Commit | Line | Data |
---|---|---|
7e3c0381 | 1 | // SPDX-License-Identifier: GPL-2.0 |
203d3d4a ZR |
2 | /* |
3 | * thermal.c - Generic Thermal Management Sysfs support. | |
4 | * | |
5 | * Copyright (C) 2008 Intel Corp | |
6 | * Copyright (C) 2008 Zhang Rui <rui.zhang@intel.com> | |
7 | * Copyright (C) 2008 Sujith Thomas <sujith.thomas@intel.com> | |
203d3d4a ZR |
8 | */ |
9 | ||
c5a01dd5 JP |
10 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
11 | ||
203d3d4a ZR |
12 | #include <linux/device.h> |
13 | #include <linux/err.h> | |
3f0cfea3 | 14 | #include <linux/export.h> |
5a0e3ad6 | 15 | #include <linux/slab.h> |
203d3d4a ZR |
16 | #include <linux/kdev_t.h> |
17 | #include <linux/idr.h> | |
18 | #include <linux/thermal.h> | |
b1569e99 | 19 | #include <linux/reboot.h> |
42a5bf50 | 20 | #include <linux/string.h> |
a116b5d4 | 21 | #include <linux/of.h> |
ff140fea | 22 | #include <linux/suspend.h> |
203d3d4a | 23 | |
100a8fdb PA |
24 | #define CREATE_TRACE_POINTS |
25 | #include <trace/events/thermal.h> | |
26 | ||
71350db4 | 27 | #include "thermal_core.h" |
0dd88793 | 28 | #include "thermal_hwmon.h" |
71350db4 | 29 | |
b31ef828 MW |
30 | static DEFINE_IDA(thermal_tz_ida); |
31 | static DEFINE_IDA(thermal_cdev_ida); | |
203d3d4a ZR |
32 | |
33 | static LIST_HEAD(thermal_tz_list); | |
34 | static LIST_HEAD(thermal_cdev_list); | |
a4a15485 D |
35 | static LIST_HEAD(thermal_governor_list); |
36 | ||
203d3d4a | 37 | static DEFINE_MUTEX(thermal_list_lock); |
a4a15485 D |
38 | static DEFINE_MUTEX(thermal_governor_lock); |
39 | ||
ff140fea ZR |
40 | static atomic_t in_suspend; |
41 | ||
f2234bcd ZR |
42 | static struct thermal_governor *def_governor; |
43 | ||
1b4f4849 EV |
44 | /* |
45 | * Governor section: set of functions to handle thermal governors | |
46 | * | |
47 | * Functions to help in the life cycle of thermal governors within | |
48 | * the thermal core and by the thermal governor code. | |
49 | */ | |
50 | ||
a4a15485 D |
51 | static struct thermal_governor *__find_governor(const char *name) |
52 | { | |
53 | struct thermal_governor *pos; | |
54 | ||
f2234bcd ZR |
55 | if (!name || !name[0]) |
56 | return def_governor; | |
57 | ||
a4a15485 | 58 | list_for_each_entry(pos, &thermal_governor_list, governor_list) |
484ac2f3 | 59 | if (!strncasecmp(name, pos->name, THERMAL_NAME_LENGTH)) |
a4a15485 D |
60 | return pos; |
61 | ||
62 | return NULL; | |
63 | } | |
64 | ||
e33df1d2 JM |
65 | /** |
66 | * bind_previous_governor() - bind the previous governor of the thermal zone | |
67 | * @tz: a valid pointer to a struct thermal_zone_device | |
68 | * @failed_gov_name: the name of the governor that failed to register | |
69 | * | |
70 | * Register the previous governor of the thermal zone after a new | |
71 | * governor has failed to be bound. | |
72 | */ | |
73 | static void bind_previous_governor(struct thermal_zone_device *tz, | |
74 | const char *failed_gov_name) | |
75 | { | |
76 | if (tz->governor && tz->governor->bind_to_tz) { | |
77 | if (tz->governor->bind_to_tz(tz)) { | |
78 | dev_err(&tz->device, | |
79 | "governor %s failed to bind and the previous one (%s) failed to bind again, thermal zone %s has no governor\n", | |
80 | failed_gov_name, tz->governor->name, tz->type); | |
81 | tz->governor = NULL; | |
82 | } | |
83 | } | |
84 | } | |
85 | ||
86 | /** | |
87 | * thermal_set_governor() - Switch to another governor | |
88 | * @tz: a valid pointer to a struct thermal_zone_device | |
89 | * @new_gov: pointer to the new governor | |
90 | * | |
91 | * Change the governor of thermal zone @tz. | |
92 | * | |
93 | * Return: 0 on success, an error if the new governor's bind_to_tz() failed. | |
94 | */ | |
95 | static int thermal_set_governor(struct thermal_zone_device *tz, | |
96 | struct thermal_governor *new_gov) | |
97 | { | |
98 | int ret = 0; | |
99 | ||
100 | if (tz->governor && tz->governor->unbind_from_tz) | |
101 | tz->governor->unbind_from_tz(tz); | |
102 | ||
103 | if (new_gov && new_gov->bind_to_tz) { | |
104 | ret = new_gov->bind_to_tz(tz); | |
105 | if (ret) { | |
106 | bind_previous_governor(tz, new_gov->name); | |
107 | ||
108 | return ret; | |
109 | } | |
110 | } | |
111 | ||
112 | tz->governor = new_gov; | |
113 | ||
114 | return ret; | |
115 | } | |
116 | ||
a4a15485 D |
117 | int thermal_register_governor(struct thermal_governor *governor) |
118 | { | |
119 | int err; | |
120 | const char *name; | |
121 | struct thermal_zone_device *pos; | |
122 | ||
123 | if (!governor) | |
124 | return -EINVAL; | |
125 | ||
126 | mutex_lock(&thermal_governor_lock); | |
127 | ||
128 | err = -EBUSY; | |
5027ba36 | 129 | if (!__find_governor(governor->name)) { |
eb7be329 EV |
130 | bool match_default; |
131 | ||
a4a15485 D |
132 | err = 0; |
133 | list_add(&governor->governor_list, &thermal_governor_list); | |
eb7be329 EV |
134 | match_default = !strncmp(governor->name, |
135 | DEFAULT_THERMAL_GOVERNOR, | |
136 | THERMAL_NAME_LENGTH); | |
137 | ||
138 | if (!def_governor && match_default) | |
f2234bcd | 139 | def_governor = governor; |
a4a15485 D |
140 | } |
141 | ||
142 | mutex_lock(&thermal_list_lock); | |
143 | ||
144 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
f2234bcd ZR |
145 | /* |
146 | * only thermal zones with specified tz->tzp->governor_name | |
147 | * may run with tz->govenor unset | |
148 | */ | |
a4a15485 D |
149 | if (pos->governor) |
150 | continue; | |
f2234bcd ZR |
151 | |
152 | name = pos->tzp->governor_name; | |
153 | ||
e33df1d2 JM |
154 | if (!strncasecmp(name, governor->name, THERMAL_NAME_LENGTH)) { |
155 | int ret; | |
156 | ||
157 | ret = thermal_set_governor(pos, governor); | |
158 | if (ret) | |
159 | dev_err(&pos->device, | |
160 | "Failed to set governor %s for thermal zone %s: %d\n", | |
161 | governor->name, pos->type, ret); | |
162 | } | |
a4a15485 D |
163 | } |
164 | ||
165 | mutex_unlock(&thermal_list_lock); | |
166 | mutex_unlock(&thermal_governor_lock); | |
167 | ||
168 | return err; | |
169 | } | |
a4a15485 D |
170 | |
171 | void thermal_unregister_governor(struct thermal_governor *governor) | |
172 | { | |
173 | struct thermal_zone_device *pos; | |
174 | ||
175 | if (!governor) | |
176 | return; | |
177 | ||
178 | mutex_lock(&thermal_governor_lock); | |
179 | ||
5027ba36 | 180 | if (!__find_governor(governor->name)) |
a4a15485 D |
181 | goto exit; |
182 | ||
183 | mutex_lock(&thermal_list_lock); | |
184 | ||
185 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
484ac2f3 | 186 | if (!strncasecmp(pos->governor->name, governor->name, |
eb7be329 | 187 | THERMAL_NAME_LENGTH)) |
e33df1d2 | 188 | thermal_set_governor(pos, NULL); |
a4a15485 D |
189 | } |
190 | ||
191 | mutex_unlock(&thermal_list_lock); | |
192 | list_del(&governor->governor_list); | |
193 | exit: | |
194 | mutex_unlock(&thermal_governor_lock); | |
9b4298a0 | 195 | } |
9b4298a0 | 196 | |
1b4f4849 EV |
197 | int thermal_zone_device_set_policy(struct thermal_zone_device *tz, |
198 | char *policy) | |
9b4298a0 | 199 | { |
1b4f4849 EV |
200 | struct thermal_governor *gov; |
201 | int ret = -EINVAL; | |
9b4298a0 | 202 | |
1b4f4849 | 203 | mutex_lock(&thermal_governor_lock); |
9b4298a0 | 204 | mutex_lock(&tz->lock); |
9b4298a0 | 205 | |
1b4f4849 EV |
206 | gov = __find_governor(strim(policy)); |
207 | if (!gov) | |
208 | goto exit; | |
9b4298a0 | 209 | |
1b4f4849 | 210 | ret = thermal_set_governor(tz, gov); |
9b4298a0 | 211 | |
1b4f4849 EV |
212 | exit: |
213 | mutex_unlock(&tz->lock); | |
214 | mutex_unlock(&thermal_governor_lock); | |
9b4298a0 | 215 | |
55cdf0a2 DL |
216 | thermal_notify_tz_gov_change(tz->id, policy); |
217 | ||
1b4f4849 | 218 | return ret; |
7e8ee1e9 D |
219 | } |
220 | ||
1b4f4849 | 221 | int thermal_build_list_of_policies(char *buf) |
7e8ee1e9 | 222 | { |
1b4f4849 EV |
223 | struct thermal_governor *pos; |
224 | ssize_t count = 0; | |
7e8ee1e9 | 225 | |
1b4f4849 | 226 | mutex_lock(&thermal_governor_lock); |
a8892d83 | 227 | |
1b4f4849 | 228 | list_for_each_entry(pos, &thermal_governor_list, governor_list) { |
1bb30b20 DC |
229 | count += scnprintf(buf + count, PAGE_SIZE - count, "%s ", |
230 | pos->name); | |
7e8ee1e9 | 231 | } |
1bb30b20 | 232 | count += scnprintf(buf + count, PAGE_SIZE - count, "\n"); |
7e8ee1e9 | 233 | |
1b4f4849 | 234 | mutex_unlock(&thermal_governor_lock); |
7e8ee1e9 | 235 | |
1b4f4849 | 236 | return count; |
7e8ee1e9 D |
237 | } |
238 | ||
57c5b2ec | 239 | static void __init thermal_unregister_governors(void) |
7e8ee1e9 | 240 | { |
57c5b2ec DL |
241 | struct thermal_governor **governor; |
242 | ||
243 | for_each_governor_table(governor) | |
244 | thermal_unregister_governor(*governor); | |
245 | } | |
7e8ee1e9 | 246 | |
57c5b2ec DL |
247 | static int __init thermal_register_governors(void) |
248 | { | |
249 | int ret = 0; | |
250 | struct thermal_governor **governor; | |
7e8ee1e9 | 251 | |
57c5b2ec DL |
252 | for_each_governor_table(governor) { |
253 | ret = thermal_register_governor(*governor); | |
254 | if (ret) { | |
255 | pr_err("Failed to register governor: '%s'", | |
256 | (*governor)->name); | |
257 | break; | |
258 | } | |
7e8ee1e9 | 259 | |
57c5b2ec DL |
260 | pr_info("Registered thermal governor '%s'", |
261 | (*governor)->name); | |
262 | } | |
7e8ee1e9 | 263 | |
57c5b2ec DL |
264 | if (ret) { |
265 | struct thermal_governor **gov; | |
7e8ee1e9 | 266 | |
57c5b2ec DL |
267 | for_each_governor_table(gov) { |
268 | if (gov == governor) | |
269 | break; | |
270 | thermal_unregister_governor(*gov); | |
271 | } | |
272 | } | |
7e8ee1e9 | 273 | |
57c5b2ec | 274 | return ret; |
7e8ee1e9 D |
275 | } |
276 | ||
8772e185 EV |
277 | /* |
278 | * Zone update section: main control loop applied to each zone while monitoring | |
279 | * | |
280 | * in polling mode. The monitoring is done using a workqueue. | |
281 | * Same update may be done on a zone by calling thermal_zone_device_update(). | |
282 | * | |
283 | * An update means: | |
284 | * - Non-critical trips will invoke the governor responsible for that zone; | |
285 | * - Hot trips will produce a notification to userspace; | |
286 | * - Critical trip point will cause a system shutdown. | |
287 | */ | |
0c01ebbf | 288 | static void thermal_zone_device_set_polling(struct thermal_zone_device *tz, |
39a38808 | 289 | unsigned long delay) |
0c01ebbf | 290 | { |
39a38808 | 291 | if (delay) |
c2b59d27 | 292 | mod_delayed_work(system_freezable_power_efficient_wq, |
39a38808 | 293 | &tz->poll_queue, delay); |
0c01ebbf | 294 | else |
163b00cd | 295 | cancel_delayed_work(&tz->poll_queue); |
0c01ebbf D |
296 | } |
297 | ||
298 | static void monitor_thermal_zone(struct thermal_zone_device *tz) | |
299 | { | |
15a73839 DL |
300 | if (tz->mode != THERMAL_DEVICE_ENABLED) |
301 | thermal_zone_device_set_polling(tz, 0); | |
302 | else if (tz->passive) | |
39a38808 | 303 | thermal_zone_device_set_polling(tz, tz->passive_delay_jiffies); |
15a73839 | 304 | else if (tz->polling_delay_jiffies) |
39a38808 | 305 | thermal_zone_device_set_polling(tz, tz->polling_delay_jiffies); |
0c01ebbf D |
306 | } |
307 | ||
5be52fcc | 308 | static void handle_non_critical_trips(struct thermal_zone_device *tz, int trip) |
0c01ebbf | 309 | { |
f2234bcd ZR |
310 | tz->governor ? tz->governor->throttle(tz, trip) : |
311 | def_governor->throttle(tz, trip); | |
0c01ebbf D |
312 | } |
313 | ||
db0aeb4f | 314 | void thermal_zone_device_critical(struct thermal_zone_device *tz) |
ef1d87e0 | 315 | { |
ef1d87e0 K |
316 | /* |
317 | * poweroff_delay_ms must be a carefully profiled positive value. | |
db0aeb4f | 318 | * Its a must for forced_emergency_poweroff_work to be scheduled. |
ef1d87e0 | 319 | */ |
db0aeb4f | 320 | int poweroff_delay_ms = CONFIG_THERMAL_EMERGENCY_POWEROFF_DELAY_MS; |
ef1d87e0 | 321 | |
d7203eed DL |
322 | dev_emerg(&tz->device, "%s: critical temperature reached, " |
323 | "shutting down\n", tz->type); | |
324 | ||
db0aeb4f | 325 | hw_protection_shutdown("Temperature too high", poweroff_delay_ms); |
d7203eed DL |
326 | } |
327 | EXPORT_SYMBOL(thermal_zone_device_critical); | |
328 | ||
0c01ebbf | 329 | static void handle_critical_trips(struct thermal_zone_device *tz, |
50e53291 | 330 | int trip, int trip_temp, enum thermal_trip_type trip_type) |
0c01ebbf | 331 | { |
0c01ebbf | 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 | ||
d7203eed DL |
338 | if (trip_type == THERMAL_TRIP_HOT && tz->ops->hot) |
339 | tz->ops->hot(tz); | |
340 | else if (trip_type == THERMAL_TRIP_CRITICAL) | |
341 | tz->ops->critical(tz); | |
0c01ebbf D |
342 | } |
343 | ||
344 | static void handle_thermal_trip(struct thermal_zone_device *tz, int trip) | |
345 | { | |
346 | enum thermal_trip_type type; | |
55cdf0a2 | 347 | int trip_temp, hyst = 0; |
0c01ebbf | 348 | |
81ad4276 ZR |
349 | /* Ignore disabled trip points */ |
350 | if (test_bit(trip, &tz->trips_disabled)) | |
351 | return; | |
352 | ||
55cdf0a2 | 353 | tz->ops->get_trip_temp(tz, trip, &trip_temp); |
0c01ebbf | 354 | tz->ops->get_trip_type(tz, trip, &type); |
55cdf0a2 DL |
355 | if (tz->ops->get_trip_hyst) |
356 | tz->ops->get_trip_hyst(tz, trip, &hyst); | |
357 | ||
358 | if (tz->last_temperature != THERMAL_TEMP_INVALID) { | |
359 | if (tz->last_temperature < trip_temp && | |
360 | tz->temperature >= trip_temp) | |
fc656fa1 DL |
361 | thermal_notify_tz_trip_up(tz->id, trip, |
362 | tz->temperature); | |
55cdf0a2 DL |
363 | if (tz->last_temperature >= trip_temp && |
364 | tz->temperature < (trip_temp - hyst)) | |
fc656fa1 DL |
365 | thermal_notify_tz_trip_down(tz->id, trip, |
366 | tz->temperature); | |
55cdf0a2 | 367 | } |
0c01ebbf D |
368 | |
369 | if (type == THERMAL_TRIP_CRITICAL || type == THERMAL_TRIP_HOT) | |
50e53291 | 370 | handle_critical_trips(tz, trip, trip_temp, type); |
0c01ebbf | 371 | else |
5be52fcc | 372 | handle_non_critical_trips(tz, trip); |
0c01ebbf D |
373 | } |
374 | ||
375 | static void update_temperature(struct thermal_zone_device *tz) | |
376 | { | |
17e8351a | 377 | int temp, ret; |
0c01ebbf | 378 | |
a930da9b | 379 | ret = __thermal_zone_get_temp(tz, &temp); |
0c01ebbf | 380 | if (ret) { |
7e497a73 HG |
381 | if (ret != -EAGAIN) |
382 | dev_warn(&tz->device, | |
383 | "failed to read out thermal zone (%d)\n", | |
384 | ret); | |
e6e238c3 | 385 | return; |
0c01ebbf D |
386 | } |
387 | ||
388 | tz->last_temperature = tz->temperature; | |
389 | tz->temperature = temp; | |
06475b55 | 390 | |
100a8fdb | 391 | trace_thermal_temperature(tz); |
55cdf0a2 DL |
392 | |
393 | thermal_genl_sampling_temp(tz->id, temp); | |
bb431ba2 ZR |
394 | } |
395 | ||
964f4843 | 396 | static void thermal_zone_device_init(struct thermal_zone_device *tz) |
bb431ba2 ZR |
397 | { |
398 | struct thermal_instance *pos; | |
bb431ba2 | 399 | tz->temperature = THERMAL_TEMP_INVALID; |
99b63316 MMP |
400 | tz->prev_low_trip = -INT_MAX; |
401 | tz->prev_high_trip = INT_MAX; | |
bb431ba2 ZR |
402 | list_for_each_entry(pos, &tz->thermal_instances, tz_node) |
403 | pos->initialized = false; | |
0c01ebbf D |
404 | } |
405 | ||
ac5d9ecc AP |
406 | static int thermal_zone_device_set_mode(struct thermal_zone_device *tz, |
407 | enum thermal_device_mode mode) | |
408 | { | |
409 | int ret = 0; | |
410 | ||
411 | mutex_lock(&tz->lock); | |
412 | ||
413 | /* do nothing if mode isn't changing */ | |
414 | if (mode == tz->mode) { | |
415 | mutex_unlock(&tz->lock); | |
416 | ||
417 | return ret; | |
418 | } | |
419 | ||
f5e50bf4 AP |
420 | if (tz->ops->change_mode) |
421 | ret = tz->ops->change_mode(tz, mode); | |
ac5d9ecc AP |
422 | |
423 | if (!ret) | |
424 | tz->mode = mode; | |
425 | ||
426 | mutex_unlock(&tz->lock); | |
427 | ||
428 | thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED); | |
429 | ||
25be77e5 DL |
430 | if (mode == THERMAL_DEVICE_ENABLED) |
431 | thermal_notify_tz_enable(tz->id); | |
432 | else | |
433 | thermal_notify_tz_disable(tz->id); | |
434 | ||
ac5d9ecc AP |
435 | return ret; |
436 | } | |
437 | ||
438 | int thermal_zone_device_enable(struct thermal_zone_device *tz) | |
439 | { | |
440 | return thermal_zone_device_set_mode(tz, THERMAL_DEVICE_ENABLED); | |
441 | } | |
442 | EXPORT_SYMBOL_GPL(thermal_zone_device_enable); | |
443 | ||
444 | int thermal_zone_device_disable(struct thermal_zone_device *tz) | |
445 | { | |
446 | return thermal_zone_device_set_mode(tz, THERMAL_DEVICE_DISABLED); | |
447 | } | |
448 | EXPORT_SYMBOL_GPL(thermal_zone_device_disable); | |
449 | ||
450 | int thermal_zone_device_is_enabled(struct thermal_zone_device *tz) | |
451 | { | |
a930da9b | 452 | lockdep_assert_held(&tz->lock); |
ac5d9ecc | 453 | |
a930da9b | 454 | return tz->mode == THERMAL_DEVICE_ENABLED; |
ac5d9ecc | 455 | } |
ac5d9ecc | 456 | |
0e70f466 SP |
457 | void thermal_zone_device_update(struct thermal_zone_device *tz, |
458 | enum thermal_notify_event event) | |
0c01ebbf D |
459 | { |
460 | int count; | |
461 | ||
ff140fea ZR |
462 | if (atomic_read(&in_suspend)) |
463 | return; | |
464 | ||
433178e7 DL |
465 | if (WARN_ONCE(!tz->ops->get_temp, "'%s' must not be called without " |
466 | "'get_temp' ops set\n", __func__)) | |
81bd4e1c EV |
467 | return; |
468 | ||
a930da9b DL |
469 | mutex_lock(&tz->lock); |
470 | ||
471 | if (!thermal_zone_device_is_enabled(tz)) | |
472 | goto out; | |
473 | ||
0c01ebbf D |
474 | update_temperature(tz); |
475 | ||
a930da9b | 476 | __thermal_zone_set_trips(tz); |
060c034a | 477 | |
0e70f466 SP |
478 | tz->notify_event = event; |
479 | ||
e5bfcd30 | 480 | for (count = 0; count < tz->num_trips; count++) |
0c01ebbf | 481 | handle_thermal_trip(tz, count); |
9662756a DL |
482 | |
483 | monitor_thermal_zone(tz); | |
a930da9b DL |
484 | out: |
485 | mutex_unlock(&tz->lock); | |
0c01ebbf | 486 | } |
910cb1e3 | 487 | EXPORT_SYMBOL_GPL(thermal_zone_device_update); |
0c01ebbf D |
488 | |
489 | static void thermal_zone_device_check(struct work_struct *work) | |
490 | { | |
491 | struct thermal_zone_device *tz = container_of(work, struct | |
492 | thermal_zone_device, | |
493 | poll_queue.work); | |
0e70f466 | 494 | thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED); |
0c01ebbf D |
495 | } |
496 | ||
3d44a509 DL |
497 | int for_each_thermal_governor(int (*cb)(struct thermal_governor *, void *), |
498 | void *data) | |
499 | { | |
500 | struct thermal_governor *gov; | |
501 | int ret = 0; | |
502 | ||
503 | mutex_lock(&thermal_governor_lock); | |
504 | list_for_each_entry(gov, &thermal_governor_list, governor_list) { | |
505 | ret = cb(gov, data); | |
506 | if (ret) | |
507 | break; | |
508 | } | |
509 | mutex_unlock(&thermal_governor_lock); | |
510 | ||
511 | return ret; | |
512 | } | |
513 | ||
514 | int for_each_thermal_cooling_device(int (*cb)(struct thermal_cooling_device *, | |
515 | void *), void *data) | |
516 | { | |
517 | struct thermal_cooling_device *cdev; | |
518 | int ret = 0; | |
519 | ||
520 | mutex_lock(&thermal_list_lock); | |
521 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
522 | ret = cb(cdev, data); | |
523 | if (ret) | |
524 | break; | |
525 | } | |
526 | mutex_unlock(&thermal_list_lock); | |
527 | ||
528 | return ret; | |
529 | } | |
530 | ||
531 | int for_each_thermal_zone(int (*cb)(struct thermal_zone_device *, void *), | |
532 | void *data) | |
533 | { | |
534 | struct thermal_zone_device *tz; | |
535 | int ret = 0; | |
536 | ||
537 | mutex_lock(&thermal_list_lock); | |
538 | list_for_each_entry(tz, &thermal_tz_list, node) { | |
539 | ret = cb(tz, data); | |
540 | if (ret) | |
541 | break; | |
542 | } | |
543 | mutex_unlock(&thermal_list_lock); | |
544 | ||
545 | return ret; | |
546 | } | |
547 | ||
329b064f DL |
548 | struct thermal_zone_device *thermal_zone_get_by_id(int id) |
549 | { | |
82aa68af | 550 | struct thermal_zone_device *tz, *match = NULL; |
329b064f DL |
551 | |
552 | mutex_lock(&thermal_list_lock); | |
553 | list_for_each_entry(tz, &thermal_tz_list, node) { | |
82aa68af TR |
554 | if (tz->id == id) { |
555 | match = tz; | |
329b064f | 556 | break; |
82aa68af | 557 | } |
329b064f DL |
558 | } |
559 | mutex_unlock(&thermal_list_lock); | |
560 | ||
82aa68af | 561 | return match; |
329b064f DL |
562 | } |
563 | ||
81193e2e EV |
564 | /* |
565 | * Device management section: cooling devices, zones devices, and binding | |
566 | * | |
567 | * Set of functions provided by the thermal core for: | |
568 | * - cooling devices lifecycle: registration, unregistration, | |
569 | * binding, and unbinding. | |
570 | * - thermal zone devices lifecycle: registration, unregistration, | |
571 | * binding, and unbinding. | |
572 | */ | |
203d3d4a ZR |
573 | |
574 | /** | |
d2e4eb83 EV |
575 | * thermal_zone_bind_cooling_device() - bind a cooling device to a thermal zone |
576 | * @tz: pointer to struct thermal_zone_device | |
203d3d4a ZR |
577 | * @trip: indicates which trip point the cooling devices is |
578 | * associated with in this thermal zone. | |
d2e4eb83 EV |
579 | * @cdev: pointer to struct thermal_cooling_device |
580 | * @upper: the Maximum cooling state for this trip point. | |
581 | * THERMAL_NO_LIMIT means no upper limit, | |
582 | * and the cooling device can be in max_state. | |
583 | * @lower: the Minimum cooling state can be used for this trip point. | |
584 | * THERMAL_NO_LIMIT means no lower limit, | |
585 | * and the cooling device can be in cooling state 0. | |
6cd9e9f6 KS |
586 | * @weight: The weight of the cooling device to be bound to the |
587 | * thermal zone. Use THERMAL_WEIGHT_DEFAULT for the | |
588 | * default value | |
543a9561 | 589 | * |
d2e4eb83 EV |
590 | * This interface function bind a thermal cooling device to the certain trip |
591 | * point of a thermal zone device. | |
543a9561 | 592 | * This function is usually called in the thermal zone device .bind callback. |
d2e4eb83 EV |
593 | * |
594 | * Return: 0 on success, the proper error value otherwise. | |
203d3d4a ZR |
595 | */ |
596 | int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, | |
597 | int trip, | |
9d99842f | 598 | struct thermal_cooling_device *cdev, |
6cd9e9f6 KS |
599 | unsigned long upper, unsigned long lower, |
600 | unsigned int weight) | |
203d3d4a | 601 | { |
b81b6ba3 ZR |
602 | struct thermal_instance *dev; |
603 | struct thermal_instance *pos; | |
c7516709 TS |
604 | struct thermal_zone_device *pos1; |
605 | struct thermal_cooling_device *pos2; | |
c408b3d1 | 606 | int result; |
203d3d4a | 607 | |
e5bfcd30 | 608 | if (trip >= tz->num_trips || trip < 0) |
203d3d4a ZR |
609 | return -EINVAL; |
610 | ||
c7516709 TS |
611 | list_for_each_entry(pos1, &thermal_tz_list, node) { |
612 | if (pos1 == tz) | |
613 | break; | |
614 | } | |
615 | list_for_each_entry(pos2, &thermal_cdev_list, node) { | |
616 | if (pos2 == cdev) | |
617 | break; | |
618 | } | |
619 | ||
620 | if (tz != pos1 || cdev != pos2) | |
203d3d4a ZR |
621 | return -EINVAL; |
622 | ||
9d99842f ZR |
623 | /* lower default 0, upper default max_state */ |
624 | lower = lower == THERMAL_NO_LIMIT ? 0 : lower; | |
c408b3d1 | 625 | upper = upper == THERMAL_NO_LIMIT ? cdev->max_state : upper; |
9d99842f | 626 | |
c408b3d1 | 627 | if (lower > upper || upper > cdev->max_state) |
9d99842f ZR |
628 | return -EINVAL; |
629 | ||
95e3ed15 | 630 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
203d3d4a ZR |
631 | if (!dev) |
632 | return -ENOMEM; | |
633 | dev->tz = tz; | |
634 | dev->cdev = cdev; | |
635 | dev->trip = trip; | |
9d99842f ZR |
636 | dev->upper = upper; |
637 | dev->lower = lower; | |
ce119f83 | 638 | dev->target = THERMAL_NO_TARGET; |
6cd9e9f6 | 639 | dev->weight = weight; |
74051ba5 | 640 | |
5a5b7d8d | 641 | result = ida_alloc(&tz->ida, GFP_KERNEL); |
b31ef828 | 642 | if (result < 0) |
203d3d4a ZR |
643 | goto free_mem; |
644 | ||
b31ef828 | 645 | dev->id = result; |
203d3d4a ZR |
646 | sprintf(dev->name, "cdev%d", dev->id); |
647 | result = | |
648 | sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev->name); | |
649 | if (result) | |
b31ef828 | 650 | goto release_ida; |
203d3d4a ZR |
651 | |
652 | sprintf(dev->attr_name, "cdev%d_trip_point", dev->id); | |
975f8c56 | 653 | sysfs_attr_init(&dev->attr.attr); |
203d3d4a ZR |
654 | dev->attr.attr.name = dev->attr_name; |
655 | dev->attr.attr.mode = 0444; | |
33e678d4 | 656 | dev->attr.show = trip_point_show; |
203d3d4a ZR |
657 | result = device_create_file(&tz->device, &dev->attr); |
658 | if (result) | |
659 | goto remove_symbol_link; | |
660 | ||
db916513 JM |
661 | sprintf(dev->weight_attr_name, "cdev%d_weight", dev->id); |
662 | sysfs_attr_init(&dev->weight_attr.attr); | |
663 | dev->weight_attr.attr.name = dev->weight_attr_name; | |
664 | dev->weight_attr.attr.mode = S_IWUSR | S_IRUGO; | |
33e678d4 VK |
665 | dev->weight_attr.show = weight_show; |
666 | dev->weight_attr.store = weight_store; | |
db916513 JM |
667 | result = device_create_file(&tz->device, &dev->weight_attr); |
668 | if (result) | |
669 | goto remove_trip_file; | |
670 | ||
203d3d4a | 671 | mutex_lock(&tz->lock); |
f4a821ce | 672 | mutex_lock(&cdev->lock); |
cddf31b3 | 673 | list_for_each_entry(pos, &tz->thermal_instances, tz_node) |
b659a30d EV |
674 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
675 | result = -EEXIST; | |
676 | break; | |
677 | } | |
b5e4ae62 | 678 | if (!result) { |
cddf31b3 | 679 | list_add_tail(&dev->tz_node, &tz->thermal_instances); |
b5e4ae62 | 680 | list_add_tail(&dev->cdev_node, &cdev->thermal_instances); |
4511f716 | 681 | atomic_set(&tz->need_update, 1); |
b5e4ae62 | 682 | } |
f4a821ce | 683 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
684 | mutex_unlock(&tz->lock); |
685 | ||
686 | if (!result) | |
687 | return 0; | |
688 | ||
db916513 JM |
689 | device_remove_file(&tz->device, &dev->weight_attr); |
690 | remove_trip_file: | |
203d3d4a | 691 | device_remove_file(&tz->device, &dev->attr); |
caca8b80 | 692 | remove_symbol_link: |
203d3d4a | 693 | sysfs_remove_link(&tz->device.kobj, dev->name); |
b31ef828 | 694 | release_ida: |
5a5b7d8d | 695 | ida_free(&tz->ida, dev->id); |
caca8b80 | 696 | free_mem: |
203d3d4a ZR |
697 | kfree(dev); |
698 | return result; | |
699 | } | |
910cb1e3 | 700 | EXPORT_SYMBOL_GPL(thermal_zone_bind_cooling_device); |
203d3d4a ZR |
701 | |
702 | /** | |
9892e5dc EV |
703 | * thermal_zone_unbind_cooling_device() - unbind a cooling device from a |
704 | * thermal zone. | |
705 | * @tz: pointer to a struct thermal_zone_device. | |
203d3d4a ZR |
706 | * @trip: indicates which trip point the cooling devices is |
707 | * associated with in this thermal zone. | |
9892e5dc | 708 | * @cdev: pointer to a struct thermal_cooling_device. |
543a9561 | 709 | * |
9892e5dc EV |
710 | * This interface function unbind a thermal cooling device from the certain |
711 | * trip point of a thermal zone device. | |
543a9561 | 712 | * This function is usually called in the thermal zone device .unbind callback. |
9892e5dc EV |
713 | * |
714 | * Return: 0 on success, the proper error value otherwise. | |
203d3d4a ZR |
715 | */ |
716 | int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz, | |
717 | int trip, | |
718 | struct thermal_cooling_device *cdev) | |
719 | { | |
b81b6ba3 | 720 | struct thermal_instance *pos, *next; |
203d3d4a ZR |
721 | |
722 | mutex_lock(&tz->lock); | |
f4a821ce | 723 | mutex_lock(&cdev->lock); |
cddf31b3 | 724 | list_for_each_entry_safe(pos, next, &tz->thermal_instances, tz_node) { |
543a9561 | 725 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
cddf31b3 | 726 | list_del(&pos->tz_node); |
b5e4ae62 | 727 | list_del(&pos->cdev_node); |
f4a821ce | 728 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
729 | mutex_unlock(&tz->lock); |
730 | goto unbind; | |
731 | } | |
732 | } | |
f4a821ce | 733 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
734 | mutex_unlock(&tz->lock); |
735 | ||
736 | return -ENODEV; | |
737 | ||
caca8b80 | 738 | unbind: |
528464ea | 739 | device_remove_file(&tz->device, &pos->weight_attr); |
203d3d4a ZR |
740 | device_remove_file(&tz->device, &pos->attr); |
741 | sysfs_remove_link(&tz->device.kobj, pos->name); | |
5a5b7d8d | 742 | ida_free(&tz->ida, pos->id); |
203d3d4a ZR |
743 | kfree(pos); |
744 | return 0; | |
745 | } | |
910cb1e3 | 746 | EXPORT_SYMBOL_GPL(thermal_zone_unbind_cooling_device); |
203d3d4a ZR |
747 | |
748 | static void thermal_release(struct device *dev) | |
749 | { | |
750 | struct thermal_zone_device *tz; | |
751 | struct thermal_cooling_device *cdev; | |
752 | ||
caca8b80 JP |
753 | if (!strncmp(dev_name(dev), "thermal_zone", |
754 | sizeof("thermal_zone") - 1)) { | |
203d3d4a | 755 | tz = to_thermal_zone(dev); |
6a6cd25b | 756 | thermal_zone_destroy_device_groups(tz); |
203d3d4a | 757 | kfree(tz); |
b659a30d EV |
758 | } else if (!strncmp(dev_name(dev), "cooling_device", |
759 | sizeof("cooling_device") - 1)) { | |
203d3d4a ZR |
760 | cdev = to_cooling_device(dev); |
761 | kfree(cdev); | |
762 | } | |
763 | } | |
764 | ||
765 | static struct class thermal_class = { | |
766 | .name = "thermal", | |
767 | .dev_release = thermal_release, | |
768 | }; | |
769 | ||
4b0d3c2d EV |
770 | static inline |
771 | void print_bind_err_msg(struct thermal_zone_device *tz, | |
772 | struct thermal_cooling_device *cdev, int ret) | |
f502ab84 EV |
773 | { |
774 | dev_err(&tz->device, "binding zone %s with cdev %s failed:%d\n", | |
775 | tz->type, cdev->type, ret); | |
776 | } | |
777 | ||
778 | static void __bind(struct thermal_zone_device *tz, int mask, | |
779 | struct thermal_cooling_device *cdev, | |
780 | unsigned long *limits, | |
781 | unsigned int weight) | |
782 | { | |
783 | int i, ret; | |
784 | ||
e5bfcd30 | 785 | for (i = 0; i < tz->num_trips; i++) { |
f502ab84 EV |
786 | if (mask & (1 << i)) { |
787 | unsigned long upper, lower; | |
788 | ||
789 | upper = THERMAL_NO_LIMIT; | |
790 | lower = THERMAL_NO_LIMIT; | |
791 | if (limits) { | |
792 | lower = limits[i * 2]; | |
793 | upper = limits[i * 2 + 1]; | |
794 | } | |
795 | ret = thermal_zone_bind_cooling_device(tz, i, cdev, | |
796 | upper, lower, | |
797 | weight); | |
798 | if (ret) | |
799 | print_bind_err_msg(tz, cdev, ret); | |
800 | } | |
801 | } | |
802 | } | |
803 | ||
949aad83 EV |
804 | static void bind_cdev(struct thermal_cooling_device *cdev) |
805 | { | |
806 | int i, ret; | |
807 | const struct thermal_zone_params *tzp; | |
808 | struct thermal_zone_device *pos = NULL; | |
809 | ||
810 | mutex_lock(&thermal_list_lock); | |
811 | ||
812 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
813 | if (!pos->tzp && !pos->ops->bind) | |
814 | continue; | |
815 | ||
816 | if (pos->ops->bind) { | |
817 | ret = pos->ops->bind(pos, cdev); | |
818 | if (ret) | |
819 | print_bind_err_msg(pos, cdev, ret); | |
820 | continue; | |
821 | } | |
822 | ||
823 | tzp = pos->tzp; | |
824 | if (!tzp || !tzp->tbp) | |
825 | continue; | |
826 | ||
827 | for (i = 0; i < tzp->num_tbps; i++) { | |
828 | if (tzp->tbp[i].cdev || !tzp->tbp[i].match) | |
829 | continue; | |
830 | if (tzp->tbp[i].match(pos, cdev)) | |
831 | continue; | |
832 | tzp->tbp[i].cdev = cdev; | |
833 | __bind(pos, tzp->tbp[i].trip_mask, cdev, | |
834 | tzp->tbp[i].binding_limits, | |
835 | tzp->tbp[i].weight); | |
836 | } | |
837 | } | |
838 | ||
839 | mutex_unlock(&thermal_list_lock); | |
840 | } | |
841 | ||
203d3d4a | 842 | /** |
a116b5d4 EV |
843 | * __thermal_cooling_device_register() - register a new thermal cooling device |
844 | * @np: a pointer to a device tree node. | |
203d3d4a ZR |
845 | * @type: the thermal cooling device type. |
846 | * @devdata: device private data. | |
847 | * @ops: standard thermal cooling devices callbacks. | |
3a6eccb3 EV |
848 | * |
849 | * This interface function adds a new thermal cooling device (fan/processor/...) | |
850 | * to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself | |
851 | * to all the thermal zone devices registered at the same time. | |
a116b5d4 EV |
852 | * It also gives the opportunity to link the cooling device to a device tree |
853 | * node, so that it can be bound to a thermal zone created out of device tree. | |
3a6eccb3 EV |
854 | * |
855 | * Return: a pointer to the created struct thermal_cooling_device or an | |
856 | * ERR_PTR. Caller must check return value with IS_ERR*() helpers. | |
203d3d4a | 857 | */ |
a116b5d4 EV |
858 | static struct thermal_cooling_device * |
859 | __thermal_cooling_device_register(struct device_node *np, | |
f991de53 | 860 | const char *type, void *devdata, |
a116b5d4 | 861 | const struct thermal_cooling_device_ops *ops) |
203d3d4a ZR |
862 | { |
863 | struct thermal_cooling_device *cdev; | |
4511f716 | 864 | struct thermal_zone_device *pos = NULL; |
0a5c2671 | 865 | int id, ret; |
203d3d4a ZR |
866 | |
867 | if (!ops || !ops->get_max_state || !ops->get_cur_state || | |
543a9561 | 868 | !ops->set_cur_state) |
3e6fda5c | 869 | return ERR_PTR(-EINVAL); |
203d3d4a | 870 | |
95e3ed15 | 871 | cdev = kzalloc(sizeof(*cdev), GFP_KERNEL); |
203d3d4a | 872 | if (!cdev) |
3e6fda5c | 873 | return ERR_PTR(-ENOMEM); |
203d3d4a | 874 | |
5a5b7d8d | 875 | ret = ida_alloc(&thermal_cdev_ida, GFP_KERNEL); |
58483761 DL |
876 | if (ret < 0) |
877 | goto out_kfree_cdev; | |
878 | cdev->id = ret; | |
0a5c2671 | 879 | id = ret; |
58483761 | 880 | |
1dd7128b YS |
881 | ret = dev_set_name(&cdev->device, "cooling_device%d", cdev->id); |
882 | if (ret) | |
883 | goto out_ida_remove; | |
884 | ||
58483761 DL |
885 | cdev->type = kstrdup(type ? type : "", GFP_KERNEL); |
886 | if (!cdev->type) { | |
887 | ret = -ENOMEM; | |
888 | goto out_ida_remove; | |
203d3d4a ZR |
889 | } |
890 | ||
f4a821ce | 891 | mutex_init(&cdev->lock); |
b5e4ae62 | 892 | INIT_LIST_HEAD(&cdev->thermal_instances); |
a116b5d4 | 893 | cdev->np = np; |
203d3d4a | 894 | cdev->ops = ops; |
5ca0cce5 | 895 | cdev->updated = false; |
203d3d4a ZR |
896 | cdev->device.class = &thermal_class; |
897 | cdev->devdata = devdata; | |
c408b3d1 VK |
898 | |
899 | if (cdev->ops->get_max_state(cdev, &cdev->max_state)) | |
900 | goto out_kfree_type; | |
901 | ||
8ea22951 | 902 | thermal_cooling_device_setup_sysfs(cdev); |
58483761 DL |
903 | ret = device_register(&cdev->device); |
904 | if (ret) | |
905 | goto out_kfree_type; | |
203d3d4a | 906 | |
7e8ee1e9 | 907 | /* Add 'this' new cdev to the global cdev list */ |
203d3d4a ZR |
908 | mutex_lock(&thermal_list_lock); |
909 | list_add(&cdev->node, &thermal_cdev_list); | |
203d3d4a ZR |
910 | mutex_unlock(&thermal_list_lock); |
911 | ||
7e8ee1e9 D |
912 | /* Update binding information for 'this' new cdev */ |
913 | bind_cdev(cdev); | |
914 | ||
4511f716 CY |
915 | mutex_lock(&thermal_list_lock); |
916 | list_for_each_entry(pos, &thermal_tz_list, node) | |
917 | if (atomic_cmpxchg(&pos->need_update, 1, 0)) | |
0e70f466 SP |
918 | thermal_zone_device_update(pos, |
919 | THERMAL_EVENT_UNSPECIFIED); | |
4511f716 CY |
920 | mutex_unlock(&thermal_list_lock); |
921 | ||
7e8ee1e9 | 922 | return cdev; |
58483761 DL |
923 | |
924 | out_kfree_type: | |
98a160e8 | 925 | thermal_cooling_device_destroy_sysfs(cdev); |
58483761 DL |
926 | kfree(cdev->type); |
927 | put_device(&cdev->device); | |
0a5c2671 | 928 | cdev = NULL; |
58483761 | 929 | out_ida_remove: |
5a5b7d8d | 930 | ida_free(&thermal_cdev_ida, id); |
58483761 | 931 | out_kfree_cdev: |
d44616c6 | 932 | kfree(cdev); |
58483761 | 933 | return ERR_PTR(ret); |
203d3d4a | 934 | } |
a116b5d4 EV |
935 | |
936 | /** | |
937 | * thermal_cooling_device_register() - register a new thermal cooling device | |
938 | * @type: the thermal cooling device type. | |
939 | * @devdata: device private data. | |
940 | * @ops: standard thermal cooling devices callbacks. | |
941 | * | |
942 | * This interface function adds a new thermal cooling device (fan/processor/...) | |
943 | * to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself | |
944 | * to all the thermal zone devices registered at the same time. | |
945 | * | |
946 | * Return: a pointer to the created struct thermal_cooling_device or an | |
947 | * ERR_PTR. Caller must check return value with IS_ERR*() helpers. | |
948 | */ | |
949 | struct thermal_cooling_device * | |
f991de53 | 950 | thermal_cooling_device_register(const char *type, void *devdata, |
a116b5d4 EV |
951 | const struct thermal_cooling_device_ops *ops) |
952 | { | |
953 | return __thermal_cooling_device_register(NULL, type, devdata, ops); | |
954 | } | |
910cb1e3 | 955 | EXPORT_SYMBOL_GPL(thermal_cooling_device_register); |
203d3d4a | 956 | |
a116b5d4 EV |
957 | /** |
958 | * thermal_of_cooling_device_register() - register an OF thermal cooling device | |
959 | * @np: a pointer to a device tree node. | |
960 | * @type: the thermal cooling device type. | |
961 | * @devdata: device private data. | |
962 | * @ops: standard thermal cooling devices callbacks. | |
963 | * | |
964 | * This function will register a cooling device with device tree node reference. | |
965 | * This interface function adds a new thermal cooling device (fan/processor/...) | |
966 | * to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself | |
967 | * to all the thermal zone devices registered at the same time. | |
968 | * | |
969 | * Return: a pointer to the created struct thermal_cooling_device or an | |
970 | * ERR_PTR. Caller must check return value with IS_ERR*() helpers. | |
971 | */ | |
972 | struct thermal_cooling_device * | |
973 | thermal_of_cooling_device_register(struct device_node *np, | |
f991de53 | 974 | const char *type, void *devdata, |
a116b5d4 EV |
975 | const struct thermal_cooling_device_ops *ops) |
976 | { | |
977 | return __thermal_cooling_device_register(np, type, devdata, ops); | |
978 | } | |
979 | EXPORT_SYMBOL_GPL(thermal_of_cooling_device_register); | |
980 | ||
b4ab114c GR |
981 | static void thermal_cooling_device_release(struct device *dev, void *res) |
982 | { | |
983 | thermal_cooling_device_unregister( | |
984 | *(struct thermal_cooling_device **)res); | |
985 | } | |
986 | ||
987 | /** | |
988 | * devm_thermal_of_cooling_device_register() - register an OF thermal cooling | |
989 | * device | |
990 | * @dev: a valid struct device pointer of a sensor device. | |
991 | * @np: a pointer to a device tree node. | |
992 | * @type: the thermal cooling device type. | |
993 | * @devdata: device private data. | |
994 | * @ops: standard thermal cooling devices callbacks. | |
995 | * | |
996 | * This function will register a cooling device with device tree node reference. | |
997 | * This interface function adds a new thermal cooling device (fan/processor/...) | |
998 | * to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself | |
999 | * to all the thermal zone devices registered at the same time. | |
1000 | * | |
1001 | * Return: a pointer to the created struct thermal_cooling_device or an | |
1002 | * ERR_PTR. Caller must check return value with IS_ERR*() helpers. | |
1003 | */ | |
1004 | struct thermal_cooling_device * | |
1005 | devm_thermal_of_cooling_device_register(struct device *dev, | |
1006 | struct device_node *np, | |
1007 | char *type, void *devdata, | |
1008 | const struct thermal_cooling_device_ops *ops) | |
1009 | { | |
1010 | struct thermal_cooling_device **ptr, *tcd; | |
1011 | ||
1012 | ptr = devres_alloc(thermal_cooling_device_release, sizeof(*ptr), | |
1013 | GFP_KERNEL); | |
1014 | if (!ptr) | |
1015 | return ERR_PTR(-ENOMEM); | |
1016 | ||
1017 | tcd = __thermal_cooling_device_register(np, type, devdata, ops); | |
1018 | if (IS_ERR(tcd)) { | |
1019 | devres_free(ptr); | |
1020 | return tcd; | |
1021 | } | |
1022 | ||
1023 | *ptr = tcd; | |
1024 | devres_add(dev, ptr); | |
1025 | ||
1026 | return tcd; | |
1027 | } | |
1028 | EXPORT_SYMBOL_GPL(devm_thermal_of_cooling_device_register); | |
1029 | ||
f11997fa EV |
1030 | static void __unbind(struct thermal_zone_device *tz, int mask, |
1031 | struct thermal_cooling_device *cdev) | |
1032 | { | |
1033 | int i; | |
1034 | ||
e5bfcd30 | 1035 | for (i = 0; i < tz->num_trips; i++) |
f11997fa EV |
1036 | if (mask & (1 << i)) |
1037 | thermal_zone_unbind_cooling_device(tz, i, cdev); | |
1038 | } | |
1039 | ||
203d3d4a | 1040 | /** |
38e7b549 | 1041 | * thermal_cooling_device_unregister - removes a thermal cooling device |
203d3d4a ZR |
1042 | * @cdev: the thermal cooling device to remove. |
1043 | * | |
38e7b549 EV |
1044 | * thermal_cooling_device_unregister() must be called when a registered |
1045 | * thermal cooling device is no longer needed. | |
203d3d4a | 1046 | */ |
7e8ee1e9 | 1047 | void thermal_cooling_device_unregister(struct thermal_cooling_device *cdev) |
203d3d4a | 1048 | { |
7e8ee1e9 D |
1049 | int i; |
1050 | const struct thermal_zone_params *tzp; | |
203d3d4a ZR |
1051 | struct thermal_zone_device *tz; |
1052 | struct thermal_cooling_device *pos = NULL; | |
1053 | ||
1054 | if (!cdev) | |
1055 | return; | |
1056 | ||
1057 | mutex_lock(&thermal_list_lock); | |
1058 | list_for_each_entry(pos, &thermal_cdev_list, node) | |
b659a30d EV |
1059 | if (pos == cdev) |
1060 | break; | |
203d3d4a ZR |
1061 | if (pos != cdev) { |
1062 | /* thermal cooling device not found */ | |
1063 | mutex_unlock(&thermal_list_lock); | |
1064 | return; | |
1065 | } | |
1066 | list_del(&cdev->node); | |
7e8ee1e9 D |
1067 | |
1068 | /* Unbind all thermal zones associated with 'this' cdev */ | |
203d3d4a | 1069 | list_for_each_entry(tz, &thermal_tz_list, node) { |
7e8ee1e9 D |
1070 | if (tz->ops->unbind) { |
1071 | tz->ops->unbind(tz, cdev); | |
1072 | continue; | |
1073 | } | |
1074 | ||
1075 | if (!tz->tzp || !tz->tzp->tbp) | |
203d3d4a | 1076 | continue; |
7e8ee1e9 D |
1077 | |
1078 | tzp = tz->tzp; | |
1079 | for (i = 0; i < tzp->num_tbps; i++) { | |
1080 | if (tzp->tbp[i].cdev == cdev) { | |
1081 | __unbind(tz, tzp->tbp[i].trip_mask, cdev); | |
1082 | tzp->tbp[i].cdev = NULL; | |
1083 | } | |
1084 | } | |
203d3d4a | 1085 | } |
7e8ee1e9 | 1086 | |
203d3d4a | 1087 | mutex_unlock(&thermal_list_lock); |
7e8ee1e9 | 1088 | |
5a5b7d8d | 1089 | ida_free(&thermal_cdev_ida, cdev->id); |
3c587768 | 1090 | device_del(&cdev->device); |
8ea22951 | 1091 | thermal_cooling_device_destroy_sysfs(cdev); |
58483761 | 1092 | kfree(cdev->type); |
3c587768 | 1093 | put_device(&cdev->device); |
203d3d4a | 1094 | } |
910cb1e3 | 1095 | EXPORT_SYMBOL_GPL(thermal_cooling_device_unregister); |
203d3d4a | 1096 | |
90f5b5bb | 1097 | static void bind_tz(struct thermal_zone_device *tz) |
ce119f83 | 1098 | { |
90f5b5bb EV |
1099 | int i, ret; |
1100 | struct thermal_cooling_device *pos = NULL; | |
1101 | const struct thermal_zone_params *tzp = tz->tzp; | |
ce119f83 | 1102 | |
90f5b5bb | 1103 | if (!tzp && !tz->ops->bind) |
ce119f83 | 1104 | return; |
c56f5c03 | 1105 | |
90f5b5bb | 1106 | mutex_lock(&thermal_list_lock); |
c56f5c03 | 1107 | |
90f5b5bb EV |
1108 | /* If there is ops->bind, try to use ops->bind */ |
1109 | if (tz->ops->bind) { | |
1110 | list_for_each_entry(pos, &thermal_cdev_list, node) { | |
1111 | ret = tz->ops->bind(tz, pos); | |
1112 | if (ret) | |
1113 | print_bind_err_msg(tz, pos, ret); | |
27365a6c | 1114 | } |
90f5b5bb | 1115 | goto exit; |
27365a6c | 1116 | } |
c56f5c03 | 1117 | |
90f5b5bb EV |
1118 | if (!tzp || !tzp->tbp) |
1119 | goto exit; | |
27365a6c | 1120 | |
90f5b5bb EV |
1121 | list_for_each_entry(pos, &thermal_cdev_list, node) { |
1122 | for (i = 0; i < tzp->num_tbps; i++) { | |
1123 | if (tzp->tbp[i].cdev || !tzp->tbp[i].match) | |
1124 | continue; | |
1125 | if (tzp->tbp[i].match(tz, pos)) | |
1126 | continue; | |
1127 | tzp->tbp[i].cdev = pos; | |
1128 | __bind(tz, tzp->tbp[i].trip_mask, pos, | |
1129 | tzp->tbp[i].binding_limits, | |
1130 | tzp->tbp[i].weight); | |
27365a6c | 1131 | } |
c56f5c03 | 1132 | } |
90f5b5bb EV |
1133 | exit: |
1134 | mutex_unlock(&thermal_list_lock); | |
c56f5c03 D |
1135 | } |
1136 | ||
e5f2cda6 DL |
1137 | static void thermal_set_delay_jiffies(unsigned long *delay_jiffies, int delay_ms) |
1138 | { | |
1139 | *delay_jiffies = msecs_to_jiffies(delay_ms); | |
1140 | if (delay_ms > 1000) | |
1141 | *delay_jiffies = round_jiffies(*delay_jiffies); | |
1142 | } | |
1143 | ||
203d3d4a | 1144 | /** |
fae11de5 | 1145 | * thermal_zone_device_register_with_trips() - register a new thermal zone device |
203d3d4a | 1146 | * @type: the thermal zone device type |
fae11de5 | 1147 | * @trips: a pointer to an array of thermal trips |
e5bfcd30 | 1148 | * @num_trips: the number of trip points the thermal zone support |
c56f5c03 | 1149 | * @mask: a bit string indicating the writeablility of trip points |
203d3d4a ZR |
1150 | * @devdata: private device data |
1151 | * @ops: standard thermal zone device callbacks | |
50125a9b | 1152 | * @tzp: thermal zone platform parameters |
b1569e99 MG |
1153 | * @passive_delay: number of milliseconds to wait between polls when |
1154 | * performing passive cooling | |
1155 | * @polling_delay: number of milliseconds to wait between polls when checking | |
1156 | * whether trip points have been crossed (0 for interrupt | |
1157 | * driven systems) | |
203d3d4a | 1158 | * |
a00e55f9 EV |
1159 | * This interface function adds a new thermal zone device (sensor) to |
1160 | * /sys/class/thermal folder as thermal_zone[0-*]. It tries to bind all the | |
1161 | * thermal cooling devices registered at the same time. | |
203d3d4a | 1162 | * thermal_zone_device_unregister() must be called when the device is no |
1b7ddb84 | 1163 | * longer needed. The passive cooling depends on the .get_trend() return value. |
a00e55f9 EV |
1164 | * |
1165 | * Return: a pointer to the created struct thermal_zone_device or an | |
1166 | * in case of error, an ERR_PTR. Caller must check return value with | |
1167 | * IS_ERR*() helpers. | |
203d3d4a | 1168 | */ |
eb7be329 | 1169 | struct thermal_zone_device * |
fae11de5 DL |
1170 | thermal_zone_device_register_with_trips(const char *type, struct thermal_trip *trips, int num_trips, int mask, |
1171 | void *devdata, struct thermal_zone_device_ops *ops, | |
1172 | struct thermal_zone_params *tzp, int passive_delay, | |
1173 | int polling_delay) | |
203d3d4a ZR |
1174 | { |
1175 | struct thermal_zone_device *tz; | |
03a971a2 | 1176 | enum thermal_trip_type trip_type; |
81ad4276 | 1177 | int trip_temp; |
adc8749b | 1178 | int id; |
203d3d4a ZR |
1179 | int result; |
1180 | int count; | |
e33df1d2 | 1181 | struct thermal_governor *governor; |
203d3d4a | 1182 | |
67eed44b | 1183 | if (!type || strlen(type) == 0) { |
3f95ac32 | 1184 | pr_err("No thermal zone type defined\n"); |
54fa38cc | 1185 | return ERR_PTR(-EINVAL); |
67eed44b | 1186 | } |
54fa38cc | 1187 | |
c71d8035 | 1188 | if (strlen(type) >= THERMAL_NAME_LENGTH) { |
3f95ac32 | 1189 | pr_err("Thermal zone name (%s) too long, should be under %d chars\n", |
67eed44b | 1190 | type, THERMAL_NAME_LENGTH); |
3e6fda5c | 1191 | return ERR_PTR(-EINVAL); |
67eed44b | 1192 | } |
203d3d4a | 1193 | |
82b1ec79 SP |
1194 | /* |
1195 | * Max trip count can't exceed 31 as the "mask >> num_trips" condition. | |
1196 | * For example, shifting by 32 will result in compiler warning: | |
1197 | * warning: right shift count >= width of type [-Wshift-count- overflow] | |
1198 | * | |
1199 | * Also "mask >> num_trips" will always be true with 32 bit shift. | |
1200 | * E.g. mask = 0x80000000 for trip id 31 to be RW. Then | |
1201 | * mask >> 32 = 0x80000000 | |
1202 | * This will result in failure for the below condition. | |
1203 | * | |
1204 | * Check will be true when the bit 31 of the mask is set. | |
1205 | * 32 bit shift will cause overflow of 4 byte integer. | |
1206 | */ | |
1207 | if (num_trips > (BITS_PER_TYPE(int) - 1) || num_trips < 0 || mask >> num_trips) { | |
3f95ac32 | 1208 | pr_err("Incorrect number of thermal trips\n"); |
3e6fda5c | 1209 | return ERR_PTR(-EINVAL); |
67eed44b | 1210 | } |
203d3d4a | 1211 | |
67eed44b | 1212 | if (!ops) { |
3f95ac32 | 1213 | pr_err("Thermal zone device ops not defined\n"); |
3e6fda5c | 1214 | return ERR_PTR(-EINVAL); |
67eed44b | 1215 | } |
203d3d4a | 1216 | |
e5bfcd30 | 1217 | if (num_trips > 0 && (!ops->get_trip_type || !ops->get_trip_temp)) |
6b2aa51d EV |
1218 | return ERR_PTR(-EINVAL); |
1219 | ||
95e3ed15 | 1220 | tz = kzalloc(sizeof(*tz), GFP_KERNEL); |
203d3d4a | 1221 | if (!tz) |
3e6fda5c | 1222 | return ERR_PTR(-ENOMEM); |
203d3d4a | 1223 | |
2d374139 | 1224 | INIT_LIST_HEAD(&tz->thermal_instances); |
b31ef828 | 1225 | ida_init(&tz->ida); |
203d3d4a | 1226 | mutex_init(&tz->lock); |
5a5b7d8d | 1227 | id = ida_alloc(&thermal_tz_ida, GFP_KERNEL); |
adc8749b YH |
1228 | if (id < 0) { |
1229 | result = id; | |
9d9ca1f9 | 1230 | goto free_tz; |
adc8749b | 1231 | } |
203d3d4a | 1232 | |
adc8749b | 1233 | tz->id = id; |
1e6c8fb8 | 1234 | strscpy(tz->type, type, sizeof(tz->type)); |
d7203eed | 1235 | |
1dd7128b YS |
1236 | result = dev_set_name(&tz->device, "thermal_zone%d", tz->id); |
1237 | if (result) | |
1238 | goto remove_id; | |
1239 | ||
d7203eed DL |
1240 | if (!ops->critical) |
1241 | ops->critical = thermal_zone_device_critical; | |
1242 | ||
203d3d4a | 1243 | tz->ops = ops; |
50125a9b | 1244 | tz->tzp = tzp; |
203d3d4a ZR |
1245 | tz->device.class = &thermal_class; |
1246 | tz->devdata = devdata; | |
1247 | tz->trips = trips; | |
e5bfcd30 | 1248 | tz->num_trips = num_trips; |
1c600861 | 1249 | |
17d399cd DL |
1250 | thermal_set_delay_jiffies(&tz->passive_delay_jiffies, passive_delay); |
1251 | thermal_set_delay_jiffies(&tz->polling_delay_jiffies, polling_delay); | |
1252 | ||
4d0fe749 | 1253 | /* sys I/F */ |
1c600861 | 1254 | /* Add nodes that are always present via .groups */ |
4d0fe749 EV |
1255 | result = thermal_zone_create_device_groups(tz, mask); |
1256 | if (result) | |
9d9ca1f9 | 1257 | goto remove_id; |
4d0fe749 | 1258 | |
4511f716 CY |
1259 | /* A new thermal zone needs to be updated anyway. */ |
1260 | atomic_set(&tz->need_update, 1); | |
b1569e99 | 1261 | |
203d3d4a | 1262 | result = device_register(&tz->device); |
9d9ca1f9 | 1263 | if (result) |
adc8749b | 1264 | goto release_device; |
203d3d4a | 1265 | |
e5bfcd30 | 1266 | for (count = 0; count < num_trips; count++) { |
37b2539e BZ |
1267 | if (tz->ops->get_trip_type(tz, count, &trip_type) || |
1268 | tz->ops->get_trip_temp(tz, count, &trip_temp) || | |
1269 | !trip_temp) | |
81ad4276 | 1270 | set_bit(count, &tz->trips_disabled); |
203d3d4a ZR |
1271 | } |
1272 | ||
a4a15485 D |
1273 | /* Update 'this' zone's governor information */ |
1274 | mutex_lock(&thermal_governor_lock); | |
1275 | ||
1276 | if (tz->tzp) | |
e33df1d2 | 1277 | governor = __find_governor(tz->tzp->governor_name); |
a4a15485 | 1278 | else |
e33df1d2 JM |
1279 | governor = def_governor; |
1280 | ||
1281 | result = thermal_set_governor(tz, governor); | |
1282 | if (result) { | |
1283 | mutex_unlock(&thermal_governor_lock); | |
1284 | goto unregister; | |
1285 | } | |
a4a15485 D |
1286 | |
1287 | mutex_unlock(&thermal_governor_lock); | |
1288 | ||
ccba4ffd EV |
1289 | if (!tz->tzp || !tz->tzp->no_hwmon) { |
1290 | result = thermal_add_hwmon_sysfs(tz); | |
1291 | if (result) | |
1292 | goto unregister; | |
1293 | } | |
e68b16ab | 1294 | |
203d3d4a ZR |
1295 | mutex_lock(&thermal_list_lock); |
1296 | list_add_tail(&tz->node, &thermal_tz_list); | |
203d3d4a ZR |
1297 | mutex_unlock(&thermal_list_lock); |
1298 | ||
7e8ee1e9 D |
1299 | /* Bind cooling devices for this zone */ |
1300 | bind_tz(tz); | |
1301 | ||
b659a30d | 1302 | INIT_DELAYED_WORK(&tz->poll_queue, thermal_zone_device_check); |
b1569e99 | 1303 | |
d0df264f | 1304 | thermal_zone_device_init(tz); |
4511f716 CY |
1305 | /* Update the new thermal zone and mark it as already updated. */ |
1306 | if (atomic_cmpxchg(&tz->need_update, 1, 0)) | |
0e70f466 | 1307 | thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED); |
b1569e99 | 1308 | |
55cdf0a2 DL |
1309 | thermal_notify_tz_create(tz->id, tz->type); |
1310 | ||
14015860 | 1311 | return tz; |
203d3d4a | 1312 | |
caca8b80 | 1313 | unregister: |
adc8749b YH |
1314 | device_del(&tz->device); |
1315 | release_device: | |
1316 | put_device(&tz->device); | |
1317 | tz = NULL; | |
9d9ca1f9 | 1318 | remove_id: |
5a5b7d8d | 1319 | ida_free(&thermal_tz_ida, id); |
9d9ca1f9 CJ |
1320 | free_tz: |
1321 | kfree(tz); | |
1322 | return ERR_PTR(result); | |
203d3d4a | 1323 | } |
a921be53 | 1324 | EXPORT_SYMBOL_GPL(thermal_zone_device_register_with_trips); |
fae11de5 DL |
1325 | |
1326 | struct thermal_zone_device *thermal_zone_device_register(const char *type, int ntrips, int mask, | |
1327 | void *devdata, struct thermal_zone_device_ops *ops, | |
1328 | struct thermal_zone_params *tzp, int passive_delay, | |
1329 | int polling_delay) | |
1330 | { | |
1331 | return thermal_zone_device_register_with_trips(type, NULL, ntrips, mask, | |
1332 | devdata, ops, tzp, | |
1333 | passive_delay, polling_delay); | |
1334 | } | |
910cb1e3 | 1335 | EXPORT_SYMBOL_GPL(thermal_zone_device_register); |
203d3d4a ZR |
1336 | |
1337 | /** | |
a052b511 | 1338 | * thermal_zone_device_unregister - removes the registered thermal zone device |
203d3d4a ZR |
1339 | * @tz: the thermal zone device to remove |
1340 | */ | |
1341 | void thermal_zone_device_unregister(struct thermal_zone_device *tz) | |
1342 | { | |
a5f785ce | 1343 | int i, tz_id; |
7e8ee1e9 | 1344 | const struct thermal_zone_params *tzp; |
203d3d4a ZR |
1345 | struct thermal_cooling_device *cdev; |
1346 | struct thermal_zone_device *pos = NULL; | |
203d3d4a ZR |
1347 | |
1348 | if (!tz) | |
1349 | return; | |
1350 | ||
7e8ee1e9 | 1351 | tzp = tz->tzp; |
a5f785ce | 1352 | tz_id = tz->id; |
7e8ee1e9 | 1353 | |
203d3d4a ZR |
1354 | mutex_lock(&thermal_list_lock); |
1355 | list_for_each_entry(pos, &thermal_tz_list, node) | |
b659a30d EV |
1356 | if (pos == tz) |
1357 | break; | |
203d3d4a ZR |
1358 | if (pos != tz) { |
1359 | /* thermal zone device not found */ | |
1360 | mutex_unlock(&thermal_list_lock); | |
1361 | return; | |
1362 | } | |
1363 | list_del(&tz->node); | |
7e8ee1e9 D |
1364 | |
1365 | /* Unbind all cdevs associated with 'this' thermal zone */ | |
1366 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
1367 | if (tz->ops->unbind) { | |
1368 | tz->ops->unbind(tz, cdev); | |
1369 | continue; | |
1370 | } | |
1371 | ||
1372 | if (!tzp || !tzp->tbp) | |
1373 | break; | |
1374 | ||
1375 | for (i = 0; i < tzp->num_tbps; i++) { | |
1376 | if (tzp->tbp[i].cdev == cdev) { | |
1377 | __unbind(tz, tzp->tbp[i].trip_mask, cdev); | |
1378 | tzp->tbp[i].cdev = NULL; | |
1379 | } | |
1380 | } | |
1381 | } | |
1382 | ||
203d3d4a ZR |
1383 | mutex_unlock(&thermal_list_lock); |
1384 | ||
163b00cd | 1385 | cancel_delayed_work_sync(&tz->poll_queue); |
b1569e99 | 1386 | |
e33df1d2 | 1387 | thermal_set_governor(tz, NULL); |
203d3d4a | 1388 | |
e68b16ab | 1389 | thermal_remove_hwmon_sysfs(tz); |
5a5b7d8d | 1390 | ida_free(&thermal_tz_ida, tz->id); |
b31ef828 | 1391 | ida_destroy(&tz->ida); |
203d3d4a ZR |
1392 | mutex_destroy(&tz->lock); |
1393 | device_unregister(&tz->device); | |
55cdf0a2 | 1394 | |
a5f785ce | 1395 | thermal_notify_tz_delete(tz_id); |
203d3d4a | 1396 | } |
910cb1e3 | 1397 | EXPORT_SYMBOL_GPL(thermal_zone_device_unregister); |
203d3d4a | 1398 | |
63c4d919 EV |
1399 | /** |
1400 | * thermal_zone_get_zone_by_name() - search for a zone and returns its ref | |
1401 | * @name: thermal zone name to fetch the temperature | |
1402 | * | |
1403 | * When only one zone is found with the passed name, returns a reference to it. | |
1404 | * | |
1405 | * Return: On success returns a reference to an unique thermal zone with | |
1406 | * matching name equals to @name, an ERR_PTR otherwise (-EINVAL for invalid | |
1407 | * paramenters, -ENODEV for not found and -EEXIST for multiple matches). | |
1408 | */ | |
1409 | struct thermal_zone_device *thermal_zone_get_zone_by_name(const char *name) | |
1410 | { | |
1411 | struct thermal_zone_device *pos = NULL, *ref = ERR_PTR(-EINVAL); | |
1412 | unsigned int found = 0; | |
1413 | ||
1414 | if (!name) | |
1415 | goto exit; | |
1416 | ||
1417 | mutex_lock(&thermal_list_lock); | |
1418 | list_for_each_entry(pos, &thermal_tz_list, node) | |
484ac2f3 | 1419 | if (!strncasecmp(name, pos->type, THERMAL_NAME_LENGTH)) { |
63c4d919 EV |
1420 | found++; |
1421 | ref = pos; | |
1422 | } | |
1423 | mutex_unlock(&thermal_list_lock); | |
1424 | ||
1425 | /* nothing has been found, thus an error code for it */ | |
1426 | if (found == 0) | |
1427 | ref = ERR_PTR(-ENODEV); | |
1428 | else if (found > 1) | |
1429 | /* Success only when an unique zone is found */ | |
1430 | ref = ERR_PTR(-EEXIST); | |
1431 | ||
1432 | exit: | |
1433 | return ref; | |
1434 | } | |
1435 | EXPORT_SYMBOL_GPL(thermal_zone_get_zone_by_name); | |
1436 | ||
ff140fea | 1437 | static int thermal_pm_notify(struct notifier_block *nb, |
eb7be329 | 1438 | unsigned long mode, void *_unused) |
ff140fea ZR |
1439 | { |
1440 | struct thermal_zone_device *tz; | |
1441 | ||
1442 | switch (mode) { | |
1443 | case PM_HIBERNATION_PREPARE: | |
1444 | case PM_RESTORE_PREPARE: | |
1445 | case PM_SUSPEND_PREPARE: | |
1446 | atomic_set(&in_suspend, 1); | |
1447 | break; | |
1448 | case PM_POST_HIBERNATION: | |
1449 | case PM_POST_RESTORE: | |
1450 | case PM_POST_SUSPEND: | |
1451 | atomic_set(&in_suspend, 0); | |
1452 | list_for_each_entry(tz, &thermal_tz_list, node) { | |
964f4843 | 1453 | thermal_zone_device_init(tz); |
0e70f466 SP |
1454 | thermal_zone_device_update(tz, |
1455 | THERMAL_EVENT_UNSPECIFIED); | |
ff140fea ZR |
1456 | } |
1457 | break; | |
1458 | default: | |
1459 | break; | |
1460 | } | |
1461 | return 0; | |
1462 | } | |
1463 | ||
1464 | static struct notifier_block thermal_pm_nb = { | |
1465 | .notifier_call = thermal_pm_notify, | |
1466 | }; | |
1467 | ||
203d3d4a ZR |
1468 | static int __init thermal_init(void) |
1469 | { | |
80a26a5c ZR |
1470 | int result; |
1471 | ||
d2a89b52 DL |
1472 | result = thermal_netlink_init(); |
1473 | if (result) | |
1474 | goto error; | |
1475 | ||
80a26a5c ZR |
1476 | result = thermal_register_governors(); |
1477 | if (result) | |
1478 | goto error; | |
203d3d4a ZR |
1479 | |
1480 | result = class_register(&thermal_class); | |
80a26a5c ZR |
1481 | if (result) |
1482 | goto unregister_governors; | |
1483 | ||
ff140fea ZR |
1484 | result = register_pm_notifier(&thermal_pm_nb); |
1485 | if (result) | |
1486 | pr_warn("Thermal: Can not register suspend notifier, return %d\n", | |
1487 | result); | |
1488 | ||
80a26a5c ZR |
1489 | return 0; |
1490 | ||
9d367e5e LH |
1491 | unregister_governors: |
1492 | thermal_unregister_governors(); | |
80a26a5c | 1493 | error: |
b31ef828 MW |
1494 | ida_destroy(&thermal_tz_ida); |
1495 | ida_destroy(&thermal_cdev_ida); | |
80a26a5c ZR |
1496 | mutex_destroy(&thermal_list_lock); |
1497 | mutex_destroy(&thermal_governor_lock); | |
203d3d4a ZR |
1498 | return result; |
1499 | } | |
3f5a2cbe | 1500 | postcore_initcall(thermal_init); |