Commit | Line | Data |
---|---|---|
203d3d4a ZR |
1 | /* |
2 | * thermal.c - Generic Thermal Management Sysfs support. | |
3 | * | |
4 | * Copyright (C) 2008 Intel Corp | |
5 | * Copyright (C) 2008 Zhang Rui <rui.zhang@intel.com> | |
6 | * Copyright (C) 2008 Sujith Thomas <sujith.thomas@intel.com> | |
7 | * | |
8 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; version 2 of the License. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License along | |
20 | * with this program; if not, write to the Free Software Foundation, Inc., | |
21 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
22 | * | |
23 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
24 | */ | |
25 | ||
c5a01dd5 JP |
26 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
27 | ||
203d3d4a ZR |
28 | #include <linux/module.h> |
29 | #include <linux/device.h> | |
30 | #include <linux/err.h> | |
5a0e3ad6 | 31 | #include <linux/slab.h> |
203d3d4a ZR |
32 | #include <linux/kdev_t.h> |
33 | #include <linux/idr.h> | |
34 | #include <linux/thermal.h> | |
b1569e99 | 35 | #include <linux/reboot.h> |
42a5bf50 | 36 | #include <linux/string.h> |
a116b5d4 | 37 | #include <linux/of.h> |
4cb18728 D |
38 | #include <net/netlink.h> |
39 | #include <net/genetlink.h> | |
ff140fea | 40 | #include <linux/suspend.h> |
203d3d4a | 41 | |
100a8fdb PA |
42 | #define CREATE_TRACE_POINTS |
43 | #include <trace/events/thermal.h> | |
44 | ||
71350db4 | 45 | #include "thermal_core.h" |
0dd88793 | 46 | #include "thermal_hwmon.h" |
71350db4 | 47 | |
63c4ec90 | 48 | MODULE_AUTHOR("Zhang Rui"); |
203d3d4a | 49 | MODULE_DESCRIPTION("Generic thermal management sysfs support"); |
6d8d4974 | 50 | MODULE_LICENSE("GPL v2"); |
203d3d4a | 51 | |
203d3d4a ZR |
52 | static DEFINE_IDR(thermal_tz_idr); |
53 | static DEFINE_IDR(thermal_cdev_idr); | |
54 | static DEFINE_MUTEX(thermal_idr_lock); | |
55 | ||
56 | static LIST_HEAD(thermal_tz_list); | |
57 | static LIST_HEAD(thermal_cdev_list); | |
a4a15485 D |
58 | static LIST_HEAD(thermal_governor_list); |
59 | ||
203d3d4a | 60 | static DEFINE_MUTEX(thermal_list_lock); |
a4a15485 D |
61 | static DEFINE_MUTEX(thermal_governor_lock); |
62 | ||
ff140fea ZR |
63 | static atomic_t in_suspend; |
64 | ||
f2234bcd ZR |
65 | static struct thermal_governor *def_governor; |
66 | ||
a4a15485 D |
67 | static struct thermal_governor *__find_governor(const char *name) |
68 | { | |
69 | struct thermal_governor *pos; | |
70 | ||
f2234bcd ZR |
71 | if (!name || !name[0]) |
72 | return def_governor; | |
73 | ||
a4a15485 | 74 | list_for_each_entry(pos, &thermal_governor_list, governor_list) |
484ac2f3 | 75 | if (!strncasecmp(name, pos->name, THERMAL_NAME_LENGTH)) |
a4a15485 D |
76 | return pos; |
77 | ||
78 | return NULL; | |
79 | } | |
80 | ||
e33df1d2 JM |
81 | /** |
82 | * bind_previous_governor() - bind the previous governor of the thermal zone | |
83 | * @tz: a valid pointer to a struct thermal_zone_device | |
84 | * @failed_gov_name: the name of the governor that failed to register | |
85 | * | |
86 | * Register the previous governor of the thermal zone after a new | |
87 | * governor has failed to be bound. | |
88 | */ | |
89 | static void bind_previous_governor(struct thermal_zone_device *tz, | |
90 | const char *failed_gov_name) | |
91 | { | |
92 | if (tz->governor && tz->governor->bind_to_tz) { | |
93 | if (tz->governor->bind_to_tz(tz)) { | |
94 | dev_err(&tz->device, | |
95 | "governor %s failed to bind and the previous one (%s) failed to bind again, thermal zone %s has no governor\n", | |
96 | failed_gov_name, tz->governor->name, tz->type); | |
97 | tz->governor = NULL; | |
98 | } | |
99 | } | |
100 | } | |
101 | ||
102 | /** | |
103 | * thermal_set_governor() - Switch to another governor | |
104 | * @tz: a valid pointer to a struct thermal_zone_device | |
105 | * @new_gov: pointer to the new governor | |
106 | * | |
107 | * Change the governor of thermal zone @tz. | |
108 | * | |
109 | * Return: 0 on success, an error if the new governor's bind_to_tz() failed. | |
110 | */ | |
111 | static int thermal_set_governor(struct thermal_zone_device *tz, | |
112 | struct thermal_governor *new_gov) | |
113 | { | |
114 | int ret = 0; | |
115 | ||
116 | if (tz->governor && tz->governor->unbind_from_tz) | |
117 | tz->governor->unbind_from_tz(tz); | |
118 | ||
119 | if (new_gov && new_gov->bind_to_tz) { | |
120 | ret = new_gov->bind_to_tz(tz); | |
121 | if (ret) { | |
122 | bind_previous_governor(tz, new_gov->name); | |
123 | ||
124 | return ret; | |
125 | } | |
126 | } | |
127 | ||
128 | tz->governor = new_gov; | |
129 | ||
130 | return ret; | |
131 | } | |
132 | ||
a4a15485 D |
133 | int thermal_register_governor(struct thermal_governor *governor) |
134 | { | |
135 | int err; | |
136 | const char *name; | |
137 | struct thermal_zone_device *pos; | |
138 | ||
139 | if (!governor) | |
140 | return -EINVAL; | |
141 | ||
142 | mutex_lock(&thermal_governor_lock); | |
143 | ||
144 | err = -EBUSY; | |
145 | if (__find_governor(governor->name) == NULL) { | |
146 | err = 0; | |
147 | list_add(&governor->governor_list, &thermal_governor_list); | |
f2234bcd ZR |
148 | if (!def_governor && !strncmp(governor->name, |
149 | DEFAULT_THERMAL_GOVERNOR, THERMAL_NAME_LENGTH)) | |
150 | def_governor = governor; | |
a4a15485 D |
151 | } |
152 | ||
153 | mutex_lock(&thermal_list_lock); | |
154 | ||
155 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
f2234bcd ZR |
156 | /* |
157 | * only thermal zones with specified tz->tzp->governor_name | |
158 | * may run with tz->govenor unset | |
159 | */ | |
a4a15485 D |
160 | if (pos->governor) |
161 | continue; | |
f2234bcd ZR |
162 | |
163 | name = pos->tzp->governor_name; | |
164 | ||
e33df1d2 JM |
165 | if (!strncasecmp(name, governor->name, THERMAL_NAME_LENGTH)) { |
166 | int ret; | |
167 | ||
168 | ret = thermal_set_governor(pos, governor); | |
169 | if (ret) | |
170 | dev_err(&pos->device, | |
171 | "Failed to set governor %s for thermal zone %s: %d\n", | |
172 | governor->name, pos->type, ret); | |
173 | } | |
a4a15485 D |
174 | } |
175 | ||
176 | mutex_unlock(&thermal_list_lock); | |
177 | mutex_unlock(&thermal_governor_lock); | |
178 | ||
179 | return err; | |
180 | } | |
a4a15485 D |
181 | |
182 | void thermal_unregister_governor(struct thermal_governor *governor) | |
183 | { | |
184 | struct thermal_zone_device *pos; | |
185 | ||
186 | if (!governor) | |
187 | return; | |
188 | ||
189 | mutex_lock(&thermal_governor_lock); | |
190 | ||
191 | if (__find_governor(governor->name) == NULL) | |
192 | goto exit; | |
193 | ||
194 | mutex_lock(&thermal_list_lock); | |
195 | ||
196 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
484ac2f3 | 197 | if (!strncasecmp(pos->governor->name, governor->name, |
a4a15485 | 198 | THERMAL_NAME_LENGTH)) |
e33df1d2 | 199 | thermal_set_governor(pos, NULL); |
a4a15485 D |
200 | } |
201 | ||
202 | mutex_unlock(&thermal_list_lock); | |
203 | list_del(&governor->governor_list); | |
204 | exit: | |
205 | mutex_unlock(&thermal_governor_lock); | |
206 | return; | |
207 | } | |
203d3d4a ZR |
208 | |
209 | static int get_idr(struct idr *idr, struct mutex *lock, int *id) | |
210 | { | |
6deb69fa | 211 | int ret; |
203d3d4a ZR |
212 | |
213 | if (lock) | |
214 | mutex_lock(lock); | |
6deb69fa | 215 | ret = idr_alloc(idr, NULL, 0, 0, GFP_KERNEL); |
203d3d4a ZR |
216 | if (lock) |
217 | mutex_unlock(lock); | |
6deb69fa TH |
218 | if (unlikely(ret < 0)) |
219 | return ret; | |
220 | *id = ret; | |
203d3d4a ZR |
221 | return 0; |
222 | } | |
223 | ||
224 | static void release_idr(struct idr *idr, struct mutex *lock, int id) | |
225 | { | |
226 | if (lock) | |
227 | mutex_lock(lock); | |
228 | idr_remove(idr, id); | |
229 | if (lock) | |
230 | mutex_unlock(lock); | |
231 | } | |
232 | ||
9b4298a0 D |
233 | int get_tz_trend(struct thermal_zone_device *tz, int trip) |
234 | { | |
235 | enum thermal_trend trend; | |
236 | ||
0c872507 EV |
237 | if (tz->emul_temperature || !tz->ops->get_trend || |
238 | tz->ops->get_trend(tz, trip, &trend)) { | |
9b4298a0 D |
239 | if (tz->temperature > tz->last_temperature) |
240 | trend = THERMAL_TREND_RAISING; | |
241 | else if (tz->temperature < tz->last_temperature) | |
242 | trend = THERMAL_TREND_DROPPING; | |
243 | else | |
244 | trend = THERMAL_TREND_STABLE; | |
245 | } | |
246 | ||
247 | return trend; | |
248 | } | |
249 | EXPORT_SYMBOL(get_tz_trend); | |
250 | ||
251 | struct thermal_instance *get_thermal_instance(struct thermal_zone_device *tz, | |
252 | struct thermal_cooling_device *cdev, int trip) | |
253 | { | |
254 | struct thermal_instance *pos = NULL; | |
255 | struct thermal_instance *target_instance = NULL; | |
256 | ||
257 | mutex_lock(&tz->lock); | |
258 | mutex_lock(&cdev->lock); | |
259 | ||
260 | list_for_each_entry(pos, &tz->thermal_instances, tz_node) { | |
261 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { | |
262 | target_instance = pos; | |
263 | break; | |
264 | } | |
265 | } | |
266 | ||
267 | mutex_unlock(&cdev->lock); | |
268 | mutex_unlock(&tz->lock); | |
269 | ||
270 | return target_instance; | |
271 | } | |
272 | EXPORT_SYMBOL(get_thermal_instance); | |
273 | ||
7e8ee1e9 D |
274 | static void print_bind_err_msg(struct thermal_zone_device *tz, |
275 | struct thermal_cooling_device *cdev, int ret) | |
276 | { | |
277 | dev_err(&tz->device, "binding zone %s with cdev %s failed:%d\n", | |
278 | tz->type, cdev->type, ret); | |
279 | } | |
280 | ||
281 | static void __bind(struct thermal_zone_device *tz, int mask, | |
a8892d83 | 282 | struct thermal_cooling_device *cdev, |
6cd9e9f6 KS |
283 | unsigned long *limits, |
284 | unsigned int weight) | |
7e8ee1e9 D |
285 | { |
286 | int i, ret; | |
287 | ||
288 | for (i = 0; i < tz->trips; i++) { | |
289 | if (mask & (1 << i)) { | |
a8892d83 EV |
290 | unsigned long upper, lower; |
291 | ||
292 | upper = THERMAL_NO_LIMIT; | |
293 | lower = THERMAL_NO_LIMIT; | |
294 | if (limits) { | |
295 | lower = limits[i * 2]; | |
296 | upper = limits[i * 2 + 1]; | |
297 | } | |
7e8ee1e9 | 298 | ret = thermal_zone_bind_cooling_device(tz, i, cdev, |
6cd9e9f6 KS |
299 | upper, lower, |
300 | weight); | |
7e8ee1e9 D |
301 | if (ret) |
302 | print_bind_err_msg(tz, cdev, ret); | |
303 | } | |
304 | } | |
305 | } | |
306 | ||
307 | static void __unbind(struct thermal_zone_device *tz, int mask, | |
308 | struct thermal_cooling_device *cdev) | |
309 | { | |
310 | int i; | |
311 | ||
312 | for (i = 0; i < tz->trips; i++) | |
313 | if (mask & (1 << i)) | |
314 | thermal_zone_unbind_cooling_device(tz, i, cdev); | |
315 | } | |
316 | ||
317 | static void bind_cdev(struct thermal_cooling_device *cdev) | |
318 | { | |
319 | int i, ret; | |
320 | const struct thermal_zone_params *tzp; | |
321 | struct thermal_zone_device *pos = NULL; | |
322 | ||
323 | mutex_lock(&thermal_list_lock); | |
324 | ||
325 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
326 | if (!pos->tzp && !pos->ops->bind) | |
327 | continue; | |
328 | ||
a9f2d19b | 329 | if (pos->ops->bind) { |
7e8ee1e9 D |
330 | ret = pos->ops->bind(pos, cdev); |
331 | if (ret) | |
332 | print_bind_err_msg(pos, cdev, ret); | |
a9f2d19b | 333 | continue; |
7e8ee1e9 D |
334 | } |
335 | ||
336 | tzp = pos->tzp; | |
791700cd HD |
337 | if (!tzp || !tzp->tbp) |
338 | continue; | |
7e8ee1e9 D |
339 | |
340 | for (i = 0; i < tzp->num_tbps; i++) { | |
341 | if (tzp->tbp[i].cdev || !tzp->tbp[i].match) | |
342 | continue; | |
343 | if (tzp->tbp[i].match(pos, cdev)) | |
344 | continue; | |
345 | tzp->tbp[i].cdev = cdev; | |
a8892d83 | 346 | __bind(pos, tzp->tbp[i].trip_mask, cdev, |
6cd9e9f6 KS |
347 | tzp->tbp[i].binding_limits, |
348 | tzp->tbp[i].weight); | |
7e8ee1e9 D |
349 | } |
350 | } | |
351 | ||
352 | mutex_unlock(&thermal_list_lock); | |
353 | } | |
354 | ||
355 | static void bind_tz(struct thermal_zone_device *tz) | |
356 | { | |
357 | int i, ret; | |
358 | struct thermal_cooling_device *pos = NULL; | |
359 | const struct thermal_zone_params *tzp = tz->tzp; | |
360 | ||
361 | if (!tzp && !tz->ops->bind) | |
362 | return; | |
363 | ||
364 | mutex_lock(&thermal_list_lock); | |
365 | ||
a9f2d19b NW |
366 | /* If there is ops->bind, try to use ops->bind */ |
367 | if (tz->ops->bind) { | |
7e8ee1e9 D |
368 | list_for_each_entry(pos, &thermal_cdev_list, node) { |
369 | ret = tz->ops->bind(tz, pos); | |
370 | if (ret) | |
371 | print_bind_err_msg(tz, pos, ret); | |
372 | } | |
373 | goto exit; | |
374 | } | |
375 | ||
791700cd | 376 | if (!tzp || !tzp->tbp) |
7e8ee1e9 D |
377 | goto exit; |
378 | ||
379 | list_for_each_entry(pos, &thermal_cdev_list, node) { | |
380 | for (i = 0; i < tzp->num_tbps; i++) { | |
381 | if (tzp->tbp[i].cdev || !tzp->tbp[i].match) | |
382 | continue; | |
383 | if (tzp->tbp[i].match(tz, pos)) | |
384 | continue; | |
385 | tzp->tbp[i].cdev = pos; | |
a8892d83 | 386 | __bind(tz, tzp->tbp[i].trip_mask, pos, |
6cd9e9f6 KS |
387 | tzp->tbp[i].binding_limits, |
388 | tzp->tbp[i].weight); | |
7e8ee1e9 D |
389 | } |
390 | } | |
391 | exit: | |
392 | mutex_unlock(&thermal_list_lock); | |
393 | } | |
394 | ||
0c01ebbf D |
395 | static void thermal_zone_device_set_polling(struct thermal_zone_device *tz, |
396 | int delay) | |
397 | { | |
398 | if (delay > 1000) | |
399 | mod_delayed_work(system_freezable_wq, &tz->poll_queue, | |
400 | round_jiffies(msecs_to_jiffies(delay))); | |
401 | else if (delay) | |
402 | mod_delayed_work(system_freezable_wq, &tz->poll_queue, | |
403 | msecs_to_jiffies(delay)); | |
404 | else | |
405 | cancel_delayed_work(&tz->poll_queue); | |
406 | } | |
407 | ||
408 | static void monitor_thermal_zone(struct thermal_zone_device *tz) | |
409 | { | |
410 | mutex_lock(&tz->lock); | |
411 | ||
412 | if (tz->passive) | |
413 | thermal_zone_device_set_polling(tz, tz->passive_delay); | |
414 | else if (tz->polling_delay) | |
415 | thermal_zone_device_set_polling(tz, tz->polling_delay); | |
416 | else | |
417 | thermal_zone_device_set_polling(tz, 0); | |
418 | ||
419 | mutex_unlock(&tz->lock); | |
420 | } | |
421 | ||
422 | static void handle_non_critical_trips(struct thermal_zone_device *tz, | |
423 | int trip, enum thermal_trip_type trip_type) | |
424 | { | |
f2234bcd ZR |
425 | tz->governor ? tz->governor->throttle(tz, trip) : |
426 | def_governor->throttle(tz, trip); | |
0c01ebbf D |
427 | } |
428 | ||
429 | static void handle_critical_trips(struct thermal_zone_device *tz, | |
430 | int trip, enum thermal_trip_type trip_type) | |
431 | { | |
17e8351a | 432 | int trip_temp; |
0c01ebbf D |
433 | |
434 | tz->ops->get_trip_temp(tz, trip, &trip_temp); | |
435 | ||
436 | /* If we have not crossed the trip_temp, we do not care. */ | |
84ffe3ec | 437 | if (trip_temp <= 0 || tz->temperature < trip_temp) |
0c01ebbf D |
438 | return; |
439 | ||
208cd822 PA |
440 | trace_thermal_zone_trip(tz, trip, trip_type); |
441 | ||
0c01ebbf D |
442 | if (tz->ops->notify) |
443 | tz->ops->notify(tz, trip, trip_type); | |
444 | ||
445 | if (trip_type == THERMAL_TRIP_CRITICAL) { | |
923e0b1e EV |
446 | dev_emerg(&tz->device, |
447 | "critical temperature reached(%d C),shutting down\n", | |
448 | tz->temperature / 1000); | |
0c01ebbf D |
449 | orderly_poweroff(true); |
450 | } | |
451 | } | |
452 | ||
453 | static void handle_thermal_trip(struct thermal_zone_device *tz, int trip) | |
454 | { | |
455 | enum thermal_trip_type type; | |
456 | ||
81ad4276 ZR |
457 | /* Ignore disabled trip points */ |
458 | if (test_bit(trip, &tz->trips_disabled)) | |
459 | return; | |
460 | ||
0c01ebbf D |
461 | tz->ops->get_trip_type(tz, trip, &type); |
462 | ||
463 | if (type == THERMAL_TRIP_CRITICAL || type == THERMAL_TRIP_HOT) | |
464 | handle_critical_trips(tz, trip, type); | |
465 | else | |
466 | handle_non_critical_trips(tz, trip, type); | |
467 | /* | |
468 | * Alright, we handled this trip successfully. | |
469 | * So, start monitoring again. | |
470 | */ | |
471 | monitor_thermal_zone(tz); | |
472 | } | |
473 | ||
837b26bb | 474 | /** |
f6be0584 | 475 | * thermal_zone_get_temp() - returns the temperature of a thermal zone |
837b26bb EV |
476 | * @tz: a valid pointer to a struct thermal_zone_device |
477 | * @temp: a valid pointer to where to store the resulting temperature. | |
478 | * | |
479 | * When a valid thermal zone reference is passed, it will fetch its | |
480 | * temperature and fill @temp. | |
481 | * | |
482 | * Return: On success returns 0, an error code otherwise | |
483 | */ | |
17e8351a | 484 | int thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp) |
e6e238c3 | 485 | { |
837b26bb | 486 | int ret = -EINVAL; |
5e20b2e5 | 487 | int count; |
17e8351a | 488 | int crit_temp = INT_MAX; |
e6e238c3 ADK |
489 | enum thermal_trip_type type; |
490 | ||
81bd4e1c | 491 | if (!tz || IS_ERR(tz) || !tz->ops->get_temp) |
837b26bb EV |
492 | goto exit; |
493 | ||
e6e238c3 ADK |
494 | mutex_lock(&tz->lock); |
495 | ||
496 | ret = tz->ops->get_temp(tz, temp); | |
e6e238c3 | 497 | |
79e5421c SH |
498 | if (IS_ENABLED(CONFIG_THERMAL_EMULATION) && tz->emul_temperature) { |
499 | for (count = 0; count < tz->trips; count++) { | |
500 | ret = tz->ops->get_trip_type(tz, count, &type); | |
501 | if (!ret && type == THERMAL_TRIP_CRITICAL) { | |
502 | ret = tz->ops->get_trip_temp(tz, count, | |
503 | &crit_temp); | |
504 | break; | |
505 | } | |
506 | } | |
e6e238c3 | 507 | |
934c93b8 SH |
508 | /* |
509 | * Only allow emulating a temperature when the real temperature | |
510 | * is below the critical temperature so that the emulation code | |
511 | * cannot hide critical conditions. | |
512 | */ | |
79e5421c SH |
513 | if (!ret && *temp < crit_temp) |
514 | *temp = tz->emul_temperature; | |
515 | } | |
516 | ||
e6e238c3 | 517 | mutex_unlock(&tz->lock); |
837b26bb | 518 | exit: |
e6e238c3 ADK |
519 | return ret; |
520 | } | |
837b26bb | 521 | EXPORT_SYMBOL_GPL(thermal_zone_get_temp); |
e6e238c3 | 522 | |
0c01ebbf D |
523 | static void update_temperature(struct thermal_zone_device *tz) |
524 | { | |
17e8351a | 525 | int temp, ret; |
0c01ebbf | 526 | |
e6e238c3 | 527 | ret = thermal_zone_get_temp(tz, &temp); |
0c01ebbf | 528 | if (ret) { |
7e497a73 HG |
529 | if (ret != -EAGAIN) |
530 | dev_warn(&tz->device, | |
531 | "failed to read out thermal zone (%d)\n", | |
532 | ret); | |
e6e238c3 | 533 | return; |
0c01ebbf D |
534 | } |
535 | ||
e6e238c3 | 536 | mutex_lock(&tz->lock); |
0c01ebbf D |
537 | tz->last_temperature = tz->temperature; |
538 | tz->temperature = temp; | |
0c01ebbf | 539 | mutex_unlock(&tz->lock); |
06475b55 | 540 | |
100a8fdb | 541 | trace_thermal_temperature(tz); |
bb431ba2 ZR |
542 | if (tz->last_temperature == THERMAL_TEMP_INVALID) |
543 | dev_dbg(&tz->device, "last_temperature N/A, current_temperature=%d\n", | |
544 | tz->temperature); | |
545 | else | |
546 | dev_dbg(&tz->device, "last_temperature=%d, current_temperature=%d\n", | |
547 | tz->last_temperature, tz->temperature); | |
548 | } | |
549 | ||
550 | static void thermal_zone_device_reset(struct thermal_zone_device *tz) | |
551 | { | |
552 | struct thermal_instance *pos; | |
553 | ||
554 | tz->temperature = THERMAL_TEMP_INVALID; | |
555 | tz->passive = 0; | |
556 | list_for_each_entry(pos, &tz->thermal_instances, tz_node) | |
557 | pos->initialized = false; | |
0c01ebbf D |
558 | } |
559 | ||
560 | void thermal_zone_device_update(struct thermal_zone_device *tz) | |
561 | { | |
562 | int count; | |
563 | ||
ff140fea ZR |
564 | if (atomic_read(&in_suspend)) |
565 | return; | |
566 | ||
81bd4e1c EV |
567 | if (!tz->ops->get_temp) |
568 | return; | |
569 | ||
0c01ebbf D |
570 | update_temperature(tz); |
571 | ||
572 | for (count = 0; count < tz->trips; count++) | |
573 | handle_thermal_trip(tz, count); | |
574 | } | |
910cb1e3 | 575 | EXPORT_SYMBOL_GPL(thermal_zone_device_update); |
0c01ebbf D |
576 | |
577 | static void thermal_zone_device_check(struct work_struct *work) | |
578 | { | |
579 | struct thermal_zone_device *tz = container_of(work, struct | |
580 | thermal_zone_device, | |
581 | poll_queue.work); | |
582 | thermal_zone_device_update(tz); | |
583 | } | |
584 | ||
203d3d4a ZR |
585 | /* sys I/F for thermal zone */ |
586 | ||
587 | #define to_thermal_zone(_dev) \ | |
588 | container_of(_dev, struct thermal_zone_device, device) | |
589 | ||
590 | static ssize_t | |
591 | type_show(struct device *dev, struct device_attribute *attr, char *buf) | |
592 | { | |
593 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
594 | ||
595 | return sprintf(buf, "%s\n", tz->type); | |
596 | } | |
597 | ||
598 | static ssize_t | |
599 | temp_show(struct device *dev, struct device_attribute *attr, char *buf) | |
600 | { | |
601 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
17e8351a | 602 | int temperature, ret; |
203d3d4a | 603 | |
e6e238c3 | 604 | ret = thermal_zone_get_temp(tz, &temperature); |
6503e5df MG |
605 | |
606 | if (ret) | |
607 | return ret; | |
608 | ||
17e8351a | 609 | return sprintf(buf, "%d\n", temperature); |
203d3d4a ZR |
610 | } |
611 | ||
612 | static ssize_t | |
613 | mode_show(struct device *dev, struct device_attribute *attr, char *buf) | |
614 | { | |
615 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
616 | enum thermal_device_mode mode; |
617 | int result; | |
203d3d4a ZR |
618 | |
619 | if (!tz->ops->get_mode) | |
620 | return -EPERM; | |
621 | ||
6503e5df MG |
622 | result = tz->ops->get_mode(tz, &mode); |
623 | if (result) | |
624 | return result; | |
625 | ||
626 | return sprintf(buf, "%s\n", mode == THERMAL_DEVICE_ENABLED ? "enabled" | |
627 | : "disabled"); | |
203d3d4a ZR |
628 | } |
629 | ||
630 | static ssize_t | |
631 | mode_store(struct device *dev, struct device_attribute *attr, | |
632 | const char *buf, size_t count) | |
633 | { | |
634 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
635 | int result; | |
636 | ||
637 | if (!tz->ops->set_mode) | |
638 | return -EPERM; | |
639 | ||
f1f0e2ac | 640 | if (!strncmp(buf, "enabled", sizeof("enabled") - 1)) |
6503e5df | 641 | result = tz->ops->set_mode(tz, THERMAL_DEVICE_ENABLED); |
f1f0e2ac | 642 | else if (!strncmp(buf, "disabled", sizeof("disabled") - 1)) |
6503e5df MG |
643 | result = tz->ops->set_mode(tz, THERMAL_DEVICE_DISABLED); |
644 | else | |
645 | result = -EINVAL; | |
646 | ||
203d3d4a ZR |
647 | if (result) |
648 | return result; | |
649 | ||
650 | return count; | |
651 | } | |
652 | ||
653 | static ssize_t | |
654 | trip_point_type_show(struct device *dev, struct device_attribute *attr, | |
655 | char *buf) | |
656 | { | |
657 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
658 | enum thermal_trip_type type; |
659 | int trip, result; | |
203d3d4a ZR |
660 | |
661 | if (!tz->ops->get_trip_type) | |
662 | return -EPERM; | |
663 | ||
664 | if (!sscanf(attr->attr.name, "trip_point_%d_type", &trip)) | |
665 | return -EINVAL; | |
666 | ||
6503e5df MG |
667 | result = tz->ops->get_trip_type(tz, trip, &type); |
668 | if (result) | |
669 | return result; | |
670 | ||
671 | switch (type) { | |
672 | case THERMAL_TRIP_CRITICAL: | |
625120a4 | 673 | return sprintf(buf, "critical\n"); |
6503e5df | 674 | case THERMAL_TRIP_HOT: |
625120a4 | 675 | return sprintf(buf, "hot\n"); |
6503e5df | 676 | case THERMAL_TRIP_PASSIVE: |
625120a4 | 677 | return sprintf(buf, "passive\n"); |
6503e5df | 678 | case THERMAL_TRIP_ACTIVE: |
625120a4 | 679 | return sprintf(buf, "active\n"); |
6503e5df | 680 | default: |
625120a4 | 681 | return sprintf(buf, "unknown\n"); |
6503e5df | 682 | } |
203d3d4a ZR |
683 | } |
684 | ||
c56f5c03 D |
685 | static ssize_t |
686 | trip_point_temp_store(struct device *dev, struct device_attribute *attr, | |
687 | const char *buf, size_t count) | |
688 | { | |
689 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
690 | int trip, ret; | |
691 | unsigned long temperature; | |
692 | ||
693 | if (!tz->ops->set_trip_temp) | |
694 | return -EPERM; | |
695 | ||
696 | if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip)) | |
697 | return -EINVAL; | |
698 | ||
699 | if (kstrtoul(buf, 10, &temperature)) | |
700 | return -EINVAL; | |
701 | ||
702 | ret = tz->ops->set_trip_temp(tz, trip, temperature); | |
ad74e46c KM |
703 | if (ret) |
704 | return ret; | |
c56f5c03 | 705 | |
ad74e46c KM |
706 | thermal_zone_device_update(tz); |
707 | ||
708 | return count; | |
c56f5c03 D |
709 | } |
710 | ||
203d3d4a ZR |
711 | static ssize_t |
712 | trip_point_temp_show(struct device *dev, struct device_attribute *attr, | |
713 | char *buf) | |
714 | { | |
715 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df | 716 | int trip, ret; |
17e8351a | 717 | int temperature; |
203d3d4a ZR |
718 | |
719 | if (!tz->ops->get_trip_temp) | |
720 | return -EPERM; | |
721 | ||
722 | if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip)) | |
723 | return -EINVAL; | |
724 | ||
6503e5df MG |
725 | ret = tz->ops->get_trip_temp(tz, trip, &temperature); |
726 | ||
727 | if (ret) | |
728 | return ret; | |
729 | ||
17e8351a | 730 | return sprintf(buf, "%d\n", temperature); |
203d3d4a ZR |
731 | } |
732 | ||
27365a6c D |
733 | static ssize_t |
734 | trip_point_hyst_store(struct device *dev, struct device_attribute *attr, | |
735 | const char *buf, size_t count) | |
736 | { | |
737 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
738 | int trip, ret; | |
17e8351a | 739 | int temperature; |
27365a6c D |
740 | |
741 | if (!tz->ops->set_trip_hyst) | |
742 | return -EPERM; | |
743 | ||
744 | if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip)) | |
745 | return -EINVAL; | |
746 | ||
17e8351a | 747 | if (kstrtoint(buf, 10, &temperature)) |
27365a6c D |
748 | return -EINVAL; |
749 | ||
750 | /* | |
751 | * We are not doing any check on the 'temperature' value | |
752 | * here. The driver implementing 'set_trip_hyst' has to | |
753 | * take care of this. | |
754 | */ | |
755 | ret = tz->ops->set_trip_hyst(tz, trip, temperature); | |
756 | ||
757 | return ret ? ret : count; | |
758 | } | |
759 | ||
760 | static ssize_t | |
761 | trip_point_hyst_show(struct device *dev, struct device_attribute *attr, | |
762 | char *buf) | |
763 | { | |
764 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
765 | int trip, ret; | |
17e8351a | 766 | int temperature; |
27365a6c D |
767 | |
768 | if (!tz->ops->get_trip_hyst) | |
769 | return -EPERM; | |
770 | ||
771 | if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip)) | |
772 | return -EINVAL; | |
773 | ||
774 | ret = tz->ops->get_trip_hyst(tz, trip, &temperature); | |
775 | ||
17e8351a | 776 | return ret ? ret : sprintf(buf, "%d\n", temperature); |
27365a6c D |
777 | } |
778 | ||
03a971a2 MG |
779 | static ssize_t |
780 | passive_store(struct device *dev, struct device_attribute *attr, | |
781 | const char *buf, size_t count) | |
782 | { | |
783 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
784 | struct thermal_cooling_device *cdev = NULL; | |
785 | int state; | |
786 | ||
787 | if (!sscanf(buf, "%d\n", &state)) | |
788 | return -EINVAL; | |
789 | ||
3d8e3ad8 FP |
790 | /* sanity check: values below 1000 millicelcius don't make sense |
791 | * and can cause the system to go into a thermal heart attack | |
792 | */ | |
793 | if (state && state < 1000) | |
794 | return -EINVAL; | |
795 | ||
03a971a2 MG |
796 | if (state && !tz->forced_passive) { |
797 | mutex_lock(&thermal_list_lock); | |
798 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
799 | if (!strncmp("Processor", cdev->type, | |
800 | sizeof("Processor"))) | |
801 | thermal_zone_bind_cooling_device(tz, | |
9d99842f ZR |
802 | THERMAL_TRIPS_NONE, cdev, |
803 | THERMAL_NO_LIMIT, | |
6cd9e9f6 KS |
804 | THERMAL_NO_LIMIT, |
805 | THERMAL_WEIGHT_DEFAULT); | |
03a971a2 MG |
806 | } |
807 | mutex_unlock(&thermal_list_lock); | |
e4143b03 FP |
808 | if (!tz->passive_delay) |
809 | tz->passive_delay = 1000; | |
03a971a2 MG |
810 | } else if (!state && tz->forced_passive) { |
811 | mutex_lock(&thermal_list_lock); | |
812 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
813 | if (!strncmp("Processor", cdev->type, | |
814 | sizeof("Processor"))) | |
815 | thermal_zone_unbind_cooling_device(tz, | |
816 | THERMAL_TRIPS_NONE, | |
817 | cdev); | |
818 | } | |
819 | mutex_unlock(&thermal_list_lock); | |
e4143b03 | 820 | tz->passive_delay = 0; |
03a971a2 MG |
821 | } |
822 | ||
03a971a2 MG |
823 | tz->forced_passive = state; |
824 | ||
825 | thermal_zone_device_update(tz); | |
826 | ||
827 | return count; | |
828 | } | |
829 | ||
830 | static ssize_t | |
831 | passive_show(struct device *dev, struct device_attribute *attr, | |
832 | char *buf) | |
833 | { | |
834 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
835 | ||
836 | return sprintf(buf, "%d\n", tz->forced_passive); | |
837 | } | |
838 | ||
5a2c090b D |
839 | static ssize_t |
840 | policy_store(struct device *dev, struct device_attribute *attr, | |
841 | const char *buf, size_t count) | |
842 | { | |
843 | int ret = -EINVAL; | |
844 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
845 | struct thermal_governor *gov; | |
42a5bf50 AS |
846 | char name[THERMAL_NAME_LENGTH]; |
847 | ||
848 | snprintf(name, sizeof(name), "%s", buf); | |
5a2c090b D |
849 | |
850 | mutex_lock(&thermal_governor_lock); | |
b6cc772f | 851 | mutex_lock(&tz->lock); |
5a2c090b | 852 | |
42a5bf50 | 853 | gov = __find_governor(strim(name)); |
5a2c090b D |
854 | if (!gov) |
855 | goto exit; | |
856 | ||
e33df1d2 JM |
857 | ret = thermal_set_governor(tz, gov); |
858 | if (!ret) | |
859 | ret = count; | |
5a2c090b D |
860 | |
861 | exit: | |
b6cc772f | 862 | mutex_unlock(&tz->lock); |
5a2c090b D |
863 | mutex_unlock(&thermal_governor_lock); |
864 | return ret; | |
865 | } | |
866 | ||
867 | static ssize_t | |
868 | policy_show(struct device *dev, struct device_attribute *devattr, char *buf) | |
869 | { | |
870 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
871 | ||
872 | return sprintf(buf, "%s\n", tz->governor->name); | |
873 | } | |
874 | ||
25a0a5ce NW |
875 | static ssize_t |
876 | available_policies_show(struct device *dev, struct device_attribute *devattr, | |
877 | char *buf) | |
878 | { | |
879 | struct thermal_governor *pos; | |
880 | ssize_t count = 0; | |
881 | ssize_t size = PAGE_SIZE; | |
882 | ||
883 | mutex_lock(&thermal_governor_lock); | |
884 | ||
885 | list_for_each_entry(pos, &thermal_governor_list, governor_list) { | |
886 | size = PAGE_SIZE - count; | |
887 | count += scnprintf(buf + count, size, "%s ", pos->name); | |
888 | } | |
889 | count += scnprintf(buf + count, size, "\n"); | |
890 | ||
891 | mutex_unlock(&thermal_governor_lock); | |
892 | ||
893 | return count; | |
894 | } | |
895 | ||
e6e238c3 ADK |
896 | static ssize_t |
897 | emul_temp_store(struct device *dev, struct device_attribute *attr, | |
898 | const char *buf, size_t count) | |
899 | { | |
900 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
901 | int ret = 0; | |
902 | unsigned long temperature; | |
903 | ||
904 | if (kstrtoul(buf, 10, &temperature)) | |
905 | return -EINVAL; | |
906 | ||
907 | if (!tz->ops->set_emul_temp) { | |
908 | mutex_lock(&tz->lock); | |
909 | tz->emul_temperature = temperature; | |
910 | mutex_unlock(&tz->lock); | |
911 | } else { | |
912 | ret = tz->ops->set_emul_temp(tz, temperature); | |
913 | } | |
914 | ||
800744bf T |
915 | if (!ret) |
916 | thermal_zone_device_update(tz); | |
917 | ||
e6e238c3 ADK |
918 | return ret ? ret : count; |
919 | } | |
920 | static DEVICE_ATTR(emul_temp, S_IWUSR, NULL, emul_temp_store); | |
e6e238c3 | 921 | |
9f38271c JM |
922 | static ssize_t |
923 | sustainable_power_show(struct device *dev, struct device_attribute *devattr, | |
924 | char *buf) | |
925 | { | |
926 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
927 | ||
928 | if (tz->tzp) | |
929 | return sprintf(buf, "%u\n", tz->tzp->sustainable_power); | |
930 | else | |
931 | return -EIO; | |
932 | } | |
933 | ||
934 | static ssize_t | |
935 | sustainable_power_store(struct device *dev, struct device_attribute *devattr, | |
936 | const char *buf, size_t count) | |
937 | { | |
938 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
939 | u32 sustainable_power; | |
940 | ||
941 | if (!tz->tzp) | |
942 | return -EIO; | |
943 | ||
944 | if (kstrtou32(buf, 10, &sustainable_power)) | |
945 | return -EINVAL; | |
946 | ||
947 | tz->tzp->sustainable_power = sustainable_power; | |
948 | ||
949 | return count; | |
950 | } | |
951 | static DEVICE_ATTR(sustainable_power, S_IWUSR | S_IRUGO, sustainable_power_show, | |
952 | sustainable_power_store); | |
953 | ||
954 | #define create_s32_tzp_attr(name) \ | |
955 | static ssize_t \ | |
956 | name##_show(struct device *dev, struct device_attribute *devattr, \ | |
957 | char *buf) \ | |
958 | { \ | |
959 | struct thermal_zone_device *tz = to_thermal_zone(dev); \ | |
960 | \ | |
961 | if (tz->tzp) \ | |
962 | return sprintf(buf, "%u\n", tz->tzp->name); \ | |
963 | else \ | |
964 | return -EIO; \ | |
965 | } \ | |
966 | \ | |
967 | static ssize_t \ | |
968 | name##_store(struct device *dev, struct device_attribute *devattr, \ | |
969 | const char *buf, size_t count) \ | |
970 | { \ | |
971 | struct thermal_zone_device *tz = to_thermal_zone(dev); \ | |
972 | s32 value; \ | |
973 | \ | |
974 | if (!tz->tzp) \ | |
975 | return -EIO; \ | |
976 | \ | |
977 | if (kstrtos32(buf, 10, &value)) \ | |
978 | return -EINVAL; \ | |
979 | \ | |
980 | tz->tzp->name = value; \ | |
981 | \ | |
982 | return count; \ | |
983 | } \ | |
984 | static DEVICE_ATTR(name, S_IWUSR | S_IRUGO, name##_show, name##_store) | |
985 | ||
986 | create_s32_tzp_attr(k_po); | |
987 | create_s32_tzp_attr(k_pu); | |
988 | create_s32_tzp_attr(k_i); | |
989 | create_s32_tzp_attr(k_d); | |
990 | create_s32_tzp_attr(integral_cutoff); | |
9d0be7f4 EV |
991 | create_s32_tzp_attr(slope); |
992 | create_s32_tzp_attr(offset); | |
9f38271c JM |
993 | #undef create_s32_tzp_attr |
994 | ||
995 | static struct device_attribute *dev_tzp_attrs[] = { | |
996 | &dev_attr_sustainable_power, | |
997 | &dev_attr_k_po, | |
998 | &dev_attr_k_pu, | |
999 | &dev_attr_k_i, | |
1000 | &dev_attr_k_d, | |
1001 | &dev_attr_integral_cutoff, | |
9d0be7f4 EV |
1002 | &dev_attr_slope, |
1003 | &dev_attr_offset, | |
9f38271c JM |
1004 | }; |
1005 | ||
1006 | static int create_tzp_attrs(struct device *dev) | |
1007 | { | |
1008 | int i; | |
1009 | ||
1010 | for (i = 0; i < ARRAY_SIZE(dev_tzp_attrs); i++) { | |
1011 | int ret; | |
1012 | struct device_attribute *dev_attr = dev_tzp_attrs[i]; | |
1013 | ||
1014 | ret = device_create_file(dev, dev_attr); | |
1015 | if (ret) | |
1016 | return ret; | |
1017 | } | |
1018 | ||
1019 | return 0; | |
1020 | } | |
1021 | ||
35b11d2e JM |
1022 | /** |
1023 | * power_actor_get_max_power() - get the maximum power that a cdev can consume | |
1024 | * @cdev: pointer to &thermal_cooling_device | |
1025 | * @tz: a valid thermal zone device pointer | |
1026 | * @max_power: pointer in which to store the maximum power | |
1027 | * | |
1028 | * Calculate the maximum power consumption in milliwats that the | |
1029 | * cooling device can currently consume and store it in @max_power. | |
1030 | * | |
1031 | * Return: 0 on success, -EINVAL if @cdev doesn't support the | |
1032 | * power_actor API or -E* on other error. | |
1033 | */ | |
1034 | int power_actor_get_max_power(struct thermal_cooling_device *cdev, | |
1035 | struct thermal_zone_device *tz, u32 *max_power) | |
1036 | { | |
1037 | if (!cdev_is_power_actor(cdev)) | |
1038 | return -EINVAL; | |
1039 | ||
1040 | return cdev->ops->state2power(cdev, tz, 0, max_power); | |
1041 | } | |
1042 | ||
c973c3bc JM |
1043 | /** |
1044 | * power_actor_get_min_power() - get the mainimum power that a cdev can consume | |
1045 | * @cdev: pointer to &thermal_cooling_device | |
1046 | * @tz: a valid thermal zone device pointer | |
1047 | * @min_power: pointer in which to store the minimum power | |
1048 | * | |
1049 | * Calculate the minimum power consumption in milliwatts that the | |
1050 | * cooling device can currently consume and store it in @min_power. | |
1051 | * | |
1052 | * Return: 0 on success, -EINVAL if @cdev doesn't support the | |
1053 | * power_actor API or -E* on other error. | |
1054 | */ | |
1055 | int power_actor_get_min_power(struct thermal_cooling_device *cdev, | |
1056 | struct thermal_zone_device *tz, u32 *min_power) | |
1057 | { | |
1058 | unsigned long max_state; | |
1059 | int ret; | |
1060 | ||
1061 | if (!cdev_is_power_actor(cdev)) | |
1062 | return -EINVAL; | |
1063 | ||
1064 | ret = cdev->ops->get_max_state(cdev, &max_state); | |
1065 | if (ret) | |
1066 | return ret; | |
1067 | ||
1068 | return cdev->ops->state2power(cdev, tz, max_state, min_power); | |
1069 | } | |
1070 | ||
35b11d2e JM |
1071 | /** |
1072 | * power_actor_set_power() - limit the maximum power that a cooling device can consume | |
1073 | * @cdev: pointer to &thermal_cooling_device | |
1074 | * @instance: thermal instance to update | |
1075 | * @power: the power in milliwatts | |
1076 | * | |
1077 | * Set the cooling device to consume at most @power milliwatts. | |
1078 | * | |
1079 | * Return: 0 on success, -EINVAL if the cooling device does not | |
1080 | * implement the power actor API or -E* for other failures. | |
1081 | */ | |
1082 | int power_actor_set_power(struct thermal_cooling_device *cdev, | |
1083 | struct thermal_instance *instance, u32 power) | |
1084 | { | |
1085 | unsigned long state; | |
1086 | int ret; | |
1087 | ||
1088 | if (!cdev_is_power_actor(cdev)) | |
1089 | return -EINVAL; | |
1090 | ||
1091 | ret = cdev->ops->power2state(cdev, instance->tz, power, &state); | |
1092 | if (ret) | |
1093 | return ret; | |
1094 | ||
1095 | instance->target = state; | |
1096 | cdev->updated = false; | |
1097 | thermal_cdev_update(cdev); | |
1098 | ||
1099 | return 0; | |
1100 | } | |
1101 | ||
203d3d4a ZR |
1102 | static DEVICE_ATTR(type, 0444, type_show, NULL); |
1103 | static DEVICE_ATTR(temp, 0444, temp_show, NULL); | |
1104 | static DEVICE_ATTR(mode, 0644, mode_show, mode_store); | |
886ee546 | 1105 | static DEVICE_ATTR(passive, S_IRUGO | S_IWUSR, passive_show, passive_store); |
5a2c090b | 1106 | static DEVICE_ATTR(policy, S_IRUGO | S_IWUSR, policy_show, policy_store); |
25a0a5ce | 1107 | static DEVICE_ATTR(available_policies, S_IRUGO, available_policies_show, NULL); |
203d3d4a | 1108 | |
203d3d4a ZR |
1109 | /* sys I/F for cooling device */ |
1110 | #define to_cooling_device(_dev) \ | |
1111 | container_of(_dev, struct thermal_cooling_device, device) | |
1112 | ||
1113 | static ssize_t | |
1114 | thermal_cooling_device_type_show(struct device *dev, | |
1115 | struct device_attribute *attr, char *buf) | |
1116 | { | |
1117 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
1118 | ||
1119 | return sprintf(buf, "%s\n", cdev->type); | |
1120 | } | |
1121 | ||
1122 | static ssize_t | |
1123 | thermal_cooling_device_max_state_show(struct device *dev, | |
1124 | struct device_attribute *attr, char *buf) | |
1125 | { | |
1126 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df MG |
1127 | unsigned long state; |
1128 | int ret; | |
203d3d4a | 1129 | |
6503e5df MG |
1130 | ret = cdev->ops->get_max_state(cdev, &state); |
1131 | if (ret) | |
1132 | return ret; | |
1133 | return sprintf(buf, "%ld\n", state); | |
203d3d4a ZR |
1134 | } |
1135 | ||
1136 | static ssize_t | |
1137 | thermal_cooling_device_cur_state_show(struct device *dev, | |
1138 | struct device_attribute *attr, char *buf) | |
1139 | { | |
1140 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df MG |
1141 | unsigned long state; |
1142 | int ret; | |
203d3d4a | 1143 | |
6503e5df MG |
1144 | ret = cdev->ops->get_cur_state(cdev, &state); |
1145 | if (ret) | |
1146 | return ret; | |
1147 | return sprintf(buf, "%ld\n", state); | |
203d3d4a ZR |
1148 | } |
1149 | ||
1150 | static ssize_t | |
1151 | thermal_cooling_device_cur_state_store(struct device *dev, | |
1152 | struct device_attribute *attr, | |
1153 | const char *buf, size_t count) | |
1154 | { | |
1155 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df | 1156 | unsigned long state; |
203d3d4a ZR |
1157 | int result; |
1158 | ||
6503e5df | 1159 | if (!sscanf(buf, "%ld\n", &state)) |
203d3d4a ZR |
1160 | return -EINVAL; |
1161 | ||
edb94918 | 1162 | if ((long)state < 0) |
203d3d4a ZR |
1163 | return -EINVAL; |
1164 | ||
1165 | result = cdev->ops->set_cur_state(cdev, state); | |
1166 | if (result) | |
1167 | return result; | |
1168 | return count; | |
1169 | } | |
1170 | ||
1171 | static struct device_attribute dev_attr_cdev_type = | |
543a9561 | 1172 | __ATTR(type, 0444, thermal_cooling_device_type_show, NULL); |
203d3d4a ZR |
1173 | static DEVICE_ATTR(max_state, 0444, |
1174 | thermal_cooling_device_max_state_show, NULL); | |
1175 | static DEVICE_ATTR(cur_state, 0644, | |
1176 | thermal_cooling_device_cur_state_show, | |
1177 | thermal_cooling_device_cur_state_store); | |
1178 | ||
1179 | static ssize_t | |
1180 | thermal_cooling_device_trip_point_show(struct device *dev, | |
543a9561 | 1181 | struct device_attribute *attr, char *buf) |
203d3d4a | 1182 | { |
b81b6ba3 | 1183 | struct thermal_instance *instance; |
203d3d4a ZR |
1184 | |
1185 | instance = | |
b81b6ba3 | 1186 | container_of(attr, struct thermal_instance, attr); |
203d3d4a ZR |
1187 | |
1188 | if (instance->trip == THERMAL_TRIPS_NONE) | |
1189 | return sprintf(buf, "-1\n"); | |
1190 | else | |
1191 | return sprintf(buf, "%d\n", instance->trip); | |
1192 | } | |
1193 | ||
2dc10f89 MK |
1194 | static struct attribute *cooling_device_attrs[] = { |
1195 | &dev_attr_cdev_type.attr, | |
1196 | &dev_attr_max_state.attr, | |
1197 | &dev_attr_cur_state.attr, | |
1198 | NULL, | |
1199 | }; | |
1200 | ||
1201 | static const struct attribute_group cooling_device_attr_group = { | |
1202 | .attrs = cooling_device_attrs, | |
1203 | }; | |
1204 | ||
1205 | static const struct attribute_group *cooling_device_attr_groups[] = { | |
1206 | &cooling_device_attr_group, | |
1207 | NULL, | |
1208 | }; | |
1209 | ||
db916513 JM |
1210 | static ssize_t |
1211 | thermal_cooling_device_weight_show(struct device *dev, | |
1212 | struct device_attribute *attr, char *buf) | |
1213 | { | |
1214 | struct thermal_instance *instance; | |
1215 | ||
1216 | instance = container_of(attr, struct thermal_instance, weight_attr); | |
1217 | ||
1218 | return sprintf(buf, "%d\n", instance->weight); | |
1219 | } | |
1220 | ||
1221 | static ssize_t | |
1222 | thermal_cooling_device_weight_store(struct device *dev, | |
1223 | struct device_attribute *attr, | |
1224 | const char *buf, size_t count) | |
1225 | { | |
1226 | struct thermal_instance *instance; | |
1227 | int ret, weight; | |
1228 | ||
1229 | ret = kstrtoint(buf, 0, &weight); | |
1230 | if (ret) | |
1231 | return ret; | |
1232 | ||
1233 | instance = container_of(attr, struct thermal_instance, weight_attr); | |
1234 | instance->weight = weight; | |
1235 | ||
1236 | return count; | |
1237 | } | |
203d3d4a ZR |
1238 | /* Device management */ |
1239 | ||
1240 | /** | |
d2e4eb83 EV |
1241 | * thermal_zone_bind_cooling_device() - bind a cooling device to a thermal zone |
1242 | * @tz: pointer to struct thermal_zone_device | |
203d3d4a ZR |
1243 | * @trip: indicates which trip point the cooling devices is |
1244 | * associated with in this thermal zone. | |
d2e4eb83 EV |
1245 | * @cdev: pointer to struct thermal_cooling_device |
1246 | * @upper: the Maximum cooling state for this trip point. | |
1247 | * THERMAL_NO_LIMIT means no upper limit, | |
1248 | * and the cooling device can be in max_state. | |
1249 | * @lower: the Minimum cooling state can be used for this trip point. | |
1250 | * THERMAL_NO_LIMIT means no lower limit, | |
1251 | * and the cooling device can be in cooling state 0. | |
6cd9e9f6 KS |
1252 | * @weight: The weight of the cooling device to be bound to the |
1253 | * thermal zone. Use THERMAL_WEIGHT_DEFAULT for the | |
1254 | * default value | |
543a9561 | 1255 | * |
d2e4eb83 EV |
1256 | * This interface function bind a thermal cooling device to the certain trip |
1257 | * point of a thermal zone device. | |
543a9561 | 1258 | * This function is usually called in the thermal zone device .bind callback. |
d2e4eb83 EV |
1259 | * |
1260 | * Return: 0 on success, the proper error value otherwise. | |
203d3d4a ZR |
1261 | */ |
1262 | int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, | |
1263 | int trip, | |
9d99842f | 1264 | struct thermal_cooling_device *cdev, |
6cd9e9f6 KS |
1265 | unsigned long upper, unsigned long lower, |
1266 | unsigned int weight) | |
203d3d4a | 1267 | { |
b81b6ba3 ZR |
1268 | struct thermal_instance *dev; |
1269 | struct thermal_instance *pos; | |
c7516709 TS |
1270 | struct thermal_zone_device *pos1; |
1271 | struct thermal_cooling_device *pos2; | |
74051ba5 | 1272 | unsigned long max_state; |
9a3031dc | 1273 | int result, ret; |
203d3d4a | 1274 | |
543a9561 | 1275 | if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE)) |
203d3d4a ZR |
1276 | return -EINVAL; |
1277 | ||
c7516709 TS |
1278 | list_for_each_entry(pos1, &thermal_tz_list, node) { |
1279 | if (pos1 == tz) | |
1280 | break; | |
1281 | } | |
1282 | list_for_each_entry(pos2, &thermal_cdev_list, node) { | |
1283 | if (pos2 == cdev) | |
1284 | break; | |
1285 | } | |
1286 | ||
1287 | if (tz != pos1 || cdev != pos2) | |
203d3d4a ZR |
1288 | return -EINVAL; |
1289 | ||
9a3031dc LM |
1290 | ret = cdev->ops->get_max_state(cdev, &max_state); |
1291 | if (ret) | |
1292 | return ret; | |
9d99842f ZR |
1293 | |
1294 | /* lower default 0, upper default max_state */ | |
1295 | lower = lower == THERMAL_NO_LIMIT ? 0 : lower; | |
1296 | upper = upper == THERMAL_NO_LIMIT ? max_state : upper; | |
1297 | ||
1298 | if (lower > upper || upper > max_state) | |
1299 | return -EINVAL; | |
1300 | ||
203d3d4a | 1301 | dev = |
b81b6ba3 | 1302 | kzalloc(sizeof(struct thermal_instance), GFP_KERNEL); |
203d3d4a ZR |
1303 | if (!dev) |
1304 | return -ENOMEM; | |
1305 | dev->tz = tz; | |
1306 | dev->cdev = cdev; | |
1307 | dev->trip = trip; | |
9d99842f ZR |
1308 | dev->upper = upper; |
1309 | dev->lower = lower; | |
ce119f83 | 1310 | dev->target = THERMAL_NO_TARGET; |
6cd9e9f6 | 1311 | dev->weight = weight; |
74051ba5 | 1312 | |
203d3d4a ZR |
1313 | result = get_idr(&tz->idr, &tz->lock, &dev->id); |
1314 | if (result) | |
1315 | goto free_mem; | |
1316 | ||
1317 | sprintf(dev->name, "cdev%d", dev->id); | |
1318 | result = | |
1319 | sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev->name); | |
1320 | if (result) | |
1321 | goto release_idr; | |
1322 | ||
1323 | sprintf(dev->attr_name, "cdev%d_trip_point", dev->id); | |
975f8c56 | 1324 | sysfs_attr_init(&dev->attr.attr); |
203d3d4a ZR |
1325 | dev->attr.attr.name = dev->attr_name; |
1326 | dev->attr.attr.mode = 0444; | |
1327 | dev->attr.show = thermal_cooling_device_trip_point_show; | |
1328 | result = device_create_file(&tz->device, &dev->attr); | |
1329 | if (result) | |
1330 | goto remove_symbol_link; | |
1331 | ||
db916513 JM |
1332 | sprintf(dev->weight_attr_name, "cdev%d_weight", dev->id); |
1333 | sysfs_attr_init(&dev->weight_attr.attr); | |
1334 | dev->weight_attr.attr.name = dev->weight_attr_name; | |
1335 | dev->weight_attr.attr.mode = S_IWUSR | S_IRUGO; | |
1336 | dev->weight_attr.show = thermal_cooling_device_weight_show; | |
1337 | dev->weight_attr.store = thermal_cooling_device_weight_store; | |
1338 | result = device_create_file(&tz->device, &dev->weight_attr); | |
1339 | if (result) | |
1340 | goto remove_trip_file; | |
1341 | ||
203d3d4a | 1342 | mutex_lock(&tz->lock); |
f4a821ce | 1343 | mutex_lock(&cdev->lock); |
cddf31b3 | 1344 | list_for_each_entry(pos, &tz->thermal_instances, tz_node) |
203d3d4a ZR |
1345 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
1346 | result = -EEXIST; | |
1347 | break; | |
1348 | } | |
b5e4ae62 | 1349 | if (!result) { |
cddf31b3 | 1350 | list_add_tail(&dev->tz_node, &tz->thermal_instances); |
b5e4ae62 | 1351 | list_add_tail(&dev->cdev_node, &cdev->thermal_instances); |
4511f716 | 1352 | atomic_set(&tz->need_update, 1); |
b5e4ae62 | 1353 | } |
f4a821ce | 1354 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
1355 | mutex_unlock(&tz->lock); |
1356 | ||
1357 | if (!result) | |
1358 | return 0; | |
1359 | ||
db916513 JM |
1360 | device_remove_file(&tz->device, &dev->weight_attr); |
1361 | remove_trip_file: | |
203d3d4a | 1362 | device_remove_file(&tz->device, &dev->attr); |
caca8b80 | 1363 | remove_symbol_link: |
203d3d4a | 1364 | sysfs_remove_link(&tz->device.kobj, dev->name); |
caca8b80 | 1365 | release_idr: |
203d3d4a | 1366 | release_idr(&tz->idr, &tz->lock, dev->id); |
caca8b80 | 1367 | free_mem: |
203d3d4a ZR |
1368 | kfree(dev); |
1369 | return result; | |
1370 | } | |
910cb1e3 | 1371 | EXPORT_SYMBOL_GPL(thermal_zone_bind_cooling_device); |
203d3d4a ZR |
1372 | |
1373 | /** | |
9892e5dc EV |
1374 | * thermal_zone_unbind_cooling_device() - unbind a cooling device from a |
1375 | * thermal zone. | |
1376 | * @tz: pointer to a struct thermal_zone_device. | |
203d3d4a ZR |
1377 | * @trip: indicates which trip point the cooling devices is |
1378 | * associated with in this thermal zone. | |
9892e5dc | 1379 | * @cdev: pointer to a struct thermal_cooling_device. |
543a9561 | 1380 | * |
9892e5dc EV |
1381 | * This interface function unbind a thermal cooling device from the certain |
1382 | * trip point of a thermal zone device. | |
543a9561 | 1383 | * This function is usually called in the thermal zone device .unbind callback. |
9892e5dc EV |
1384 | * |
1385 | * Return: 0 on success, the proper error value otherwise. | |
203d3d4a ZR |
1386 | */ |
1387 | int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz, | |
1388 | int trip, | |
1389 | struct thermal_cooling_device *cdev) | |
1390 | { | |
b81b6ba3 | 1391 | struct thermal_instance *pos, *next; |
203d3d4a ZR |
1392 | |
1393 | mutex_lock(&tz->lock); | |
f4a821ce | 1394 | mutex_lock(&cdev->lock); |
cddf31b3 | 1395 | list_for_each_entry_safe(pos, next, &tz->thermal_instances, tz_node) { |
543a9561 | 1396 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
cddf31b3 | 1397 | list_del(&pos->tz_node); |
b5e4ae62 | 1398 | list_del(&pos->cdev_node); |
f4a821ce | 1399 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
1400 | mutex_unlock(&tz->lock); |
1401 | goto unbind; | |
1402 | } | |
1403 | } | |
f4a821ce | 1404 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
1405 | mutex_unlock(&tz->lock); |
1406 | ||
1407 | return -ENODEV; | |
1408 | ||
caca8b80 | 1409 | unbind: |
528464ea | 1410 | device_remove_file(&tz->device, &pos->weight_attr); |
203d3d4a ZR |
1411 | device_remove_file(&tz->device, &pos->attr); |
1412 | sysfs_remove_link(&tz->device.kobj, pos->name); | |
1413 | release_idr(&tz->idr, &tz->lock, pos->id); | |
1414 | kfree(pos); | |
1415 | return 0; | |
1416 | } | |
910cb1e3 | 1417 | EXPORT_SYMBOL_GPL(thermal_zone_unbind_cooling_device); |
203d3d4a ZR |
1418 | |
1419 | static void thermal_release(struct device *dev) | |
1420 | { | |
1421 | struct thermal_zone_device *tz; | |
1422 | struct thermal_cooling_device *cdev; | |
1423 | ||
caca8b80 JP |
1424 | if (!strncmp(dev_name(dev), "thermal_zone", |
1425 | sizeof("thermal_zone") - 1)) { | |
203d3d4a ZR |
1426 | tz = to_thermal_zone(dev); |
1427 | kfree(tz); | |
732e4c8d | 1428 | } else if(!strncmp(dev_name(dev), "cooling_device", |
1429 | sizeof("cooling_device") - 1)){ | |
203d3d4a ZR |
1430 | cdev = to_cooling_device(dev); |
1431 | kfree(cdev); | |
1432 | } | |
1433 | } | |
1434 | ||
1435 | static struct class thermal_class = { | |
1436 | .name = "thermal", | |
1437 | .dev_release = thermal_release, | |
1438 | }; | |
1439 | ||
1440 | /** | |
a116b5d4 EV |
1441 | * __thermal_cooling_device_register() - register a new thermal cooling device |
1442 | * @np: a pointer to a device tree node. | |
203d3d4a ZR |
1443 | * @type: the thermal cooling device type. |
1444 | * @devdata: device private data. | |
1445 | * @ops: standard thermal cooling devices callbacks. | |
3a6eccb3 EV |
1446 | * |
1447 | * This interface function adds a new thermal cooling device (fan/processor/...) | |
1448 | * to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself | |
1449 | * to all the thermal zone devices registered at the same time. | |
a116b5d4 EV |
1450 | * It also gives the opportunity to link the cooling device to a device tree |
1451 | * node, so that it can be bound to a thermal zone created out of device tree. | |
3a6eccb3 EV |
1452 | * |
1453 | * Return: a pointer to the created struct thermal_cooling_device or an | |
1454 | * ERR_PTR. Caller must check return value with IS_ERR*() helpers. | |
203d3d4a | 1455 | */ |
a116b5d4 EV |
1456 | static struct thermal_cooling_device * |
1457 | __thermal_cooling_device_register(struct device_node *np, | |
1458 | char *type, void *devdata, | |
1459 | const struct thermal_cooling_device_ops *ops) | |
203d3d4a ZR |
1460 | { |
1461 | struct thermal_cooling_device *cdev; | |
4511f716 | 1462 | struct thermal_zone_device *pos = NULL; |
203d3d4a ZR |
1463 | int result; |
1464 | ||
204dd1d3 | 1465 | if (type && strlen(type) >= THERMAL_NAME_LENGTH) |
3e6fda5c | 1466 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1467 | |
1468 | if (!ops || !ops->get_max_state || !ops->get_cur_state || | |
543a9561 | 1469 | !ops->set_cur_state) |
3e6fda5c | 1470 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1471 | |
1472 | cdev = kzalloc(sizeof(struct thermal_cooling_device), GFP_KERNEL); | |
1473 | if (!cdev) | |
3e6fda5c | 1474 | return ERR_PTR(-ENOMEM); |
203d3d4a ZR |
1475 | |
1476 | result = get_idr(&thermal_cdev_idr, &thermal_idr_lock, &cdev->id); | |
1477 | if (result) { | |
1478 | kfree(cdev); | |
3e6fda5c | 1479 | return ERR_PTR(result); |
203d3d4a ZR |
1480 | } |
1481 | ||
c7a8b9d9 | 1482 | strlcpy(cdev->type, type ? : "", sizeof(cdev->type)); |
f4a821ce | 1483 | mutex_init(&cdev->lock); |
b5e4ae62 | 1484 | INIT_LIST_HEAD(&cdev->thermal_instances); |
a116b5d4 | 1485 | cdev->np = np; |
203d3d4a | 1486 | cdev->ops = ops; |
5ca0cce5 | 1487 | cdev->updated = false; |
203d3d4a | 1488 | cdev->device.class = &thermal_class; |
2dc10f89 | 1489 | cdev->device.groups = cooling_device_attr_groups; |
203d3d4a | 1490 | cdev->devdata = devdata; |
354655ea | 1491 | dev_set_name(&cdev->device, "cooling_device%d", cdev->id); |
203d3d4a ZR |
1492 | result = device_register(&cdev->device); |
1493 | if (result) { | |
1494 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
1495 | kfree(cdev); | |
3e6fda5c | 1496 | return ERR_PTR(result); |
203d3d4a ZR |
1497 | } |
1498 | ||
7e8ee1e9 | 1499 | /* Add 'this' new cdev to the global cdev list */ |
203d3d4a ZR |
1500 | mutex_lock(&thermal_list_lock); |
1501 | list_add(&cdev->node, &thermal_cdev_list); | |
203d3d4a ZR |
1502 | mutex_unlock(&thermal_list_lock); |
1503 | ||
7e8ee1e9 D |
1504 | /* Update binding information for 'this' new cdev */ |
1505 | bind_cdev(cdev); | |
1506 | ||
4511f716 CY |
1507 | mutex_lock(&thermal_list_lock); |
1508 | list_for_each_entry(pos, &thermal_tz_list, node) | |
1509 | if (atomic_cmpxchg(&pos->need_update, 1, 0)) | |
1510 | thermal_zone_device_update(pos); | |
1511 | mutex_unlock(&thermal_list_lock); | |
1512 | ||
7e8ee1e9 | 1513 | return cdev; |
203d3d4a | 1514 | } |
a116b5d4 EV |
1515 | |
1516 | /** | |
1517 | * thermal_cooling_device_register() - register a new thermal cooling device | |
1518 | * @type: the thermal cooling device type. | |
1519 | * @devdata: device private data. | |
1520 | * @ops: standard thermal cooling devices callbacks. | |
1521 | * | |
1522 | * This interface function adds a new thermal cooling device (fan/processor/...) | |
1523 | * to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself | |
1524 | * to all the thermal zone devices registered at the same time. | |
1525 | * | |
1526 | * Return: a pointer to the created struct thermal_cooling_device or an | |
1527 | * ERR_PTR. Caller must check return value with IS_ERR*() helpers. | |
1528 | */ | |
1529 | struct thermal_cooling_device * | |
1530 | thermal_cooling_device_register(char *type, void *devdata, | |
1531 | const struct thermal_cooling_device_ops *ops) | |
1532 | { | |
1533 | return __thermal_cooling_device_register(NULL, type, devdata, ops); | |
1534 | } | |
910cb1e3 | 1535 | EXPORT_SYMBOL_GPL(thermal_cooling_device_register); |
203d3d4a | 1536 | |
a116b5d4 EV |
1537 | /** |
1538 | * thermal_of_cooling_device_register() - register an OF thermal cooling device | |
1539 | * @np: a pointer to a device tree node. | |
1540 | * @type: the thermal cooling device type. | |
1541 | * @devdata: device private data. | |
1542 | * @ops: standard thermal cooling devices callbacks. | |
1543 | * | |
1544 | * This function will register a cooling device with device tree node reference. | |
1545 | * This interface function adds a new thermal cooling device (fan/processor/...) | |
1546 | * to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself | |
1547 | * to all the thermal zone devices registered at the same time. | |
1548 | * | |
1549 | * Return: a pointer to the created struct thermal_cooling_device or an | |
1550 | * ERR_PTR. Caller must check return value with IS_ERR*() helpers. | |
1551 | */ | |
1552 | struct thermal_cooling_device * | |
1553 | thermal_of_cooling_device_register(struct device_node *np, | |
1554 | char *type, void *devdata, | |
1555 | const struct thermal_cooling_device_ops *ops) | |
1556 | { | |
1557 | return __thermal_cooling_device_register(np, type, devdata, ops); | |
1558 | } | |
1559 | EXPORT_SYMBOL_GPL(thermal_of_cooling_device_register); | |
1560 | ||
203d3d4a ZR |
1561 | /** |
1562 | * thermal_cooling_device_unregister - removes the registered thermal cooling device | |
203d3d4a ZR |
1563 | * @cdev: the thermal cooling device to remove. |
1564 | * | |
1565 | * thermal_cooling_device_unregister() must be called when the device is no | |
1566 | * longer needed. | |
1567 | */ | |
7e8ee1e9 | 1568 | void thermal_cooling_device_unregister(struct thermal_cooling_device *cdev) |
203d3d4a | 1569 | { |
7e8ee1e9 D |
1570 | int i; |
1571 | const struct thermal_zone_params *tzp; | |
203d3d4a ZR |
1572 | struct thermal_zone_device *tz; |
1573 | struct thermal_cooling_device *pos = NULL; | |
1574 | ||
1575 | if (!cdev) | |
1576 | return; | |
1577 | ||
1578 | mutex_lock(&thermal_list_lock); | |
1579 | list_for_each_entry(pos, &thermal_cdev_list, node) | |
1580 | if (pos == cdev) | |
1581 | break; | |
1582 | if (pos != cdev) { | |
1583 | /* thermal cooling device not found */ | |
1584 | mutex_unlock(&thermal_list_lock); | |
1585 | return; | |
1586 | } | |
1587 | list_del(&cdev->node); | |
7e8ee1e9 D |
1588 | |
1589 | /* Unbind all thermal zones associated with 'this' cdev */ | |
203d3d4a | 1590 | list_for_each_entry(tz, &thermal_tz_list, node) { |
7e8ee1e9 D |
1591 | if (tz->ops->unbind) { |
1592 | tz->ops->unbind(tz, cdev); | |
1593 | continue; | |
1594 | } | |
1595 | ||
1596 | if (!tz->tzp || !tz->tzp->tbp) | |
203d3d4a | 1597 | continue; |
7e8ee1e9 D |
1598 | |
1599 | tzp = tz->tzp; | |
1600 | for (i = 0; i < tzp->num_tbps; i++) { | |
1601 | if (tzp->tbp[i].cdev == cdev) { | |
1602 | __unbind(tz, tzp->tbp[i].trip_mask, cdev); | |
1603 | tzp->tbp[i].cdev = NULL; | |
1604 | } | |
1605 | } | |
203d3d4a | 1606 | } |
7e8ee1e9 | 1607 | |
203d3d4a | 1608 | mutex_unlock(&thermal_list_lock); |
7e8ee1e9 | 1609 | |
203d3d4a | 1610 | if (cdev->type[0]) |
543a9561 | 1611 | device_remove_file(&cdev->device, &dev_attr_cdev_type); |
203d3d4a ZR |
1612 | device_remove_file(&cdev->device, &dev_attr_max_state); |
1613 | device_remove_file(&cdev->device, &dev_attr_cur_state); | |
1614 | ||
1615 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
1616 | device_unregister(&cdev->device); | |
1617 | return; | |
1618 | } | |
910cb1e3 | 1619 | EXPORT_SYMBOL_GPL(thermal_cooling_device_unregister); |
203d3d4a | 1620 | |
dc765482 | 1621 | void thermal_cdev_update(struct thermal_cooling_device *cdev) |
ce119f83 ZR |
1622 | { |
1623 | struct thermal_instance *instance; | |
1624 | unsigned long target = 0; | |
1625 | ||
1626 | /* cooling device is updated*/ | |
1627 | if (cdev->updated) | |
1628 | return; | |
1629 | ||
f4a821ce | 1630 | mutex_lock(&cdev->lock); |
ce119f83 ZR |
1631 | /* Make sure cdev enters the deepest cooling state */ |
1632 | list_for_each_entry(instance, &cdev->thermal_instances, cdev_node) { | |
06475b55 AL |
1633 | dev_dbg(&cdev->device, "zone%d->target=%lu\n", |
1634 | instance->tz->id, instance->target); | |
ce119f83 ZR |
1635 | if (instance->target == THERMAL_NO_TARGET) |
1636 | continue; | |
1637 | if (instance->target > target) | |
1638 | target = instance->target; | |
1639 | } | |
f4a821ce | 1640 | mutex_unlock(&cdev->lock); |
ce119f83 ZR |
1641 | cdev->ops->set_cur_state(cdev, target); |
1642 | cdev->updated = true; | |
39811569 | 1643 | trace_cdev_update(cdev, target); |
06475b55 | 1644 | dev_dbg(&cdev->device, "set to state %lu\n", target); |
ce119f83 | 1645 | } |
dc765482 | 1646 | EXPORT_SYMBOL(thermal_cdev_update); |
ce119f83 | 1647 | |
f2b4caaf | 1648 | /** |
7b73c993 | 1649 | * thermal_notify_framework - Sensor drivers use this API to notify framework |
f2b4caaf D |
1650 | * @tz: thermal zone device |
1651 | * @trip: indicates which trip point has been crossed | |
1652 | * | |
1653 | * This function handles the trip events from sensor drivers. It starts | |
1654 | * throttling the cooling devices according to the policy configured. | |
1655 | * For CRITICAL and HOT trip points, this notifies the respective drivers, | |
1656 | * and does actual throttling for other trip points i.e ACTIVE and PASSIVE. | |
1657 | * The throttling policy is based on the configured platform data; if no | |
1658 | * platform data is provided, this uses the step_wise throttling policy. | |
1659 | */ | |
7b73c993 | 1660 | void thermal_notify_framework(struct thermal_zone_device *tz, int trip) |
f2b4caaf D |
1661 | { |
1662 | handle_thermal_trip(tz, trip); | |
1663 | } | |
910cb1e3 | 1664 | EXPORT_SYMBOL_GPL(thermal_notify_framework); |
f2b4caaf | 1665 | |
c56f5c03 | 1666 | /** |
269c174f | 1667 | * create_trip_attrs() - create attributes for trip points |
c56f5c03 D |
1668 | * @tz: the thermal zone device |
1669 | * @mask: Writeable trip point bitmap. | |
269c174f EV |
1670 | * |
1671 | * helper function to instantiate sysfs entries for every trip | |
1672 | * point and its properties of a struct thermal_zone_device. | |
1673 | * | |
1674 | * Return: 0 on success, the proper error value otherwise. | |
c56f5c03 D |
1675 | */ |
1676 | static int create_trip_attrs(struct thermal_zone_device *tz, int mask) | |
1677 | { | |
1678 | int indx; | |
27365a6c | 1679 | int size = sizeof(struct thermal_attr) * tz->trips; |
c56f5c03 | 1680 | |
27365a6c | 1681 | tz->trip_type_attrs = kzalloc(size, GFP_KERNEL); |
c56f5c03 D |
1682 | if (!tz->trip_type_attrs) |
1683 | return -ENOMEM; | |
1684 | ||
27365a6c | 1685 | tz->trip_temp_attrs = kzalloc(size, GFP_KERNEL); |
c56f5c03 D |
1686 | if (!tz->trip_temp_attrs) { |
1687 | kfree(tz->trip_type_attrs); | |
1688 | return -ENOMEM; | |
1689 | } | |
1690 | ||
27365a6c D |
1691 | if (tz->ops->get_trip_hyst) { |
1692 | tz->trip_hyst_attrs = kzalloc(size, GFP_KERNEL); | |
1693 | if (!tz->trip_hyst_attrs) { | |
1694 | kfree(tz->trip_type_attrs); | |
1695 | kfree(tz->trip_temp_attrs); | |
1696 | return -ENOMEM; | |
1697 | } | |
1698 | } | |
c56f5c03 | 1699 | |
27365a6c D |
1700 | |
1701 | for (indx = 0; indx < tz->trips; indx++) { | |
c56f5c03 D |
1702 | /* create trip type attribute */ |
1703 | snprintf(tz->trip_type_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1704 | "trip_point_%d_type", indx); | |
1705 | ||
1706 | sysfs_attr_init(&tz->trip_type_attrs[indx].attr.attr); | |
1707 | tz->trip_type_attrs[indx].attr.attr.name = | |
1708 | tz->trip_type_attrs[indx].name; | |
1709 | tz->trip_type_attrs[indx].attr.attr.mode = S_IRUGO; | |
1710 | tz->trip_type_attrs[indx].attr.show = trip_point_type_show; | |
1711 | ||
1712 | device_create_file(&tz->device, | |
1713 | &tz->trip_type_attrs[indx].attr); | |
1714 | ||
1715 | /* create trip temp attribute */ | |
1716 | snprintf(tz->trip_temp_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1717 | "trip_point_%d_temp", indx); | |
1718 | ||
1719 | sysfs_attr_init(&tz->trip_temp_attrs[indx].attr.attr); | |
1720 | tz->trip_temp_attrs[indx].attr.attr.name = | |
1721 | tz->trip_temp_attrs[indx].name; | |
1722 | tz->trip_temp_attrs[indx].attr.attr.mode = S_IRUGO; | |
1723 | tz->trip_temp_attrs[indx].attr.show = trip_point_temp_show; | |
35e94644 PA |
1724 | if (IS_ENABLED(CONFIG_THERMAL_WRITABLE_TRIPS) && |
1725 | mask & (1 << indx)) { | |
c56f5c03 D |
1726 | tz->trip_temp_attrs[indx].attr.attr.mode |= S_IWUSR; |
1727 | tz->trip_temp_attrs[indx].attr.store = | |
1728 | trip_point_temp_store; | |
1729 | } | |
1730 | ||
1731 | device_create_file(&tz->device, | |
1732 | &tz->trip_temp_attrs[indx].attr); | |
27365a6c D |
1733 | |
1734 | /* create Optional trip hyst attribute */ | |
1735 | if (!tz->ops->get_trip_hyst) | |
1736 | continue; | |
1737 | snprintf(tz->trip_hyst_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1738 | "trip_point_%d_hyst", indx); | |
1739 | ||
1740 | sysfs_attr_init(&tz->trip_hyst_attrs[indx].attr.attr); | |
1741 | tz->trip_hyst_attrs[indx].attr.attr.name = | |
1742 | tz->trip_hyst_attrs[indx].name; | |
1743 | tz->trip_hyst_attrs[indx].attr.attr.mode = S_IRUGO; | |
1744 | tz->trip_hyst_attrs[indx].attr.show = trip_point_hyst_show; | |
1745 | if (tz->ops->set_trip_hyst) { | |
1746 | tz->trip_hyst_attrs[indx].attr.attr.mode |= S_IWUSR; | |
1747 | tz->trip_hyst_attrs[indx].attr.store = | |
1748 | trip_point_hyst_store; | |
1749 | } | |
1750 | ||
1751 | device_create_file(&tz->device, | |
1752 | &tz->trip_hyst_attrs[indx].attr); | |
c56f5c03 D |
1753 | } |
1754 | return 0; | |
1755 | } | |
1756 | ||
1757 | static void remove_trip_attrs(struct thermal_zone_device *tz) | |
1758 | { | |
1759 | int indx; | |
1760 | ||
1761 | for (indx = 0; indx < tz->trips; indx++) { | |
1762 | device_remove_file(&tz->device, | |
1763 | &tz->trip_type_attrs[indx].attr); | |
1764 | device_remove_file(&tz->device, | |
1765 | &tz->trip_temp_attrs[indx].attr); | |
27365a6c D |
1766 | if (tz->ops->get_trip_hyst) |
1767 | device_remove_file(&tz->device, | |
1768 | &tz->trip_hyst_attrs[indx].attr); | |
c56f5c03 D |
1769 | } |
1770 | kfree(tz->trip_type_attrs); | |
1771 | kfree(tz->trip_temp_attrs); | |
27365a6c | 1772 | kfree(tz->trip_hyst_attrs); |
c56f5c03 D |
1773 | } |
1774 | ||
203d3d4a | 1775 | /** |
a00e55f9 | 1776 | * thermal_zone_device_register() - register a new thermal zone device |
203d3d4a ZR |
1777 | * @type: the thermal zone device type |
1778 | * @trips: the number of trip points the thermal zone support | |
c56f5c03 | 1779 | * @mask: a bit string indicating the writeablility of trip points |
203d3d4a ZR |
1780 | * @devdata: private device data |
1781 | * @ops: standard thermal zone device callbacks | |
50125a9b | 1782 | * @tzp: thermal zone platform parameters |
b1569e99 MG |
1783 | * @passive_delay: number of milliseconds to wait between polls when |
1784 | * performing passive cooling | |
1785 | * @polling_delay: number of milliseconds to wait between polls when checking | |
1786 | * whether trip points have been crossed (0 for interrupt | |
1787 | * driven systems) | |
203d3d4a | 1788 | * |
a00e55f9 EV |
1789 | * This interface function adds a new thermal zone device (sensor) to |
1790 | * /sys/class/thermal folder as thermal_zone[0-*]. It tries to bind all the | |
1791 | * thermal cooling devices registered at the same time. | |
203d3d4a | 1792 | * thermal_zone_device_unregister() must be called when the device is no |
1b7ddb84 | 1793 | * longer needed. The passive cooling depends on the .get_trend() return value. |
a00e55f9 EV |
1794 | * |
1795 | * Return: a pointer to the created struct thermal_zone_device or an | |
1796 | * in case of error, an ERR_PTR. Caller must check return value with | |
1797 | * IS_ERR*() helpers. | |
203d3d4a | 1798 | */ |
4b1bf587 | 1799 | struct thermal_zone_device *thermal_zone_device_register(const char *type, |
c56f5c03 | 1800 | int trips, int mask, void *devdata, |
4e5e4705 | 1801 | struct thermal_zone_device_ops *ops, |
6b775e87 | 1802 | struct thermal_zone_params *tzp, |
1b7ddb84 | 1803 | int passive_delay, int polling_delay) |
203d3d4a ZR |
1804 | { |
1805 | struct thermal_zone_device *tz; | |
03a971a2 | 1806 | enum thermal_trip_type trip_type; |
81ad4276 | 1807 | int trip_temp; |
203d3d4a ZR |
1808 | int result; |
1809 | int count; | |
03a971a2 | 1810 | int passive = 0; |
e33df1d2 | 1811 | struct thermal_governor *governor; |
203d3d4a | 1812 | |
204dd1d3 | 1813 | if (type && strlen(type) >= THERMAL_NAME_LENGTH) |
3e6fda5c | 1814 | return ERR_PTR(-EINVAL); |
203d3d4a | 1815 | |
c56f5c03 | 1816 | if (trips > THERMAL_MAX_TRIPS || trips < 0 || mask >> trips) |
3e6fda5c | 1817 | return ERR_PTR(-EINVAL); |
203d3d4a | 1818 | |
81bd4e1c | 1819 | if (!ops) |
3e6fda5c | 1820 | return ERR_PTR(-EINVAL); |
203d3d4a | 1821 | |
83720d0b | 1822 | if (trips > 0 && (!ops->get_trip_type || !ops->get_trip_temp)) |
6b2aa51d EV |
1823 | return ERR_PTR(-EINVAL); |
1824 | ||
203d3d4a ZR |
1825 | tz = kzalloc(sizeof(struct thermal_zone_device), GFP_KERNEL); |
1826 | if (!tz) | |
3e6fda5c | 1827 | return ERR_PTR(-ENOMEM); |
203d3d4a | 1828 | |
2d374139 | 1829 | INIT_LIST_HEAD(&tz->thermal_instances); |
203d3d4a ZR |
1830 | idr_init(&tz->idr); |
1831 | mutex_init(&tz->lock); | |
1832 | result = get_idr(&thermal_tz_idr, &thermal_idr_lock, &tz->id); | |
1833 | if (result) { | |
1834 | kfree(tz); | |
3e6fda5c | 1835 | return ERR_PTR(result); |
203d3d4a ZR |
1836 | } |
1837 | ||
c7a8b9d9 | 1838 | strlcpy(tz->type, type ? : "", sizeof(tz->type)); |
203d3d4a | 1839 | tz->ops = ops; |
50125a9b | 1840 | tz->tzp = tzp; |
203d3d4a ZR |
1841 | tz->device.class = &thermal_class; |
1842 | tz->devdata = devdata; | |
1843 | tz->trips = trips; | |
b1569e99 MG |
1844 | tz->passive_delay = passive_delay; |
1845 | tz->polling_delay = polling_delay; | |
4511f716 CY |
1846 | /* A new thermal zone needs to be updated anyway. */ |
1847 | atomic_set(&tz->need_update, 1); | |
b1569e99 | 1848 | |
354655ea | 1849 | dev_set_name(&tz->device, "thermal_zone%d", tz->id); |
203d3d4a ZR |
1850 | result = device_register(&tz->device); |
1851 | if (result) { | |
1852 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); | |
1853 | kfree(tz); | |
3e6fda5c | 1854 | return ERR_PTR(result); |
203d3d4a ZR |
1855 | } |
1856 | ||
1857 | /* sys I/F */ | |
1858 | if (type) { | |
1859 | result = device_create_file(&tz->device, &dev_attr_type); | |
1860 | if (result) | |
1861 | goto unregister; | |
1862 | } | |
1863 | ||
1864 | result = device_create_file(&tz->device, &dev_attr_temp); | |
1865 | if (result) | |
1866 | goto unregister; | |
1867 | ||
1868 | if (ops->get_mode) { | |
1869 | result = device_create_file(&tz->device, &dev_attr_mode); | |
1870 | if (result) | |
1871 | goto unregister; | |
1872 | } | |
1873 | ||
c56f5c03 D |
1874 | result = create_trip_attrs(tz, mask); |
1875 | if (result) | |
1876 | goto unregister; | |
1877 | ||
203d3d4a | 1878 | for (count = 0; count < trips; count++) { |
81ad4276 ZR |
1879 | if (tz->ops->get_trip_type(tz, count, &trip_type)) |
1880 | set_bit(count, &tz->trips_disabled); | |
03a971a2 MG |
1881 | if (trip_type == THERMAL_TRIP_PASSIVE) |
1882 | passive = 1; | |
81ad4276 ZR |
1883 | if (tz->ops->get_trip_temp(tz, count, &trip_temp)) |
1884 | set_bit(count, &tz->trips_disabled); | |
1885 | /* Check for bogus trip points */ | |
1886 | if (trip_temp == 0) | |
1887 | set_bit(count, &tz->trips_disabled); | |
203d3d4a ZR |
1888 | } |
1889 | ||
5a2c090b D |
1890 | if (!passive) { |
1891 | result = device_create_file(&tz->device, &dev_attr_passive); | |
1892 | if (result) | |
1893 | goto unregister; | |
1894 | } | |
03a971a2 | 1895 | |
79e5421c SH |
1896 | if (IS_ENABLED(CONFIG_THERMAL_EMULATION)) { |
1897 | result = device_create_file(&tz->device, &dev_attr_emul_temp); | |
1898 | if (result) | |
1899 | goto unregister; | |
1900 | } | |
1901 | ||
5a2c090b D |
1902 | /* Create policy attribute */ |
1903 | result = device_create_file(&tz->device, &dev_attr_policy); | |
03a971a2 MG |
1904 | if (result) |
1905 | goto unregister; | |
1906 | ||
9f38271c JM |
1907 | /* Add thermal zone params */ |
1908 | result = create_tzp_attrs(&tz->device); | |
1909 | if (result) | |
1910 | goto unregister; | |
1911 | ||
25a0a5ce NW |
1912 | /* Create available_policies attribute */ |
1913 | result = device_create_file(&tz->device, &dev_attr_available_policies); | |
1914 | if (result) | |
1915 | goto unregister; | |
1916 | ||
a4a15485 D |
1917 | /* Update 'this' zone's governor information */ |
1918 | mutex_lock(&thermal_governor_lock); | |
1919 | ||
1920 | if (tz->tzp) | |
e33df1d2 | 1921 | governor = __find_governor(tz->tzp->governor_name); |
a4a15485 | 1922 | else |
e33df1d2 JM |
1923 | governor = def_governor; |
1924 | ||
1925 | result = thermal_set_governor(tz, governor); | |
1926 | if (result) { | |
1927 | mutex_unlock(&thermal_governor_lock); | |
1928 | goto unregister; | |
1929 | } | |
a4a15485 D |
1930 | |
1931 | mutex_unlock(&thermal_governor_lock); | |
1932 | ||
ccba4ffd EV |
1933 | if (!tz->tzp || !tz->tzp->no_hwmon) { |
1934 | result = thermal_add_hwmon_sysfs(tz); | |
1935 | if (result) | |
1936 | goto unregister; | |
1937 | } | |
e68b16ab | 1938 | |
203d3d4a ZR |
1939 | mutex_lock(&thermal_list_lock); |
1940 | list_add_tail(&tz->node, &thermal_tz_list); | |
203d3d4a ZR |
1941 | mutex_unlock(&thermal_list_lock); |
1942 | ||
7e8ee1e9 D |
1943 | /* Bind cooling devices for this zone */ |
1944 | bind_tz(tz); | |
1945 | ||
b1569e99 MG |
1946 | INIT_DELAYED_WORK(&(tz->poll_queue), thermal_zone_device_check); |
1947 | ||
bb431ba2 | 1948 | thermal_zone_device_reset(tz); |
4511f716 CY |
1949 | /* Update the new thermal zone and mark it as already updated. */ |
1950 | if (atomic_cmpxchg(&tz->need_update, 1, 0)) | |
1951 | thermal_zone_device_update(tz); | |
b1569e99 | 1952 | |
14015860 | 1953 | return tz; |
203d3d4a | 1954 | |
caca8b80 | 1955 | unregister: |
203d3d4a ZR |
1956 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1957 | device_unregister(&tz->device); | |
3e6fda5c | 1958 | return ERR_PTR(result); |
203d3d4a | 1959 | } |
910cb1e3 | 1960 | EXPORT_SYMBOL_GPL(thermal_zone_device_register); |
203d3d4a ZR |
1961 | |
1962 | /** | |
1963 | * thermal_device_unregister - removes the registered thermal zone device | |
203d3d4a ZR |
1964 | * @tz: the thermal zone device to remove |
1965 | */ | |
1966 | void thermal_zone_device_unregister(struct thermal_zone_device *tz) | |
1967 | { | |
7e8ee1e9 D |
1968 | int i; |
1969 | const struct thermal_zone_params *tzp; | |
203d3d4a ZR |
1970 | struct thermal_cooling_device *cdev; |
1971 | struct thermal_zone_device *pos = NULL; | |
203d3d4a ZR |
1972 | |
1973 | if (!tz) | |
1974 | return; | |
1975 | ||
7e8ee1e9 D |
1976 | tzp = tz->tzp; |
1977 | ||
203d3d4a ZR |
1978 | mutex_lock(&thermal_list_lock); |
1979 | list_for_each_entry(pos, &thermal_tz_list, node) | |
1980 | if (pos == tz) | |
1981 | break; | |
1982 | if (pos != tz) { | |
1983 | /* thermal zone device not found */ | |
1984 | mutex_unlock(&thermal_list_lock); | |
1985 | return; | |
1986 | } | |
1987 | list_del(&tz->node); | |
7e8ee1e9 D |
1988 | |
1989 | /* Unbind all cdevs associated with 'this' thermal zone */ | |
1990 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
1991 | if (tz->ops->unbind) { | |
1992 | tz->ops->unbind(tz, cdev); | |
1993 | continue; | |
1994 | } | |
1995 | ||
1996 | if (!tzp || !tzp->tbp) | |
1997 | break; | |
1998 | ||
1999 | for (i = 0; i < tzp->num_tbps; i++) { | |
2000 | if (tzp->tbp[i].cdev == cdev) { | |
2001 | __unbind(tz, tzp->tbp[i].trip_mask, cdev); | |
2002 | tzp->tbp[i].cdev = NULL; | |
2003 | } | |
2004 | } | |
2005 | } | |
2006 | ||
203d3d4a ZR |
2007 | mutex_unlock(&thermal_list_lock); |
2008 | ||
b1569e99 MG |
2009 | thermal_zone_device_set_polling(tz, 0); |
2010 | ||
203d3d4a ZR |
2011 | if (tz->type[0]) |
2012 | device_remove_file(&tz->device, &dev_attr_type); | |
2013 | device_remove_file(&tz->device, &dev_attr_temp); | |
2014 | if (tz->ops->get_mode) | |
2015 | device_remove_file(&tz->device, &dev_attr_mode); | |
5a2c090b | 2016 | device_remove_file(&tz->device, &dev_attr_policy); |
25a0a5ce | 2017 | device_remove_file(&tz->device, &dev_attr_available_policies); |
c56f5c03 | 2018 | remove_trip_attrs(tz); |
e33df1d2 | 2019 | thermal_set_governor(tz, NULL); |
203d3d4a | 2020 | |
e68b16ab | 2021 | thermal_remove_hwmon_sysfs(tz); |
203d3d4a ZR |
2022 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
2023 | idr_destroy(&tz->idr); | |
2024 | mutex_destroy(&tz->lock); | |
2025 | device_unregister(&tz->device); | |
2026 | return; | |
2027 | } | |
910cb1e3 | 2028 | EXPORT_SYMBOL_GPL(thermal_zone_device_unregister); |
203d3d4a | 2029 | |
63c4d919 EV |
2030 | /** |
2031 | * thermal_zone_get_zone_by_name() - search for a zone and returns its ref | |
2032 | * @name: thermal zone name to fetch the temperature | |
2033 | * | |
2034 | * When only one zone is found with the passed name, returns a reference to it. | |
2035 | * | |
2036 | * Return: On success returns a reference to an unique thermal zone with | |
2037 | * matching name equals to @name, an ERR_PTR otherwise (-EINVAL for invalid | |
2038 | * paramenters, -ENODEV for not found and -EEXIST for multiple matches). | |
2039 | */ | |
2040 | struct thermal_zone_device *thermal_zone_get_zone_by_name(const char *name) | |
2041 | { | |
2042 | struct thermal_zone_device *pos = NULL, *ref = ERR_PTR(-EINVAL); | |
2043 | unsigned int found = 0; | |
2044 | ||
2045 | if (!name) | |
2046 | goto exit; | |
2047 | ||
2048 | mutex_lock(&thermal_list_lock); | |
2049 | list_for_each_entry(pos, &thermal_tz_list, node) | |
484ac2f3 | 2050 | if (!strncasecmp(name, pos->type, THERMAL_NAME_LENGTH)) { |
63c4d919 EV |
2051 | found++; |
2052 | ref = pos; | |
2053 | } | |
2054 | mutex_unlock(&thermal_list_lock); | |
2055 | ||
2056 | /* nothing has been found, thus an error code for it */ | |
2057 | if (found == 0) | |
2058 | ref = ERR_PTR(-ENODEV); | |
2059 | else if (found > 1) | |
2060 | /* Success only when an unique zone is found */ | |
2061 | ref = ERR_PTR(-EEXIST); | |
2062 | ||
2063 | exit: | |
2064 | return ref; | |
2065 | } | |
2066 | EXPORT_SYMBOL_GPL(thermal_zone_get_zone_by_name); | |
2067 | ||
af06216a | 2068 | #ifdef CONFIG_NET |
2a94fe48 JB |
2069 | static const struct genl_multicast_group thermal_event_mcgrps[] = { |
2070 | { .name = THERMAL_GENL_MCAST_GROUP_NAME, }, | |
2071 | }; | |
2072 | ||
af06216a RW |
2073 | static struct genl_family thermal_event_genl_family = { |
2074 | .id = GENL_ID_GENERATE, | |
2075 | .name = THERMAL_GENL_FAMILY_NAME, | |
2076 | .version = THERMAL_GENL_VERSION, | |
2077 | .maxattr = THERMAL_GENL_ATTR_MAX, | |
2a94fe48 JB |
2078 | .mcgrps = thermal_event_mcgrps, |
2079 | .n_mcgrps = ARRAY_SIZE(thermal_event_mcgrps), | |
af06216a RW |
2080 | }; |
2081 | ||
8ab3e6a0 EV |
2082 | int thermal_generate_netlink_event(struct thermal_zone_device *tz, |
2083 | enum events event) | |
4cb18728 D |
2084 | { |
2085 | struct sk_buff *skb; | |
2086 | struct nlattr *attr; | |
2087 | struct thermal_genl_event *thermal_event; | |
2088 | void *msg_header; | |
2089 | int size; | |
2090 | int result; | |
b11de07c | 2091 | static unsigned int thermal_event_seqnum; |
4cb18728 | 2092 | |
8ab3e6a0 EV |
2093 | if (!tz) |
2094 | return -EINVAL; | |
2095 | ||
4cb18728 | 2096 | /* allocate memory */ |
886ee546 JP |
2097 | size = nla_total_size(sizeof(struct thermal_genl_event)) + |
2098 | nla_total_size(0); | |
4cb18728 D |
2099 | |
2100 | skb = genlmsg_new(size, GFP_ATOMIC); | |
2101 | if (!skb) | |
2102 | return -ENOMEM; | |
2103 | ||
2104 | /* add the genetlink message header */ | |
2105 | msg_header = genlmsg_put(skb, 0, thermal_event_seqnum++, | |
2106 | &thermal_event_genl_family, 0, | |
2107 | THERMAL_GENL_CMD_EVENT); | |
2108 | if (!msg_header) { | |
2109 | nlmsg_free(skb); | |
2110 | return -ENOMEM; | |
2111 | } | |
2112 | ||
2113 | /* fill the data */ | |
886ee546 JP |
2114 | attr = nla_reserve(skb, THERMAL_GENL_ATTR_EVENT, |
2115 | sizeof(struct thermal_genl_event)); | |
4cb18728 D |
2116 | |
2117 | if (!attr) { | |
2118 | nlmsg_free(skb); | |
2119 | return -EINVAL; | |
2120 | } | |
2121 | ||
2122 | thermal_event = nla_data(attr); | |
2123 | if (!thermal_event) { | |
2124 | nlmsg_free(skb); | |
2125 | return -EINVAL; | |
2126 | } | |
2127 | ||
2128 | memset(thermal_event, 0, sizeof(struct thermal_genl_event)); | |
2129 | ||
8ab3e6a0 | 2130 | thermal_event->orig = tz->id; |
4cb18728 D |
2131 | thermal_event->event = event; |
2132 | ||
2133 | /* send multicast genetlink message */ | |
053c095a | 2134 | genlmsg_end(skb, msg_header); |
4cb18728 | 2135 | |
68eb5503 | 2136 | result = genlmsg_multicast(&thermal_event_genl_family, skb, 0, |
2a94fe48 | 2137 | 0, GFP_ATOMIC); |
4cb18728 | 2138 | if (result) |
923e0b1e | 2139 | dev_err(&tz->device, "Failed to send netlink event:%d", result); |
4cb18728 D |
2140 | |
2141 | return result; | |
2142 | } | |
910cb1e3 | 2143 | EXPORT_SYMBOL_GPL(thermal_generate_netlink_event); |
4cb18728 D |
2144 | |
2145 | static int genetlink_init(void) | |
2146 | { | |
2a94fe48 | 2147 | return genl_register_family(&thermal_event_genl_family); |
4cb18728 D |
2148 | } |
2149 | ||
af06216a RW |
2150 | static void genetlink_exit(void) |
2151 | { | |
2152 | genl_unregister_family(&thermal_event_genl_family); | |
2153 | } | |
2154 | #else /* !CONFIG_NET */ | |
2155 | static inline int genetlink_init(void) { return 0; } | |
2156 | static inline void genetlink_exit(void) {} | |
2157 | #endif /* !CONFIG_NET */ | |
2158 | ||
80a26a5c ZR |
2159 | static int __init thermal_register_governors(void) |
2160 | { | |
2161 | int result; | |
2162 | ||
2163 | result = thermal_gov_step_wise_register(); | |
2164 | if (result) | |
2165 | return result; | |
2166 | ||
2167 | result = thermal_gov_fair_share_register(); | |
2168 | if (result) | |
2169 | return result; | |
2170 | ||
e4dbf98f PF |
2171 | result = thermal_gov_bang_bang_register(); |
2172 | if (result) | |
2173 | return result; | |
2174 | ||
6b775e87 JM |
2175 | result = thermal_gov_user_space_register(); |
2176 | if (result) | |
2177 | return result; | |
2178 | ||
2179 | return thermal_gov_power_allocator_register(); | |
80a26a5c ZR |
2180 | } |
2181 | ||
2182 | static void thermal_unregister_governors(void) | |
2183 | { | |
2184 | thermal_gov_step_wise_unregister(); | |
2185 | thermal_gov_fair_share_unregister(); | |
e4dbf98f | 2186 | thermal_gov_bang_bang_unregister(); |
80a26a5c | 2187 | thermal_gov_user_space_unregister(); |
6b775e87 | 2188 | thermal_gov_power_allocator_unregister(); |
80a26a5c ZR |
2189 | } |
2190 | ||
ff140fea ZR |
2191 | static int thermal_pm_notify(struct notifier_block *nb, |
2192 | unsigned long mode, void *_unused) | |
2193 | { | |
2194 | struct thermal_zone_device *tz; | |
2195 | ||
2196 | switch (mode) { | |
2197 | case PM_HIBERNATION_PREPARE: | |
2198 | case PM_RESTORE_PREPARE: | |
2199 | case PM_SUSPEND_PREPARE: | |
2200 | atomic_set(&in_suspend, 1); | |
2201 | break; | |
2202 | case PM_POST_HIBERNATION: | |
2203 | case PM_POST_RESTORE: | |
2204 | case PM_POST_SUSPEND: | |
2205 | atomic_set(&in_suspend, 0); | |
2206 | list_for_each_entry(tz, &thermal_tz_list, node) { | |
2207 | thermal_zone_device_reset(tz); | |
2208 | thermal_zone_device_update(tz); | |
2209 | } | |
2210 | break; | |
2211 | default: | |
2212 | break; | |
2213 | } | |
2214 | return 0; | |
2215 | } | |
2216 | ||
2217 | static struct notifier_block thermal_pm_nb = { | |
2218 | .notifier_call = thermal_pm_notify, | |
2219 | }; | |
2220 | ||
203d3d4a ZR |
2221 | static int __init thermal_init(void) |
2222 | { | |
80a26a5c ZR |
2223 | int result; |
2224 | ||
2225 | result = thermal_register_governors(); | |
2226 | if (result) | |
2227 | goto error; | |
203d3d4a ZR |
2228 | |
2229 | result = class_register(&thermal_class); | |
80a26a5c ZR |
2230 | if (result) |
2231 | goto unregister_governors; | |
2232 | ||
4cb18728 | 2233 | result = genetlink_init(); |
80a26a5c ZR |
2234 | if (result) |
2235 | goto unregister_class; | |
2236 | ||
4e5e4705 EV |
2237 | result = of_parse_thermal_zones(); |
2238 | if (result) | |
2239 | goto exit_netlink; | |
2240 | ||
ff140fea ZR |
2241 | result = register_pm_notifier(&thermal_pm_nb); |
2242 | if (result) | |
2243 | pr_warn("Thermal: Can not register suspend notifier, return %d\n", | |
2244 | result); | |
2245 | ||
80a26a5c ZR |
2246 | return 0; |
2247 | ||
4e5e4705 EV |
2248 | exit_netlink: |
2249 | genetlink_exit(); | |
80a26a5c ZR |
2250 | unregister_class: |
2251 | class_unregister(&thermal_class); | |
9d367e5e LH |
2252 | unregister_governors: |
2253 | thermal_unregister_governors(); | |
80a26a5c ZR |
2254 | error: |
2255 | idr_destroy(&thermal_tz_idr); | |
2256 | idr_destroy(&thermal_cdev_idr); | |
2257 | mutex_destroy(&thermal_idr_lock); | |
2258 | mutex_destroy(&thermal_list_lock); | |
2259 | mutex_destroy(&thermal_governor_lock); | |
203d3d4a ZR |
2260 | return result; |
2261 | } | |
2262 | ||
2263 | static void __exit thermal_exit(void) | |
2264 | { | |
ff140fea | 2265 | unregister_pm_notifier(&thermal_pm_nb); |
4e5e4705 | 2266 | of_thermal_destroy_zones(); |
80a26a5c | 2267 | genetlink_exit(); |
203d3d4a | 2268 | class_unregister(&thermal_class); |
80a26a5c | 2269 | thermal_unregister_governors(); |
203d3d4a ZR |
2270 | idr_destroy(&thermal_tz_idr); |
2271 | idr_destroy(&thermal_cdev_idr); | |
2272 | mutex_destroy(&thermal_idr_lock); | |
2273 | mutex_destroy(&thermal_list_lock); | |
80a26a5c | 2274 | mutex_destroy(&thermal_governor_lock); |
203d3d4a ZR |
2275 | } |
2276 | ||
4cb18728 | 2277 | fs_initcall(thermal_init); |
203d3d4a | 2278 | module_exit(thermal_exit); |