Commit | Line | Data |
---|---|---|
203d3d4a ZR |
1 | /* |
2 | * thermal.c - Generic Thermal Management Sysfs support. | |
3 | * | |
4 | * Copyright (C) 2008 Intel Corp | |
5 | * Copyright (C) 2008 Zhang Rui <rui.zhang@intel.com> | |
6 | * Copyright (C) 2008 Sujith Thomas <sujith.thomas@intel.com> | |
7 | * | |
203d3d4a ZR |
8 | * This program is free software; you can redistribute it and/or modify |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; version 2 of the License. | |
203d3d4a ZR |
11 | */ |
12 | ||
c5a01dd5 JP |
13 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
14 | ||
203d3d4a ZR |
15 | #include <linux/module.h> |
16 | #include <linux/device.h> | |
17 | #include <linux/err.h> | |
5a0e3ad6 | 18 | #include <linux/slab.h> |
203d3d4a ZR |
19 | #include <linux/kdev_t.h> |
20 | #include <linux/idr.h> | |
21 | #include <linux/thermal.h> | |
b1569e99 | 22 | #include <linux/reboot.h> |
42a5bf50 | 23 | #include <linux/string.h> |
a116b5d4 | 24 | #include <linux/of.h> |
4cb18728 D |
25 | #include <net/netlink.h> |
26 | #include <net/genetlink.h> | |
ff140fea | 27 | #include <linux/suspend.h> |
203d3d4a | 28 | |
100a8fdb PA |
29 | #define CREATE_TRACE_POINTS |
30 | #include <trace/events/thermal.h> | |
31 | ||
71350db4 | 32 | #include "thermal_core.h" |
0dd88793 | 33 | #include "thermal_hwmon.h" |
71350db4 | 34 | |
63c4ec90 | 35 | MODULE_AUTHOR("Zhang Rui"); |
203d3d4a | 36 | MODULE_DESCRIPTION("Generic thermal management sysfs support"); |
6d8d4974 | 37 | MODULE_LICENSE("GPL v2"); |
203d3d4a | 38 | |
b31ef828 MW |
39 | static DEFINE_IDA(thermal_tz_ida); |
40 | static DEFINE_IDA(thermal_cdev_ida); | |
203d3d4a ZR |
41 | |
42 | static LIST_HEAD(thermal_tz_list); | |
43 | static LIST_HEAD(thermal_cdev_list); | |
a4a15485 D |
44 | static LIST_HEAD(thermal_governor_list); |
45 | ||
203d3d4a | 46 | static DEFINE_MUTEX(thermal_list_lock); |
a4a15485 D |
47 | static DEFINE_MUTEX(thermal_governor_lock); |
48 | ||
ff140fea ZR |
49 | static atomic_t in_suspend; |
50 | ||
f2234bcd ZR |
51 | static struct thermal_governor *def_governor; |
52 | ||
1b4f4849 EV |
53 | /* |
54 | * Governor section: set of functions to handle thermal governors | |
55 | * | |
56 | * Functions to help in the life cycle of thermal governors within | |
57 | * the thermal core and by the thermal governor code. | |
58 | */ | |
59 | ||
a4a15485 D |
60 | static struct thermal_governor *__find_governor(const char *name) |
61 | { | |
62 | struct thermal_governor *pos; | |
63 | ||
f2234bcd ZR |
64 | if (!name || !name[0]) |
65 | return def_governor; | |
66 | ||
a4a15485 | 67 | list_for_each_entry(pos, &thermal_governor_list, governor_list) |
484ac2f3 | 68 | if (!strncasecmp(name, pos->name, THERMAL_NAME_LENGTH)) |
a4a15485 D |
69 | return pos; |
70 | ||
71 | return NULL; | |
72 | } | |
73 | ||
e33df1d2 JM |
74 | /** |
75 | * bind_previous_governor() - bind the previous governor of the thermal zone | |
76 | * @tz: a valid pointer to a struct thermal_zone_device | |
77 | * @failed_gov_name: the name of the governor that failed to register | |
78 | * | |
79 | * Register the previous governor of the thermal zone after a new | |
80 | * governor has failed to be bound. | |
81 | */ | |
82 | static void bind_previous_governor(struct thermal_zone_device *tz, | |
83 | const char *failed_gov_name) | |
84 | { | |
85 | if (tz->governor && tz->governor->bind_to_tz) { | |
86 | if (tz->governor->bind_to_tz(tz)) { | |
87 | dev_err(&tz->device, | |
88 | "governor %s failed to bind and the previous one (%s) failed to bind again, thermal zone %s has no governor\n", | |
89 | failed_gov_name, tz->governor->name, tz->type); | |
90 | tz->governor = NULL; | |
91 | } | |
92 | } | |
93 | } | |
94 | ||
95 | /** | |
96 | * thermal_set_governor() - Switch to another governor | |
97 | * @tz: a valid pointer to a struct thermal_zone_device | |
98 | * @new_gov: pointer to the new governor | |
99 | * | |
100 | * Change the governor of thermal zone @tz. | |
101 | * | |
102 | * Return: 0 on success, an error if the new governor's bind_to_tz() failed. | |
103 | */ | |
104 | static int thermal_set_governor(struct thermal_zone_device *tz, | |
105 | struct thermal_governor *new_gov) | |
106 | { | |
107 | int ret = 0; | |
108 | ||
109 | if (tz->governor && tz->governor->unbind_from_tz) | |
110 | tz->governor->unbind_from_tz(tz); | |
111 | ||
112 | if (new_gov && new_gov->bind_to_tz) { | |
113 | ret = new_gov->bind_to_tz(tz); | |
114 | if (ret) { | |
115 | bind_previous_governor(tz, new_gov->name); | |
116 | ||
117 | return ret; | |
118 | } | |
119 | } | |
120 | ||
121 | tz->governor = new_gov; | |
122 | ||
123 | return ret; | |
124 | } | |
125 | ||
a4a15485 D |
126 | int thermal_register_governor(struct thermal_governor *governor) |
127 | { | |
128 | int err; | |
129 | const char *name; | |
130 | struct thermal_zone_device *pos; | |
131 | ||
132 | if (!governor) | |
133 | return -EINVAL; | |
134 | ||
135 | mutex_lock(&thermal_governor_lock); | |
136 | ||
137 | err = -EBUSY; | |
5027ba36 | 138 | if (!__find_governor(governor->name)) { |
eb7be329 EV |
139 | bool match_default; |
140 | ||
a4a15485 D |
141 | err = 0; |
142 | list_add(&governor->governor_list, &thermal_governor_list); | |
eb7be329 EV |
143 | match_default = !strncmp(governor->name, |
144 | DEFAULT_THERMAL_GOVERNOR, | |
145 | THERMAL_NAME_LENGTH); | |
146 | ||
147 | if (!def_governor && match_default) | |
f2234bcd | 148 | def_governor = governor; |
a4a15485 D |
149 | } |
150 | ||
151 | mutex_lock(&thermal_list_lock); | |
152 | ||
153 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
f2234bcd ZR |
154 | /* |
155 | * only thermal zones with specified tz->tzp->governor_name | |
156 | * may run with tz->govenor unset | |
157 | */ | |
a4a15485 D |
158 | if (pos->governor) |
159 | continue; | |
f2234bcd ZR |
160 | |
161 | name = pos->tzp->governor_name; | |
162 | ||
e33df1d2 JM |
163 | if (!strncasecmp(name, governor->name, THERMAL_NAME_LENGTH)) { |
164 | int ret; | |
165 | ||
166 | ret = thermal_set_governor(pos, governor); | |
167 | if (ret) | |
168 | dev_err(&pos->device, | |
169 | "Failed to set governor %s for thermal zone %s: %d\n", | |
170 | governor->name, pos->type, ret); | |
171 | } | |
a4a15485 D |
172 | } |
173 | ||
174 | mutex_unlock(&thermal_list_lock); | |
175 | mutex_unlock(&thermal_governor_lock); | |
176 | ||
177 | return err; | |
178 | } | |
a4a15485 D |
179 | |
180 | void thermal_unregister_governor(struct thermal_governor *governor) | |
181 | { | |
182 | struct thermal_zone_device *pos; | |
183 | ||
184 | if (!governor) | |
185 | return; | |
186 | ||
187 | mutex_lock(&thermal_governor_lock); | |
188 | ||
5027ba36 | 189 | if (!__find_governor(governor->name)) |
a4a15485 D |
190 | goto exit; |
191 | ||
192 | mutex_lock(&thermal_list_lock); | |
193 | ||
194 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
484ac2f3 | 195 | if (!strncasecmp(pos->governor->name, governor->name, |
eb7be329 | 196 | THERMAL_NAME_LENGTH)) |
e33df1d2 | 197 | thermal_set_governor(pos, NULL); |
a4a15485 D |
198 | } |
199 | ||
200 | mutex_unlock(&thermal_list_lock); | |
201 | list_del(&governor->governor_list); | |
202 | exit: | |
203 | mutex_unlock(&thermal_governor_lock); | |
9b4298a0 | 204 | } |
9b4298a0 | 205 | |
1b4f4849 EV |
206 | int thermal_zone_device_set_policy(struct thermal_zone_device *tz, |
207 | char *policy) | |
9b4298a0 | 208 | { |
1b4f4849 EV |
209 | struct thermal_governor *gov; |
210 | int ret = -EINVAL; | |
9b4298a0 | 211 | |
1b4f4849 | 212 | mutex_lock(&thermal_governor_lock); |
9b4298a0 | 213 | mutex_lock(&tz->lock); |
9b4298a0 | 214 | |
1b4f4849 EV |
215 | gov = __find_governor(strim(policy)); |
216 | if (!gov) | |
217 | goto exit; | |
9b4298a0 | 218 | |
1b4f4849 | 219 | ret = thermal_set_governor(tz, gov); |
9b4298a0 | 220 | |
1b4f4849 EV |
221 | exit: |
222 | mutex_unlock(&tz->lock); | |
223 | mutex_unlock(&thermal_governor_lock); | |
9b4298a0 | 224 | |
1b4f4849 | 225 | return ret; |
7e8ee1e9 D |
226 | } |
227 | ||
1b4f4849 | 228 | int thermal_build_list_of_policies(char *buf) |
7e8ee1e9 | 229 | { |
1b4f4849 EV |
230 | struct thermal_governor *pos; |
231 | ssize_t count = 0; | |
232 | ssize_t size = PAGE_SIZE; | |
7e8ee1e9 | 233 | |
1b4f4849 | 234 | mutex_lock(&thermal_governor_lock); |
a8892d83 | 235 | |
1b4f4849 EV |
236 | list_for_each_entry(pos, &thermal_governor_list, governor_list) { |
237 | size = PAGE_SIZE - count; | |
238 | count += scnprintf(buf + count, size, "%s ", pos->name); | |
7e8ee1e9 | 239 | } |
1b4f4849 | 240 | count += scnprintf(buf + count, size, "\n"); |
7e8ee1e9 | 241 | |
1b4f4849 | 242 | mutex_unlock(&thermal_governor_lock); |
7e8ee1e9 | 243 | |
1b4f4849 | 244 | return count; |
7e8ee1e9 D |
245 | } |
246 | ||
1b4f4849 | 247 | static int __init thermal_register_governors(void) |
7e8ee1e9 | 248 | { |
1b4f4849 | 249 | int result; |
7e8ee1e9 | 250 | |
1b4f4849 EV |
251 | result = thermal_gov_step_wise_register(); |
252 | if (result) | |
253 | return result; | |
7e8ee1e9 | 254 | |
1b4f4849 EV |
255 | result = thermal_gov_fair_share_register(); |
256 | if (result) | |
257 | return result; | |
7e8ee1e9 | 258 | |
1b4f4849 EV |
259 | result = thermal_gov_bang_bang_register(); |
260 | if (result) | |
261 | return result; | |
7e8ee1e9 | 262 | |
1b4f4849 EV |
263 | result = thermal_gov_user_space_register(); |
264 | if (result) | |
265 | return result; | |
7e8ee1e9 | 266 | |
1b4f4849 | 267 | return thermal_gov_power_allocator_register(); |
7e8ee1e9 D |
268 | } |
269 | ||
1b4f4849 | 270 | static void thermal_unregister_governors(void) |
7e8ee1e9 | 271 | { |
1b4f4849 EV |
272 | thermal_gov_step_wise_unregister(); |
273 | thermal_gov_fair_share_unregister(); | |
274 | thermal_gov_bang_bang_unregister(); | |
275 | thermal_gov_user_space_unregister(); | |
276 | thermal_gov_power_allocator_unregister(); | |
7e8ee1e9 D |
277 | } |
278 | ||
8772e185 EV |
279 | /* |
280 | * Zone update section: main control loop applied to each zone while monitoring | |
281 | * | |
282 | * in polling mode. The monitoring is done using a workqueue. | |
283 | * Same update may be done on a zone by calling thermal_zone_device_update(). | |
284 | * | |
285 | * An update means: | |
286 | * - Non-critical trips will invoke the governor responsible for that zone; | |
287 | * - Hot trips will produce a notification to userspace; | |
288 | * - Critical trip point will cause a system shutdown. | |
289 | */ | |
0c01ebbf D |
290 | static void thermal_zone_device_set_polling(struct thermal_zone_device *tz, |
291 | int delay) | |
292 | { | |
293 | if (delay > 1000) | |
294 | mod_delayed_work(system_freezable_wq, &tz->poll_queue, | |
295 | round_jiffies(msecs_to_jiffies(delay))); | |
296 | else if (delay) | |
297 | mod_delayed_work(system_freezable_wq, &tz->poll_queue, | |
298 | msecs_to_jiffies(delay)); | |
299 | else | |
300 | cancel_delayed_work(&tz->poll_queue); | |
301 | } | |
302 | ||
303 | static void monitor_thermal_zone(struct thermal_zone_device *tz) | |
304 | { | |
305 | mutex_lock(&tz->lock); | |
306 | ||
307 | if (tz->passive) | |
308 | thermal_zone_device_set_polling(tz, tz->passive_delay); | |
309 | else if (tz->polling_delay) | |
310 | thermal_zone_device_set_polling(tz, tz->polling_delay); | |
311 | else | |
312 | thermal_zone_device_set_polling(tz, 0); | |
313 | ||
314 | mutex_unlock(&tz->lock); | |
315 | } | |
316 | ||
317 | static void handle_non_critical_trips(struct thermal_zone_device *tz, | |
eb7be329 EV |
318 | int trip, |
319 | enum thermal_trip_type trip_type) | |
0c01ebbf | 320 | { |
f2234bcd ZR |
321 | tz->governor ? tz->governor->throttle(tz, trip) : |
322 | def_governor->throttle(tz, trip); | |
0c01ebbf D |
323 | } |
324 | ||
325 | static void handle_critical_trips(struct thermal_zone_device *tz, | |
eb7be329 | 326 | int trip, enum thermal_trip_type trip_type) |
0c01ebbf | 327 | { |
17e8351a | 328 | int trip_temp; |
0c01ebbf D |
329 | |
330 | tz->ops->get_trip_temp(tz, trip, &trip_temp); | |
331 | ||
332 | /* If we have not crossed the trip_temp, we do not care. */ | |
84ffe3ec | 333 | if (trip_temp <= 0 || tz->temperature < trip_temp) |
0c01ebbf D |
334 | return; |
335 | ||
208cd822 PA |
336 | trace_thermal_zone_trip(tz, trip, trip_type); |
337 | ||
0c01ebbf D |
338 | if (tz->ops->notify) |
339 | tz->ops->notify(tz, trip, trip_type); | |
340 | ||
341 | if (trip_type == THERMAL_TRIP_CRITICAL) { | |
923e0b1e EV |
342 | dev_emerg(&tz->device, |
343 | "critical temperature reached(%d C),shutting down\n", | |
344 | tz->temperature / 1000); | |
0c01ebbf D |
345 | orderly_poweroff(true); |
346 | } | |
347 | } | |
348 | ||
349 | static void handle_thermal_trip(struct thermal_zone_device *tz, int trip) | |
350 | { | |
351 | enum thermal_trip_type type; | |
352 | ||
81ad4276 ZR |
353 | /* Ignore disabled trip points */ |
354 | if (test_bit(trip, &tz->trips_disabled)) | |
355 | return; | |
356 | ||
0c01ebbf D |
357 | tz->ops->get_trip_type(tz, trip, &type); |
358 | ||
359 | if (type == THERMAL_TRIP_CRITICAL || type == THERMAL_TRIP_HOT) | |
360 | handle_critical_trips(tz, trip, type); | |
361 | else | |
362 | handle_non_critical_trips(tz, trip, type); | |
363 | /* | |
364 | * Alright, we handled this trip successfully. | |
365 | * So, start monitoring again. | |
366 | */ | |
367 | monitor_thermal_zone(tz); | |
368 | } | |
369 | ||
370 | static void update_temperature(struct thermal_zone_device *tz) | |
371 | { | |
17e8351a | 372 | int temp, ret; |
0c01ebbf | 373 | |
e6e238c3 | 374 | ret = thermal_zone_get_temp(tz, &temp); |
0c01ebbf | 375 | if (ret) { |
7e497a73 HG |
376 | if (ret != -EAGAIN) |
377 | dev_warn(&tz->device, | |
378 | "failed to read out thermal zone (%d)\n", | |
379 | ret); | |
e6e238c3 | 380 | return; |
0c01ebbf D |
381 | } |
382 | ||
e6e238c3 | 383 | mutex_lock(&tz->lock); |
0c01ebbf D |
384 | tz->last_temperature = tz->temperature; |
385 | tz->temperature = temp; | |
0c01ebbf | 386 | mutex_unlock(&tz->lock); |
06475b55 | 387 | |
100a8fdb | 388 | trace_thermal_temperature(tz); |
bb431ba2 ZR |
389 | if (tz->last_temperature == THERMAL_TEMP_INVALID) |
390 | dev_dbg(&tz->device, "last_temperature N/A, current_temperature=%d\n", | |
391 | tz->temperature); | |
392 | else | |
393 | dev_dbg(&tz->device, "last_temperature=%d, current_temperature=%d\n", | |
394 | tz->last_temperature, tz->temperature); | |
395 | } | |
396 | ||
397 | static void thermal_zone_device_reset(struct thermal_zone_device *tz) | |
398 | { | |
399 | struct thermal_instance *pos; | |
400 | ||
401 | tz->temperature = THERMAL_TEMP_INVALID; | |
402 | tz->passive = 0; | |
403 | list_for_each_entry(pos, &tz->thermal_instances, tz_node) | |
404 | pos->initialized = false; | |
0c01ebbf D |
405 | } |
406 | ||
0e70f466 SP |
407 | void thermal_zone_device_update(struct thermal_zone_device *tz, |
408 | enum thermal_notify_event event) | |
0c01ebbf D |
409 | { |
410 | int count; | |
411 | ||
ff140fea ZR |
412 | if (atomic_read(&in_suspend)) |
413 | return; | |
414 | ||
81bd4e1c EV |
415 | if (!tz->ops->get_temp) |
416 | return; | |
417 | ||
0c01ebbf D |
418 | update_temperature(tz); |
419 | ||
060c034a SH |
420 | thermal_zone_set_trips(tz); |
421 | ||
0e70f466 SP |
422 | tz->notify_event = event; |
423 | ||
0c01ebbf D |
424 | for (count = 0; count < tz->trips; count++) |
425 | handle_thermal_trip(tz, count); | |
426 | } | |
910cb1e3 | 427 | EXPORT_SYMBOL_GPL(thermal_zone_device_update); |
0c01ebbf | 428 | |
106339ab EV |
429 | /** |
430 | * thermal_notify_framework - Sensor drivers use this API to notify framework | |
431 | * @tz: thermal zone device | |
432 | * @trip: indicates which trip point has been crossed | |
433 | * | |
434 | * This function handles the trip events from sensor drivers. It starts | |
435 | * throttling the cooling devices according to the policy configured. | |
436 | * For CRITICAL and HOT trip points, this notifies the respective drivers, | |
437 | * and does actual throttling for other trip points i.e ACTIVE and PASSIVE. | |
438 | * The throttling policy is based on the configured platform data; if no | |
439 | * platform data is provided, this uses the step_wise throttling policy. | |
440 | */ | |
441 | void thermal_notify_framework(struct thermal_zone_device *tz, int trip) | |
442 | { | |
443 | handle_thermal_trip(tz, trip); | |
444 | } | |
445 | EXPORT_SYMBOL_GPL(thermal_notify_framework); | |
446 | ||
0c01ebbf D |
447 | static void thermal_zone_device_check(struct work_struct *work) |
448 | { | |
449 | struct thermal_zone_device *tz = container_of(work, struct | |
450 | thermal_zone_device, | |
451 | poll_queue.work); | |
0e70f466 | 452 | thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED); |
0c01ebbf D |
453 | } |
454 | ||
712afbdf EV |
455 | /* |
456 | * Power actor section: interface to power actors to estimate power | |
457 | * | |
458 | * Set of functions used to interact to cooling devices that know | |
459 | * how to estimate their devices power consumption. | |
460 | */ | |
9f38271c | 461 | |
35b11d2e JM |
462 | /** |
463 | * power_actor_get_max_power() - get the maximum power that a cdev can consume | |
464 | * @cdev: pointer to &thermal_cooling_device | |
465 | * @tz: a valid thermal zone device pointer | |
466 | * @max_power: pointer in which to store the maximum power | |
467 | * | |
468 | * Calculate the maximum power consumption in milliwats that the | |
469 | * cooling device can currently consume and store it in @max_power. | |
470 | * | |
471 | * Return: 0 on success, -EINVAL if @cdev doesn't support the | |
472 | * power_actor API or -E* on other error. | |
473 | */ | |
474 | int power_actor_get_max_power(struct thermal_cooling_device *cdev, | |
475 | struct thermal_zone_device *tz, u32 *max_power) | |
476 | { | |
477 | if (!cdev_is_power_actor(cdev)) | |
478 | return -EINVAL; | |
479 | ||
480 | return cdev->ops->state2power(cdev, tz, 0, max_power); | |
481 | } | |
482 | ||
c973c3bc JM |
483 | /** |
484 | * power_actor_get_min_power() - get the mainimum power that a cdev can consume | |
485 | * @cdev: pointer to &thermal_cooling_device | |
486 | * @tz: a valid thermal zone device pointer | |
487 | * @min_power: pointer in which to store the minimum power | |
488 | * | |
489 | * Calculate the minimum power consumption in milliwatts that the | |
490 | * cooling device can currently consume and store it in @min_power. | |
491 | * | |
492 | * Return: 0 on success, -EINVAL if @cdev doesn't support the | |
493 | * power_actor API or -E* on other error. | |
494 | */ | |
495 | int power_actor_get_min_power(struct thermal_cooling_device *cdev, | |
496 | struct thermal_zone_device *tz, u32 *min_power) | |
497 | { | |
498 | unsigned long max_state; | |
499 | int ret; | |
500 | ||
501 | if (!cdev_is_power_actor(cdev)) | |
502 | return -EINVAL; | |
503 | ||
504 | ret = cdev->ops->get_max_state(cdev, &max_state); | |
505 | if (ret) | |
506 | return ret; | |
507 | ||
508 | return cdev->ops->state2power(cdev, tz, max_state, min_power); | |
509 | } | |
510 | ||
35b11d2e | 511 | /** |
1a7e7cc0 | 512 | * power_actor_set_power() - limit the maximum power a cooling device consumes |
35b11d2e JM |
513 | * @cdev: pointer to &thermal_cooling_device |
514 | * @instance: thermal instance to update | |
515 | * @power: the power in milliwatts | |
516 | * | |
1a7e7cc0 EV |
517 | * Set the cooling device to consume at most @power milliwatts. The limit is |
518 | * expected to be a cap at the maximum power consumption. | |
35b11d2e JM |
519 | * |
520 | * Return: 0 on success, -EINVAL if the cooling device does not | |
521 | * implement the power actor API or -E* for other failures. | |
522 | */ | |
523 | int power_actor_set_power(struct thermal_cooling_device *cdev, | |
524 | struct thermal_instance *instance, u32 power) | |
525 | { | |
526 | unsigned long state; | |
527 | int ret; | |
528 | ||
529 | if (!cdev_is_power_actor(cdev)) | |
530 | return -EINVAL; | |
531 | ||
532 | ret = cdev->ops->power2state(cdev, instance->tz, power, &state); | |
533 | if (ret) | |
534 | return ret; | |
535 | ||
536 | instance->target = state; | |
d0b7306d | 537 | mutex_lock(&cdev->lock); |
35b11d2e | 538 | cdev->updated = false; |
d0b7306d | 539 | mutex_unlock(&cdev->lock); |
35b11d2e JM |
540 | thermal_cdev_update(cdev); |
541 | ||
542 | return 0; | |
543 | } | |
544 | ||
3d0055d2 EV |
545 | void thermal_zone_device_rebind_exception(struct thermal_zone_device *tz, |
546 | const char *cdev_type, size_t size) | |
203d3d4a | 547 | { |
3d0055d2 | 548 | struct thermal_cooling_device *cdev = NULL; |
203d3d4a | 549 | |
3d0055d2 EV |
550 | mutex_lock(&thermal_list_lock); |
551 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
552 | /* skip non matching cdevs */ | |
553 | if (strncmp(cdev_type, cdev->type, size)) | |
554 | continue; | |
555 | ||
556 | /* re binding the exception matching the type pattern */ | |
557 | thermal_zone_bind_cooling_device(tz, THERMAL_TRIPS_NONE, cdev, | |
558 | THERMAL_NO_LIMIT, | |
559 | THERMAL_NO_LIMIT, | |
560 | THERMAL_WEIGHT_DEFAULT); | |
561 | } | |
562 | mutex_unlock(&thermal_list_lock); | |
203d3d4a ZR |
563 | } |
564 | ||
3d0055d2 EV |
565 | void thermal_zone_device_unbind_exception(struct thermal_zone_device *tz, |
566 | const char *cdev_type, size_t size) | |
203d3d4a | 567 | { |
3d0055d2 | 568 | struct thermal_cooling_device *cdev = NULL; |
203d3d4a | 569 | |
3d0055d2 EV |
570 | mutex_lock(&thermal_list_lock); |
571 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
572 | /* skip non matching cdevs */ | |
573 | if (strncmp(cdev_type, cdev->type, size)) | |
574 | continue; | |
575 | /* unbinding the exception matching the type pattern */ | |
576 | thermal_zone_unbind_cooling_device(tz, THERMAL_TRIPS_NONE, | |
577 | cdev); | |
578 | } | |
579 | mutex_unlock(&thermal_list_lock); | |
203d3d4a ZR |
580 | } |
581 | ||
81193e2e EV |
582 | /* |
583 | * Device management section: cooling devices, zones devices, and binding | |
584 | * | |
585 | * Set of functions provided by the thermal core for: | |
586 | * - cooling devices lifecycle: registration, unregistration, | |
587 | * binding, and unbinding. | |
588 | * - thermal zone devices lifecycle: registration, unregistration, | |
589 | * binding, and unbinding. | |
590 | */ | |
203d3d4a ZR |
591 | |
592 | /** | |
d2e4eb83 EV |
593 | * thermal_zone_bind_cooling_device() - bind a cooling device to a thermal zone |
594 | * @tz: pointer to struct thermal_zone_device | |
203d3d4a ZR |
595 | * @trip: indicates which trip point the cooling devices is |
596 | * associated with in this thermal zone. | |
d2e4eb83 EV |
597 | * @cdev: pointer to struct thermal_cooling_device |
598 | * @upper: the Maximum cooling state for this trip point. | |
599 | * THERMAL_NO_LIMIT means no upper limit, | |
600 | * and the cooling device can be in max_state. | |
601 | * @lower: the Minimum cooling state can be used for this trip point. | |
602 | * THERMAL_NO_LIMIT means no lower limit, | |
603 | * and the cooling device can be in cooling state 0. | |
6cd9e9f6 KS |
604 | * @weight: The weight of the cooling device to be bound to the |
605 | * thermal zone. Use THERMAL_WEIGHT_DEFAULT for the | |
606 | * default value | |
543a9561 | 607 | * |
d2e4eb83 EV |
608 | * This interface function bind a thermal cooling device to the certain trip |
609 | * point of a thermal zone device. | |
543a9561 | 610 | * This function is usually called in the thermal zone device .bind callback. |
d2e4eb83 EV |
611 | * |
612 | * Return: 0 on success, the proper error value otherwise. | |
203d3d4a ZR |
613 | */ |
614 | int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, | |
615 | int trip, | |
9d99842f | 616 | struct thermal_cooling_device *cdev, |
6cd9e9f6 KS |
617 | unsigned long upper, unsigned long lower, |
618 | unsigned int weight) | |
203d3d4a | 619 | { |
b81b6ba3 ZR |
620 | struct thermal_instance *dev; |
621 | struct thermal_instance *pos; | |
c7516709 TS |
622 | struct thermal_zone_device *pos1; |
623 | struct thermal_cooling_device *pos2; | |
74051ba5 | 624 | unsigned long max_state; |
9a3031dc | 625 | int result, ret; |
203d3d4a | 626 | |
543a9561 | 627 | if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE)) |
203d3d4a ZR |
628 | return -EINVAL; |
629 | ||
c7516709 TS |
630 | list_for_each_entry(pos1, &thermal_tz_list, node) { |
631 | if (pos1 == tz) | |
632 | break; | |
633 | } | |
634 | list_for_each_entry(pos2, &thermal_cdev_list, node) { | |
635 | if (pos2 == cdev) | |
636 | break; | |
637 | } | |
638 | ||
639 | if (tz != pos1 || cdev != pos2) | |
203d3d4a ZR |
640 | return -EINVAL; |
641 | ||
9a3031dc LM |
642 | ret = cdev->ops->get_max_state(cdev, &max_state); |
643 | if (ret) | |
644 | return ret; | |
9d99842f ZR |
645 | |
646 | /* lower default 0, upper default max_state */ | |
647 | lower = lower == THERMAL_NO_LIMIT ? 0 : lower; | |
648 | upper = upper == THERMAL_NO_LIMIT ? max_state : upper; | |
649 | ||
650 | if (lower > upper || upper > max_state) | |
651 | return -EINVAL; | |
652 | ||
95e3ed15 | 653 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
203d3d4a ZR |
654 | if (!dev) |
655 | return -ENOMEM; | |
656 | dev->tz = tz; | |
657 | dev->cdev = cdev; | |
658 | dev->trip = trip; | |
9d99842f ZR |
659 | dev->upper = upper; |
660 | dev->lower = lower; | |
ce119f83 | 661 | dev->target = THERMAL_NO_TARGET; |
6cd9e9f6 | 662 | dev->weight = weight; |
74051ba5 | 663 | |
b31ef828 MW |
664 | result = ida_simple_get(&tz->ida, 0, 0, GFP_KERNEL); |
665 | if (result < 0) | |
203d3d4a ZR |
666 | goto free_mem; |
667 | ||
b31ef828 | 668 | dev->id = result; |
203d3d4a ZR |
669 | sprintf(dev->name, "cdev%d", dev->id); |
670 | result = | |
671 | sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev->name); | |
672 | if (result) | |
b31ef828 | 673 | goto release_ida; |
203d3d4a ZR |
674 | |
675 | sprintf(dev->attr_name, "cdev%d_trip_point", dev->id); | |
975f8c56 | 676 | sysfs_attr_init(&dev->attr.attr); |
203d3d4a ZR |
677 | dev->attr.attr.name = dev->attr_name; |
678 | dev->attr.attr.mode = 0444; | |
679 | dev->attr.show = thermal_cooling_device_trip_point_show; | |
680 | result = device_create_file(&tz->device, &dev->attr); | |
681 | if (result) | |
682 | goto remove_symbol_link; | |
683 | ||
db916513 JM |
684 | sprintf(dev->weight_attr_name, "cdev%d_weight", dev->id); |
685 | sysfs_attr_init(&dev->weight_attr.attr); | |
686 | dev->weight_attr.attr.name = dev->weight_attr_name; | |
687 | dev->weight_attr.attr.mode = S_IWUSR | S_IRUGO; | |
688 | dev->weight_attr.show = thermal_cooling_device_weight_show; | |
689 | dev->weight_attr.store = thermal_cooling_device_weight_store; | |
690 | result = device_create_file(&tz->device, &dev->weight_attr); | |
691 | if (result) | |
692 | goto remove_trip_file; | |
693 | ||
203d3d4a | 694 | mutex_lock(&tz->lock); |
f4a821ce | 695 | mutex_lock(&cdev->lock); |
cddf31b3 | 696 | list_for_each_entry(pos, &tz->thermal_instances, tz_node) |
b659a30d EV |
697 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
698 | result = -EEXIST; | |
699 | break; | |
700 | } | |
b5e4ae62 | 701 | if (!result) { |
cddf31b3 | 702 | list_add_tail(&dev->tz_node, &tz->thermal_instances); |
b5e4ae62 | 703 | list_add_tail(&dev->cdev_node, &cdev->thermal_instances); |
4511f716 | 704 | atomic_set(&tz->need_update, 1); |
b5e4ae62 | 705 | } |
f4a821ce | 706 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
707 | mutex_unlock(&tz->lock); |
708 | ||
709 | if (!result) | |
710 | return 0; | |
711 | ||
db916513 JM |
712 | device_remove_file(&tz->device, &dev->weight_attr); |
713 | remove_trip_file: | |
203d3d4a | 714 | device_remove_file(&tz->device, &dev->attr); |
caca8b80 | 715 | remove_symbol_link: |
203d3d4a | 716 | sysfs_remove_link(&tz->device.kobj, dev->name); |
b31ef828 MW |
717 | release_ida: |
718 | ida_simple_remove(&tz->ida, dev->id); | |
caca8b80 | 719 | free_mem: |
203d3d4a ZR |
720 | kfree(dev); |
721 | return result; | |
722 | } | |
910cb1e3 | 723 | EXPORT_SYMBOL_GPL(thermal_zone_bind_cooling_device); |
203d3d4a ZR |
724 | |
725 | /** | |
9892e5dc EV |
726 | * thermal_zone_unbind_cooling_device() - unbind a cooling device from a |
727 | * thermal zone. | |
728 | * @tz: pointer to a struct thermal_zone_device. | |
203d3d4a ZR |
729 | * @trip: indicates which trip point the cooling devices is |
730 | * associated with in this thermal zone. | |
9892e5dc | 731 | * @cdev: pointer to a struct thermal_cooling_device. |
543a9561 | 732 | * |
9892e5dc EV |
733 | * This interface function unbind a thermal cooling device from the certain |
734 | * trip point of a thermal zone device. | |
543a9561 | 735 | * This function is usually called in the thermal zone device .unbind callback. |
9892e5dc EV |
736 | * |
737 | * Return: 0 on success, the proper error value otherwise. | |
203d3d4a ZR |
738 | */ |
739 | int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz, | |
740 | int trip, | |
741 | struct thermal_cooling_device *cdev) | |
742 | { | |
b81b6ba3 | 743 | struct thermal_instance *pos, *next; |
203d3d4a ZR |
744 | |
745 | mutex_lock(&tz->lock); | |
f4a821ce | 746 | mutex_lock(&cdev->lock); |
cddf31b3 | 747 | list_for_each_entry_safe(pos, next, &tz->thermal_instances, tz_node) { |
543a9561 | 748 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
cddf31b3 | 749 | list_del(&pos->tz_node); |
b5e4ae62 | 750 | list_del(&pos->cdev_node); |
f4a821ce | 751 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
752 | mutex_unlock(&tz->lock); |
753 | goto unbind; | |
754 | } | |
755 | } | |
f4a821ce | 756 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
757 | mutex_unlock(&tz->lock); |
758 | ||
759 | return -ENODEV; | |
760 | ||
caca8b80 | 761 | unbind: |
528464ea | 762 | device_remove_file(&tz->device, &pos->weight_attr); |
203d3d4a ZR |
763 | device_remove_file(&tz->device, &pos->attr); |
764 | sysfs_remove_link(&tz->device.kobj, pos->name); | |
b31ef828 | 765 | ida_simple_remove(&tz->ida, pos->id); |
203d3d4a ZR |
766 | kfree(pos); |
767 | return 0; | |
768 | } | |
910cb1e3 | 769 | EXPORT_SYMBOL_GPL(thermal_zone_unbind_cooling_device); |
203d3d4a ZR |
770 | |
771 | static void thermal_release(struct device *dev) | |
772 | { | |
773 | struct thermal_zone_device *tz; | |
774 | struct thermal_cooling_device *cdev; | |
775 | ||
caca8b80 JP |
776 | if (!strncmp(dev_name(dev), "thermal_zone", |
777 | sizeof("thermal_zone") - 1)) { | |
203d3d4a | 778 | tz = to_thermal_zone(dev); |
f53345e8 JC |
779 | kfree(tz->trip_type_attrs); |
780 | kfree(tz->trip_temp_attrs); | |
781 | kfree(tz->trip_hyst_attrs); | |
782 | kfree(tz->trips_attribute_group.attrs); | |
783 | kfree(tz->device.groups); | |
203d3d4a | 784 | kfree(tz); |
b659a30d EV |
785 | } else if (!strncmp(dev_name(dev), "cooling_device", |
786 | sizeof("cooling_device") - 1)) { | |
203d3d4a ZR |
787 | cdev = to_cooling_device(dev); |
788 | kfree(cdev); | |
789 | } | |
790 | } | |
791 | ||
792 | static struct class thermal_class = { | |
793 | .name = "thermal", | |
794 | .dev_release = thermal_release, | |
795 | }; | |
796 | ||
4b0d3c2d EV |
797 | static inline |
798 | void print_bind_err_msg(struct thermal_zone_device *tz, | |
799 | struct thermal_cooling_device *cdev, int ret) | |
f502ab84 EV |
800 | { |
801 | dev_err(&tz->device, "binding zone %s with cdev %s failed:%d\n", | |
802 | tz->type, cdev->type, ret); | |
803 | } | |
804 | ||
805 | static void __bind(struct thermal_zone_device *tz, int mask, | |
806 | struct thermal_cooling_device *cdev, | |
807 | unsigned long *limits, | |
808 | unsigned int weight) | |
809 | { | |
810 | int i, ret; | |
811 | ||
812 | for (i = 0; i < tz->trips; i++) { | |
813 | if (mask & (1 << i)) { | |
814 | unsigned long upper, lower; | |
815 | ||
816 | upper = THERMAL_NO_LIMIT; | |
817 | lower = THERMAL_NO_LIMIT; | |
818 | if (limits) { | |
819 | lower = limits[i * 2]; | |
820 | upper = limits[i * 2 + 1]; | |
821 | } | |
822 | ret = thermal_zone_bind_cooling_device(tz, i, cdev, | |
823 | upper, lower, | |
824 | weight); | |
825 | if (ret) | |
826 | print_bind_err_msg(tz, cdev, ret); | |
827 | } | |
828 | } | |
829 | } | |
830 | ||
949aad83 EV |
831 | static void bind_cdev(struct thermal_cooling_device *cdev) |
832 | { | |
833 | int i, ret; | |
834 | const struct thermal_zone_params *tzp; | |
835 | struct thermal_zone_device *pos = NULL; | |
836 | ||
837 | mutex_lock(&thermal_list_lock); | |
838 | ||
839 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
840 | if (!pos->tzp && !pos->ops->bind) | |
841 | continue; | |
842 | ||
843 | if (pos->ops->bind) { | |
844 | ret = pos->ops->bind(pos, cdev); | |
845 | if (ret) | |
846 | print_bind_err_msg(pos, cdev, ret); | |
847 | continue; | |
848 | } | |
849 | ||
850 | tzp = pos->tzp; | |
851 | if (!tzp || !tzp->tbp) | |
852 | continue; | |
853 | ||
854 | for (i = 0; i < tzp->num_tbps; i++) { | |
855 | if (tzp->tbp[i].cdev || !tzp->tbp[i].match) | |
856 | continue; | |
857 | if (tzp->tbp[i].match(pos, cdev)) | |
858 | continue; | |
859 | tzp->tbp[i].cdev = cdev; | |
860 | __bind(pos, tzp->tbp[i].trip_mask, cdev, | |
861 | tzp->tbp[i].binding_limits, | |
862 | tzp->tbp[i].weight); | |
863 | } | |
864 | } | |
865 | ||
866 | mutex_unlock(&thermal_list_lock); | |
867 | } | |
868 | ||
203d3d4a | 869 | /** |
a116b5d4 EV |
870 | * __thermal_cooling_device_register() - register a new thermal cooling device |
871 | * @np: a pointer to a device tree node. | |
203d3d4a ZR |
872 | * @type: the thermal cooling device type. |
873 | * @devdata: device private data. | |
874 | * @ops: standard thermal cooling devices callbacks. | |
3a6eccb3 EV |
875 | * |
876 | * This interface function adds a new thermal cooling device (fan/processor/...) | |
877 | * to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself | |
878 | * to all the thermal zone devices registered at the same time. | |
a116b5d4 EV |
879 | * It also gives the opportunity to link the cooling device to a device tree |
880 | * node, so that it can be bound to a thermal zone created out of device tree. | |
3a6eccb3 EV |
881 | * |
882 | * Return: a pointer to the created struct thermal_cooling_device or an | |
883 | * ERR_PTR. Caller must check return value with IS_ERR*() helpers. | |
203d3d4a | 884 | */ |
a116b5d4 EV |
885 | static struct thermal_cooling_device * |
886 | __thermal_cooling_device_register(struct device_node *np, | |
887 | char *type, void *devdata, | |
888 | const struct thermal_cooling_device_ops *ops) | |
203d3d4a ZR |
889 | { |
890 | struct thermal_cooling_device *cdev; | |
4511f716 | 891 | struct thermal_zone_device *pos = NULL; |
203d3d4a ZR |
892 | int result; |
893 | ||
204dd1d3 | 894 | if (type && strlen(type) >= THERMAL_NAME_LENGTH) |
3e6fda5c | 895 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
896 | |
897 | if (!ops || !ops->get_max_state || !ops->get_cur_state || | |
543a9561 | 898 | !ops->set_cur_state) |
3e6fda5c | 899 | return ERR_PTR(-EINVAL); |
203d3d4a | 900 | |
95e3ed15 | 901 | cdev = kzalloc(sizeof(*cdev), GFP_KERNEL); |
203d3d4a | 902 | if (!cdev) |
3e6fda5c | 903 | return ERR_PTR(-ENOMEM); |
203d3d4a | 904 | |
b31ef828 MW |
905 | result = ida_simple_get(&thermal_cdev_ida, 0, 0, GFP_KERNEL); |
906 | if (result < 0) { | |
203d3d4a | 907 | kfree(cdev); |
3e6fda5c | 908 | return ERR_PTR(result); |
203d3d4a ZR |
909 | } |
910 | ||
b31ef828 | 911 | cdev->id = result; |
c7a8b9d9 | 912 | strlcpy(cdev->type, type ? : "", sizeof(cdev->type)); |
f4a821ce | 913 | mutex_init(&cdev->lock); |
b5e4ae62 | 914 | INIT_LIST_HEAD(&cdev->thermal_instances); |
a116b5d4 | 915 | cdev->np = np; |
203d3d4a | 916 | cdev->ops = ops; |
5ca0cce5 | 917 | cdev->updated = false; |
203d3d4a | 918 | cdev->device.class = &thermal_class; |
45cf2ec9 | 919 | thermal_cooling_device_setup_sysfs(cdev); |
203d3d4a | 920 | cdev->devdata = devdata; |
354655ea | 921 | dev_set_name(&cdev->device, "cooling_device%d", cdev->id); |
203d3d4a ZR |
922 | result = device_register(&cdev->device); |
923 | if (result) { | |
b31ef828 | 924 | ida_simple_remove(&thermal_cdev_ida, cdev->id); |
203d3d4a | 925 | kfree(cdev); |
3e6fda5c | 926 | return ERR_PTR(result); |
203d3d4a ZR |
927 | } |
928 | ||
7e8ee1e9 | 929 | /* Add 'this' new cdev to the global cdev list */ |
203d3d4a ZR |
930 | mutex_lock(&thermal_list_lock); |
931 | list_add(&cdev->node, &thermal_cdev_list); | |
203d3d4a ZR |
932 | mutex_unlock(&thermal_list_lock); |
933 | ||
7e8ee1e9 D |
934 | /* Update binding information for 'this' new cdev */ |
935 | bind_cdev(cdev); | |
936 | ||
4511f716 CY |
937 | mutex_lock(&thermal_list_lock); |
938 | list_for_each_entry(pos, &thermal_tz_list, node) | |
939 | if (atomic_cmpxchg(&pos->need_update, 1, 0)) | |
0e70f466 SP |
940 | thermal_zone_device_update(pos, |
941 | THERMAL_EVENT_UNSPECIFIED); | |
4511f716 CY |
942 | mutex_unlock(&thermal_list_lock); |
943 | ||
7e8ee1e9 | 944 | return cdev; |
203d3d4a | 945 | } |
a116b5d4 EV |
946 | |
947 | /** | |
948 | * thermal_cooling_device_register() - register a new thermal cooling device | |
949 | * @type: the thermal cooling device type. | |
950 | * @devdata: device private data. | |
951 | * @ops: standard thermal cooling devices callbacks. | |
952 | * | |
953 | * This interface function adds a new thermal cooling device (fan/processor/...) | |
954 | * to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself | |
955 | * to all the thermal zone devices registered at the same time. | |
956 | * | |
957 | * Return: a pointer to the created struct thermal_cooling_device or an | |
958 | * ERR_PTR. Caller must check return value with IS_ERR*() helpers. | |
959 | */ | |
960 | struct thermal_cooling_device * | |
961 | thermal_cooling_device_register(char *type, void *devdata, | |
962 | const struct thermal_cooling_device_ops *ops) | |
963 | { | |
964 | return __thermal_cooling_device_register(NULL, type, devdata, ops); | |
965 | } | |
910cb1e3 | 966 | EXPORT_SYMBOL_GPL(thermal_cooling_device_register); |
203d3d4a | 967 | |
a116b5d4 EV |
968 | /** |
969 | * thermal_of_cooling_device_register() - register an OF thermal cooling device | |
970 | * @np: a pointer to a device tree node. | |
971 | * @type: the thermal cooling device type. | |
972 | * @devdata: device private data. | |
973 | * @ops: standard thermal cooling devices callbacks. | |
974 | * | |
975 | * This function will register a cooling device with device tree node reference. | |
976 | * This interface function adds a new thermal cooling device (fan/processor/...) | |
977 | * to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself | |
978 | * to all the thermal zone devices registered at the same time. | |
979 | * | |
980 | * Return: a pointer to the created struct thermal_cooling_device or an | |
981 | * ERR_PTR. Caller must check return value with IS_ERR*() helpers. | |
982 | */ | |
983 | struct thermal_cooling_device * | |
984 | thermal_of_cooling_device_register(struct device_node *np, | |
985 | char *type, void *devdata, | |
986 | const struct thermal_cooling_device_ops *ops) | |
987 | { | |
988 | return __thermal_cooling_device_register(np, type, devdata, ops); | |
989 | } | |
990 | EXPORT_SYMBOL_GPL(thermal_of_cooling_device_register); | |
991 | ||
f11997fa EV |
992 | static void __unbind(struct thermal_zone_device *tz, int mask, |
993 | struct thermal_cooling_device *cdev) | |
994 | { | |
995 | int i; | |
996 | ||
997 | for (i = 0; i < tz->trips; i++) | |
998 | if (mask & (1 << i)) | |
999 | thermal_zone_unbind_cooling_device(tz, i, cdev); | |
1000 | } | |
1001 | ||
203d3d4a | 1002 | /** |
38e7b549 | 1003 | * thermal_cooling_device_unregister - removes a thermal cooling device |
203d3d4a ZR |
1004 | * @cdev: the thermal cooling device to remove. |
1005 | * | |
38e7b549 EV |
1006 | * thermal_cooling_device_unregister() must be called when a registered |
1007 | * thermal cooling device is no longer needed. | |
203d3d4a | 1008 | */ |
7e8ee1e9 | 1009 | void thermal_cooling_device_unregister(struct thermal_cooling_device *cdev) |
203d3d4a | 1010 | { |
7e8ee1e9 D |
1011 | int i; |
1012 | const struct thermal_zone_params *tzp; | |
203d3d4a ZR |
1013 | struct thermal_zone_device *tz; |
1014 | struct thermal_cooling_device *pos = NULL; | |
1015 | ||
1016 | if (!cdev) | |
1017 | return; | |
1018 | ||
1019 | mutex_lock(&thermal_list_lock); | |
1020 | list_for_each_entry(pos, &thermal_cdev_list, node) | |
b659a30d EV |
1021 | if (pos == cdev) |
1022 | break; | |
203d3d4a ZR |
1023 | if (pos != cdev) { |
1024 | /* thermal cooling device not found */ | |
1025 | mutex_unlock(&thermal_list_lock); | |
1026 | return; | |
1027 | } | |
1028 | list_del(&cdev->node); | |
7e8ee1e9 D |
1029 | |
1030 | /* Unbind all thermal zones associated with 'this' cdev */ | |
203d3d4a | 1031 | list_for_each_entry(tz, &thermal_tz_list, node) { |
7e8ee1e9 D |
1032 | if (tz->ops->unbind) { |
1033 | tz->ops->unbind(tz, cdev); | |
1034 | continue; | |
1035 | } | |
1036 | ||
1037 | if (!tz->tzp || !tz->tzp->tbp) | |
203d3d4a | 1038 | continue; |
7e8ee1e9 D |
1039 | |
1040 | tzp = tz->tzp; | |
1041 | for (i = 0; i < tzp->num_tbps; i++) { | |
1042 | if (tzp->tbp[i].cdev == cdev) { | |
1043 | __unbind(tz, tzp->tbp[i].trip_mask, cdev); | |
1044 | tzp->tbp[i].cdev = NULL; | |
1045 | } | |
1046 | } | |
203d3d4a | 1047 | } |
7e8ee1e9 | 1048 | |
203d3d4a | 1049 | mutex_unlock(&thermal_list_lock); |
7e8ee1e9 | 1050 | |
b31ef828 | 1051 | ida_simple_remove(&thermal_cdev_ida, cdev->id); |
203d3d4a | 1052 | device_unregister(&cdev->device); |
203d3d4a | 1053 | } |
910cb1e3 | 1054 | EXPORT_SYMBOL_GPL(thermal_cooling_device_unregister); |
203d3d4a | 1055 | |
90f5b5bb | 1056 | static void bind_tz(struct thermal_zone_device *tz) |
ce119f83 | 1057 | { |
90f5b5bb EV |
1058 | int i, ret; |
1059 | struct thermal_cooling_device *pos = NULL; | |
1060 | const struct thermal_zone_params *tzp = tz->tzp; | |
ce119f83 | 1061 | |
90f5b5bb | 1062 | if (!tzp && !tz->ops->bind) |
ce119f83 | 1063 | return; |
c56f5c03 | 1064 | |
90f5b5bb | 1065 | mutex_lock(&thermal_list_lock); |
c56f5c03 | 1066 | |
90f5b5bb EV |
1067 | /* If there is ops->bind, try to use ops->bind */ |
1068 | if (tz->ops->bind) { | |
1069 | list_for_each_entry(pos, &thermal_cdev_list, node) { | |
1070 | ret = tz->ops->bind(tz, pos); | |
1071 | if (ret) | |
1072 | print_bind_err_msg(tz, pos, ret); | |
27365a6c | 1073 | } |
90f5b5bb | 1074 | goto exit; |
27365a6c | 1075 | } |
c56f5c03 | 1076 | |
90f5b5bb EV |
1077 | if (!tzp || !tzp->tbp) |
1078 | goto exit; | |
27365a6c | 1079 | |
90f5b5bb EV |
1080 | list_for_each_entry(pos, &thermal_cdev_list, node) { |
1081 | for (i = 0; i < tzp->num_tbps; i++) { | |
1082 | if (tzp->tbp[i].cdev || !tzp->tbp[i].match) | |
1083 | continue; | |
1084 | if (tzp->tbp[i].match(tz, pos)) | |
1085 | continue; | |
1086 | tzp->tbp[i].cdev = pos; | |
1087 | __bind(tz, tzp->tbp[i].trip_mask, pos, | |
1088 | tzp->tbp[i].binding_limits, | |
1089 | tzp->tbp[i].weight); | |
27365a6c | 1090 | } |
c56f5c03 | 1091 | } |
90f5b5bb EV |
1092 | exit: |
1093 | mutex_unlock(&thermal_list_lock); | |
c56f5c03 D |
1094 | } |
1095 | ||
203d3d4a | 1096 | /** |
a00e55f9 | 1097 | * thermal_zone_device_register() - register a new thermal zone device |
203d3d4a ZR |
1098 | * @type: the thermal zone device type |
1099 | * @trips: the number of trip points the thermal zone support | |
c56f5c03 | 1100 | * @mask: a bit string indicating the writeablility of trip points |
203d3d4a ZR |
1101 | * @devdata: private device data |
1102 | * @ops: standard thermal zone device callbacks | |
50125a9b | 1103 | * @tzp: thermal zone platform parameters |
b1569e99 MG |
1104 | * @passive_delay: number of milliseconds to wait between polls when |
1105 | * performing passive cooling | |
1106 | * @polling_delay: number of milliseconds to wait between polls when checking | |
1107 | * whether trip points have been crossed (0 for interrupt | |
1108 | * driven systems) | |
203d3d4a | 1109 | * |
a00e55f9 EV |
1110 | * This interface function adds a new thermal zone device (sensor) to |
1111 | * /sys/class/thermal folder as thermal_zone[0-*]. It tries to bind all the | |
1112 | * thermal cooling devices registered at the same time. | |
203d3d4a | 1113 | * thermal_zone_device_unregister() must be called when the device is no |
1b7ddb84 | 1114 | * longer needed. The passive cooling depends on the .get_trend() return value. |
a00e55f9 EV |
1115 | * |
1116 | * Return: a pointer to the created struct thermal_zone_device or an | |
1117 | * in case of error, an ERR_PTR. Caller must check return value with | |
1118 | * IS_ERR*() helpers. | |
203d3d4a | 1119 | */ |
eb7be329 EV |
1120 | struct thermal_zone_device * |
1121 | thermal_zone_device_register(const char *type, int trips, int mask, | |
1122 | void *devdata, struct thermal_zone_device_ops *ops, | |
1123 | struct thermal_zone_params *tzp, int passive_delay, | |
1124 | int polling_delay) | |
203d3d4a ZR |
1125 | { |
1126 | struct thermal_zone_device *tz; | |
03a971a2 | 1127 | enum thermal_trip_type trip_type; |
81ad4276 | 1128 | int trip_temp; |
203d3d4a ZR |
1129 | int result; |
1130 | int count; | |
e33df1d2 | 1131 | struct thermal_governor *governor; |
203d3d4a | 1132 | |
54fa38cc EV |
1133 | if (!type || strlen(type) == 0) |
1134 | return ERR_PTR(-EINVAL); | |
1135 | ||
204dd1d3 | 1136 | if (type && strlen(type) >= THERMAL_NAME_LENGTH) |
3e6fda5c | 1137 | return ERR_PTR(-EINVAL); |
203d3d4a | 1138 | |
c56f5c03 | 1139 | if (trips > THERMAL_MAX_TRIPS || trips < 0 || mask >> trips) |
3e6fda5c | 1140 | return ERR_PTR(-EINVAL); |
203d3d4a | 1141 | |
81bd4e1c | 1142 | if (!ops) |
3e6fda5c | 1143 | return ERR_PTR(-EINVAL); |
203d3d4a | 1144 | |
83720d0b | 1145 | if (trips > 0 && (!ops->get_trip_type || !ops->get_trip_temp)) |
6b2aa51d EV |
1146 | return ERR_PTR(-EINVAL); |
1147 | ||
95e3ed15 | 1148 | tz = kzalloc(sizeof(*tz), GFP_KERNEL); |
203d3d4a | 1149 | if (!tz) |
3e6fda5c | 1150 | return ERR_PTR(-ENOMEM); |
203d3d4a | 1151 | |
2d374139 | 1152 | INIT_LIST_HEAD(&tz->thermal_instances); |
b31ef828 | 1153 | ida_init(&tz->ida); |
203d3d4a | 1154 | mutex_init(&tz->lock); |
b31ef828 MW |
1155 | result = ida_simple_get(&thermal_tz_ida, 0, 0, GFP_KERNEL); |
1156 | if (result < 0) { | |
203d3d4a | 1157 | kfree(tz); |
3e6fda5c | 1158 | return ERR_PTR(result); |
203d3d4a ZR |
1159 | } |
1160 | ||
b31ef828 | 1161 | tz->id = result; |
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) { | |
b31ef828 | 1183 | ida_simple_remove(&thermal_tz_ida, tz->id); |
203d3d4a | 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 | ||
b659a30d | 1227 | INIT_DELAYED_WORK(&tz->poll_queue, thermal_zone_device_check); |
b1569e99 | 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: |
b31ef828 | 1237 | ida_simple_remove(&thermal_tz_ida, tz->id); |
203d3d4a | 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) | |
b659a30d EV |
1261 | if (pos == tz) |
1262 | break; | |
203d3d4a ZR |
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 | ||
e33df1d2 | 1292 | thermal_set_governor(tz, NULL); |
203d3d4a | 1293 | |
e68b16ab | 1294 | thermal_remove_hwmon_sysfs(tz); |
b31ef828 MW |
1295 | ida_simple_remove(&thermal_tz_ida, tz->id); |
1296 | ida_destroy(&tz->ida); | |
203d3d4a ZR |
1297 | mutex_destroy(&tz->lock); |
1298 | device_unregister(&tz->device); | |
203d3d4a | 1299 | } |
910cb1e3 | 1300 | EXPORT_SYMBOL_GPL(thermal_zone_device_unregister); |
203d3d4a | 1301 | |
63c4d919 EV |
1302 | /** |
1303 | * thermal_zone_get_zone_by_name() - search for a zone and returns its ref | |
1304 | * @name: thermal zone name to fetch the temperature | |
1305 | * | |
1306 | * When only one zone is found with the passed name, returns a reference to it. | |
1307 | * | |
1308 | * Return: On success returns a reference to an unique thermal zone with | |
1309 | * matching name equals to @name, an ERR_PTR otherwise (-EINVAL for invalid | |
1310 | * paramenters, -ENODEV for not found and -EEXIST for multiple matches). | |
1311 | */ | |
1312 | struct thermal_zone_device *thermal_zone_get_zone_by_name(const char *name) | |
1313 | { | |
1314 | struct thermal_zone_device *pos = NULL, *ref = ERR_PTR(-EINVAL); | |
1315 | unsigned int found = 0; | |
1316 | ||
1317 | if (!name) | |
1318 | goto exit; | |
1319 | ||
1320 | mutex_lock(&thermal_list_lock); | |
1321 | list_for_each_entry(pos, &thermal_tz_list, node) | |
484ac2f3 | 1322 | if (!strncasecmp(name, pos->type, THERMAL_NAME_LENGTH)) { |
63c4d919 EV |
1323 | found++; |
1324 | ref = pos; | |
1325 | } | |
1326 | mutex_unlock(&thermal_list_lock); | |
1327 | ||
1328 | /* nothing has been found, thus an error code for it */ | |
1329 | if (found == 0) | |
1330 | ref = ERR_PTR(-ENODEV); | |
1331 | else if (found > 1) | |
1332 | /* Success only when an unique zone is found */ | |
1333 | ref = ERR_PTR(-EEXIST); | |
1334 | ||
1335 | exit: | |
1336 | return ref; | |
1337 | } | |
1338 | EXPORT_SYMBOL_GPL(thermal_zone_get_zone_by_name); | |
1339 | ||
af06216a | 1340 | #ifdef CONFIG_NET |
2a94fe48 JB |
1341 | static const struct genl_multicast_group thermal_event_mcgrps[] = { |
1342 | { .name = THERMAL_GENL_MCAST_GROUP_NAME, }, | |
1343 | }; | |
1344 | ||
56989f6d | 1345 | static struct genl_family thermal_event_genl_family __ro_after_init = { |
489111e5 | 1346 | .module = THIS_MODULE, |
af06216a RW |
1347 | .name = THERMAL_GENL_FAMILY_NAME, |
1348 | .version = THERMAL_GENL_VERSION, | |
1349 | .maxattr = THERMAL_GENL_ATTR_MAX, | |
2a94fe48 JB |
1350 | .mcgrps = thermal_event_mcgrps, |
1351 | .n_mcgrps = ARRAY_SIZE(thermal_event_mcgrps), | |
af06216a RW |
1352 | }; |
1353 | ||
8ab3e6a0 | 1354 | int thermal_generate_netlink_event(struct thermal_zone_device *tz, |
eb7be329 | 1355 | enum events event) |
4cb18728 D |
1356 | { |
1357 | struct sk_buff *skb; | |
1358 | struct nlattr *attr; | |
1359 | struct thermal_genl_event *thermal_event; | |
1360 | void *msg_header; | |
1361 | int size; | |
1362 | int result; | |
b11de07c | 1363 | static unsigned int thermal_event_seqnum; |
4cb18728 | 1364 | |
8ab3e6a0 EV |
1365 | if (!tz) |
1366 | return -EINVAL; | |
1367 | ||
4cb18728 | 1368 | /* allocate memory */ |
886ee546 JP |
1369 | size = nla_total_size(sizeof(struct thermal_genl_event)) + |
1370 | nla_total_size(0); | |
4cb18728 D |
1371 | |
1372 | skb = genlmsg_new(size, GFP_ATOMIC); | |
1373 | if (!skb) | |
1374 | return -ENOMEM; | |
1375 | ||
1376 | /* add the genetlink message header */ | |
1377 | msg_header = genlmsg_put(skb, 0, thermal_event_seqnum++, | |
1378 | &thermal_event_genl_family, 0, | |
1379 | THERMAL_GENL_CMD_EVENT); | |
1380 | if (!msg_header) { | |
1381 | nlmsg_free(skb); | |
1382 | return -ENOMEM; | |
1383 | } | |
1384 | ||
1385 | /* fill the data */ | |
886ee546 JP |
1386 | attr = nla_reserve(skb, THERMAL_GENL_ATTR_EVENT, |
1387 | sizeof(struct thermal_genl_event)); | |
4cb18728 D |
1388 | |
1389 | if (!attr) { | |
1390 | nlmsg_free(skb); | |
1391 | return -EINVAL; | |
1392 | } | |
1393 | ||
1394 | thermal_event = nla_data(attr); | |
1395 | if (!thermal_event) { | |
1396 | nlmsg_free(skb); | |
1397 | return -EINVAL; | |
1398 | } | |
1399 | ||
1400 | memset(thermal_event, 0, sizeof(struct thermal_genl_event)); | |
1401 | ||
8ab3e6a0 | 1402 | thermal_event->orig = tz->id; |
4cb18728 D |
1403 | thermal_event->event = event; |
1404 | ||
1405 | /* send multicast genetlink message */ | |
053c095a | 1406 | genlmsg_end(skb, msg_header); |
4cb18728 | 1407 | |
68eb5503 | 1408 | result = genlmsg_multicast(&thermal_event_genl_family, skb, 0, |
2a94fe48 | 1409 | 0, GFP_ATOMIC); |
4cb18728 | 1410 | if (result) |
923e0b1e | 1411 | dev_err(&tz->device, "Failed to send netlink event:%d", result); |
4cb18728 D |
1412 | |
1413 | return result; | |
1414 | } | |
910cb1e3 | 1415 | EXPORT_SYMBOL_GPL(thermal_generate_netlink_event); |
4cb18728 | 1416 | |
56989f6d | 1417 | static int __init genetlink_init(void) |
4cb18728 | 1418 | { |
2a94fe48 | 1419 | return genl_register_family(&thermal_event_genl_family); |
4cb18728 D |
1420 | } |
1421 | ||
af06216a RW |
1422 | static void genetlink_exit(void) |
1423 | { | |
1424 | genl_unregister_family(&thermal_event_genl_family); | |
1425 | } | |
1426 | #else /* !CONFIG_NET */ | |
1427 | static inline int genetlink_init(void) { return 0; } | |
1428 | static inline void genetlink_exit(void) {} | |
1429 | #endif /* !CONFIG_NET */ | |
1430 | ||
ff140fea | 1431 | static int thermal_pm_notify(struct notifier_block *nb, |
eb7be329 | 1432 | unsigned long mode, void *_unused) |
ff140fea ZR |
1433 | { |
1434 | struct thermal_zone_device *tz; | |
1435 | ||
1436 | switch (mode) { | |
1437 | case PM_HIBERNATION_PREPARE: | |
1438 | case PM_RESTORE_PREPARE: | |
1439 | case PM_SUSPEND_PREPARE: | |
1440 | atomic_set(&in_suspend, 1); | |
1441 | break; | |
1442 | case PM_POST_HIBERNATION: | |
1443 | case PM_POST_RESTORE: | |
1444 | case PM_POST_SUSPEND: | |
1445 | atomic_set(&in_suspend, 0); | |
1446 | list_for_each_entry(tz, &thermal_tz_list, node) { | |
1447 | thermal_zone_device_reset(tz); | |
0e70f466 SP |
1448 | thermal_zone_device_update(tz, |
1449 | THERMAL_EVENT_UNSPECIFIED); | |
ff140fea ZR |
1450 | } |
1451 | break; | |
1452 | default: | |
1453 | break; | |
1454 | } | |
1455 | return 0; | |
1456 | } | |
1457 | ||
1458 | static struct notifier_block thermal_pm_nb = { | |
1459 | .notifier_call = thermal_pm_notify, | |
1460 | }; | |
1461 | ||
203d3d4a ZR |
1462 | static int __init thermal_init(void) |
1463 | { | |
80a26a5c ZR |
1464 | int result; |
1465 | ||
1466 | result = thermal_register_governors(); | |
1467 | if (result) | |
1468 | goto error; | |
203d3d4a ZR |
1469 | |
1470 | result = class_register(&thermal_class); | |
80a26a5c ZR |
1471 | if (result) |
1472 | goto unregister_governors; | |
1473 | ||
4cb18728 | 1474 | result = genetlink_init(); |
80a26a5c ZR |
1475 | if (result) |
1476 | goto unregister_class; | |
1477 | ||
4e5e4705 EV |
1478 | result = of_parse_thermal_zones(); |
1479 | if (result) | |
1480 | goto exit_netlink; | |
1481 | ||
ff140fea ZR |
1482 | result = register_pm_notifier(&thermal_pm_nb); |
1483 | if (result) | |
1484 | pr_warn("Thermal: Can not register suspend notifier, return %d\n", | |
1485 | result); | |
1486 | ||
80a26a5c ZR |
1487 | return 0; |
1488 | ||
4e5e4705 EV |
1489 | exit_netlink: |
1490 | genetlink_exit(); | |
80a26a5c ZR |
1491 | unregister_class: |
1492 | class_unregister(&thermal_class); | |
9d367e5e LH |
1493 | unregister_governors: |
1494 | thermal_unregister_governors(); | |
80a26a5c | 1495 | error: |
b31ef828 MW |
1496 | ida_destroy(&thermal_tz_ida); |
1497 | ida_destroy(&thermal_cdev_ida); | |
80a26a5c ZR |
1498 | mutex_destroy(&thermal_list_lock); |
1499 | mutex_destroy(&thermal_governor_lock); | |
203d3d4a ZR |
1500 | return result; |
1501 | } | |
1502 | ||
1503 | static void __exit thermal_exit(void) | |
1504 | { | |
ff140fea | 1505 | unregister_pm_notifier(&thermal_pm_nb); |
4e5e4705 | 1506 | of_thermal_destroy_zones(); |
80a26a5c | 1507 | genetlink_exit(); |
203d3d4a | 1508 | class_unregister(&thermal_class); |
80a26a5c | 1509 | thermal_unregister_governors(); |
b31ef828 MW |
1510 | ida_destroy(&thermal_tz_ida); |
1511 | ida_destroy(&thermal_cdev_ida); | |
203d3d4a | 1512 | mutex_destroy(&thermal_list_lock); |
80a26a5c | 1513 | mutex_destroy(&thermal_governor_lock); |
203d3d4a ZR |
1514 | } |
1515 | ||
4cb18728 | 1516 | fs_initcall(thermal_init); |
203d3d4a | 1517 | module_exit(thermal_exit); |