]>
Commit | Line | Data |
---|---|---|
203d3d4a ZR |
1 | /* |
2 | * thermal.c - Generic Thermal Management Sysfs support. | |
3 | * | |
4 | * Copyright (C) 2008 Intel Corp | |
5 | * Copyright (C) 2008 Zhang Rui <rui.zhang@intel.com> | |
6 | * Copyright (C) 2008 Sujith Thomas <sujith.thomas@intel.com> | |
7 | * | |
203d3d4a ZR |
8 | * This program is free software; you can redistribute it and/or modify |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; version 2 of the License. | |
203d3d4a ZR |
11 | */ |
12 | ||
c5a01dd5 JP |
13 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
14 | ||
203d3d4a ZR |
15 | #include <linux/module.h> |
16 | #include <linux/device.h> | |
17 | #include <linux/err.h> | |
5a0e3ad6 | 18 | #include <linux/slab.h> |
203d3d4a ZR |
19 | #include <linux/kdev_t.h> |
20 | #include <linux/idr.h> | |
21 | #include <linux/thermal.h> | |
b1569e99 | 22 | #include <linux/reboot.h> |
42a5bf50 | 23 | #include <linux/string.h> |
a116b5d4 | 24 | #include <linux/of.h> |
4cb18728 D |
25 | #include <net/netlink.h> |
26 | #include <net/genetlink.h> | |
ff140fea | 27 | #include <linux/suspend.h> |
203d3d4a | 28 | |
100a8fdb PA |
29 | #define CREATE_TRACE_POINTS |
30 | #include <trace/events/thermal.h> | |
31 | ||
71350db4 | 32 | #include "thermal_core.h" |
0dd88793 | 33 | #include "thermal_hwmon.h" |
71350db4 | 34 | |
63c4ec90 | 35 | MODULE_AUTHOR("Zhang Rui"); |
203d3d4a | 36 | MODULE_DESCRIPTION("Generic thermal management sysfs support"); |
6d8d4974 | 37 | MODULE_LICENSE("GPL v2"); |
203d3d4a | 38 | |
203d3d4a ZR |
39 | static DEFINE_IDR(thermal_tz_idr); |
40 | static DEFINE_IDR(thermal_cdev_idr); | |
41 | static DEFINE_MUTEX(thermal_idr_lock); | |
42 | ||
43 | static LIST_HEAD(thermal_tz_list); | |
44 | static LIST_HEAD(thermal_cdev_list); | |
a4a15485 D |
45 | static LIST_HEAD(thermal_governor_list); |
46 | ||
203d3d4a | 47 | static DEFINE_MUTEX(thermal_list_lock); |
a4a15485 D |
48 | static DEFINE_MUTEX(thermal_governor_lock); |
49 | ||
ff140fea ZR |
50 | static atomic_t in_suspend; |
51 | ||
f2234bcd ZR |
52 | static struct thermal_governor *def_governor; |
53 | ||
1b4f4849 EV |
54 | /* |
55 | * Governor section: set of functions to handle thermal governors | |
56 | * | |
57 | * Functions to help in the life cycle of thermal governors within | |
58 | * the thermal core and by the thermal governor code. | |
59 | */ | |
60 | ||
a4a15485 D |
61 | static struct thermal_governor *__find_governor(const char *name) |
62 | { | |
63 | struct thermal_governor *pos; | |
64 | ||
f2234bcd ZR |
65 | if (!name || !name[0]) |
66 | return def_governor; | |
67 | ||
a4a15485 | 68 | list_for_each_entry(pos, &thermal_governor_list, governor_list) |
484ac2f3 | 69 | if (!strncasecmp(name, pos->name, THERMAL_NAME_LENGTH)) |
a4a15485 D |
70 | return pos; |
71 | ||
72 | return NULL; | |
73 | } | |
74 | ||
e33df1d2 JM |
75 | /** |
76 | * bind_previous_governor() - bind the previous governor of the thermal zone | |
77 | * @tz: a valid pointer to a struct thermal_zone_device | |
78 | * @failed_gov_name: the name of the governor that failed to register | |
79 | * | |
80 | * Register the previous governor of the thermal zone after a new | |
81 | * governor has failed to be bound. | |
82 | */ | |
83 | static void bind_previous_governor(struct thermal_zone_device *tz, | |
84 | const char *failed_gov_name) | |
85 | { | |
86 | if (tz->governor && tz->governor->bind_to_tz) { | |
87 | if (tz->governor->bind_to_tz(tz)) { | |
88 | dev_err(&tz->device, | |
89 | "governor %s failed to bind and the previous one (%s) failed to bind again, thermal zone %s has no governor\n", | |
90 | failed_gov_name, tz->governor->name, tz->type); | |
91 | tz->governor = NULL; | |
92 | } | |
93 | } | |
94 | } | |
95 | ||
96 | /** | |
97 | * thermal_set_governor() - Switch to another governor | |
98 | * @tz: a valid pointer to a struct thermal_zone_device | |
99 | * @new_gov: pointer to the new governor | |
100 | * | |
101 | * Change the governor of thermal zone @tz. | |
102 | * | |
103 | * Return: 0 on success, an error if the new governor's bind_to_tz() failed. | |
104 | */ | |
105 | static int thermal_set_governor(struct thermal_zone_device *tz, | |
106 | struct thermal_governor *new_gov) | |
107 | { | |
108 | int ret = 0; | |
109 | ||
110 | if (tz->governor && tz->governor->unbind_from_tz) | |
111 | tz->governor->unbind_from_tz(tz); | |
112 | ||
113 | if (new_gov && new_gov->bind_to_tz) { | |
114 | ret = new_gov->bind_to_tz(tz); | |
115 | if (ret) { | |
116 | bind_previous_governor(tz, new_gov->name); | |
117 | ||
118 | return ret; | |
119 | } | |
120 | } | |
121 | ||
122 | tz->governor = new_gov; | |
123 | ||
124 | return ret; | |
125 | } | |
126 | ||
a4a15485 D |
127 | int thermal_register_governor(struct thermal_governor *governor) |
128 | { | |
129 | int err; | |
130 | const char *name; | |
131 | struct thermal_zone_device *pos; | |
132 | ||
133 | if (!governor) | |
134 | return -EINVAL; | |
135 | ||
136 | mutex_lock(&thermal_governor_lock); | |
137 | ||
138 | err = -EBUSY; | |
5027ba36 | 139 | if (!__find_governor(governor->name)) { |
eb7be329 EV |
140 | bool match_default; |
141 | ||
a4a15485 D |
142 | err = 0; |
143 | list_add(&governor->governor_list, &thermal_governor_list); | |
eb7be329 EV |
144 | match_default = !strncmp(governor->name, |
145 | DEFAULT_THERMAL_GOVERNOR, | |
146 | THERMAL_NAME_LENGTH); | |
147 | ||
148 | if (!def_governor && match_default) | |
f2234bcd | 149 | def_governor = governor; |
a4a15485 D |
150 | } |
151 | ||
152 | mutex_lock(&thermal_list_lock); | |
153 | ||
154 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
f2234bcd ZR |
155 | /* |
156 | * only thermal zones with specified tz->tzp->governor_name | |
157 | * may run with tz->govenor unset | |
158 | */ | |
a4a15485 D |
159 | if (pos->governor) |
160 | continue; | |
f2234bcd ZR |
161 | |
162 | name = pos->tzp->governor_name; | |
163 | ||
e33df1d2 JM |
164 | if (!strncasecmp(name, governor->name, THERMAL_NAME_LENGTH)) { |
165 | int ret; | |
166 | ||
167 | ret = thermal_set_governor(pos, governor); | |
168 | if (ret) | |
169 | dev_err(&pos->device, | |
170 | "Failed to set governor %s for thermal zone %s: %d\n", | |
171 | governor->name, pos->type, ret); | |
172 | } | |
a4a15485 D |
173 | } |
174 | ||
175 | mutex_unlock(&thermal_list_lock); | |
176 | mutex_unlock(&thermal_governor_lock); | |
177 | ||
178 | return err; | |
179 | } | |
a4a15485 D |
180 | |
181 | void thermal_unregister_governor(struct thermal_governor *governor) | |
182 | { | |
183 | struct thermal_zone_device *pos; | |
184 | ||
185 | if (!governor) | |
186 | return; | |
187 | ||
188 | mutex_lock(&thermal_governor_lock); | |
189 | ||
5027ba36 | 190 | if (!__find_governor(governor->name)) |
a4a15485 D |
191 | goto exit; |
192 | ||
193 | mutex_lock(&thermal_list_lock); | |
194 | ||
195 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
484ac2f3 | 196 | if (!strncasecmp(pos->governor->name, governor->name, |
eb7be329 | 197 | THERMAL_NAME_LENGTH)) |
e33df1d2 | 198 | thermal_set_governor(pos, NULL); |
a4a15485 D |
199 | } |
200 | ||
201 | mutex_unlock(&thermal_list_lock); | |
202 | list_del(&governor->governor_list); | |
203 | exit: | |
204 | mutex_unlock(&thermal_governor_lock); | |
9b4298a0 | 205 | } |
9b4298a0 | 206 | |
1b4f4849 EV |
207 | int thermal_zone_device_set_policy(struct thermal_zone_device *tz, |
208 | char *policy) | |
9b4298a0 | 209 | { |
1b4f4849 EV |
210 | struct thermal_governor *gov; |
211 | int ret = -EINVAL; | |
9b4298a0 | 212 | |
1b4f4849 | 213 | mutex_lock(&thermal_governor_lock); |
9b4298a0 | 214 | mutex_lock(&tz->lock); |
9b4298a0 | 215 | |
1b4f4849 EV |
216 | gov = __find_governor(strim(policy)); |
217 | if (!gov) | |
218 | goto exit; | |
9b4298a0 | 219 | |
1b4f4849 | 220 | ret = thermal_set_governor(tz, gov); |
9b4298a0 | 221 | |
1b4f4849 EV |
222 | exit: |
223 | mutex_unlock(&tz->lock); | |
224 | mutex_unlock(&thermal_governor_lock); | |
9b4298a0 | 225 | |
1b4f4849 | 226 | return ret; |
7e8ee1e9 D |
227 | } |
228 | ||
1b4f4849 | 229 | int thermal_build_list_of_policies(char *buf) |
7e8ee1e9 | 230 | { |
1b4f4849 EV |
231 | struct thermal_governor *pos; |
232 | ssize_t count = 0; | |
233 | ssize_t size = PAGE_SIZE; | |
7e8ee1e9 | 234 | |
1b4f4849 | 235 | mutex_lock(&thermal_governor_lock); |
a8892d83 | 236 | |
1b4f4849 EV |
237 | list_for_each_entry(pos, &thermal_governor_list, governor_list) { |
238 | size = PAGE_SIZE - count; | |
239 | count += scnprintf(buf + count, size, "%s ", pos->name); | |
7e8ee1e9 | 240 | } |
1b4f4849 | 241 | count += scnprintf(buf + count, size, "\n"); |
7e8ee1e9 | 242 | |
1b4f4849 | 243 | mutex_unlock(&thermal_governor_lock); |
7e8ee1e9 | 244 | |
1b4f4849 | 245 | return count; |
7e8ee1e9 D |
246 | } |
247 | ||
1b4f4849 | 248 | static int __init thermal_register_governors(void) |
7e8ee1e9 | 249 | { |
1b4f4849 | 250 | int result; |
7e8ee1e9 | 251 | |
1b4f4849 EV |
252 | result = thermal_gov_step_wise_register(); |
253 | if (result) | |
254 | return result; | |
7e8ee1e9 | 255 | |
1b4f4849 EV |
256 | result = thermal_gov_fair_share_register(); |
257 | if (result) | |
258 | return result; | |
7e8ee1e9 | 259 | |
1b4f4849 EV |
260 | result = thermal_gov_bang_bang_register(); |
261 | if (result) | |
262 | return result; | |
7e8ee1e9 | 263 | |
1b4f4849 EV |
264 | result = thermal_gov_user_space_register(); |
265 | if (result) | |
266 | return result; | |
7e8ee1e9 | 267 | |
1b4f4849 | 268 | return thermal_gov_power_allocator_register(); |
7e8ee1e9 D |
269 | } |
270 | ||
1b4f4849 | 271 | static void thermal_unregister_governors(void) |
7e8ee1e9 | 272 | { |
1b4f4849 EV |
273 | thermal_gov_step_wise_unregister(); |
274 | thermal_gov_fair_share_unregister(); | |
275 | thermal_gov_bang_bang_unregister(); | |
276 | thermal_gov_user_space_unregister(); | |
277 | thermal_gov_power_allocator_unregister(); | |
7e8ee1e9 D |
278 | } |
279 | ||
8772e185 EV |
280 | /* |
281 | * Zone update section: main control loop applied to each zone while monitoring | |
282 | * | |
283 | * in polling mode. The monitoring is done using a workqueue. | |
284 | * Same update may be done on a zone by calling thermal_zone_device_update(). | |
285 | * | |
286 | * An update means: | |
287 | * - Non-critical trips will invoke the governor responsible for that zone; | |
288 | * - Hot trips will produce a notification to userspace; | |
289 | * - Critical trip point will cause a system shutdown. | |
290 | */ | |
0c01ebbf D |
291 | static void thermal_zone_device_set_polling(struct thermal_zone_device *tz, |
292 | int delay) | |
293 | { | |
294 | if (delay > 1000) | |
295 | mod_delayed_work(system_freezable_wq, &tz->poll_queue, | |
296 | round_jiffies(msecs_to_jiffies(delay))); | |
297 | else if (delay) | |
298 | mod_delayed_work(system_freezable_wq, &tz->poll_queue, | |
299 | msecs_to_jiffies(delay)); | |
300 | else | |
301 | cancel_delayed_work(&tz->poll_queue); | |
302 | } | |
303 | ||
304 | static void monitor_thermal_zone(struct thermal_zone_device *tz) | |
305 | { | |
306 | mutex_lock(&tz->lock); | |
307 | ||
308 | if (tz->passive) | |
309 | thermal_zone_device_set_polling(tz, tz->passive_delay); | |
310 | else if (tz->polling_delay) | |
311 | thermal_zone_device_set_polling(tz, tz->polling_delay); | |
312 | else | |
313 | thermal_zone_device_set_polling(tz, 0); | |
314 | ||
315 | mutex_unlock(&tz->lock); | |
316 | } | |
317 | ||
318 | static void handle_non_critical_trips(struct thermal_zone_device *tz, | |
eb7be329 EV |
319 | int trip, |
320 | enum thermal_trip_type trip_type) | |
0c01ebbf | 321 | { |
f2234bcd ZR |
322 | tz->governor ? tz->governor->throttle(tz, trip) : |
323 | def_governor->throttle(tz, trip); | |
0c01ebbf D |
324 | } |
325 | ||
326 | static void handle_critical_trips(struct thermal_zone_device *tz, | |
eb7be329 | 327 | int trip, enum thermal_trip_type trip_type) |
0c01ebbf | 328 | { |
17e8351a | 329 | int trip_temp; |
0c01ebbf D |
330 | |
331 | tz->ops->get_trip_temp(tz, trip, &trip_temp); | |
332 | ||
333 | /* If we have not crossed the trip_temp, we do not care. */ | |
84ffe3ec | 334 | if (trip_temp <= 0 || tz->temperature < trip_temp) |
0c01ebbf D |
335 | return; |
336 | ||
208cd822 PA |
337 | trace_thermal_zone_trip(tz, trip, trip_type); |
338 | ||
0c01ebbf D |
339 | if (tz->ops->notify) |
340 | tz->ops->notify(tz, trip, trip_type); | |
341 | ||
342 | if (trip_type == THERMAL_TRIP_CRITICAL) { | |
923e0b1e EV |
343 | dev_emerg(&tz->device, |
344 | "critical temperature reached(%d C),shutting down\n", | |
345 | tz->temperature / 1000); | |
0c01ebbf D |
346 | orderly_poweroff(true); |
347 | } | |
348 | } | |
349 | ||
350 | static void handle_thermal_trip(struct thermal_zone_device *tz, int trip) | |
351 | { | |
352 | enum thermal_trip_type type; | |
353 | ||
81ad4276 ZR |
354 | /* Ignore disabled trip points */ |
355 | if (test_bit(trip, &tz->trips_disabled)) | |
356 | return; | |
357 | ||
0c01ebbf D |
358 | tz->ops->get_trip_type(tz, trip, &type); |
359 | ||
360 | if (type == THERMAL_TRIP_CRITICAL || type == THERMAL_TRIP_HOT) | |
361 | handle_critical_trips(tz, trip, type); | |
362 | else | |
363 | handle_non_critical_trips(tz, trip, type); | |
364 | /* | |
365 | * Alright, we handled this trip successfully. | |
366 | * So, start monitoring again. | |
367 | */ | |
368 | monitor_thermal_zone(tz); | |
369 | } | |
370 | ||
371 | static void update_temperature(struct thermal_zone_device *tz) | |
372 | { | |
17e8351a | 373 | int temp, ret; |
0c01ebbf | 374 | |
e6e238c3 | 375 | ret = thermal_zone_get_temp(tz, &temp); |
0c01ebbf | 376 | if (ret) { |
7e497a73 HG |
377 | if (ret != -EAGAIN) |
378 | dev_warn(&tz->device, | |
379 | "failed to read out thermal zone (%d)\n", | |
380 | ret); | |
e6e238c3 | 381 | return; |
0c01ebbf D |
382 | } |
383 | ||
e6e238c3 | 384 | mutex_lock(&tz->lock); |
0c01ebbf D |
385 | tz->last_temperature = tz->temperature; |
386 | tz->temperature = temp; | |
0c01ebbf | 387 | mutex_unlock(&tz->lock); |
06475b55 | 388 | |
100a8fdb | 389 | trace_thermal_temperature(tz); |
bb431ba2 ZR |
390 | if (tz->last_temperature == THERMAL_TEMP_INVALID) |
391 | dev_dbg(&tz->device, "last_temperature N/A, current_temperature=%d\n", | |
392 | tz->temperature); | |
393 | else | |
394 | dev_dbg(&tz->device, "last_temperature=%d, current_temperature=%d\n", | |
395 | tz->last_temperature, tz->temperature); | |
396 | } | |
397 | ||
398 | static void thermal_zone_device_reset(struct thermal_zone_device *tz) | |
399 | { | |
400 | struct thermal_instance *pos; | |
401 | ||
402 | tz->temperature = THERMAL_TEMP_INVALID; | |
403 | tz->passive = 0; | |
404 | list_for_each_entry(pos, &tz->thermal_instances, tz_node) | |
405 | pos->initialized = false; | |
0c01ebbf D |
406 | } |
407 | ||
0e70f466 SP |
408 | void thermal_zone_device_update(struct thermal_zone_device *tz, |
409 | enum thermal_notify_event event) | |
0c01ebbf D |
410 | { |
411 | int count; | |
412 | ||
ff140fea ZR |
413 | if (atomic_read(&in_suspend)) |
414 | return; | |
415 | ||
81bd4e1c EV |
416 | if (!tz->ops->get_temp) |
417 | return; | |
418 | ||
0c01ebbf D |
419 | update_temperature(tz); |
420 | ||
060c034a SH |
421 | thermal_zone_set_trips(tz); |
422 | ||
0e70f466 SP |
423 | tz->notify_event = event; |
424 | ||
0c01ebbf D |
425 | for (count = 0; count < tz->trips; count++) |
426 | handle_thermal_trip(tz, count); | |
427 | } | |
910cb1e3 | 428 | EXPORT_SYMBOL_GPL(thermal_zone_device_update); |
0c01ebbf | 429 | |
106339ab EV |
430 | /** |
431 | * thermal_notify_framework - Sensor drivers use this API to notify framework | |
432 | * @tz: thermal zone device | |
433 | * @trip: indicates which trip point has been crossed | |
434 | * | |
435 | * This function handles the trip events from sensor drivers. It starts | |
436 | * throttling the cooling devices according to the policy configured. | |
437 | * For CRITICAL and HOT trip points, this notifies the respective drivers, | |
438 | * and does actual throttling for other trip points i.e ACTIVE and PASSIVE. | |
439 | * The throttling policy is based on the configured platform data; if no | |
440 | * platform data is provided, this uses the step_wise throttling policy. | |
441 | */ | |
442 | void thermal_notify_framework(struct thermal_zone_device *tz, int trip) | |
443 | { | |
444 | handle_thermal_trip(tz, trip); | |
445 | } | |
446 | EXPORT_SYMBOL_GPL(thermal_notify_framework); | |
447 | ||
0c01ebbf D |
448 | static void thermal_zone_device_check(struct work_struct *work) |
449 | { | |
450 | struct thermal_zone_device *tz = container_of(work, struct | |
451 | thermal_zone_device, | |
452 | poll_queue.work); | |
0e70f466 | 453 | thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED); |
0c01ebbf D |
454 | } |
455 | ||
712afbdf EV |
456 | /* |
457 | * Power actor section: interface to power actors to estimate power | |
458 | * | |
459 | * Set of functions used to interact to cooling devices that know | |
460 | * how to estimate their devices power consumption. | |
461 | */ | |
9f38271c | 462 | |
35b11d2e JM |
463 | /** |
464 | * power_actor_get_max_power() - get the maximum power that a cdev can consume | |
465 | * @cdev: pointer to &thermal_cooling_device | |
466 | * @tz: a valid thermal zone device pointer | |
467 | * @max_power: pointer in which to store the maximum power | |
468 | * | |
469 | * Calculate the maximum power consumption in milliwats that the | |
470 | * cooling device can currently consume and store it in @max_power. | |
471 | * | |
472 | * Return: 0 on success, -EINVAL if @cdev doesn't support the | |
473 | * power_actor API or -E* on other error. | |
474 | */ | |
475 | int power_actor_get_max_power(struct thermal_cooling_device *cdev, | |
476 | struct thermal_zone_device *tz, u32 *max_power) | |
477 | { | |
478 | if (!cdev_is_power_actor(cdev)) | |
479 | return -EINVAL; | |
480 | ||
481 | return cdev->ops->state2power(cdev, tz, 0, max_power); | |
482 | } | |
483 | ||
c973c3bc JM |
484 | /** |
485 | * power_actor_get_min_power() - get the mainimum power that a cdev can consume | |
486 | * @cdev: pointer to &thermal_cooling_device | |
487 | * @tz: a valid thermal zone device pointer | |
488 | * @min_power: pointer in which to store the minimum power | |
489 | * | |
490 | * Calculate the minimum power consumption in milliwatts that the | |
491 | * cooling device can currently consume and store it in @min_power. | |
492 | * | |
493 | * Return: 0 on success, -EINVAL if @cdev doesn't support the | |
494 | * power_actor API or -E* on other error. | |
495 | */ | |
496 | int power_actor_get_min_power(struct thermal_cooling_device *cdev, | |
497 | struct thermal_zone_device *tz, u32 *min_power) | |
498 | { | |
499 | unsigned long max_state; | |
500 | int ret; | |
501 | ||
502 | if (!cdev_is_power_actor(cdev)) | |
503 | return -EINVAL; | |
504 | ||
505 | ret = cdev->ops->get_max_state(cdev, &max_state); | |
506 | if (ret) | |
507 | return ret; | |
508 | ||
509 | return cdev->ops->state2power(cdev, tz, max_state, min_power); | |
510 | } | |
511 | ||
35b11d2e | 512 | /** |
1a7e7cc0 | 513 | * power_actor_set_power() - limit the maximum power a cooling device consumes |
35b11d2e JM |
514 | * @cdev: pointer to &thermal_cooling_device |
515 | * @instance: thermal instance to update | |
516 | * @power: the power in milliwatts | |
517 | * | |
1a7e7cc0 EV |
518 | * Set the cooling device to consume at most @power milliwatts. The limit is |
519 | * expected to be a cap at the maximum power consumption. | |
35b11d2e JM |
520 | * |
521 | * Return: 0 on success, -EINVAL if the cooling device does not | |
522 | * implement the power actor API or -E* for other failures. | |
523 | */ | |
524 | int power_actor_set_power(struct thermal_cooling_device *cdev, | |
525 | struct thermal_instance *instance, u32 power) | |
526 | { | |
527 | unsigned long state; | |
528 | int ret; | |
529 | ||
530 | if (!cdev_is_power_actor(cdev)) | |
531 | return -EINVAL; | |
532 | ||
533 | ret = cdev->ops->power2state(cdev, instance->tz, power, &state); | |
534 | if (ret) | |
535 | return ret; | |
536 | ||
537 | instance->target = state; | |
d0b7306d | 538 | mutex_lock(&cdev->lock); |
35b11d2e | 539 | cdev->updated = false; |
d0b7306d | 540 | mutex_unlock(&cdev->lock); |
35b11d2e JM |
541 | thermal_cdev_update(cdev); |
542 | ||
543 | return 0; | |
544 | } | |
545 | ||
3d0055d2 EV |
546 | void thermal_zone_device_rebind_exception(struct thermal_zone_device *tz, |
547 | const char *cdev_type, size_t size) | |
203d3d4a | 548 | { |
3d0055d2 | 549 | struct thermal_cooling_device *cdev = NULL; |
203d3d4a | 550 | |
3d0055d2 EV |
551 | mutex_lock(&thermal_list_lock); |
552 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
553 | /* skip non matching cdevs */ | |
554 | if (strncmp(cdev_type, cdev->type, size)) | |
555 | continue; | |
556 | ||
557 | /* re binding the exception matching the type pattern */ | |
558 | thermal_zone_bind_cooling_device(tz, THERMAL_TRIPS_NONE, cdev, | |
559 | THERMAL_NO_LIMIT, | |
560 | THERMAL_NO_LIMIT, | |
561 | THERMAL_WEIGHT_DEFAULT); | |
562 | } | |
563 | mutex_unlock(&thermal_list_lock); | |
203d3d4a ZR |
564 | } |
565 | ||
3d0055d2 EV |
566 | void thermal_zone_device_unbind_exception(struct thermal_zone_device *tz, |
567 | const char *cdev_type, size_t size) | |
203d3d4a | 568 | { |
3d0055d2 | 569 | struct thermal_cooling_device *cdev = NULL; |
203d3d4a | 570 | |
3d0055d2 EV |
571 | mutex_lock(&thermal_list_lock); |
572 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
573 | /* skip non matching cdevs */ | |
574 | if (strncmp(cdev_type, cdev->type, size)) | |
575 | continue; | |
576 | /* unbinding the exception matching the type pattern */ | |
577 | thermal_zone_unbind_cooling_device(tz, THERMAL_TRIPS_NONE, | |
578 | cdev); | |
579 | } | |
580 | mutex_unlock(&thermal_list_lock); | |
203d3d4a ZR |
581 | } |
582 | ||
81193e2e EV |
583 | /* |
584 | * Device management section: cooling devices, zones devices, and binding | |
585 | * | |
586 | * Set of functions provided by the thermal core for: | |
587 | * - cooling devices lifecycle: registration, unregistration, | |
588 | * binding, and unbinding. | |
589 | * - thermal zone devices lifecycle: registration, unregistration, | |
590 | * binding, and unbinding. | |
591 | */ | |
c30176fc | 592 | static int get_idr(struct idr *idr, struct mutex *lock, int *id) |
203d3d4a | 593 | { |
6503e5df | 594 | int ret; |
203d3d4a | 595 | |
c30176fc EV |
596 | if (lock) |
597 | mutex_lock(lock); | |
598 | ret = idr_alloc(idr, NULL, 0, 0, GFP_KERNEL); | |
599 | if (lock) | |
600 | mutex_unlock(lock); | |
601 | if (unlikely(ret < 0)) | |
6503e5df | 602 | return ret; |
c30176fc EV |
603 | *id = ret; |
604 | return 0; | |
db916513 JM |
605 | } |
606 | ||
c30176fc EV |
607 | static void release_idr(struct idr *idr, struct mutex *lock, int id) |
608 | { | |
609 | if (lock) | |
610 | mutex_lock(lock); | |
611 | idr_remove(idr, id); | |
612 | if (lock) | |
613 | mutex_unlock(lock); | |
db916513 | 614 | } |
203d3d4a ZR |
615 | |
616 | /** | |
d2e4eb83 EV |
617 | * thermal_zone_bind_cooling_device() - bind a cooling device to a thermal zone |
618 | * @tz: pointer to struct thermal_zone_device | |
203d3d4a ZR |
619 | * @trip: indicates which trip point the cooling devices is |
620 | * associated with in this thermal zone. | |
d2e4eb83 EV |
621 | * @cdev: pointer to struct thermal_cooling_device |
622 | * @upper: the Maximum cooling state for this trip point. | |
623 | * THERMAL_NO_LIMIT means no upper limit, | |
624 | * and the cooling device can be in max_state. | |
625 | * @lower: the Minimum cooling state can be used for this trip point. | |
626 | * THERMAL_NO_LIMIT means no lower limit, | |
627 | * and the cooling device can be in cooling state 0. | |
6cd9e9f6 KS |
628 | * @weight: The weight of the cooling device to be bound to the |
629 | * thermal zone. Use THERMAL_WEIGHT_DEFAULT for the | |
630 | * default value | |
543a9561 | 631 | * |
d2e4eb83 EV |
632 | * This interface function bind a thermal cooling device to the certain trip |
633 | * point of a thermal zone device. | |
543a9561 | 634 | * This function is usually called in the thermal zone device .bind callback. |
d2e4eb83 EV |
635 | * |
636 | * Return: 0 on success, the proper error value otherwise. | |
203d3d4a ZR |
637 | */ |
638 | int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, | |
639 | int trip, | |
9d99842f | 640 | struct thermal_cooling_device *cdev, |
6cd9e9f6 KS |
641 | unsigned long upper, unsigned long lower, |
642 | unsigned int weight) | |
203d3d4a | 643 | { |
b81b6ba3 ZR |
644 | struct thermal_instance *dev; |
645 | struct thermal_instance *pos; | |
c7516709 TS |
646 | struct thermal_zone_device *pos1; |
647 | struct thermal_cooling_device *pos2; | |
74051ba5 | 648 | unsigned long max_state; |
9a3031dc | 649 | int result, ret; |
203d3d4a | 650 | |
543a9561 | 651 | if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE)) |
203d3d4a ZR |
652 | return -EINVAL; |
653 | ||
c7516709 TS |
654 | list_for_each_entry(pos1, &thermal_tz_list, node) { |
655 | if (pos1 == tz) | |
656 | break; | |
657 | } | |
658 | list_for_each_entry(pos2, &thermal_cdev_list, node) { | |
659 | if (pos2 == cdev) | |
660 | break; | |
661 | } | |
662 | ||
663 | if (tz != pos1 || cdev != pos2) | |
203d3d4a ZR |
664 | return -EINVAL; |
665 | ||
9a3031dc LM |
666 | ret = cdev->ops->get_max_state(cdev, &max_state); |
667 | if (ret) | |
668 | return ret; | |
9d99842f ZR |
669 | |
670 | /* lower default 0, upper default max_state */ | |
671 | lower = lower == THERMAL_NO_LIMIT ? 0 : lower; | |
672 | upper = upper == THERMAL_NO_LIMIT ? max_state : upper; | |
673 | ||
674 | if (lower > upper || upper > max_state) | |
675 | return -EINVAL; | |
676 | ||
95e3ed15 | 677 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
203d3d4a ZR |
678 | if (!dev) |
679 | return -ENOMEM; | |
680 | dev->tz = tz; | |
681 | dev->cdev = cdev; | |
682 | dev->trip = trip; | |
9d99842f ZR |
683 | dev->upper = upper; |
684 | dev->lower = lower; | |
ce119f83 | 685 | dev->target = THERMAL_NO_TARGET; |
6cd9e9f6 | 686 | dev->weight = weight; |
74051ba5 | 687 | |
203d3d4a ZR |
688 | result = get_idr(&tz->idr, &tz->lock, &dev->id); |
689 | if (result) | |
690 | goto free_mem; | |
691 | ||
692 | sprintf(dev->name, "cdev%d", dev->id); | |
693 | result = | |
694 | sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev->name); | |
695 | if (result) | |
696 | goto release_idr; | |
697 | ||
698 | sprintf(dev->attr_name, "cdev%d_trip_point", dev->id); | |
975f8c56 | 699 | sysfs_attr_init(&dev->attr.attr); |
203d3d4a ZR |
700 | dev->attr.attr.name = dev->attr_name; |
701 | dev->attr.attr.mode = 0444; | |
702 | dev->attr.show = thermal_cooling_device_trip_point_show; | |
703 | result = device_create_file(&tz->device, &dev->attr); | |
704 | if (result) | |
705 | goto remove_symbol_link; | |
706 | ||
db916513 JM |
707 | sprintf(dev->weight_attr_name, "cdev%d_weight", dev->id); |
708 | sysfs_attr_init(&dev->weight_attr.attr); | |
709 | dev->weight_attr.attr.name = dev->weight_attr_name; | |
710 | dev->weight_attr.attr.mode = S_IWUSR | S_IRUGO; | |
711 | dev->weight_attr.show = thermal_cooling_device_weight_show; | |
712 | dev->weight_attr.store = thermal_cooling_device_weight_store; | |
713 | result = device_create_file(&tz->device, &dev->weight_attr); | |
714 | if (result) | |
715 | goto remove_trip_file; | |
716 | ||
203d3d4a | 717 | mutex_lock(&tz->lock); |
f4a821ce | 718 | mutex_lock(&cdev->lock); |
cddf31b3 | 719 | list_for_each_entry(pos, &tz->thermal_instances, tz_node) |
b659a30d EV |
720 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
721 | result = -EEXIST; | |
722 | break; | |
723 | } | |
b5e4ae62 | 724 | if (!result) { |
cddf31b3 | 725 | list_add_tail(&dev->tz_node, &tz->thermal_instances); |
b5e4ae62 | 726 | list_add_tail(&dev->cdev_node, &cdev->thermal_instances); |
4511f716 | 727 | atomic_set(&tz->need_update, 1); |
b5e4ae62 | 728 | } |
f4a821ce | 729 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
730 | mutex_unlock(&tz->lock); |
731 | ||
732 | if (!result) | |
733 | return 0; | |
734 | ||
db916513 JM |
735 | device_remove_file(&tz->device, &dev->weight_attr); |
736 | remove_trip_file: | |
203d3d4a | 737 | device_remove_file(&tz->device, &dev->attr); |
caca8b80 | 738 | remove_symbol_link: |
203d3d4a | 739 | sysfs_remove_link(&tz->device.kobj, dev->name); |
caca8b80 | 740 | release_idr: |
203d3d4a | 741 | release_idr(&tz->idr, &tz->lock, dev->id); |
caca8b80 | 742 | free_mem: |
203d3d4a ZR |
743 | kfree(dev); |
744 | return result; | |
745 | } | |
910cb1e3 | 746 | EXPORT_SYMBOL_GPL(thermal_zone_bind_cooling_device); |
203d3d4a ZR |
747 | |
748 | /** | |
9892e5dc EV |
749 | * thermal_zone_unbind_cooling_device() - unbind a cooling device from a |
750 | * thermal zone. | |
751 | * @tz: pointer to a struct thermal_zone_device. | |
203d3d4a ZR |
752 | * @trip: indicates which trip point the cooling devices is |
753 | * associated with in this thermal zone. | |
9892e5dc | 754 | * @cdev: pointer to a struct thermal_cooling_device. |
543a9561 | 755 | * |
9892e5dc EV |
756 | * This interface function unbind a thermal cooling device from the certain |
757 | * trip point of a thermal zone device. | |
543a9561 | 758 | * This function is usually called in the thermal zone device .unbind callback. |
9892e5dc EV |
759 | * |
760 | * Return: 0 on success, the proper error value otherwise. | |
203d3d4a ZR |
761 | */ |
762 | int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz, | |
763 | int trip, | |
764 | struct thermal_cooling_device *cdev) | |
765 | { | |
b81b6ba3 | 766 | struct thermal_instance *pos, *next; |
203d3d4a ZR |
767 | |
768 | mutex_lock(&tz->lock); | |
f4a821ce | 769 | mutex_lock(&cdev->lock); |
cddf31b3 | 770 | list_for_each_entry_safe(pos, next, &tz->thermal_instances, tz_node) { |
543a9561 | 771 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
cddf31b3 | 772 | list_del(&pos->tz_node); |
b5e4ae62 | 773 | list_del(&pos->cdev_node); |
f4a821ce | 774 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
775 | mutex_unlock(&tz->lock); |
776 | goto unbind; | |
777 | } | |
778 | } | |
f4a821ce | 779 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
780 | mutex_unlock(&tz->lock); |
781 | ||
782 | return -ENODEV; | |
783 | ||
caca8b80 | 784 | unbind: |
528464ea | 785 | device_remove_file(&tz->device, &pos->weight_attr); |
203d3d4a ZR |
786 | device_remove_file(&tz->device, &pos->attr); |
787 | sysfs_remove_link(&tz->device.kobj, pos->name); | |
788 | release_idr(&tz->idr, &tz->lock, pos->id); | |
789 | kfree(pos); | |
790 | return 0; | |
791 | } | |
910cb1e3 | 792 | EXPORT_SYMBOL_GPL(thermal_zone_unbind_cooling_device); |
203d3d4a ZR |
793 | |
794 | static void thermal_release(struct device *dev) | |
795 | { | |
796 | struct thermal_zone_device *tz; | |
797 | struct thermal_cooling_device *cdev; | |
798 | ||
caca8b80 JP |
799 | if (!strncmp(dev_name(dev), "thermal_zone", |
800 | sizeof("thermal_zone") - 1)) { | |
203d3d4a | 801 | tz = to_thermal_zone(dev); |
f53345e8 JC |
802 | kfree(tz->trip_type_attrs); |
803 | kfree(tz->trip_temp_attrs); | |
804 | kfree(tz->trip_hyst_attrs); | |
805 | kfree(tz->trips_attribute_group.attrs); | |
806 | kfree(tz->device.groups); | |
203d3d4a | 807 | kfree(tz); |
b659a30d EV |
808 | } else if (!strncmp(dev_name(dev), "cooling_device", |
809 | sizeof("cooling_device") - 1)) { | |
203d3d4a ZR |
810 | cdev = to_cooling_device(dev); |
811 | kfree(cdev); | |
812 | } | |
813 | } | |
814 | ||
815 | static struct class thermal_class = { | |
816 | .name = "thermal", | |
817 | .dev_release = thermal_release, | |
818 | }; | |
819 | ||
4b0d3c2d EV |
820 | static inline |
821 | void print_bind_err_msg(struct thermal_zone_device *tz, | |
822 | struct thermal_cooling_device *cdev, int ret) | |
f502ab84 EV |
823 | { |
824 | dev_err(&tz->device, "binding zone %s with cdev %s failed:%d\n", | |
825 | tz->type, cdev->type, ret); | |
826 | } | |
827 | ||
828 | static void __bind(struct thermal_zone_device *tz, int mask, | |
829 | struct thermal_cooling_device *cdev, | |
830 | unsigned long *limits, | |
831 | unsigned int weight) | |
832 | { | |
833 | int i, ret; | |
834 | ||
835 | for (i = 0; i < tz->trips; i++) { | |
836 | if (mask & (1 << i)) { | |
837 | unsigned long upper, lower; | |
838 | ||
839 | upper = THERMAL_NO_LIMIT; | |
840 | lower = THERMAL_NO_LIMIT; | |
841 | if (limits) { | |
842 | lower = limits[i * 2]; | |
843 | upper = limits[i * 2 + 1]; | |
844 | } | |
845 | ret = thermal_zone_bind_cooling_device(tz, i, cdev, | |
846 | upper, lower, | |
847 | weight); | |
848 | if (ret) | |
849 | print_bind_err_msg(tz, cdev, ret); | |
850 | } | |
851 | } | |
852 | } | |
853 | ||
949aad83 EV |
854 | static void bind_cdev(struct thermal_cooling_device *cdev) |
855 | { | |
856 | int i, ret; | |
857 | const struct thermal_zone_params *tzp; | |
858 | struct thermal_zone_device *pos = NULL; | |
859 | ||
860 | mutex_lock(&thermal_list_lock); | |
861 | ||
862 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
863 | if (!pos->tzp && !pos->ops->bind) | |
864 | continue; | |
865 | ||
866 | if (pos->ops->bind) { | |
867 | ret = pos->ops->bind(pos, cdev); | |
868 | if (ret) | |
869 | print_bind_err_msg(pos, cdev, ret); | |
870 | continue; | |
871 | } | |
872 | ||
873 | tzp = pos->tzp; | |
874 | if (!tzp || !tzp->tbp) | |
875 | continue; | |
876 | ||
877 | for (i = 0; i < tzp->num_tbps; i++) { | |
878 | if (tzp->tbp[i].cdev || !tzp->tbp[i].match) | |
879 | continue; | |
880 | if (tzp->tbp[i].match(pos, cdev)) | |
881 | continue; | |
882 | tzp->tbp[i].cdev = cdev; | |
883 | __bind(pos, tzp->tbp[i].trip_mask, cdev, | |
884 | tzp->tbp[i].binding_limits, | |
885 | tzp->tbp[i].weight); | |
886 | } | |
887 | } | |
888 | ||
889 | mutex_unlock(&thermal_list_lock); | |
890 | } | |
891 | ||
203d3d4a | 892 | /** |
a116b5d4 EV |
893 | * __thermal_cooling_device_register() - register a new thermal cooling device |
894 | * @np: a pointer to a device tree node. | |
203d3d4a ZR |
895 | * @type: the thermal cooling device type. |
896 | * @devdata: device private data. | |
897 | * @ops: standard thermal cooling devices callbacks. | |
3a6eccb3 EV |
898 | * |
899 | * This interface function adds a new thermal cooling device (fan/processor/...) | |
900 | * to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself | |
901 | * to all the thermal zone devices registered at the same time. | |
a116b5d4 EV |
902 | * It also gives the opportunity to link the cooling device to a device tree |
903 | * node, so that it can be bound to a thermal zone created out of device tree. | |
3a6eccb3 EV |
904 | * |
905 | * Return: a pointer to the created struct thermal_cooling_device or an | |
906 | * ERR_PTR. Caller must check return value with IS_ERR*() helpers. | |
203d3d4a | 907 | */ |
a116b5d4 EV |
908 | static struct thermal_cooling_device * |
909 | __thermal_cooling_device_register(struct device_node *np, | |
910 | char *type, void *devdata, | |
911 | const struct thermal_cooling_device_ops *ops) | |
203d3d4a ZR |
912 | { |
913 | struct thermal_cooling_device *cdev; | |
4511f716 | 914 | struct thermal_zone_device *pos = NULL; |
203d3d4a ZR |
915 | int result; |
916 | ||
204dd1d3 | 917 | if (type && strlen(type) >= THERMAL_NAME_LENGTH) |
3e6fda5c | 918 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
919 | |
920 | if (!ops || !ops->get_max_state || !ops->get_cur_state || | |
543a9561 | 921 | !ops->set_cur_state) |
3e6fda5c | 922 | return ERR_PTR(-EINVAL); |
203d3d4a | 923 | |
95e3ed15 | 924 | cdev = kzalloc(sizeof(*cdev), GFP_KERNEL); |
203d3d4a | 925 | if (!cdev) |
3e6fda5c | 926 | return ERR_PTR(-ENOMEM); |
203d3d4a ZR |
927 | |
928 | result = get_idr(&thermal_cdev_idr, &thermal_idr_lock, &cdev->id); | |
929 | if (result) { | |
930 | kfree(cdev); | |
3e6fda5c | 931 | return ERR_PTR(result); |
203d3d4a ZR |
932 | } |
933 | ||
c7a8b9d9 | 934 | strlcpy(cdev->type, type ? : "", sizeof(cdev->type)); |
f4a821ce | 935 | mutex_init(&cdev->lock); |
b5e4ae62 | 936 | INIT_LIST_HEAD(&cdev->thermal_instances); |
a116b5d4 | 937 | cdev->np = np; |
203d3d4a | 938 | cdev->ops = ops; |
5ca0cce5 | 939 | cdev->updated = false; |
203d3d4a | 940 | cdev->device.class = &thermal_class; |
45cf2ec9 | 941 | thermal_cooling_device_setup_sysfs(cdev); |
203d3d4a | 942 | cdev->devdata = devdata; |
354655ea | 943 | dev_set_name(&cdev->device, "cooling_device%d", cdev->id); |
203d3d4a ZR |
944 | result = device_register(&cdev->device); |
945 | if (result) { | |
946 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
947 | kfree(cdev); | |
3e6fda5c | 948 | return ERR_PTR(result); |
203d3d4a ZR |
949 | } |
950 | ||
7e8ee1e9 | 951 | /* Add 'this' new cdev to the global cdev list */ |
203d3d4a ZR |
952 | mutex_lock(&thermal_list_lock); |
953 | list_add(&cdev->node, &thermal_cdev_list); | |
203d3d4a ZR |
954 | mutex_unlock(&thermal_list_lock); |
955 | ||
7e8ee1e9 D |
956 | /* Update binding information for 'this' new cdev */ |
957 | bind_cdev(cdev); | |
958 | ||
4511f716 CY |
959 | mutex_lock(&thermal_list_lock); |
960 | list_for_each_entry(pos, &thermal_tz_list, node) | |
961 | if (atomic_cmpxchg(&pos->need_update, 1, 0)) | |
0e70f466 SP |
962 | thermal_zone_device_update(pos, |
963 | THERMAL_EVENT_UNSPECIFIED); | |
4511f716 CY |
964 | mutex_unlock(&thermal_list_lock); |
965 | ||
7e8ee1e9 | 966 | return cdev; |
203d3d4a | 967 | } |
a116b5d4 EV |
968 | |
969 | /** | |
970 | * thermal_cooling_device_register() - register a new thermal cooling device | |
971 | * @type: the thermal cooling device type. | |
972 | * @devdata: device private data. | |
973 | * @ops: standard thermal cooling devices callbacks. | |
974 | * | |
975 | * This interface function adds a new thermal cooling device (fan/processor/...) | |
976 | * to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself | |
977 | * to all the thermal zone devices registered at the same time. | |
978 | * | |
979 | * Return: a pointer to the created struct thermal_cooling_device or an | |
980 | * ERR_PTR. Caller must check return value with IS_ERR*() helpers. | |
981 | */ | |
982 | struct thermal_cooling_device * | |
983 | thermal_cooling_device_register(char *type, void *devdata, | |
984 | const struct thermal_cooling_device_ops *ops) | |
985 | { | |
986 | return __thermal_cooling_device_register(NULL, type, devdata, ops); | |
987 | } | |
910cb1e3 | 988 | EXPORT_SYMBOL_GPL(thermal_cooling_device_register); |
203d3d4a | 989 | |
a116b5d4 EV |
990 | /** |
991 | * thermal_of_cooling_device_register() - register an OF thermal cooling device | |
992 | * @np: a pointer to a device tree node. | |
993 | * @type: the thermal cooling device type. | |
994 | * @devdata: device private data. | |
995 | * @ops: standard thermal cooling devices callbacks. | |
996 | * | |
997 | * This function will register a cooling device with device tree node reference. | |
998 | * This interface function adds a new thermal cooling device (fan/processor/...) | |
999 | * to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself | |
1000 | * to all the thermal zone devices registered at the same time. | |
1001 | * | |
1002 | * Return: a pointer to the created struct thermal_cooling_device or an | |
1003 | * ERR_PTR. Caller must check return value with IS_ERR*() helpers. | |
1004 | */ | |
1005 | struct thermal_cooling_device * | |
1006 | thermal_of_cooling_device_register(struct device_node *np, | |
1007 | char *type, void *devdata, | |
1008 | const struct thermal_cooling_device_ops *ops) | |
1009 | { | |
1010 | return __thermal_cooling_device_register(np, type, devdata, ops); | |
1011 | } | |
1012 | EXPORT_SYMBOL_GPL(thermal_of_cooling_device_register); | |
1013 | ||
f11997fa EV |
1014 | static void __unbind(struct thermal_zone_device *tz, int mask, |
1015 | struct thermal_cooling_device *cdev) | |
1016 | { | |
1017 | int i; | |
1018 | ||
1019 | for (i = 0; i < tz->trips; i++) | |
1020 | if (mask & (1 << i)) | |
1021 | thermal_zone_unbind_cooling_device(tz, i, cdev); | |
1022 | } | |
1023 | ||
203d3d4a | 1024 | /** |
38e7b549 | 1025 | * thermal_cooling_device_unregister - removes a thermal cooling device |
203d3d4a ZR |
1026 | * @cdev: the thermal cooling device to remove. |
1027 | * | |
38e7b549 EV |
1028 | * thermal_cooling_device_unregister() must be called when a registered |
1029 | * thermal cooling device is no longer needed. | |
203d3d4a | 1030 | */ |
7e8ee1e9 | 1031 | void thermal_cooling_device_unregister(struct thermal_cooling_device *cdev) |
203d3d4a | 1032 | { |
7e8ee1e9 D |
1033 | int i; |
1034 | const struct thermal_zone_params *tzp; | |
203d3d4a ZR |
1035 | struct thermal_zone_device *tz; |
1036 | struct thermal_cooling_device *pos = NULL; | |
1037 | ||
1038 | if (!cdev) | |
1039 | return; | |
1040 | ||
1041 | mutex_lock(&thermal_list_lock); | |
1042 | list_for_each_entry(pos, &thermal_cdev_list, node) | |
b659a30d EV |
1043 | if (pos == cdev) |
1044 | break; | |
203d3d4a ZR |
1045 | if (pos != cdev) { |
1046 | /* thermal cooling device not found */ | |
1047 | mutex_unlock(&thermal_list_lock); | |
1048 | return; | |
1049 | } | |
1050 | list_del(&cdev->node); | |
7e8ee1e9 D |
1051 | |
1052 | /* Unbind all thermal zones associated with 'this' cdev */ | |
203d3d4a | 1053 | list_for_each_entry(tz, &thermal_tz_list, node) { |
7e8ee1e9 D |
1054 | if (tz->ops->unbind) { |
1055 | tz->ops->unbind(tz, cdev); | |
1056 | continue; | |
1057 | } | |
1058 | ||
1059 | if (!tz->tzp || !tz->tzp->tbp) | |
203d3d4a | 1060 | continue; |
7e8ee1e9 D |
1061 | |
1062 | tzp = tz->tzp; | |
1063 | for (i = 0; i < tzp->num_tbps; i++) { | |
1064 | if (tzp->tbp[i].cdev == cdev) { | |
1065 | __unbind(tz, tzp->tbp[i].trip_mask, cdev); | |
1066 | tzp->tbp[i].cdev = NULL; | |
1067 | } | |
1068 | } | |
203d3d4a | 1069 | } |
7e8ee1e9 | 1070 | |
203d3d4a | 1071 | mutex_unlock(&thermal_list_lock); |
7e8ee1e9 | 1072 | |
203d3d4a ZR |
1073 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); |
1074 | device_unregister(&cdev->device); | |
203d3d4a | 1075 | } |
910cb1e3 | 1076 | EXPORT_SYMBOL_GPL(thermal_cooling_device_unregister); |
203d3d4a | 1077 | |
90f5b5bb | 1078 | static void bind_tz(struct thermal_zone_device *tz) |
ce119f83 | 1079 | { |
90f5b5bb EV |
1080 | int i, ret; |
1081 | struct thermal_cooling_device *pos = NULL; | |
1082 | const struct thermal_zone_params *tzp = tz->tzp; | |
ce119f83 | 1083 | |
90f5b5bb | 1084 | if (!tzp && !tz->ops->bind) |
ce119f83 | 1085 | return; |
c56f5c03 | 1086 | |
90f5b5bb | 1087 | mutex_lock(&thermal_list_lock); |
c56f5c03 | 1088 | |
90f5b5bb EV |
1089 | /* If there is ops->bind, try to use ops->bind */ |
1090 | if (tz->ops->bind) { | |
1091 | list_for_each_entry(pos, &thermal_cdev_list, node) { | |
1092 | ret = tz->ops->bind(tz, pos); | |
1093 | if (ret) | |
1094 | print_bind_err_msg(tz, pos, ret); | |
27365a6c | 1095 | } |
90f5b5bb | 1096 | goto exit; |
27365a6c | 1097 | } |
c56f5c03 | 1098 | |
90f5b5bb EV |
1099 | if (!tzp || !tzp->tbp) |
1100 | goto exit; | |
27365a6c | 1101 | |
90f5b5bb EV |
1102 | list_for_each_entry(pos, &thermal_cdev_list, node) { |
1103 | for (i = 0; i < tzp->num_tbps; i++) { | |
1104 | if (tzp->tbp[i].cdev || !tzp->tbp[i].match) | |
1105 | continue; | |
1106 | if (tzp->tbp[i].match(tz, pos)) | |
1107 | continue; | |
1108 | tzp->tbp[i].cdev = pos; | |
1109 | __bind(tz, tzp->tbp[i].trip_mask, pos, | |
1110 | tzp->tbp[i].binding_limits, | |
1111 | tzp->tbp[i].weight); | |
27365a6c | 1112 | } |
c56f5c03 | 1113 | } |
90f5b5bb EV |
1114 | exit: |
1115 | mutex_unlock(&thermal_list_lock); | |
c56f5c03 D |
1116 | } |
1117 | ||
203d3d4a | 1118 | /** |
a00e55f9 | 1119 | * thermal_zone_device_register() - register a new thermal zone device |
203d3d4a ZR |
1120 | * @type: the thermal zone device type |
1121 | * @trips: the number of trip points the thermal zone support | |
c56f5c03 | 1122 | * @mask: a bit string indicating the writeablility of trip points |
203d3d4a ZR |
1123 | * @devdata: private device data |
1124 | * @ops: standard thermal zone device callbacks | |
50125a9b | 1125 | * @tzp: thermal zone platform parameters |
b1569e99 MG |
1126 | * @passive_delay: number of milliseconds to wait between polls when |
1127 | * performing passive cooling | |
1128 | * @polling_delay: number of milliseconds to wait between polls when checking | |
1129 | * whether trip points have been crossed (0 for interrupt | |
1130 | * driven systems) | |
203d3d4a | 1131 | * |
a00e55f9 EV |
1132 | * This interface function adds a new thermal zone device (sensor) to |
1133 | * /sys/class/thermal folder as thermal_zone[0-*]. It tries to bind all the | |
1134 | * thermal cooling devices registered at the same time. | |
203d3d4a | 1135 | * thermal_zone_device_unregister() must be called when the device is no |
1b7ddb84 | 1136 | * longer needed. The passive cooling depends on the .get_trend() return value. |
a00e55f9 EV |
1137 | * |
1138 | * Return: a pointer to the created struct thermal_zone_device or an | |
1139 | * in case of error, an ERR_PTR. Caller must check return value with | |
1140 | * IS_ERR*() helpers. | |
203d3d4a | 1141 | */ |
eb7be329 EV |
1142 | struct thermal_zone_device * |
1143 | thermal_zone_device_register(const char *type, int trips, int mask, | |
1144 | void *devdata, struct thermal_zone_device_ops *ops, | |
1145 | struct thermal_zone_params *tzp, int passive_delay, | |
1146 | int polling_delay) | |
203d3d4a ZR |
1147 | { |
1148 | struct thermal_zone_device *tz; | |
03a971a2 | 1149 | enum thermal_trip_type trip_type; |
81ad4276 | 1150 | int trip_temp; |
203d3d4a ZR |
1151 | int result; |
1152 | int count; | |
e33df1d2 | 1153 | struct thermal_governor *governor; |
203d3d4a | 1154 | |
54fa38cc EV |
1155 | if (!type || strlen(type) == 0) |
1156 | return ERR_PTR(-EINVAL); | |
1157 | ||
204dd1d3 | 1158 | if (type && strlen(type) >= THERMAL_NAME_LENGTH) |
3e6fda5c | 1159 | return ERR_PTR(-EINVAL); |
203d3d4a | 1160 | |
c56f5c03 | 1161 | if (trips > THERMAL_MAX_TRIPS || trips < 0 || mask >> trips) |
3e6fda5c | 1162 | return ERR_PTR(-EINVAL); |
203d3d4a | 1163 | |
81bd4e1c | 1164 | if (!ops) |
3e6fda5c | 1165 | return ERR_PTR(-EINVAL); |
203d3d4a | 1166 | |
83720d0b | 1167 | if (trips > 0 && (!ops->get_trip_type || !ops->get_trip_temp)) |
6b2aa51d EV |
1168 | return ERR_PTR(-EINVAL); |
1169 | ||
95e3ed15 | 1170 | tz = kzalloc(sizeof(*tz), GFP_KERNEL); |
203d3d4a | 1171 | if (!tz) |
3e6fda5c | 1172 | return ERR_PTR(-ENOMEM); |
203d3d4a | 1173 | |
2d374139 | 1174 | INIT_LIST_HEAD(&tz->thermal_instances); |
203d3d4a ZR |
1175 | idr_init(&tz->idr); |
1176 | mutex_init(&tz->lock); | |
1177 | result = get_idr(&thermal_tz_idr, &thermal_idr_lock, &tz->id); | |
1178 | if (result) { | |
1179 | kfree(tz); | |
3e6fda5c | 1180 | return ERR_PTR(result); |
203d3d4a ZR |
1181 | } |
1182 | ||
54fa38cc | 1183 | strlcpy(tz->type, type, sizeof(tz->type)); |
203d3d4a | 1184 | tz->ops = ops; |
50125a9b | 1185 | tz->tzp = tzp; |
203d3d4a ZR |
1186 | tz->device.class = &thermal_class; |
1187 | tz->devdata = devdata; | |
1188 | tz->trips = trips; | |
b1569e99 MG |
1189 | tz->passive_delay = passive_delay; |
1190 | tz->polling_delay = polling_delay; | |
1c600861 | 1191 | |
4d0fe749 | 1192 | /* sys I/F */ |
1c600861 | 1193 | /* Add nodes that are always present via .groups */ |
4d0fe749 EV |
1194 | result = thermal_zone_create_device_groups(tz, mask); |
1195 | if (result) | |
1196 | goto unregister; | |
1197 | ||
4511f716 CY |
1198 | /* A new thermal zone needs to be updated anyway. */ |
1199 | atomic_set(&tz->need_update, 1); | |
b1569e99 | 1200 | |
354655ea | 1201 | dev_set_name(&tz->device, "thermal_zone%d", tz->id); |
203d3d4a ZR |
1202 | result = device_register(&tz->device); |
1203 | if (result) { | |
1204 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); | |
1205 | kfree(tz); | |
3e6fda5c | 1206 | return ERR_PTR(result); |
203d3d4a ZR |
1207 | } |
1208 | ||
203d3d4a | 1209 | for (count = 0; count < trips; count++) { |
81ad4276 ZR |
1210 | if (tz->ops->get_trip_type(tz, count, &trip_type)) |
1211 | set_bit(count, &tz->trips_disabled); | |
81ad4276 ZR |
1212 | if (tz->ops->get_trip_temp(tz, count, &trip_temp)) |
1213 | set_bit(count, &tz->trips_disabled); | |
1214 | /* Check for bogus trip points */ | |
1215 | if (trip_temp == 0) | |
1216 | set_bit(count, &tz->trips_disabled); | |
203d3d4a ZR |
1217 | } |
1218 | ||
a4a15485 D |
1219 | /* Update 'this' zone's governor information */ |
1220 | mutex_lock(&thermal_governor_lock); | |
1221 | ||
1222 | if (tz->tzp) | |
e33df1d2 | 1223 | governor = __find_governor(tz->tzp->governor_name); |
a4a15485 | 1224 | else |
e33df1d2 JM |
1225 | governor = def_governor; |
1226 | ||
1227 | result = thermal_set_governor(tz, governor); | |
1228 | if (result) { | |
1229 | mutex_unlock(&thermal_governor_lock); | |
1230 | goto unregister; | |
1231 | } | |
a4a15485 D |
1232 | |
1233 | mutex_unlock(&thermal_governor_lock); | |
1234 | ||
ccba4ffd EV |
1235 | if (!tz->tzp || !tz->tzp->no_hwmon) { |
1236 | result = thermal_add_hwmon_sysfs(tz); | |
1237 | if (result) | |
1238 | goto unregister; | |
1239 | } | |
e68b16ab | 1240 | |
203d3d4a ZR |
1241 | mutex_lock(&thermal_list_lock); |
1242 | list_add_tail(&tz->node, &thermal_tz_list); | |
203d3d4a ZR |
1243 | mutex_unlock(&thermal_list_lock); |
1244 | ||
7e8ee1e9 D |
1245 | /* Bind cooling devices for this zone */ |
1246 | bind_tz(tz); | |
1247 | ||
b659a30d | 1248 | INIT_DELAYED_WORK(&tz->poll_queue, thermal_zone_device_check); |
b1569e99 | 1249 | |
bb431ba2 | 1250 | thermal_zone_device_reset(tz); |
4511f716 CY |
1251 | /* Update the new thermal zone and mark it as already updated. */ |
1252 | if (atomic_cmpxchg(&tz->need_update, 1, 0)) | |
0e70f466 | 1253 | thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED); |
b1569e99 | 1254 | |
14015860 | 1255 | return tz; |
203d3d4a | 1256 | |
caca8b80 | 1257 | unregister: |
203d3d4a ZR |
1258 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1259 | device_unregister(&tz->device); | |
3e6fda5c | 1260 | return ERR_PTR(result); |
203d3d4a | 1261 | } |
910cb1e3 | 1262 | EXPORT_SYMBOL_GPL(thermal_zone_device_register); |
203d3d4a ZR |
1263 | |
1264 | /** | |
1265 | * thermal_device_unregister - removes the registered thermal zone device | |
203d3d4a ZR |
1266 | * @tz: the thermal zone device to remove |
1267 | */ | |
1268 | void thermal_zone_device_unregister(struct thermal_zone_device *tz) | |
1269 | { | |
7e8ee1e9 D |
1270 | int i; |
1271 | const struct thermal_zone_params *tzp; | |
203d3d4a ZR |
1272 | struct thermal_cooling_device *cdev; |
1273 | struct thermal_zone_device *pos = NULL; | |
203d3d4a ZR |
1274 | |
1275 | if (!tz) | |
1276 | return; | |
1277 | ||
7e8ee1e9 D |
1278 | tzp = tz->tzp; |
1279 | ||
203d3d4a ZR |
1280 | mutex_lock(&thermal_list_lock); |
1281 | list_for_each_entry(pos, &thermal_tz_list, node) | |
b659a30d EV |
1282 | if (pos == tz) |
1283 | break; | |
203d3d4a ZR |
1284 | if (pos != tz) { |
1285 | /* thermal zone device not found */ | |
1286 | mutex_unlock(&thermal_list_lock); | |
1287 | return; | |
1288 | } | |
1289 | list_del(&tz->node); | |
7e8ee1e9 D |
1290 | |
1291 | /* Unbind all cdevs associated with 'this' thermal zone */ | |
1292 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
1293 | if (tz->ops->unbind) { | |
1294 | tz->ops->unbind(tz, cdev); | |
1295 | continue; | |
1296 | } | |
1297 | ||
1298 | if (!tzp || !tzp->tbp) | |
1299 | break; | |
1300 | ||
1301 | for (i = 0; i < tzp->num_tbps; i++) { | |
1302 | if (tzp->tbp[i].cdev == cdev) { | |
1303 | __unbind(tz, tzp->tbp[i].trip_mask, cdev); | |
1304 | tzp->tbp[i].cdev = NULL; | |
1305 | } | |
1306 | } | |
1307 | } | |
1308 | ||
203d3d4a ZR |
1309 | mutex_unlock(&thermal_list_lock); |
1310 | ||
b1569e99 MG |
1311 | thermal_zone_device_set_polling(tz, 0); |
1312 | ||
e33df1d2 | 1313 | thermal_set_governor(tz, NULL); |
203d3d4a | 1314 | |
e68b16ab | 1315 | thermal_remove_hwmon_sysfs(tz); |
203d3d4a ZR |
1316 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1317 | idr_destroy(&tz->idr); | |
1318 | mutex_destroy(&tz->lock); | |
1319 | device_unregister(&tz->device); | |
203d3d4a | 1320 | } |
910cb1e3 | 1321 | EXPORT_SYMBOL_GPL(thermal_zone_device_unregister); |
203d3d4a | 1322 | |
63c4d919 EV |
1323 | /** |
1324 | * thermal_zone_get_zone_by_name() - search for a zone and returns its ref | |
1325 | * @name: thermal zone name to fetch the temperature | |
1326 | * | |
1327 | * When only one zone is found with the passed name, returns a reference to it. | |
1328 | * | |
1329 | * Return: On success returns a reference to an unique thermal zone with | |
1330 | * matching name equals to @name, an ERR_PTR otherwise (-EINVAL for invalid | |
1331 | * paramenters, -ENODEV for not found and -EEXIST for multiple matches). | |
1332 | */ | |
1333 | struct thermal_zone_device *thermal_zone_get_zone_by_name(const char *name) | |
1334 | { | |
1335 | struct thermal_zone_device *pos = NULL, *ref = ERR_PTR(-EINVAL); | |
1336 | unsigned int found = 0; | |
1337 | ||
1338 | if (!name) | |
1339 | goto exit; | |
1340 | ||
1341 | mutex_lock(&thermal_list_lock); | |
1342 | list_for_each_entry(pos, &thermal_tz_list, node) | |
484ac2f3 | 1343 | if (!strncasecmp(name, pos->type, THERMAL_NAME_LENGTH)) { |
63c4d919 EV |
1344 | found++; |
1345 | ref = pos; | |
1346 | } | |
1347 | mutex_unlock(&thermal_list_lock); | |
1348 | ||
1349 | /* nothing has been found, thus an error code for it */ | |
1350 | if (found == 0) | |
1351 | ref = ERR_PTR(-ENODEV); | |
1352 | else if (found > 1) | |
1353 | /* Success only when an unique zone is found */ | |
1354 | ref = ERR_PTR(-EEXIST); | |
1355 | ||
1356 | exit: | |
1357 | return ref; | |
1358 | } | |
1359 | EXPORT_SYMBOL_GPL(thermal_zone_get_zone_by_name); | |
1360 | ||
af06216a | 1361 | #ifdef CONFIG_NET |
2a94fe48 JB |
1362 | static const struct genl_multicast_group thermal_event_mcgrps[] = { |
1363 | { .name = THERMAL_GENL_MCAST_GROUP_NAME, }, | |
1364 | }; | |
1365 | ||
56989f6d | 1366 | static struct genl_family thermal_event_genl_family __ro_after_init = { |
489111e5 | 1367 | .module = THIS_MODULE, |
af06216a RW |
1368 | .name = THERMAL_GENL_FAMILY_NAME, |
1369 | .version = THERMAL_GENL_VERSION, | |
1370 | .maxattr = THERMAL_GENL_ATTR_MAX, | |
2a94fe48 JB |
1371 | .mcgrps = thermal_event_mcgrps, |
1372 | .n_mcgrps = ARRAY_SIZE(thermal_event_mcgrps), | |
af06216a RW |
1373 | }; |
1374 | ||
8ab3e6a0 | 1375 | int thermal_generate_netlink_event(struct thermal_zone_device *tz, |
eb7be329 | 1376 | enum events event) |
4cb18728 D |
1377 | { |
1378 | struct sk_buff *skb; | |
1379 | struct nlattr *attr; | |
1380 | struct thermal_genl_event *thermal_event; | |
1381 | void *msg_header; | |
1382 | int size; | |
1383 | int result; | |
b11de07c | 1384 | static unsigned int thermal_event_seqnum; |
4cb18728 | 1385 | |
8ab3e6a0 EV |
1386 | if (!tz) |
1387 | return -EINVAL; | |
1388 | ||
4cb18728 | 1389 | /* allocate memory */ |
886ee546 JP |
1390 | size = nla_total_size(sizeof(struct thermal_genl_event)) + |
1391 | nla_total_size(0); | |
4cb18728 D |
1392 | |
1393 | skb = genlmsg_new(size, GFP_ATOMIC); | |
1394 | if (!skb) | |
1395 | return -ENOMEM; | |
1396 | ||
1397 | /* add the genetlink message header */ | |
1398 | msg_header = genlmsg_put(skb, 0, thermal_event_seqnum++, | |
1399 | &thermal_event_genl_family, 0, | |
1400 | THERMAL_GENL_CMD_EVENT); | |
1401 | if (!msg_header) { | |
1402 | nlmsg_free(skb); | |
1403 | return -ENOMEM; | |
1404 | } | |
1405 | ||
1406 | /* fill the data */ | |
886ee546 JP |
1407 | attr = nla_reserve(skb, THERMAL_GENL_ATTR_EVENT, |
1408 | sizeof(struct thermal_genl_event)); | |
4cb18728 D |
1409 | |
1410 | if (!attr) { | |
1411 | nlmsg_free(skb); | |
1412 | return -EINVAL; | |
1413 | } | |
1414 | ||
1415 | thermal_event = nla_data(attr); | |
1416 | if (!thermal_event) { | |
1417 | nlmsg_free(skb); | |
1418 | return -EINVAL; | |
1419 | } | |
1420 | ||
1421 | memset(thermal_event, 0, sizeof(struct thermal_genl_event)); | |
1422 | ||
8ab3e6a0 | 1423 | thermal_event->orig = tz->id; |
4cb18728 D |
1424 | thermal_event->event = event; |
1425 | ||
1426 | /* send multicast genetlink message */ | |
053c095a | 1427 | genlmsg_end(skb, msg_header); |
4cb18728 | 1428 | |
68eb5503 | 1429 | result = genlmsg_multicast(&thermal_event_genl_family, skb, 0, |
2a94fe48 | 1430 | 0, GFP_ATOMIC); |
4cb18728 | 1431 | if (result) |
923e0b1e | 1432 | dev_err(&tz->device, "Failed to send netlink event:%d", result); |
4cb18728 D |
1433 | |
1434 | return result; | |
1435 | } | |
910cb1e3 | 1436 | EXPORT_SYMBOL_GPL(thermal_generate_netlink_event); |
4cb18728 | 1437 | |
56989f6d | 1438 | static int __init genetlink_init(void) |
4cb18728 | 1439 | { |
2a94fe48 | 1440 | return genl_register_family(&thermal_event_genl_family); |
4cb18728 D |
1441 | } |
1442 | ||
af06216a RW |
1443 | static void genetlink_exit(void) |
1444 | { | |
1445 | genl_unregister_family(&thermal_event_genl_family); | |
1446 | } | |
1447 | #else /* !CONFIG_NET */ | |
1448 | static inline int genetlink_init(void) { return 0; } | |
1449 | static inline void genetlink_exit(void) {} | |
1450 | #endif /* !CONFIG_NET */ | |
1451 | ||
ff140fea | 1452 | static int thermal_pm_notify(struct notifier_block *nb, |
eb7be329 | 1453 | unsigned long mode, void *_unused) |
ff140fea ZR |
1454 | { |
1455 | struct thermal_zone_device *tz; | |
1456 | ||
1457 | switch (mode) { | |
1458 | case PM_HIBERNATION_PREPARE: | |
1459 | case PM_RESTORE_PREPARE: | |
1460 | case PM_SUSPEND_PREPARE: | |
1461 | atomic_set(&in_suspend, 1); | |
1462 | break; | |
1463 | case PM_POST_HIBERNATION: | |
1464 | case PM_POST_RESTORE: | |
1465 | case PM_POST_SUSPEND: | |
1466 | atomic_set(&in_suspend, 0); | |
1467 | list_for_each_entry(tz, &thermal_tz_list, node) { | |
1468 | thermal_zone_device_reset(tz); | |
0e70f466 SP |
1469 | thermal_zone_device_update(tz, |
1470 | THERMAL_EVENT_UNSPECIFIED); | |
ff140fea ZR |
1471 | } |
1472 | break; | |
1473 | default: | |
1474 | break; | |
1475 | } | |
1476 | return 0; | |
1477 | } | |
1478 | ||
1479 | static struct notifier_block thermal_pm_nb = { | |
1480 | .notifier_call = thermal_pm_notify, | |
1481 | }; | |
1482 | ||
203d3d4a ZR |
1483 | static int __init thermal_init(void) |
1484 | { | |
80a26a5c ZR |
1485 | int result; |
1486 | ||
1487 | result = thermal_register_governors(); | |
1488 | if (result) | |
1489 | goto error; | |
203d3d4a ZR |
1490 | |
1491 | result = class_register(&thermal_class); | |
80a26a5c ZR |
1492 | if (result) |
1493 | goto unregister_governors; | |
1494 | ||
4cb18728 | 1495 | result = genetlink_init(); |
80a26a5c ZR |
1496 | if (result) |
1497 | goto unregister_class; | |
1498 | ||
4e5e4705 EV |
1499 | result = of_parse_thermal_zones(); |
1500 | if (result) | |
1501 | goto exit_netlink; | |
1502 | ||
ff140fea ZR |
1503 | result = register_pm_notifier(&thermal_pm_nb); |
1504 | if (result) | |
1505 | pr_warn("Thermal: Can not register suspend notifier, return %d\n", | |
1506 | result); | |
1507 | ||
80a26a5c ZR |
1508 | return 0; |
1509 | ||
4e5e4705 EV |
1510 | exit_netlink: |
1511 | genetlink_exit(); | |
80a26a5c ZR |
1512 | unregister_class: |
1513 | class_unregister(&thermal_class); | |
9d367e5e LH |
1514 | unregister_governors: |
1515 | thermal_unregister_governors(); | |
80a26a5c ZR |
1516 | error: |
1517 | idr_destroy(&thermal_tz_idr); | |
1518 | idr_destroy(&thermal_cdev_idr); | |
1519 | mutex_destroy(&thermal_idr_lock); | |
1520 | mutex_destroy(&thermal_list_lock); | |
1521 | mutex_destroy(&thermal_governor_lock); | |
203d3d4a ZR |
1522 | return result; |
1523 | } | |
1524 | ||
1525 | static void __exit thermal_exit(void) | |
1526 | { | |
ff140fea | 1527 | unregister_pm_notifier(&thermal_pm_nb); |
4e5e4705 | 1528 | of_thermal_destroy_zones(); |
80a26a5c | 1529 | genetlink_exit(); |
203d3d4a | 1530 | class_unregister(&thermal_class); |
80a26a5c | 1531 | thermal_unregister_governors(); |
203d3d4a ZR |
1532 | idr_destroy(&thermal_tz_idr); |
1533 | idr_destroy(&thermal_cdev_idr); | |
1534 | mutex_destroy(&thermal_idr_lock); | |
1535 | mutex_destroy(&thermal_list_lock); | |
80a26a5c | 1536 | mutex_destroy(&thermal_governor_lock); |
203d3d4a ZR |
1537 | } |
1538 | ||
4cb18728 | 1539 | fs_initcall(thermal_init); |
203d3d4a | 1540 | module_exit(thermal_exit); |