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Commit | Line | Data |
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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 | ||
8772e185 EV |
289 | /* |
290 | * Zone update section: main control loop applied to each zone while monitoring | |
291 | * | |
292 | * in polling mode. The monitoring is done using a workqueue. | |
293 | * Same update may be done on a zone by calling thermal_zone_device_update(). | |
294 | * | |
295 | * An update means: | |
296 | * - Non-critical trips will invoke the governor responsible for that zone; | |
297 | * - Hot trips will produce a notification to userspace; | |
298 | * - Critical trip point will cause a system shutdown. | |
299 | */ | |
0c01ebbf D |
300 | static void thermal_zone_device_set_polling(struct thermal_zone_device *tz, |
301 | int delay) | |
302 | { | |
303 | if (delay > 1000) | |
304 | mod_delayed_work(system_freezable_wq, &tz->poll_queue, | |
305 | round_jiffies(msecs_to_jiffies(delay))); | |
306 | else if (delay) | |
307 | mod_delayed_work(system_freezable_wq, &tz->poll_queue, | |
308 | msecs_to_jiffies(delay)); | |
309 | else | |
310 | cancel_delayed_work(&tz->poll_queue); | |
311 | } | |
312 | ||
313 | static void monitor_thermal_zone(struct thermal_zone_device *tz) | |
314 | { | |
315 | mutex_lock(&tz->lock); | |
316 | ||
317 | if (tz->passive) | |
318 | thermal_zone_device_set_polling(tz, tz->passive_delay); | |
319 | else if (tz->polling_delay) | |
320 | thermal_zone_device_set_polling(tz, tz->polling_delay); | |
321 | else | |
322 | thermal_zone_device_set_polling(tz, 0); | |
323 | ||
324 | mutex_unlock(&tz->lock); | |
325 | } | |
326 | ||
327 | static void handle_non_critical_trips(struct thermal_zone_device *tz, | |
328 | int trip, enum thermal_trip_type trip_type) | |
329 | { | |
f2234bcd ZR |
330 | tz->governor ? tz->governor->throttle(tz, trip) : |
331 | def_governor->throttle(tz, trip); | |
0c01ebbf D |
332 | } |
333 | ||
334 | static void handle_critical_trips(struct thermal_zone_device *tz, | |
335 | int trip, enum thermal_trip_type trip_type) | |
336 | { | |
17e8351a | 337 | int trip_temp; |
0c01ebbf D |
338 | |
339 | tz->ops->get_trip_temp(tz, trip, &trip_temp); | |
340 | ||
341 | /* If we have not crossed the trip_temp, we do not care. */ | |
84ffe3ec | 342 | if (trip_temp <= 0 || tz->temperature < trip_temp) |
0c01ebbf D |
343 | return; |
344 | ||
208cd822 PA |
345 | trace_thermal_zone_trip(tz, trip, trip_type); |
346 | ||
0c01ebbf D |
347 | if (tz->ops->notify) |
348 | tz->ops->notify(tz, trip, trip_type); | |
349 | ||
350 | if (trip_type == THERMAL_TRIP_CRITICAL) { | |
923e0b1e EV |
351 | dev_emerg(&tz->device, |
352 | "critical temperature reached(%d C),shutting down\n", | |
353 | tz->temperature / 1000); | |
0c01ebbf D |
354 | orderly_poweroff(true); |
355 | } | |
356 | } | |
357 | ||
358 | static void handle_thermal_trip(struct thermal_zone_device *tz, int trip) | |
359 | { | |
360 | enum thermal_trip_type type; | |
361 | ||
81ad4276 ZR |
362 | /* Ignore disabled trip points */ |
363 | if (test_bit(trip, &tz->trips_disabled)) | |
364 | return; | |
365 | ||
0c01ebbf D |
366 | tz->ops->get_trip_type(tz, trip, &type); |
367 | ||
368 | if (type == THERMAL_TRIP_CRITICAL || type == THERMAL_TRIP_HOT) | |
369 | handle_critical_trips(tz, trip, type); | |
370 | else | |
371 | handle_non_critical_trips(tz, trip, type); | |
372 | /* | |
373 | * Alright, we handled this trip successfully. | |
374 | * So, start monitoring again. | |
375 | */ | |
376 | monitor_thermal_zone(tz); | |
377 | } | |
378 | ||
379 | static void update_temperature(struct thermal_zone_device *tz) | |
380 | { | |
17e8351a | 381 | int temp, ret; |
0c01ebbf | 382 | |
e6e238c3 | 383 | ret = thermal_zone_get_temp(tz, &temp); |
0c01ebbf | 384 | if (ret) { |
7e497a73 HG |
385 | if (ret != -EAGAIN) |
386 | dev_warn(&tz->device, | |
387 | "failed to read out thermal zone (%d)\n", | |
388 | ret); | |
e6e238c3 | 389 | return; |
0c01ebbf D |
390 | } |
391 | ||
e6e238c3 | 392 | mutex_lock(&tz->lock); |
0c01ebbf D |
393 | tz->last_temperature = tz->temperature; |
394 | tz->temperature = temp; | |
0c01ebbf | 395 | mutex_unlock(&tz->lock); |
06475b55 | 396 | |
100a8fdb | 397 | trace_thermal_temperature(tz); |
bb431ba2 ZR |
398 | if (tz->last_temperature == THERMAL_TEMP_INVALID) |
399 | dev_dbg(&tz->device, "last_temperature N/A, current_temperature=%d\n", | |
400 | tz->temperature); | |
401 | else | |
402 | dev_dbg(&tz->device, "last_temperature=%d, current_temperature=%d\n", | |
403 | tz->last_temperature, tz->temperature); | |
404 | } | |
405 | ||
406 | static void thermal_zone_device_reset(struct thermal_zone_device *tz) | |
407 | { | |
408 | struct thermal_instance *pos; | |
409 | ||
410 | tz->temperature = THERMAL_TEMP_INVALID; | |
411 | tz->passive = 0; | |
412 | list_for_each_entry(pos, &tz->thermal_instances, tz_node) | |
413 | pos->initialized = false; | |
0c01ebbf D |
414 | } |
415 | ||
0e70f466 SP |
416 | void thermal_zone_device_update(struct thermal_zone_device *tz, |
417 | enum thermal_notify_event event) | |
0c01ebbf D |
418 | { |
419 | int count; | |
420 | ||
ff140fea ZR |
421 | if (atomic_read(&in_suspend)) |
422 | return; | |
423 | ||
81bd4e1c EV |
424 | if (!tz->ops->get_temp) |
425 | return; | |
426 | ||
0c01ebbf D |
427 | update_temperature(tz); |
428 | ||
060c034a SH |
429 | thermal_zone_set_trips(tz); |
430 | ||
0e70f466 SP |
431 | tz->notify_event = event; |
432 | ||
0c01ebbf D |
433 | for (count = 0; count < tz->trips; count++) |
434 | handle_thermal_trip(tz, count); | |
435 | } | |
910cb1e3 | 436 | EXPORT_SYMBOL_GPL(thermal_zone_device_update); |
0c01ebbf | 437 | |
106339ab EV |
438 | /** |
439 | * thermal_notify_framework - Sensor drivers use this API to notify framework | |
440 | * @tz: thermal zone device | |
441 | * @trip: indicates which trip point has been crossed | |
442 | * | |
443 | * This function handles the trip events from sensor drivers. It starts | |
444 | * throttling the cooling devices according to the policy configured. | |
445 | * For CRITICAL and HOT trip points, this notifies the respective drivers, | |
446 | * and does actual throttling for other trip points i.e ACTIVE and PASSIVE. | |
447 | * The throttling policy is based on the configured platform data; if no | |
448 | * platform data is provided, this uses the step_wise throttling policy. | |
449 | */ | |
450 | void thermal_notify_framework(struct thermal_zone_device *tz, int trip) | |
451 | { | |
452 | handle_thermal_trip(tz, trip); | |
453 | } | |
454 | EXPORT_SYMBOL_GPL(thermal_notify_framework); | |
455 | ||
0c01ebbf D |
456 | static void thermal_zone_device_check(struct work_struct *work) |
457 | { | |
458 | struct thermal_zone_device *tz = container_of(work, struct | |
459 | thermal_zone_device, | |
460 | poll_queue.work); | |
0e70f466 | 461 | thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED); |
0c01ebbf D |
462 | } |
463 | ||
712afbdf EV |
464 | /* |
465 | * Power actor section: interface to power actors to estimate power | |
466 | * | |
467 | * Set of functions used to interact to cooling devices that know | |
468 | * how to estimate their devices power consumption. | |
469 | */ | |
470 | ||
1a7e7cc0 EV |
471 | /** |
472 | * power_actor_get_max_power() - get the maximum power that a cdev can consume | |
473 | * @cdev: pointer to &thermal_cooling_device | |
474 | * @tz: a valid thermal zone device pointer | |
475 | * @max_power: pointer in which to store the maximum power | |
476 | * | |
477 | * Calculate the maximum power consumption in milliwats that the | |
478 | * cooling device can currently consume and store it in @max_power. | |
479 | * | |
480 | * Return: 0 on success, -EINVAL if @cdev doesn't support the | |
481 | * power_actor API or -E* on other error. | |
482 | */ | |
483 | int power_actor_get_max_power(struct thermal_cooling_device *cdev, | |
484 | struct thermal_zone_device *tz, u32 *max_power) | |
485 | { | |
486 | if (!cdev_is_power_actor(cdev)) | |
487 | return -EINVAL; | |
488 | ||
489 | return cdev->ops->state2power(cdev, tz, 0, max_power); | |
490 | } | |
491 | ||
492 | /** | |
493 | * power_actor_get_min_power() - get the mainimum power that a cdev can consume | |
494 | * @cdev: pointer to &thermal_cooling_device | |
495 | * @tz: a valid thermal zone device pointer | |
496 | * @min_power: pointer in which to store the minimum power | |
497 | * | |
498 | * Calculate the minimum power consumption in milliwatts that the | |
499 | * cooling device can currently consume and store it in @min_power. | |
500 | * | |
501 | * Return: 0 on success, -EINVAL if @cdev doesn't support the | |
502 | * power_actor API or -E* on other error. | |
503 | */ | |
504 | int power_actor_get_min_power(struct thermal_cooling_device *cdev, | |
505 | struct thermal_zone_device *tz, u32 *min_power) | |
506 | { | |
507 | unsigned long max_state; | |
508 | int ret; | |
509 | ||
510 | if (!cdev_is_power_actor(cdev)) | |
511 | return -EINVAL; | |
512 | ||
513 | ret = cdev->ops->get_max_state(cdev, &max_state); | |
514 | if (ret) | |
515 | return ret; | |
516 | ||
517 | return cdev->ops->state2power(cdev, tz, max_state, min_power); | |
518 | } | |
519 | ||
520 | /** | |
521 | * power_actor_set_power() - limit the maximum power a cooling device consumes | |
522 | * @cdev: pointer to &thermal_cooling_device | |
523 | * @instance: thermal instance to update | |
524 | * @power: the power in milliwatts | |
525 | * | |
526 | * Set the cooling device to consume at most @power milliwatts. The limit is | |
527 | * expected to be a cap at the maximum power consumption. | |
528 | * | |
529 | * Return: 0 on success, -EINVAL if the cooling device does not | |
530 | * implement the power actor API or -E* for other failures. | |
531 | */ | |
532 | int power_actor_set_power(struct thermal_cooling_device *cdev, | |
533 | struct thermal_instance *instance, u32 power) | |
534 | { | |
535 | unsigned long state; | |
536 | int ret; | |
537 | ||
538 | if (!cdev_is_power_actor(cdev)) | |
539 | return -EINVAL; | |
540 | ||
541 | ret = cdev->ops->power2state(cdev, instance->tz, power, &state); | |
542 | if (ret) | |
543 | return ret; | |
544 | ||
545 | instance->target = state; | |
546 | mutex_lock(&cdev->lock); | |
547 | cdev->updated = false; | |
548 | mutex_unlock(&cdev->lock); | |
549 | thermal_cdev_update(cdev); | |
550 | ||
551 | return 0; | |
552 | } | |
553 | ||
3d0055d2 EV |
554 | void thermal_zone_device_rebind_exception(struct thermal_zone_device *tz, |
555 | const char *cdev_type, size_t size) | |
556 | { | |
557 | struct thermal_cooling_device *cdev = NULL; | |
558 | ||
559 | mutex_lock(&thermal_list_lock); | |
560 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
561 | /* skip non matching cdevs */ | |
562 | if (strncmp(cdev_type, cdev->type, size)) | |
563 | continue; | |
564 | ||
565 | /* re binding the exception matching the type pattern */ | |
566 | thermal_zone_bind_cooling_device(tz, THERMAL_TRIPS_NONE, cdev, | |
567 | THERMAL_NO_LIMIT, | |
568 | THERMAL_NO_LIMIT, | |
569 | THERMAL_WEIGHT_DEFAULT); | |
570 | } | |
571 | mutex_unlock(&thermal_list_lock); | |
572 | } | |
573 | ||
574 | void thermal_zone_device_unbind_exception(struct thermal_zone_device *tz, | |
575 | const char *cdev_type, size_t size) | |
576 | { | |
577 | struct thermal_cooling_device *cdev = NULL; | |
578 | ||
579 | mutex_lock(&thermal_list_lock); | |
580 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
581 | /* skip non matching cdevs */ | |
582 | if (strncmp(cdev_type, cdev->type, size)) | |
583 | continue; | |
584 | /* unbinding the exception matching the type pattern */ | |
585 | thermal_zone_unbind_cooling_device(tz, THERMAL_TRIPS_NONE, | |
586 | cdev); | |
587 | } | |
588 | mutex_unlock(&thermal_list_lock); | |
589 | } | |
590 | ||
203d3d4a ZR |
591 | /* Device management */ |
592 | ||
c30176fc EV |
593 | static int get_idr(struct idr *idr, struct mutex *lock, int *id) |
594 | { | |
595 | int ret; | |
596 | ||
597 | if (lock) | |
598 | mutex_lock(lock); | |
599 | ret = idr_alloc(idr, NULL, 0, 0, GFP_KERNEL); | |
600 | if (lock) | |
601 | mutex_unlock(lock); | |
602 | if (unlikely(ret < 0)) | |
603 | return ret; | |
604 | *id = ret; | |
605 | return 0; | |
606 | } | |
607 | ||
608 | static void release_idr(struct idr *idr, struct mutex *lock, int id) | |
609 | { | |
610 | if (lock) | |
611 | mutex_lock(lock); | |
612 | idr_remove(idr, id); | |
613 | if (lock) | |
614 | mutex_unlock(lock); | |
615 | } | |
616 | ||
203d3d4a | 617 | /** |
d2e4eb83 EV |
618 | * thermal_zone_bind_cooling_device() - bind a cooling device to a thermal zone |
619 | * @tz: pointer to struct thermal_zone_device | |
203d3d4a ZR |
620 | * @trip: indicates which trip point the cooling devices is |
621 | * associated with in this thermal zone. | |
d2e4eb83 EV |
622 | * @cdev: pointer to struct thermal_cooling_device |
623 | * @upper: the Maximum cooling state for this trip point. | |
624 | * THERMAL_NO_LIMIT means no upper limit, | |
625 | * and the cooling device can be in max_state. | |
626 | * @lower: the Minimum cooling state can be used for this trip point. | |
627 | * THERMAL_NO_LIMIT means no lower limit, | |
628 | * and the cooling device can be in cooling state 0. | |
6cd9e9f6 KS |
629 | * @weight: The weight of the cooling device to be bound to the |
630 | * thermal zone. Use THERMAL_WEIGHT_DEFAULT for the | |
631 | * default value | |
543a9561 | 632 | * |
d2e4eb83 EV |
633 | * This interface function bind a thermal cooling device to the certain trip |
634 | * point of a thermal zone device. | |
543a9561 | 635 | * This function is usually called in the thermal zone device .bind callback. |
d2e4eb83 EV |
636 | * |
637 | * Return: 0 on success, the proper error value otherwise. | |
203d3d4a ZR |
638 | */ |
639 | int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, | |
640 | int trip, | |
9d99842f | 641 | struct thermal_cooling_device *cdev, |
6cd9e9f6 KS |
642 | unsigned long upper, unsigned long lower, |
643 | unsigned int weight) | |
203d3d4a | 644 | { |
b81b6ba3 ZR |
645 | struct thermal_instance *dev; |
646 | struct thermal_instance *pos; | |
c7516709 TS |
647 | struct thermal_zone_device *pos1; |
648 | struct thermal_cooling_device *pos2; | |
74051ba5 | 649 | unsigned long max_state; |
9a3031dc | 650 | int result, ret; |
203d3d4a | 651 | |
543a9561 | 652 | if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE)) |
203d3d4a ZR |
653 | return -EINVAL; |
654 | ||
c7516709 TS |
655 | list_for_each_entry(pos1, &thermal_tz_list, node) { |
656 | if (pos1 == tz) | |
657 | break; | |
658 | } | |
659 | list_for_each_entry(pos2, &thermal_cdev_list, node) { | |
660 | if (pos2 == cdev) | |
661 | break; | |
662 | } | |
663 | ||
664 | if (tz != pos1 || cdev != pos2) | |
203d3d4a ZR |
665 | return -EINVAL; |
666 | ||
9a3031dc LM |
667 | ret = cdev->ops->get_max_state(cdev, &max_state); |
668 | if (ret) | |
669 | return ret; | |
9d99842f ZR |
670 | |
671 | /* lower default 0, upper default max_state */ | |
672 | lower = lower == THERMAL_NO_LIMIT ? 0 : lower; | |
673 | upper = upper == THERMAL_NO_LIMIT ? max_state : upper; | |
674 | ||
675 | if (lower > upper || upper > max_state) | |
676 | return -EINVAL; | |
677 | ||
203d3d4a | 678 | dev = |
b81b6ba3 | 679 | kzalloc(sizeof(struct thermal_instance), GFP_KERNEL); |
203d3d4a ZR |
680 | if (!dev) |
681 | return -ENOMEM; | |
682 | dev->tz = tz; | |
683 | dev->cdev = cdev; | |
684 | dev->trip = trip; | |
9d99842f ZR |
685 | dev->upper = upper; |
686 | dev->lower = lower; | |
ce119f83 | 687 | dev->target = THERMAL_NO_TARGET; |
6cd9e9f6 | 688 | dev->weight = weight; |
74051ba5 | 689 | |
203d3d4a ZR |
690 | result = get_idr(&tz->idr, &tz->lock, &dev->id); |
691 | if (result) | |
692 | goto free_mem; | |
693 | ||
694 | sprintf(dev->name, "cdev%d", dev->id); | |
695 | result = | |
696 | sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev->name); | |
697 | if (result) | |
698 | goto release_idr; | |
699 | ||
700 | sprintf(dev->attr_name, "cdev%d_trip_point", dev->id); | |
975f8c56 | 701 | sysfs_attr_init(&dev->attr.attr); |
203d3d4a ZR |
702 | dev->attr.attr.name = dev->attr_name; |
703 | dev->attr.attr.mode = 0444; | |
704 | dev->attr.show = thermal_cooling_device_trip_point_show; | |
705 | result = device_create_file(&tz->device, &dev->attr); | |
706 | if (result) | |
707 | goto remove_symbol_link; | |
708 | ||
db916513 JM |
709 | sprintf(dev->weight_attr_name, "cdev%d_weight", dev->id); |
710 | sysfs_attr_init(&dev->weight_attr.attr); | |
711 | dev->weight_attr.attr.name = dev->weight_attr_name; | |
712 | dev->weight_attr.attr.mode = S_IWUSR | S_IRUGO; | |
713 | dev->weight_attr.show = thermal_cooling_device_weight_show; | |
714 | dev->weight_attr.store = thermal_cooling_device_weight_store; | |
715 | result = device_create_file(&tz->device, &dev->weight_attr); | |
716 | if (result) | |
717 | goto remove_trip_file; | |
718 | ||
203d3d4a | 719 | mutex_lock(&tz->lock); |
f4a821ce | 720 | mutex_lock(&cdev->lock); |
cddf31b3 | 721 | list_for_each_entry(pos, &tz->thermal_instances, tz_node) |
203d3d4a ZR |
722 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
723 | result = -EEXIST; | |
724 | break; | |
725 | } | |
b5e4ae62 | 726 | if (!result) { |
cddf31b3 | 727 | list_add_tail(&dev->tz_node, &tz->thermal_instances); |
b5e4ae62 | 728 | list_add_tail(&dev->cdev_node, &cdev->thermal_instances); |
4511f716 | 729 | atomic_set(&tz->need_update, 1); |
b5e4ae62 | 730 | } |
f4a821ce | 731 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
732 | mutex_unlock(&tz->lock); |
733 | ||
734 | if (!result) | |
735 | return 0; | |
736 | ||
db916513 JM |
737 | device_remove_file(&tz->device, &dev->weight_attr); |
738 | remove_trip_file: | |
203d3d4a | 739 | device_remove_file(&tz->device, &dev->attr); |
caca8b80 | 740 | remove_symbol_link: |
203d3d4a | 741 | sysfs_remove_link(&tz->device.kobj, dev->name); |
caca8b80 | 742 | release_idr: |
203d3d4a | 743 | release_idr(&tz->idr, &tz->lock, dev->id); |
caca8b80 | 744 | free_mem: |
203d3d4a ZR |
745 | kfree(dev); |
746 | return result; | |
747 | } | |
910cb1e3 | 748 | EXPORT_SYMBOL_GPL(thermal_zone_bind_cooling_device); |
203d3d4a ZR |
749 | |
750 | /** | |
9892e5dc EV |
751 | * thermal_zone_unbind_cooling_device() - unbind a cooling device from a |
752 | * thermal zone. | |
753 | * @tz: pointer to a struct thermal_zone_device. | |
203d3d4a ZR |
754 | * @trip: indicates which trip point the cooling devices is |
755 | * associated with in this thermal zone. | |
9892e5dc | 756 | * @cdev: pointer to a struct thermal_cooling_device. |
543a9561 | 757 | * |
9892e5dc EV |
758 | * This interface function unbind a thermal cooling device from the certain |
759 | * trip point of a thermal zone device. | |
543a9561 | 760 | * This function is usually called in the thermal zone device .unbind callback. |
9892e5dc EV |
761 | * |
762 | * Return: 0 on success, the proper error value otherwise. | |
203d3d4a ZR |
763 | */ |
764 | int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz, | |
765 | int trip, | |
766 | struct thermal_cooling_device *cdev) | |
767 | { | |
b81b6ba3 | 768 | struct thermal_instance *pos, *next; |
203d3d4a ZR |
769 | |
770 | mutex_lock(&tz->lock); | |
f4a821ce | 771 | mutex_lock(&cdev->lock); |
cddf31b3 | 772 | list_for_each_entry_safe(pos, next, &tz->thermal_instances, tz_node) { |
543a9561 | 773 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
cddf31b3 | 774 | list_del(&pos->tz_node); |
b5e4ae62 | 775 | list_del(&pos->cdev_node); |
f4a821ce | 776 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
777 | mutex_unlock(&tz->lock); |
778 | goto unbind; | |
779 | } | |
780 | } | |
f4a821ce | 781 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
782 | mutex_unlock(&tz->lock); |
783 | ||
784 | return -ENODEV; | |
785 | ||
caca8b80 | 786 | unbind: |
528464ea | 787 | device_remove_file(&tz->device, &pos->weight_attr); |
203d3d4a ZR |
788 | device_remove_file(&tz->device, &pos->attr); |
789 | sysfs_remove_link(&tz->device.kobj, pos->name); | |
790 | release_idr(&tz->idr, &tz->lock, pos->id); | |
791 | kfree(pos); | |
792 | return 0; | |
793 | } | |
910cb1e3 | 794 | EXPORT_SYMBOL_GPL(thermal_zone_unbind_cooling_device); |
203d3d4a ZR |
795 | |
796 | static void thermal_release(struct device *dev) | |
797 | { | |
798 | struct thermal_zone_device *tz; | |
799 | struct thermal_cooling_device *cdev; | |
800 | ||
caca8b80 JP |
801 | if (!strncmp(dev_name(dev), "thermal_zone", |
802 | sizeof("thermal_zone") - 1)) { | |
203d3d4a ZR |
803 | tz = to_thermal_zone(dev); |
804 | kfree(tz); | |
732e4c8d | 805 | } else if(!strncmp(dev_name(dev), "cooling_device", |
806 | sizeof("cooling_device") - 1)){ | |
203d3d4a ZR |
807 | cdev = to_cooling_device(dev); |
808 | kfree(cdev); | |
809 | } | |
810 | } | |
811 | ||
812 | static struct class thermal_class = { | |
813 | .name = "thermal", | |
814 | .dev_release = thermal_release, | |
815 | }; | |
816 | ||
4b0d3c2d EV |
817 | static inline |
818 | void print_bind_err_msg(struct thermal_zone_device *tz, | |
819 | struct thermal_cooling_device *cdev, int ret) | |
f502ab84 EV |
820 | { |
821 | dev_err(&tz->device, "binding zone %s with cdev %s failed:%d\n", | |
822 | tz->type, cdev->type, ret); | |
823 | } | |
824 | ||
825 | static void __bind(struct thermal_zone_device *tz, int mask, | |
826 | struct thermal_cooling_device *cdev, | |
827 | unsigned long *limits, | |
828 | unsigned int weight) | |
829 | { | |
830 | int i, ret; | |
831 | ||
832 | for (i = 0; i < tz->trips; i++) { | |
833 | if (mask & (1 << i)) { | |
834 | unsigned long upper, lower; | |
835 | ||
836 | upper = THERMAL_NO_LIMIT; | |
837 | lower = THERMAL_NO_LIMIT; | |
838 | if (limits) { | |
839 | lower = limits[i * 2]; | |
840 | upper = limits[i * 2 + 1]; | |
841 | } | |
842 | ret = thermal_zone_bind_cooling_device(tz, i, cdev, | |
843 | upper, lower, | |
844 | weight); | |
845 | if (ret) | |
846 | print_bind_err_msg(tz, cdev, ret); | |
847 | } | |
848 | } | |
849 | } | |
850 | ||
949aad83 EV |
851 | static void bind_cdev(struct thermal_cooling_device *cdev) |
852 | { | |
853 | int i, ret; | |
854 | const struct thermal_zone_params *tzp; | |
855 | struct thermal_zone_device *pos = NULL; | |
856 | ||
857 | mutex_lock(&thermal_list_lock); | |
858 | ||
859 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
860 | if (!pos->tzp && !pos->ops->bind) | |
861 | continue; | |
862 | ||
863 | if (pos->ops->bind) { | |
864 | ret = pos->ops->bind(pos, cdev); | |
865 | if (ret) | |
866 | print_bind_err_msg(pos, cdev, ret); | |
867 | continue; | |
868 | } | |
869 | ||
870 | tzp = pos->tzp; | |
871 | if (!tzp || !tzp->tbp) | |
872 | continue; | |
873 | ||
874 | for (i = 0; i < tzp->num_tbps; i++) { | |
875 | if (tzp->tbp[i].cdev || !tzp->tbp[i].match) | |
876 | continue; | |
877 | if (tzp->tbp[i].match(pos, cdev)) | |
878 | continue; | |
879 | tzp->tbp[i].cdev = cdev; | |
880 | __bind(pos, tzp->tbp[i].trip_mask, cdev, | |
881 | tzp->tbp[i].binding_limits, | |
882 | tzp->tbp[i].weight); | |
883 | } | |
884 | } | |
885 | ||
886 | mutex_unlock(&thermal_list_lock); | |
887 | } | |
888 | ||
203d3d4a | 889 | /** |
a116b5d4 EV |
890 | * __thermal_cooling_device_register() - register a new thermal cooling device |
891 | * @np: a pointer to a device tree node. | |
203d3d4a ZR |
892 | * @type: the thermal cooling device type. |
893 | * @devdata: device private data. | |
894 | * @ops: standard thermal cooling devices callbacks. | |
3a6eccb3 EV |
895 | * |
896 | * This interface function adds a new thermal cooling device (fan/processor/...) | |
897 | * to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself | |
898 | * to all the thermal zone devices registered at the same time. | |
a116b5d4 EV |
899 | * It also gives the opportunity to link the cooling device to a device tree |
900 | * node, so that it can be bound to a thermal zone created out of device tree. | |
3a6eccb3 EV |
901 | * |
902 | * Return: a pointer to the created struct thermal_cooling_device or an | |
903 | * ERR_PTR. Caller must check return value with IS_ERR*() helpers. | |
203d3d4a | 904 | */ |
a116b5d4 EV |
905 | static struct thermal_cooling_device * |
906 | __thermal_cooling_device_register(struct device_node *np, | |
907 | char *type, void *devdata, | |
908 | const struct thermal_cooling_device_ops *ops) | |
203d3d4a ZR |
909 | { |
910 | struct thermal_cooling_device *cdev; | |
4511f716 | 911 | struct thermal_zone_device *pos = NULL; |
203d3d4a ZR |
912 | int result; |
913 | ||
204dd1d3 | 914 | if (type && strlen(type) >= THERMAL_NAME_LENGTH) |
3e6fda5c | 915 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
916 | |
917 | if (!ops || !ops->get_max_state || !ops->get_cur_state || | |
543a9561 | 918 | !ops->set_cur_state) |
3e6fda5c | 919 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
920 | |
921 | cdev = kzalloc(sizeof(struct thermal_cooling_device), GFP_KERNEL); | |
922 | if (!cdev) | |
3e6fda5c | 923 | return ERR_PTR(-ENOMEM); |
203d3d4a ZR |
924 | |
925 | result = get_idr(&thermal_cdev_idr, &thermal_idr_lock, &cdev->id); | |
926 | if (result) { | |
927 | kfree(cdev); | |
3e6fda5c | 928 | return ERR_PTR(result); |
203d3d4a ZR |
929 | } |
930 | ||
c7a8b9d9 | 931 | strlcpy(cdev->type, type ? : "", sizeof(cdev->type)); |
f4a821ce | 932 | mutex_init(&cdev->lock); |
b5e4ae62 | 933 | INIT_LIST_HEAD(&cdev->thermal_instances); |
a116b5d4 | 934 | cdev->np = np; |
203d3d4a | 935 | cdev->ops = ops; |
5ca0cce5 | 936 | cdev->updated = false; |
203d3d4a | 937 | cdev->device.class = &thermal_class; |
45cf2ec9 | 938 | thermal_cooling_device_setup_sysfs(cdev); |
203d3d4a | 939 | cdev->devdata = devdata; |
354655ea | 940 | dev_set_name(&cdev->device, "cooling_device%d", cdev->id); |
203d3d4a ZR |
941 | result = device_register(&cdev->device); |
942 | if (result) { | |
943 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
944 | kfree(cdev); | |
3e6fda5c | 945 | return ERR_PTR(result); |
203d3d4a ZR |
946 | } |
947 | ||
7e8ee1e9 | 948 | /* Add 'this' new cdev to the global cdev list */ |
203d3d4a ZR |
949 | mutex_lock(&thermal_list_lock); |
950 | list_add(&cdev->node, &thermal_cdev_list); | |
203d3d4a ZR |
951 | mutex_unlock(&thermal_list_lock); |
952 | ||
7e8ee1e9 D |
953 | /* Update binding information for 'this' new cdev */ |
954 | bind_cdev(cdev); | |
955 | ||
4511f716 CY |
956 | mutex_lock(&thermal_list_lock); |
957 | list_for_each_entry(pos, &thermal_tz_list, node) | |
958 | if (atomic_cmpxchg(&pos->need_update, 1, 0)) | |
0e70f466 SP |
959 | thermal_zone_device_update(pos, |
960 | THERMAL_EVENT_UNSPECIFIED); | |
4511f716 CY |
961 | mutex_unlock(&thermal_list_lock); |
962 | ||
7e8ee1e9 | 963 | return cdev; |
203d3d4a | 964 | } |
a116b5d4 EV |
965 | |
966 | /** | |
967 | * thermal_cooling_device_register() - register a new thermal cooling device | |
968 | * @type: the thermal cooling device type. | |
969 | * @devdata: device private data. | |
970 | * @ops: standard thermal cooling devices callbacks. | |
971 | * | |
972 | * This interface function adds a new thermal cooling device (fan/processor/...) | |
973 | * to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself | |
974 | * to all the thermal zone devices registered at the same time. | |
975 | * | |
976 | * Return: a pointer to the created struct thermal_cooling_device or an | |
977 | * ERR_PTR. Caller must check return value with IS_ERR*() helpers. | |
978 | */ | |
979 | struct thermal_cooling_device * | |
980 | thermal_cooling_device_register(char *type, void *devdata, | |
981 | const struct thermal_cooling_device_ops *ops) | |
982 | { | |
983 | return __thermal_cooling_device_register(NULL, type, devdata, ops); | |
984 | } | |
910cb1e3 | 985 | EXPORT_SYMBOL_GPL(thermal_cooling_device_register); |
203d3d4a | 986 | |
a116b5d4 EV |
987 | /** |
988 | * thermal_of_cooling_device_register() - register an OF thermal cooling device | |
989 | * @np: a pointer to a device tree node. | |
990 | * @type: the thermal cooling device type. | |
991 | * @devdata: device private data. | |
992 | * @ops: standard thermal cooling devices callbacks. | |
993 | * | |
994 | * This function will register a cooling device with device tree node reference. | |
995 | * This interface function adds a new thermal cooling device (fan/processor/...) | |
996 | * to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself | |
997 | * to all the thermal zone devices registered at the same time. | |
998 | * | |
999 | * Return: a pointer to the created struct thermal_cooling_device or an | |
1000 | * ERR_PTR. Caller must check return value with IS_ERR*() helpers. | |
1001 | */ | |
1002 | struct thermal_cooling_device * | |
1003 | thermal_of_cooling_device_register(struct device_node *np, | |
1004 | char *type, void *devdata, | |
1005 | const struct thermal_cooling_device_ops *ops) | |
1006 | { | |
1007 | return __thermal_cooling_device_register(np, type, devdata, ops); | |
1008 | } | |
1009 | EXPORT_SYMBOL_GPL(thermal_of_cooling_device_register); | |
1010 | ||
f11997fa EV |
1011 | static void __unbind(struct thermal_zone_device *tz, int mask, |
1012 | struct thermal_cooling_device *cdev) | |
1013 | { | |
1014 | int i; | |
1015 | ||
1016 | for (i = 0; i < tz->trips; i++) | |
1017 | if (mask & (1 << i)) | |
1018 | thermal_zone_unbind_cooling_device(tz, i, cdev); | |
1019 | } | |
1020 | ||
203d3d4a ZR |
1021 | /** |
1022 | * thermal_cooling_device_unregister - removes the registered thermal cooling device | |
203d3d4a ZR |
1023 | * @cdev: the thermal cooling device to remove. |
1024 | * | |
1025 | * thermal_cooling_device_unregister() must be called when the device is no | |
1026 | * longer needed. | |
1027 | */ | |
7e8ee1e9 | 1028 | void thermal_cooling_device_unregister(struct thermal_cooling_device *cdev) |
203d3d4a | 1029 | { |
7e8ee1e9 D |
1030 | int i; |
1031 | const struct thermal_zone_params *tzp; | |
203d3d4a ZR |
1032 | struct thermal_zone_device *tz; |
1033 | struct thermal_cooling_device *pos = NULL; | |
1034 | ||
1035 | if (!cdev) | |
1036 | return; | |
1037 | ||
1038 | mutex_lock(&thermal_list_lock); | |
1039 | list_for_each_entry(pos, &thermal_cdev_list, node) | |
1040 | if (pos == cdev) | |
1041 | break; | |
1042 | if (pos != cdev) { | |
1043 | /* thermal cooling device not found */ | |
1044 | mutex_unlock(&thermal_list_lock); | |
1045 | return; | |
1046 | } | |
1047 | list_del(&cdev->node); | |
7e8ee1e9 D |
1048 | |
1049 | /* Unbind all thermal zones associated with 'this' cdev */ | |
203d3d4a | 1050 | list_for_each_entry(tz, &thermal_tz_list, node) { |
7e8ee1e9 D |
1051 | if (tz->ops->unbind) { |
1052 | tz->ops->unbind(tz, cdev); | |
1053 | continue; | |
1054 | } | |
1055 | ||
1056 | if (!tz->tzp || !tz->tzp->tbp) | |
203d3d4a | 1057 | continue; |
7e8ee1e9 D |
1058 | |
1059 | tzp = tz->tzp; | |
1060 | for (i = 0; i < tzp->num_tbps; i++) { | |
1061 | if (tzp->tbp[i].cdev == cdev) { | |
1062 | __unbind(tz, tzp->tbp[i].trip_mask, cdev); | |
1063 | tzp->tbp[i].cdev = NULL; | |
1064 | } | |
1065 | } | |
203d3d4a | 1066 | } |
7e8ee1e9 | 1067 | |
203d3d4a | 1068 | mutex_unlock(&thermal_list_lock); |
7e8ee1e9 | 1069 | |
203d3d4a ZR |
1070 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); |
1071 | device_unregister(&cdev->device); | |
1072 | return; | |
1073 | } | |
910cb1e3 | 1074 | EXPORT_SYMBOL_GPL(thermal_cooling_device_unregister); |
203d3d4a | 1075 | |
90f5b5bb EV |
1076 | static void bind_tz(struct thermal_zone_device *tz) |
1077 | { | |
1078 | int i, ret; | |
1079 | struct thermal_cooling_device *pos = NULL; | |
1080 | const struct thermal_zone_params *tzp = tz->tzp; | |
1081 | ||
1082 | if (!tzp && !tz->ops->bind) | |
1083 | return; | |
1084 | ||
1085 | mutex_lock(&thermal_list_lock); | |
1086 | ||
1087 | /* If there is ops->bind, try to use ops->bind */ | |
1088 | if (tz->ops->bind) { | |
1089 | list_for_each_entry(pos, &thermal_cdev_list, node) { | |
1090 | ret = tz->ops->bind(tz, pos); | |
1091 | if (ret) | |
1092 | print_bind_err_msg(tz, pos, ret); | |
1093 | } | |
1094 | goto exit; | |
1095 | } | |
1096 | ||
1097 | if (!tzp || !tzp->tbp) | |
1098 | goto exit; | |
1099 | ||
1100 | list_for_each_entry(pos, &thermal_cdev_list, node) { | |
1101 | for (i = 0; i < tzp->num_tbps; i++) { | |
1102 | if (tzp->tbp[i].cdev || !tzp->tbp[i].match) | |
1103 | continue; | |
1104 | if (tzp->tbp[i].match(tz, pos)) | |
1105 | continue; | |
1106 | tzp->tbp[i].cdev = pos; | |
1107 | __bind(tz, tzp->tbp[i].trip_mask, pos, | |
1108 | tzp->tbp[i].binding_limits, | |
1109 | tzp->tbp[i].weight); | |
1110 | } | |
1111 | } | |
1112 | exit: | |
1113 | mutex_unlock(&thermal_list_lock); | |
1114 | } | |
1115 | ||
203d3d4a | 1116 | /** |
a00e55f9 | 1117 | * thermal_zone_device_register() - register a new thermal zone device |
203d3d4a ZR |
1118 | * @type: the thermal zone device type |
1119 | * @trips: the number of trip points the thermal zone support | |
c56f5c03 | 1120 | * @mask: a bit string indicating the writeablility of trip points |
203d3d4a ZR |
1121 | * @devdata: private device data |
1122 | * @ops: standard thermal zone device callbacks | |
50125a9b | 1123 | * @tzp: thermal zone platform parameters |
b1569e99 MG |
1124 | * @passive_delay: number of milliseconds to wait between polls when |
1125 | * performing passive cooling | |
1126 | * @polling_delay: number of milliseconds to wait between polls when checking | |
1127 | * whether trip points have been crossed (0 for interrupt | |
1128 | * driven systems) | |
203d3d4a | 1129 | * |
a00e55f9 EV |
1130 | * This interface function adds a new thermal zone device (sensor) to |
1131 | * /sys/class/thermal folder as thermal_zone[0-*]. It tries to bind all the | |
1132 | * thermal cooling devices registered at the same time. | |
203d3d4a | 1133 | * thermal_zone_device_unregister() must be called when the device is no |
1b7ddb84 | 1134 | * longer needed. The passive cooling depends on the .get_trend() return value. |
a00e55f9 EV |
1135 | * |
1136 | * Return: a pointer to the created struct thermal_zone_device or an | |
1137 | * in case of error, an ERR_PTR. Caller must check return value with | |
1138 | * IS_ERR*() helpers. | |
203d3d4a | 1139 | */ |
4b1bf587 | 1140 | struct thermal_zone_device *thermal_zone_device_register(const char *type, |
c56f5c03 | 1141 | int trips, int mask, void *devdata, |
4e5e4705 | 1142 | struct thermal_zone_device_ops *ops, |
6b775e87 | 1143 | struct thermal_zone_params *tzp, |
1b7ddb84 | 1144 | int passive_delay, int polling_delay) |
203d3d4a ZR |
1145 | { |
1146 | struct thermal_zone_device *tz; | |
03a971a2 | 1147 | enum thermal_trip_type trip_type; |
81ad4276 | 1148 | int trip_temp; |
203d3d4a ZR |
1149 | int result; |
1150 | int count; | |
e33df1d2 | 1151 | struct thermal_governor *governor; |
203d3d4a | 1152 | |
54fa38cc EV |
1153 | if (!type || strlen(type) == 0) |
1154 | return ERR_PTR(-EINVAL); | |
1155 | ||
204dd1d3 | 1156 | if (type && strlen(type) >= THERMAL_NAME_LENGTH) |
3e6fda5c | 1157 | return ERR_PTR(-EINVAL); |
203d3d4a | 1158 | |
c56f5c03 | 1159 | if (trips > THERMAL_MAX_TRIPS || trips < 0 || mask >> trips) |
3e6fda5c | 1160 | return ERR_PTR(-EINVAL); |
203d3d4a | 1161 | |
81bd4e1c | 1162 | if (!ops) |
3e6fda5c | 1163 | return ERR_PTR(-EINVAL); |
203d3d4a | 1164 | |
83720d0b | 1165 | if (trips > 0 && (!ops->get_trip_type || !ops->get_trip_temp)) |
6b2aa51d EV |
1166 | return ERR_PTR(-EINVAL); |
1167 | ||
203d3d4a ZR |
1168 | tz = kzalloc(sizeof(struct thermal_zone_device), GFP_KERNEL); |
1169 | if (!tz) | |
3e6fda5c | 1170 | return ERR_PTR(-ENOMEM); |
203d3d4a | 1171 | |
2d374139 | 1172 | INIT_LIST_HEAD(&tz->thermal_instances); |
203d3d4a ZR |
1173 | idr_init(&tz->idr); |
1174 | mutex_init(&tz->lock); | |
1175 | result = get_idr(&thermal_tz_idr, &thermal_idr_lock, &tz->id); | |
1176 | if (result) { | |
1177 | kfree(tz); | |
3e6fda5c | 1178 | return ERR_PTR(result); |
203d3d4a ZR |
1179 | } |
1180 | ||
54fa38cc | 1181 | strlcpy(tz->type, type, sizeof(tz->type)); |
203d3d4a | 1182 | tz->ops = ops; |
50125a9b | 1183 | tz->tzp = tzp; |
203d3d4a ZR |
1184 | tz->device.class = &thermal_class; |
1185 | tz->devdata = devdata; | |
1186 | tz->trips = trips; | |
b1569e99 MG |
1187 | tz->passive_delay = passive_delay; |
1188 | tz->polling_delay = polling_delay; | |
1c600861 | 1189 | |
4d0fe749 | 1190 | /* sys I/F */ |
1c600861 | 1191 | /* Add nodes that are always present via .groups */ |
4d0fe749 EV |
1192 | result = thermal_zone_create_device_groups(tz, mask); |
1193 | if (result) | |
1194 | goto unregister; | |
1195 | ||
4511f716 CY |
1196 | /* A new thermal zone needs to be updated anyway. */ |
1197 | atomic_set(&tz->need_update, 1); | |
b1569e99 | 1198 | |
354655ea | 1199 | dev_set_name(&tz->device, "thermal_zone%d", tz->id); |
203d3d4a ZR |
1200 | result = device_register(&tz->device); |
1201 | if (result) { | |
1202 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); | |
1203 | kfree(tz); | |
3e6fda5c | 1204 | return ERR_PTR(result); |
203d3d4a ZR |
1205 | } |
1206 | ||
203d3d4a | 1207 | for (count = 0; count < trips; count++) { |
81ad4276 ZR |
1208 | if (tz->ops->get_trip_type(tz, count, &trip_type)) |
1209 | set_bit(count, &tz->trips_disabled); | |
81ad4276 ZR |
1210 | if (tz->ops->get_trip_temp(tz, count, &trip_temp)) |
1211 | set_bit(count, &tz->trips_disabled); | |
1212 | /* Check for bogus trip points */ | |
1213 | if (trip_temp == 0) | |
1214 | set_bit(count, &tz->trips_disabled); | |
203d3d4a ZR |
1215 | } |
1216 | ||
a4a15485 D |
1217 | /* Update 'this' zone's governor information */ |
1218 | mutex_lock(&thermal_governor_lock); | |
1219 | ||
1220 | if (tz->tzp) | |
e33df1d2 | 1221 | governor = __find_governor(tz->tzp->governor_name); |
a4a15485 | 1222 | else |
e33df1d2 JM |
1223 | governor = def_governor; |
1224 | ||
1225 | result = thermal_set_governor(tz, governor); | |
1226 | if (result) { | |
1227 | mutex_unlock(&thermal_governor_lock); | |
1228 | goto unregister; | |
1229 | } | |
a4a15485 D |
1230 | |
1231 | mutex_unlock(&thermal_governor_lock); | |
1232 | ||
ccba4ffd EV |
1233 | if (!tz->tzp || !tz->tzp->no_hwmon) { |
1234 | result = thermal_add_hwmon_sysfs(tz); | |
1235 | if (result) | |
1236 | goto unregister; | |
1237 | } | |
e68b16ab | 1238 | |
203d3d4a ZR |
1239 | mutex_lock(&thermal_list_lock); |
1240 | list_add_tail(&tz->node, &thermal_tz_list); | |
203d3d4a ZR |
1241 | mutex_unlock(&thermal_list_lock); |
1242 | ||
7e8ee1e9 D |
1243 | /* Bind cooling devices for this zone */ |
1244 | bind_tz(tz); | |
1245 | ||
b1569e99 MG |
1246 | INIT_DELAYED_WORK(&(tz->poll_queue), thermal_zone_device_check); |
1247 | ||
bb431ba2 | 1248 | thermal_zone_device_reset(tz); |
4511f716 CY |
1249 | /* Update the new thermal zone and mark it as already updated. */ |
1250 | if (atomic_cmpxchg(&tz->need_update, 1, 0)) | |
0e70f466 | 1251 | thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED); |
b1569e99 | 1252 | |
14015860 | 1253 | return tz; |
203d3d4a | 1254 | |
caca8b80 | 1255 | unregister: |
203d3d4a ZR |
1256 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1257 | device_unregister(&tz->device); | |
3e6fda5c | 1258 | return ERR_PTR(result); |
203d3d4a | 1259 | } |
910cb1e3 | 1260 | EXPORT_SYMBOL_GPL(thermal_zone_device_register); |
203d3d4a ZR |
1261 | |
1262 | /** | |
1263 | * thermal_device_unregister - removes the registered thermal zone device | |
203d3d4a ZR |
1264 | * @tz: the thermal zone device to remove |
1265 | */ | |
1266 | void thermal_zone_device_unregister(struct thermal_zone_device *tz) | |
1267 | { | |
7e8ee1e9 D |
1268 | int i; |
1269 | const struct thermal_zone_params *tzp; | |
203d3d4a ZR |
1270 | struct thermal_cooling_device *cdev; |
1271 | struct thermal_zone_device *pos = NULL; | |
203d3d4a ZR |
1272 | |
1273 | if (!tz) | |
1274 | return; | |
1275 | ||
7e8ee1e9 D |
1276 | tzp = tz->tzp; |
1277 | ||
203d3d4a ZR |
1278 | mutex_lock(&thermal_list_lock); |
1279 | list_for_each_entry(pos, &thermal_tz_list, node) | |
1280 | if (pos == tz) | |
1281 | break; | |
1282 | if (pos != tz) { | |
1283 | /* thermal zone device not found */ | |
1284 | mutex_unlock(&thermal_list_lock); | |
1285 | return; | |
1286 | } | |
1287 | list_del(&tz->node); | |
7e8ee1e9 D |
1288 | |
1289 | /* Unbind all cdevs associated with 'this' thermal zone */ | |
1290 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
1291 | if (tz->ops->unbind) { | |
1292 | tz->ops->unbind(tz, cdev); | |
1293 | continue; | |
1294 | } | |
1295 | ||
1296 | if (!tzp || !tzp->tbp) | |
1297 | break; | |
1298 | ||
1299 | for (i = 0; i < tzp->num_tbps; i++) { | |
1300 | if (tzp->tbp[i].cdev == cdev) { | |
1301 | __unbind(tz, tzp->tbp[i].trip_mask, cdev); | |
1302 | tzp->tbp[i].cdev = NULL; | |
1303 | } | |
1304 | } | |
1305 | } | |
1306 | ||
203d3d4a ZR |
1307 | mutex_unlock(&thermal_list_lock); |
1308 | ||
b1569e99 MG |
1309 | thermal_zone_device_set_polling(tz, 0); |
1310 | ||
4d0fe749 EV |
1311 | kfree(tz->trip_type_attrs); |
1312 | kfree(tz->trip_temp_attrs); | |
1313 | kfree(tz->trip_hyst_attrs); | |
1314 | kfree(tz->trips_attribute_group.attrs); | |
e33df1d2 | 1315 | thermal_set_governor(tz, NULL); |
203d3d4a | 1316 | |
e68b16ab | 1317 | thermal_remove_hwmon_sysfs(tz); |
203d3d4a ZR |
1318 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1319 | idr_destroy(&tz->idr); | |
1320 | mutex_destroy(&tz->lock); | |
1321 | device_unregister(&tz->device); | |
e161aefb | 1322 | kfree(tz->device.groups); |
203d3d4a | 1323 | } |
910cb1e3 | 1324 | EXPORT_SYMBOL_GPL(thermal_zone_device_unregister); |
203d3d4a | 1325 | |
63c4d919 EV |
1326 | /** |
1327 | * thermal_zone_get_zone_by_name() - search for a zone and returns its ref | |
1328 | * @name: thermal zone name to fetch the temperature | |
1329 | * | |
1330 | * When only one zone is found with the passed name, returns a reference to it. | |
1331 | * | |
1332 | * Return: On success returns a reference to an unique thermal zone with | |
1333 | * matching name equals to @name, an ERR_PTR otherwise (-EINVAL for invalid | |
1334 | * paramenters, -ENODEV for not found and -EEXIST for multiple matches). | |
1335 | */ | |
1336 | struct thermal_zone_device *thermal_zone_get_zone_by_name(const char *name) | |
1337 | { | |
1338 | struct thermal_zone_device *pos = NULL, *ref = ERR_PTR(-EINVAL); | |
1339 | unsigned int found = 0; | |
1340 | ||
1341 | if (!name) | |
1342 | goto exit; | |
1343 | ||
1344 | mutex_lock(&thermal_list_lock); | |
1345 | list_for_each_entry(pos, &thermal_tz_list, node) | |
484ac2f3 | 1346 | if (!strncasecmp(name, pos->type, THERMAL_NAME_LENGTH)) { |
63c4d919 EV |
1347 | found++; |
1348 | ref = pos; | |
1349 | } | |
1350 | mutex_unlock(&thermal_list_lock); | |
1351 | ||
1352 | /* nothing has been found, thus an error code for it */ | |
1353 | if (found == 0) | |
1354 | ref = ERR_PTR(-ENODEV); | |
1355 | else if (found > 1) | |
1356 | /* Success only when an unique zone is found */ | |
1357 | ref = ERR_PTR(-EEXIST); | |
1358 | ||
1359 | exit: | |
1360 | return ref; | |
1361 | } | |
1362 | EXPORT_SYMBOL_GPL(thermal_zone_get_zone_by_name); | |
1363 | ||
4a7069a3 RN |
1364 | /** |
1365 | * thermal_zone_get_slope - return the slope attribute of the thermal zone | |
1366 | * @tz: thermal zone device with the slope attribute | |
1367 | * | |
1368 | * Return: If the thermal zone device has a slope attribute, return it, else | |
1369 | * return 1. | |
1370 | */ | |
1371 | int thermal_zone_get_slope(struct thermal_zone_device *tz) | |
1372 | { | |
1373 | if (tz && tz->tzp) | |
1374 | return tz->tzp->slope; | |
1375 | return 1; | |
1376 | } | |
1377 | EXPORT_SYMBOL_GPL(thermal_zone_get_slope); | |
1378 | ||
1379 | /** | |
1380 | * thermal_zone_get_offset - return the offset attribute of the thermal zone | |
1381 | * @tz: thermal zone device with the offset attribute | |
1382 | * | |
1383 | * Return: If the thermal zone device has a offset attribute, return it, else | |
1384 | * return 0. | |
1385 | */ | |
1386 | int thermal_zone_get_offset(struct thermal_zone_device *tz) | |
1387 | { | |
1388 | if (tz && tz->tzp) | |
1389 | return tz->tzp->offset; | |
1390 | return 0; | |
1391 | } | |
1392 | EXPORT_SYMBOL_GPL(thermal_zone_get_offset); | |
1393 | ||
af06216a | 1394 | #ifdef CONFIG_NET |
2a94fe48 JB |
1395 | static const struct genl_multicast_group thermal_event_mcgrps[] = { |
1396 | { .name = THERMAL_GENL_MCAST_GROUP_NAME, }, | |
1397 | }; | |
1398 | ||
af06216a RW |
1399 | static struct genl_family thermal_event_genl_family = { |
1400 | .id = GENL_ID_GENERATE, | |
1401 | .name = THERMAL_GENL_FAMILY_NAME, | |
1402 | .version = THERMAL_GENL_VERSION, | |
1403 | .maxattr = THERMAL_GENL_ATTR_MAX, | |
2a94fe48 JB |
1404 | .mcgrps = thermal_event_mcgrps, |
1405 | .n_mcgrps = ARRAY_SIZE(thermal_event_mcgrps), | |
af06216a RW |
1406 | }; |
1407 | ||
8ab3e6a0 EV |
1408 | int thermal_generate_netlink_event(struct thermal_zone_device *tz, |
1409 | enum events event) | |
4cb18728 D |
1410 | { |
1411 | struct sk_buff *skb; | |
1412 | struct nlattr *attr; | |
1413 | struct thermal_genl_event *thermal_event; | |
1414 | void *msg_header; | |
1415 | int size; | |
1416 | int result; | |
b11de07c | 1417 | static unsigned int thermal_event_seqnum; |
4cb18728 | 1418 | |
8ab3e6a0 EV |
1419 | if (!tz) |
1420 | return -EINVAL; | |
1421 | ||
4cb18728 | 1422 | /* allocate memory */ |
886ee546 JP |
1423 | size = nla_total_size(sizeof(struct thermal_genl_event)) + |
1424 | nla_total_size(0); | |
4cb18728 D |
1425 | |
1426 | skb = genlmsg_new(size, GFP_ATOMIC); | |
1427 | if (!skb) | |
1428 | return -ENOMEM; | |
1429 | ||
1430 | /* add the genetlink message header */ | |
1431 | msg_header = genlmsg_put(skb, 0, thermal_event_seqnum++, | |
1432 | &thermal_event_genl_family, 0, | |
1433 | THERMAL_GENL_CMD_EVENT); | |
1434 | if (!msg_header) { | |
1435 | nlmsg_free(skb); | |
1436 | return -ENOMEM; | |
1437 | } | |
1438 | ||
1439 | /* fill the data */ | |
886ee546 JP |
1440 | attr = nla_reserve(skb, THERMAL_GENL_ATTR_EVENT, |
1441 | sizeof(struct thermal_genl_event)); | |
4cb18728 D |
1442 | |
1443 | if (!attr) { | |
1444 | nlmsg_free(skb); | |
1445 | return -EINVAL; | |
1446 | } | |
1447 | ||
1448 | thermal_event = nla_data(attr); | |
1449 | if (!thermal_event) { | |
1450 | nlmsg_free(skb); | |
1451 | return -EINVAL; | |
1452 | } | |
1453 | ||
1454 | memset(thermal_event, 0, sizeof(struct thermal_genl_event)); | |
1455 | ||
8ab3e6a0 | 1456 | thermal_event->orig = tz->id; |
4cb18728 D |
1457 | thermal_event->event = event; |
1458 | ||
1459 | /* send multicast genetlink message */ | |
053c095a | 1460 | genlmsg_end(skb, msg_header); |
4cb18728 | 1461 | |
68eb5503 | 1462 | result = genlmsg_multicast(&thermal_event_genl_family, skb, 0, |
2a94fe48 | 1463 | 0, GFP_ATOMIC); |
4cb18728 | 1464 | if (result) |
923e0b1e | 1465 | dev_err(&tz->device, "Failed to send netlink event:%d", result); |
4cb18728 D |
1466 | |
1467 | return result; | |
1468 | } | |
910cb1e3 | 1469 | EXPORT_SYMBOL_GPL(thermal_generate_netlink_event); |
4cb18728 D |
1470 | |
1471 | static int genetlink_init(void) | |
1472 | { | |
2a94fe48 | 1473 | return genl_register_family(&thermal_event_genl_family); |
4cb18728 D |
1474 | } |
1475 | ||
af06216a RW |
1476 | static void genetlink_exit(void) |
1477 | { | |
1478 | genl_unregister_family(&thermal_event_genl_family); | |
1479 | } | |
1480 | #else /* !CONFIG_NET */ | |
1481 | static inline int genetlink_init(void) { return 0; } | |
1482 | static inline void genetlink_exit(void) {} | |
1483 | #endif /* !CONFIG_NET */ | |
1484 | ||
ff140fea ZR |
1485 | static int thermal_pm_notify(struct notifier_block *nb, |
1486 | unsigned long mode, void *_unused) | |
1487 | { | |
1488 | struct thermal_zone_device *tz; | |
1489 | ||
1490 | switch (mode) { | |
1491 | case PM_HIBERNATION_PREPARE: | |
1492 | case PM_RESTORE_PREPARE: | |
1493 | case PM_SUSPEND_PREPARE: | |
1494 | atomic_set(&in_suspend, 1); | |
1495 | break; | |
1496 | case PM_POST_HIBERNATION: | |
1497 | case PM_POST_RESTORE: | |
1498 | case PM_POST_SUSPEND: | |
1499 | atomic_set(&in_suspend, 0); | |
1500 | list_for_each_entry(tz, &thermal_tz_list, node) { | |
1501 | thermal_zone_device_reset(tz); | |
0e70f466 SP |
1502 | thermal_zone_device_update(tz, |
1503 | THERMAL_EVENT_UNSPECIFIED); | |
ff140fea ZR |
1504 | } |
1505 | break; | |
1506 | default: | |
1507 | break; | |
1508 | } | |
1509 | return 0; | |
1510 | } | |
1511 | ||
1512 | static struct notifier_block thermal_pm_nb = { | |
1513 | .notifier_call = thermal_pm_notify, | |
1514 | }; | |
1515 | ||
203d3d4a ZR |
1516 | static int __init thermal_init(void) |
1517 | { | |
80a26a5c ZR |
1518 | int result; |
1519 | ||
1520 | result = thermal_register_governors(); | |
1521 | if (result) | |
1522 | goto error; | |
203d3d4a ZR |
1523 | |
1524 | result = class_register(&thermal_class); | |
80a26a5c ZR |
1525 | if (result) |
1526 | goto unregister_governors; | |
1527 | ||
4cb18728 | 1528 | result = genetlink_init(); |
80a26a5c ZR |
1529 | if (result) |
1530 | goto unregister_class; | |
1531 | ||
4e5e4705 EV |
1532 | result = of_parse_thermal_zones(); |
1533 | if (result) | |
1534 | goto exit_netlink; | |
1535 | ||
ff140fea ZR |
1536 | result = register_pm_notifier(&thermal_pm_nb); |
1537 | if (result) | |
1538 | pr_warn("Thermal: Can not register suspend notifier, return %d\n", | |
1539 | result); | |
1540 | ||
80a26a5c ZR |
1541 | return 0; |
1542 | ||
4e5e4705 EV |
1543 | exit_netlink: |
1544 | genetlink_exit(); | |
80a26a5c ZR |
1545 | unregister_class: |
1546 | class_unregister(&thermal_class); | |
9d367e5e LH |
1547 | unregister_governors: |
1548 | thermal_unregister_governors(); | |
80a26a5c ZR |
1549 | error: |
1550 | idr_destroy(&thermal_tz_idr); | |
1551 | idr_destroy(&thermal_cdev_idr); | |
1552 | mutex_destroy(&thermal_idr_lock); | |
1553 | mutex_destroy(&thermal_list_lock); | |
1554 | mutex_destroy(&thermal_governor_lock); | |
203d3d4a ZR |
1555 | return result; |
1556 | } | |
1557 | ||
1558 | static void __exit thermal_exit(void) | |
1559 | { | |
ff140fea | 1560 | unregister_pm_notifier(&thermal_pm_nb); |
4e5e4705 | 1561 | of_thermal_destroy_zones(); |
80a26a5c | 1562 | genetlink_exit(); |
203d3d4a | 1563 | class_unregister(&thermal_class); |
80a26a5c | 1564 | thermal_unregister_governors(); |
203d3d4a ZR |
1565 | idr_destroy(&thermal_tz_idr); |
1566 | idr_destroy(&thermal_cdev_idr); | |
1567 | mutex_destroy(&thermal_idr_lock); | |
1568 | mutex_destroy(&thermal_list_lock); | |
80a26a5c | 1569 | mutex_destroy(&thermal_governor_lock); |
203d3d4a ZR |
1570 | } |
1571 | ||
4cb18728 | 1572 | fs_initcall(thermal_init); |
203d3d4a | 1573 | module_exit(thermal_exit); |