dev->weight_attr.attr.mode = S_IWUSR | S_IRUGO; | |
798 | dev->weight_attr.show = thermal_cooling_device_weight_show; | |
799 | dev->weight_attr.store = thermal_cooling_device_weight_store; | |
800 | result = device_create_file(&tz->device, &dev->weight_attr); | |
801 | if (result) | |
802 | goto remove_trip_file; | |
803 | ||
203d3d4a | 804 | mutex_lock(&tz->lock); |
f4a821ce | 805 | mutex_lock(&cdev->lock); |
cddf31b3 | 806 | list_for_each_entry(pos, &tz->thermal_instances, tz_node) |
203d3d4a ZR |
807 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
808 | result = -EEXIST; | |
809 | break; | |
810 | } | |
b5e4ae62 | 811 | if (!result) { |
cddf31b3 | 812 | list_add_tail(&dev->tz_node, &tz->thermal_instances); |
b5e4ae62 | 813 | list_add_tail(&dev->cdev_node, &cdev->thermal_instances); |
4511f716 | 814 | atomic_set(&tz->need_update, 1); |
b5e4ae62 | 815 | } |
f4a821ce | 816 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
817 | mutex_unlock(&tz->lock); |
818 | ||
819 | if (!result) | |
820 | return 0; | |
821 | ||
db916513 JM |
822 | device_remove_file(&tz->device, &dev->weight_attr); |
823 | remove_trip_file: | |
203d3d4a | 824 | device_remove_file(&tz->device, &dev->attr); |
caca8b80 | 825 | remove_symbol_link: |
203d3d4a | 826 | sysfs_remove_link(&tz->device.kobj, dev->name); |
caca8b80 | 827 | release_idr: |
203d3d4a | 828 | release_idr(&tz->idr, &tz->lock, dev->id); |
caca8b80 | 829 | free_mem: |
203d3d4a ZR |
830 | kfree(dev); |
831 | return result; | |
832 | } | |
910cb1e3 | 833 | EXPORT_SYMBOL_GPL(thermal_zone_bind_cooling_device); |
203d3d4a ZR |
834 | |
835 | /** | |
9892e5dc EV |
836 | * thermal_zone_unbind_cooling_device() - unbind a cooling device from a |
837 | * thermal zone. | |
838 | * @tz: pointer to a struct thermal_zone_device. | |
203d3d4a ZR |
839 | * @trip: indicates which trip point the cooling devices is |
840 | * associated with in this thermal zone. | |
9892e5dc | 841 | * @cdev: pointer to a struct thermal_cooling_device. |
543a9561 | 842 | * |
9892e5dc EV |
843 | * This interface function unbind a thermal cooling device from the certain |
844 | * trip point of a thermal zone device. | |
543a9561 | 845 | * This function is usually called in the thermal zone device .unbind callback. |
9892e5dc EV |
846 | * |
847 | * Return: 0 on success, the proper error value otherwise. | |
203d3d4a ZR |
848 | */ |
849 | int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz, | |
850 | int trip, | |
851 | struct thermal_cooling_device *cdev) | |
852 | { | |
b81b6ba3 | 853 | struct thermal_instance *pos, *next; |
203d3d4a ZR |
854 | |
855 | mutex_lock(&tz->lock); | |
f4a821ce | 856 | mutex_lock(&cdev->lock); |
cddf31b3 | 857 | list_for_each_entry_safe(pos, next, &tz->thermal_instances, tz_node) { |
543a9561 | 858 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
cddf31b3 | 859 | list_del(&pos->tz_node); |
b5e4ae62 | 860 | list_del(&pos->cdev_node); |
f4a821ce | 861 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
862 | mutex_unlock(&tz->lock); |
863 | goto unbind; | |
864 | } | |
865 | } | |
f4a821ce | 866 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
867 | mutex_unlock(&tz->lock); |
868 | ||
869 | return -ENODEV; | |
870 | ||
caca8b80 | 871 | unbind: |
528464ea | 872 | device_remove_file(&tz->device, &pos->weight_attr); |
203d3d4a ZR |
873 | device_remove_file(&tz->device, &pos->attr); |
874 | sysfs_remove_link(&tz->device.kobj, pos->name); | |
875 | release_idr(&tz->idr, &tz->lock, pos->id); | |
876 | kfree(pos); | |
877 | return 0; | |
878 | } | |
910cb1e3 | 879 | EXPORT_SYMBOL_GPL(thermal_zone_unbind_cooling_device); |
203d3d4a ZR |
880 | |
881 | static void thermal_release(struct device *dev) | |
882 | { | |
883 | struct thermal_zone_device *tz; | |
884 | struct thermal_cooling_device *cdev; | |
885 | ||
caca8b80 JP |
886 | if (!strncmp(dev_name(dev), "thermal_zone", |
887 | sizeof("thermal_zone") - 1)) { | |
203d3d4a ZR |
888 | tz = to_thermal_zone(dev); |
889 | kfree(tz); | |
732e4c8d | 890 | } else if(!strncmp(dev_name(dev), "cooling_device", |
891 | sizeof("cooling_device") - 1)){ | |
203d3d4a ZR |
892 | cdev = to_cooling_device(dev); |
893 | kfree(cdev); | |
894 | } | |
895 | } | |
896 | ||
897 | static struct class thermal_class = { | |
898 | .name = "thermal", | |
899 | .dev_release = thermal_release, | |
900 | }; | |
901 | ||
902 | /** | |
a116b5d4 EV |
903 | * __thermal_cooling_device_register() - register a new thermal cooling device |
904 | * @np: a pointer to a device tree node. | |
203d3d4a ZR |
905 | * @type: the thermal cooling device type. |
906 | * @devdata: device private data. | |
907 | * @ops: standard thermal cooling devices callbacks. | |
3a6eccb3 EV |
908 | * |
909 | * This interface function adds a new thermal cooling device (fan/processor/...) | |
910 | * to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself | |
911 | * to all the thermal zone devices registered at the same time. | |
a116b5d4 EV |
912 | * It also gives the opportunity to link the cooling device to a device tree |
913 | * node, so that it can be bound to a thermal zone created out of device tree. | |
3a6eccb3 EV |
914 | * |
915 | * Return: a pointer to the created struct thermal_cooling_device or an | |
916 | * ERR_PTR. Caller must check return value with IS_ERR*() helpers. | |
203d3d4a | 917 | */ |
a116b5d4 EV |
918 | static struct thermal_cooling_device * |
919 | __thermal_cooling_device_register(struct device_node *np, | |
920 | char *type, void *devdata, | |
921 | const struct thermal_cooling_device_ops *ops) | |
203d3d4a ZR |
922 | { |
923 | struct thermal_cooling_device *cdev; | |
4511f716 | 924 | struct thermal_zone_device *pos = NULL; |
203d3d4a ZR |
925 | int result; |
926 | ||
204dd1d3 | 927 | if (type && strlen(type) >= THERMAL_NAME_LENGTH) |
3e6fda5c | 928 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
929 | |
930 | if (!ops || !ops->get_max_state || !ops->get_cur_state || | |
543a9561 | 931 | !ops->set_cur_state) |
3e6fda5c | 932 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
933 | |
934 | cdev = kzalloc(sizeof(struct thermal_cooling_device), GFP_KERNEL); | |
935 | if (!cdev) | |
3e6fda5c | 936 | return ERR_PTR(-ENOMEM); |
203d3d4a ZR |
937 | |
938 | result = get_idr(&thermal_cdev_idr, &thermal_idr_lock, &cdev->id); | |
939 | if (result) { | |
940 | kfree(cdev); | |
3e6fda5c | 941 | return ERR_PTR(result); |
203d3d4a ZR |
942 | } |
943 | ||
c7a8b9d9 | 944 | strlcpy(cdev->type, type ? : "", sizeof(cdev->type)); |
f4a821ce | 945 | mutex_init(&cdev->lock); |
b5e4ae62 | 946 | INIT_LIST_HEAD(&cdev->thermal_instances); |
a116b5d4 | 947 | cdev->np = np; |
203d3d4a | 948 | cdev->ops = ops; |
5ca0cce5 | 949 | cdev->updated = false; |
203d3d4a | 950 | cdev->device.class = &thermal_class; |
45cf2ec9 | 951 | thermal_cooling_device_setup_sysfs(cdev); |
203d3d4a | 952 | cdev->devdata = devdata; |
354655ea | 953 | dev_set_name(&cdev->device, "cooling_device%d", cdev->id); |
203d3d4a ZR |
954 | result = device_register(&cdev->device); |
955 | if (result) { | |
956 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
957 | kfree(cdev); | |
3e6fda5c | 958 | return ERR_PTR(result); |
203d3d4a ZR |
959 | } |
960 | ||
7e8ee1e9 | 961 | /* Add 'this' new cdev to the global cdev list */ |
203d3d4a ZR |
962 | mutex_lock(&thermal_list_lock); |
963 | list_add(&cdev->node, &thermal_cdev_list); | |
203d3d4a ZR |
964 | mutex_unlock(&thermal_list_lock); |
965 | ||
7e8ee1e9 D |
966 | /* Update binding information for 'this' new cdev */ |
967 | bind_cdev(cdev); | |
968 | ||
4511f716 CY |
969 | mutex_lock(&thermal_list_lock); |
970 | list_for_each_entry(pos, &thermal_tz_list, node) | |
971 | if (atomic_cmpxchg(&pos->need_update, 1, 0)) | |
0e70f466 SP |
972 | thermal_zone_device_update(pos, |
973 | THERMAL_EVENT_UNSPECIFIED); | |
4511f716 CY |
974 | mutex_unlock(&thermal_list_lock); |
975 | ||
7e8ee1e9 | 976 | return cdev; |
203d3d4a | 977 | } |
a116b5d4 EV |
978 | |
979 | /** | |
980 | * thermal_cooling_device_register() - register a new thermal cooling device | |
981 | * @type: the thermal cooling device type. | |
982 | * @devdata: device private data. | |
983 | * @ops: standard thermal cooling devices callbacks. | |
984 | * | |
985 | * This interface function adds a new thermal cooling device (fan/processor/...) | |
986 | * to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself | |
987 | * to all the thermal zone devices registered at the same time. | |
988 | * | |
989 | * Return: a pointer to the created struct thermal_cooling_device or an | |
990 | * ERR_PTR. Caller must check return value with IS_ERR*() helpers. | |
991 | */ | |
992 | struct thermal_cooling_device * | |
993 | thermal_cooling_device_register(char *type, void *devdata, | |
994 | const struct thermal_cooling_device_ops *ops) | |
995 | { | |
996 | return __thermal_cooling_device_register(NULL, type, devdata, ops); | |
997 | } | |
910cb1e3 | 998 | EXPORT_SYMBOL_GPL(thermal_cooling_device_register); |
203d3d4a | 999 | |
a116b5d4 EV |
1000 | /** |
1001 | * thermal_of_cooling_device_register() - register an OF thermal cooling device | |
1002 | * @np: a pointer to a device tree node. | |
1003 | * @type: the thermal cooling device type. | |
1004 | * @devdata: device private data. | |
1005 | * @ops: standard thermal cooling devices callbacks. | |
1006 | * | |
1007 | * This function will register a cooling device with device tree node reference. | |
1008 | * This interface function adds a new thermal cooling device (fan/processor/...) | |
1009 | * to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself | |
1010 | * to all the thermal zone devices registered at the same time. | |
1011 | * | |
1012 | * Return: a pointer to the created struct thermal_cooling_device or an | |
1013 | * ERR_PTR. Caller must check return value with IS_ERR*() helpers. | |
1014 | */ | |
1015 | struct thermal_cooling_device * | |
1016 | thermal_of_cooling_device_register(struct device_node *np, | |
1017 | char *type, void *devdata, | |
1018 | const struct thermal_cooling_device_ops *ops) | |
1019 | { | |
1020 | return __thermal_cooling_device_register(np, type, devdata, ops); | |
1021 | } | |
1022 | EXPORT_SYMBOL_GPL(thermal_of_cooling_device_register); | |
1023 | ||
203d3d4a ZR |
1024 | /** |
1025 | * thermal_cooling_device_unregister - removes the registered thermal cooling device | |
203d3d4a ZR |
1026 | * @cdev: the thermal cooling device to remove. |
1027 | * | |
1028 | * thermal_cooling_device_unregister() must be called when the device is no | |
1029 | * longer needed. | |
1030 | */ | |
7e8ee1e9 | 1031 | void thermal_cooling_device_unregister(struct thermal_cooling_device *cdev) |
203d3d4a | 1032 | { |
7e8ee1e9 D |
1033 | int i; |
1034 | const struct thermal_zone_params *tzp; | |
203d3d4a ZR |
1035 | struct thermal_zone_device *tz; |
1036 | struct thermal_cooling_device *pos = NULL; | |
1037 | ||
1038 | if (!cdev) | |
1039 | return; | |
1040 | ||
1041 | mutex_lock(&thermal_list_lock); | |
1042 | list_for_each_entry(pos, &thermal_cdev_list, node) | |
1043 | if (pos == cdev) | |
1044 | break; | |
1045 | if (pos != cdev) { | |
1046 | /* thermal cooling device not found */ | |
1047 | mutex_unlock(&thermal_list_lock); | |
1048 | return; | |
1049 | } | |
1050 | list_del(&cdev->node); | |
7e8ee1e9 D |
1051 | |
1052 | /* Unbind all thermal zones associated with 'this' cdev */ | |
203d3d4a | 1053 | list_for_each_entry(tz, &thermal_tz_list, node) { |
7e8ee1e9 D |
1054 | if (tz->ops->unbind) { |
1055 | tz->ops->unbind(tz, cdev); | |
1056 | continue; | |
1057 | } | |
1058 | ||
1059 | if (!tz->tzp || !tz->tzp->tbp) | |
203d3d4a | 1060 | continue; |
7e8ee1e9 D |
1061 | |
1062 | tzp = tz->tzp; | |
1063 | for (i = 0; i < tzp->num_tbps; i++) { | |
1064 | if (tzp->tbp[i].cdev == cdev) { | |
1065 | __unbind(tz, tzp->tbp[i].trip_mask, cdev); | |
1066 | tzp->tbp[i].cdev = NULL; | |
1067 | } | |
1068 | } | |
203d3d4a | 1069 | } |
7e8ee1e9 | 1070 | |
203d3d4a | 1071 | mutex_unlock(&thermal_list_lock); |
7e8ee1e9 | 1072 | |
203d3d4a ZR |
1073 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); |
1074 | device_unregister(&cdev->device); | |
1075 | return; | |
1076 | } | |
910cb1e3 | 1077 | EXPORT_SYMBOL_GPL(thermal_cooling_device_unregister); |
203d3d4a | 1078 | |
f2b4caaf | 1079 | /** |
7b73c993 | 1080 | * thermal_notify_framework - Sensor drivers use this API to notify framework |
f2b4caaf D |
1081 | * @tz: thermal zone device |
1082 | * @trip: indicates which trip point has been crossed | |
1083 | * | |
1084 | * This function handles the trip events from sensor drivers. It starts | |
1085 | * throttling the cooling devices according to the policy configured. | |
1086 | * For CRITICAL and HOT trip points, this notifies the respective drivers, | |
1087 | * and does actual throttling for other trip points i.e ACTIVE and PASSIVE. | |
1088 | * The throttling policy is based on the configured platform data; if no | |
1089 | * platform data is provided, this uses the step_wise throttling policy. | |
1090 | */ | |
7b73c993 | 1091 | void thermal_notify_framework(struct thermal_zone_device *tz, int trip) |
f2b4caaf D |
1092 | { |
1093 | handle_thermal_trip(tz, trip); | |
1094 | } | |
910cb1e3 | 1095 | EXPORT_SYMBOL_GPL(thermal_notify_framework); |
f2b4caaf | 1096 | |
203d3d4a | 1097 | /** |
a00e55f9 | 1098 | * thermal_zone_device_register() - register a new thermal zone device |
203d3d4a ZR |
1099 | * @type: the thermal zone device type |
1100 | * @trips: the number of trip points the thermal zone support | |
c56f5c03 | 1101 | * @mask: a bit string indicating the writeablility of trip points |
203d3d4a ZR |
1102 | * @devdata: private device data |
1103 | * @ops: standard thermal zone device callbacks | |
50125a9b | 1104 | * @tzp: thermal zone platform parameters |
b1569e99 MG |
1105 | * @passive_delay: number of milliseconds to wait between polls when |
1106 | * performing passive cooling | |
1107 | * @polling_delay: number of milliseconds to wait between polls when checking | |
1108 | * whether trip points have been crossed (0 for interrupt | |
1109 | * driven systems) | |
203d3d4a | 1110 | * |
a00e55f9 EV |
1111 | * This interface function adds a new thermal zone device (sensor) to |
1112 | * /sys/class/thermal folder as thermal_zone[0-*]. It tries to bind all the | |
1113 | * thermal cooling devices registered at the same time. | |
203d3d4a | 1114 | * thermal_zone_device_unregister() must be called when the device is no |
1b7ddb84 | 1115 | * longer needed. The passive cooling depends on the .get_trend() return value. |
a00e55f9 EV |
1116 | * |
1117 | * Return: a pointer to the created struct thermal_zone_device or an | |
1118 | * in case of error, an ERR_PTR. Caller must check return value with | |
1119 | * IS_ERR*() helpers. | |
203d3d4a | 1120 | */ |
4b1bf587 | 1121 | struct thermal_zone_device *thermal_zone_device_register(const char *type, |
c56f5c03 | 1122 | int trips, int mask, void *devdata, |
4e5e4705 | 1123 | struct thermal_zone_device_ops *ops, |
6b775e87 | 1124 | struct thermal_zone_params *tzp, |
1b7ddb84 | 1125 | int passive_delay, int polling_delay) |
203d3d4a ZR |
1126 | { |
1127 | struct thermal_zone_device *tz; | |
03a971a2 | 1128 | enum thermal_trip_type trip_type; |
81ad4276 | 1129 | int trip_temp; |
203d3d4a ZR |
1130 | int result; |
1131 | int count; | |
e33df1d2 | 1132 | struct thermal_governor *governor; |
203d3d4a | 1133 | |
54fa38cc EV |
1134 | if (!type || strlen(type) == 0) |
1135 | return ERR_PTR(-EINVAL); | |
1136 | ||
204dd1d3 | 1137 | if (type && strlen(type) >= THERMAL_NAME_LENGTH) |
3e6fda5c | 1138 | return ERR_PTR(-EINVAL); |
203d3d4a | 1139 | |
c56f5c03 | 1140 | if (trips > THERMAL_MAX_TRIPS || trips < 0 || mask >> trips) |
3e6fda5c | 1141 | return ERR_PTR(-EINVAL); |
203d3d4a | 1142 | |
81bd4e1c | 1143 | if (!ops) |
3e6fda5c | 1144 | return ERR_PTR(-EINVAL); |
203d3d4a | 1145 | |
83720d0b | 1146 | if (trips > 0 && (!ops->get_trip_type || !ops->get_trip_temp)) |
6b2aa51d EV |
1147 | return ERR_PTR(-EINVAL); |
1148 | ||
203d3d4a ZR |
1149 | tz = kzalloc(sizeof(struct thermal_zone_device), GFP_KERNEL); |
1150 | if (!tz) | |
3e6fda5c | 1151 | return ERR_PTR(-ENOMEM); |
203d3d4a | 1152 | |
2d374139 | 1153 | INIT_LIST_HEAD(&tz->thermal_instances); |
203d3d4a ZR |
1154 | idr_init(&tz->idr); |
1155 | mutex_init(&tz->lock); | |
1156 | result = get_idr(&thermal_tz_idr, &thermal_idr_lock, &tz->id); | |
1157 | if (result) { | |
1158 | kfree(tz); | |
3e6fda5c | 1159 | return ERR_PTR(result); |
203d3d4a ZR |
1160 | } |
1161 | ||
54fa38cc | 1162 | strlcpy(tz->type, type, sizeof(tz->type)); |
203d3d4a | 1163 | tz->ops = ops; |
50125a9b | 1164 | tz->tzp = tzp; |
203d3d4a ZR |
1165 | tz->device.class = &thermal_class; |
1166 | tz->devdata = devdata; | |
1167 | tz->trips = trips; | |
b1569e99 MG |
1168 | tz->passive_delay = passive_delay; |
1169 | tz->polling_delay = polling_delay; | |
1c600861 | 1170 | |
4d0fe749 | 1171 | /* sys I/F */ |
1c600861 | 1172 | /* Add nodes that are always present via .groups */ |
4d0fe749 EV |
1173 | result = thermal_zone_create_device_groups(tz, mask); |
1174 | if (result) | |
1175 | goto unregister; | |
1176 | ||
4511f716 CY |
1177 | /* A new thermal zone needs to be updated anyway. */ |
1178 | atomic_set(&tz->need_update, 1); | |
b1569e99 | 1179 | |
354655ea | 1180 | dev_set_name(&tz->device, "thermal_zone%d", tz->id); |
203d3d4a ZR |
1181 | result = device_register(&tz->device); |
1182 | if (result) { | |
1183 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); | |
1184 | kfree(tz); | |
3e6fda5c | 1185 | return ERR_PTR(result); |
203d3d4a ZR |
1186 | } |
1187 | ||
203d3d4a | 1188 | for (count = 0; count < trips; count++) { |
81ad4276 ZR |
1189 | if (tz->ops->get_trip_type(tz, count, &trip_type)) |
1190 | set_bit(count, &tz->trips_disabled); | |
81ad4276 ZR |
1191 | if (tz->ops->get_trip_temp(tz, count, &trip_temp)) |
1192 | set_bit(count, &tz->trips_disabled); | |
1193 | /* Check for bogus trip points */ | |
1194 | if (trip_temp == 0) | |
1195 | set_bit(count, &tz->trips_disabled); | |
203d3d4a ZR |
1196 | } |
1197 | ||
a4a15485 D |
1198 | /* Update 'this' zone's governor information */ |
1199 | mutex_lock(&thermal_governor_lock); | |
1200 | ||
1201 | if (tz->tzp) | |
e33df1d2 | 1202 | governor = __find_governor(tz->tzp->governor_name); |
a4a15485 | 1203 | else |
e33df1d2 JM |
1204 | governor = def_governor; |
1205 | ||
1206 | result = thermal_set_governor(tz, governor); | |
1207 | if (result) { | |
1208 | mutex_unlock(&thermal_governor_lock); | |
1209 | goto unregister; | |
1210 | } | |
a4a15485 D |
1211 | |
1212 | mutex_unlock(&thermal_governor_lock); | |
1213 | ||
ccba4ffd EV |
1214 | if (!tz->tzp || !tz->tzp->no_hwmon) { |
1215 | result = thermal_add_hwmon_sysfs(tz); | |
1216 | if (result) | |
1217 | goto unregister; | |
1218 | } | |
e68b16ab | 1219 | |
203d3d4a ZR |
1220 | mutex_lock(&thermal_list_lock); |
1221 | list_add_tail(&tz->node, &thermal_tz_list); | |
203d3d4a ZR |
1222 | mutex_unlock(&thermal_list_lock); |
1223 | ||
7e8ee1e9 D |
1224 | /* Bind cooling devices for this zone */ |
1225 | bind_tz(tz); | |
1226 | ||
b1569e99 MG |
1227 | INIT_DELAYED_WORK(&(tz->poll_queue), thermal_zone_device_check); |
1228 | ||
bb431ba2 | 1229 | thermal_zone_device_reset(tz); |
4511f716 CY |
1230 | /* Update the new thermal zone and mark it as already updated. */ |
1231 | if (atomic_cmpxchg(&tz->need_update, 1, 0)) | |
0e70f466 | 1232 | thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED); |
b1569e99 | 1233 | |
14015860 | 1234 | return tz; |
203d3d4a | 1235 | |
caca8b80 | 1236 | unregister: |
203d3d4a ZR |
1237 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1238 | device_unregister(&tz->device); | |
3e6fda5c | 1239 | return ERR_PTR(result); |
203d3d4a | 1240 | } |
910cb1e3 | 1241 | EXPORT_SYMBOL_GPL(thermal_zone_device_register); |
203d3d4a ZR |
1242 | |
1243 | /** | |
1244 | * thermal_device_unregister - removes the registered thermal zone device | |
203d3d4a ZR |
1245 | * @tz: the thermal zone device to remove |
1246 | */ | |
1247 | void thermal_zone_device_unregister(struct thermal_zone_device *tz) | |
1248 | { | |
7e8ee1e9 D |
1249 | int i; |
1250 | const struct thermal_zone_params *tzp; | |
203d3d4a ZR |
1251 | struct thermal_cooling_device *cdev; |
1252 | struct thermal_zone_device *pos = NULL; | |
203d3d4a ZR |
1253 | |
1254 | if (!tz) | |
1255 | return; | |
1256 | ||
7e8ee1e9 D |
1257 | tzp = tz->tzp; |
1258 | ||
203d3d4a ZR |
1259 | mutex_lock(&thermal_list_lock); |
1260 | list_for_each_entry(pos, &thermal_tz_list, node) | |
1261 | if (pos == tz) | |
1262 | break; | |
1263 | if (pos != tz) { | |
1264 | /* thermal zone device not found */ | |
1265 | mutex_unlock(&thermal_list_lock); | |
1266 | return; | |
1267 | } | |
1268 | list_del(&tz->node); | |
7e8ee1e9 D |
1269 | |
1270 | /* Unbind all cdevs associated with 'this' thermal zone */ | |
1271 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
1272 | if (tz->ops->unbind) { | |
1273 | tz->ops->unbind(tz, cdev); | |
1274 | continue; | |
1275 | } | |
1276 | ||
1277 | if (!tzp || !tzp->tbp) | |
1278 | break; | |
1279 | ||
1280 | for (i = 0; i < tzp->num_tbps; i++) { | |
1281 | if (tzp->tbp[i].cdev == cdev) { | |
1282 | __unbind(tz, tzp->tbp[i].trip_mask, cdev); | |
1283 | tzp->tbp[i].cdev = NULL; | |
1284 | } | |
1285 | } | |
1286 | } | |
1287 | ||
203d3d4a ZR |
1288 | mutex_unlock(&thermal_list_lock); |
1289 | ||
b1569e99 MG |
1290 | thermal_zone_device_set_polling(tz, 0); |
1291 | ||
4d0fe749 EV |
1292 | kfree(tz->trip_type_attrs); |
1293 | kfree(tz->trip_temp_attrs); | |
1294 | kfree(tz->trip_hyst_attrs); | |
1295 | kfree(tz->trips_attribute_group.attrs); | |
e33df1d2 | 1296 | thermal_set_governor(tz, NULL); |
203d3d4a | 1297 | |
e68b16ab | 1298 | thermal_remove_hwmon_sysfs(tz); |
203d3d4a ZR |
1299 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1300 | idr_destroy(&tz->idr); | |
1301 | mutex_destroy(&tz->lock); | |
1302 | device_unregister(&tz->device); | |
e161aefb | 1303 | kfree(tz->device.groups); |
203d3d4a | 1304 | } |
910cb1e3 | 1305 | EXPORT_SYMBOL_GPL(thermal_zone_device_unregister); |
203d3d4a | 1306 | |
63c4d919 EV |
1307 | /** |
1308 | * thermal_zone_get_zone_by_name() - search for a zone and returns its ref | |
1309 | * @name: thermal zone name to fetch the temperature | |
1310 | * | |
1311 | * When only one zone is found with the passed name, returns a reference to it. | |
1312 | * | |
1313 | * Return: On success returns a reference to an unique thermal zone with | |
1314 | * matching name equals to @name, an ERR_PTR otherwise (-EINVAL for invalid | |
1315 | * paramenters, -ENODEV for not found and -EEXIST for multiple matches). | |
1316 | */ | |
1317 | struct thermal_zone_device *thermal_zone_get_zone_by_name(const char *name) | |
1318 | { | |
1319 | struct thermal_zone_device *pos = NULL, *ref = ERR_PTR(-EINVAL); | |
1320 | unsigned int found = 0; | |
1321 | ||
1322 | if (!name) | |
1323 | goto exit; | |
1324 | ||
1325 | mutex_lock(&thermal_list_lock); | |
1326 | list_for_each_entry(pos, &thermal_tz_list, node) | |
484ac2f3 | 1327 | if (!strncasecmp(name, pos->type, THERMAL_NAME_LENGTH)) { |
63c4d919 EV |
1328 | found++; |
1329 | ref = pos; | |
1330 | } | |
1331 | mutex_unlock(&thermal_list_lock); | |
1332 | ||
1333 | /* nothing has been found, thus an error code for it */ | |
1334 | if (found == 0) | |
1335 | ref = ERR_PTR(-ENODEV); | |
1336 | else if (found > 1) | |
1337 | /* Success only when an unique zone is found */ | |
1338 | ref = ERR_PTR(-EEXIST); | |
1339 | ||
1340 | exit: | |
1341 | return ref; | |
1342 | } | |
1343 | EXPORT_SYMBOL_GPL(thermal_zone_get_zone_by_name); | |
1344 | ||
4a7069a3 RN |
1345 | /** |
1346 | * thermal_zone_get_slope - return the slope attribute of the thermal zone | |
1347 | * @tz: thermal zone device with the slope attribute | |
1348 | * | |
1349 | * Return: If the thermal zone device has a slope attribute, return it, else | |
1350 | * return 1. | |
1351 | */ | |
1352 | int thermal_zone_get_slope(struct thermal_zone_device *tz) | |
1353 | { | |
1354 | if (tz && tz->tzp) | |
1355 | return tz->tzp->slope; | |
1356 | return 1; | |
1357 | } | |
1358 | EXPORT_SYMBOL_GPL(thermal_zone_get_slope); | |
1359 | ||
1360 | /** | |
1361 | * thermal_zone_get_offset - return the offset attribute of the thermal zone | |
1362 | * @tz: thermal zone device with the offset attribute | |
1363 | * | |
1364 | * Return: If the thermal zone device has a offset attribute, return it, else | |
1365 | * return 0. | |
1366 | */ | |
1367 | int thermal_zone_get_offset(struct thermal_zone_device *tz) | |
1368 | { | |
1369 | if (tz && tz->tzp) | |
1370 | return tz->tzp->offset; | |
1371 | return 0; | |
1372 | } | |
1373 | EXPORT_SYMBOL_GPL(thermal_zone_get_offset); | |
1374 | ||
af06216a | 1375 | #ifdef CONFIG_NET |
2a94fe48 JB |
1376 | static const struct genl_multicast_group thermal_event_mcgrps[] = { |
1377 | { .name = THERMAL_GENL_MCAST_GROUP_NAME, }, | |
1378 | }; | |
1379 | ||
af06216a RW |
1380 | static struct genl_family thermal_event_genl_family = { |
1381 | .id = GENL_ID_GENERATE, | |
1382 | .name = THERMAL_GENL_FAMILY_NAME, | |
1383 | .version = THERMAL_GENL_VERSION, | |
1384 | .maxattr = THERMAL_GENL_ATTR_MAX, | |
2a94fe48 JB |
1385 | .mcgrps = thermal_event_mcgrps, |
1386 | .n_mcgrps = ARRAY_SIZE(thermal_event_mcgrps), | |
af06216a RW |
1387 | }; |
1388 | ||
8ab3e6a0 EV |
1389 | int thermal_generate_netlink_event(struct thermal_zone_device *tz, |
1390 | enum events event) | |
4cb18728 D |
1391 | { |
1392 | struct sk_buff *skb; | |
1393 | struct nlattr *attr; | |
1394 | struct thermal_genl_event *thermal_event; | |
1395 | void *msg_header; | |
1396 | int size; | |
1397 | int result; | |
b11de07c | 1398 | static unsigned int thermal_event_seqnum; |
4cb18728 | 1399 | |
8ab3e6a0 EV |
1400 | if (!tz) |
1401 | return -EINVAL; | |
1402 | ||
4cb18728 | 1403 | /* allocate memory */ |
886ee546 JP |
1404 | size = nla_total_size(sizeof(struct thermal_genl_event)) + |
1405 | nla_total_size(0); | |
4cb18728 D |
1406 | |
1407 | skb = genlmsg_new(size, GFP_ATOMIC); | |
1408 | if (!skb) | |
1409 | return -ENOMEM; | |
1410 | ||
1411 | /* add the genetlink message header */ | |
1412 | msg_header = genlmsg_put(skb, 0, thermal_event_seqnum++, | |
1413 | &thermal_event_genl_family, 0, | |
1414 | THERMAL_GENL_CMD_EVENT); | |
1415 | if (!msg_header) { | |
1416 | nlmsg_free(skb); | |
1417 | return -ENOMEM; | |
1418 | } | |
1419 | ||
1420 | /* fill the data */ | |
886ee546 JP |
1421 | attr = nla_reserve(skb, THERMAL_GENL_ATTR_EVENT, |
1422 | sizeof(struct thermal_genl_event)); | |
4cb18728 D |
1423 | |
1424 | if (!attr) { | |
1425 | nlmsg_free(skb); | |
1426 | return -EINVAL; | |
1427 | } | |
1428 | ||
1429 | thermal_event = nla_data(attr); | |
1430 | if (!thermal_event) { | |
1431 | nlmsg_free(skb); | |
1432 | return -EINVAL; | |
1433 | } | |
1434 | ||
1435 | memset(thermal_event, 0, sizeof(struct thermal_genl_event)); | |
1436 | ||
8ab3e6a0 | 1437 | thermal_event->orig = tz->id; |
4cb18728 D |
1438 | thermal_event->event = event; |
1439 | ||
1440 | /* send multicast genetlink message */ | |
053c095a | 1441 | genlmsg_end(skb, msg_header); |
4cb18728 | 1442 | |
68eb5503 | 1443 | result = genlmsg_multicast(&thermal_event_genl_family, skb, 0, |
2a94fe48 | 1444 | 0, GFP_ATOMIC); |
4cb18728 | 1445 | if (result) |
923e0b1e | 1446 | dev_err(&tz->device, "Failed to send netlink event:%d", result); |
4cb18728 D |
1447 | |
1448 | return result; | |
1449 | } | |
910cb1e3 | 1450 | EXPORT_SYMBOL_GPL(thermal_generate_netlink_event); |
4cb18728 D |
1451 | |
1452 | static int genetlink_init(void) | |
1453 | { | |
2a94fe48 | 1454 | return genl_register_family(&thermal_event_genl_family); |
4cb18728 D |
1455 | } |
1456 | ||
af06216a RW |
1457 | static void genetlink_exit(void) |
1458 | { | |
1459 | genl_unregister_family(&thermal_event_genl_family); | |
1460 | } | |
1461 | #else /* !CONFIG_NET */ | |
1462 | static inline int genetlink_init(void) { return 0; } | |
1463 | static inline void genetlink_exit(void) {} | |
1464 | #endif /* !CONFIG_NET */ | |
1465 | ||
ff140fea ZR |
1466 | static int thermal_pm_notify(struct notifier_block *nb, |
1467 | unsigned long mode, void *_unused) | |
1468 | { | |
1469 | struct thermal_zone_device *tz; | |
1470 | ||
1471 | switch (mode) { | |
1472 | case PM_HIBERNATION_PREPARE: | |
1473 | case PM_RESTORE_PREPARE: | |
1474 | case PM_SUSPEND_PREPARE: | |
1475 | atomic_set(&in_suspend, 1); | |
1476 | break; | |
1477 | case PM_POST_HIBERNATION: | |
1478 | case PM_POST_RESTORE: | |
1479 | case PM_POST_SUSPEND: | |
1480 | atomic_set(&in_suspend, 0); | |
1481 | list_for_each_entry(tz, &thermal_tz_list, node) { | |
1482 | thermal_zone_device_reset(tz); | |
0e70f466 SP |
1483 | thermal_zone_device_update(tz, |
1484 | THERMAL_EVENT_UNSPECIFIED); | |
ff140fea ZR |
1485 | } |
1486 | break; | |
1487 | default: | |
1488 | break; | |
1489 | } | |
1490 | return 0; | |
1491 | } | |
1492 | ||
1493 | static struct notifier_block thermal_pm_nb = { | |
1494 | .notifier_call = thermal_pm_notify, | |
1495 | }; | |
1496 | ||
203d3d4a ZR |
1497 | static int __init thermal_init(void) |
1498 | { | |
80a26a5c ZR |
1499 | int result; |
1500 | ||
1501 | result = thermal_register_governors(); | |
1502 | if (result) | |
1503 | goto error; | |
203d3d4a ZR |
1504 | |
1505 | result = class_register(&thermal_class); | |
80a26a5c ZR |
1506 | if (result) |
1507 | goto unregister_governors; | |
1508 | ||
4cb18728 | 1509 | result = genetlink_init(); |
80a26a5c ZR |
1510 | if (result) |
1511 | goto unregister_class; | |
1512 | ||
4e5e4705 EV |
1513 | result = of_parse_thermal_zones(); |
1514 | if (result) | |
1515 | goto exit_netlink; | |
1516 | ||
ff140fea ZR |
1517 | result = register_pm_notifier(&thermal_pm_nb); |
1518 | if (result) | |
1519 | pr_warn("Thermal: Can not register suspend notifier, return %d\n", | |
1520 | result); | |
1521 | ||
80a26a5c ZR |
1522 | return 0; |
1523 | ||
4e5e4705 EV |
1524 | exit_netlink: |
1525 | genetlink_exit(); | |
80a26a5c ZR |
1526 | unregister_class: |
1527 | class_unregister(&thermal_class); | |
9d367e5e LH |
1528 | unregister_governors: |
1529 | thermal_unregister_governors(); | |
80a26a5c ZR |
1530 | error: |
1531 | idr_destroy(&thermal_tz_idr); | |
1532 | idr_destroy(&thermal_cdev_idr); | |
1533 | mutex_destroy(&thermal_idr_lock); | |
1534 | mutex_destroy(&thermal_list_lock); | |
1535 | mutex_destroy(&thermal_governor_lock); | |
203d3d4a ZR |
1536 | return result; |
1537 | } | |
1538 | ||
1539 | static void __exit thermal_exit(void) | |
1540 | { | |
ff140fea | 1541 | unregister_pm_notifier(&thermal_pm_nb); |
4e5e4705 | 1542 | of_thermal_destroy_zones(); |
80a26a5c | 1543 | genetlink_exit(); |
203d3d4a | 1544 | class_unregister(&thermal_class); |
80a26a5c | 1545 | thermal_unregister_governors(); |
203d3d4a ZR |
1546 | idr_destroy(&thermal_tz_idr); |
1547 | idr_destroy(&thermal_cdev_idr); | |
1548 | mutex_destroy(&thermal_idr_lock); | |
1549 | mutex_destroy(&thermal_list_lock); | |
80a26a5c | 1550 | mutex_destroy(&thermal_governor_lock); |
203d3d4a ZR |
1551 | } |
1552 | ||
4cb18728 | 1553 | fs_initcall(thermal_init); |
203d3d4a | 1554 | module_exit(thermal_exit); |