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) { |
923e0b1e EV |
461 | dev_warn(&tz->device, "failed to read out thermal zone %d\n", |
462 | tz->id); | |
e6e238c3 | 463 | return; |
0c01ebbf D |
464 | } |
465 | ||
e6e238c3 | 466 | mutex_lock(&tz->lock); |
0c01ebbf D |
467 | tz->last_temperature = tz->temperature; |
468 | tz->temperature = temp; | |
0c01ebbf | 469 | mutex_unlock(&tz->lock); |
06475b55 | 470 | |
100a8fdb | 471 | trace_thermal_temperature(tz); |
06475b55 AL |
472 | dev_dbg(&tz->device, "last_temperature=%d, current_temperature=%d\n", |
473 | tz->last_temperature, tz->temperature); | |
0c01ebbf D |
474 | } |
475 | ||
476 | void thermal_zone_device_update(struct thermal_zone_device *tz) | |
477 | { | |
478 | int count; | |
479 | ||
81bd4e1c EV |
480 | if (!tz->ops->get_temp) |
481 | return; | |
482 | ||
0c01ebbf D |
483 | update_temperature(tz); |
484 | ||
485 | for (count = 0; count < tz->trips; count++) | |
486 | handle_thermal_trip(tz, count); | |
487 | } | |
910cb1e3 | 488 | EXPORT_SYMBOL_GPL(thermal_zone_device_update); |
0c01ebbf D |
489 | |
490 | static void thermal_zone_device_check(struct work_struct *work) | |
491 | { | |
492 | struct thermal_zone_device *tz = container_of(work, struct | |
493 | thermal_zone_device, | |
494 | poll_queue.work); | |
495 | thermal_zone_device_update(tz); | |
496 | } | |
497 | ||
203d3d4a ZR |
498 | /* sys I/F for thermal zone */ |
499 | ||
500 | #define to_thermal_zone(_dev) \ | |
501 | container_of(_dev, struct thermal_zone_device, device) | |
502 | ||
503 | static ssize_t | |
504 | type_show(struct device *dev, struct device_attribute *attr, char *buf) | |
505 | { | |
506 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
507 | ||
508 | return sprintf(buf, "%s\n", tz->type); | |
509 | } | |
510 | ||
511 | static ssize_t | |
512 | temp_show(struct device *dev, struct device_attribute *attr, char *buf) | |
513 | { | |
514 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
515 | long temperature; |
516 | int ret; | |
203d3d4a | 517 | |
e6e238c3 | 518 | ret = thermal_zone_get_temp(tz, &temperature); |
6503e5df MG |
519 | |
520 | if (ret) | |
521 | return ret; | |
522 | ||
523 | return sprintf(buf, "%ld\n", temperature); | |
203d3d4a ZR |
524 | } |
525 | ||
526 | static ssize_t | |
527 | mode_show(struct device *dev, struct device_attribute *attr, char *buf) | |
528 | { | |
529 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
530 | enum thermal_device_mode mode; |
531 | int result; | |
203d3d4a ZR |
532 | |
533 | if (!tz->ops->get_mode) | |
534 | return -EPERM; | |
535 | ||
6503e5df MG |
536 | result = tz->ops->get_mode(tz, &mode); |
537 | if (result) | |
538 | return result; | |
539 | ||
540 | return sprintf(buf, "%s\n", mode == THERMAL_DEVICE_ENABLED ? "enabled" | |
541 | : "disabled"); | |
203d3d4a ZR |
542 | } |
543 | ||
544 | static ssize_t | |
545 | mode_store(struct device *dev, struct device_attribute *attr, | |
546 | const char *buf, size_t count) | |
547 | { | |
548 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
549 | int result; | |
550 | ||
551 | if (!tz->ops->set_mode) | |
552 | return -EPERM; | |
553 | ||
f1f0e2ac | 554 | if (!strncmp(buf, "enabled", sizeof("enabled") - 1)) |
6503e5df | 555 | result = tz->ops->set_mode(tz, THERMAL_DEVICE_ENABLED); |
f1f0e2ac | 556 | else if (!strncmp(buf, "disabled", sizeof("disabled") - 1)) |
6503e5df MG |
557 | result = tz->ops->set_mode(tz, THERMAL_DEVICE_DISABLED); |
558 | else | |
559 | result = -EINVAL; | |
560 | ||
203d3d4a ZR |
561 | if (result) |
562 | return result; | |
563 | ||
564 | return count; | |
565 | } | |
566 | ||
567 | static ssize_t | |
568 | trip_point_type_show(struct device *dev, struct device_attribute *attr, | |
569 | char *buf) | |
570 | { | |
571 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
572 | enum thermal_trip_type type; |
573 | int trip, result; | |
203d3d4a ZR |
574 | |
575 | if (!tz->ops->get_trip_type) | |
576 | return -EPERM; | |
577 | ||
578 | if (!sscanf(attr->attr.name, "trip_point_%d_type", &trip)) | |
579 | return -EINVAL; | |
580 | ||
6503e5df MG |
581 | result = tz->ops->get_trip_type(tz, trip, &type); |
582 | if (result) | |
583 | return result; | |
584 | ||
585 | switch (type) { | |
586 | case THERMAL_TRIP_CRITICAL: | |
625120a4 | 587 | return sprintf(buf, "critical\n"); |
6503e5df | 588 | case THERMAL_TRIP_HOT: |
625120a4 | 589 | return sprintf(buf, "hot\n"); |
6503e5df | 590 | case THERMAL_TRIP_PASSIVE: |
625120a4 | 591 | return sprintf(buf, "passive\n"); |
6503e5df | 592 | case THERMAL_TRIP_ACTIVE: |
625120a4 | 593 | return sprintf(buf, "active\n"); |
6503e5df | 594 | default: |
625120a4 | 595 | return sprintf(buf, "unknown\n"); |
6503e5df | 596 | } |
203d3d4a ZR |
597 | } |
598 | ||
c56f5c03 D |
599 | static ssize_t |
600 | trip_point_temp_store(struct device *dev, struct device_attribute *attr, | |
601 | const char *buf, size_t count) | |
602 | { | |
603 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
604 | int trip, ret; | |
605 | unsigned long temperature; | |
606 | ||
607 | if (!tz->ops->set_trip_temp) | |
608 | return -EPERM; | |
609 | ||
610 | if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip)) | |
611 | return -EINVAL; | |
612 | ||
613 | if (kstrtoul(buf, 10, &temperature)) | |
614 | return -EINVAL; | |
615 | ||
616 | ret = tz->ops->set_trip_temp(tz, trip, temperature); | |
617 | ||
618 | return ret ? ret : count; | |
619 | } | |
620 | ||
203d3d4a ZR |
621 | static ssize_t |
622 | trip_point_temp_show(struct device *dev, struct device_attribute *attr, | |
623 | char *buf) | |
624 | { | |
625 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
626 | int trip, ret; |
627 | long temperature; | |
203d3d4a ZR |
628 | |
629 | if (!tz->ops->get_trip_temp) | |
630 | return -EPERM; | |
631 | ||
632 | if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip)) | |
633 | return -EINVAL; | |
634 | ||
6503e5df MG |
635 | ret = tz->ops->get_trip_temp(tz, trip, &temperature); |
636 | ||
637 | if (ret) | |
638 | return ret; | |
639 | ||
640 | return sprintf(buf, "%ld\n", temperature); | |
203d3d4a ZR |
641 | } |
642 | ||
27365a6c D |
643 | static ssize_t |
644 | trip_point_hyst_store(struct device *dev, struct device_attribute *attr, | |
645 | const char *buf, size_t count) | |
646 | { | |
647 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
648 | int trip, ret; | |
649 | unsigned long temperature; | |
650 | ||
651 | if (!tz->ops->set_trip_hyst) | |
652 | return -EPERM; | |
653 | ||
654 | if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip)) | |
655 | return -EINVAL; | |
656 | ||
657 | if (kstrtoul(buf, 10, &temperature)) | |
658 | return -EINVAL; | |
659 | ||
660 | /* | |
661 | * We are not doing any check on the 'temperature' value | |
662 | * here. The driver implementing 'set_trip_hyst' has to | |
663 | * take care of this. | |
664 | */ | |
665 | ret = tz->ops->set_trip_hyst(tz, trip, temperature); | |
666 | ||
667 | return ret ? ret : count; | |
668 | } | |
669 | ||
670 | static ssize_t | |
671 | trip_point_hyst_show(struct device *dev, struct device_attribute *attr, | |
672 | char *buf) | |
673 | { | |
674 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
675 | int trip, ret; | |
676 | unsigned long temperature; | |
677 | ||
678 | if (!tz->ops->get_trip_hyst) | |
679 | return -EPERM; | |
680 | ||
681 | if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip)) | |
682 | return -EINVAL; | |
683 | ||
684 | ret = tz->ops->get_trip_hyst(tz, trip, &temperature); | |
685 | ||
686 | return ret ? ret : sprintf(buf, "%ld\n", temperature); | |
687 | } | |
688 | ||
03a971a2 MG |
689 | static ssize_t |
690 | passive_store(struct device *dev, struct device_attribute *attr, | |
691 | const char *buf, size_t count) | |
692 | { | |
693 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
694 | struct thermal_cooling_device *cdev = NULL; | |
695 | int state; | |
696 | ||
697 | if (!sscanf(buf, "%d\n", &state)) | |
698 | return -EINVAL; | |
699 | ||
3d8e3ad8 FP |
700 | /* sanity check: values below 1000 millicelcius don't make sense |
701 | * and can cause the system to go into a thermal heart attack | |
702 | */ | |
703 | if (state && state < 1000) | |
704 | return -EINVAL; | |
705 | ||
03a971a2 MG |
706 | if (state && !tz->forced_passive) { |
707 | mutex_lock(&thermal_list_lock); | |
708 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
709 | if (!strncmp("Processor", cdev->type, | |
710 | sizeof("Processor"))) | |
711 | thermal_zone_bind_cooling_device(tz, | |
9d99842f ZR |
712 | THERMAL_TRIPS_NONE, cdev, |
713 | THERMAL_NO_LIMIT, | |
714 | THERMAL_NO_LIMIT); | |
03a971a2 MG |
715 | } |
716 | mutex_unlock(&thermal_list_lock); | |
e4143b03 FP |
717 | if (!tz->passive_delay) |
718 | tz->passive_delay = 1000; | |
03a971a2 MG |
719 | } else if (!state && tz->forced_passive) { |
720 | mutex_lock(&thermal_list_lock); | |
721 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
722 | if (!strncmp("Processor", cdev->type, | |
723 | sizeof("Processor"))) | |
724 | thermal_zone_unbind_cooling_device(tz, | |
725 | THERMAL_TRIPS_NONE, | |
726 | cdev); | |
727 | } | |
728 | mutex_unlock(&thermal_list_lock); | |
e4143b03 | 729 | tz->passive_delay = 0; |
03a971a2 MG |
730 | } |
731 | ||
03a971a2 MG |
732 | tz->forced_passive = state; |
733 | ||
734 | thermal_zone_device_update(tz); | |
735 | ||
736 | return count; | |
737 | } | |
738 | ||
739 | static ssize_t | |
740 | passive_show(struct device *dev, struct device_attribute *attr, | |
741 | char *buf) | |
742 | { | |
743 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
744 | ||
745 | return sprintf(buf, "%d\n", tz->forced_passive); | |
746 | } | |
747 | ||
5a2c090b D |
748 | static ssize_t |
749 | policy_store(struct device *dev, struct device_attribute *attr, | |
750 | const char *buf, size_t count) | |
751 | { | |
752 | int ret = -EINVAL; | |
753 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
754 | struct thermal_governor *gov; | |
42a5bf50 AS |
755 | char name[THERMAL_NAME_LENGTH]; |
756 | ||
757 | snprintf(name, sizeof(name), "%s", buf); | |
5a2c090b D |
758 | |
759 | mutex_lock(&thermal_governor_lock); | |
b6cc772f | 760 | mutex_lock(&tz->lock); |
5a2c090b | 761 | |
42a5bf50 | 762 | gov = __find_governor(strim(name)); |
5a2c090b D |
763 | if (!gov) |
764 | goto exit; | |
765 | ||
766 | tz->governor = gov; | |
767 | ret = count; | |
768 | ||
769 | exit: | |
b6cc772f | 770 | mutex_unlock(&tz->lock); |
5a2c090b D |
771 | mutex_unlock(&thermal_governor_lock); |
772 | return ret; | |
773 | } | |
774 | ||
775 | static ssize_t | |
776 | policy_show(struct device *dev, struct device_attribute *devattr, char *buf) | |
777 | { | |
778 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
779 | ||
780 | return sprintf(buf, "%s\n", tz->governor->name); | |
781 | } | |
782 | ||
e6e238c3 ADK |
783 | #ifdef CONFIG_THERMAL_EMULATION |
784 | static ssize_t | |
785 | emul_temp_store(struct device *dev, struct device_attribute *attr, | |
786 | const char *buf, size_t count) | |
787 | { | |
788 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
789 | int ret = 0; | |
790 | unsigned long temperature; | |
791 | ||
792 | if (kstrtoul(buf, 10, &temperature)) | |
793 | return -EINVAL; | |
794 | ||
795 | if (!tz->ops->set_emul_temp) { | |
796 | mutex_lock(&tz->lock); | |
797 | tz->emul_temperature = temperature; | |
798 | mutex_unlock(&tz->lock); | |
799 | } else { | |
800 | ret = tz->ops->set_emul_temp(tz, temperature); | |
801 | } | |
802 | ||
800744bf T |
803 | if (!ret) |
804 | thermal_zone_device_update(tz); | |
805 | ||
e6e238c3 ADK |
806 | return ret ? ret : count; |
807 | } | |
808 | static DEVICE_ATTR(emul_temp, S_IWUSR, NULL, emul_temp_store); | |
809 | #endif/*CONFIG_THERMAL_EMULATION*/ | |
810 | ||
203d3d4a ZR |
811 | static DEVICE_ATTR(type, 0444, type_show, NULL); |
812 | static DEVICE_ATTR(temp, 0444, temp_show, NULL); | |
813 | static DEVICE_ATTR(mode, 0644, mode_show, mode_store); | |
886ee546 | 814 | static DEVICE_ATTR(passive, S_IRUGO | S_IWUSR, passive_show, passive_store); |
5a2c090b | 815 | static DEVICE_ATTR(policy, S_IRUGO | S_IWUSR, policy_show, policy_store); |
203d3d4a | 816 | |
203d3d4a ZR |
817 | /* sys I/F for cooling device */ |
818 | #define to_cooling_device(_dev) \ | |
819 | container_of(_dev, struct thermal_cooling_device, device) | |
820 | ||
821 | static ssize_t | |
822 | thermal_cooling_device_type_show(struct device *dev, | |
823 | struct device_attribute *attr, char *buf) | |
824 | { | |
825 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
826 | ||
827 | return sprintf(buf, "%s\n", cdev->type); | |
828 | } | |
829 | ||
830 | static ssize_t | |
831 | thermal_cooling_device_max_state_show(struct device *dev, | |
832 | struct device_attribute *attr, char *buf) | |
833 | { | |
834 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df MG |
835 | unsigned long state; |
836 | int ret; | |
203d3d4a | 837 | |
6503e5df MG |
838 | ret = cdev->ops->get_max_state(cdev, &state); |
839 | if (ret) | |
840 | return ret; | |
841 | return sprintf(buf, "%ld\n", state); | |
203d3d4a ZR |
842 | } |
843 | ||
844 | static ssize_t | |
845 | thermal_cooling_device_cur_state_show(struct device *dev, | |
846 | struct device_attribute *attr, char *buf) | |
847 | { | |
848 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df MG |
849 | unsigned long state; |
850 | int ret; | |
203d3d4a | 851 | |
6503e5df MG |
852 | ret = cdev->ops->get_cur_state(cdev, &state); |
853 | if (ret) | |
854 | return ret; | |
855 | return sprintf(buf, "%ld\n", state); | |
203d3d4a ZR |
856 | } |
857 | ||
858 | static ssize_t | |
859 | thermal_cooling_device_cur_state_store(struct device *dev, | |
860 | struct device_attribute *attr, | |
861 | const char *buf, size_t count) | |
862 | { | |
863 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df | 864 | unsigned long state; |
203d3d4a ZR |
865 | int result; |
866 | ||
6503e5df | 867 | if (!sscanf(buf, "%ld\n", &state)) |
203d3d4a ZR |
868 | return -EINVAL; |
869 | ||
edb94918 | 870 | if ((long)state < 0) |
203d3d4a ZR |
871 | return -EINVAL; |
872 | ||
873 | result = cdev->ops->set_cur_state(cdev, state); | |
874 | if (result) | |
875 | return result; | |
876 | return count; | |
877 | } | |
878 | ||
879 | static struct device_attribute dev_attr_cdev_type = | |
543a9561 | 880 | __ATTR(type, 0444, thermal_cooling_device_type_show, NULL); |
203d3d4a ZR |
881 | static DEVICE_ATTR(max_state, 0444, |
882 | thermal_cooling_device_max_state_show, NULL); | |
883 | static DEVICE_ATTR(cur_state, 0644, | |
884 | thermal_cooling_device_cur_state_show, | |
885 | thermal_cooling_device_cur_state_store); | |
886 | ||
887 | static ssize_t | |
888 | thermal_cooling_device_trip_point_show(struct device *dev, | |
543a9561 | 889 | struct device_attribute *attr, char *buf) |
203d3d4a | 890 | { |
b81b6ba3 | 891 | struct thermal_instance *instance; |
203d3d4a ZR |
892 | |
893 | instance = | |
b81b6ba3 | 894 | container_of(attr, struct thermal_instance, attr); |
203d3d4a ZR |
895 | |
896 | if (instance->trip == THERMAL_TRIPS_NONE) | |
897 | return sprintf(buf, "-1\n"); | |
898 | else | |
899 | return sprintf(buf, "%d\n", instance->trip); | |
900 | } | |
901 | ||
902 | /* Device management */ | |
903 | ||
904 | /** | |
d2e4eb83 EV |
905 | * thermal_zone_bind_cooling_device() - bind a cooling device to a thermal zone |
906 | * @tz: pointer to struct thermal_zone_device | |
203d3d4a ZR |
907 | * @trip: indicates which trip point the cooling devices is |
908 | * associated with in this thermal zone. | |
d2e4eb83 EV |
909 | * @cdev: pointer to struct thermal_cooling_device |
910 | * @upper: the Maximum cooling state for this trip point. | |
911 | * THERMAL_NO_LIMIT means no upper limit, | |
912 | * and the cooling device can be in max_state. | |
913 | * @lower: the Minimum cooling state can be used for this trip point. | |
914 | * THERMAL_NO_LIMIT means no lower limit, | |
915 | * and the cooling device can be in cooling state 0. | |
543a9561 | 916 | * |
d2e4eb83 EV |
917 | * This interface function bind a thermal cooling device to the certain trip |
918 | * point of a thermal zone device. | |
543a9561 | 919 | * This function is usually called in the thermal zone device .bind callback. |
d2e4eb83 EV |
920 | * |
921 | * Return: 0 on success, the proper error value otherwise. | |
203d3d4a ZR |
922 | */ |
923 | int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, | |
924 | int trip, | |
9d99842f ZR |
925 | struct thermal_cooling_device *cdev, |
926 | unsigned long upper, unsigned long lower) | |
203d3d4a | 927 | { |
b81b6ba3 ZR |
928 | struct thermal_instance *dev; |
929 | struct thermal_instance *pos; | |
c7516709 TS |
930 | struct thermal_zone_device *pos1; |
931 | struct thermal_cooling_device *pos2; | |
74051ba5 | 932 | unsigned long max_state; |
9a3031dc | 933 | int result, ret; |
203d3d4a | 934 | |
543a9561 | 935 | if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE)) |
203d3d4a ZR |
936 | return -EINVAL; |
937 | ||
c7516709 TS |
938 | list_for_each_entry(pos1, &thermal_tz_list, node) { |
939 | if (pos1 == tz) | |
940 | break; | |
941 | } | |
942 | list_for_each_entry(pos2, &thermal_cdev_list, node) { | |
943 | if (pos2 == cdev) | |
944 | break; | |
945 | } | |
946 | ||
947 | if (tz != pos1 || cdev != pos2) | |
203d3d4a ZR |
948 | return -EINVAL; |
949 | ||
9a3031dc LM |
950 | ret = cdev->ops->get_max_state(cdev, &max_state); |
951 | if (ret) | |
952 | return ret; | |
9d99842f ZR |
953 | |
954 | /* lower default 0, upper default max_state */ | |
955 | lower = lower == THERMAL_NO_LIMIT ? 0 : lower; | |
956 | upper = upper == THERMAL_NO_LIMIT ? max_state : upper; | |
957 | ||
958 | if (lower > upper || upper > max_state) | |
959 | return -EINVAL; | |
960 | ||
203d3d4a | 961 | dev = |
b81b6ba3 | 962 | kzalloc(sizeof(struct thermal_instance), GFP_KERNEL); |
203d3d4a ZR |
963 | if (!dev) |
964 | return -ENOMEM; | |
965 | dev->tz = tz; | |
966 | dev->cdev = cdev; | |
967 | dev->trip = trip; | |
9d99842f ZR |
968 | dev->upper = upper; |
969 | dev->lower = lower; | |
ce119f83 | 970 | dev->target = THERMAL_NO_TARGET; |
74051ba5 | 971 | |
203d3d4a ZR |
972 | result = get_idr(&tz->idr, &tz->lock, &dev->id); |
973 | if (result) | |
974 | goto free_mem; | |
975 | ||
976 | sprintf(dev->name, "cdev%d", dev->id); | |
977 | result = | |
978 | sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev->name); | |
979 | if (result) | |
980 | goto release_idr; | |
981 | ||
982 | sprintf(dev->attr_name, "cdev%d_trip_point", dev->id); | |
975f8c56 | 983 | sysfs_attr_init(&dev->attr.attr); |
203d3d4a ZR |
984 | dev->attr.attr.name = dev->attr_name; |
985 | dev->attr.attr.mode = 0444; | |
986 | dev->attr.show = thermal_cooling_device_trip_point_show; | |
987 | result = device_create_file(&tz->device, &dev->attr); | |
988 | if (result) | |
989 | goto remove_symbol_link; | |
990 | ||
991 | mutex_lock(&tz->lock); | |
f4a821ce | 992 | mutex_lock(&cdev->lock); |
cddf31b3 | 993 | list_for_each_entry(pos, &tz->thermal_instances, tz_node) |
203d3d4a ZR |
994 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
995 | result = -EEXIST; | |
996 | break; | |
997 | } | |
b5e4ae62 | 998 | if (!result) { |
cddf31b3 | 999 | list_add_tail(&dev->tz_node, &tz->thermal_instances); |
b5e4ae62 ZR |
1000 | list_add_tail(&dev->cdev_node, &cdev->thermal_instances); |
1001 | } | |
f4a821ce | 1002 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
1003 | mutex_unlock(&tz->lock); |
1004 | ||
1005 | if (!result) | |
1006 | return 0; | |
1007 | ||
1008 | device_remove_file(&tz->device, &dev->attr); | |
caca8b80 | 1009 | remove_symbol_link: |
203d3d4a | 1010 | sysfs_remove_link(&tz->device.kobj, dev->name); |
caca8b80 | 1011 | release_idr: |
203d3d4a | 1012 | release_idr(&tz->idr, &tz->lock, dev->id); |
caca8b80 | 1013 | free_mem: |
203d3d4a ZR |
1014 | kfree(dev); |
1015 | return result; | |
1016 | } | |
910cb1e3 | 1017 | EXPORT_SYMBOL_GPL(thermal_zone_bind_cooling_device); |
203d3d4a ZR |
1018 | |
1019 | /** | |
9892e5dc EV |
1020 | * thermal_zone_unbind_cooling_device() - unbind a cooling device from a |
1021 | * thermal zone. | |
1022 | * @tz: pointer to a struct thermal_zone_device. | |
203d3d4a ZR |
1023 | * @trip: indicates which trip point the cooling devices is |
1024 | * associated with in this thermal zone. | |
9892e5dc | 1025 | * @cdev: pointer to a struct thermal_cooling_device. |
543a9561 | 1026 | * |
9892e5dc EV |
1027 | * This interface function unbind a thermal cooling device from the certain |
1028 | * trip point of a thermal zone device. | |
543a9561 | 1029 | * This function is usually called in the thermal zone device .unbind callback. |
9892e5dc EV |
1030 | * |
1031 | * Return: 0 on success, the proper error value otherwise. | |
203d3d4a ZR |
1032 | */ |
1033 | int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz, | |
1034 | int trip, | |
1035 | struct thermal_cooling_device *cdev) | |
1036 | { | |
b81b6ba3 | 1037 | struct thermal_instance *pos, *next; |
203d3d4a ZR |
1038 | |
1039 | mutex_lock(&tz->lock); | |
f4a821ce | 1040 | mutex_lock(&cdev->lock); |
cddf31b3 | 1041 | list_for_each_entry_safe(pos, next, &tz->thermal_instances, tz_node) { |
543a9561 | 1042 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
cddf31b3 | 1043 | list_del(&pos->tz_node); |
b5e4ae62 | 1044 | list_del(&pos->cdev_node); |
f4a821ce | 1045 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
1046 | mutex_unlock(&tz->lock); |
1047 | goto unbind; | |
1048 | } | |
1049 | } | |
f4a821ce | 1050 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
1051 | mutex_unlock(&tz->lock); |
1052 | ||
1053 | return -ENODEV; | |
1054 | ||
caca8b80 | 1055 | unbind: |
203d3d4a ZR |
1056 | device_remove_file(&tz->device, &pos->attr); |
1057 | sysfs_remove_link(&tz->device.kobj, pos->name); | |
1058 | release_idr(&tz->idr, &tz->lock, pos->id); | |
1059 | kfree(pos); | |
1060 | return 0; | |
1061 | } | |
910cb1e3 | 1062 | EXPORT_SYMBOL_GPL(thermal_zone_unbind_cooling_device); |
203d3d4a ZR |
1063 | |
1064 | static void thermal_release(struct device *dev) | |
1065 | { | |
1066 | struct thermal_zone_device *tz; | |
1067 | struct thermal_cooling_device *cdev; | |
1068 | ||
caca8b80 JP |
1069 | if (!strncmp(dev_name(dev), "thermal_zone", |
1070 | sizeof("thermal_zone") - 1)) { | |
203d3d4a ZR |
1071 | tz = to_thermal_zone(dev); |
1072 | kfree(tz); | |
732e4c8d | 1073 | } else if(!strncmp(dev_name(dev), "cooling_device", |
1074 | sizeof("cooling_device") - 1)){ | |
203d3d4a ZR |
1075 | cdev = to_cooling_device(dev); |
1076 | kfree(cdev); | |
1077 | } | |
1078 | } | |
1079 | ||
1080 | static struct class thermal_class = { | |
1081 | .name = "thermal", | |
1082 | .dev_release = thermal_release, | |
1083 | }; | |
1084 | ||
1085 | /** | |
a116b5d4 EV |
1086 | * __thermal_cooling_device_register() - register a new thermal cooling device |
1087 | * @np: a pointer to a device tree node. | |
203d3d4a ZR |
1088 | * @type: the thermal cooling device type. |
1089 | * @devdata: device private data. | |
1090 | * @ops: standard thermal cooling devices callbacks. | |
3a6eccb3 EV |
1091 | * |
1092 | * This interface function adds a new thermal cooling device (fan/processor/...) | |
1093 | * to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself | |
1094 | * to all the thermal zone devices registered at the same time. | |
a116b5d4 EV |
1095 | * It also gives the opportunity to link the cooling device to a device tree |
1096 | * node, so that it can be bound to a thermal zone created out of device tree. | |
3a6eccb3 EV |
1097 | * |
1098 | * Return: a pointer to the created struct thermal_cooling_device or an | |
1099 | * ERR_PTR. Caller must check return value with IS_ERR*() helpers. | |
203d3d4a | 1100 | */ |
a116b5d4 EV |
1101 | static struct thermal_cooling_device * |
1102 | __thermal_cooling_device_register(struct device_node *np, | |
1103 | char *type, void *devdata, | |
1104 | const struct thermal_cooling_device_ops *ops) | |
203d3d4a ZR |
1105 | { |
1106 | struct thermal_cooling_device *cdev; | |
203d3d4a ZR |
1107 | int result; |
1108 | ||
204dd1d3 | 1109 | if (type && strlen(type) >= THERMAL_NAME_LENGTH) |
3e6fda5c | 1110 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1111 | |
1112 | if (!ops || !ops->get_max_state || !ops->get_cur_state || | |
543a9561 | 1113 | !ops->set_cur_state) |
3e6fda5c | 1114 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1115 | |
1116 | cdev = kzalloc(sizeof(struct thermal_cooling_device), GFP_KERNEL); | |
1117 | if (!cdev) | |
3e6fda5c | 1118 | return ERR_PTR(-ENOMEM); |
203d3d4a ZR |
1119 | |
1120 | result = get_idr(&thermal_cdev_idr, &thermal_idr_lock, &cdev->id); | |
1121 | if (result) { | |
1122 | kfree(cdev); | |
3e6fda5c | 1123 | return ERR_PTR(result); |
203d3d4a ZR |
1124 | } |
1125 | ||
c7a8b9d9 | 1126 | strlcpy(cdev->type, type ? : "", sizeof(cdev->type)); |
f4a821ce | 1127 | mutex_init(&cdev->lock); |
b5e4ae62 | 1128 | INIT_LIST_HEAD(&cdev->thermal_instances); |
a116b5d4 | 1129 | cdev->np = np; |
203d3d4a | 1130 | cdev->ops = ops; |
5ca0cce5 | 1131 | cdev->updated = false; |
203d3d4a ZR |
1132 | cdev->device.class = &thermal_class; |
1133 | cdev->devdata = devdata; | |
354655ea | 1134 | dev_set_name(&cdev->device, "cooling_device%d", cdev->id); |
203d3d4a ZR |
1135 | result = device_register(&cdev->device); |
1136 | if (result) { | |
1137 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
1138 | kfree(cdev); | |
3e6fda5c | 1139 | return ERR_PTR(result); |
203d3d4a ZR |
1140 | } |
1141 | ||
1142 | /* sys I/F */ | |
1143 | if (type) { | |
543a9561 | 1144 | result = device_create_file(&cdev->device, &dev_attr_cdev_type); |
203d3d4a ZR |
1145 | if (result) |
1146 | goto unregister; | |
1147 | } | |
1148 | ||
1149 | result = device_create_file(&cdev->device, &dev_attr_max_state); | |
1150 | if (result) | |
1151 | goto unregister; | |
1152 | ||
1153 | result = device_create_file(&cdev->device, &dev_attr_cur_state); | |
1154 | if (result) | |
1155 | goto unregister; | |
1156 | ||
7e8ee1e9 | 1157 | /* Add 'this' new cdev to the global cdev list */ |
203d3d4a ZR |
1158 | mutex_lock(&thermal_list_lock); |
1159 | list_add(&cdev->node, &thermal_cdev_list); | |
203d3d4a ZR |
1160 | mutex_unlock(&thermal_list_lock); |
1161 | ||
7e8ee1e9 D |
1162 | /* Update binding information for 'this' new cdev */ |
1163 | bind_cdev(cdev); | |
1164 | ||
1165 | return cdev; | |
203d3d4a | 1166 | |
caca8b80 | 1167 | unregister: |
203d3d4a ZR |
1168 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); |
1169 | device_unregister(&cdev->device); | |
3e6fda5c | 1170 | return ERR_PTR(result); |
203d3d4a | 1171 | } |
a116b5d4 EV |
1172 | |
1173 | /** | |
1174 | * thermal_cooling_device_register() - register a new thermal cooling device | |
1175 | * @type: the thermal cooling device type. | |
1176 | * @devdata: device private data. | |
1177 | * @ops: standard thermal cooling devices callbacks. | |
1178 | * | |
1179 | * This interface function adds a new thermal cooling device (fan/processor/...) | |
1180 | * to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself | |
1181 | * to all the thermal zone devices registered at the same time. | |
1182 | * | |
1183 | * Return: a pointer to the created struct thermal_cooling_device or an | |
1184 | * ERR_PTR. Caller must check return value with IS_ERR*() helpers. | |
1185 | */ | |
1186 | struct thermal_cooling_device * | |
1187 | thermal_cooling_device_register(char *type, void *devdata, | |
1188 | const struct thermal_cooling_device_ops *ops) | |
1189 | { | |
1190 | return __thermal_cooling_device_register(NULL, type, devdata, ops); | |
1191 | } | |
910cb1e3 | 1192 | EXPORT_SYMBOL_GPL(thermal_cooling_device_register); |
203d3d4a | 1193 | |
a116b5d4 EV |
1194 | /** |
1195 | * thermal_of_cooling_device_register() - register an OF thermal cooling device | |
1196 | * @np: a pointer to a device tree node. | |
1197 | * @type: the thermal cooling device type. | |
1198 | * @devdata: device private data. | |
1199 | * @ops: standard thermal cooling devices callbacks. | |
1200 | * | |
1201 | * This function will register a cooling device with device tree node reference. | |
1202 | * This interface function adds a new thermal cooling device (fan/processor/...) | |
1203 | * to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself | |
1204 | * to all the thermal zone devices registered at the same time. | |
1205 | * | |
1206 | * Return: a pointer to the created struct thermal_cooling_device or an | |
1207 | * ERR_PTR. Caller must check return value with IS_ERR*() helpers. | |
1208 | */ | |
1209 | struct thermal_cooling_device * | |
1210 | thermal_of_cooling_device_register(struct device_node *np, | |
1211 | char *type, void *devdata, | |
1212 | const struct thermal_cooling_device_ops *ops) | |
1213 | { | |
1214 | return __thermal_cooling_device_register(np, type, devdata, ops); | |
1215 | } | |
1216 | EXPORT_SYMBOL_GPL(thermal_of_cooling_device_register); | |
1217 | ||
203d3d4a ZR |
1218 | /** |
1219 | * thermal_cooling_device_unregister - removes the registered thermal cooling device | |
203d3d4a ZR |
1220 | * @cdev: the thermal cooling device to remove. |
1221 | * | |
1222 | * thermal_cooling_device_unregister() must be called when the device is no | |
1223 | * longer needed. | |
1224 | */ | |
7e8ee1e9 | 1225 | void thermal_cooling_device_unregister(struct thermal_cooling_device *cdev) |
203d3d4a | 1226 | { |
7e8ee1e9 D |
1227 | int i; |
1228 | const struct thermal_zone_params *tzp; | |
203d3d4a ZR |
1229 | struct thermal_zone_device *tz; |
1230 | struct thermal_cooling_device *pos = NULL; | |
1231 | ||
1232 | if (!cdev) | |
1233 | return; | |
1234 | ||
1235 | mutex_lock(&thermal_list_lock); | |
1236 | list_for_each_entry(pos, &thermal_cdev_list, node) | |
1237 | if (pos == cdev) | |
1238 | break; | |
1239 | if (pos != cdev) { | |
1240 | /* thermal cooling device not found */ | |
1241 | mutex_unlock(&thermal_list_lock); | |
1242 | return; | |
1243 | } | |
1244 | list_del(&cdev->node); | |
7e8ee1e9 D |
1245 | |
1246 | /* Unbind all thermal zones associated with 'this' cdev */ | |
203d3d4a | 1247 | list_for_each_entry(tz, &thermal_tz_list, node) { |
7e8ee1e9 D |
1248 | if (tz->ops->unbind) { |
1249 | tz->ops->unbind(tz, cdev); | |
1250 | continue; | |
1251 | } | |
1252 | ||
1253 | if (!tz->tzp || !tz->tzp->tbp) | |
203d3d4a | 1254 | continue; |
7e8ee1e9 D |
1255 | |
1256 | tzp = tz->tzp; | |
1257 | for (i = 0; i < tzp->num_tbps; i++) { | |
1258 | if (tzp->tbp[i].cdev == cdev) { | |
1259 | __unbind(tz, tzp->tbp[i].trip_mask, cdev); | |
1260 | tzp->tbp[i].cdev = NULL; | |
1261 | } | |
1262 | } | |
203d3d4a | 1263 | } |
7e8ee1e9 | 1264 | |
203d3d4a | 1265 | mutex_unlock(&thermal_list_lock); |
7e8ee1e9 | 1266 | |
203d3d4a | 1267 | if (cdev->type[0]) |
543a9561 | 1268 | device_remove_file(&cdev->device, &dev_attr_cdev_type); |
203d3d4a ZR |
1269 | device_remove_file(&cdev->device, &dev_attr_max_state); |
1270 | device_remove_file(&cdev->device, &dev_attr_cur_state); | |
1271 | ||
1272 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
1273 | device_unregister(&cdev->device); | |
1274 | return; | |
1275 | } | |
910cb1e3 | 1276 | EXPORT_SYMBOL_GPL(thermal_cooling_device_unregister); |
203d3d4a | 1277 | |
dc765482 | 1278 | void thermal_cdev_update(struct thermal_cooling_device *cdev) |
ce119f83 ZR |
1279 | { |
1280 | struct thermal_instance *instance; | |
1281 | unsigned long target = 0; | |
1282 | ||
1283 | /* cooling device is updated*/ | |
1284 | if (cdev->updated) | |
1285 | return; | |
1286 | ||
f4a821ce | 1287 | mutex_lock(&cdev->lock); |
ce119f83 ZR |
1288 | /* Make sure cdev enters the deepest cooling state */ |
1289 | list_for_each_entry(instance, &cdev->thermal_instances, cdev_node) { | |
06475b55 AL |
1290 | dev_dbg(&cdev->device, "zone%d->target=%lu\n", |
1291 | instance->tz->id, instance->target); | |
ce119f83 ZR |
1292 | if (instance->target == THERMAL_NO_TARGET) |
1293 | continue; | |
1294 | if (instance->target > target) | |
1295 | target = instance->target; | |
1296 | } | |
f4a821ce | 1297 | mutex_unlock(&cdev->lock); |
ce119f83 ZR |
1298 | cdev->ops->set_cur_state(cdev, target); |
1299 | cdev->updated = true; | |
39811569 | 1300 | trace_cdev_update(cdev, target); |
06475b55 | 1301 | dev_dbg(&cdev->device, "set to state %lu\n", target); |
ce119f83 | 1302 | } |
dc765482 | 1303 | EXPORT_SYMBOL(thermal_cdev_update); |
ce119f83 | 1304 | |
f2b4caaf | 1305 | /** |
7b73c993 | 1306 | * thermal_notify_framework - Sensor drivers use this API to notify framework |
f2b4caaf D |
1307 | * @tz: thermal zone device |
1308 | * @trip: indicates which trip point has been crossed | |
1309 | * | |
1310 | * This function handles the trip events from sensor drivers. It starts | |
1311 | * throttling the cooling devices according to the policy configured. | |
1312 | * For CRITICAL and HOT trip points, this notifies the respective drivers, | |
1313 | * and does actual throttling for other trip points i.e ACTIVE and PASSIVE. | |
1314 | * The throttling policy is based on the configured platform data; if no | |
1315 | * platform data is provided, this uses the step_wise throttling policy. | |
1316 | */ | |
7b73c993 | 1317 | void thermal_notify_framework(struct thermal_zone_device *tz, int trip) |
f2b4caaf D |
1318 | { |
1319 | handle_thermal_trip(tz, trip); | |
1320 | } | |
910cb1e3 | 1321 | EXPORT_SYMBOL_GPL(thermal_notify_framework); |
f2b4caaf | 1322 | |
c56f5c03 | 1323 | /** |
269c174f | 1324 | * create_trip_attrs() - create attributes for trip points |
c56f5c03 D |
1325 | * @tz: the thermal zone device |
1326 | * @mask: Writeable trip point bitmap. | |
269c174f EV |
1327 | * |
1328 | * helper function to instantiate sysfs entries for every trip | |
1329 | * point and its properties of a struct thermal_zone_device. | |
1330 | * | |
1331 | * Return: 0 on success, the proper error value otherwise. | |
c56f5c03 D |
1332 | */ |
1333 | static int create_trip_attrs(struct thermal_zone_device *tz, int mask) | |
1334 | { | |
1335 | int indx; | |
27365a6c | 1336 | int size = sizeof(struct thermal_attr) * tz->trips; |
c56f5c03 | 1337 | |
27365a6c | 1338 | tz->trip_type_attrs = kzalloc(size, GFP_KERNEL); |
c56f5c03 D |
1339 | if (!tz->trip_type_attrs) |
1340 | return -ENOMEM; | |
1341 | ||
27365a6c | 1342 | tz->trip_temp_attrs = kzalloc(size, GFP_KERNEL); |
c56f5c03 D |
1343 | if (!tz->trip_temp_attrs) { |
1344 | kfree(tz->trip_type_attrs); | |
1345 | return -ENOMEM; | |
1346 | } | |
1347 | ||
27365a6c D |
1348 | if (tz->ops->get_trip_hyst) { |
1349 | tz->trip_hyst_attrs = kzalloc(size, GFP_KERNEL); | |
1350 | if (!tz->trip_hyst_attrs) { | |
1351 | kfree(tz->trip_type_attrs); | |
1352 | kfree(tz->trip_temp_attrs); | |
1353 | return -ENOMEM; | |
1354 | } | |
1355 | } | |
c56f5c03 | 1356 | |
27365a6c D |
1357 | |
1358 | for (indx = 0; indx < tz->trips; indx++) { | |
c56f5c03 D |
1359 | /* create trip type attribute */ |
1360 | snprintf(tz->trip_type_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1361 | "trip_point_%d_type", indx); | |
1362 | ||
1363 | sysfs_attr_init(&tz->trip_type_attrs[indx].attr.attr); | |
1364 | tz->trip_type_attrs[indx].attr.attr.name = | |
1365 | tz->trip_type_attrs[indx].name; | |
1366 | tz->trip_type_attrs[indx].attr.attr.mode = S_IRUGO; | |
1367 | tz->trip_type_attrs[indx].attr.show = trip_point_type_show; | |
1368 | ||
1369 | device_create_file(&tz->device, | |
1370 | &tz->trip_type_attrs[indx].attr); | |
1371 | ||
1372 | /* create trip temp attribute */ | |
1373 | snprintf(tz->trip_temp_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1374 | "trip_point_%d_temp", indx); | |
1375 | ||
1376 | sysfs_attr_init(&tz->trip_temp_attrs[indx].attr.attr); | |
1377 | tz->trip_temp_attrs[indx].attr.attr.name = | |
1378 | tz->trip_temp_attrs[indx].name; | |
1379 | tz->trip_temp_attrs[indx].attr.attr.mode = S_IRUGO; | |
1380 | tz->trip_temp_attrs[indx].attr.show = trip_point_temp_show; | |
1381 | if (mask & (1 << indx)) { | |
1382 | tz->trip_temp_attrs[indx].attr.attr.mode |= S_IWUSR; | |
1383 | tz->trip_temp_attrs[indx].attr.store = | |
1384 | trip_point_temp_store; | |
1385 | } | |
1386 | ||
1387 | device_create_file(&tz->device, | |
1388 | &tz->trip_temp_attrs[indx].attr); | |
27365a6c D |
1389 | |
1390 | /* create Optional trip hyst attribute */ | |
1391 | if (!tz->ops->get_trip_hyst) | |
1392 | continue; | |
1393 | snprintf(tz->trip_hyst_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1394 | "trip_point_%d_hyst", indx); | |
1395 | ||
1396 | sysfs_attr_init(&tz->trip_hyst_attrs[indx].attr.attr); | |
1397 | tz->trip_hyst_attrs[indx].attr.attr.name = | |
1398 | tz->trip_hyst_attrs[indx].name; | |
1399 | tz->trip_hyst_attrs[indx].attr.attr.mode = S_IRUGO; | |
1400 | tz->trip_hyst_attrs[indx].attr.show = trip_point_hyst_show; | |
1401 | if (tz->ops->set_trip_hyst) { | |
1402 | tz->trip_hyst_attrs[indx].attr.attr.mode |= S_IWUSR; | |
1403 | tz->trip_hyst_attrs[indx].attr.store = | |
1404 | trip_point_hyst_store; | |
1405 | } | |
1406 | ||
1407 | device_create_file(&tz->device, | |
1408 | &tz->trip_hyst_attrs[indx].attr); | |
c56f5c03 D |
1409 | } |
1410 | return 0; | |
1411 | } | |
1412 | ||
1413 | static void remove_trip_attrs(struct thermal_zone_device *tz) | |
1414 | { | |
1415 | int indx; | |
1416 | ||
1417 | for (indx = 0; indx < tz->trips; indx++) { | |
1418 | device_remove_file(&tz->device, | |
1419 | &tz->trip_type_attrs[indx].attr); | |
1420 | device_remove_file(&tz->device, | |
1421 | &tz->trip_temp_attrs[indx].attr); | |
27365a6c D |
1422 | if (tz->ops->get_trip_hyst) |
1423 | device_remove_file(&tz->device, | |
1424 | &tz->trip_hyst_attrs[indx].attr); | |
c56f5c03 D |
1425 | } |
1426 | kfree(tz->trip_type_attrs); | |
1427 | kfree(tz->trip_temp_attrs); | |
27365a6c | 1428 | kfree(tz->trip_hyst_attrs); |
c56f5c03 D |
1429 | } |
1430 | ||
203d3d4a | 1431 | /** |
a00e55f9 | 1432 | * thermal_zone_device_register() - register a new thermal zone device |
203d3d4a ZR |
1433 | * @type: the thermal zone device type |
1434 | * @trips: the number of trip points the thermal zone support | |
c56f5c03 | 1435 | * @mask: a bit string indicating the writeablility of trip points |
203d3d4a ZR |
1436 | * @devdata: private device data |
1437 | * @ops: standard thermal zone device callbacks | |
50125a9b | 1438 | * @tzp: thermal zone platform parameters |
b1569e99 MG |
1439 | * @passive_delay: number of milliseconds to wait between polls when |
1440 | * performing passive cooling | |
1441 | * @polling_delay: number of milliseconds to wait between polls when checking | |
1442 | * whether trip points have been crossed (0 for interrupt | |
1443 | * driven systems) | |
203d3d4a | 1444 | * |
a00e55f9 EV |
1445 | * This interface function adds a new thermal zone device (sensor) to |
1446 | * /sys/class/thermal folder as thermal_zone[0-*]. It tries to bind all the | |
1447 | * thermal cooling devices registered at the same time. | |
203d3d4a | 1448 | * thermal_zone_device_unregister() must be called when the device is no |
1b7ddb84 | 1449 | * longer needed. The passive cooling depends on the .get_trend() return value. |
a00e55f9 EV |
1450 | * |
1451 | * Return: a pointer to the created struct thermal_zone_device or an | |
1452 | * in case of error, an ERR_PTR. Caller must check return value with | |
1453 | * IS_ERR*() helpers. | |
203d3d4a | 1454 | */ |
4b1bf587 | 1455 | struct thermal_zone_device *thermal_zone_device_register(const char *type, |
c56f5c03 | 1456 | int trips, int mask, void *devdata, |
4e5e4705 | 1457 | struct thermal_zone_device_ops *ops, |
50125a9b | 1458 | const struct thermal_zone_params *tzp, |
1b7ddb84 | 1459 | int passive_delay, int polling_delay) |
203d3d4a ZR |
1460 | { |
1461 | struct thermal_zone_device *tz; | |
03a971a2 | 1462 | enum thermal_trip_type trip_type; |
203d3d4a ZR |
1463 | int result; |
1464 | int count; | |
03a971a2 | 1465 | int passive = 0; |
203d3d4a | 1466 | |
204dd1d3 | 1467 | if (type && strlen(type) >= THERMAL_NAME_LENGTH) |
3e6fda5c | 1468 | return ERR_PTR(-EINVAL); |
203d3d4a | 1469 | |
c56f5c03 | 1470 | if (trips > THERMAL_MAX_TRIPS || trips < 0 || mask >> trips) |
3e6fda5c | 1471 | return ERR_PTR(-EINVAL); |
203d3d4a | 1472 | |
81bd4e1c | 1473 | if (!ops) |
3e6fda5c | 1474 | return ERR_PTR(-EINVAL); |
203d3d4a | 1475 | |
83720d0b | 1476 | if (trips > 0 && (!ops->get_trip_type || !ops->get_trip_temp)) |
6b2aa51d EV |
1477 | return ERR_PTR(-EINVAL); |
1478 | ||
203d3d4a ZR |
1479 | tz = kzalloc(sizeof(struct thermal_zone_device), GFP_KERNEL); |
1480 | if (!tz) | |
3e6fda5c | 1481 | return ERR_PTR(-ENOMEM); |
203d3d4a | 1482 | |
2d374139 | 1483 | INIT_LIST_HEAD(&tz->thermal_instances); |
203d3d4a ZR |
1484 | idr_init(&tz->idr); |
1485 | mutex_init(&tz->lock); | |
1486 | result = get_idr(&thermal_tz_idr, &thermal_idr_lock, &tz->id); | |
1487 | if (result) { | |
1488 | kfree(tz); | |
3e6fda5c | 1489 | return ERR_PTR(result); |
203d3d4a ZR |
1490 | } |
1491 | ||
c7a8b9d9 | 1492 | strlcpy(tz->type, type ? : "", sizeof(tz->type)); |
203d3d4a | 1493 | tz->ops = ops; |
50125a9b | 1494 | tz->tzp = tzp; |
203d3d4a ZR |
1495 | tz->device.class = &thermal_class; |
1496 | tz->devdata = devdata; | |
1497 | tz->trips = trips; | |
b1569e99 MG |
1498 | tz->passive_delay = passive_delay; |
1499 | tz->polling_delay = polling_delay; | |
1500 | ||
354655ea | 1501 | dev_set_name(&tz->device, "thermal_zone%d", tz->id); |
203d3d4a ZR |
1502 | result = device_register(&tz->device); |
1503 | if (result) { | |
1504 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); | |
1505 | kfree(tz); | |
3e6fda5c | 1506 | return ERR_PTR(result); |
203d3d4a ZR |
1507 | } |
1508 | ||
1509 | /* sys I/F */ | |
1510 | if (type) { | |
1511 | result = device_create_file(&tz->device, &dev_attr_type); | |
1512 | if (result) | |
1513 | goto unregister; | |
1514 | } | |
1515 | ||
1516 | result = device_create_file(&tz->device, &dev_attr_temp); | |
1517 | if (result) | |
1518 | goto unregister; | |
1519 | ||
1520 | if (ops->get_mode) { | |
1521 | result = device_create_file(&tz->device, &dev_attr_mode); | |
1522 | if (result) | |
1523 | goto unregister; | |
1524 | } | |
1525 | ||
c56f5c03 D |
1526 | result = create_trip_attrs(tz, mask); |
1527 | if (result) | |
1528 | goto unregister; | |
1529 | ||
203d3d4a | 1530 | for (count = 0; count < trips; count++) { |
03a971a2 MG |
1531 | tz->ops->get_trip_type(tz, count, &trip_type); |
1532 | if (trip_type == THERMAL_TRIP_PASSIVE) | |
1533 | passive = 1; | |
203d3d4a ZR |
1534 | } |
1535 | ||
5a2c090b D |
1536 | if (!passive) { |
1537 | result = device_create_file(&tz->device, &dev_attr_passive); | |
1538 | if (result) | |
1539 | goto unregister; | |
1540 | } | |
03a971a2 | 1541 | |
e6e238c3 ADK |
1542 | #ifdef CONFIG_THERMAL_EMULATION |
1543 | result = device_create_file(&tz->device, &dev_attr_emul_temp); | |
1544 | if (result) | |
1545 | goto unregister; | |
1546 | #endif | |
5a2c090b D |
1547 | /* Create policy attribute */ |
1548 | result = device_create_file(&tz->device, &dev_attr_policy); | |
03a971a2 MG |
1549 | if (result) |
1550 | goto unregister; | |
1551 | ||
a4a15485 D |
1552 | /* Update 'this' zone's governor information */ |
1553 | mutex_lock(&thermal_governor_lock); | |
1554 | ||
1555 | if (tz->tzp) | |
1556 | tz->governor = __find_governor(tz->tzp->governor_name); | |
1557 | else | |
f2234bcd | 1558 | tz->governor = def_governor; |
a4a15485 D |
1559 | |
1560 | mutex_unlock(&thermal_governor_lock); | |
1561 | ||
ccba4ffd EV |
1562 | if (!tz->tzp || !tz->tzp->no_hwmon) { |
1563 | result = thermal_add_hwmon_sysfs(tz); | |
1564 | if (result) | |
1565 | goto unregister; | |
1566 | } | |
e68b16ab | 1567 | |
203d3d4a ZR |
1568 | mutex_lock(&thermal_list_lock); |
1569 | list_add_tail(&tz->node, &thermal_tz_list); | |
203d3d4a ZR |
1570 | mutex_unlock(&thermal_list_lock); |
1571 | ||
7e8ee1e9 D |
1572 | /* Bind cooling devices for this zone */ |
1573 | bind_tz(tz); | |
1574 | ||
b1569e99 MG |
1575 | INIT_DELAYED_WORK(&(tz->poll_queue), thermal_zone_device_check); |
1576 | ||
81bd4e1c EV |
1577 | if (!tz->ops->get_temp) |
1578 | thermal_zone_device_set_polling(tz, 0); | |
1579 | ||
b1569e99 MG |
1580 | thermal_zone_device_update(tz); |
1581 | ||
14015860 | 1582 | return tz; |
203d3d4a | 1583 | |
caca8b80 | 1584 | unregister: |
203d3d4a ZR |
1585 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1586 | device_unregister(&tz->device); | |
3e6fda5c | 1587 | return ERR_PTR(result); |
203d3d4a | 1588 | } |
910cb1e3 | 1589 | EXPORT_SYMBOL_GPL(thermal_zone_device_register); |
203d3d4a ZR |
1590 | |
1591 | /** | |
1592 | * thermal_device_unregister - removes the registered thermal zone device | |
203d3d4a ZR |
1593 | * @tz: the thermal zone device to remove |
1594 | */ | |
1595 | void thermal_zone_device_unregister(struct thermal_zone_device *tz) | |
1596 | { | |
7e8ee1e9 D |
1597 | int i; |
1598 | const struct thermal_zone_params *tzp; | |
203d3d4a ZR |
1599 | struct thermal_cooling_device *cdev; |
1600 | struct thermal_zone_device *pos = NULL; | |
203d3d4a ZR |
1601 | |
1602 | if (!tz) | |
1603 | return; | |
1604 | ||
7e8ee1e9 D |
1605 | tzp = tz->tzp; |
1606 | ||
203d3d4a ZR |
1607 | mutex_lock(&thermal_list_lock); |
1608 | list_for_each_entry(pos, &thermal_tz_list, node) | |
1609 | if (pos == tz) | |
1610 | break; | |
1611 | if (pos != tz) { | |
1612 | /* thermal zone device not found */ | |
1613 | mutex_unlock(&thermal_list_lock); | |
1614 | return; | |
1615 | } | |
1616 | list_del(&tz->node); | |
7e8ee1e9 D |
1617 | |
1618 | /* Unbind all cdevs associated with 'this' thermal zone */ | |
1619 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
1620 | if (tz->ops->unbind) { | |
1621 | tz->ops->unbind(tz, cdev); | |
1622 | continue; | |
1623 | } | |
1624 | ||
1625 | if (!tzp || !tzp->tbp) | |
1626 | break; | |
1627 | ||
1628 | for (i = 0; i < tzp->num_tbps; i++) { | |
1629 | if (tzp->tbp[i].cdev == cdev) { | |
1630 | __unbind(tz, tzp->tbp[i].trip_mask, cdev); | |
1631 | tzp->tbp[i].cdev = NULL; | |
1632 | } | |
1633 | } | |
1634 | } | |
1635 | ||
203d3d4a ZR |
1636 | mutex_unlock(&thermal_list_lock); |
1637 | ||
b1569e99 MG |
1638 | thermal_zone_device_set_polling(tz, 0); |
1639 | ||
203d3d4a ZR |
1640 | if (tz->type[0]) |
1641 | device_remove_file(&tz->device, &dev_attr_type); | |
1642 | device_remove_file(&tz->device, &dev_attr_temp); | |
1643 | if (tz->ops->get_mode) | |
1644 | device_remove_file(&tz->device, &dev_attr_mode); | |
5a2c090b | 1645 | device_remove_file(&tz->device, &dev_attr_policy); |
c56f5c03 | 1646 | remove_trip_attrs(tz); |
a4a15485 | 1647 | tz->governor = NULL; |
203d3d4a | 1648 | |
e68b16ab | 1649 | thermal_remove_hwmon_sysfs(tz); |
203d3d4a ZR |
1650 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1651 | idr_destroy(&tz->idr); | |
1652 | mutex_destroy(&tz->lock); | |
1653 | device_unregister(&tz->device); | |
1654 | return; | |
1655 | } | |
910cb1e3 | 1656 | EXPORT_SYMBOL_GPL(thermal_zone_device_unregister); |
203d3d4a | 1657 | |
63c4d919 EV |
1658 | /** |
1659 | * thermal_zone_get_zone_by_name() - search for a zone and returns its ref | |
1660 | * @name: thermal zone name to fetch the temperature | |
1661 | * | |
1662 | * When only one zone is found with the passed name, returns a reference to it. | |
1663 | * | |
1664 | * Return: On success returns a reference to an unique thermal zone with | |
1665 | * matching name equals to @name, an ERR_PTR otherwise (-EINVAL for invalid | |
1666 | * paramenters, -ENODEV for not found and -EEXIST for multiple matches). | |
1667 | */ | |
1668 | struct thermal_zone_device *thermal_zone_get_zone_by_name(const char *name) | |
1669 | { | |
1670 | struct thermal_zone_device *pos = NULL, *ref = ERR_PTR(-EINVAL); | |
1671 | unsigned int found = 0; | |
1672 | ||
1673 | if (!name) | |
1674 | goto exit; | |
1675 | ||
1676 | mutex_lock(&thermal_list_lock); | |
1677 | list_for_each_entry(pos, &thermal_tz_list, node) | |
484ac2f3 | 1678 | if (!strncasecmp(name, pos->type, THERMAL_NAME_LENGTH)) { |
63c4d919 EV |
1679 | found++; |
1680 | ref = pos; | |
1681 | } | |
1682 | mutex_unlock(&thermal_list_lock); | |
1683 | ||
1684 | /* nothing has been found, thus an error code for it */ | |
1685 | if (found == 0) | |
1686 | ref = ERR_PTR(-ENODEV); | |
1687 | else if (found > 1) | |
1688 | /* Success only when an unique zone is found */ | |
1689 | ref = ERR_PTR(-EEXIST); | |
1690 | ||
1691 | exit: | |
1692 | return ref; | |
1693 | } | |
1694 | EXPORT_SYMBOL_GPL(thermal_zone_get_zone_by_name); | |
1695 | ||
af06216a | 1696 | #ifdef CONFIG_NET |
2a94fe48 JB |
1697 | static const struct genl_multicast_group thermal_event_mcgrps[] = { |
1698 | { .name = THERMAL_GENL_MCAST_GROUP_NAME, }, | |
1699 | }; | |
1700 | ||
af06216a RW |
1701 | static struct genl_family thermal_event_genl_family = { |
1702 | .id = GENL_ID_GENERATE, | |
1703 | .name = THERMAL_GENL_FAMILY_NAME, | |
1704 | .version = THERMAL_GENL_VERSION, | |
1705 | .maxattr = THERMAL_GENL_ATTR_MAX, | |
2a94fe48 JB |
1706 | .mcgrps = thermal_event_mcgrps, |
1707 | .n_mcgrps = ARRAY_SIZE(thermal_event_mcgrps), | |
af06216a RW |
1708 | }; |
1709 | ||
8ab3e6a0 EV |
1710 | int thermal_generate_netlink_event(struct thermal_zone_device *tz, |
1711 | enum events event) | |
4cb18728 D |
1712 | { |
1713 | struct sk_buff *skb; | |
1714 | struct nlattr *attr; | |
1715 | struct thermal_genl_event *thermal_event; | |
1716 | void *msg_header; | |
1717 | int size; | |
1718 | int result; | |
b11de07c | 1719 | static unsigned int thermal_event_seqnum; |
4cb18728 | 1720 | |
8ab3e6a0 EV |
1721 | if (!tz) |
1722 | return -EINVAL; | |
1723 | ||
4cb18728 | 1724 | /* allocate memory */ |
886ee546 JP |
1725 | size = nla_total_size(sizeof(struct thermal_genl_event)) + |
1726 | nla_total_size(0); | |
4cb18728 D |
1727 | |
1728 | skb = genlmsg_new(size, GFP_ATOMIC); | |
1729 | if (!skb) | |
1730 | return -ENOMEM; | |
1731 | ||
1732 | /* add the genetlink message header */ | |
1733 | msg_header = genlmsg_put(skb, 0, thermal_event_seqnum++, | |
1734 | &thermal_event_genl_family, 0, | |
1735 | THERMAL_GENL_CMD_EVENT); | |
1736 | if (!msg_header) { | |
1737 | nlmsg_free(skb); | |
1738 | return -ENOMEM; | |
1739 | } | |
1740 | ||
1741 | /* fill the data */ | |
886ee546 JP |
1742 | attr = nla_reserve(skb, THERMAL_GENL_ATTR_EVENT, |
1743 | sizeof(struct thermal_genl_event)); | |
4cb18728 D |
1744 | |
1745 | if (!attr) { | |
1746 | nlmsg_free(skb); | |
1747 | return -EINVAL; | |
1748 | } | |
1749 | ||
1750 | thermal_event = nla_data(attr); | |
1751 | if (!thermal_event) { | |
1752 | nlmsg_free(skb); | |
1753 | return -EINVAL; | |
1754 | } | |
1755 | ||
1756 | memset(thermal_event, 0, sizeof(struct thermal_genl_event)); | |
1757 | ||
8ab3e6a0 | 1758 | thermal_event->orig = tz->id; |
4cb18728 D |
1759 | thermal_event->event = event; |
1760 | ||
1761 | /* send multicast genetlink message */ | |
1762 | result = genlmsg_end(skb, msg_header); | |
1763 | if (result < 0) { | |
1764 | nlmsg_free(skb); | |
1765 | return result; | |
1766 | } | |
1767 | ||
68eb5503 | 1768 | result = genlmsg_multicast(&thermal_event_genl_family, skb, 0, |
2a94fe48 | 1769 | 0, GFP_ATOMIC); |
4cb18728 | 1770 | if (result) |
923e0b1e | 1771 | dev_err(&tz->device, "Failed to send netlink event:%d", result); |
4cb18728 D |
1772 | |
1773 | return result; | |
1774 | } | |
910cb1e3 | 1775 | EXPORT_SYMBOL_GPL(thermal_generate_netlink_event); |
4cb18728 D |
1776 | |
1777 | static int genetlink_init(void) | |
1778 | { | |
2a94fe48 | 1779 | return genl_register_family(&thermal_event_genl_family); |
4cb18728 D |
1780 | } |
1781 | ||
af06216a RW |
1782 | static void genetlink_exit(void) |
1783 | { | |
1784 | genl_unregister_family(&thermal_event_genl_family); | |
1785 | } | |
1786 | #else /* !CONFIG_NET */ | |
1787 | static inline int genetlink_init(void) { return 0; } | |
1788 | static inline void genetlink_exit(void) {} | |
1789 | #endif /* !CONFIG_NET */ | |
1790 | ||
80a26a5c ZR |
1791 | static int __init thermal_register_governors(void) |
1792 | { | |
1793 | int result; | |
1794 | ||
1795 | result = thermal_gov_step_wise_register(); | |
1796 | if (result) | |
1797 | return result; | |
1798 | ||
1799 | result = thermal_gov_fair_share_register(); | |
1800 | if (result) | |
1801 | return result; | |
1802 | ||
e4dbf98f PF |
1803 | result = thermal_gov_bang_bang_register(); |
1804 | if (result) | |
1805 | return result; | |
1806 | ||
80a26a5c ZR |
1807 | return thermal_gov_user_space_register(); |
1808 | } | |
1809 | ||
1810 | static void thermal_unregister_governors(void) | |
1811 | { | |
1812 | thermal_gov_step_wise_unregister(); | |
1813 | thermal_gov_fair_share_unregister(); | |
e4dbf98f | 1814 | thermal_gov_bang_bang_unregister(); |
80a26a5c ZR |
1815 | thermal_gov_user_space_unregister(); |
1816 | } | |
1817 | ||
203d3d4a ZR |
1818 | static int __init thermal_init(void) |
1819 | { | |
80a26a5c ZR |
1820 | int result; |
1821 | ||
1822 | result = thermal_register_governors(); | |
1823 | if (result) | |
1824 | goto error; | |
203d3d4a ZR |
1825 | |
1826 | result = class_register(&thermal_class); | |
80a26a5c ZR |
1827 | if (result) |
1828 | goto unregister_governors; | |
1829 | ||
4cb18728 | 1830 | result = genetlink_init(); |
80a26a5c ZR |
1831 | if (result) |
1832 | goto unregister_class; | |
1833 | ||
4e5e4705 EV |
1834 | result = of_parse_thermal_zones(); |
1835 | if (result) | |
1836 | goto exit_netlink; | |
1837 | ||
80a26a5c ZR |
1838 | return 0; |
1839 | ||
4e5e4705 EV |
1840 | exit_netlink: |
1841 | genetlink_exit(); | |
80a26a5c ZR |
1842 | unregister_class: |
1843 | class_unregister(&thermal_class); | |
9d367e5e LH |
1844 | unregister_governors: |
1845 | thermal_unregister_governors(); | |
80a26a5c ZR |
1846 | error: |
1847 | idr_destroy(&thermal_tz_idr); | |
1848 | idr_destroy(&thermal_cdev_idr); | |
1849 | mutex_destroy(&thermal_idr_lock); | |
1850 | mutex_destroy(&thermal_list_lock); | |
1851 | mutex_destroy(&thermal_governor_lock); | |
203d3d4a ZR |
1852 | return result; |
1853 | } | |
1854 | ||
1855 | static void __exit thermal_exit(void) | |
1856 | { | |
4e5e4705 | 1857 | of_thermal_destroy_zones(); |
80a26a5c | 1858 | genetlink_exit(); |
203d3d4a | 1859 | class_unregister(&thermal_class); |
80a26a5c | 1860 | thermal_unregister_governors(); |
203d3d4a ZR |
1861 | idr_destroy(&thermal_tz_idr); |
1862 | idr_destroy(&thermal_cdev_idr); | |
1863 | mutex_destroy(&thermal_idr_lock); | |
1864 | mutex_destroy(&thermal_list_lock); | |
80a26a5c | 1865 | mutex_destroy(&thermal_governor_lock); |
203d3d4a ZR |
1866 | } |
1867 | ||
4cb18728 | 1868 | fs_initcall(thermal_init); |
203d3d4a | 1869 | module_exit(thermal_exit); |