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