Commit | Line | Data |
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203d3d4a ZR |
1 | /* |
2 | * thermal.c - Generic Thermal Management Sysfs support. | |
3 | * | |
4 | * Copyright (C) 2008 Intel Corp | |
5 | * Copyright (C) 2008 Zhang Rui <rui.zhang@intel.com> | |
6 | * Copyright (C) 2008 Sujith Thomas <sujith.thomas@intel.com> | |
7 | * | |
8 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; version 2 of the License. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License along | |
20 | * with this program; if not, write to the Free Software Foundation, Inc., | |
21 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
22 | * | |
23 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
24 | */ | |
25 | ||
c5a01dd5 JP |
26 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
27 | ||
203d3d4a ZR |
28 | #include <linux/module.h> |
29 | #include <linux/device.h> | |
30 | #include <linux/err.h> | |
5a0e3ad6 | 31 | #include <linux/slab.h> |
203d3d4a ZR |
32 | #include <linux/kdev_t.h> |
33 | #include <linux/idr.h> | |
34 | #include <linux/thermal.h> | |
b1569e99 | 35 | #include <linux/reboot.h> |
42a5bf50 | 36 | #include <linux/string.h> |
4cb18728 D |
37 | #include <net/netlink.h> |
38 | #include <net/genetlink.h> | |
203d3d4a | 39 | |
71350db4 D |
40 | #include "thermal_core.h" |
41 | ||
63c4ec90 | 42 | MODULE_AUTHOR("Zhang Rui"); |
203d3d4a | 43 | MODULE_DESCRIPTION("Generic thermal management sysfs support"); |
6d8d4974 | 44 | MODULE_LICENSE("GPL v2"); |
203d3d4a | 45 | |
203d3d4a ZR |
46 | static DEFINE_IDR(thermal_tz_idr); |
47 | static DEFINE_IDR(thermal_cdev_idr); | |
48 | static DEFINE_MUTEX(thermal_idr_lock); | |
49 | ||
50 | static LIST_HEAD(thermal_tz_list); | |
51 | static LIST_HEAD(thermal_cdev_list); | |
a4a15485 D |
52 | static LIST_HEAD(thermal_governor_list); |
53 | ||
203d3d4a | 54 | static DEFINE_MUTEX(thermal_list_lock); |
a4a15485 D |
55 | static DEFINE_MUTEX(thermal_governor_lock); |
56 | ||
57 | static struct thermal_governor *__find_governor(const char *name) | |
58 | { | |
59 | struct thermal_governor *pos; | |
60 | ||
61 | list_for_each_entry(pos, &thermal_governor_list, governor_list) | |
62 | if (!strnicmp(name, pos->name, THERMAL_NAME_LENGTH)) | |
63 | return pos; | |
64 | ||
65 | return NULL; | |
66 | } | |
67 | ||
68 | int thermal_register_governor(struct thermal_governor *governor) | |
69 | { | |
70 | int err; | |
71 | const char *name; | |
72 | struct thermal_zone_device *pos; | |
73 | ||
74 | if (!governor) | |
75 | return -EINVAL; | |
76 | ||
77 | mutex_lock(&thermal_governor_lock); | |
78 | ||
79 | err = -EBUSY; | |
80 | if (__find_governor(governor->name) == NULL) { | |
81 | err = 0; | |
82 | list_add(&governor->governor_list, &thermal_governor_list); | |
83 | } | |
84 | ||
85 | mutex_lock(&thermal_list_lock); | |
86 | ||
87 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
88 | if (pos->governor) | |
89 | continue; | |
90 | if (pos->tzp) | |
91 | name = pos->tzp->governor_name; | |
92 | else | |
93 | name = DEFAULT_THERMAL_GOVERNOR; | |
94 | if (!strnicmp(name, governor->name, THERMAL_NAME_LENGTH)) | |
95 | pos->governor = governor; | |
96 | } | |
97 | ||
98 | mutex_unlock(&thermal_list_lock); | |
99 | mutex_unlock(&thermal_governor_lock); | |
100 | ||
101 | return err; | |
102 | } | |
a4a15485 D |
103 | |
104 | void thermal_unregister_governor(struct thermal_governor *governor) | |
105 | { | |
106 | struct thermal_zone_device *pos; | |
107 | ||
108 | if (!governor) | |
109 | return; | |
110 | ||
111 | mutex_lock(&thermal_governor_lock); | |
112 | ||
113 | if (__find_governor(governor->name) == NULL) | |
114 | goto exit; | |
115 | ||
116 | mutex_lock(&thermal_list_lock); | |
117 | ||
118 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
119 | if (!strnicmp(pos->governor->name, governor->name, | |
120 | THERMAL_NAME_LENGTH)) | |
121 | pos->governor = NULL; | |
122 | } | |
123 | ||
124 | mutex_unlock(&thermal_list_lock); | |
125 | list_del(&governor->governor_list); | |
126 | exit: | |
127 | mutex_unlock(&thermal_governor_lock); | |
128 | return; | |
129 | } | |
203d3d4a ZR |
130 | |
131 | static int get_idr(struct idr *idr, struct mutex *lock, int *id) | |
132 | { | |
6deb69fa | 133 | int ret; |
203d3d4a ZR |
134 | |
135 | if (lock) | |
136 | mutex_lock(lock); | |
6deb69fa | 137 | ret = idr_alloc(idr, NULL, 0, 0, GFP_KERNEL); |
203d3d4a ZR |
138 | if (lock) |
139 | mutex_unlock(lock); | |
6deb69fa TH |
140 | if (unlikely(ret < 0)) |
141 | return ret; | |
142 | *id = ret; | |
203d3d4a ZR |
143 | return 0; |
144 | } | |
145 | ||
146 | static void release_idr(struct idr *idr, struct mutex *lock, int id) | |
147 | { | |
148 | if (lock) | |
149 | mutex_lock(lock); | |
150 | idr_remove(idr, id); | |
151 | if (lock) | |
152 | mutex_unlock(lock); | |
153 | } | |
154 | ||
9b4298a0 D |
155 | int get_tz_trend(struct thermal_zone_device *tz, int trip) |
156 | { | |
157 | enum thermal_trend trend; | |
158 | ||
159 | if (!tz->ops->get_trend || tz->ops->get_trend(tz, trip, &trend)) { | |
160 | if (tz->temperature > tz->last_temperature) | |
161 | trend = THERMAL_TREND_RAISING; | |
162 | else if (tz->temperature < tz->last_temperature) | |
163 | trend = THERMAL_TREND_DROPPING; | |
164 | else | |
165 | trend = THERMAL_TREND_STABLE; | |
166 | } | |
167 | ||
168 | return trend; | |
169 | } | |
170 | EXPORT_SYMBOL(get_tz_trend); | |
171 | ||
172 | struct thermal_instance *get_thermal_instance(struct thermal_zone_device *tz, | |
173 | struct thermal_cooling_device *cdev, int trip) | |
174 | { | |
175 | struct thermal_instance *pos = NULL; | |
176 | struct thermal_instance *target_instance = NULL; | |
177 | ||
178 | mutex_lock(&tz->lock); | |
179 | mutex_lock(&cdev->lock); | |
180 | ||
181 | list_for_each_entry(pos, &tz->thermal_instances, tz_node) { | |
182 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { | |
183 | target_instance = pos; | |
184 | break; | |
185 | } | |
186 | } | |
187 | ||
188 | mutex_unlock(&cdev->lock); | |
189 | mutex_unlock(&tz->lock); | |
190 | ||
191 | return target_instance; | |
192 | } | |
193 | EXPORT_SYMBOL(get_thermal_instance); | |
194 | ||
7e8ee1e9 D |
195 | static void print_bind_err_msg(struct thermal_zone_device *tz, |
196 | struct thermal_cooling_device *cdev, int ret) | |
197 | { | |
198 | dev_err(&tz->device, "binding zone %s with cdev %s failed:%d\n", | |
199 | tz->type, cdev->type, ret); | |
200 | } | |
201 | ||
202 | static void __bind(struct thermal_zone_device *tz, int mask, | |
203 | struct thermal_cooling_device *cdev) | |
204 | { | |
205 | int i, ret; | |
206 | ||
207 | for (i = 0; i < tz->trips; i++) { | |
208 | if (mask & (1 << i)) { | |
209 | ret = thermal_zone_bind_cooling_device(tz, i, cdev, | |
210 | THERMAL_NO_LIMIT, THERMAL_NO_LIMIT); | |
211 | if (ret) | |
212 | print_bind_err_msg(tz, cdev, ret); | |
213 | } | |
214 | } | |
215 | } | |
216 | ||
217 | static void __unbind(struct thermal_zone_device *tz, int mask, | |
218 | struct thermal_cooling_device *cdev) | |
219 | { | |
220 | int i; | |
221 | ||
222 | for (i = 0; i < tz->trips; i++) | |
223 | if (mask & (1 << i)) | |
224 | thermal_zone_unbind_cooling_device(tz, i, cdev); | |
225 | } | |
226 | ||
227 | static void bind_cdev(struct thermal_cooling_device *cdev) | |
228 | { | |
229 | int i, ret; | |
230 | const struct thermal_zone_params *tzp; | |
231 | struct thermal_zone_device *pos = NULL; | |
232 | ||
233 | mutex_lock(&thermal_list_lock); | |
234 | ||
235 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
236 | if (!pos->tzp && !pos->ops->bind) | |
237 | continue; | |
238 | ||
239 | if (!pos->tzp && pos->ops->bind) { | |
240 | ret = pos->ops->bind(pos, cdev); | |
241 | if (ret) | |
242 | print_bind_err_msg(pos, cdev, ret); | |
243 | } | |
244 | ||
245 | tzp = pos->tzp; | |
791700cd HD |
246 | if (!tzp || !tzp->tbp) |
247 | continue; | |
7e8ee1e9 D |
248 | |
249 | for (i = 0; i < tzp->num_tbps; i++) { | |
250 | if (tzp->tbp[i].cdev || !tzp->tbp[i].match) | |
251 | continue; | |
252 | if (tzp->tbp[i].match(pos, cdev)) | |
253 | continue; | |
254 | tzp->tbp[i].cdev = cdev; | |
255 | __bind(pos, tzp->tbp[i].trip_mask, cdev); | |
256 | } | |
257 | } | |
258 | ||
259 | mutex_unlock(&thermal_list_lock); | |
260 | } | |
261 | ||
262 | static void bind_tz(struct thermal_zone_device *tz) | |
263 | { | |
264 | int i, ret; | |
265 | struct thermal_cooling_device *pos = NULL; | |
266 | const struct thermal_zone_params *tzp = tz->tzp; | |
267 | ||
268 | if (!tzp && !tz->ops->bind) | |
269 | return; | |
270 | ||
271 | mutex_lock(&thermal_list_lock); | |
272 | ||
273 | /* If there is no platform data, try to use ops->bind */ | |
274 | if (!tzp && tz->ops->bind) { | |
275 | list_for_each_entry(pos, &thermal_cdev_list, node) { | |
276 | ret = tz->ops->bind(tz, pos); | |
277 | if (ret) | |
278 | print_bind_err_msg(tz, pos, ret); | |
279 | } | |
280 | goto exit; | |
281 | } | |
282 | ||
791700cd | 283 | if (!tzp || !tzp->tbp) |
7e8ee1e9 D |
284 | goto exit; |
285 | ||
286 | list_for_each_entry(pos, &thermal_cdev_list, node) { | |
287 | for (i = 0; i < tzp->num_tbps; i++) { | |
288 | if (tzp->tbp[i].cdev || !tzp->tbp[i].match) | |
289 | continue; | |
290 | if (tzp->tbp[i].match(tz, pos)) | |
291 | continue; | |
292 | tzp->tbp[i].cdev = pos; | |
293 | __bind(tz, tzp->tbp[i].trip_mask, pos); | |
294 | } | |
295 | } | |
296 | exit: | |
297 | mutex_unlock(&thermal_list_lock); | |
298 | } | |
299 | ||
0c01ebbf D |
300 | static void thermal_zone_device_set_polling(struct thermal_zone_device *tz, |
301 | int delay) | |
302 | { | |
303 | if (delay > 1000) | |
304 | mod_delayed_work(system_freezable_wq, &tz->poll_queue, | |
305 | round_jiffies(msecs_to_jiffies(delay))); | |
306 | else if (delay) | |
307 | mod_delayed_work(system_freezable_wq, &tz->poll_queue, | |
308 | msecs_to_jiffies(delay)); | |
309 | else | |
310 | cancel_delayed_work(&tz->poll_queue); | |
311 | } | |
312 | ||
313 | static void monitor_thermal_zone(struct thermal_zone_device *tz) | |
314 | { | |
315 | mutex_lock(&tz->lock); | |
316 | ||
317 | if (tz->passive) | |
318 | thermal_zone_device_set_polling(tz, tz->passive_delay); | |
319 | else if (tz->polling_delay) | |
320 | thermal_zone_device_set_polling(tz, tz->polling_delay); | |
321 | else | |
322 | thermal_zone_device_set_polling(tz, 0); | |
323 | ||
324 | mutex_unlock(&tz->lock); | |
325 | } | |
326 | ||
327 | static void handle_non_critical_trips(struct thermal_zone_device *tz, | |
328 | int trip, enum thermal_trip_type trip_type) | |
329 | { | |
d567c686 ZR |
330 | if (tz->governor) |
331 | tz->governor->throttle(tz, trip); | |
0c01ebbf D |
332 | } |
333 | ||
334 | static void handle_critical_trips(struct thermal_zone_device *tz, | |
335 | int trip, enum thermal_trip_type trip_type) | |
336 | { | |
337 | long trip_temp; | |
338 | ||
339 | tz->ops->get_trip_temp(tz, trip, &trip_temp); | |
340 | ||
341 | /* If we have not crossed the trip_temp, we do not care. */ | |
342 | if (tz->temperature < trip_temp) | |
343 | return; | |
344 | ||
345 | if (tz->ops->notify) | |
346 | tz->ops->notify(tz, trip, trip_type); | |
347 | ||
348 | if (trip_type == THERMAL_TRIP_CRITICAL) { | |
923e0b1e EV |
349 | dev_emerg(&tz->device, |
350 | "critical temperature reached(%d C),shutting down\n", | |
351 | tz->temperature / 1000); | |
0c01ebbf D |
352 | orderly_poweroff(true); |
353 | } | |
354 | } | |
355 | ||
356 | static void handle_thermal_trip(struct thermal_zone_device *tz, int trip) | |
357 | { | |
358 | enum thermal_trip_type type; | |
359 | ||
360 | tz->ops->get_trip_type(tz, trip, &type); | |
361 | ||
362 | if (type == THERMAL_TRIP_CRITICAL || type == THERMAL_TRIP_HOT) | |
363 | handle_critical_trips(tz, trip, type); | |
364 | else | |
365 | handle_non_critical_trips(tz, trip, type); | |
366 | /* | |
367 | * Alright, we handled this trip successfully. | |
368 | * So, start monitoring again. | |
369 | */ | |
370 | monitor_thermal_zone(tz); | |
371 | } | |
372 | ||
837b26bb EV |
373 | /** |
374 | * thermal_zone_get_temp() - returns its the temperature of thermal zone | |
375 | * @tz: a valid pointer to a struct thermal_zone_device | |
376 | * @temp: a valid pointer to where to store the resulting temperature. | |
377 | * | |
378 | * When a valid thermal zone reference is passed, it will fetch its | |
379 | * temperature and fill @temp. | |
380 | * | |
381 | * Return: On success returns 0, an error code otherwise | |
382 | */ | |
383 | int thermal_zone_get_temp(struct thermal_zone_device *tz, unsigned long *temp) | |
e6e238c3 | 384 | { |
837b26bb | 385 | int ret = -EINVAL; |
5e20b2e5 ZR |
386 | #ifdef CONFIG_THERMAL_EMULATION |
387 | int count; | |
e6e238c3 ADK |
388 | unsigned long crit_temp = -1UL; |
389 | enum thermal_trip_type type; | |
5e20b2e5 | 390 | #endif |
e6e238c3 | 391 | |
9b19ec39 | 392 | if (!tz || IS_ERR(tz)) |
837b26bb EV |
393 | goto exit; |
394 | ||
e6e238c3 ADK |
395 | mutex_lock(&tz->lock); |
396 | ||
397 | ret = tz->ops->get_temp(tz, temp); | |
398 | #ifdef CONFIG_THERMAL_EMULATION | |
399 | if (!tz->emul_temperature) | |
400 | goto skip_emul; | |
401 | ||
402 | for (count = 0; count < tz->trips; count++) { | |
403 | ret = tz->ops->get_trip_type(tz, count, &type); | |
404 | if (!ret && type == THERMAL_TRIP_CRITICAL) { | |
405 | ret = tz->ops->get_trip_temp(tz, count, &crit_temp); | |
406 | break; | |
407 | } | |
408 | } | |
409 | ||
410 | if (ret) | |
411 | goto skip_emul; | |
412 | ||
413 | if (*temp < crit_temp) | |
414 | *temp = tz->emul_temperature; | |
415 | skip_emul: | |
416 | #endif | |
417 | mutex_unlock(&tz->lock); | |
837b26bb | 418 | exit: |
e6e238c3 ADK |
419 | return ret; |
420 | } | |
837b26bb | 421 | EXPORT_SYMBOL_GPL(thermal_zone_get_temp); |
e6e238c3 | 422 | |
0c01ebbf D |
423 | static void update_temperature(struct thermal_zone_device *tz) |
424 | { | |
425 | long temp; | |
426 | int ret; | |
427 | ||
e6e238c3 | 428 | ret = thermal_zone_get_temp(tz, &temp); |
0c01ebbf | 429 | if (ret) { |
923e0b1e EV |
430 | dev_warn(&tz->device, "failed to read out thermal zone %d\n", |
431 | tz->id); | |
e6e238c3 | 432 | return; |
0c01ebbf D |
433 | } |
434 | ||
e6e238c3 | 435 | mutex_lock(&tz->lock); |
0c01ebbf D |
436 | tz->last_temperature = tz->temperature; |
437 | tz->temperature = temp; | |
0c01ebbf D |
438 | mutex_unlock(&tz->lock); |
439 | } | |
440 | ||
441 | void thermal_zone_device_update(struct thermal_zone_device *tz) | |
442 | { | |
443 | int count; | |
444 | ||
445 | update_temperature(tz); | |
446 | ||
447 | for (count = 0; count < tz->trips; count++) | |
448 | handle_thermal_trip(tz, count); | |
449 | } | |
910cb1e3 | 450 | EXPORT_SYMBOL_GPL(thermal_zone_device_update); |
0c01ebbf D |
451 | |
452 | static void thermal_zone_device_check(struct work_struct *work) | |
453 | { | |
454 | struct thermal_zone_device *tz = container_of(work, struct | |
455 | thermal_zone_device, | |
456 | poll_queue.work); | |
457 | thermal_zone_device_update(tz); | |
458 | } | |
459 | ||
203d3d4a ZR |
460 | /* sys I/F for thermal zone */ |
461 | ||
462 | #define to_thermal_zone(_dev) \ | |
463 | container_of(_dev, struct thermal_zone_device, device) | |
464 | ||
465 | static ssize_t | |
466 | type_show(struct device *dev, struct device_attribute *attr, char *buf) | |
467 | { | |
468 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
469 | ||
470 | return sprintf(buf, "%s\n", tz->type); | |
471 | } | |
472 | ||
473 | static ssize_t | |
474 | temp_show(struct device *dev, struct device_attribute *attr, char *buf) | |
475 | { | |
476 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
477 | long temperature; |
478 | int ret; | |
203d3d4a | 479 | |
e6e238c3 | 480 | ret = thermal_zone_get_temp(tz, &temperature); |
6503e5df MG |
481 | |
482 | if (ret) | |
483 | return ret; | |
484 | ||
485 | return sprintf(buf, "%ld\n", temperature); | |
203d3d4a ZR |
486 | } |
487 | ||
488 | static ssize_t | |
489 | mode_show(struct device *dev, struct device_attribute *attr, char *buf) | |
490 | { | |
491 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
492 | enum thermal_device_mode mode; |
493 | int result; | |
203d3d4a ZR |
494 | |
495 | if (!tz->ops->get_mode) | |
496 | return -EPERM; | |
497 | ||
6503e5df MG |
498 | result = tz->ops->get_mode(tz, &mode); |
499 | if (result) | |
500 | return result; | |
501 | ||
502 | return sprintf(buf, "%s\n", mode == THERMAL_DEVICE_ENABLED ? "enabled" | |
503 | : "disabled"); | |
203d3d4a ZR |
504 | } |
505 | ||
506 | static ssize_t | |
507 | mode_store(struct device *dev, struct device_attribute *attr, | |
508 | const char *buf, size_t count) | |
509 | { | |
510 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
511 | int result; | |
512 | ||
513 | if (!tz->ops->set_mode) | |
514 | return -EPERM; | |
515 | ||
f1f0e2ac | 516 | if (!strncmp(buf, "enabled", sizeof("enabled") - 1)) |
6503e5df | 517 | result = tz->ops->set_mode(tz, THERMAL_DEVICE_ENABLED); |
f1f0e2ac | 518 | else if (!strncmp(buf, "disabled", sizeof("disabled") - 1)) |
6503e5df MG |
519 | result = tz->ops->set_mode(tz, THERMAL_DEVICE_DISABLED); |
520 | else | |
521 | result = -EINVAL; | |
522 | ||
203d3d4a ZR |
523 | if (result) |
524 | return result; | |
525 | ||
526 | return count; | |
527 | } | |
528 | ||
529 | static ssize_t | |
530 | trip_point_type_show(struct device *dev, struct device_attribute *attr, | |
531 | char *buf) | |
532 | { | |
533 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
534 | enum thermal_trip_type type; |
535 | int trip, result; | |
203d3d4a ZR |
536 | |
537 | if (!tz->ops->get_trip_type) | |
538 | return -EPERM; | |
539 | ||
540 | if (!sscanf(attr->attr.name, "trip_point_%d_type", &trip)) | |
541 | return -EINVAL; | |
542 | ||
6503e5df MG |
543 | result = tz->ops->get_trip_type(tz, trip, &type); |
544 | if (result) | |
545 | return result; | |
546 | ||
547 | switch (type) { | |
548 | case THERMAL_TRIP_CRITICAL: | |
625120a4 | 549 | return sprintf(buf, "critical\n"); |
6503e5df | 550 | case THERMAL_TRIP_HOT: |
625120a4 | 551 | return sprintf(buf, "hot\n"); |
6503e5df | 552 | case THERMAL_TRIP_PASSIVE: |
625120a4 | 553 | return sprintf(buf, "passive\n"); |
6503e5df | 554 | case THERMAL_TRIP_ACTIVE: |
625120a4 | 555 | return sprintf(buf, "active\n"); |
6503e5df | 556 | default: |
625120a4 | 557 | return sprintf(buf, "unknown\n"); |
6503e5df | 558 | } |
203d3d4a ZR |
559 | } |
560 | ||
c56f5c03 D |
561 | static ssize_t |
562 | trip_point_temp_store(struct device *dev, struct device_attribute *attr, | |
563 | const char *buf, size_t count) | |
564 | { | |
565 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
566 | int trip, ret; | |
567 | unsigned long temperature; | |
568 | ||
569 | if (!tz->ops->set_trip_temp) | |
570 | return -EPERM; | |
571 | ||
572 | if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip)) | |
573 | return -EINVAL; | |
574 | ||
575 | if (kstrtoul(buf, 10, &temperature)) | |
576 | return -EINVAL; | |
577 | ||
578 | ret = tz->ops->set_trip_temp(tz, trip, temperature); | |
579 | ||
580 | return ret ? ret : count; | |
581 | } | |
582 | ||
203d3d4a ZR |
583 | static ssize_t |
584 | trip_point_temp_show(struct device *dev, struct device_attribute *attr, | |
585 | char *buf) | |
586 | { | |
587 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
588 | int trip, ret; |
589 | long temperature; | |
203d3d4a ZR |
590 | |
591 | if (!tz->ops->get_trip_temp) | |
592 | return -EPERM; | |
593 | ||
594 | if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip)) | |
595 | return -EINVAL; | |
596 | ||
6503e5df MG |
597 | ret = tz->ops->get_trip_temp(tz, trip, &temperature); |
598 | ||
599 | if (ret) | |
600 | return ret; | |
601 | ||
602 | return sprintf(buf, "%ld\n", temperature); | |
203d3d4a ZR |
603 | } |
604 | ||
27365a6c D |
605 | static ssize_t |
606 | trip_point_hyst_store(struct device *dev, struct device_attribute *attr, | |
607 | const char *buf, size_t count) | |
608 | { | |
609 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
610 | int trip, ret; | |
611 | unsigned long temperature; | |
612 | ||
613 | if (!tz->ops->set_trip_hyst) | |
614 | return -EPERM; | |
615 | ||
616 | if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip)) | |
617 | return -EINVAL; | |
618 | ||
619 | if (kstrtoul(buf, 10, &temperature)) | |
620 | return -EINVAL; | |
621 | ||
622 | /* | |
623 | * We are not doing any check on the 'temperature' value | |
624 | * here. The driver implementing 'set_trip_hyst' has to | |
625 | * take care of this. | |
626 | */ | |
627 | ret = tz->ops->set_trip_hyst(tz, trip, temperature); | |
628 | ||
629 | return ret ? ret : count; | |
630 | } | |
631 | ||
632 | static ssize_t | |
633 | trip_point_hyst_show(struct device *dev, struct device_attribute *attr, | |
634 | char *buf) | |
635 | { | |
636 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
637 | int trip, ret; | |
638 | unsigned long temperature; | |
639 | ||
640 | if (!tz->ops->get_trip_hyst) | |
641 | return -EPERM; | |
642 | ||
643 | if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip)) | |
644 | return -EINVAL; | |
645 | ||
646 | ret = tz->ops->get_trip_hyst(tz, trip, &temperature); | |
647 | ||
648 | return ret ? ret : sprintf(buf, "%ld\n", temperature); | |
649 | } | |
650 | ||
03a971a2 MG |
651 | static ssize_t |
652 | passive_store(struct device *dev, struct device_attribute *attr, | |
653 | const char *buf, size_t count) | |
654 | { | |
655 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
656 | struct thermal_cooling_device *cdev = NULL; | |
657 | int state; | |
658 | ||
659 | if (!sscanf(buf, "%d\n", &state)) | |
660 | return -EINVAL; | |
661 | ||
3d8e3ad8 FP |
662 | /* sanity check: values below 1000 millicelcius don't make sense |
663 | * and can cause the system to go into a thermal heart attack | |
664 | */ | |
665 | if (state && state < 1000) | |
666 | return -EINVAL; | |
667 | ||
03a971a2 MG |
668 | if (state && !tz->forced_passive) { |
669 | mutex_lock(&thermal_list_lock); | |
670 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
671 | if (!strncmp("Processor", cdev->type, | |
672 | sizeof("Processor"))) | |
673 | thermal_zone_bind_cooling_device(tz, | |
9d99842f ZR |
674 | THERMAL_TRIPS_NONE, cdev, |
675 | THERMAL_NO_LIMIT, | |
676 | THERMAL_NO_LIMIT); | |
03a971a2 MG |
677 | } |
678 | mutex_unlock(&thermal_list_lock); | |
e4143b03 FP |
679 | if (!tz->passive_delay) |
680 | tz->passive_delay = 1000; | |
03a971a2 MG |
681 | } else if (!state && tz->forced_passive) { |
682 | mutex_lock(&thermal_list_lock); | |
683 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
684 | if (!strncmp("Processor", cdev->type, | |
685 | sizeof("Processor"))) | |
686 | thermal_zone_unbind_cooling_device(tz, | |
687 | THERMAL_TRIPS_NONE, | |
688 | cdev); | |
689 | } | |
690 | mutex_unlock(&thermal_list_lock); | |
e4143b03 | 691 | tz->passive_delay = 0; |
03a971a2 MG |
692 | } |
693 | ||
03a971a2 MG |
694 | tz->forced_passive = state; |
695 | ||
696 | thermal_zone_device_update(tz); | |
697 | ||
698 | return count; | |
699 | } | |
700 | ||
701 | static ssize_t | |
702 | passive_show(struct device *dev, struct device_attribute *attr, | |
703 | char *buf) | |
704 | { | |
705 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
706 | ||
707 | return sprintf(buf, "%d\n", tz->forced_passive); | |
708 | } | |
709 | ||
5a2c090b D |
710 | static ssize_t |
711 | policy_store(struct device *dev, struct device_attribute *attr, | |
712 | const char *buf, size_t count) | |
713 | { | |
714 | int ret = -EINVAL; | |
715 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
716 | struct thermal_governor *gov; | |
42a5bf50 AS |
717 | char name[THERMAL_NAME_LENGTH]; |
718 | ||
719 | snprintf(name, sizeof(name), "%s", buf); | |
5a2c090b D |
720 | |
721 | mutex_lock(&thermal_governor_lock); | |
722 | ||
42a5bf50 | 723 | gov = __find_governor(strim(name)); |
5a2c090b D |
724 | if (!gov) |
725 | goto exit; | |
726 | ||
727 | tz->governor = gov; | |
728 | ret = count; | |
729 | ||
730 | exit: | |
731 | mutex_unlock(&thermal_governor_lock); | |
732 | return ret; | |
733 | } | |
734 | ||
735 | static ssize_t | |
736 | policy_show(struct device *dev, struct device_attribute *devattr, char *buf) | |
737 | { | |
738 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
739 | ||
740 | return sprintf(buf, "%s\n", tz->governor->name); | |
741 | } | |
742 | ||
e6e238c3 ADK |
743 | #ifdef CONFIG_THERMAL_EMULATION |
744 | static ssize_t | |
745 | emul_temp_store(struct device *dev, struct device_attribute *attr, | |
746 | const char *buf, size_t count) | |
747 | { | |
748 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
749 | int ret = 0; | |
750 | unsigned long temperature; | |
751 | ||
752 | if (kstrtoul(buf, 10, &temperature)) | |
753 | return -EINVAL; | |
754 | ||
755 | if (!tz->ops->set_emul_temp) { | |
756 | mutex_lock(&tz->lock); | |
757 | tz->emul_temperature = temperature; | |
758 | mutex_unlock(&tz->lock); | |
759 | } else { | |
760 | ret = tz->ops->set_emul_temp(tz, temperature); | |
761 | } | |
762 | ||
763 | return ret ? ret : count; | |
764 | } | |
765 | static DEVICE_ATTR(emul_temp, S_IWUSR, NULL, emul_temp_store); | |
766 | #endif/*CONFIG_THERMAL_EMULATION*/ | |
767 | ||
203d3d4a ZR |
768 | static DEVICE_ATTR(type, 0444, type_show, NULL); |
769 | static DEVICE_ATTR(temp, 0444, temp_show, NULL); | |
770 | static DEVICE_ATTR(mode, 0644, mode_show, mode_store); | |
886ee546 | 771 | static DEVICE_ATTR(passive, S_IRUGO | S_IWUSR, passive_show, passive_store); |
5a2c090b | 772 | static DEVICE_ATTR(policy, S_IRUGO | S_IWUSR, policy_show, policy_store); |
203d3d4a | 773 | |
203d3d4a ZR |
774 | /* sys I/F for cooling device */ |
775 | #define to_cooling_device(_dev) \ | |
776 | container_of(_dev, struct thermal_cooling_device, device) | |
777 | ||
778 | static ssize_t | |
779 | thermal_cooling_device_type_show(struct device *dev, | |
780 | struct device_attribute *attr, char *buf) | |
781 | { | |
782 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
783 | ||
784 | return sprintf(buf, "%s\n", cdev->type); | |
785 | } | |
786 | ||
787 | static ssize_t | |
788 | thermal_cooling_device_max_state_show(struct device *dev, | |
789 | struct device_attribute *attr, char *buf) | |
790 | { | |
791 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df MG |
792 | unsigned long state; |
793 | int ret; | |
203d3d4a | 794 | |
6503e5df MG |
795 | ret = cdev->ops->get_max_state(cdev, &state); |
796 | if (ret) | |
797 | return ret; | |
798 | return sprintf(buf, "%ld\n", state); | |
203d3d4a ZR |
799 | } |
800 | ||
801 | static ssize_t | |
802 | thermal_cooling_device_cur_state_show(struct device *dev, | |
803 | struct device_attribute *attr, char *buf) | |
804 | { | |
805 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df MG |
806 | unsigned long state; |
807 | int ret; | |
203d3d4a | 808 | |
6503e5df MG |
809 | ret = cdev->ops->get_cur_state(cdev, &state); |
810 | if (ret) | |
811 | return ret; | |
812 | return sprintf(buf, "%ld\n", state); | |
203d3d4a ZR |
813 | } |
814 | ||
815 | static ssize_t | |
816 | thermal_cooling_device_cur_state_store(struct device *dev, | |
817 | struct device_attribute *attr, | |
818 | const char *buf, size_t count) | |
819 | { | |
820 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df | 821 | unsigned long state; |
203d3d4a ZR |
822 | int result; |
823 | ||
6503e5df | 824 | if (!sscanf(buf, "%ld\n", &state)) |
203d3d4a ZR |
825 | return -EINVAL; |
826 | ||
edb94918 | 827 | if ((long)state < 0) |
203d3d4a ZR |
828 | return -EINVAL; |
829 | ||
830 | result = cdev->ops->set_cur_state(cdev, state); | |
831 | if (result) | |
832 | return result; | |
833 | return count; | |
834 | } | |
835 | ||
836 | static struct device_attribute dev_attr_cdev_type = | |
543a9561 | 837 | __ATTR(type, 0444, thermal_cooling_device_type_show, NULL); |
203d3d4a ZR |
838 | static DEVICE_ATTR(max_state, 0444, |
839 | thermal_cooling_device_max_state_show, NULL); | |
840 | static DEVICE_ATTR(cur_state, 0644, | |
841 | thermal_cooling_device_cur_state_show, | |
842 | thermal_cooling_device_cur_state_store); | |
843 | ||
844 | static ssize_t | |
845 | thermal_cooling_device_trip_point_show(struct device *dev, | |
543a9561 | 846 | struct device_attribute *attr, char *buf) |
203d3d4a | 847 | { |
b81b6ba3 | 848 | struct thermal_instance *instance; |
203d3d4a ZR |
849 | |
850 | instance = | |
b81b6ba3 | 851 | container_of(attr, struct thermal_instance, attr); |
203d3d4a ZR |
852 | |
853 | if (instance->trip == THERMAL_TRIPS_NONE) | |
854 | return sprintf(buf, "-1\n"); | |
855 | else | |
856 | return sprintf(buf, "%d\n", instance->trip); | |
857 | } | |
858 | ||
859 | /* Device management */ | |
860 | ||
16d75239 RH |
861 | #if defined(CONFIG_THERMAL_HWMON) |
862 | ||
e68b16ab ZR |
863 | /* hwmon sys I/F */ |
864 | #include <linux/hwmon.h> | |
31f5396a JD |
865 | |
866 | /* thermal zone devices with the same type share one hwmon device */ | |
867 | struct thermal_hwmon_device { | |
868 | char type[THERMAL_NAME_LENGTH]; | |
869 | struct device *device; | |
870 | int count; | |
871 | struct list_head tz_list; | |
872 | struct list_head node; | |
873 | }; | |
874 | ||
875 | struct thermal_hwmon_attr { | |
876 | struct device_attribute attr; | |
877 | char name[16]; | |
878 | }; | |
879 | ||
880 | /* one temperature input for each thermal zone */ | |
881 | struct thermal_hwmon_temp { | |
882 | struct list_head hwmon_node; | |
883 | struct thermal_zone_device *tz; | |
884 | struct thermal_hwmon_attr temp_input; /* hwmon sys attr */ | |
885 | struct thermal_hwmon_attr temp_crit; /* hwmon sys attr */ | |
886 | }; | |
887 | ||
e68b16ab ZR |
888 | static LIST_HEAD(thermal_hwmon_list); |
889 | ||
890 | static ssize_t | |
891 | name_show(struct device *dev, struct device_attribute *attr, char *buf) | |
892 | { | |
0e968a3b | 893 | struct thermal_hwmon_device *hwmon = dev_get_drvdata(dev); |
e68b16ab ZR |
894 | return sprintf(buf, "%s\n", hwmon->type); |
895 | } | |
896 | static DEVICE_ATTR(name, 0444, name_show, NULL); | |
897 | ||
898 | static ssize_t | |
899 | temp_input_show(struct device *dev, struct device_attribute *attr, char *buf) | |
900 | { | |
6503e5df MG |
901 | long temperature; |
902 | int ret; | |
e68b16ab ZR |
903 | struct thermal_hwmon_attr *hwmon_attr |
904 | = container_of(attr, struct thermal_hwmon_attr, attr); | |
31f5396a JD |
905 | struct thermal_hwmon_temp *temp |
906 | = container_of(hwmon_attr, struct thermal_hwmon_temp, | |
e68b16ab | 907 | temp_input); |
31f5396a | 908 | struct thermal_zone_device *tz = temp->tz; |
e68b16ab | 909 | |
e6e238c3 | 910 | ret = thermal_zone_get_temp(tz, &temperature); |
6503e5df MG |
911 | |
912 | if (ret) | |
913 | return ret; | |
914 | ||
915 | return sprintf(buf, "%ld\n", temperature); | |
e68b16ab ZR |
916 | } |
917 | ||
918 | static ssize_t | |
919 | temp_crit_show(struct device *dev, struct device_attribute *attr, | |
920 | char *buf) | |
921 | { | |
922 | struct thermal_hwmon_attr *hwmon_attr | |
923 | = container_of(attr, struct thermal_hwmon_attr, attr); | |
31f5396a JD |
924 | struct thermal_hwmon_temp *temp |
925 | = container_of(hwmon_attr, struct thermal_hwmon_temp, | |
e68b16ab | 926 | temp_crit); |
31f5396a | 927 | struct thermal_zone_device *tz = temp->tz; |
6503e5df MG |
928 | long temperature; |
929 | int ret; | |
930 | ||
931 | ret = tz->ops->get_trip_temp(tz, 0, &temperature); | |
932 | if (ret) | |
933 | return ret; | |
e68b16ab | 934 | |
6503e5df | 935 | return sprintf(buf, "%ld\n", temperature); |
e68b16ab ZR |
936 | } |
937 | ||
938 | ||
0d97d7a4 JD |
939 | static struct thermal_hwmon_device * |
940 | thermal_hwmon_lookup_by_type(const struct thermal_zone_device *tz) | |
e68b16ab ZR |
941 | { |
942 | struct thermal_hwmon_device *hwmon; | |
e68b16ab ZR |
943 | |
944 | mutex_lock(&thermal_list_lock); | |
945 | list_for_each_entry(hwmon, &thermal_hwmon_list, node) | |
946 | if (!strcmp(hwmon->type, tz->type)) { | |
e68b16ab | 947 | mutex_unlock(&thermal_list_lock); |
0d97d7a4 | 948 | return hwmon; |
e68b16ab ZR |
949 | } |
950 | mutex_unlock(&thermal_list_lock); | |
951 | ||
0d97d7a4 JD |
952 | return NULL; |
953 | } | |
954 | ||
31f5396a JD |
955 | /* Find the temperature input matching a given thermal zone */ |
956 | static struct thermal_hwmon_temp * | |
957 | thermal_hwmon_lookup_temp(const struct thermal_hwmon_device *hwmon, | |
958 | const struct thermal_zone_device *tz) | |
959 | { | |
960 | struct thermal_hwmon_temp *temp; | |
961 | ||
962 | mutex_lock(&thermal_list_lock); | |
963 | list_for_each_entry(temp, &hwmon->tz_list, hwmon_node) | |
964 | if (temp->tz == tz) { | |
965 | mutex_unlock(&thermal_list_lock); | |
966 | return temp; | |
967 | } | |
968 | mutex_unlock(&thermal_list_lock); | |
969 | ||
970 | return NULL; | |
971 | } | |
972 | ||
0d97d7a4 JD |
973 | static int |
974 | thermal_add_hwmon_sysfs(struct thermal_zone_device *tz) | |
975 | { | |
976 | struct thermal_hwmon_device *hwmon; | |
31f5396a | 977 | struct thermal_hwmon_temp *temp; |
0d97d7a4 JD |
978 | int new_hwmon_device = 1; |
979 | int result; | |
980 | ||
981 | hwmon = thermal_hwmon_lookup_by_type(tz); | |
982 | if (hwmon) { | |
983 | new_hwmon_device = 0; | |
984 | goto register_sys_interface; | |
985 | } | |
986 | ||
e68b16ab ZR |
987 | hwmon = kzalloc(sizeof(struct thermal_hwmon_device), GFP_KERNEL); |
988 | if (!hwmon) | |
989 | return -ENOMEM; | |
990 | ||
991 | INIT_LIST_HEAD(&hwmon->tz_list); | |
992 | strlcpy(hwmon->type, tz->type, THERMAL_NAME_LENGTH); | |
993 | hwmon->device = hwmon_device_register(NULL); | |
994 | if (IS_ERR(hwmon->device)) { | |
995 | result = PTR_ERR(hwmon->device); | |
996 | goto free_mem; | |
997 | } | |
0e968a3b | 998 | dev_set_drvdata(hwmon->device, hwmon); |
e68b16ab ZR |
999 | result = device_create_file(hwmon->device, &dev_attr_name); |
1000 | if (result) | |
b299eb5c | 1001 | goto free_mem; |
e68b16ab ZR |
1002 | |
1003 | register_sys_interface: | |
31f5396a JD |
1004 | temp = kzalloc(sizeof(struct thermal_hwmon_temp), GFP_KERNEL); |
1005 | if (!temp) { | |
1006 | result = -ENOMEM; | |
1007 | goto unregister_name; | |
1008 | } | |
1009 | ||
1010 | temp->tz = tz; | |
e68b16ab ZR |
1011 | hwmon->count++; |
1012 | ||
79a49168 | 1013 | snprintf(temp->temp_input.name, sizeof(temp->temp_input.name), |
e68b16ab | 1014 | "temp%d_input", hwmon->count); |
31f5396a JD |
1015 | temp->temp_input.attr.attr.name = temp->temp_input.name; |
1016 | temp->temp_input.attr.attr.mode = 0444; | |
1017 | temp->temp_input.attr.show = temp_input_show; | |
1018 | sysfs_attr_init(&temp->temp_input.attr.attr); | |
1019 | result = device_create_file(hwmon->device, &temp->temp_input.attr); | |
e68b16ab | 1020 | if (result) |
31f5396a | 1021 | goto free_temp_mem; |
e68b16ab ZR |
1022 | |
1023 | if (tz->ops->get_crit_temp) { | |
1024 | unsigned long temperature; | |
1025 | if (!tz->ops->get_crit_temp(tz, &temperature)) { | |
79a49168 GR |
1026 | snprintf(temp->temp_crit.name, |
1027 | sizeof(temp->temp_crit.name), | |
e68b16ab | 1028 | "temp%d_crit", hwmon->count); |
31f5396a JD |
1029 | temp->temp_crit.attr.attr.name = temp->temp_crit.name; |
1030 | temp->temp_crit.attr.attr.mode = 0444; | |
1031 | temp->temp_crit.attr.show = temp_crit_show; | |
1032 | sysfs_attr_init(&temp->temp_crit.attr.attr); | |
e68b16ab | 1033 | result = device_create_file(hwmon->device, |
31f5396a | 1034 | &temp->temp_crit.attr); |
e68b16ab | 1035 | if (result) |
b299eb5c | 1036 | goto unregister_input; |
e68b16ab ZR |
1037 | } |
1038 | } | |
1039 | ||
1040 | mutex_lock(&thermal_list_lock); | |
1041 | if (new_hwmon_device) | |
1042 | list_add_tail(&hwmon->node, &thermal_hwmon_list); | |
31f5396a | 1043 | list_add_tail(&temp->hwmon_node, &hwmon->tz_list); |
e68b16ab ZR |
1044 | mutex_unlock(&thermal_list_lock); |
1045 | ||
1046 | return 0; | |
1047 | ||
b299eb5c | 1048 | unregister_input: |
31f5396a JD |
1049 | device_remove_file(hwmon->device, &temp->temp_input.attr); |
1050 | free_temp_mem: | |
1051 | kfree(temp); | |
b299eb5c | 1052 | unregister_name: |
e68b16ab ZR |
1053 | if (new_hwmon_device) { |
1054 | device_remove_file(hwmon->device, &dev_attr_name); | |
1055 | hwmon_device_unregister(hwmon->device); | |
1056 | } | |
1057 | free_mem: | |
1058 | if (new_hwmon_device) | |
1059 | kfree(hwmon); | |
1060 | ||
1061 | return result; | |
1062 | } | |
1063 | ||
1064 | static void | |
1065 | thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz) | |
1066 | { | |
31f5396a JD |
1067 | struct thermal_hwmon_device *hwmon; |
1068 | struct thermal_hwmon_temp *temp; | |
1069 | ||
1070 | hwmon = thermal_hwmon_lookup_by_type(tz); | |
1071 | if (unlikely(!hwmon)) { | |
1072 | /* Should never happen... */ | |
1073 | dev_dbg(&tz->device, "hwmon device lookup failed!\n"); | |
1074 | return; | |
1075 | } | |
1076 | ||
1077 | temp = thermal_hwmon_lookup_temp(hwmon, tz); | |
1078 | if (unlikely(!temp)) { | |
1079 | /* Should never happen... */ | |
1080 | dev_dbg(&tz->device, "temperature input lookup failed!\n"); | |
1081 | return; | |
1082 | } | |
e68b16ab | 1083 | |
31f5396a | 1084 | device_remove_file(hwmon->device, &temp->temp_input.attr); |
b299eb5c | 1085 | if (tz->ops->get_crit_temp) |
31f5396a | 1086 | device_remove_file(hwmon->device, &temp->temp_crit.attr); |
e68b16ab ZR |
1087 | |
1088 | mutex_lock(&thermal_list_lock); | |
31f5396a JD |
1089 | list_del(&temp->hwmon_node); |
1090 | kfree(temp); | |
e68b16ab ZR |
1091 | if (!list_empty(&hwmon->tz_list)) { |
1092 | mutex_unlock(&thermal_list_lock); | |
1093 | return; | |
1094 | } | |
1095 | list_del(&hwmon->node); | |
1096 | mutex_unlock(&thermal_list_lock); | |
1097 | ||
1098 | device_remove_file(hwmon->device, &dev_attr_name); | |
1099 | hwmon_device_unregister(hwmon->device); | |
1100 | kfree(hwmon); | |
1101 | } | |
1102 | #else | |
1103 | static int | |
1104 | thermal_add_hwmon_sysfs(struct thermal_zone_device *tz) | |
1105 | { | |
1106 | return 0; | |
1107 | } | |
1108 | ||
1109 | static void | |
1110 | thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz) | |
1111 | { | |
1112 | } | |
1113 | #endif | |
1114 | ||
203d3d4a | 1115 | /** |
d2e4eb83 EV |
1116 | * thermal_zone_bind_cooling_device() - bind a cooling device to a thermal zone |
1117 | * @tz: pointer to struct thermal_zone_device | |
203d3d4a ZR |
1118 | * @trip: indicates which trip point the cooling devices is |
1119 | * associated with in this thermal zone. | |
d2e4eb83 EV |
1120 | * @cdev: pointer to struct thermal_cooling_device |
1121 | * @upper: the Maximum cooling state for this trip point. | |
1122 | * THERMAL_NO_LIMIT means no upper limit, | |
1123 | * and the cooling device can be in max_state. | |
1124 | * @lower: the Minimum cooling state can be used for this trip point. | |
1125 | * THERMAL_NO_LIMIT means no lower limit, | |
1126 | * and the cooling device can be in cooling state 0. | |
543a9561 | 1127 | * |
d2e4eb83 EV |
1128 | * This interface function bind a thermal cooling device to the certain trip |
1129 | * point of a thermal zone device. | |
543a9561 | 1130 | * This function is usually called in the thermal zone device .bind callback. |
d2e4eb83 EV |
1131 | * |
1132 | * Return: 0 on success, the proper error value otherwise. | |
203d3d4a ZR |
1133 | */ |
1134 | int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, | |
1135 | int trip, | |
9d99842f ZR |
1136 | struct thermal_cooling_device *cdev, |
1137 | unsigned long upper, unsigned long lower) | |
203d3d4a | 1138 | { |
b81b6ba3 ZR |
1139 | struct thermal_instance *dev; |
1140 | struct thermal_instance *pos; | |
c7516709 TS |
1141 | struct thermal_zone_device *pos1; |
1142 | struct thermal_cooling_device *pos2; | |
74051ba5 | 1143 | unsigned long max_state; |
203d3d4a ZR |
1144 | int result; |
1145 | ||
543a9561 | 1146 | if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE)) |
203d3d4a ZR |
1147 | return -EINVAL; |
1148 | ||
c7516709 TS |
1149 | list_for_each_entry(pos1, &thermal_tz_list, node) { |
1150 | if (pos1 == tz) | |
1151 | break; | |
1152 | } | |
1153 | list_for_each_entry(pos2, &thermal_cdev_list, node) { | |
1154 | if (pos2 == cdev) | |
1155 | break; | |
1156 | } | |
1157 | ||
1158 | if (tz != pos1 || cdev != pos2) | |
203d3d4a ZR |
1159 | return -EINVAL; |
1160 | ||
9d99842f ZR |
1161 | cdev->ops->get_max_state(cdev, &max_state); |
1162 | ||
1163 | /* lower default 0, upper default max_state */ | |
1164 | lower = lower == THERMAL_NO_LIMIT ? 0 : lower; | |
1165 | upper = upper == THERMAL_NO_LIMIT ? max_state : upper; | |
1166 | ||
1167 | if (lower > upper || upper > max_state) | |
1168 | return -EINVAL; | |
1169 | ||
203d3d4a | 1170 | dev = |
b81b6ba3 | 1171 | kzalloc(sizeof(struct thermal_instance), GFP_KERNEL); |
203d3d4a ZR |
1172 | if (!dev) |
1173 | return -ENOMEM; | |
1174 | dev->tz = tz; | |
1175 | dev->cdev = cdev; | |
1176 | dev->trip = trip; | |
9d99842f ZR |
1177 | dev->upper = upper; |
1178 | dev->lower = lower; | |
ce119f83 | 1179 | dev->target = THERMAL_NO_TARGET; |
74051ba5 | 1180 | |
203d3d4a ZR |
1181 | result = get_idr(&tz->idr, &tz->lock, &dev->id); |
1182 | if (result) | |
1183 | goto free_mem; | |
1184 | ||
1185 | sprintf(dev->name, "cdev%d", dev->id); | |
1186 | result = | |
1187 | sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev->name); | |
1188 | if (result) | |
1189 | goto release_idr; | |
1190 | ||
1191 | sprintf(dev->attr_name, "cdev%d_trip_point", dev->id); | |
975f8c56 | 1192 | sysfs_attr_init(&dev->attr.attr); |
203d3d4a ZR |
1193 | dev->attr.attr.name = dev->attr_name; |
1194 | dev->attr.attr.mode = 0444; | |
1195 | dev->attr.show = thermal_cooling_device_trip_point_show; | |
1196 | result = device_create_file(&tz->device, &dev->attr); | |
1197 | if (result) | |
1198 | goto remove_symbol_link; | |
1199 | ||
1200 | mutex_lock(&tz->lock); | |
f4a821ce | 1201 | mutex_lock(&cdev->lock); |
cddf31b3 | 1202 | list_for_each_entry(pos, &tz->thermal_instances, tz_node) |
203d3d4a ZR |
1203 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
1204 | result = -EEXIST; | |
1205 | break; | |
1206 | } | |
b5e4ae62 | 1207 | if (!result) { |
cddf31b3 | 1208 | list_add_tail(&dev->tz_node, &tz->thermal_instances); |
b5e4ae62 ZR |
1209 | list_add_tail(&dev->cdev_node, &cdev->thermal_instances); |
1210 | } | |
f4a821ce | 1211 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
1212 | mutex_unlock(&tz->lock); |
1213 | ||
1214 | if (!result) | |
1215 | return 0; | |
1216 | ||
1217 | device_remove_file(&tz->device, &dev->attr); | |
caca8b80 | 1218 | remove_symbol_link: |
203d3d4a | 1219 | sysfs_remove_link(&tz->device.kobj, dev->name); |
caca8b80 | 1220 | release_idr: |
203d3d4a | 1221 | release_idr(&tz->idr, &tz->lock, dev->id); |
caca8b80 | 1222 | free_mem: |
203d3d4a ZR |
1223 | kfree(dev); |
1224 | return result; | |
1225 | } | |
910cb1e3 | 1226 | EXPORT_SYMBOL_GPL(thermal_zone_bind_cooling_device); |
203d3d4a ZR |
1227 | |
1228 | /** | |
9892e5dc EV |
1229 | * thermal_zone_unbind_cooling_device() - unbind a cooling device from a |
1230 | * thermal zone. | |
1231 | * @tz: pointer to a struct thermal_zone_device. | |
203d3d4a ZR |
1232 | * @trip: indicates which trip point the cooling devices is |
1233 | * associated with in this thermal zone. | |
9892e5dc | 1234 | * @cdev: pointer to a struct thermal_cooling_device. |
543a9561 | 1235 | * |
9892e5dc EV |
1236 | * This interface function unbind a thermal cooling device from the certain |
1237 | * trip point of a thermal zone device. | |
543a9561 | 1238 | * This function is usually called in the thermal zone device .unbind callback. |
9892e5dc EV |
1239 | * |
1240 | * Return: 0 on success, the proper error value otherwise. | |
203d3d4a ZR |
1241 | */ |
1242 | int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz, | |
1243 | int trip, | |
1244 | struct thermal_cooling_device *cdev) | |
1245 | { | |
b81b6ba3 | 1246 | struct thermal_instance *pos, *next; |
203d3d4a ZR |
1247 | |
1248 | mutex_lock(&tz->lock); | |
f4a821ce | 1249 | mutex_lock(&cdev->lock); |
cddf31b3 | 1250 | list_for_each_entry_safe(pos, next, &tz->thermal_instances, tz_node) { |
543a9561 | 1251 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
cddf31b3 | 1252 | list_del(&pos->tz_node); |
b5e4ae62 | 1253 | list_del(&pos->cdev_node); |
f4a821ce | 1254 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
1255 | mutex_unlock(&tz->lock); |
1256 | goto unbind; | |
1257 | } | |
1258 | } | |
f4a821ce | 1259 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
1260 | mutex_unlock(&tz->lock); |
1261 | ||
1262 | return -ENODEV; | |
1263 | ||
caca8b80 | 1264 | unbind: |
203d3d4a ZR |
1265 | device_remove_file(&tz->device, &pos->attr); |
1266 | sysfs_remove_link(&tz->device.kobj, pos->name); | |
1267 | release_idr(&tz->idr, &tz->lock, pos->id); | |
1268 | kfree(pos); | |
1269 | return 0; | |
1270 | } | |
910cb1e3 | 1271 | EXPORT_SYMBOL_GPL(thermal_zone_unbind_cooling_device); |
203d3d4a ZR |
1272 | |
1273 | static void thermal_release(struct device *dev) | |
1274 | { | |
1275 | struct thermal_zone_device *tz; | |
1276 | struct thermal_cooling_device *cdev; | |
1277 | ||
caca8b80 JP |
1278 | if (!strncmp(dev_name(dev), "thermal_zone", |
1279 | sizeof("thermal_zone") - 1)) { | |
203d3d4a ZR |
1280 | tz = to_thermal_zone(dev); |
1281 | kfree(tz); | |
1282 | } else { | |
1283 | cdev = to_cooling_device(dev); | |
1284 | kfree(cdev); | |
1285 | } | |
1286 | } | |
1287 | ||
1288 | static struct class thermal_class = { | |
1289 | .name = "thermal", | |
1290 | .dev_release = thermal_release, | |
1291 | }; | |
1292 | ||
1293 | /** | |
3a6eccb3 | 1294 | * thermal_cooling_device_register() - register a new thermal cooling device |
203d3d4a ZR |
1295 | * @type: the thermal cooling device type. |
1296 | * @devdata: device private data. | |
1297 | * @ops: standard thermal cooling devices callbacks. | |
3a6eccb3 EV |
1298 | * |
1299 | * This interface function adds a new thermal cooling device (fan/processor/...) | |
1300 | * to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself | |
1301 | * to all the thermal zone devices registered at the same time. | |
1302 | * | |
1303 | * Return: a pointer to the created struct thermal_cooling_device or an | |
1304 | * ERR_PTR. Caller must check return value with IS_ERR*() helpers. | |
203d3d4a | 1305 | */ |
caca8b80 JP |
1306 | struct thermal_cooling_device * |
1307 | thermal_cooling_device_register(char *type, void *devdata, | |
1308 | const struct thermal_cooling_device_ops *ops) | |
203d3d4a ZR |
1309 | { |
1310 | struct thermal_cooling_device *cdev; | |
203d3d4a ZR |
1311 | int result; |
1312 | ||
204dd1d3 | 1313 | if (type && strlen(type) >= THERMAL_NAME_LENGTH) |
3e6fda5c | 1314 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1315 | |
1316 | if (!ops || !ops->get_max_state || !ops->get_cur_state || | |
543a9561 | 1317 | !ops->set_cur_state) |
3e6fda5c | 1318 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1319 | |
1320 | cdev = kzalloc(sizeof(struct thermal_cooling_device), GFP_KERNEL); | |
1321 | if (!cdev) | |
3e6fda5c | 1322 | return ERR_PTR(-ENOMEM); |
203d3d4a ZR |
1323 | |
1324 | result = get_idr(&thermal_cdev_idr, &thermal_idr_lock, &cdev->id); | |
1325 | if (result) { | |
1326 | kfree(cdev); | |
3e6fda5c | 1327 | return ERR_PTR(result); |
203d3d4a ZR |
1328 | } |
1329 | ||
c7a8b9d9 | 1330 | strlcpy(cdev->type, type ? : "", sizeof(cdev->type)); |
f4a821ce | 1331 | mutex_init(&cdev->lock); |
b5e4ae62 | 1332 | INIT_LIST_HEAD(&cdev->thermal_instances); |
203d3d4a | 1333 | cdev->ops = ops; |
ce119f83 | 1334 | cdev->updated = true; |
203d3d4a ZR |
1335 | cdev->device.class = &thermal_class; |
1336 | cdev->devdata = devdata; | |
354655ea | 1337 | dev_set_name(&cdev->device, "cooling_device%d", cdev->id); |
203d3d4a ZR |
1338 | result = device_register(&cdev->device); |
1339 | if (result) { | |
1340 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
1341 | kfree(cdev); | |
3e6fda5c | 1342 | return ERR_PTR(result); |
203d3d4a ZR |
1343 | } |
1344 | ||
1345 | /* sys I/F */ | |
1346 | if (type) { | |
543a9561 | 1347 | result = device_create_file(&cdev->device, &dev_attr_cdev_type); |
203d3d4a ZR |
1348 | if (result) |
1349 | goto unregister; | |
1350 | } | |
1351 | ||
1352 | result = device_create_file(&cdev->device, &dev_attr_max_state); | |
1353 | if (result) | |
1354 | goto unregister; | |
1355 | ||
1356 | result = device_create_file(&cdev->device, &dev_attr_cur_state); | |
1357 | if (result) | |
1358 | goto unregister; | |
1359 | ||
7e8ee1e9 | 1360 | /* Add 'this' new cdev to the global cdev list */ |
203d3d4a ZR |
1361 | mutex_lock(&thermal_list_lock); |
1362 | list_add(&cdev->node, &thermal_cdev_list); | |
203d3d4a ZR |
1363 | mutex_unlock(&thermal_list_lock); |
1364 | ||
7e8ee1e9 D |
1365 | /* Update binding information for 'this' new cdev */ |
1366 | bind_cdev(cdev); | |
1367 | ||
1368 | return cdev; | |
203d3d4a | 1369 | |
caca8b80 | 1370 | unregister: |
203d3d4a ZR |
1371 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); |
1372 | device_unregister(&cdev->device); | |
3e6fda5c | 1373 | return ERR_PTR(result); |
203d3d4a | 1374 | } |
910cb1e3 | 1375 | EXPORT_SYMBOL_GPL(thermal_cooling_device_register); |
203d3d4a ZR |
1376 | |
1377 | /** | |
1378 | * thermal_cooling_device_unregister - removes the registered thermal cooling device | |
203d3d4a ZR |
1379 | * @cdev: the thermal cooling device to remove. |
1380 | * | |
1381 | * thermal_cooling_device_unregister() must be called when the device is no | |
1382 | * longer needed. | |
1383 | */ | |
7e8ee1e9 | 1384 | void thermal_cooling_device_unregister(struct thermal_cooling_device *cdev) |
203d3d4a | 1385 | { |
7e8ee1e9 D |
1386 | int i; |
1387 | const struct thermal_zone_params *tzp; | |
203d3d4a ZR |
1388 | struct thermal_zone_device *tz; |
1389 | struct thermal_cooling_device *pos = NULL; | |
1390 | ||
1391 | if (!cdev) | |
1392 | return; | |
1393 | ||
1394 | mutex_lock(&thermal_list_lock); | |
1395 | list_for_each_entry(pos, &thermal_cdev_list, node) | |
1396 | if (pos == cdev) | |
1397 | break; | |
1398 | if (pos != cdev) { | |
1399 | /* thermal cooling device not found */ | |
1400 | mutex_unlock(&thermal_list_lock); | |
1401 | return; | |
1402 | } | |
1403 | list_del(&cdev->node); | |
7e8ee1e9 D |
1404 | |
1405 | /* Unbind all thermal zones associated with 'this' cdev */ | |
203d3d4a | 1406 | list_for_each_entry(tz, &thermal_tz_list, node) { |
7e8ee1e9 D |
1407 | if (tz->ops->unbind) { |
1408 | tz->ops->unbind(tz, cdev); | |
1409 | continue; | |
1410 | } | |
1411 | ||
1412 | if (!tz->tzp || !tz->tzp->tbp) | |
203d3d4a | 1413 | continue; |
7e8ee1e9 D |
1414 | |
1415 | tzp = tz->tzp; | |
1416 | for (i = 0; i < tzp->num_tbps; i++) { | |
1417 | if (tzp->tbp[i].cdev == cdev) { | |
1418 | __unbind(tz, tzp->tbp[i].trip_mask, cdev); | |
1419 | tzp->tbp[i].cdev = NULL; | |
1420 | } | |
1421 | } | |
203d3d4a | 1422 | } |
7e8ee1e9 | 1423 | |
203d3d4a | 1424 | mutex_unlock(&thermal_list_lock); |
7e8ee1e9 | 1425 | |
203d3d4a | 1426 | if (cdev->type[0]) |
543a9561 | 1427 | device_remove_file(&cdev->device, &dev_attr_cdev_type); |
203d3d4a ZR |
1428 | device_remove_file(&cdev->device, &dev_attr_max_state); |
1429 | device_remove_file(&cdev->device, &dev_attr_cur_state); | |
1430 | ||
1431 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
1432 | device_unregister(&cdev->device); | |
1433 | return; | |
1434 | } | |
910cb1e3 | 1435 | EXPORT_SYMBOL_GPL(thermal_cooling_device_unregister); |
203d3d4a | 1436 | |
dc765482 | 1437 | void thermal_cdev_update(struct thermal_cooling_device *cdev) |
ce119f83 ZR |
1438 | { |
1439 | struct thermal_instance *instance; | |
1440 | unsigned long target = 0; | |
1441 | ||
1442 | /* cooling device is updated*/ | |
1443 | if (cdev->updated) | |
1444 | return; | |
1445 | ||
f4a821ce | 1446 | mutex_lock(&cdev->lock); |
ce119f83 ZR |
1447 | /* Make sure cdev enters the deepest cooling state */ |
1448 | list_for_each_entry(instance, &cdev->thermal_instances, cdev_node) { | |
1449 | if (instance->target == THERMAL_NO_TARGET) | |
1450 | continue; | |
1451 | if (instance->target > target) | |
1452 | target = instance->target; | |
1453 | } | |
f4a821ce | 1454 | mutex_unlock(&cdev->lock); |
ce119f83 ZR |
1455 | cdev->ops->set_cur_state(cdev, target); |
1456 | cdev->updated = true; | |
1457 | } | |
dc765482 | 1458 | EXPORT_SYMBOL(thermal_cdev_update); |
ce119f83 | 1459 | |
f2b4caaf | 1460 | /** |
7b73c993 | 1461 | * thermal_notify_framework - Sensor drivers use this API to notify framework |
f2b4caaf D |
1462 | * @tz: thermal zone device |
1463 | * @trip: indicates which trip point has been crossed | |
1464 | * | |
1465 | * This function handles the trip events from sensor drivers. It starts | |
1466 | * throttling the cooling devices according to the policy configured. | |
1467 | * For CRITICAL and HOT trip points, this notifies the respective drivers, | |
1468 | * and does actual throttling for other trip points i.e ACTIVE and PASSIVE. | |
1469 | * The throttling policy is based on the configured platform data; if no | |
1470 | * platform data is provided, this uses the step_wise throttling policy. | |
1471 | */ | |
7b73c993 | 1472 | void thermal_notify_framework(struct thermal_zone_device *tz, int trip) |
f2b4caaf D |
1473 | { |
1474 | handle_thermal_trip(tz, trip); | |
1475 | } | |
910cb1e3 | 1476 | EXPORT_SYMBOL_GPL(thermal_notify_framework); |
f2b4caaf | 1477 | |
c56f5c03 | 1478 | /** |
269c174f | 1479 | * create_trip_attrs() - create attributes for trip points |
c56f5c03 D |
1480 | * @tz: the thermal zone device |
1481 | * @mask: Writeable trip point bitmap. | |
269c174f EV |
1482 | * |
1483 | * helper function to instantiate sysfs entries for every trip | |
1484 | * point and its properties of a struct thermal_zone_device. | |
1485 | * | |
1486 | * Return: 0 on success, the proper error value otherwise. | |
c56f5c03 D |
1487 | */ |
1488 | static int create_trip_attrs(struct thermal_zone_device *tz, int mask) | |
1489 | { | |
1490 | int indx; | |
27365a6c | 1491 | int size = sizeof(struct thermal_attr) * tz->trips; |
c56f5c03 | 1492 | |
27365a6c | 1493 | tz->trip_type_attrs = kzalloc(size, GFP_KERNEL); |
c56f5c03 D |
1494 | if (!tz->trip_type_attrs) |
1495 | return -ENOMEM; | |
1496 | ||
27365a6c | 1497 | tz->trip_temp_attrs = kzalloc(size, GFP_KERNEL); |
c56f5c03 D |
1498 | if (!tz->trip_temp_attrs) { |
1499 | kfree(tz->trip_type_attrs); | |
1500 | return -ENOMEM; | |
1501 | } | |
1502 | ||
27365a6c D |
1503 | if (tz->ops->get_trip_hyst) { |
1504 | tz->trip_hyst_attrs = kzalloc(size, GFP_KERNEL); | |
1505 | if (!tz->trip_hyst_attrs) { | |
1506 | kfree(tz->trip_type_attrs); | |
1507 | kfree(tz->trip_temp_attrs); | |
1508 | return -ENOMEM; | |
1509 | } | |
1510 | } | |
c56f5c03 | 1511 | |
27365a6c D |
1512 | |
1513 | for (indx = 0; indx < tz->trips; indx++) { | |
c56f5c03 D |
1514 | /* create trip type attribute */ |
1515 | snprintf(tz->trip_type_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1516 | "trip_point_%d_type", indx); | |
1517 | ||
1518 | sysfs_attr_init(&tz->trip_type_attrs[indx].attr.attr); | |
1519 | tz->trip_type_attrs[indx].attr.attr.name = | |
1520 | tz->trip_type_attrs[indx].name; | |
1521 | tz->trip_type_attrs[indx].attr.attr.mode = S_IRUGO; | |
1522 | tz->trip_type_attrs[indx].attr.show = trip_point_type_show; | |
1523 | ||
1524 | device_create_file(&tz->device, | |
1525 | &tz->trip_type_attrs[indx].attr); | |
1526 | ||
1527 | /* create trip temp attribute */ | |
1528 | snprintf(tz->trip_temp_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1529 | "trip_point_%d_temp", indx); | |
1530 | ||
1531 | sysfs_attr_init(&tz->trip_temp_attrs[indx].attr.attr); | |
1532 | tz->trip_temp_attrs[indx].attr.attr.name = | |
1533 | tz->trip_temp_attrs[indx].name; | |
1534 | tz->trip_temp_attrs[indx].attr.attr.mode = S_IRUGO; | |
1535 | tz->trip_temp_attrs[indx].attr.show = trip_point_temp_show; | |
1536 | if (mask & (1 << indx)) { | |
1537 | tz->trip_temp_attrs[indx].attr.attr.mode |= S_IWUSR; | |
1538 | tz->trip_temp_attrs[indx].attr.store = | |
1539 | trip_point_temp_store; | |
1540 | } | |
1541 | ||
1542 | device_create_file(&tz->device, | |
1543 | &tz->trip_temp_attrs[indx].attr); | |
27365a6c D |
1544 | |
1545 | /* create Optional trip hyst attribute */ | |
1546 | if (!tz->ops->get_trip_hyst) | |
1547 | continue; | |
1548 | snprintf(tz->trip_hyst_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1549 | "trip_point_%d_hyst", indx); | |
1550 | ||
1551 | sysfs_attr_init(&tz->trip_hyst_attrs[indx].attr.attr); | |
1552 | tz->trip_hyst_attrs[indx].attr.attr.name = | |
1553 | tz->trip_hyst_attrs[indx].name; | |
1554 | tz->trip_hyst_attrs[indx].attr.attr.mode = S_IRUGO; | |
1555 | tz->trip_hyst_attrs[indx].attr.show = trip_point_hyst_show; | |
1556 | if (tz->ops->set_trip_hyst) { | |
1557 | tz->trip_hyst_attrs[indx].attr.attr.mode |= S_IWUSR; | |
1558 | tz->trip_hyst_attrs[indx].attr.store = | |
1559 | trip_point_hyst_store; | |
1560 | } | |
1561 | ||
1562 | device_create_file(&tz->device, | |
1563 | &tz->trip_hyst_attrs[indx].attr); | |
c56f5c03 D |
1564 | } |
1565 | return 0; | |
1566 | } | |
1567 | ||
1568 | static void remove_trip_attrs(struct thermal_zone_device *tz) | |
1569 | { | |
1570 | int indx; | |
1571 | ||
1572 | for (indx = 0; indx < tz->trips; indx++) { | |
1573 | device_remove_file(&tz->device, | |
1574 | &tz->trip_type_attrs[indx].attr); | |
1575 | device_remove_file(&tz->device, | |
1576 | &tz->trip_temp_attrs[indx].attr); | |
27365a6c D |
1577 | if (tz->ops->get_trip_hyst) |
1578 | device_remove_file(&tz->device, | |
1579 | &tz->trip_hyst_attrs[indx].attr); | |
c56f5c03 D |
1580 | } |
1581 | kfree(tz->trip_type_attrs); | |
1582 | kfree(tz->trip_temp_attrs); | |
27365a6c | 1583 | kfree(tz->trip_hyst_attrs); |
c56f5c03 D |
1584 | } |
1585 | ||
203d3d4a | 1586 | /** |
a00e55f9 | 1587 | * thermal_zone_device_register() - register a new thermal zone device |
203d3d4a ZR |
1588 | * @type: the thermal zone device type |
1589 | * @trips: the number of trip points the thermal zone support | |
c56f5c03 | 1590 | * @mask: a bit string indicating the writeablility of trip points |
203d3d4a ZR |
1591 | * @devdata: private device data |
1592 | * @ops: standard thermal zone device callbacks | |
50125a9b | 1593 | * @tzp: thermal zone platform parameters |
b1569e99 MG |
1594 | * @passive_delay: number of milliseconds to wait between polls when |
1595 | * performing passive cooling | |
1596 | * @polling_delay: number of milliseconds to wait between polls when checking | |
1597 | * whether trip points have been crossed (0 for interrupt | |
1598 | * driven systems) | |
203d3d4a | 1599 | * |
a00e55f9 EV |
1600 | * This interface function adds a new thermal zone device (sensor) to |
1601 | * /sys/class/thermal folder as thermal_zone[0-*]. It tries to bind all the | |
1602 | * thermal cooling devices registered at the same time. | |
203d3d4a | 1603 | * thermal_zone_device_unregister() must be called when the device is no |
1b7ddb84 | 1604 | * longer needed. The passive cooling depends on the .get_trend() return value. |
a00e55f9 EV |
1605 | * |
1606 | * Return: a pointer to the created struct thermal_zone_device or an | |
1607 | * in case of error, an ERR_PTR. Caller must check return value with | |
1608 | * IS_ERR*() helpers. | |
203d3d4a | 1609 | */ |
4b1bf587 | 1610 | struct thermal_zone_device *thermal_zone_device_register(const char *type, |
c56f5c03 | 1611 | int trips, int mask, void *devdata, |
5b275ce2 | 1612 | const struct thermal_zone_device_ops *ops, |
50125a9b | 1613 | const struct thermal_zone_params *tzp, |
1b7ddb84 | 1614 | int passive_delay, int polling_delay) |
203d3d4a ZR |
1615 | { |
1616 | struct thermal_zone_device *tz; | |
03a971a2 | 1617 | enum thermal_trip_type trip_type; |
203d3d4a ZR |
1618 | int result; |
1619 | int count; | |
03a971a2 | 1620 | int passive = 0; |
203d3d4a | 1621 | |
204dd1d3 | 1622 | if (type && strlen(type) >= THERMAL_NAME_LENGTH) |
3e6fda5c | 1623 | return ERR_PTR(-EINVAL); |
203d3d4a | 1624 | |
c56f5c03 | 1625 | if (trips > THERMAL_MAX_TRIPS || trips < 0 || mask >> trips) |
3e6fda5c | 1626 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1627 | |
1628 | if (!ops || !ops->get_temp) | |
3e6fda5c | 1629 | return ERR_PTR(-EINVAL); |
203d3d4a | 1630 | |
6b2aa51d EV |
1631 | if (trips > 0 && !ops->get_trip_type) |
1632 | return ERR_PTR(-EINVAL); | |
1633 | ||
203d3d4a ZR |
1634 | tz = kzalloc(sizeof(struct thermal_zone_device), GFP_KERNEL); |
1635 | if (!tz) | |
3e6fda5c | 1636 | return ERR_PTR(-ENOMEM); |
203d3d4a | 1637 | |
2d374139 | 1638 | INIT_LIST_HEAD(&tz->thermal_instances); |
203d3d4a ZR |
1639 | idr_init(&tz->idr); |
1640 | mutex_init(&tz->lock); | |
1641 | result = get_idr(&thermal_tz_idr, &thermal_idr_lock, &tz->id); | |
1642 | if (result) { | |
1643 | kfree(tz); | |
3e6fda5c | 1644 | return ERR_PTR(result); |
203d3d4a ZR |
1645 | } |
1646 | ||
c7a8b9d9 | 1647 | strlcpy(tz->type, type ? : "", sizeof(tz->type)); |
203d3d4a | 1648 | tz->ops = ops; |
50125a9b | 1649 | tz->tzp = tzp; |
203d3d4a ZR |
1650 | tz->device.class = &thermal_class; |
1651 | tz->devdata = devdata; | |
1652 | tz->trips = trips; | |
b1569e99 MG |
1653 | tz->passive_delay = passive_delay; |
1654 | tz->polling_delay = polling_delay; | |
1655 | ||
354655ea | 1656 | dev_set_name(&tz->device, "thermal_zone%d", tz->id); |
203d3d4a ZR |
1657 | result = device_register(&tz->device); |
1658 | if (result) { | |
1659 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); | |
1660 | kfree(tz); | |
3e6fda5c | 1661 | return ERR_PTR(result); |
203d3d4a ZR |
1662 | } |
1663 | ||
1664 | /* sys I/F */ | |
1665 | if (type) { | |
1666 | result = device_create_file(&tz->device, &dev_attr_type); | |
1667 | if (result) | |
1668 | goto unregister; | |
1669 | } | |
1670 | ||
1671 | result = device_create_file(&tz->device, &dev_attr_temp); | |
1672 | if (result) | |
1673 | goto unregister; | |
1674 | ||
1675 | if (ops->get_mode) { | |
1676 | result = device_create_file(&tz->device, &dev_attr_mode); | |
1677 | if (result) | |
1678 | goto unregister; | |
1679 | } | |
1680 | ||
c56f5c03 D |
1681 | result = create_trip_attrs(tz, mask); |
1682 | if (result) | |
1683 | goto unregister; | |
1684 | ||
203d3d4a | 1685 | for (count = 0; count < trips; count++) { |
03a971a2 MG |
1686 | tz->ops->get_trip_type(tz, count, &trip_type); |
1687 | if (trip_type == THERMAL_TRIP_PASSIVE) | |
1688 | passive = 1; | |
203d3d4a ZR |
1689 | } |
1690 | ||
5a2c090b D |
1691 | if (!passive) { |
1692 | result = device_create_file(&tz->device, &dev_attr_passive); | |
1693 | if (result) | |
1694 | goto unregister; | |
1695 | } | |
03a971a2 | 1696 | |
e6e238c3 ADK |
1697 | #ifdef CONFIG_THERMAL_EMULATION |
1698 | result = device_create_file(&tz->device, &dev_attr_emul_temp); | |
1699 | if (result) | |
1700 | goto unregister; | |
1701 | #endif | |
5a2c090b D |
1702 | /* Create policy attribute */ |
1703 | result = device_create_file(&tz->device, &dev_attr_policy); | |
03a971a2 MG |
1704 | if (result) |
1705 | goto unregister; | |
1706 | ||
a4a15485 D |
1707 | /* Update 'this' zone's governor information */ |
1708 | mutex_lock(&thermal_governor_lock); | |
1709 | ||
1710 | if (tz->tzp) | |
1711 | tz->governor = __find_governor(tz->tzp->governor_name); | |
1712 | else | |
1713 | tz->governor = __find_governor(DEFAULT_THERMAL_GOVERNOR); | |
1714 | ||
1715 | mutex_unlock(&thermal_governor_lock); | |
1716 | ||
e68b16ab ZR |
1717 | result = thermal_add_hwmon_sysfs(tz); |
1718 | if (result) | |
1719 | goto unregister; | |
1720 | ||
203d3d4a ZR |
1721 | mutex_lock(&thermal_list_lock); |
1722 | list_add_tail(&tz->node, &thermal_tz_list); | |
203d3d4a ZR |
1723 | mutex_unlock(&thermal_list_lock); |
1724 | ||
7e8ee1e9 D |
1725 | /* Bind cooling devices for this zone */ |
1726 | bind_tz(tz); | |
1727 | ||
b1569e99 MG |
1728 | INIT_DELAYED_WORK(&(tz->poll_queue), thermal_zone_device_check); |
1729 | ||
1730 | thermal_zone_device_update(tz); | |
1731 | ||
203d3d4a ZR |
1732 | if (!result) |
1733 | return tz; | |
1734 | ||
caca8b80 | 1735 | unregister: |
203d3d4a ZR |
1736 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1737 | device_unregister(&tz->device); | |
3e6fda5c | 1738 | return ERR_PTR(result); |
203d3d4a | 1739 | } |
910cb1e3 | 1740 | EXPORT_SYMBOL_GPL(thermal_zone_device_register); |
203d3d4a ZR |
1741 | |
1742 | /** | |
1743 | * thermal_device_unregister - removes the registered thermal zone device | |
203d3d4a ZR |
1744 | * @tz: the thermal zone device to remove |
1745 | */ | |
1746 | void thermal_zone_device_unregister(struct thermal_zone_device *tz) | |
1747 | { | |
7e8ee1e9 D |
1748 | int i; |
1749 | const struct thermal_zone_params *tzp; | |
203d3d4a ZR |
1750 | struct thermal_cooling_device *cdev; |
1751 | struct thermal_zone_device *pos = NULL; | |
203d3d4a ZR |
1752 | |
1753 | if (!tz) | |
1754 | return; | |
1755 | ||
7e8ee1e9 D |
1756 | tzp = tz->tzp; |
1757 | ||
203d3d4a ZR |
1758 | mutex_lock(&thermal_list_lock); |
1759 | list_for_each_entry(pos, &thermal_tz_list, node) | |
1760 | if (pos == tz) | |
1761 | break; | |
1762 | if (pos != tz) { | |
1763 | /* thermal zone device not found */ | |
1764 | mutex_unlock(&thermal_list_lock); | |
1765 | return; | |
1766 | } | |
1767 | list_del(&tz->node); | |
7e8ee1e9 D |
1768 | |
1769 | /* Unbind all cdevs associated with 'this' thermal zone */ | |
1770 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
1771 | if (tz->ops->unbind) { | |
1772 | tz->ops->unbind(tz, cdev); | |
1773 | continue; | |
1774 | } | |
1775 | ||
1776 | if (!tzp || !tzp->tbp) | |
1777 | break; | |
1778 | ||
1779 | for (i = 0; i < tzp->num_tbps; i++) { | |
1780 | if (tzp->tbp[i].cdev == cdev) { | |
1781 | __unbind(tz, tzp->tbp[i].trip_mask, cdev); | |
1782 | tzp->tbp[i].cdev = NULL; | |
1783 | } | |
1784 | } | |
1785 | } | |
1786 | ||
203d3d4a ZR |
1787 | mutex_unlock(&thermal_list_lock); |
1788 | ||
b1569e99 MG |
1789 | thermal_zone_device_set_polling(tz, 0); |
1790 | ||
203d3d4a ZR |
1791 | if (tz->type[0]) |
1792 | device_remove_file(&tz->device, &dev_attr_type); | |
1793 | device_remove_file(&tz->device, &dev_attr_temp); | |
1794 | if (tz->ops->get_mode) | |
1795 | device_remove_file(&tz->device, &dev_attr_mode); | |
5a2c090b | 1796 | device_remove_file(&tz->device, &dev_attr_policy); |
c56f5c03 | 1797 | remove_trip_attrs(tz); |
a4a15485 | 1798 | tz->governor = NULL; |
203d3d4a | 1799 | |
e68b16ab | 1800 | thermal_remove_hwmon_sysfs(tz); |
203d3d4a ZR |
1801 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1802 | idr_destroy(&tz->idr); | |
1803 | mutex_destroy(&tz->lock); | |
1804 | device_unregister(&tz->device); | |
1805 | return; | |
1806 | } | |
910cb1e3 | 1807 | EXPORT_SYMBOL_GPL(thermal_zone_device_unregister); |
203d3d4a | 1808 | |
63c4d919 EV |
1809 | /** |
1810 | * thermal_zone_get_zone_by_name() - search for a zone and returns its ref | |
1811 | * @name: thermal zone name to fetch the temperature | |
1812 | * | |
1813 | * When only one zone is found with the passed name, returns a reference to it. | |
1814 | * | |
1815 | * Return: On success returns a reference to an unique thermal zone with | |
1816 | * matching name equals to @name, an ERR_PTR otherwise (-EINVAL for invalid | |
1817 | * paramenters, -ENODEV for not found and -EEXIST for multiple matches). | |
1818 | */ | |
1819 | struct thermal_zone_device *thermal_zone_get_zone_by_name(const char *name) | |
1820 | { | |
1821 | struct thermal_zone_device *pos = NULL, *ref = ERR_PTR(-EINVAL); | |
1822 | unsigned int found = 0; | |
1823 | ||
1824 | if (!name) | |
1825 | goto exit; | |
1826 | ||
1827 | mutex_lock(&thermal_list_lock); | |
1828 | list_for_each_entry(pos, &thermal_tz_list, node) | |
1829 | if (!strnicmp(name, pos->type, THERMAL_NAME_LENGTH)) { | |
1830 | found++; | |
1831 | ref = pos; | |
1832 | } | |
1833 | mutex_unlock(&thermal_list_lock); | |
1834 | ||
1835 | /* nothing has been found, thus an error code for it */ | |
1836 | if (found == 0) | |
1837 | ref = ERR_PTR(-ENODEV); | |
1838 | else if (found > 1) | |
1839 | /* Success only when an unique zone is found */ | |
1840 | ref = ERR_PTR(-EEXIST); | |
1841 | ||
1842 | exit: | |
1843 | return ref; | |
1844 | } | |
1845 | EXPORT_SYMBOL_GPL(thermal_zone_get_zone_by_name); | |
1846 | ||
af06216a RW |
1847 | #ifdef CONFIG_NET |
1848 | static struct genl_family thermal_event_genl_family = { | |
1849 | .id = GENL_ID_GENERATE, | |
1850 | .name = THERMAL_GENL_FAMILY_NAME, | |
1851 | .version = THERMAL_GENL_VERSION, | |
1852 | .maxattr = THERMAL_GENL_ATTR_MAX, | |
1853 | }; | |
1854 | ||
1855 | static struct genl_multicast_group thermal_event_mcgrp = { | |
1856 | .name = THERMAL_GENL_MCAST_GROUP_NAME, | |
1857 | }; | |
1858 | ||
8ab3e6a0 EV |
1859 | int thermal_generate_netlink_event(struct thermal_zone_device *tz, |
1860 | enum events event) | |
4cb18728 D |
1861 | { |
1862 | struct sk_buff *skb; | |
1863 | struct nlattr *attr; | |
1864 | struct thermal_genl_event *thermal_event; | |
1865 | void *msg_header; | |
1866 | int size; | |
1867 | int result; | |
b11de07c | 1868 | static unsigned int thermal_event_seqnum; |
4cb18728 | 1869 | |
8ab3e6a0 EV |
1870 | if (!tz) |
1871 | return -EINVAL; | |
1872 | ||
4cb18728 | 1873 | /* allocate memory */ |
886ee546 JP |
1874 | size = nla_total_size(sizeof(struct thermal_genl_event)) + |
1875 | nla_total_size(0); | |
4cb18728 D |
1876 | |
1877 | skb = genlmsg_new(size, GFP_ATOMIC); | |
1878 | if (!skb) | |
1879 | return -ENOMEM; | |
1880 | ||
1881 | /* add the genetlink message header */ | |
1882 | msg_header = genlmsg_put(skb, 0, thermal_event_seqnum++, | |
1883 | &thermal_event_genl_family, 0, | |
1884 | THERMAL_GENL_CMD_EVENT); | |
1885 | if (!msg_header) { | |
1886 | nlmsg_free(skb); | |
1887 | return -ENOMEM; | |
1888 | } | |
1889 | ||
1890 | /* fill the data */ | |
886ee546 JP |
1891 | attr = nla_reserve(skb, THERMAL_GENL_ATTR_EVENT, |
1892 | sizeof(struct thermal_genl_event)); | |
4cb18728 D |
1893 | |
1894 | if (!attr) { | |
1895 | nlmsg_free(skb); | |
1896 | return -EINVAL; | |
1897 | } | |
1898 | ||
1899 | thermal_event = nla_data(attr); | |
1900 | if (!thermal_event) { | |
1901 | nlmsg_free(skb); | |
1902 | return -EINVAL; | |
1903 | } | |
1904 | ||
1905 | memset(thermal_event, 0, sizeof(struct thermal_genl_event)); | |
1906 | ||
8ab3e6a0 | 1907 | thermal_event->orig = tz->id; |
4cb18728 D |
1908 | thermal_event->event = event; |
1909 | ||
1910 | /* send multicast genetlink message */ | |
1911 | result = genlmsg_end(skb, msg_header); | |
1912 | if (result < 0) { | |
1913 | nlmsg_free(skb); | |
1914 | return result; | |
1915 | } | |
1916 | ||
1917 | result = genlmsg_multicast(skb, 0, thermal_event_mcgrp.id, GFP_ATOMIC); | |
1918 | if (result) | |
923e0b1e | 1919 | dev_err(&tz->device, "Failed to send netlink event:%d", result); |
4cb18728 D |
1920 | |
1921 | return result; | |
1922 | } | |
910cb1e3 | 1923 | EXPORT_SYMBOL_GPL(thermal_generate_netlink_event); |
4cb18728 D |
1924 | |
1925 | static int genetlink_init(void) | |
1926 | { | |
1927 | int result; | |
1928 | ||
1929 | result = genl_register_family(&thermal_event_genl_family); | |
1930 | if (result) | |
1931 | return result; | |
1932 | ||
1933 | result = genl_register_mc_group(&thermal_event_genl_family, | |
1934 | &thermal_event_mcgrp); | |
1935 | if (result) | |
1936 | genl_unregister_family(&thermal_event_genl_family); | |
1937 | return result; | |
1938 | } | |
1939 | ||
af06216a RW |
1940 | static void genetlink_exit(void) |
1941 | { | |
1942 | genl_unregister_family(&thermal_event_genl_family); | |
1943 | } | |
1944 | #else /* !CONFIG_NET */ | |
1945 | static inline int genetlink_init(void) { return 0; } | |
1946 | static inline void genetlink_exit(void) {} | |
1947 | #endif /* !CONFIG_NET */ | |
1948 | ||
80a26a5c ZR |
1949 | static int __init thermal_register_governors(void) |
1950 | { | |
1951 | int result; | |
1952 | ||
1953 | result = thermal_gov_step_wise_register(); | |
1954 | if (result) | |
1955 | return result; | |
1956 | ||
1957 | result = thermal_gov_fair_share_register(); | |
1958 | if (result) | |
1959 | return result; | |
1960 | ||
1961 | return thermal_gov_user_space_register(); | |
1962 | } | |
1963 | ||
1964 | static void thermal_unregister_governors(void) | |
1965 | { | |
1966 | thermal_gov_step_wise_unregister(); | |
1967 | thermal_gov_fair_share_unregister(); | |
1968 | thermal_gov_user_space_unregister(); | |
1969 | } | |
1970 | ||
203d3d4a ZR |
1971 | static int __init thermal_init(void) |
1972 | { | |
80a26a5c ZR |
1973 | int result; |
1974 | ||
1975 | result = thermal_register_governors(); | |
1976 | if (result) | |
1977 | goto error; | |
203d3d4a ZR |
1978 | |
1979 | result = class_register(&thermal_class); | |
80a26a5c ZR |
1980 | if (result) |
1981 | goto unregister_governors; | |
1982 | ||
4cb18728 | 1983 | result = genetlink_init(); |
80a26a5c ZR |
1984 | if (result) |
1985 | goto unregister_class; | |
1986 | ||
1987 | return 0; | |
1988 | ||
1989 | unregister_governors: | |
1990 | thermal_unregister_governors(); | |
1991 | unregister_class: | |
1992 | class_unregister(&thermal_class); | |
1993 | error: | |
1994 | idr_destroy(&thermal_tz_idr); | |
1995 | idr_destroy(&thermal_cdev_idr); | |
1996 | mutex_destroy(&thermal_idr_lock); | |
1997 | mutex_destroy(&thermal_list_lock); | |
1998 | mutex_destroy(&thermal_governor_lock); | |
203d3d4a ZR |
1999 | return result; |
2000 | } | |
2001 | ||
2002 | static void __exit thermal_exit(void) | |
2003 | { | |
80a26a5c | 2004 | genetlink_exit(); |
203d3d4a | 2005 | class_unregister(&thermal_class); |
80a26a5c | 2006 | thermal_unregister_governors(); |
203d3d4a ZR |
2007 | idr_destroy(&thermal_tz_idr); |
2008 | idr_destroy(&thermal_cdev_idr); | |
2009 | mutex_destroy(&thermal_idr_lock); | |
2010 | mutex_destroy(&thermal_list_lock); | |
80a26a5c | 2011 | mutex_destroy(&thermal_governor_lock); |
203d3d4a ZR |
2012 | } |
2013 | ||
4cb18728 | 2014 | fs_initcall(thermal_init); |
203d3d4a | 2015 | module_exit(thermal_exit); |