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> | |
203d3d4a | 40 | |
100a8fdb PA |
41 | #define CREATE_TRACE_POINTS |
42 | #include <trace/events/thermal.h> | |
43 | ||
71350db4 | 44 | #include "thermal_core.h" |
0dd88793 | 45 | #include "thermal_hwmon.h" |
71350db4 | 46 | |
63c4ec90 | 47 | MODULE_AUTHOR("Zhang Rui"); |
203d3d4a | 48 | MODULE_DESCRIPTION("Generic thermal management sysfs support"); |
6d8d4974 | 49 | MODULE_LICENSE("GPL v2"); |
203d3d4a | 50 | |
203d3d4a ZR |
51 | static DEFINE_IDR(thermal_tz_idr); |
52 | static DEFINE_IDR(thermal_cdev_idr); | |
53 | static DEFINE_MUTEX(thermal_idr_lock); | |
54 | ||
55 | static LIST_HEAD(thermal_tz_list); | |
56 | static LIST_HEAD(thermal_cdev_list); | |
a4a15485 D |
57 | static LIST_HEAD(thermal_governor_list); |
58 | ||
203d3d4a | 59 | static DEFINE_MUTEX(thermal_list_lock); |
a4a15485 D |
60 | static DEFINE_MUTEX(thermal_governor_lock); |
61 | ||
f2234bcd ZR |
62 | static struct thermal_governor *def_governor; |
63 | ||
a4a15485 D |
64 | static struct thermal_governor *__find_governor(const char *name) |
65 | { | |
66 | struct thermal_governor *pos; | |
67 | ||
f2234bcd ZR |
68 | if (!name || !name[0]) |
69 | return def_governor; | |
70 | ||
a4a15485 | 71 | list_for_each_entry(pos, &thermal_governor_list, governor_list) |
484ac2f3 | 72 | if (!strncasecmp(name, pos->name, THERMAL_NAME_LENGTH)) |
a4a15485 D |
73 | return pos; |
74 | ||
75 | return NULL; | |
76 | } | |
77 | ||
78 | int thermal_register_governor(struct thermal_governor *governor) | |
79 | { | |
80 | int err; | |
81 | const char *name; | |
82 | struct thermal_zone_device *pos; | |
83 | ||
84 | if (!governor) | |
85 | return -EINVAL; | |
86 | ||
87 | mutex_lock(&thermal_governor_lock); | |
88 | ||
89 | err = -EBUSY; | |
90 | if (__find_governor(governor->name) == NULL) { | |
91 | err = 0; | |
92 | list_add(&governor->governor_list, &thermal_governor_list); | |
f2234bcd ZR |
93 | if (!def_governor && !strncmp(governor->name, |
94 | DEFAULT_THERMAL_GOVERNOR, THERMAL_NAME_LENGTH)) | |
95 | def_governor = governor; | |
a4a15485 D |
96 | } |
97 | ||
98 | mutex_lock(&thermal_list_lock); | |
99 | ||
100 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
f2234bcd ZR |
101 | /* |
102 | * only thermal zones with specified tz->tzp->governor_name | |
103 | * may run with tz->govenor unset | |
104 | */ | |
a4a15485 D |
105 | if (pos->governor) |
106 | continue; | |
f2234bcd ZR |
107 | |
108 | name = pos->tzp->governor_name; | |
109 | ||
484ac2f3 | 110 | if (!strncasecmp(name, governor->name, THERMAL_NAME_LENGTH)) |
a4a15485 D |
111 | pos->governor = governor; |
112 | } | |
113 | ||
114 | mutex_unlock(&thermal_list_lock); | |
115 | mutex_unlock(&thermal_governor_lock); | |
116 | ||
117 | return err; | |
118 | } | |
a4a15485 D |
119 | |
120 | void thermal_unregister_governor(struct thermal_governor *governor) | |
121 | { | |
122 | struct thermal_zone_device *pos; | |
123 | ||
124 | if (!governor) | |
125 | return; | |
126 | ||
127 | mutex_lock(&thermal_governor_lock); | |
128 | ||
129 | if (__find_governor(governor->name) == NULL) | |
130 | goto exit; | |
131 | ||
132 | mutex_lock(&thermal_list_lock); | |
133 | ||
134 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
484ac2f3 | 135 | if (!strncasecmp(pos->governor->name, governor->name, |
a4a15485 D |
136 | THERMAL_NAME_LENGTH)) |
137 | pos->governor = NULL; | |
138 | } | |
139 | ||
140 | mutex_unlock(&thermal_list_lock); | |
141 | list_del(&governor->governor_list); | |
142 | exit: | |
143 | mutex_unlock(&thermal_governor_lock); | |
144 | return; | |
145 | } | |
203d3d4a ZR |
146 | |
147 | static int get_idr(struct idr *idr, struct mutex *lock, int *id) | |
148 | { | |
6deb69fa | 149 | int ret; |
203d3d4a ZR |
150 | |
151 | if (lock) | |
152 | mutex_lock(lock); | |
6deb69fa | 153 | ret = idr_alloc(idr, NULL, 0, 0, GFP_KERNEL); |
203d3d4a ZR |
154 | if (lock) |
155 | mutex_unlock(lock); | |
6deb69fa TH |
156 | if (unlikely(ret < 0)) |
157 | return ret; | |
158 | *id = ret; | |
203d3d4a ZR |
159 | return 0; |
160 | } | |
161 | ||
162 | static void release_idr(struct idr *idr, struct mutex *lock, int id) | |
163 | { | |
164 | if (lock) | |
165 | mutex_lock(lock); | |
166 | idr_remove(idr, id); | |
167 | if (lock) | |
168 | mutex_unlock(lock); | |
169 | } | |
170 | ||
9b4298a0 D |
171 | int get_tz_trend(struct thermal_zone_device *tz, int trip) |
172 | { | |
173 | enum thermal_trend trend; | |
174 | ||
0c872507 EV |
175 | if (tz->emul_temperature || !tz->ops->get_trend || |
176 | tz->ops->get_trend(tz, trip, &trend)) { | |
9b4298a0 D |
177 | if (tz->temperature > tz->last_temperature) |
178 | trend = THERMAL_TREND_RAISING; | |
179 | else if (tz->temperature < tz->last_temperature) | |
180 | trend = THERMAL_TREND_DROPPING; | |
181 | else | |
182 | trend = THERMAL_TREND_STABLE; | |
183 | } | |
184 | ||
185 | return trend; | |
186 | } | |
187 | EXPORT_SYMBOL(get_tz_trend); | |
188 | ||
189 | struct thermal_instance *get_thermal_instance(struct thermal_zone_device *tz, | |
190 | struct thermal_cooling_device *cdev, int trip) | |
191 | { | |
192 | struct thermal_instance *pos = NULL; | |
193 | struct thermal_instance *target_instance = NULL; | |
194 | ||
195 | mutex_lock(&tz->lock); | |
196 | mutex_lock(&cdev->lock); | |
197 | ||
198 | list_for_each_entry(pos, &tz->thermal_instances, tz_node) { | |
199 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { | |
200 | target_instance = pos; | |
201 | break; | |
202 | } | |
203 | } | |
204 | ||
205 | mutex_unlock(&cdev->lock); | |
206 | mutex_unlock(&tz->lock); | |
207 | ||
208 | return target_instance; | |
209 | } | |
210 | EXPORT_SYMBOL(get_thermal_instance); | |
211 | ||
7e8ee1e9 D |
212 | static void print_bind_err_msg(struct thermal_zone_device *tz, |
213 | struct thermal_cooling_device *cdev, int ret) | |
214 | { | |
215 | dev_err(&tz->device, "binding zone %s with cdev %s failed:%d\n", | |
216 | tz->type, cdev->type, ret); | |
217 | } | |
218 | ||
219 | static void __bind(struct thermal_zone_device *tz, int mask, | |
a8892d83 EV |
220 | struct thermal_cooling_device *cdev, |
221 | unsigned long *limits) | |
7e8ee1e9 D |
222 | { |
223 | int i, ret; | |
224 | ||
225 | for (i = 0; i < tz->trips; i++) { | |
226 | if (mask & (1 << i)) { | |
a8892d83 EV |
227 | unsigned long upper, lower; |
228 | ||
229 | upper = THERMAL_NO_LIMIT; | |
230 | lower = THERMAL_NO_LIMIT; | |
231 | if (limits) { | |
232 | lower = limits[i * 2]; | |
233 | upper = limits[i * 2 + 1]; | |
234 | } | |
7e8ee1e9 | 235 | ret = thermal_zone_bind_cooling_device(tz, i, cdev, |
a8892d83 | 236 | upper, lower); |
7e8ee1e9 D |
237 | if (ret) |
238 | print_bind_err_msg(tz, cdev, ret); | |
239 | } | |
240 | } | |
241 | } | |
242 | ||
243 | static void __unbind(struct thermal_zone_device *tz, int mask, | |
244 | struct thermal_cooling_device *cdev) | |
245 | { | |
246 | int i; | |
247 | ||
248 | for (i = 0; i < tz->trips; i++) | |
249 | if (mask & (1 << i)) | |
250 | thermal_zone_unbind_cooling_device(tz, i, cdev); | |
251 | } | |
252 | ||
253 | static void bind_cdev(struct thermal_cooling_device *cdev) | |
254 | { | |
255 | int i, ret; | |
256 | const struct thermal_zone_params *tzp; | |
257 | struct thermal_zone_device *pos = NULL; | |
258 | ||
259 | mutex_lock(&thermal_list_lock); | |
260 | ||
261 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
262 | if (!pos->tzp && !pos->ops->bind) | |
263 | continue; | |
264 | ||
a9f2d19b | 265 | if (pos->ops->bind) { |
7e8ee1e9 D |
266 | ret = pos->ops->bind(pos, cdev); |
267 | if (ret) | |
268 | print_bind_err_msg(pos, cdev, ret); | |
a9f2d19b | 269 | continue; |
7e8ee1e9 D |
270 | } |
271 | ||
272 | tzp = pos->tzp; | |
791700cd HD |
273 | if (!tzp || !tzp->tbp) |
274 | continue; | |
7e8ee1e9 D |
275 | |
276 | for (i = 0; i < tzp->num_tbps; i++) { | |
277 | if (tzp->tbp[i].cdev || !tzp->tbp[i].match) | |
278 | continue; | |
279 | if (tzp->tbp[i].match(pos, cdev)) | |
280 | continue; | |
281 | tzp->tbp[i].cdev = cdev; | |
a8892d83 EV |
282 | __bind(pos, tzp->tbp[i].trip_mask, cdev, |
283 | tzp->tbp[i].binding_limits); | |
7e8ee1e9 D |
284 | } |
285 | } | |
286 | ||
287 | mutex_unlock(&thermal_list_lock); | |
288 | } | |
289 | ||
290 | static void bind_tz(struct thermal_zone_device *tz) | |
291 | { | |
292 | int i, ret; | |
293 | struct thermal_cooling_device *pos = NULL; | |
294 | const struct thermal_zone_params *tzp = tz->tzp; | |
295 | ||
296 | if (!tzp && !tz->ops->bind) | |
297 | return; | |
298 | ||
299 | mutex_lock(&thermal_list_lock); | |
300 | ||
a9f2d19b NW |
301 | /* If there is ops->bind, try to use ops->bind */ |
302 | if (tz->ops->bind) { | |
7e8ee1e9 D |
303 | list_for_each_entry(pos, &thermal_cdev_list, node) { |
304 | ret = tz->ops->bind(tz, pos); | |
305 | if (ret) | |
306 | print_bind_err_msg(tz, pos, ret); | |
307 | } | |
308 | goto exit; | |
309 | } | |
310 | ||
791700cd | 311 | if (!tzp || !tzp->tbp) |
7e8ee1e9 D |
312 | goto exit; |
313 | ||
314 | list_for_each_entry(pos, &thermal_cdev_list, node) { | |
315 | for (i = 0; i < tzp->num_tbps; i++) { | |
316 | if (tzp->tbp[i].cdev || !tzp->tbp[i].match) | |
317 | continue; | |
318 | if (tzp->tbp[i].match(tz, pos)) | |
319 | continue; | |
320 | tzp->tbp[i].cdev = pos; | |
a8892d83 EV |
321 | __bind(tz, tzp->tbp[i].trip_mask, pos, |
322 | tzp->tbp[i].binding_limits); | |
7e8ee1e9 D |
323 | } |
324 | } | |
325 | exit: | |
326 | mutex_unlock(&thermal_list_lock); | |
327 | } | |
328 | ||
0c01ebbf D |
329 | static void thermal_zone_device_set_polling(struct thermal_zone_device *tz, |
330 | int delay) | |
331 | { | |
332 | if (delay > 1000) | |
333 | mod_delayed_work(system_freezable_wq, &tz->poll_queue, | |
334 | round_jiffies(msecs_to_jiffies(delay))); | |
335 | else if (delay) | |
336 | mod_delayed_work(system_freezable_wq, &tz->poll_queue, | |
337 | msecs_to_jiffies(delay)); | |
338 | else | |
339 | cancel_delayed_work(&tz->poll_queue); | |
340 | } | |
341 | ||
342 | static void monitor_thermal_zone(struct thermal_zone_device *tz) | |
343 | { | |
344 | mutex_lock(&tz->lock); | |
345 | ||
346 | if (tz->passive) | |
347 | thermal_zone_device_set_polling(tz, tz->passive_delay); | |
348 | else if (tz->polling_delay) | |
349 | thermal_zone_device_set_polling(tz, tz->polling_delay); | |
350 | else | |
351 | thermal_zone_device_set_polling(tz, 0); | |
352 | ||
353 | mutex_unlock(&tz->lock); | |
354 | } | |
355 | ||
356 | static void handle_non_critical_trips(struct thermal_zone_device *tz, | |
357 | int trip, enum thermal_trip_type trip_type) | |
358 | { | |
f2234bcd ZR |
359 | tz->governor ? tz->governor->throttle(tz, trip) : |
360 | def_governor->throttle(tz, trip); | |
0c01ebbf D |
361 | } |
362 | ||
363 | static void handle_critical_trips(struct thermal_zone_device *tz, | |
364 | int trip, enum thermal_trip_type trip_type) | |
365 | { | |
366 | long trip_temp; | |
367 | ||
368 | tz->ops->get_trip_temp(tz, trip, &trip_temp); | |
369 | ||
370 | /* If we have not crossed the trip_temp, we do not care. */ | |
84ffe3ec | 371 | if (trip_temp <= 0 || tz->temperature < trip_temp) |
0c01ebbf D |
372 | return; |
373 | ||
208cd822 PA |
374 | trace_thermal_zone_trip(tz, trip, trip_type); |
375 | ||
0c01ebbf D |
376 | if (tz->ops->notify) |
377 | tz->ops->notify(tz, trip, trip_type); | |
378 | ||
379 | if (trip_type == THERMAL_TRIP_CRITICAL) { | |
923e0b1e EV |
380 | dev_emerg(&tz->device, |
381 | "critical temperature reached(%d C),shutting down\n", | |
382 | tz->temperature / 1000); | |
0c01ebbf D |
383 | orderly_poweroff(true); |
384 | } | |
385 | } | |
386 | ||
387 | static void handle_thermal_trip(struct thermal_zone_device *tz, int trip) | |
388 | { | |
389 | enum thermal_trip_type type; | |
390 | ||
391 | tz->ops->get_trip_type(tz, trip, &type); | |
392 | ||
393 | if (type == THERMAL_TRIP_CRITICAL || type == THERMAL_TRIP_HOT) | |
394 | handle_critical_trips(tz, trip, type); | |
395 | else | |
396 | handle_non_critical_trips(tz, trip, type); | |
397 | /* | |
398 | * Alright, we handled this trip successfully. | |
399 | * So, start monitoring again. | |
400 | */ | |
401 | monitor_thermal_zone(tz); | |
402 | } | |
403 | ||
837b26bb EV |
404 | /** |
405 | * thermal_zone_get_temp() - returns its the temperature of thermal zone | |
406 | * @tz: a valid pointer to a struct thermal_zone_device | |
407 | * @temp: a valid pointer to where to store the resulting temperature. | |
408 | * | |
409 | * When a valid thermal zone reference is passed, it will fetch its | |
410 | * temperature and fill @temp. | |
411 | * | |
412 | * Return: On success returns 0, an error code otherwise | |
413 | */ | |
414 | int thermal_zone_get_temp(struct thermal_zone_device *tz, unsigned long *temp) | |
e6e238c3 | 415 | { |
837b26bb | 416 | int ret = -EINVAL; |
5e20b2e5 ZR |
417 | #ifdef CONFIG_THERMAL_EMULATION |
418 | int count; | |
e6e238c3 ADK |
419 | unsigned long crit_temp = -1UL; |
420 | enum thermal_trip_type type; | |
5e20b2e5 | 421 | #endif |
e6e238c3 | 422 | |
81bd4e1c | 423 | if (!tz || IS_ERR(tz) || !tz->ops->get_temp) |
837b26bb EV |
424 | goto exit; |
425 | ||
e6e238c3 ADK |
426 | mutex_lock(&tz->lock); |
427 | ||
428 | ret = tz->ops->get_temp(tz, temp); | |
429 | #ifdef CONFIG_THERMAL_EMULATION | |
430 | if (!tz->emul_temperature) | |
431 | goto skip_emul; | |
432 | ||
433 | for (count = 0; count < tz->trips; count++) { | |
434 | ret = tz->ops->get_trip_type(tz, count, &type); | |
435 | if (!ret && type == THERMAL_TRIP_CRITICAL) { | |
436 | ret = tz->ops->get_trip_temp(tz, count, &crit_temp); | |
437 | break; | |
438 | } | |
439 | } | |
440 | ||
441 | if (ret) | |
442 | goto skip_emul; | |
443 | ||
444 | if (*temp < crit_temp) | |
445 | *temp = tz->emul_temperature; | |
446 | skip_emul: | |
447 | #endif | |
448 | mutex_unlock(&tz->lock); | |
837b26bb | 449 | exit: |
e6e238c3 ADK |
450 | return ret; |
451 | } | |
837b26bb | 452 | EXPORT_SYMBOL_GPL(thermal_zone_get_temp); |
e6e238c3 | 453 | |
0c01ebbf D |
454 | static void update_temperature(struct thermal_zone_device *tz) |
455 | { | |
456 | long temp; | |
457 | int ret; | |
458 | ||
e6e238c3 | 459 | ret = thermal_zone_get_temp(tz, &temp); |
0c01ebbf | 460 | if (ret) { |
7e497a73 HG |
461 | if (ret != -EAGAIN) |
462 | dev_warn(&tz->device, | |
463 | "failed to read out thermal zone (%d)\n", | |
464 | ret); | |
e6e238c3 | 465 | return; |
0c01ebbf D |
466 | } |
467 | ||
e6e238c3 | 468 | mutex_lock(&tz->lock); |
0c01ebbf D |
469 | tz->last_temperature = tz->temperature; |
470 | tz->temperature = temp; | |
0c01ebbf | 471 | mutex_unlock(&tz->lock); |
06475b55 | 472 | |
100a8fdb | 473 | trace_thermal_temperature(tz); |
06475b55 AL |
474 | dev_dbg(&tz->device, "last_temperature=%d, current_temperature=%d\n", |
475 | tz->last_temperature, tz->temperature); | |
0c01ebbf D |
476 | } |
477 | ||
478 | void thermal_zone_device_update(struct thermal_zone_device *tz) | |
479 | { | |
480 | int count; | |
481 | ||
81bd4e1c EV |
482 | if (!tz->ops->get_temp) |
483 | return; | |
484 | ||
0c01ebbf D |
485 | update_temperature(tz); |
486 | ||
487 | for (count = 0; count < tz->trips; count++) | |
488 | handle_thermal_trip(tz, count); | |
489 | } | |
910cb1e3 | 490 | EXPORT_SYMBOL_GPL(thermal_zone_device_update); |
0c01ebbf D |
491 | |
492 | static void thermal_zone_device_check(struct work_struct *work) | |
493 | { | |
494 | struct thermal_zone_device *tz = container_of(work, struct | |
495 | thermal_zone_device, | |
496 | poll_queue.work); | |
497 | thermal_zone_device_update(tz); | |
498 | } | |
499 | ||
203d3d4a ZR |
500 | /* sys I/F for thermal zone */ |
501 | ||
502 | #define to_thermal_zone(_dev) \ | |
503 | container_of(_dev, struct thermal_zone_device, device) | |
504 | ||
505 | static ssize_t | |
506 | type_show(struct device *dev, struct device_attribute *attr, char *buf) | |
507 | { | |
508 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
509 | ||
510 | return sprintf(buf, "%s\n", tz->type); | |
511 | } | |
512 | ||
513 | static ssize_t | |
514 | temp_show(struct device *dev, struct device_attribute *attr, char *buf) | |
515 | { | |
516 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
517 | long temperature; |
518 | int ret; | |
203d3d4a | 519 | |
e6e238c3 | 520 | ret = thermal_zone_get_temp(tz, &temperature); |
6503e5df MG |
521 | |
522 | if (ret) | |
523 | return ret; | |
524 | ||
525 | return sprintf(buf, "%ld\n", temperature); | |
203d3d4a ZR |
526 | } |
527 | ||
528 | static ssize_t | |
529 | mode_show(struct device *dev, struct device_attribute *attr, char *buf) | |
530 | { | |
531 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
532 | enum thermal_device_mode mode; |
533 | int result; | |
203d3d4a ZR |
534 | |
535 | if (!tz->ops->get_mode) | |
536 | return -EPERM; | |
537 | ||
6503e5df MG |
538 | result = tz->ops->get_mode(tz, &mode); |
539 | if (result) | |
540 | return result; | |
541 | ||
542 | return sprintf(buf, "%s\n", mode == THERMAL_DEVICE_ENABLED ? "enabled" | |
543 | : "disabled"); | |
203d3d4a ZR |
544 | } |
545 | ||
546 | static ssize_t | |
547 | mode_store(struct device *dev, struct device_attribute *attr, | |
548 | const char *buf, size_t count) | |
549 | { | |
550 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
551 | int result; | |
552 | ||
553 | if (!tz->ops->set_mode) | |
554 | return -EPERM; | |
555 | ||
f1f0e2ac | 556 | if (!strncmp(buf, "enabled", sizeof("enabled") - 1)) |
6503e5df | 557 | result = tz->ops->set_mode(tz, THERMAL_DEVICE_ENABLED); |
f1f0e2ac | 558 | else if (!strncmp(buf, "disabled", sizeof("disabled") - 1)) |
6503e5df MG |
559 | result = tz->ops->set_mode(tz, THERMAL_DEVICE_DISABLED); |
560 | else | |
561 | result = -EINVAL; | |
562 | ||
203d3d4a ZR |
563 | if (result) |
564 | return result; | |
565 | ||
566 | return count; | |
567 | } | |
568 | ||
569 | static ssize_t | |
570 | trip_point_type_show(struct device *dev, struct device_attribute *attr, | |
571 | char *buf) | |
572 | { | |
573 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
574 | enum thermal_trip_type type; |
575 | int trip, result; | |
203d3d4a ZR |
576 | |
577 | if (!tz->ops->get_trip_type) | |
578 | return -EPERM; | |
579 | ||
580 | if (!sscanf(attr->attr.name, "trip_point_%d_type", &trip)) | |
581 | return -EINVAL; | |
582 | ||
6503e5df MG |
583 | result = tz->ops->get_trip_type(tz, trip, &type); |
584 | if (result) | |
585 | return result; | |
586 | ||
587 | switch (type) { | |
588 | case THERMAL_TRIP_CRITICAL: | |
625120a4 | 589 | return sprintf(buf, "critical\n"); |
6503e5df | 590 | case THERMAL_TRIP_HOT: |
625120a4 | 591 | return sprintf(buf, "hot\n"); |
6503e5df | 592 | case THERMAL_TRIP_PASSIVE: |
625120a4 | 593 | return sprintf(buf, "passive\n"); |
6503e5df | 594 | case THERMAL_TRIP_ACTIVE: |
625120a4 | 595 | return sprintf(buf, "active\n"); |
6503e5df | 596 | default: |
625120a4 | 597 | return sprintf(buf, "unknown\n"); |
6503e5df | 598 | } |
203d3d4a ZR |
599 | } |
600 | ||
c56f5c03 D |
601 | static ssize_t |
602 | trip_point_temp_store(struct device *dev, struct device_attribute *attr, | |
603 | const char *buf, size_t count) | |
604 | { | |
605 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
606 | int trip, ret; | |
607 | unsigned long temperature; | |
608 | ||
609 | if (!tz->ops->set_trip_temp) | |
610 | return -EPERM; | |
611 | ||
612 | if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip)) | |
613 | return -EINVAL; | |
614 | ||
615 | if (kstrtoul(buf, 10, &temperature)) | |
616 | return -EINVAL; | |
617 | ||
618 | ret = tz->ops->set_trip_temp(tz, trip, temperature); | |
619 | ||
620 | return ret ? ret : count; | |
621 | } | |
622 | ||
203d3d4a ZR |
623 | static ssize_t |
624 | trip_point_temp_show(struct device *dev, struct device_attribute *attr, | |
625 | char *buf) | |
626 | { | |
627 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
628 | int trip, ret; |
629 | long temperature; | |
203d3d4a ZR |
630 | |
631 | if (!tz->ops->get_trip_temp) | |
632 | return -EPERM; | |
633 | ||
634 | if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip)) | |
635 | return -EINVAL; | |
636 | ||
6503e5df MG |
637 | ret = tz->ops->get_trip_temp(tz, trip, &temperature); |
638 | ||
639 | if (ret) | |
640 | return ret; | |
641 | ||
642 | return sprintf(buf, "%ld\n", temperature); | |
203d3d4a ZR |
643 | } |
644 | ||
27365a6c D |
645 | static ssize_t |
646 | trip_point_hyst_store(struct device *dev, struct device_attribute *attr, | |
647 | const char *buf, size_t count) | |
648 | { | |
649 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
650 | int trip, ret; | |
651 | unsigned long temperature; | |
652 | ||
653 | if (!tz->ops->set_trip_hyst) | |
654 | return -EPERM; | |
655 | ||
656 | if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip)) | |
657 | return -EINVAL; | |
658 | ||
659 | if (kstrtoul(buf, 10, &temperature)) | |
660 | return -EINVAL; | |
661 | ||
662 | /* | |
663 | * We are not doing any check on the 'temperature' value | |
664 | * here. The driver implementing 'set_trip_hyst' has to | |
665 | * take care of this. | |
666 | */ | |
667 | ret = tz->ops->set_trip_hyst(tz, trip, temperature); | |
668 | ||
669 | return ret ? ret : count; | |
670 | } | |
671 | ||
672 | static ssize_t | |
673 | trip_point_hyst_show(struct device *dev, struct device_attribute *attr, | |
674 | char *buf) | |
675 | { | |
676 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
677 | int trip, ret; | |
678 | unsigned long temperature; | |
679 | ||
680 | if (!tz->ops->get_trip_hyst) | |
681 | return -EPERM; | |
682 | ||
683 | if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip)) | |
684 | return -EINVAL; | |
685 | ||
686 | ret = tz->ops->get_trip_hyst(tz, trip, &temperature); | |
687 | ||
688 | return ret ? ret : sprintf(buf, "%ld\n", temperature); | |
689 | } | |
690 | ||
03a971a2 MG |
691 | static ssize_t |
692 | passive_store(struct device *dev, struct device_attribute *attr, | |
693 | const char *buf, size_t count) | |
694 | { | |
695 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
696 | struct thermal_cooling_device *cdev = NULL; | |
697 | int state; | |
698 | ||
699 | if (!sscanf(buf, "%d\n", &state)) | |
700 | return -EINVAL; | |
701 | ||
3d8e3ad8 FP |
702 | /* sanity check: values below 1000 millicelcius don't make sense |
703 | * and can cause the system to go into a thermal heart attack | |
704 | */ | |
705 | if (state && state < 1000) | |
706 | return -EINVAL; | |
707 | ||
03a971a2 MG |
708 | if (state && !tz->forced_passive) { |
709 | mutex_lock(&thermal_list_lock); | |
710 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
711 | if (!strncmp("Processor", cdev->type, | |
712 | sizeof("Processor"))) | |
713 | thermal_zone_bind_cooling_device(tz, | |
9d99842f ZR |
714 | THERMAL_TRIPS_NONE, cdev, |
715 | THERMAL_NO_LIMIT, | |
716 | THERMAL_NO_LIMIT); | |
03a971a2 MG |
717 | } |
718 | mutex_unlock(&thermal_list_lock); | |
e4143b03 FP |
719 | if (!tz->passive_delay) |
720 | tz->passive_delay = 1000; | |
03a971a2 MG |
721 | } else if (!state && tz->forced_passive) { |
722 | mutex_lock(&thermal_list_lock); | |
723 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
724 | if (!strncmp("Processor", cdev->type, | |
725 | sizeof("Processor"))) | |
726 | thermal_zone_unbind_cooling_device(tz, | |
727 | THERMAL_TRIPS_NONE, | |
728 | cdev); | |
729 | } | |
730 | mutex_unlock(&thermal_list_lock); | |
e4143b03 | 731 | tz->passive_delay = 0; |
03a971a2 MG |
732 | } |
733 | ||
03a971a2 MG |
734 | tz->forced_passive = state; |
735 | ||
736 | thermal_zone_device_update(tz); | |
737 | ||
738 | return count; | |
739 | } | |
740 | ||
741 | static ssize_t | |
742 | passive_show(struct device *dev, struct device_attribute *attr, | |
743 | char *buf) | |
744 | { | |
745 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
746 | ||
747 | return sprintf(buf, "%d\n", tz->forced_passive); | |
748 | } | |
749 | ||
5a2c090b D |
750 | static ssize_t |
751 | policy_store(struct device *dev, struct device_attribute *attr, | |
752 | const char *buf, size_t count) | |
753 | { | |
754 | int ret = -EINVAL; | |
755 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
756 | struct thermal_governor *gov; | |
42a5bf50 AS |
757 | char name[THERMAL_NAME_LENGTH]; |
758 | ||
759 | snprintf(name, sizeof(name), "%s", buf); | |
5a2c090b D |
760 | |
761 | mutex_lock(&thermal_governor_lock); | |
b6cc772f | 762 | mutex_lock(&tz->lock); |
5a2c090b | 763 | |
42a5bf50 | 764 | gov = __find_governor(strim(name)); |
5a2c090b D |
765 | if (!gov) |
766 | goto exit; | |
767 | ||
768 | tz->governor = gov; | |
769 | ret = count; | |
770 | ||
771 | exit: | |
b6cc772f | 772 | mutex_unlock(&tz->lock); |
5a2c090b D |
773 | mutex_unlock(&thermal_governor_lock); |
774 | return ret; | |
775 | } | |
776 | ||
777 | static ssize_t | |
778 | policy_show(struct device *dev, struct device_attribute *devattr, char *buf) | |
779 | { | |
780 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
781 | ||
782 | return sprintf(buf, "%s\n", tz->governor->name); | |
783 | } | |
784 | ||
e6e238c3 ADK |
785 | #ifdef CONFIG_THERMAL_EMULATION |
786 | static ssize_t | |
787 | emul_temp_store(struct device *dev, struct device_attribute *attr, | |
788 | const char *buf, size_t count) | |
789 | { | |
790 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
791 | int ret = 0; | |
792 | unsigned long temperature; | |
793 | ||
794 | if (kstrtoul(buf, 10, &temperature)) | |
795 | return -EINVAL; | |
796 | ||
797 | if (!tz->ops->set_emul_temp) { | |
798 | mutex_lock(&tz->lock); | |
799 | tz->emul_temperature = temperature; | |
800 | mutex_unlock(&tz->lock); | |
801 | } else { | |
802 | ret = tz->ops->set_emul_temp(tz, temperature); | |
803 | } | |
804 | ||
800744bf T |
805 | if (!ret) |
806 | thermal_zone_device_update(tz); | |
807 | ||
e6e238c3 ADK |
808 | return ret ? ret : count; |
809 | } | |
810 | static DEVICE_ATTR(emul_temp, S_IWUSR, NULL, emul_temp_store); | |
811 | #endif/*CONFIG_THERMAL_EMULATION*/ | |
812 | ||
203d3d4a ZR |
813 | static DEVICE_ATTR(type, 0444, type_show, NULL); |
814 | static DEVICE_ATTR(temp, 0444, temp_show, NULL); | |
815 | static DEVICE_ATTR(mode, 0644, mode_show, mode_store); | |
886ee546 | 816 | static DEVICE_ATTR(passive, S_IRUGO | S_IWUSR, passive_show, passive_store); |
5a2c090b | 817 | static DEVICE_ATTR(policy, S_IRUGO | S_IWUSR, policy_show, policy_store); |
203d3d4a | 818 | |
203d3d4a ZR |
819 | /* sys I/F for cooling device */ |
820 | #define to_cooling_device(_dev) \ | |
821 | container_of(_dev, struct thermal_cooling_device, device) | |
822 | ||
823 | static ssize_t | |
824 | thermal_cooling_device_type_show(struct device *dev, | |
825 | struct device_attribute *attr, char *buf) | |
826 | { | |
827 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
828 | ||
829 | return sprintf(buf, "%s\n", cdev->type); | |
830 | } | |
831 | ||
832 | static ssize_t | |
833 | thermal_cooling_device_max_state_show(struct device *dev, | |
834 | struct device_attribute *attr, char *buf) | |
835 | { | |
836 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df MG |
837 | unsigned long state; |
838 | int ret; | |
203d3d4a | 839 | |
6503e5df MG |
840 | ret = cdev->ops->get_max_state(cdev, &state); |
841 | if (ret) | |
842 | return ret; | |
843 | return sprintf(buf, "%ld\n", state); | |
203d3d4a ZR |
844 | } |
845 | ||
846 | static ssize_t | |
847 | thermal_cooling_device_cur_state_show(struct device *dev, | |
848 | struct device_attribute *attr, char *buf) | |
849 | { | |
850 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df MG |
851 | unsigned long state; |
852 | int ret; | |
203d3d4a | 853 | |
6503e5df MG |
854 | ret = cdev->ops->get_cur_state(cdev, &state); |
855 | if (ret) | |
856 | return ret; | |
857 | return sprintf(buf, "%ld\n", state); | |
203d3d4a ZR |
858 | } |
859 | ||
860 | static ssize_t | |
861 | thermal_cooling_device_cur_state_store(struct device *dev, | |
862 | struct device_attribute *attr, | |
863 | const char *buf, size_t count) | |
864 | { | |
865 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df | 866 | unsigned long state; |
203d3d4a ZR |
867 | int result; |
868 | ||
6503e5df | 869 | if (!sscanf(buf, "%ld\n", &state)) |
203d3d4a ZR |
870 | return -EINVAL; |
871 | ||
edb94918 | 872 | if ((long)state < 0) |
203d3d4a ZR |
873 | return -EINVAL; |
874 | ||
875 | result = cdev->ops->set_cur_state(cdev, state); | |
876 | if (result) | |
877 | return result; | |
878 | return count; | |
879 | } | |
880 | ||
881 | static struct device_attribute dev_attr_cdev_type = | |
543a9561 | 882 | __ATTR(type, 0444, thermal_cooling_device_type_show, NULL); |
203d3d4a ZR |
883 | static DEVICE_ATTR(max_state, 0444, |
884 | thermal_cooling_device_max_state_show, NULL); | |
885 | static DEVICE_ATTR(cur_state, 0644, | |
886 | thermal_cooling_device_cur_state_show, | |
887 | thermal_cooling_device_cur_state_store); | |
888 | ||
889 | static ssize_t | |
890 | thermal_cooling_device_trip_point_show(struct device *dev, | |
543a9561 | 891 | struct device_attribute *attr, char *buf) |
203d3d4a | 892 | { |
b81b6ba3 | 893 | struct thermal_instance *instance; |
203d3d4a ZR |
894 | |
895 | instance = | |
b81b6ba3 | 896 | container_of(attr, struct thermal_instance, attr); |
203d3d4a ZR |
897 | |
898 | if (instance->trip == THERMAL_TRIPS_NONE) | |
899 | return sprintf(buf, "-1\n"); | |
900 | else | |
901 | return sprintf(buf, "%d\n", instance->trip); | |
902 | } | |
903 | ||
2dc10f89 MK |
904 | static struct attribute *cooling_device_attrs[] = { |
905 | &dev_attr_cdev_type.attr, | |
906 | &dev_attr_max_state.attr, | |
907 | &dev_attr_cur_state.attr, | |
908 | NULL, | |
909 | }; | |
910 | ||
911 | static const struct attribute_group cooling_device_attr_group = { | |
912 | .attrs = cooling_device_attrs, | |
913 | }; | |
914 | ||
915 | static const struct attribute_group *cooling_device_attr_groups[] = { | |
916 | &cooling_device_attr_group, | |
917 | NULL, | |
918 | }; | |
919 | ||
203d3d4a ZR |
920 | /* Device management */ |
921 | ||
922 | /** | |
d2e4eb83 EV |
923 | * thermal_zone_bind_cooling_device() - bind a cooling device to a thermal zone |
924 | * @tz: pointer to struct thermal_zone_device | |
203d3d4a ZR |
925 | * @trip: indicates which trip point the cooling devices is |
926 | * associated with in this thermal zone. | |
d2e4eb83 EV |
927 | * @cdev: pointer to struct thermal_cooling_device |
928 | * @upper: the Maximum cooling state for this trip point. | |
929 | * THERMAL_NO_LIMIT means no upper limit, | |
930 | * and the cooling device can be in max_state. | |
931 | * @lower: the Minimum cooling state can be used for this trip point. | |
932 | * THERMAL_NO_LIMIT means no lower limit, | |
933 | * and the cooling device can be in cooling state 0. | |
543a9561 | 934 | * |
d2e4eb83 EV |
935 | * This interface function bind a thermal cooling device to the certain trip |
936 | * point of a thermal zone device. | |
543a9561 | 937 | * This function is usually called in the thermal zone device .bind callback. |
d2e4eb83 EV |
938 | * |
939 | * Return: 0 on success, the proper error value otherwise. | |
203d3d4a ZR |
940 | */ |
941 | int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, | |
942 | int trip, | |
9d99842f ZR |
943 | struct thermal_cooling_device *cdev, |
944 | unsigned long upper, unsigned long lower) | |
203d3d4a | 945 | { |
b81b6ba3 ZR |
946 | struct thermal_instance *dev; |
947 | struct thermal_instance *pos; | |
c7516709 TS |
948 | struct thermal_zone_device *pos1; |
949 | struct thermal_cooling_device *pos2; | |
74051ba5 | 950 | unsigned long max_state; |
9a3031dc | 951 | int result, ret; |
203d3d4a | 952 | |
543a9561 | 953 | if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE)) |
203d3d4a ZR |
954 | return -EINVAL; |
955 | ||
c7516709 TS |
956 | list_for_each_entry(pos1, &thermal_tz_list, node) { |
957 | if (pos1 == tz) | |
958 | break; | |
959 | } | |
960 | list_for_each_entry(pos2, &thermal_cdev_list, node) { | |
961 | if (pos2 == cdev) | |
962 | break; | |
963 | } | |
964 | ||
965 | if (tz != pos1 || cdev != pos2) | |
203d3d4a ZR |
966 | return -EINVAL; |
967 | ||
9a3031dc LM |
968 | ret = cdev->ops->get_max_state(cdev, &max_state); |
969 | if (ret) | |
970 | return ret; | |
9d99842f ZR |
971 | |
972 | /* lower default 0, upper default max_state */ | |
973 | lower = lower == THERMAL_NO_LIMIT ? 0 : lower; | |
974 | upper = upper == THERMAL_NO_LIMIT ? max_state : upper; | |
975 | ||
976 | if (lower > upper || upper > max_state) | |
977 | return -EINVAL; | |
978 | ||
203d3d4a | 979 | dev = |
b81b6ba3 | 980 | kzalloc(sizeof(struct thermal_instance), GFP_KERNEL); |
203d3d4a ZR |
981 | if (!dev) |
982 | return -ENOMEM; | |
983 | dev->tz = tz; | |
984 | dev->cdev = cdev; | |
985 | dev->trip = trip; | |
9d99842f ZR |
986 | dev->upper = upper; |
987 | dev->lower = lower; | |
ce119f83 | 988 | dev->target = THERMAL_NO_TARGET; |
74051ba5 | 989 | |
203d3d4a ZR |
990 | result = get_idr(&tz->idr, &tz->lock, &dev->id); |
991 | if (result) | |
992 | goto free_mem; | |
993 | ||
994 | sprintf(dev->name, "cdev%d", dev->id); | |
995 | result = | |
996 | sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev->name); | |
997 | if (result) | |
998 | goto release_idr; | |
999 | ||
1000 | sprintf(dev->attr_name, "cdev%d_trip_point", dev->id); | |
975f8c56 | 1001 | sysfs_attr_init(&dev->attr.attr); |
203d3d4a ZR |
1002 | dev->attr.attr.name = dev->attr_name; |
1003 | dev->attr.attr.mode = 0444; | |
1004 | dev->attr.show = thermal_cooling_device_trip_point_show; | |
1005 | result = device_create_file(&tz->device, &dev->attr); | |
1006 | if (result) | |
1007 | goto remove_symbol_link; | |
1008 | ||
1009 | mutex_lock(&tz->lock); | |
f4a821ce | 1010 | mutex_lock(&cdev->lock); |
cddf31b3 | 1011 | list_for_each_entry(pos, &tz->thermal_instances, tz_node) |
203d3d4a ZR |
1012 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
1013 | result = -EEXIST; | |
1014 | break; | |
1015 | } | |
b5e4ae62 | 1016 | if (!result) { |
cddf31b3 | 1017 | list_add_tail(&dev->tz_node, &tz->thermal_instances); |
b5e4ae62 ZR |
1018 | list_add_tail(&dev->cdev_node, &cdev->thermal_instances); |
1019 | } | |
f4a821ce | 1020 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
1021 | mutex_unlock(&tz->lock); |
1022 | ||
1023 | if (!result) | |
1024 | return 0; | |
1025 | ||
1026 | device_remove_file(&tz->device, &dev->attr); | |
caca8b80 | 1027 | remove_symbol_link: |
203d3d4a | 1028 | sysfs_remove_link(&tz->device.kobj, dev->name); |
caca8b80 | 1029 | release_idr: |
203d3d4a | 1030 | release_idr(&tz->idr, &tz->lock, dev->id); |
caca8b80 | 1031 | free_mem: |
203d3d4a ZR |
1032 | kfree(dev); |
1033 | return result; | |
1034 | } | |
910cb1e3 | 1035 | EXPORT_SYMBOL_GPL(thermal_zone_bind_cooling_device); |
203d3d4a ZR |
1036 | |
1037 | /** | |
9892e5dc EV |
1038 | * thermal_zone_unbind_cooling_device() - unbind a cooling device from a |
1039 | * thermal zone. | |
1040 | * @tz: pointer to a struct thermal_zone_device. | |
203d3d4a ZR |
1041 | * @trip: indicates which trip point the cooling devices is |
1042 | * associated with in this thermal zone. | |
9892e5dc | 1043 | * @cdev: pointer to a struct thermal_cooling_device. |
543a9561 | 1044 | * |
9892e5dc EV |
1045 | * This interface function unbind a thermal cooling device from the certain |
1046 | * trip point of a thermal zone device. | |
543a9561 | 1047 | * This function is usually called in the thermal zone device .unbind callback. |
9892e5dc EV |
1048 | * |
1049 | * Return: 0 on success, the proper error value otherwise. | |
203d3d4a ZR |
1050 | */ |
1051 | int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz, | |
1052 | int trip, | |
1053 | struct thermal_cooling_device *cdev) | |
1054 | { | |
b81b6ba3 | 1055 | struct thermal_instance *pos, *next; |
203d3d4a ZR |
1056 | |
1057 | mutex_lock(&tz->lock); | |
f4a821ce | 1058 | mutex_lock(&cdev->lock); |
cddf31b3 | 1059 | list_for_each_entry_safe(pos, next, &tz->thermal_instances, tz_node) { |
543a9561 | 1060 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
cddf31b3 | 1061 | list_del(&pos->tz_node); |
b5e4ae62 | 1062 | list_del(&pos->cdev_node); |
f4a821ce | 1063 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
1064 | mutex_unlock(&tz->lock); |
1065 | goto unbind; | |
1066 | } | |
1067 | } | |
f4a821ce | 1068 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
1069 | mutex_unlock(&tz->lock); |
1070 | ||
1071 | return -ENODEV; | |
1072 | ||
caca8b80 | 1073 | unbind: |
203d3d4a ZR |
1074 | device_remove_file(&tz->device, &pos->attr); |
1075 | sysfs_remove_link(&tz->device.kobj, pos->name); | |
1076 | release_idr(&tz->idr, &tz->lock, pos->id); | |
1077 | kfree(pos); | |
1078 | return 0; | |
1079 | } | |
910cb1e3 | 1080 | EXPORT_SYMBOL_GPL(thermal_zone_unbind_cooling_device); |
203d3d4a ZR |
1081 | |
1082 | static void thermal_release(struct device *dev) | |
1083 | { | |
1084 | struct thermal_zone_device *tz; | |
1085 | struct thermal_cooling_device *cdev; | |
1086 | ||
caca8b80 JP |
1087 | if (!strncmp(dev_name(dev), "thermal_zone", |
1088 | sizeof("thermal_zone") - 1)) { | |
203d3d4a ZR |
1089 | tz = to_thermal_zone(dev); |
1090 | kfree(tz); | |
732e4c8d | 1091 | } else if(!strncmp(dev_name(dev), "cooling_device", |
1092 | sizeof("cooling_device") - 1)){ | |
203d3d4a ZR |
1093 | cdev = to_cooling_device(dev); |
1094 | kfree(cdev); | |
1095 | } | |
1096 | } | |
1097 | ||
1098 | static struct class thermal_class = { | |
1099 | .name = "thermal", | |
1100 | .dev_release = thermal_release, | |
1101 | }; | |
1102 | ||
1103 | /** | |
a116b5d4 EV |
1104 | * __thermal_cooling_device_register() - register a new thermal cooling device |
1105 | * @np: a pointer to a device tree node. | |
203d3d4a ZR |
1106 | * @type: the thermal cooling device type. |
1107 | * @devdata: device private data. | |
1108 | * @ops: standard thermal cooling devices callbacks. | |
3a6eccb3 EV |
1109 | * |
1110 | * This interface function adds a new thermal cooling device (fan/processor/...) | |
1111 | * to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself | |
1112 | * to all the thermal zone devices registered at the same time. | |
a116b5d4 EV |
1113 | * It also gives the opportunity to link the cooling device to a device tree |
1114 | * node, so that it can be bound to a thermal zone created out of device tree. | |
3a6eccb3 EV |
1115 | * |
1116 | * Return: a pointer to the created struct thermal_cooling_device or an | |
1117 | * ERR_PTR. Caller must check return value with IS_ERR*() helpers. | |
203d3d4a | 1118 | */ |
a116b5d4 EV |
1119 | static struct thermal_cooling_device * |
1120 | __thermal_cooling_device_register(struct device_node *np, | |
1121 | char *type, void *devdata, | |
1122 | const struct thermal_cooling_device_ops *ops) | |
203d3d4a ZR |
1123 | { |
1124 | struct thermal_cooling_device *cdev; | |
203d3d4a ZR |
1125 | int result; |
1126 | ||
204dd1d3 | 1127 | if (type && strlen(type) >= THERMAL_NAME_LENGTH) |
3e6fda5c | 1128 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1129 | |
1130 | if (!ops || !ops->get_max_state || !ops->get_cur_state || | |
543a9561 | 1131 | !ops->set_cur_state) |
3e6fda5c | 1132 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1133 | |
1134 | cdev = kzalloc(sizeof(struct thermal_cooling_device), GFP_KERNEL); | |
1135 | if (!cdev) | |
3e6fda5c | 1136 | return ERR_PTR(-ENOMEM); |
203d3d4a ZR |
1137 | |
1138 | result = get_idr(&thermal_cdev_idr, &thermal_idr_lock, &cdev->id); | |
1139 | if (result) { | |
1140 | kfree(cdev); | |
3e6fda5c | 1141 | return ERR_PTR(result); |
203d3d4a ZR |
1142 | } |
1143 | ||
c7a8b9d9 | 1144 | strlcpy(cdev->type, type ? : "", sizeof(cdev->type)); |
f4a821ce | 1145 | mutex_init(&cdev->lock); |
b5e4ae62 | 1146 | INIT_LIST_HEAD(&cdev->thermal_instances); |
a116b5d4 | 1147 | cdev->np = np; |
203d3d4a | 1148 | cdev->ops = ops; |
5ca0cce5 | 1149 | cdev->updated = false; |
203d3d4a | 1150 | cdev->device.class = &thermal_class; |
2dc10f89 | 1151 | cdev->device.groups = cooling_device_attr_groups; |
203d3d4a | 1152 | cdev->devdata = devdata; |
354655ea | 1153 | dev_set_name(&cdev->device, "cooling_device%d", cdev->id); |
203d3d4a ZR |
1154 | result = device_register(&cdev->device); |
1155 | if (result) { | |
1156 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
1157 | kfree(cdev); | |
3e6fda5c | 1158 | return ERR_PTR(result); |
203d3d4a ZR |
1159 | } |
1160 | ||
7e8ee1e9 | 1161 | /* Add 'this' new cdev to the global cdev list */ |
203d3d4a ZR |
1162 | mutex_lock(&thermal_list_lock); |
1163 | list_add(&cdev->node, &thermal_cdev_list); | |
203d3d4a ZR |
1164 | mutex_unlock(&thermal_list_lock); |
1165 | ||
7e8ee1e9 D |
1166 | /* Update binding information for 'this' new cdev */ |
1167 | bind_cdev(cdev); | |
1168 | ||
1169 | return cdev; | |
203d3d4a | 1170 | } |
a116b5d4 EV |
1171 | |
1172 | /** | |
1173 | * thermal_cooling_device_register() - register a new thermal cooling device | |
1174 | * @type: the thermal cooling device type. | |
1175 | * @devdata: device private data. | |
1176 | * @ops: standard thermal cooling devices callbacks. | |
1177 | * | |
1178 | * This interface function adds a new thermal cooling device (fan/processor/...) | |
1179 | * to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself | |
1180 | * to all the thermal zone devices registered at the same time. | |
1181 | * | |
1182 | * Return: a pointer to the created struct thermal_cooling_device or an | |
1183 | * ERR_PTR. Caller must check return value with IS_ERR*() helpers. | |
1184 | */ | |
1185 | struct thermal_cooling_device * | |
1186 | thermal_cooling_device_register(char *type, void *devdata, | |
1187 | const struct thermal_cooling_device_ops *ops) | |
1188 | { | |
1189 | return __thermal_cooling_device_register(NULL, type, devdata, ops); | |
1190 | } | |
910cb1e3 | 1191 | EXPORT_SYMBOL_GPL(thermal_cooling_device_register); |
203d3d4a | 1192 | |
a116b5d4 EV |
1193 | /** |
1194 | * thermal_of_cooling_device_register() - register an OF thermal cooling device | |
1195 | * @np: a pointer to a device tree node. | |
1196 | * @type: the thermal cooling device type. | |
1197 | * @devdata: device private data. | |
1198 | * @ops: standard thermal cooling devices callbacks. | |
1199 | * | |
1200 | * This function will register a cooling device with device tree node reference. | |
1201 | * This interface function adds a new thermal cooling device (fan/processor/...) | |
1202 | * to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself | |
1203 | * to all the thermal zone devices registered at the same time. | |
1204 | * | |
1205 | * Return: a pointer to the created struct thermal_cooling_device or an | |
1206 | * ERR_PTR. Caller must check return value with IS_ERR*() helpers. | |
1207 | */ | |
1208 | struct thermal_cooling_device * | |
1209 | thermal_of_cooling_device_register(struct device_node *np, | |
1210 | char *type, void *devdata, | |
1211 | const struct thermal_cooling_device_ops *ops) | |
1212 | { | |
1213 | return __thermal_cooling_device_register(np, type, devdata, ops); | |
1214 | } | |
1215 | EXPORT_SYMBOL_GPL(thermal_of_cooling_device_register); | |
1216 | ||
203d3d4a ZR |
1217 | /** |
1218 | * thermal_cooling_device_unregister - removes the registered thermal cooling device | |
203d3d4a ZR |
1219 | * @cdev: the thermal cooling device to remove. |
1220 | * | |
1221 | * thermal_cooling_device_unregister() must be called when the device is no | |
1222 | * longer needed. | |
1223 | */ | |
7e8ee1e9 | 1224 | void thermal_cooling_device_unregister(struct thermal_cooling_device *cdev) |
203d3d4a | 1225 | { |
7e8ee1e9 D |
1226 | int i; |
1227 | const struct thermal_zone_params *tzp; | |
203d3d4a ZR |
1228 | struct thermal_zone_device *tz; |
1229 | struct thermal_cooling_device *pos = NULL; | |
1230 | ||
1231 | if (!cdev) | |
1232 | return; | |
1233 | ||
1234 | mutex_lock(&thermal_list_lock); | |
1235 | list_for_each_entry(pos, &thermal_cdev_list, node) | |
1236 | if (pos == cdev) | |
1237 | break; | |
1238 | if (pos != cdev) { | |
1239 | /* thermal cooling device not found */ | |
1240 | mutex_unlock(&thermal_list_lock); | |
1241 | return; | |
1242 | } | |
1243 | list_del(&cdev->node); | |
7e8ee1e9 D |
1244 | |
1245 | /* Unbind all thermal zones associated with 'this' cdev */ | |
203d3d4a | 1246 | list_for_each_entry(tz, &thermal_tz_list, node) { |
7e8ee1e9 D |
1247 | if (tz->ops->unbind) { |
1248 | tz->ops->unbind(tz, cdev); | |
1249 | continue; | |
1250 | } | |
1251 | ||
1252 | if (!tz->tzp || !tz->tzp->tbp) | |
203d3d4a | 1253 | continue; |
7e8ee1e9 D |
1254 | |
1255 | tzp = tz->tzp; | |
1256 | for (i = 0; i < tzp->num_tbps; i++) { | |
1257 | if (tzp->tbp[i].cdev == cdev) { | |
1258 | __unbind(tz, tzp->tbp[i].trip_mask, cdev); | |
1259 | tzp->tbp[i].cdev = NULL; | |
1260 | } | |
1261 | } | |
203d3d4a | 1262 | } |
7e8ee1e9 | 1263 | |
203d3d4a | 1264 | mutex_unlock(&thermal_list_lock); |
7e8ee1e9 | 1265 | |
203d3d4a | 1266 | if (cdev->type[0]) |
543a9561 | 1267 | device_remove_file(&cdev->device, &dev_attr_cdev_type); |
203d3d4a ZR |
1268 | device_remove_file(&cdev->device, &dev_attr_max_state); |
1269 | device_remove_file(&cdev->device, &dev_attr_cur_state); | |
1270 | ||
1271 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
1272 | device_unregister(&cdev->device); | |
1273 | return; | |
1274 | } | |
910cb1e3 | 1275 | EXPORT_SYMBOL_GPL(thermal_cooling_device_unregister); |
203d3d4a | 1276 | |
dc765482 | 1277 | void thermal_cdev_update(struct thermal_cooling_device *cdev) |
ce119f83 ZR |
1278 | { |
1279 | struct thermal_instance *instance; | |
1280 | unsigned long target = 0; | |
1281 | ||
1282 | /* cooling device is updated*/ | |
1283 | if (cdev->updated) | |
1284 | return; | |
1285 | ||
f4a821ce | 1286 | mutex_lock(&cdev->lock); |
ce119f83 ZR |
1287 | /* Make sure cdev enters the deepest cooling state */ |
1288 | list_for_each_entry(instance, &cdev->thermal_instances, cdev_node) { | |
06475b55 AL |
1289 | dev_dbg(&cdev->device, "zone%d->target=%lu\n", |
1290 | instance->tz->id, instance->target); | |
ce119f83 ZR |
1291 | if (instance->target == THERMAL_NO_TARGET) |
1292 | continue; | |
1293 | if (instance->target > target) | |
1294 | target = instance->target; | |
1295 | } | |
f4a821ce | 1296 | mutex_unlock(&cdev->lock); |
ce119f83 ZR |
1297 | cdev->ops->set_cur_state(cdev, target); |
1298 | cdev->updated = true; | |
39811569 | 1299 | trace_cdev_update(cdev, target); |
06475b55 | 1300 | dev_dbg(&cdev->device, "set to state %lu\n", target); |
ce119f83 | 1301 | } |
dc765482 | 1302 | EXPORT_SYMBOL(thermal_cdev_update); |
ce119f83 | 1303 | |
f2b4caaf | 1304 | /** |
7b73c993 | 1305 | * thermal_notify_framework - Sensor drivers use this API to notify framework |
f2b4caaf D |
1306 | * @tz: thermal zone device |
1307 | * @trip: indicates which trip point has been crossed | |
1308 | * | |
1309 | * This function handles the trip events from sensor drivers. It starts | |
1310 | * throttling the cooling devices according to the policy configured. | |
1311 | * For CRITICAL and HOT trip points, this notifies the respective drivers, | |
1312 | * and does actual throttling for other trip points i.e ACTIVE and PASSIVE. | |
1313 | * The throttling policy is based on the configured platform data; if no | |
1314 | * platform data is provided, this uses the step_wise throttling policy. | |
1315 | */ | |
7b73c993 | 1316 | void thermal_notify_framework(struct thermal_zone_device *tz, int trip) |
f2b4caaf D |
1317 | { |
1318 | handle_thermal_trip(tz, trip); | |
1319 | } | |
910cb1e3 | 1320 | EXPORT_SYMBOL_GPL(thermal_notify_framework); |
f2b4caaf | 1321 | |
c56f5c03 | 1322 | /** |
269c174f | 1323 | * create_trip_attrs() - create attributes for trip points |
c56f5c03 D |
1324 | * @tz: the thermal zone device |
1325 | * @mask: Writeable trip point bitmap. | |
269c174f EV |
1326 | * |
1327 | * helper function to instantiate sysfs entries for every trip | |
1328 | * point and its properties of a struct thermal_zone_device. | |
1329 | * | |
1330 | * Return: 0 on success, the proper error value otherwise. | |
c56f5c03 D |
1331 | */ |
1332 | static int create_trip_attrs(struct thermal_zone_device *tz, int mask) | |
1333 | { | |
1334 | int indx; | |
27365a6c | 1335 | int size = sizeof(struct thermal_attr) * tz->trips; |
c56f5c03 | 1336 | |
27365a6c | 1337 | tz->trip_type_attrs = kzalloc(size, GFP_KERNEL); |
c56f5c03 D |
1338 | if (!tz->trip_type_attrs) |
1339 | return -ENOMEM; | |
1340 | ||
27365a6c | 1341 | tz->trip_temp_attrs = kzalloc(size, GFP_KERNEL); |
c56f5c03 D |
1342 | if (!tz->trip_temp_attrs) { |
1343 | kfree(tz->trip_type_attrs); | |
1344 | return -ENOMEM; | |
1345 | } | |
1346 | ||
27365a6c D |
1347 | if (tz->ops->get_trip_hyst) { |
1348 | tz->trip_hyst_attrs = kzalloc(size, GFP_KERNEL); | |
1349 | if (!tz->trip_hyst_attrs) { | |
1350 | kfree(tz->trip_type_attrs); | |
1351 | kfree(tz->trip_temp_attrs); | |
1352 | return -ENOMEM; | |
1353 | } | |
1354 | } | |
c56f5c03 | 1355 | |
27365a6c D |
1356 | |
1357 | for (indx = 0; indx < tz->trips; indx++) { | |
c56f5c03 D |
1358 | /* create trip type attribute */ |
1359 | snprintf(tz->trip_type_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1360 | "trip_point_%d_type", indx); | |
1361 | ||
1362 | sysfs_attr_init(&tz->trip_type_attrs[indx].attr.attr); | |
1363 | tz->trip_type_attrs[indx].attr.attr.name = | |
1364 | tz->trip_type_attrs[indx].name; | |
1365 | tz->trip_type_attrs[indx].attr.attr.mode = S_IRUGO; | |
1366 | tz->trip_type_attrs[indx].attr.show = trip_point_type_show; | |
1367 | ||
1368 | device_create_file(&tz->device, | |
1369 | &tz->trip_type_attrs[indx].attr); | |
1370 | ||
1371 | /* create trip temp attribute */ | |
1372 | snprintf(tz->trip_temp_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1373 | "trip_point_%d_temp", indx); | |
1374 | ||
1375 | sysfs_attr_init(&tz->trip_temp_attrs[indx].attr.attr); | |
1376 | tz->trip_temp_attrs[indx].attr.attr.name = | |
1377 | tz->trip_temp_attrs[indx].name; | |
1378 | tz->trip_temp_attrs[indx].attr.attr.mode = S_IRUGO; | |
1379 | tz->trip_temp_attrs[indx].attr.show = trip_point_temp_show; | |
1380 | if (mask & (1 << indx)) { | |
1381 | tz->trip_temp_attrs[indx].attr.attr.mode |= S_IWUSR; | |
1382 | tz->trip_temp_attrs[indx].attr.store = | |
1383 | trip_point_temp_store; | |
1384 | } | |
1385 | ||
1386 | device_create_file(&tz->device, | |
1387 | &tz->trip_temp_attrs[indx].attr); | |
27365a6c D |
1388 | |
1389 | /* create Optional trip hyst attribute */ | |
1390 | if (!tz->ops->get_trip_hyst) | |
1391 | continue; | |
1392 | snprintf(tz->trip_hyst_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1393 | "trip_point_%d_hyst", indx); | |
1394 | ||
1395 | sysfs_attr_init(&tz->trip_hyst_attrs[indx].attr.attr); | |
1396 | tz->trip_hyst_attrs[indx].attr.attr.name = | |
1397 | tz->trip_hyst_attrs[indx].name; | |
1398 | tz->trip_hyst_attrs[indx].attr.attr.mode = S_IRUGO; | |
1399 | tz->trip_hyst_attrs[indx].attr.show = trip_point_hyst_show; | |
1400 | if (tz->ops->set_trip_hyst) { | |
1401 | tz->trip_hyst_attrs[indx].attr.attr.mode |= S_IWUSR; | |
1402 | tz->trip_hyst_attrs[indx].attr.store = | |
1403 | trip_point_hyst_store; | |
1404 | } | |
1405 | ||
1406 | device_create_file(&tz->device, | |
1407 | &tz->trip_hyst_attrs[indx].attr); | |
c56f5c03 D |
1408 | } |
1409 | return 0; | |
1410 | } | |
1411 | ||
1412 | static void remove_trip_attrs(struct thermal_zone_device *tz) | |
1413 | { | |
1414 | int indx; | |
1415 | ||
1416 | for (indx = 0; indx < tz->trips; indx++) { | |
1417 | device_remove_file(&tz->device, | |
1418 | &tz->trip_type_attrs[indx].attr); | |
1419 | device_remove_file(&tz->device, | |
1420 | &tz->trip_temp_attrs[indx].attr); | |
27365a6c D |
1421 | if (tz->ops->get_trip_hyst) |
1422 | device_remove_file(&tz->device, | |
1423 | &tz->trip_hyst_attrs[indx].attr); | |
c56f5c03 D |
1424 | } |
1425 | kfree(tz->trip_type_attrs); | |
1426 | kfree(tz->trip_temp_attrs); | |
27365a6c | 1427 | kfree(tz->trip_hyst_attrs); |
c56f5c03 D |
1428 | } |
1429 | ||
203d3d4a | 1430 | /** |
a00e55f9 | 1431 | * thermal_zone_device_register() - register a new thermal zone device |
203d3d4a ZR |
1432 | * @type: the thermal zone device type |
1433 | * @trips: the number of trip points the thermal zone support | |
c56f5c03 | 1434 | * @mask: a bit string indicating the writeablility of trip points |
203d3d4a ZR |
1435 | * @devdata: private device data |
1436 | * @ops: standard thermal zone device callbacks | |
50125a9b | 1437 | * @tzp: thermal zone platform parameters |
b1569e99 MG |
1438 | * @passive_delay: number of milliseconds to wait between polls when |
1439 | * performing passive cooling | |
1440 | * @polling_delay: number of milliseconds to wait between polls when checking | |
1441 | * whether trip points have been crossed (0 for interrupt | |
1442 | * driven systems) | |
203d3d4a | 1443 | * |
a00e55f9 EV |
1444 | * This interface function adds a new thermal zone device (sensor) to |
1445 | * /sys/class/thermal folder as thermal_zone[0-*]. It tries to bind all the | |
1446 | * thermal cooling devices registered at the same time. | |
203d3d4a | 1447 | * thermal_zone_device_unregister() must be called when the device is no |
1b7ddb84 | 1448 | * longer needed. The passive cooling depends on the .get_trend() return value. |
a00e55f9 EV |
1449 | * |
1450 | * Return: a pointer to the created struct thermal_zone_device or an | |
1451 | * in case of error, an ERR_PTR. Caller must check return value with | |
1452 | * IS_ERR*() helpers. | |
203d3d4a | 1453 | */ |
4b1bf587 | 1454 | struct thermal_zone_device *thermal_zone_device_register(const char *type, |
c56f5c03 | 1455 | int trips, int mask, void *devdata, |
4e5e4705 | 1456 | struct thermal_zone_device_ops *ops, |
50125a9b | 1457 | const struct thermal_zone_params *tzp, |
1b7ddb84 | 1458 | int passive_delay, int polling_delay) |
203d3d4a ZR |
1459 | { |
1460 | struct thermal_zone_device *tz; | |
03a971a2 | 1461 | enum thermal_trip_type trip_type; |
203d3d4a ZR |
1462 | int result; |
1463 | int count; | |
03a971a2 | 1464 | int passive = 0; |
203d3d4a | 1465 | |
204dd1d3 | 1466 | if (type && strlen(type) >= THERMAL_NAME_LENGTH) |
3e6fda5c | 1467 | return ERR_PTR(-EINVAL); |
203d3d4a | 1468 | |
c56f5c03 | 1469 | if (trips > THERMAL_MAX_TRIPS || trips < 0 || mask >> trips) |
3e6fda5c | 1470 | return ERR_PTR(-EINVAL); |
203d3d4a | 1471 | |
81bd4e1c | 1472 | if (!ops) |
3e6fda5c | 1473 | return ERR_PTR(-EINVAL); |
203d3d4a | 1474 | |
83720d0b | 1475 | if (trips > 0 && (!ops->get_trip_type || !ops->get_trip_temp)) |
6b2aa51d EV |
1476 | return ERR_PTR(-EINVAL); |
1477 | ||
203d3d4a ZR |
1478 | tz = kzalloc(sizeof(struct thermal_zone_device), GFP_KERNEL); |
1479 | if (!tz) | |
3e6fda5c | 1480 | return ERR_PTR(-ENOMEM); |
203d3d4a | 1481 | |
2d374139 | 1482 | INIT_LIST_HEAD(&tz->thermal_instances); |
203d3d4a ZR |
1483 | idr_init(&tz->idr); |
1484 | mutex_init(&tz->lock); | |
1485 | result = get_idr(&thermal_tz_idr, &thermal_idr_lock, &tz->id); | |
1486 | if (result) { | |
1487 | kfree(tz); | |
3e6fda5c | 1488 | return ERR_PTR(result); |
203d3d4a ZR |
1489 | } |
1490 | ||
c7a8b9d9 | 1491 | strlcpy(tz->type, type ? : "", sizeof(tz->type)); |
203d3d4a | 1492 | tz->ops = ops; |
50125a9b | 1493 | tz->tzp = tzp; |
203d3d4a ZR |
1494 | tz->device.class = &thermal_class; |
1495 | tz->devdata = devdata; | |
1496 | tz->trips = trips; | |
b1569e99 MG |
1497 | tz->passive_delay = passive_delay; |
1498 | tz->polling_delay = polling_delay; | |
1499 | ||
354655ea | 1500 | dev_set_name(&tz->device, "thermal_zone%d", tz->id); |
203d3d4a ZR |
1501 | result = device_register(&tz->device); |
1502 | if (result) { | |
1503 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); | |
1504 | kfree(tz); | |
3e6fda5c | 1505 | return ERR_PTR(result); |
203d3d4a ZR |
1506 | } |
1507 | ||
1508 | /* sys I/F */ | |
1509 | if (type) { | |
1510 | result = device_create_file(&tz->device, &dev_attr_type); | |
1511 | if (result) | |
1512 | goto unregister; | |
1513 | } | |
1514 | ||
1515 | result = device_create_file(&tz->device, &dev_attr_temp); | |
1516 | if (result) | |
1517 | goto unregister; | |
1518 | ||
1519 | if (ops->get_mode) { | |
1520 | result = device_create_file(&tz->device, &dev_attr_mode); | |
1521 | if (result) | |
1522 | goto unregister; | |
1523 | } | |
1524 | ||
c56f5c03 D |
1525 | result = create_trip_attrs(tz, mask); |
1526 | if (result) | |
1527 | goto unregister; | |
1528 | ||
203d3d4a | 1529 | for (count = 0; count < trips; count++) { |
03a971a2 MG |
1530 | tz->ops->get_trip_type(tz, count, &trip_type); |
1531 | if (trip_type == THERMAL_TRIP_PASSIVE) | |
1532 | passive = 1; | |
203d3d4a ZR |
1533 | } |
1534 | ||
5a2c090b D |
1535 | if (!passive) { |
1536 | result = device_create_file(&tz->device, &dev_attr_passive); | |
1537 | if (result) | |
1538 | goto unregister; | |
1539 | } | |
03a971a2 | 1540 | |
e6e238c3 ADK |
1541 | #ifdef CONFIG_THERMAL_EMULATION |
1542 | result = device_create_file(&tz->device, &dev_attr_emul_temp); | |
1543 | if (result) | |
1544 | goto unregister; | |
1545 | #endif | |
5a2c090b D |
1546 | /* Create policy attribute */ |
1547 | result = device_create_file(&tz->device, &dev_attr_policy); | |
03a971a2 MG |
1548 | if (result) |
1549 | goto unregister; | |
1550 | ||
a4a15485 D |
1551 | /* Update 'this' zone's governor information */ |
1552 | mutex_lock(&thermal_governor_lock); | |
1553 | ||
1554 | if (tz->tzp) | |
1555 | tz->governor = __find_governor(tz->tzp->governor_name); | |
1556 | else | |
f2234bcd | 1557 | tz->governor = def_governor; |
a4a15485 D |
1558 | |
1559 | mutex_unlock(&thermal_governor_lock); | |
1560 | ||
ccba4ffd EV |
1561 | if (!tz->tzp || !tz->tzp->no_hwmon) { |
1562 | result = thermal_add_hwmon_sysfs(tz); | |
1563 | if (result) | |
1564 | goto unregister; | |
1565 | } | |
e68b16ab | 1566 | |
203d3d4a ZR |
1567 | mutex_lock(&thermal_list_lock); |
1568 | list_add_tail(&tz->node, &thermal_tz_list); | |
203d3d4a ZR |
1569 | mutex_unlock(&thermal_list_lock); |
1570 | ||
7e8ee1e9 D |
1571 | /* Bind cooling devices for this zone */ |
1572 | bind_tz(tz); | |
1573 | ||
b1569e99 MG |
1574 | INIT_DELAYED_WORK(&(tz->poll_queue), thermal_zone_device_check); |
1575 | ||
81bd4e1c EV |
1576 | if (!tz->ops->get_temp) |
1577 | thermal_zone_device_set_polling(tz, 0); | |
1578 | ||
b1569e99 MG |
1579 | thermal_zone_device_update(tz); |
1580 | ||
14015860 | 1581 | return tz; |
203d3d4a | 1582 | |
caca8b80 | 1583 | unregister: |
203d3d4a ZR |
1584 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1585 | device_unregister(&tz->device); | |
3e6fda5c | 1586 | return ERR_PTR(result); |
203d3d4a | 1587 | } |
910cb1e3 | 1588 | EXPORT_SYMBOL_GPL(thermal_zone_device_register); |
203d3d4a ZR |
1589 | |
1590 | /** | |
1591 | * thermal_device_unregister - removes the registered thermal zone device | |
203d3d4a ZR |
1592 | * @tz: the thermal zone device to remove |
1593 | */ | |
1594 | void thermal_zone_device_unregister(struct thermal_zone_device *tz) | |
1595 | { | |
7e8ee1e9 D |
1596 | int i; |
1597 | const struct thermal_zone_params *tzp; | |
203d3d4a ZR |
1598 | struct thermal_cooling_device *cdev; |
1599 | struct thermal_zone_device *pos = NULL; | |
203d3d4a ZR |
1600 | |
1601 | if (!tz) | |
1602 | return; | |
1603 | ||
7e8ee1e9 D |
1604 | tzp = tz->tzp; |
1605 | ||
203d3d4a ZR |
1606 | mutex_lock(&thermal_list_lock); |
1607 | list_for_each_entry(pos, &thermal_tz_list, node) | |
1608 | if (pos == tz) | |
1609 | break; | |
1610 | if (pos != tz) { | |
1611 | /* thermal zone device not found */ | |
1612 | mutex_unlock(&thermal_list_lock); | |
1613 | return; | |
1614 | } | |
1615 | list_del(&tz->node); | |
7e8ee1e9 D |
1616 | |
1617 | /* Unbind all cdevs associated with 'this' thermal zone */ | |
1618 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
1619 | if (tz->ops->unbind) { | |
1620 | tz->ops->unbind(tz, cdev); | |
1621 | continue; | |
1622 | } | |
1623 | ||
1624 | if (!tzp || !tzp->tbp) | |
1625 | break; | |
1626 | ||
1627 | for (i = 0; i < tzp->num_tbps; i++) { | |
1628 | if (tzp->tbp[i].cdev == cdev) { | |
1629 | __unbind(tz, tzp->tbp[i].trip_mask, cdev); | |
1630 | tzp->tbp[i].cdev = NULL; | |
1631 | } | |
1632 | } | |
1633 | } | |
1634 | ||
203d3d4a ZR |
1635 | mutex_unlock(&thermal_list_lock); |
1636 | ||
b1569e99 MG |
1637 | thermal_zone_device_set_polling(tz, 0); |
1638 | ||
203d3d4a ZR |
1639 | if (tz->type[0]) |
1640 | device_remove_file(&tz->device, &dev_attr_type); | |
1641 | device_remove_file(&tz->device, &dev_attr_temp); | |
1642 | if (tz->ops->get_mode) | |
1643 | device_remove_file(&tz->device, &dev_attr_mode); | |
5a2c090b | 1644 | device_remove_file(&tz->device, &dev_attr_policy); |
c56f5c03 | 1645 | remove_trip_attrs(tz); |
a4a15485 | 1646 | tz->governor = NULL; |
203d3d4a | 1647 | |
e68b16ab | 1648 | thermal_remove_hwmon_sysfs(tz); |
203d3d4a ZR |
1649 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1650 | idr_destroy(&tz->idr); | |
1651 | mutex_destroy(&tz->lock); | |
1652 | device_unregister(&tz->device); | |
1653 | return; | |
1654 | } | |
910cb1e3 | 1655 | EXPORT_SYMBOL_GPL(thermal_zone_device_unregister); |
203d3d4a | 1656 | |
63c4d919 EV |
1657 | /** |
1658 | * thermal_zone_get_zone_by_name() - search for a zone and returns its ref | |
1659 | * @name: thermal zone name to fetch the temperature | |
1660 | * | |
1661 | * When only one zone is found with the passed name, returns a reference to it. | |
1662 | * | |
1663 | * Return: On success returns a reference to an unique thermal zone with | |
1664 | * matching name equals to @name, an ERR_PTR otherwise (-EINVAL for invalid | |
1665 | * paramenters, -ENODEV for not found and -EEXIST for multiple matches). | |
1666 | */ | |
1667 | struct thermal_zone_device *thermal_zone_get_zone_by_name(const char *name) | |
1668 | { | |
1669 | struct thermal_zone_device *pos = NULL, *ref = ERR_PTR(-EINVAL); | |
1670 | unsigned int found = 0; | |
1671 | ||
1672 | if (!name) | |
1673 | goto exit; | |
1674 | ||
1675 | mutex_lock(&thermal_list_lock); | |
1676 | list_for_each_entry(pos, &thermal_tz_list, node) | |
484ac2f3 | 1677 | if (!strncasecmp(name, pos->type, THERMAL_NAME_LENGTH)) { |
63c4d919 EV |
1678 | found++; |
1679 | ref = pos; | |
1680 | } | |
1681 | mutex_unlock(&thermal_list_lock); | |
1682 | ||
1683 | /* nothing has been found, thus an error code for it */ | |
1684 | if (found == 0) | |
1685 | ref = ERR_PTR(-ENODEV); | |
1686 | else if (found > 1) | |
1687 | /* Success only when an unique zone is found */ | |
1688 | ref = ERR_PTR(-EEXIST); | |
1689 | ||
1690 | exit: | |
1691 | return ref; | |
1692 | } | |
1693 | EXPORT_SYMBOL_GPL(thermal_zone_get_zone_by_name); | |
1694 | ||
af06216a | 1695 | #ifdef CONFIG_NET |
2a94fe48 JB |
1696 | static const struct genl_multicast_group thermal_event_mcgrps[] = { |
1697 | { .name = THERMAL_GENL_MCAST_GROUP_NAME, }, | |
1698 | }; | |
1699 | ||
af06216a RW |
1700 | static struct genl_family thermal_event_genl_family = { |
1701 | .id = GENL_ID_GENERATE, | |
1702 | .name = THERMAL_GENL_FAMILY_NAME, | |
1703 | .version = THERMAL_GENL_VERSION, | |
1704 | .maxattr = THERMAL_GENL_ATTR_MAX, | |
2a94fe48 JB |
1705 | .mcgrps = thermal_event_mcgrps, |
1706 | .n_mcgrps = ARRAY_SIZE(thermal_event_mcgrps), | |
af06216a RW |
1707 | }; |
1708 | ||
8ab3e6a0 EV |
1709 | int thermal_generate_netlink_event(struct thermal_zone_device *tz, |
1710 | enum events event) | |
4cb18728 D |
1711 | { |
1712 | struct sk_buff *skb; | |
1713 | struct nlattr *attr; | |
1714 | struct thermal_genl_event *thermal_event; | |
1715 | void *msg_header; | |
1716 | int size; | |
1717 | int result; | |
b11de07c | 1718 | static unsigned int thermal_event_seqnum; |
4cb18728 | 1719 | |
8ab3e6a0 EV |
1720 | if (!tz) |
1721 | return -EINVAL; | |
1722 | ||
4cb18728 | 1723 | /* allocate memory */ |
886ee546 JP |
1724 | size = nla_total_size(sizeof(struct thermal_genl_event)) + |
1725 | nla_total_size(0); | |
4cb18728 D |
1726 | |
1727 | skb = genlmsg_new(size, GFP_ATOMIC); | |
1728 | if (!skb) | |
1729 | return -ENOMEM; | |
1730 | ||
1731 | /* add the genetlink message header */ | |
1732 | msg_header = genlmsg_put(skb, 0, thermal_event_seqnum++, | |
1733 | &thermal_event_genl_family, 0, | |
1734 | THERMAL_GENL_CMD_EVENT); | |
1735 | if (!msg_header) { | |
1736 | nlmsg_free(skb); | |
1737 | return -ENOMEM; | |
1738 | } | |
1739 | ||
1740 | /* fill the data */ | |
886ee546 JP |
1741 | attr = nla_reserve(skb, THERMAL_GENL_ATTR_EVENT, |
1742 | sizeof(struct thermal_genl_event)); | |
4cb18728 D |
1743 | |
1744 | if (!attr) { | |
1745 | nlmsg_free(skb); | |
1746 | return -EINVAL; | |
1747 | } | |
1748 | ||
1749 | thermal_event = nla_data(attr); | |
1750 | if (!thermal_event) { | |
1751 | nlmsg_free(skb); | |
1752 | return -EINVAL; | |
1753 | } | |
1754 | ||
1755 | memset(thermal_event, 0, sizeof(struct thermal_genl_event)); | |
1756 | ||
8ab3e6a0 | 1757 | thermal_event->orig = tz->id; |
4cb18728 D |
1758 | thermal_event->event = event; |
1759 | ||
1760 | /* send multicast genetlink message */ | |
053c095a | 1761 | genlmsg_end(skb, msg_header); |
4cb18728 | 1762 | |
68eb5503 | 1763 | result = genlmsg_multicast(&thermal_event_genl_family, skb, 0, |
2a94fe48 | 1764 | 0, GFP_ATOMIC); |
4cb18728 | 1765 | if (result) |
923e0b1e | 1766 | dev_err(&tz->device, "Failed to send netlink event:%d", result); |
4cb18728 D |
1767 | |
1768 | return result; | |
1769 | } | |
910cb1e3 | 1770 | EXPORT_SYMBOL_GPL(thermal_generate_netlink_event); |
4cb18728 D |
1771 | |
1772 | static int genetlink_init(void) | |
1773 | { | |
2a94fe48 | 1774 | return genl_register_family(&thermal_event_genl_family); |
4cb18728 D |
1775 | } |
1776 | ||
af06216a RW |
1777 | static void genetlink_exit(void) |
1778 | { | |
1779 | genl_unregister_family(&thermal_event_genl_family); | |
1780 | } | |
1781 | #else /* !CONFIG_NET */ | |
1782 | static inline int genetlink_init(void) { return 0; } | |
1783 | static inline void genetlink_exit(void) {} | |
1784 | #endif /* !CONFIG_NET */ | |
1785 | ||
80a26a5c ZR |
1786 | static int __init thermal_register_governors(void) |
1787 | { | |
1788 | int result; | |
1789 | ||
1790 | result = thermal_gov_step_wise_register(); | |
1791 | if (result) | |
1792 | return result; | |
1793 | ||
1794 | result = thermal_gov_fair_share_register(); | |
1795 | if (result) | |
1796 | return result; | |
1797 | ||
e4dbf98f PF |
1798 | result = thermal_gov_bang_bang_register(); |
1799 | if (result) | |
1800 | return result; | |
1801 | ||
80a26a5c ZR |
1802 | return thermal_gov_user_space_register(); |
1803 | } | |
1804 | ||
1805 | static void thermal_unregister_governors(void) | |
1806 | { | |
1807 | thermal_gov_step_wise_unregister(); | |
1808 | thermal_gov_fair_share_unregister(); | |
e4dbf98f | 1809 | thermal_gov_bang_bang_unregister(); |
80a26a5c ZR |
1810 | thermal_gov_user_space_unregister(); |
1811 | } | |
1812 | ||
203d3d4a ZR |
1813 | static int __init thermal_init(void) |
1814 | { | |
80a26a5c ZR |
1815 | int result; |
1816 | ||
1817 | result = thermal_register_governors(); | |
1818 | if (result) | |
1819 | goto error; | |
203d3d4a ZR |
1820 | |
1821 | result = class_register(&thermal_class); | |
80a26a5c ZR |
1822 | if (result) |
1823 | goto unregister_governors; | |
1824 | ||
4cb18728 | 1825 | result = genetlink_init(); |
80a26a5c ZR |
1826 | if (result) |
1827 | goto unregister_class; | |
1828 | ||
4e5e4705 EV |
1829 | result = of_parse_thermal_zones(); |
1830 | if (result) | |
1831 | goto exit_netlink; | |
1832 | ||
80a26a5c ZR |
1833 | return 0; |
1834 | ||
4e5e4705 EV |
1835 | exit_netlink: |
1836 | genetlink_exit(); | |
80a26a5c ZR |
1837 | unregister_class: |
1838 | class_unregister(&thermal_class); | |
9d367e5e LH |
1839 | unregister_governors: |
1840 | thermal_unregister_governors(); | |
80a26a5c ZR |
1841 | error: |
1842 | idr_destroy(&thermal_tz_idr); | |
1843 | idr_destroy(&thermal_cdev_idr); | |
1844 | mutex_destroy(&thermal_idr_lock); | |
1845 | mutex_destroy(&thermal_list_lock); | |
1846 | mutex_destroy(&thermal_governor_lock); | |
203d3d4a ZR |
1847 | return result; |
1848 | } | |
1849 | ||
1850 | static void __exit thermal_exit(void) | |
1851 | { | |
4e5e4705 | 1852 | of_thermal_destroy_zones(); |
80a26a5c | 1853 | genetlink_exit(); |
203d3d4a | 1854 | class_unregister(&thermal_class); |
80a26a5c | 1855 | thermal_unregister_governors(); |
203d3d4a ZR |
1856 | idr_destroy(&thermal_tz_idr); |
1857 | idr_destroy(&thermal_cdev_idr); | |
1858 | mutex_destroy(&thermal_idr_lock); | |
1859 | mutex_destroy(&thermal_list_lock); | |
80a26a5c | 1860 | mutex_destroy(&thermal_governor_lock); |
203d3d4a ZR |
1861 | } |
1862 | ||
4cb18728 | 1863 | fs_initcall(thermal_init); |
203d3d4a | 1864 | module_exit(thermal_exit); |