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 | ||
0c872507 EV |
159 | if (tz->emul_temperature || !tz->ops->get_trend || |
160 | tz->ops->get_trend(tz, trip, &trend)) { | |
9b4298a0 D |
161 | if (tz->temperature > tz->last_temperature) |
162 | trend = THERMAL_TREND_RAISING; | |
163 | else if (tz->temperature < tz->last_temperature) | |
164 | trend = THERMAL_TREND_DROPPING; | |
165 | else | |
166 | trend = THERMAL_TREND_STABLE; | |
167 | } | |
168 | ||
169 | return trend; | |
170 | } | |
171 | EXPORT_SYMBOL(get_tz_trend); | |
172 | ||
173 | struct thermal_instance *get_thermal_instance(struct thermal_zone_device *tz, | |
174 | struct thermal_cooling_device *cdev, int trip) | |
175 | { | |
176 | struct thermal_instance *pos = NULL; | |
177 | struct thermal_instance *target_instance = NULL; | |
178 | ||
179 | mutex_lock(&tz->lock); | |
180 | mutex_lock(&cdev->lock); | |
181 | ||
182 | list_for_each_entry(pos, &tz->thermal_instances, tz_node) { | |
183 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { | |
184 | target_instance = pos; | |
185 | break; | |
186 | } | |
187 | } | |
188 | ||
189 | mutex_unlock(&cdev->lock); | |
190 | mutex_unlock(&tz->lock); | |
191 | ||
192 | return target_instance; | |
193 | } | |
194 | EXPORT_SYMBOL(get_thermal_instance); | |
195 | ||
7e8ee1e9 D |
196 | static void print_bind_err_msg(struct thermal_zone_device *tz, |
197 | struct thermal_cooling_device *cdev, int ret) | |
198 | { | |
199 | dev_err(&tz->device, "binding zone %s with cdev %s failed:%d\n", | |
200 | tz->type, cdev->type, ret); | |
201 | } | |
202 | ||
203 | static void __bind(struct thermal_zone_device *tz, int mask, | |
204 | struct thermal_cooling_device *cdev) | |
205 | { | |
206 | int i, ret; | |
207 | ||
208 | for (i = 0; i < tz->trips; i++) { | |
209 | if (mask & (1 << i)) { | |
210 | ret = thermal_zone_bind_cooling_device(tz, i, cdev, | |
211 | THERMAL_NO_LIMIT, THERMAL_NO_LIMIT); | |
212 | if (ret) | |
213 | print_bind_err_msg(tz, cdev, ret); | |
214 | } | |
215 | } | |
216 | } | |
217 | ||
218 | static void __unbind(struct thermal_zone_device *tz, int mask, | |
219 | struct thermal_cooling_device *cdev) | |
220 | { | |
221 | int i; | |
222 | ||
223 | for (i = 0; i < tz->trips; i++) | |
224 | if (mask & (1 << i)) | |
225 | thermal_zone_unbind_cooling_device(tz, i, cdev); | |
226 | } | |
227 | ||
228 | static void bind_cdev(struct thermal_cooling_device *cdev) | |
229 | { | |
230 | int i, ret; | |
231 | const struct thermal_zone_params *tzp; | |
232 | struct thermal_zone_device *pos = NULL; | |
233 | ||
234 | mutex_lock(&thermal_list_lock); | |
235 | ||
236 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
237 | if (!pos->tzp && !pos->ops->bind) | |
238 | continue; | |
239 | ||
240 | if (!pos->tzp && pos->ops->bind) { | |
241 | ret = pos->ops->bind(pos, cdev); | |
242 | if (ret) | |
243 | print_bind_err_msg(pos, cdev, ret); | |
244 | } | |
245 | ||
246 | tzp = pos->tzp; | |
791700cd HD |
247 | if (!tzp || !tzp->tbp) |
248 | continue; | |
7e8ee1e9 D |
249 | |
250 | for (i = 0; i < tzp->num_tbps; i++) { | |
251 | if (tzp->tbp[i].cdev || !tzp->tbp[i].match) | |
252 | continue; | |
253 | if (tzp->tbp[i].match(pos, cdev)) | |
254 | continue; | |
255 | tzp->tbp[i].cdev = cdev; | |
256 | __bind(pos, tzp->tbp[i].trip_mask, cdev); | |
257 | } | |
258 | } | |
259 | ||
260 | mutex_unlock(&thermal_list_lock); | |
261 | } | |
262 | ||
263 | static void bind_tz(struct thermal_zone_device *tz) | |
264 | { | |
265 | int i, ret; | |
266 | struct thermal_cooling_device *pos = NULL; | |
267 | const struct thermal_zone_params *tzp = tz->tzp; | |
268 | ||
269 | if (!tzp && !tz->ops->bind) | |
270 | return; | |
271 | ||
272 | mutex_lock(&thermal_list_lock); | |
273 | ||
274 | /* If there is no platform data, try to use ops->bind */ | |
275 | if (!tzp && tz->ops->bind) { | |
276 | list_for_each_entry(pos, &thermal_cdev_list, node) { | |
277 | ret = tz->ops->bind(tz, pos); | |
278 | if (ret) | |
279 | print_bind_err_msg(tz, pos, ret); | |
280 | } | |
281 | goto exit; | |
282 | } | |
283 | ||
791700cd | 284 | if (!tzp || !tzp->tbp) |
7e8ee1e9 D |
285 | goto exit; |
286 | ||
287 | list_for_each_entry(pos, &thermal_cdev_list, node) { | |
288 | for (i = 0; i < tzp->num_tbps; i++) { | |
289 | if (tzp->tbp[i].cdev || !tzp->tbp[i].match) | |
290 | continue; | |
291 | if (tzp->tbp[i].match(tz, pos)) | |
292 | continue; | |
293 | tzp->tbp[i].cdev = pos; | |
294 | __bind(tz, tzp->tbp[i].trip_mask, pos); | |
295 | } | |
296 | } | |
297 | exit: | |
298 | mutex_unlock(&thermal_list_lock); | |
299 | } | |
300 | ||
0c01ebbf D |
301 | static void thermal_zone_device_set_polling(struct thermal_zone_device *tz, |
302 | int delay) | |
303 | { | |
304 | if (delay > 1000) | |
305 | mod_delayed_work(system_freezable_wq, &tz->poll_queue, | |
306 | round_jiffies(msecs_to_jiffies(delay))); | |
307 | else if (delay) | |
308 | mod_delayed_work(system_freezable_wq, &tz->poll_queue, | |
309 | msecs_to_jiffies(delay)); | |
310 | else | |
311 | cancel_delayed_work(&tz->poll_queue); | |
312 | } | |
313 | ||
314 | static void monitor_thermal_zone(struct thermal_zone_device *tz) | |
315 | { | |
316 | mutex_lock(&tz->lock); | |
317 | ||
318 | if (tz->passive) | |
319 | thermal_zone_device_set_polling(tz, tz->passive_delay); | |
320 | else if (tz->polling_delay) | |
321 | thermal_zone_device_set_polling(tz, tz->polling_delay); | |
322 | else | |
323 | thermal_zone_device_set_polling(tz, 0); | |
324 | ||
325 | mutex_unlock(&tz->lock); | |
326 | } | |
327 | ||
328 | static void handle_non_critical_trips(struct thermal_zone_device *tz, | |
329 | int trip, enum thermal_trip_type trip_type) | |
330 | { | |
d567c686 ZR |
331 | if (tz->governor) |
332 | tz->governor->throttle(tz, trip); | |
0c01ebbf D |
333 | } |
334 | ||
335 | static void handle_critical_trips(struct thermal_zone_device *tz, | |
336 | int trip, enum thermal_trip_type trip_type) | |
337 | { | |
338 | long trip_temp; | |
339 | ||
340 | tz->ops->get_trip_temp(tz, trip, &trip_temp); | |
341 | ||
342 | /* If we have not crossed the trip_temp, we do not care. */ | |
343 | if (tz->temperature < trip_temp) | |
344 | return; | |
345 | ||
346 | if (tz->ops->notify) | |
347 | tz->ops->notify(tz, trip, trip_type); | |
348 | ||
349 | if (trip_type == THERMAL_TRIP_CRITICAL) { | |
923e0b1e EV |
350 | dev_emerg(&tz->device, |
351 | "critical temperature reached(%d C),shutting down\n", | |
352 | tz->temperature / 1000); | |
0c01ebbf D |
353 | orderly_poweroff(true); |
354 | } | |
355 | } | |
356 | ||
357 | static void handle_thermal_trip(struct thermal_zone_device *tz, int trip) | |
358 | { | |
359 | enum thermal_trip_type type; | |
360 | ||
361 | tz->ops->get_trip_type(tz, trip, &type); | |
362 | ||
363 | if (type == THERMAL_TRIP_CRITICAL || type == THERMAL_TRIP_HOT) | |
364 | handle_critical_trips(tz, trip, type); | |
365 | else | |
366 | handle_non_critical_trips(tz, trip, type); | |
367 | /* | |
368 | * Alright, we handled this trip successfully. | |
369 | * So, start monitoring again. | |
370 | */ | |
371 | monitor_thermal_zone(tz); | |
372 | } | |
373 | ||
837b26bb EV |
374 | /** |
375 | * thermal_zone_get_temp() - returns its the temperature of thermal zone | |
376 | * @tz: a valid pointer to a struct thermal_zone_device | |
377 | * @temp: a valid pointer to where to store the resulting temperature. | |
378 | * | |
379 | * When a valid thermal zone reference is passed, it will fetch its | |
380 | * temperature and fill @temp. | |
381 | * | |
382 | * Return: On success returns 0, an error code otherwise | |
383 | */ | |
384 | int thermal_zone_get_temp(struct thermal_zone_device *tz, unsigned long *temp) | |
e6e238c3 | 385 | { |
837b26bb | 386 | int ret = -EINVAL; |
5e20b2e5 ZR |
387 | #ifdef CONFIG_THERMAL_EMULATION |
388 | int count; | |
e6e238c3 ADK |
389 | unsigned long crit_temp = -1UL; |
390 | enum thermal_trip_type type; | |
5e20b2e5 | 391 | #endif |
e6e238c3 | 392 | |
9b19ec39 | 393 | if (!tz || IS_ERR(tz)) |
837b26bb EV |
394 | goto exit; |
395 | ||
e6e238c3 ADK |
396 | mutex_lock(&tz->lock); |
397 | ||
398 | ret = tz->ops->get_temp(tz, temp); | |
399 | #ifdef CONFIG_THERMAL_EMULATION | |
400 | if (!tz->emul_temperature) | |
401 | goto skip_emul; | |
402 | ||
403 | for (count = 0; count < tz->trips; count++) { | |
404 | ret = tz->ops->get_trip_type(tz, count, &type); | |
405 | if (!ret && type == THERMAL_TRIP_CRITICAL) { | |
406 | ret = tz->ops->get_trip_temp(tz, count, &crit_temp); | |
407 | break; | |
408 | } | |
409 | } | |
410 | ||
411 | if (ret) | |
412 | goto skip_emul; | |
413 | ||
414 | if (*temp < crit_temp) | |
415 | *temp = tz->emul_temperature; | |
416 | skip_emul: | |
417 | #endif | |
418 | mutex_unlock(&tz->lock); | |
837b26bb | 419 | exit: |
e6e238c3 ADK |
420 | return ret; |
421 | } | |
837b26bb | 422 | EXPORT_SYMBOL_GPL(thermal_zone_get_temp); |
e6e238c3 | 423 | |
0c01ebbf D |
424 | static void update_temperature(struct thermal_zone_device *tz) |
425 | { | |
426 | long temp; | |
427 | int ret; | |
428 | ||
e6e238c3 | 429 | ret = thermal_zone_get_temp(tz, &temp); |
0c01ebbf | 430 | if (ret) { |
923e0b1e EV |
431 | dev_warn(&tz->device, "failed to read out thermal zone %d\n", |
432 | tz->id); | |
e6e238c3 | 433 | return; |
0c01ebbf D |
434 | } |
435 | ||
e6e238c3 | 436 | mutex_lock(&tz->lock); |
0c01ebbf D |
437 | tz->last_temperature = tz->temperature; |
438 | tz->temperature = temp; | |
0c01ebbf D |
439 | mutex_unlock(&tz->lock); |
440 | } | |
441 | ||
442 | void thermal_zone_device_update(struct thermal_zone_device *tz) | |
443 | { | |
444 | int count; | |
445 | ||
446 | update_temperature(tz); | |
447 | ||
448 | for (count = 0; count < tz->trips; count++) | |
449 | handle_thermal_trip(tz, count); | |
450 | } | |
910cb1e3 | 451 | EXPORT_SYMBOL_GPL(thermal_zone_device_update); |
0c01ebbf D |
452 | |
453 | static void thermal_zone_device_check(struct work_struct *work) | |
454 | { | |
455 | struct thermal_zone_device *tz = container_of(work, struct | |
456 | thermal_zone_device, | |
457 | poll_queue.work); | |
458 | thermal_zone_device_update(tz); | |
459 | } | |
460 | ||
203d3d4a ZR |
461 | /* sys I/F for thermal zone */ |
462 | ||
463 | #define to_thermal_zone(_dev) \ | |
464 | container_of(_dev, struct thermal_zone_device, device) | |
465 | ||
466 | static ssize_t | |
467 | type_show(struct device *dev, struct device_attribute *attr, char *buf) | |
468 | { | |
469 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
470 | ||
471 | return sprintf(buf, "%s\n", tz->type); | |
472 | } | |
473 | ||
474 | static ssize_t | |
475 | temp_show(struct device *dev, struct device_attribute *attr, char *buf) | |
476 | { | |
477 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
478 | long temperature; |
479 | int ret; | |
203d3d4a | 480 | |
e6e238c3 | 481 | ret = thermal_zone_get_temp(tz, &temperature); |
6503e5df MG |
482 | |
483 | if (ret) | |
484 | return ret; | |
485 | ||
486 | return sprintf(buf, "%ld\n", temperature); | |
203d3d4a ZR |
487 | } |
488 | ||
489 | static ssize_t | |
490 | mode_show(struct device *dev, struct device_attribute *attr, char *buf) | |
491 | { | |
492 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
493 | enum thermal_device_mode mode; |
494 | int result; | |
203d3d4a ZR |
495 | |
496 | if (!tz->ops->get_mode) | |
497 | return -EPERM; | |
498 | ||
6503e5df MG |
499 | result = tz->ops->get_mode(tz, &mode); |
500 | if (result) | |
501 | return result; | |
502 | ||
503 | return sprintf(buf, "%s\n", mode == THERMAL_DEVICE_ENABLED ? "enabled" | |
504 | : "disabled"); | |
203d3d4a ZR |
505 | } |
506 | ||
507 | static ssize_t | |
508 | mode_store(struct device *dev, struct device_attribute *attr, | |
509 | const char *buf, size_t count) | |
510 | { | |
511 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
512 | int result; | |
513 | ||
514 | if (!tz->ops->set_mode) | |
515 | return -EPERM; | |
516 | ||
f1f0e2ac | 517 | if (!strncmp(buf, "enabled", sizeof("enabled") - 1)) |
6503e5df | 518 | result = tz->ops->set_mode(tz, THERMAL_DEVICE_ENABLED); |
f1f0e2ac | 519 | else if (!strncmp(buf, "disabled", sizeof("disabled") - 1)) |
6503e5df MG |
520 | result = tz->ops->set_mode(tz, THERMAL_DEVICE_DISABLED); |
521 | else | |
522 | result = -EINVAL; | |
523 | ||
203d3d4a ZR |
524 | if (result) |
525 | return result; | |
526 | ||
527 | return count; | |
528 | } | |
529 | ||
530 | static ssize_t | |
531 | trip_point_type_show(struct device *dev, struct device_attribute *attr, | |
532 | char *buf) | |
533 | { | |
534 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
535 | enum thermal_trip_type type; |
536 | int trip, result; | |
203d3d4a ZR |
537 | |
538 | if (!tz->ops->get_trip_type) | |
539 | return -EPERM; | |
540 | ||
541 | if (!sscanf(attr->attr.name, "trip_point_%d_type", &trip)) | |
542 | return -EINVAL; | |
543 | ||
6503e5df MG |
544 | result = tz->ops->get_trip_type(tz, trip, &type); |
545 | if (result) | |
546 | return result; | |
547 | ||
548 | switch (type) { | |
549 | case THERMAL_TRIP_CRITICAL: | |
625120a4 | 550 | return sprintf(buf, "critical\n"); |
6503e5df | 551 | case THERMAL_TRIP_HOT: |
625120a4 | 552 | return sprintf(buf, "hot\n"); |
6503e5df | 553 | case THERMAL_TRIP_PASSIVE: |
625120a4 | 554 | return sprintf(buf, "passive\n"); |
6503e5df | 555 | case THERMAL_TRIP_ACTIVE: |
625120a4 | 556 | return sprintf(buf, "active\n"); |
6503e5df | 557 | default: |
625120a4 | 558 | return sprintf(buf, "unknown\n"); |
6503e5df | 559 | } |
203d3d4a ZR |
560 | } |
561 | ||
c56f5c03 D |
562 | static ssize_t |
563 | trip_point_temp_store(struct device *dev, struct device_attribute *attr, | |
564 | const char *buf, size_t count) | |
565 | { | |
566 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
567 | int trip, ret; | |
568 | unsigned long temperature; | |
569 | ||
570 | if (!tz->ops->set_trip_temp) | |
571 | return -EPERM; | |
572 | ||
573 | if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip)) | |
574 | return -EINVAL; | |
575 | ||
576 | if (kstrtoul(buf, 10, &temperature)) | |
577 | return -EINVAL; | |
578 | ||
579 | ret = tz->ops->set_trip_temp(tz, trip, temperature); | |
580 | ||
581 | return ret ? ret : count; | |
582 | } | |
583 | ||
203d3d4a ZR |
584 | static ssize_t |
585 | trip_point_temp_show(struct device *dev, struct device_attribute *attr, | |
586 | char *buf) | |
587 | { | |
588 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
589 | int trip, ret; |
590 | long temperature; | |
203d3d4a ZR |
591 | |
592 | if (!tz->ops->get_trip_temp) | |
593 | return -EPERM; | |
594 | ||
595 | if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip)) | |
596 | return -EINVAL; | |
597 | ||
6503e5df MG |
598 | ret = tz->ops->get_trip_temp(tz, trip, &temperature); |
599 | ||
600 | if (ret) | |
601 | return ret; | |
602 | ||
603 | return sprintf(buf, "%ld\n", temperature); | |
203d3d4a ZR |
604 | } |
605 | ||
27365a6c D |
606 | static ssize_t |
607 | trip_point_hyst_store(struct device *dev, struct device_attribute *attr, | |
608 | const char *buf, size_t count) | |
609 | { | |
610 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
611 | int trip, ret; | |
612 | unsigned long temperature; | |
613 | ||
614 | if (!tz->ops->set_trip_hyst) | |
615 | return -EPERM; | |
616 | ||
617 | if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip)) | |
618 | return -EINVAL; | |
619 | ||
620 | if (kstrtoul(buf, 10, &temperature)) | |
621 | return -EINVAL; | |
622 | ||
623 | /* | |
624 | * We are not doing any check on the 'temperature' value | |
625 | * here. The driver implementing 'set_trip_hyst' has to | |
626 | * take care of this. | |
627 | */ | |
628 | ret = tz->ops->set_trip_hyst(tz, trip, temperature); | |
629 | ||
630 | return ret ? ret : count; | |
631 | } | |
632 | ||
633 | static ssize_t | |
634 | trip_point_hyst_show(struct device *dev, struct device_attribute *attr, | |
635 | char *buf) | |
636 | { | |
637 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
638 | int trip, ret; | |
639 | unsigned long temperature; | |
640 | ||
641 | if (!tz->ops->get_trip_hyst) | |
642 | return -EPERM; | |
643 | ||
644 | if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip)) | |
645 | return -EINVAL; | |
646 | ||
647 | ret = tz->ops->get_trip_hyst(tz, trip, &temperature); | |
648 | ||
649 | return ret ? ret : sprintf(buf, "%ld\n", temperature); | |
650 | } | |
651 | ||
03a971a2 MG |
652 | static ssize_t |
653 | passive_store(struct device *dev, struct device_attribute *attr, | |
654 | const char *buf, size_t count) | |
655 | { | |
656 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
657 | struct thermal_cooling_device *cdev = NULL; | |
658 | int state; | |
659 | ||
660 | if (!sscanf(buf, "%d\n", &state)) | |
661 | return -EINVAL; | |
662 | ||
3d8e3ad8 FP |
663 | /* sanity check: values below 1000 millicelcius don't make sense |
664 | * and can cause the system to go into a thermal heart attack | |
665 | */ | |
666 | if (state && state < 1000) | |
667 | return -EINVAL; | |
668 | ||
03a971a2 MG |
669 | if (state && !tz->forced_passive) { |
670 | mutex_lock(&thermal_list_lock); | |
671 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
672 | if (!strncmp("Processor", cdev->type, | |
673 | sizeof("Processor"))) | |
674 | thermal_zone_bind_cooling_device(tz, | |
9d99842f ZR |
675 | THERMAL_TRIPS_NONE, cdev, |
676 | THERMAL_NO_LIMIT, | |
677 | THERMAL_NO_LIMIT); | |
03a971a2 MG |
678 | } |
679 | mutex_unlock(&thermal_list_lock); | |
e4143b03 FP |
680 | if (!tz->passive_delay) |
681 | tz->passive_delay = 1000; | |
03a971a2 MG |
682 | } else if (!state && tz->forced_passive) { |
683 | mutex_lock(&thermal_list_lock); | |
684 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
685 | if (!strncmp("Processor", cdev->type, | |
686 | sizeof("Processor"))) | |
687 | thermal_zone_unbind_cooling_device(tz, | |
688 | THERMAL_TRIPS_NONE, | |
689 | cdev); | |
690 | } | |
691 | mutex_unlock(&thermal_list_lock); | |
e4143b03 | 692 | tz->passive_delay = 0; |
03a971a2 MG |
693 | } |
694 | ||
03a971a2 MG |
695 | tz->forced_passive = state; |
696 | ||
697 | thermal_zone_device_update(tz); | |
698 | ||
699 | return count; | |
700 | } | |
701 | ||
702 | static ssize_t | |
703 | passive_show(struct device *dev, struct device_attribute *attr, | |
704 | char *buf) | |
705 | { | |
706 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
707 | ||
708 | return sprintf(buf, "%d\n", tz->forced_passive); | |
709 | } | |
710 | ||
5a2c090b D |
711 | static ssize_t |
712 | policy_store(struct device *dev, struct device_attribute *attr, | |
713 | const char *buf, size_t count) | |
714 | { | |
715 | int ret = -EINVAL; | |
716 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
717 | struct thermal_governor *gov; | |
42a5bf50 AS |
718 | char name[THERMAL_NAME_LENGTH]; |
719 | ||
720 | snprintf(name, sizeof(name), "%s", buf); | |
5a2c090b D |
721 | |
722 | mutex_lock(&thermal_governor_lock); | |
723 | ||
42a5bf50 | 724 | gov = __find_governor(strim(name)); |
5a2c090b D |
725 | if (!gov) |
726 | goto exit; | |
727 | ||
728 | tz->governor = gov; | |
729 | ret = count; | |
730 | ||
731 | exit: | |
732 | mutex_unlock(&thermal_governor_lock); | |
733 | return ret; | |
734 | } | |
735 | ||
736 | static ssize_t | |
737 | policy_show(struct device *dev, struct device_attribute *devattr, char *buf) | |
738 | { | |
739 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
740 | ||
741 | return sprintf(buf, "%s\n", tz->governor->name); | |
742 | } | |
743 | ||
e6e238c3 ADK |
744 | #ifdef CONFIG_THERMAL_EMULATION |
745 | static ssize_t | |
746 | emul_temp_store(struct device *dev, struct device_attribute *attr, | |
747 | const char *buf, size_t count) | |
748 | { | |
749 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
750 | int ret = 0; | |
751 | unsigned long temperature; | |
752 | ||
753 | if (kstrtoul(buf, 10, &temperature)) | |
754 | return -EINVAL; | |
755 | ||
756 | if (!tz->ops->set_emul_temp) { | |
757 | mutex_lock(&tz->lock); | |
758 | tz->emul_temperature = temperature; | |
759 | mutex_unlock(&tz->lock); | |
760 | } else { | |
761 | ret = tz->ops->set_emul_temp(tz, temperature); | |
762 | } | |
763 | ||
764 | return ret ? ret : count; | |
765 | } | |
766 | static DEVICE_ATTR(emul_temp, S_IWUSR, NULL, emul_temp_store); | |
767 | #endif/*CONFIG_THERMAL_EMULATION*/ | |
768 | ||
203d3d4a ZR |
769 | static DEVICE_ATTR(type, 0444, type_show, NULL); |
770 | static DEVICE_ATTR(temp, 0444, temp_show, NULL); | |
771 | static DEVICE_ATTR(mode, 0644, mode_show, mode_store); | |
886ee546 | 772 | static DEVICE_ATTR(passive, S_IRUGO | S_IWUSR, passive_show, passive_store); |
5a2c090b | 773 | static DEVICE_ATTR(policy, S_IRUGO | S_IWUSR, policy_show, policy_store); |
203d3d4a | 774 | |
203d3d4a ZR |
775 | /* sys I/F for cooling device */ |
776 | #define to_cooling_device(_dev) \ | |
777 | container_of(_dev, struct thermal_cooling_device, device) | |
778 | ||
779 | static ssize_t | |
780 | thermal_cooling_device_type_show(struct device *dev, | |
781 | struct device_attribute *attr, char *buf) | |
782 | { | |
783 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
784 | ||
785 | return sprintf(buf, "%s\n", cdev->type); | |
786 | } | |
787 | ||
788 | static ssize_t | |
789 | thermal_cooling_device_max_state_show(struct device *dev, | |
790 | struct device_attribute *attr, char *buf) | |
791 | { | |
792 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df MG |
793 | unsigned long state; |
794 | int ret; | |
203d3d4a | 795 | |
6503e5df MG |
796 | ret = cdev->ops->get_max_state(cdev, &state); |
797 | if (ret) | |
798 | return ret; | |
799 | return sprintf(buf, "%ld\n", state); | |
203d3d4a ZR |
800 | } |
801 | ||
802 | static ssize_t | |
803 | thermal_cooling_device_cur_state_show(struct device *dev, | |
804 | struct device_attribute *attr, char *buf) | |
805 | { | |
806 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df MG |
807 | unsigned long state; |
808 | int ret; | |
203d3d4a | 809 | |
6503e5df MG |
810 | ret = cdev->ops->get_cur_state(cdev, &state); |
811 | if (ret) | |
812 | return ret; | |
813 | return sprintf(buf, "%ld\n", state); | |
203d3d4a ZR |
814 | } |
815 | ||
816 | static ssize_t | |
817 | thermal_cooling_device_cur_state_store(struct device *dev, | |
818 | struct device_attribute *attr, | |
819 | const char *buf, size_t count) | |
820 | { | |
821 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df | 822 | unsigned long state; |
203d3d4a ZR |
823 | int result; |
824 | ||
6503e5df | 825 | if (!sscanf(buf, "%ld\n", &state)) |
203d3d4a ZR |
826 | return -EINVAL; |
827 | ||
edb94918 | 828 | if ((long)state < 0) |
203d3d4a ZR |
829 | return -EINVAL; |
830 | ||
831 | result = cdev->ops->set_cur_state(cdev, state); | |
832 | if (result) | |
833 | return result; | |
834 | return count; | |
835 | } | |
836 | ||
837 | static struct device_attribute dev_attr_cdev_type = | |
543a9561 | 838 | __ATTR(type, 0444, thermal_cooling_device_type_show, NULL); |
203d3d4a ZR |
839 | static DEVICE_ATTR(max_state, 0444, |
840 | thermal_cooling_device_max_state_show, NULL); | |
841 | static DEVICE_ATTR(cur_state, 0644, | |
842 | thermal_cooling_device_cur_state_show, | |
843 | thermal_cooling_device_cur_state_store); | |
844 | ||
845 | static ssize_t | |
846 | thermal_cooling_device_trip_point_show(struct device *dev, | |
543a9561 | 847 | struct device_attribute *attr, char *buf) |
203d3d4a | 848 | { |
b81b6ba3 | 849 | struct thermal_instance *instance; |
203d3d4a ZR |
850 | |
851 | instance = | |
b81b6ba3 | 852 | container_of(attr, struct thermal_instance, attr); |
203d3d4a ZR |
853 | |
854 | if (instance->trip == THERMAL_TRIPS_NONE) | |
855 | return sprintf(buf, "-1\n"); | |
856 | else | |
857 | return sprintf(buf, "%d\n", instance->trip); | |
858 | } | |
859 | ||
860 | /* Device management */ | |
861 | ||
16d75239 RH |
862 | #if defined(CONFIG_THERMAL_HWMON) |
863 | ||
e68b16ab ZR |
864 | /* hwmon sys I/F */ |
865 | #include <linux/hwmon.h> | |
31f5396a JD |
866 | |
867 | /* thermal zone devices with the same type share one hwmon device */ | |
868 | struct thermal_hwmon_device { | |
869 | char type[THERMAL_NAME_LENGTH]; | |
870 | struct device *device; | |
871 | int count; | |
872 | struct list_head tz_list; | |
873 | struct list_head node; | |
874 | }; | |
875 | ||
876 | struct thermal_hwmon_attr { | |
877 | struct device_attribute attr; | |
878 | char name[16]; | |
879 | }; | |
880 | ||
881 | /* one temperature input for each thermal zone */ | |
882 | struct thermal_hwmon_temp { | |
883 | struct list_head hwmon_node; | |
884 | struct thermal_zone_device *tz; | |
885 | struct thermal_hwmon_attr temp_input; /* hwmon sys attr */ | |
886 | struct thermal_hwmon_attr temp_crit; /* hwmon sys attr */ | |
887 | }; | |
888 | ||
e68b16ab ZR |
889 | static LIST_HEAD(thermal_hwmon_list); |
890 | ||
891 | static ssize_t | |
892 | name_show(struct device *dev, struct device_attribute *attr, char *buf) | |
893 | { | |
0e968a3b | 894 | struct thermal_hwmon_device *hwmon = dev_get_drvdata(dev); |
e68b16ab ZR |
895 | return sprintf(buf, "%s\n", hwmon->type); |
896 | } | |
897 | static DEVICE_ATTR(name, 0444, name_show, NULL); | |
898 | ||
899 | static ssize_t | |
900 | temp_input_show(struct device *dev, struct device_attribute *attr, char *buf) | |
901 | { | |
6503e5df MG |
902 | long temperature; |
903 | int ret; | |
e68b16ab ZR |
904 | struct thermal_hwmon_attr *hwmon_attr |
905 | = container_of(attr, struct thermal_hwmon_attr, attr); | |
31f5396a JD |
906 | struct thermal_hwmon_temp *temp |
907 | = container_of(hwmon_attr, struct thermal_hwmon_temp, | |
e68b16ab | 908 | temp_input); |
31f5396a | 909 | struct thermal_zone_device *tz = temp->tz; |
e68b16ab | 910 | |
e6e238c3 | 911 | ret = thermal_zone_get_temp(tz, &temperature); |
6503e5df MG |
912 | |
913 | if (ret) | |
914 | return ret; | |
915 | ||
916 | return sprintf(buf, "%ld\n", temperature); | |
e68b16ab ZR |
917 | } |
918 | ||
919 | static ssize_t | |
920 | temp_crit_show(struct device *dev, struct device_attribute *attr, | |
921 | char *buf) | |
922 | { | |
923 | struct thermal_hwmon_attr *hwmon_attr | |
924 | = container_of(attr, struct thermal_hwmon_attr, attr); | |
31f5396a JD |
925 | struct thermal_hwmon_temp *temp |
926 | = container_of(hwmon_attr, struct thermal_hwmon_temp, | |
e68b16ab | 927 | temp_crit); |
31f5396a | 928 | struct thermal_zone_device *tz = temp->tz; |
6503e5df MG |
929 | long temperature; |
930 | int ret; | |
931 | ||
932 | ret = tz->ops->get_trip_temp(tz, 0, &temperature); | |
933 | if (ret) | |
934 | return ret; | |
e68b16ab | 935 | |
6503e5df | 936 | return sprintf(buf, "%ld\n", temperature); |
e68b16ab ZR |
937 | } |
938 | ||
939 | ||
0d97d7a4 JD |
940 | static struct thermal_hwmon_device * |
941 | thermal_hwmon_lookup_by_type(const struct thermal_zone_device *tz) | |
e68b16ab ZR |
942 | { |
943 | struct thermal_hwmon_device *hwmon; | |
e68b16ab ZR |
944 | |
945 | mutex_lock(&thermal_list_lock); | |
946 | list_for_each_entry(hwmon, &thermal_hwmon_list, node) | |
947 | if (!strcmp(hwmon->type, tz->type)) { | |
e68b16ab | 948 | mutex_unlock(&thermal_list_lock); |
0d97d7a4 | 949 | return hwmon; |
e68b16ab ZR |
950 | } |
951 | mutex_unlock(&thermal_list_lock); | |
952 | ||
0d97d7a4 JD |
953 | return NULL; |
954 | } | |
955 | ||
31f5396a JD |
956 | /* Find the temperature input matching a given thermal zone */ |
957 | static struct thermal_hwmon_temp * | |
958 | thermal_hwmon_lookup_temp(const struct thermal_hwmon_device *hwmon, | |
959 | const struct thermal_zone_device *tz) | |
960 | { | |
961 | struct thermal_hwmon_temp *temp; | |
962 | ||
963 | mutex_lock(&thermal_list_lock); | |
964 | list_for_each_entry(temp, &hwmon->tz_list, hwmon_node) | |
965 | if (temp->tz == tz) { | |
966 | mutex_unlock(&thermal_list_lock); | |
967 | return temp; | |
968 | } | |
969 | mutex_unlock(&thermal_list_lock); | |
970 | ||
971 | return NULL; | |
972 | } | |
973 | ||
0d97d7a4 JD |
974 | static int |
975 | thermal_add_hwmon_sysfs(struct thermal_zone_device *tz) | |
976 | { | |
977 | struct thermal_hwmon_device *hwmon; | |
31f5396a | 978 | struct thermal_hwmon_temp *temp; |
0d97d7a4 JD |
979 | int new_hwmon_device = 1; |
980 | int result; | |
981 | ||
982 | hwmon = thermal_hwmon_lookup_by_type(tz); | |
983 | if (hwmon) { | |
984 | new_hwmon_device = 0; | |
985 | goto register_sys_interface; | |
986 | } | |
987 | ||
e68b16ab ZR |
988 | hwmon = kzalloc(sizeof(struct thermal_hwmon_device), GFP_KERNEL); |
989 | if (!hwmon) | |
990 | return -ENOMEM; | |
991 | ||
992 | INIT_LIST_HEAD(&hwmon->tz_list); | |
993 | strlcpy(hwmon->type, tz->type, THERMAL_NAME_LENGTH); | |
994 | hwmon->device = hwmon_device_register(NULL); | |
995 | if (IS_ERR(hwmon->device)) { | |
996 | result = PTR_ERR(hwmon->device); | |
997 | goto free_mem; | |
998 | } | |
0e968a3b | 999 | dev_set_drvdata(hwmon->device, hwmon); |
e68b16ab ZR |
1000 | result = device_create_file(hwmon->device, &dev_attr_name); |
1001 | if (result) | |
b299eb5c | 1002 | goto free_mem; |
e68b16ab ZR |
1003 | |
1004 | register_sys_interface: | |
31f5396a JD |
1005 | temp = kzalloc(sizeof(struct thermal_hwmon_temp), GFP_KERNEL); |
1006 | if (!temp) { | |
1007 | result = -ENOMEM; | |
1008 | goto unregister_name; | |
1009 | } | |
1010 | ||
1011 | temp->tz = tz; | |
e68b16ab ZR |
1012 | hwmon->count++; |
1013 | ||
79a49168 | 1014 | snprintf(temp->temp_input.name, sizeof(temp->temp_input.name), |
e68b16ab | 1015 | "temp%d_input", hwmon->count); |
31f5396a JD |
1016 | temp->temp_input.attr.attr.name = temp->temp_input.name; |
1017 | temp->temp_input.attr.attr.mode = 0444; | |
1018 | temp->temp_input.attr.show = temp_input_show; | |
1019 | sysfs_attr_init(&temp->temp_input.attr.attr); | |
1020 | result = device_create_file(hwmon->device, &temp->temp_input.attr); | |
e68b16ab | 1021 | if (result) |
31f5396a | 1022 | goto free_temp_mem; |
e68b16ab ZR |
1023 | |
1024 | if (tz->ops->get_crit_temp) { | |
1025 | unsigned long temperature; | |
1026 | if (!tz->ops->get_crit_temp(tz, &temperature)) { | |
79a49168 GR |
1027 | snprintf(temp->temp_crit.name, |
1028 | sizeof(temp->temp_crit.name), | |
e68b16ab | 1029 | "temp%d_crit", hwmon->count); |
31f5396a JD |
1030 | temp->temp_crit.attr.attr.name = temp->temp_crit.name; |
1031 | temp->temp_crit.attr.attr.mode = 0444; | |
1032 | temp->temp_crit.attr.show = temp_crit_show; | |
1033 | sysfs_attr_init(&temp->temp_crit.attr.attr); | |
e68b16ab | 1034 | result = device_create_file(hwmon->device, |
31f5396a | 1035 | &temp->temp_crit.attr); |
e68b16ab | 1036 | if (result) |
b299eb5c | 1037 | goto unregister_input; |
e68b16ab ZR |
1038 | } |
1039 | } | |
1040 | ||
1041 | mutex_lock(&thermal_list_lock); | |
1042 | if (new_hwmon_device) | |
1043 | list_add_tail(&hwmon->node, &thermal_hwmon_list); | |
31f5396a | 1044 | list_add_tail(&temp->hwmon_node, &hwmon->tz_list); |
e68b16ab ZR |
1045 | mutex_unlock(&thermal_list_lock); |
1046 | ||
1047 | return 0; | |
1048 | ||
b299eb5c | 1049 | unregister_input: |
31f5396a JD |
1050 | device_remove_file(hwmon->device, &temp->temp_input.attr); |
1051 | free_temp_mem: | |
1052 | kfree(temp); | |
b299eb5c | 1053 | unregister_name: |
e68b16ab ZR |
1054 | if (new_hwmon_device) { |
1055 | device_remove_file(hwmon->device, &dev_attr_name); | |
1056 | hwmon_device_unregister(hwmon->device); | |
1057 | } | |
1058 | free_mem: | |
1059 | if (new_hwmon_device) | |
1060 | kfree(hwmon); | |
1061 | ||
1062 | return result; | |
1063 | } | |
1064 | ||
1065 | static void | |
1066 | thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz) | |
1067 | { | |
31f5396a JD |
1068 | struct thermal_hwmon_device *hwmon; |
1069 | struct thermal_hwmon_temp *temp; | |
1070 | ||
1071 | hwmon = thermal_hwmon_lookup_by_type(tz); | |
1072 | if (unlikely(!hwmon)) { | |
1073 | /* Should never happen... */ | |
1074 | dev_dbg(&tz->device, "hwmon device lookup failed!\n"); | |
1075 | return; | |
1076 | } | |
1077 | ||
1078 | temp = thermal_hwmon_lookup_temp(hwmon, tz); | |
1079 | if (unlikely(!temp)) { | |
1080 | /* Should never happen... */ | |
1081 | dev_dbg(&tz->device, "temperature input lookup failed!\n"); | |
1082 | return; | |
1083 | } | |
e68b16ab | 1084 | |
31f5396a | 1085 | device_remove_file(hwmon->device, &temp->temp_input.attr); |
b299eb5c | 1086 | if (tz->ops->get_crit_temp) |
31f5396a | 1087 | device_remove_file(hwmon->device, &temp->temp_crit.attr); |
e68b16ab ZR |
1088 | |
1089 | mutex_lock(&thermal_list_lock); | |
31f5396a JD |
1090 | list_del(&temp->hwmon_node); |
1091 | kfree(temp); | |
e68b16ab ZR |
1092 | if (!list_empty(&hwmon->tz_list)) { |
1093 | mutex_unlock(&thermal_list_lock); | |
1094 | return; | |
1095 | } | |
1096 | list_del(&hwmon->node); | |
1097 | mutex_unlock(&thermal_list_lock); | |
1098 | ||
1099 | device_remove_file(hwmon->device, &dev_attr_name); | |
1100 | hwmon_device_unregister(hwmon->device); | |
1101 | kfree(hwmon); | |
1102 | } | |
1103 | #else | |
1104 | static int | |
1105 | thermal_add_hwmon_sysfs(struct thermal_zone_device *tz) | |
1106 | { | |
1107 | return 0; | |
1108 | } | |
1109 | ||
1110 | static void | |
1111 | thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz) | |
1112 | { | |
1113 | } | |
1114 | #endif | |
1115 | ||
203d3d4a | 1116 | /** |
d2e4eb83 EV |
1117 | * thermal_zone_bind_cooling_device() - bind a cooling device to a thermal zone |
1118 | * @tz: pointer to struct thermal_zone_device | |
203d3d4a ZR |
1119 | * @trip: indicates which trip point the cooling devices is |
1120 | * associated with in this thermal zone. | |
d2e4eb83 EV |
1121 | * @cdev: pointer to struct thermal_cooling_device |
1122 | * @upper: the Maximum cooling state for this trip point. | |
1123 | * THERMAL_NO_LIMIT means no upper limit, | |
1124 | * and the cooling device can be in max_state. | |
1125 | * @lower: the Minimum cooling state can be used for this trip point. | |
1126 | * THERMAL_NO_LIMIT means no lower limit, | |
1127 | * and the cooling device can be in cooling state 0. | |
543a9561 | 1128 | * |
d2e4eb83 EV |
1129 | * This interface function bind a thermal cooling device to the certain trip |
1130 | * point of a thermal zone device. | |
543a9561 | 1131 | * This function is usually called in the thermal zone device .bind callback. |
d2e4eb83 EV |
1132 | * |
1133 | * Return: 0 on success, the proper error value otherwise. | |
203d3d4a ZR |
1134 | */ |
1135 | int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, | |
1136 | int trip, | |
9d99842f ZR |
1137 | struct thermal_cooling_device *cdev, |
1138 | unsigned long upper, unsigned long lower) | |
203d3d4a | 1139 | { |
b81b6ba3 ZR |
1140 | struct thermal_instance *dev; |
1141 | struct thermal_instance *pos; | |
c7516709 TS |
1142 | struct thermal_zone_device *pos1; |
1143 | struct thermal_cooling_device *pos2; | |
74051ba5 | 1144 | unsigned long max_state; |
203d3d4a ZR |
1145 | int result; |
1146 | ||
543a9561 | 1147 | if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE)) |
203d3d4a ZR |
1148 | return -EINVAL; |
1149 | ||
c7516709 TS |
1150 | list_for_each_entry(pos1, &thermal_tz_list, node) { |
1151 | if (pos1 == tz) | |
1152 | break; | |
1153 | } | |
1154 | list_for_each_entry(pos2, &thermal_cdev_list, node) { | |
1155 | if (pos2 == cdev) | |
1156 | break; | |
1157 | } | |
1158 | ||
1159 | if (tz != pos1 || cdev != pos2) | |
203d3d4a ZR |
1160 | return -EINVAL; |
1161 | ||
9d99842f ZR |
1162 | cdev->ops->get_max_state(cdev, &max_state); |
1163 | ||
1164 | /* lower default 0, upper default max_state */ | |
1165 | lower = lower == THERMAL_NO_LIMIT ? 0 : lower; | |
1166 | upper = upper == THERMAL_NO_LIMIT ? max_state : upper; | |
1167 | ||
1168 | if (lower > upper || upper > max_state) | |
1169 | return -EINVAL; | |
1170 | ||
203d3d4a | 1171 | dev = |
b81b6ba3 | 1172 | kzalloc(sizeof(struct thermal_instance), GFP_KERNEL); |
203d3d4a ZR |
1173 | if (!dev) |
1174 | return -ENOMEM; | |
1175 | dev->tz = tz; | |
1176 | dev->cdev = cdev; | |
1177 | dev->trip = trip; | |
9d99842f ZR |
1178 | dev->upper = upper; |
1179 | dev->lower = lower; | |
ce119f83 | 1180 | dev->target = THERMAL_NO_TARGET; |
74051ba5 | 1181 | |
203d3d4a ZR |
1182 | result = get_idr(&tz->idr, &tz->lock, &dev->id); |
1183 | if (result) | |
1184 | goto free_mem; | |
1185 | ||
1186 | sprintf(dev->name, "cdev%d", dev->id); | |
1187 | result = | |
1188 | sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev->name); | |
1189 | if (result) | |
1190 | goto release_idr; | |
1191 | ||
1192 | sprintf(dev->attr_name, "cdev%d_trip_point", dev->id); | |
975f8c56 | 1193 | sysfs_attr_init(&dev->attr.attr); |
203d3d4a ZR |
1194 | dev->attr.attr.name = dev->attr_name; |
1195 | dev->attr.attr.mode = 0444; | |
1196 | dev->attr.show = thermal_cooling_device_trip_point_show; | |
1197 | result = device_create_file(&tz->device, &dev->attr); | |
1198 | if (result) | |
1199 | goto remove_symbol_link; | |
1200 | ||
1201 | mutex_lock(&tz->lock); | |
f4a821ce | 1202 | mutex_lock(&cdev->lock); |
cddf31b3 | 1203 | list_for_each_entry(pos, &tz->thermal_instances, tz_node) |
203d3d4a ZR |
1204 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
1205 | result = -EEXIST; | |
1206 | break; | |
1207 | } | |
b5e4ae62 | 1208 | if (!result) { |
cddf31b3 | 1209 | list_add_tail(&dev->tz_node, &tz->thermal_instances); |
b5e4ae62 ZR |
1210 | list_add_tail(&dev->cdev_node, &cdev->thermal_instances); |
1211 | } | |
f4a821ce | 1212 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
1213 | mutex_unlock(&tz->lock); |
1214 | ||
1215 | if (!result) | |
1216 | return 0; | |
1217 | ||
1218 | device_remove_file(&tz->device, &dev->attr); | |
caca8b80 | 1219 | remove_symbol_link: |
203d3d4a | 1220 | sysfs_remove_link(&tz->device.kobj, dev->name); |
caca8b80 | 1221 | release_idr: |
203d3d4a | 1222 | release_idr(&tz->idr, &tz->lock, dev->id); |
caca8b80 | 1223 | free_mem: |
203d3d4a ZR |
1224 | kfree(dev); |
1225 | return result; | |
1226 | } | |
910cb1e3 | 1227 | EXPORT_SYMBOL_GPL(thermal_zone_bind_cooling_device); |
203d3d4a ZR |
1228 | |
1229 | /** | |
9892e5dc EV |
1230 | * thermal_zone_unbind_cooling_device() - unbind a cooling device from a |
1231 | * thermal zone. | |
1232 | * @tz: pointer to a struct thermal_zone_device. | |
203d3d4a ZR |
1233 | * @trip: indicates which trip point the cooling devices is |
1234 | * associated with in this thermal zone. | |
9892e5dc | 1235 | * @cdev: pointer to a struct thermal_cooling_device. |
543a9561 | 1236 | * |
9892e5dc EV |
1237 | * This interface function unbind a thermal cooling device from the certain |
1238 | * trip point of a thermal zone device. | |
543a9561 | 1239 | * This function is usually called in the thermal zone device .unbind callback. |
9892e5dc EV |
1240 | * |
1241 | * Return: 0 on success, the proper error value otherwise. | |
203d3d4a ZR |
1242 | */ |
1243 | int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz, | |
1244 | int trip, | |
1245 | struct thermal_cooling_device *cdev) | |
1246 | { | |
b81b6ba3 | 1247 | struct thermal_instance *pos, *next; |
203d3d4a ZR |
1248 | |
1249 | mutex_lock(&tz->lock); | |
f4a821ce | 1250 | mutex_lock(&cdev->lock); |
cddf31b3 | 1251 | list_for_each_entry_safe(pos, next, &tz->thermal_instances, tz_node) { |
543a9561 | 1252 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
cddf31b3 | 1253 | list_del(&pos->tz_node); |
b5e4ae62 | 1254 | list_del(&pos->cdev_node); |
f4a821ce | 1255 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
1256 | mutex_unlock(&tz->lock); |
1257 | goto unbind; | |
1258 | } | |
1259 | } | |
f4a821ce | 1260 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
1261 | mutex_unlock(&tz->lock); |
1262 | ||
1263 | return -ENODEV; | |
1264 | ||
caca8b80 | 1265 | unbind: |
203d3d4a ZR |
1266 | device_remove_file(&tz->device, &pos->attr); |
1267 | sysfs_remove_link(&tz->device.kobj, pos->name); | |
1268 | release_idr(&tz->idr, &tz->lock, pos->id); | |
1269 | kfree(pos); | |
1270 | return 0; | |
1271 | } | |
910cb1e3 | 1272 | EXPORT_SYMBOL_GPL(thermal_zone_unbind_cooling_device); |
203d3d4a ZR |
1273 | |
1274 | static void thermal_release(struct device *dev) | |
1275 | { | |
1276 | struct thermal_zone_device *tz; | |
1277 | struct thermal_cooling_device *cdev; | |
1278 | ||
caca8b80 JP |
1279 | if (!strncmp(dev_name(dev), "thermal_zone", |
1280 | sizeof("thermal_zone") - 1)) { | |
203d3d4a ZR |
1281 | tz = to_thermal_zone(dev); |
1282 | kfree(tz); | |
1283 | } else { | |
1284 | cdev = to_cooling_device(dev); | |
1285 | kfree(cdev); | |
1286 | } | |
1287 | } | |
1288 | ||
1289 | static struct class thermal_class = { | |
1290 | .name = "thermal", | |
1291 | .dev_release = thermal_release, | |
1292 | }; | |
1293 | ||
1294 | /** | |
3a6eccb3 | 1295 | * thermal_cooling_device_register() - register a new thermal cooling device |
203d3d4a ZR |
1296 | * @type: the thermal cooling device type. |
1297 | * @devdata: device private data. | |
1298 | * @ops: standard thermal cooling devices callbacks. | |
3a6eccb3 EV |
1299 | * |
1300 | * This interface function adds a new thermal cooling device (fan/processor/...) | |
1301 | * to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself | |
1302 | * to all the thermal zone devices registered at the same time. | |
1303 | * | |
1304 | * Return: a pointer to the created struct thermal_cooling_device or an | |
1305 | * ERR_PTR. Caller must check return value with IS_ERR*() helpers. | |
203d3d4a | 1306 | */ |
caca8b80 JP |
1307 | struct thermal_cooling_device * |
1308 | thermal_cooling_device_register(char *type, void *devdata, | |
1309 | const struct thermal_cooling_device_ops *ops) | |
203d3d4a ZR |
1310 | { |
1311 | struct thermal_cooling_device *cdev; | |
203d3d4a ZR |
1312 | int result; |
1313 | ||
204dd1d3 | 1314 | if (type && strlen(type) >= THERMAL_NAME_LENGTH) |
3e6fda5c | 1315 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1316 | |
1317 | if (!ops || !ops->get_max_state || !ops->get_cur_state || | |
543a9561 | 1318 | !ops->set_cur_state) |
3e6fda5c | 1319 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1320 | |
1321 | cdev = kzalloc(sizeof(struct thermal_cooling_device), GFP_KERNEL); | |
1322 | if (!cdev) | |
3e6fda5c | 1323 | return ERR_PTR(-ENOMEM); |
203d3d4a ZR |
1324 | |
1325 | result = get_idr(&thermal_cdev_idr, &thermal_idr_lock, &cdev->id); | |
1326 | if (result) { | |
1327 | kfree(cdev); | |
3e6fda5c | 1328 | return ERR_PTR(result); |
203d3d4a ZR |
1329 | } |
1330 | ||
c7a8b9d9 | 1331 | strlcpy(cdev->type, type ? : "", sizeof(cdev->type)); |
f4a821ce | 1332 | mutex_init(&cdev->lock); |
b5e4ae62 | 1333 | INIT_LIST_HEAD(&cdev->thermal_instances); |
203d3d4a | 1334 | cdev->ops = ops; |
ce119f83 | 1335 | cdev->updated = true; |
203d3d4a ZR |
1336 | cdev->device.class = &thermal_class; |
1337 | cdev->devdata = devdata; | |
354655ea | 1338 | dev_set_name(&cdev->device, "cooling_device%d", cdev->id); |
203d3d4a ZR |
1339 | result = device_register(&cdev->device); |
1340 | if (result) { | |
1341 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
1342 | kfree(cdev); | |
3e6fda5c | 1343 | return ERR_PTR(result); |
203d3d4a ZR |
1344 | } |
1345 | ||
1346 | /* sys I/F */ | |
1347 | if (type) { | |
543a9561 | 1348 | result = device_create_file(&cdev->device, &dev_attr_cdev_type); |
203d3d4a ZR |
1349 | if (result) |
1350 | goto unregister; | |
1351 | } | |
1352 | ||
1353 | result = device_create_file(&cdev->device, &dev_attr_max_state); | |
1354 | if (result) | |
1355 | goto unregister; | |
1356 | ||
1357 | result = device_create_file(&cdev->device, &dev_attr_cur_state); | |
1358 | if (result) | |
1359 | goto unregister; | |
1360 | ||
7e8ee1e9 | 1361 | /* Add 'this' new cdev to the global cdev list */ |
203d3d4a ZR |
1362 | mutex_lock(&thermal_list_lock); |
1363 | list_add(&cdev->node, &thermal_cdev_list); | |
203d3d4a ZR |
1364 | mutex_unlock(&thermal_list_lock); |
1365 | ||
7e8ee1e9 D |
1366 | /* Update binding information for 'this' new cdev */ |
1367 | bind_cdev(cdev); | |
1368 | ||
1369 | return cdev; | |
203d3d4a | 1370 | |
caca8b80 | 1371 | unregister: |
203d3d4a ZR |
1372 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); |
1373 | device_unregister(&cdev->device); | |
3e6fda5c | 1374 | return ERR_PTR(result); |
203d3d4a | 1375 | } |
910cb1e3 | 1376 | EXPORT_SYMBOL_GPL(thermal_cooling_device_register); |
203d3d4a ZR |
1377 | |
1378 | /** | |
1379 | * thermal_cooling_device_unregister - removes the registered thermal cooling device | |
203d3d4a ZR |
1380 | * @cdev: the thermal cooling device to remove. |
1381 | * | |
1382 | * thermal_cooling_device_unregister() must be called when the device is no | |
1383 | * longer needed. | |
1384 | */ | |
7e8ee1e9 | 1385 | void thermal_cooling_device_unregister(struct thermal_cooling_device *cdev) |
203d3d4a | 1386 | { |
7e8ee1e9 D |
1387 | int i; |
1388 | const struct thermal_zone_params *tzp; | |
203d3d4a ZR |
1389 | struct thermal_zone_device *tz; |
1390 | struct thermal_cooling_device *pos = NULL; | |
1391 | ||
1392 | if (!cdev) | |
1393 | return; | |
1394 | ||
1395 | mutex_lock(&thermal_list_lock); | |
1396 | list_for_each_entry(pos, &thermal_cdev_list, node) | |
1397 | if (pos == cdev) | |
1398 | break; | |
1399 | if (pos != cdev) { | |
1400 | /* thermal cooling device not found */ | |
1401 | mutex_unlock(&thermal_list_lock); | |
1402 | return; | |
1403 | } | |
1404 | list_del(&cdev->node); | |
7e8ee1e9 D |
1405 | |
1406 | /* Unbind all thermal zones associated with 'this' cdev */ | |
203d3d4a | 1407 | list_for_each_entry(tz, &thermal_tz_list, node) { |
7e8ee1e9 D |
1408 | if (tz->ops->unbind) { |
1409 | tz->ops->unbind(tz, cdev); | |
1410 | continue; | |
1411 | } | |
1412 | ||
1413 | if (!tz->tzp || !tz->tzp->tbp) | |
203d3d4a | 1414 | continue; |
7e8ee1e9 D |
1415 | |
1416 | tzp = tz->tzp; | |
1417 | for (i = 0; i < tzp->num_tbps; i++) { | |
1418 | if (tzp->tbp[i].cdev == cdev) { | |
1419 | __unbind(tz, tzp->tbp[i].trip_mask, cdev); | |
1420 | tzp->tbp[i].cdev = NULL; | |
1421 | } | |
1422 | } | |
203d3d4a | 1423 | } |
7e8ee1e9 | 1424 | |
203d3d4a | 1425 | mutex_unlock(&thermal_list_lock); |
7e8ee1e9 | 1426 | |
203d3d4a | 1427 | if (cdev->type[0]) |
543a9561 | 1428 | device_remove_file(&cdev->device, &dev_attr_cdev_type); |
203d3d4a ZR |
1429 | device_remove_file(&cdev->device, &dev_attr_max_state); |
1430 | device_remove_file(&cdev->device, &dev_attr_cur_state); | |
1431 | ||
1432 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
1433 | device_unregister(&cdev->device); | |
1434 | return; | |
1435 | } | |
910cb1e3 | 1436 | EXPORT_SYMBOL_GPL(thermal_cooling_device_unregister); |
203d3d4a | 1437 | |
dc765482 | 1438 | void thermal_cdev_update(struct thermal_cooling_device *cdev) |
ce119f83 ZR |
1439 | { |
1440 | struct thermal_instance *instance; | |
1441 | unsigned long target = 0; | |
1442 | ||
1443 | /* cooling device is updated*/ | |
1444 | if (cdev->updated) | |
1445 | return; | |
1446 | ||
f4a821ce | 1447 | mutex_lock(&cdev->lock); |
ce119f83 ZR |
1448 | /* Make sure cdev enters the deepest cooling state */ |
1449 | list_for_each_entry(instance, &cdev->thermal_instances, cdev_node) { | |
1450 | if (instance->target == THERMAL_NO_TARGET) | |
1451 | continue; | |
1452 | if (instance->target > target) | |
1453 | target = instance->target; | |
1454 | } | |
f4a821ce | 1455 | mutex_unlock(&cdev->lock); |
ce119f83 ZR |
1456 | cdev->ops->set_cur_state(cdev, target); |
1457 | cdev->updated = true; | |
1458 | } | |
dc765482 | 1459 | EXPORT_SYMBOL(thermal_cdev_update); |
ce119f83 | 1460 | |
f2b4caaf | 1461 | /** |
7b73c993 | 1462 | * thermal_notify_framework - Sensor drivers use this API to notify framework |
f2b4caaf D |
1463 | * @tz: thermal zone device |
1464 | * @trip: indicates which trip point has been crossed | |
1465 | * | |
1466 | * This function handles the trip events from sensor drivers. It starts | |
1467 | * throttling the cooling devices according to the policy configured. | |
1468 | * For CRITICAL and HOT trip points, this notifies the respective drivers, | |
1469 | * and does actual throttling for other trip points i.e ACTIVE and PASSIVE. | |
1470 | * The throttling policy is based on the configured platform data; if no | |
1471 | * platform data is provided, this uses the step_wise throttling policy. | |
1472 | */ | |
7b73c993 | 1473 | void thermal_notify_framework(struct thermal_zone_device *tz, int trip) |
f2b4caaf D |
1474 | { |
1475 | handle_thermal_trip(tz, trip); | |
1476 | } | |
910cb1e3 | 1477 | EXPORT_SYMBOL_GPL(thermal_notify_framework); |
f2b4caaf | 1478 | |
c56f5c03 | 1479 | /** |
269c174f | 1480 | * create_trip_attrs() - create attributes for trip points |
c56f5c03 D |
1481 | * @tz: the thermal zone device |
1482 | * @mask: Writeable trip point bitmap. | |
269c174f EV |
1483 | * |
1484 | * helper function to instantiate sysfs entries for every trip | |
1485 | * point and its properties of a struct thermal_zone_device. | |
1486 | * | |
1487 | * Return: 0 on success, the proper error value otherwise. | |
c56f5c03 D |
1488 | */ |
1489 | static int create_trip_attrs(struct thermal_zone_device *tz, int mask) | |
1490 | { | |
1491 | int indx; | |
27365a6c | 1492 | int size = sizeof(struct thermal_attr) * tz->trips; |
c56f5c03 | 1493 | |
27365a6c | 1494 | tz->trip_type_attrs = kzalloc(size, GFP_KERNEL); |
c56f5c03 D |
1495 | if (!tz->trip_type_attrs) |
1496 | return -ENOMEM; | |
1497 | ||
27365a6c | 1498 | tz->trip_temp_attrs = kzalloc(size, GFP_KERNEL); |
c56f5c03 D |
1499 | if (!tz->trip_temp_attrs) { |
1500 | kfree(tz->trip_type_attrs); | |
1501 | return -ENOMEM; | |
1502 | } | |
1503 | ||
27365a6c D |
1504 | if (tz->ops->get_trip_hyst) { |
1505 | tz->trip_hyst_attrs = kzalloc(size, GFP_KERNEL); | |
1506 | if (!tz->trip_hyst_attrs) { | |
1507 | kfree(tz->trip_type_attrs); | |
1508 | kfree(tz->trip_temp_attrs); | |
1509 | return -ENOMEM; | |
1510 | } | |
1511 | } | |
c56f5c03 | 1512 | |
27365a6c D |
1513 | |
1514 | for (indx = 0; indx < tz->trips; indx++) { | |
c56f5c03 D |
1515 | /* create trip type attribute */ |
1516 | snprintf(tz->trip_type_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1517 | "trip_point_%d_type", indx); | |
1518 | ||
1519 | sysfs_attr_init(&tz->trip_type_attrs[indx].attr.attr); | |
1520 | tz->trip_type_attrs[indx].attr.attr.name = | |
1521 | tz->trip_type_attrs[indx].name; | |
1522 | tz->trip_type_attrs[indx].attr.attr.mode = S_IRUGO; | |
1523 | tz->trip_type_attrs[indx].attr.show = trip_point_type_show; | |
1524 | ||
1525 | device_create_file(&tz->device, | |
1526 | &tz->trip_type_attrs[indx].attr); | |
1527 | ||
1528 | /* create trip temp attribute */ | |
1529 | snprintf(tz->trip_temp_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1530 | "trip_point_%d_temp", indx); | |
1531 | ||
1532 | sysfs_attr_init(&tz->trip_temp_attrs[indx].attr.attr); | |
1533 | tz->trip_temp_attrs[indx].attr.attr.name = | |
1534 | tz->trip_temp_attrs[indx].name; | |
1535 | tz->trip_temp_attrs[indx].attr.attr.mode = S_IRUGO; | |
1536 | tz->trip_temp_attrs[indx].attr.show = trip_point_temp_show; | |
1537 | if (mask & (1 << indx)) { | |
1538 | tz->trip_temp_attrs[indx].attr.attr.mode |= S_IWUSR; | |
1539 | tz->trip_temp_attrs[indx].attr.store = | |
1540 | trip_point_temp_store; | |
1541 | } | |
1542 | ||
1543 | device_create_file(&tz->device, | |
1544 | &tz->trip_temp_attrs[indx].attr); | |
27365a6c D |
1545 | |
1546 | /* create Optional trip hyst attribute */ | |
1547 | if (!tz->ops->get_trip_hyst) | |
1548 | continue; | |
1549 | snprintf(tz->trip_hyst_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1550 | "trip_point_%d_hyst", indx); | |
1551 | ||
1552 | sysfs_attr_init(&tz->trip_hyst_attrs[indx].attr.attr); | |
1553 | tz->trip_hyst_attrs[indx].attr.attr.name = | |
1554 | tz->trip_hyst_attrs[indx].name; | |
1555 | tz->trip_hyst_attrs[indx].attr.attr.mode = S_IRUGO; | |
1556 | tz->trip_hyst_attrs[indx].attr.show = trip_point_hyst_show; | |
1557 | if (tz->ops->set_trip_hyst) { | |
1558 | tz->trip_hyst_attrs[indx].attr.attr.mode |= S_IWUSR; | |
1559 | tz->trip_hyst_attrs[indx].attr.store = | |
1560 | trip_point_hyst_store; | |
1561 | } | |
1562 | ||
1563 | device_create_file(&tz->device, | |
1564 | &tz->trip_hyst_attrs[indx].attr); | |
c56f5c03 D |
1565 | } |
1566 | return 0; | |
1567 | } | |
1568 | ||
1569 | static void remove_trip_attrs(struct thermal_zone_device *tz) | |
1570 | { | |
1571 | int indx; | |
1572 | ||
1573 | for (indx = 0; indx < tz->trips; indx++) { | |
1574 | device_remove_file(&tz->device, | |
1575 | &tz->trip_type_attrs[indx].attr); | |
1576 | device_remove_file(&tz->device, | |
1577 | &tz->trip_temp_attrs[indx].attr); | |
27365a6c D |
1578 | if (tz->ops->get_trip_hyst) |
1579 | device_remove_file(&tz->device, | |
1580 | &tz->trip_hyst_attrs[indx].attr); | |
c56f5c03 D |
1581 | } |
1582 | kfree(tz->trip_type_attrs); | |
1583 | kfree(tz->trip_temp_attrs); | |
27365a6c | 1584 | kfree(tz->trip_hyst_attrs); |
c56f5c03 D |
1585 | } |
1586 | ||
203d3d4a | 1587 | /** |
a00e55f9 | 1588 | * thermal_zone_device_register() - register a new thermal zone device |
203d3d4a ZR |
1589 | * @type: the thermal zone device type |
1590 | * @trips: the number of trip points the thermal zone support | |
c56f5c03 | 1591 | * @mask: a bit string indicating the writeablility of trip points |
203d3d4a ZR |
1592 | * @devdata: private device data |
1593 | * @ops: standard thermal zone device callbacks | |
50125a9b | 1594 | * @tzp: thermal zone platform parameters |
b1569e99 MG |
1595 | * @passive_delay: number of milliseconds to wait between polls when |
1596 | * performing passive cooling | |
1597 | * @polling_delay: number of milliseconds to wait between polls when checking | |
1598 | * whether trip points have been crossed (0 for interrupt | |
1599 | * driven systems) | |
203d3d4a | 1600 | * |
a00e55f9 EV |
1601 | * This interface function adds a new thermal zone device (sensor) to |
1602 | * /sys/class/thermal folder as thermal_zone[0-*]. It tries to bind all the | |
1603 | * thermal cooling devices registered at the same time. | |
203d3d4a | 1604 | * thermal_zone_device_unregister() must be called when the device is no |
1b7ddb84 | 1605 | * longer needed. The passive cooling depends on the .get_trend() return value. |
a00e55f9 EV |
1606 | * |
1607 | * Return: a pointer to the created struct thermal_zone_device or an | |
1608 | * in case of error, an ERR_PTR. Caller must check return value with | |
1609 | * IS_ERR*() helpers. | |
203d3d4a | 1610 | */ |
4b1bf587 | 1611 | struct thermal_zone_device *thermal_zone_device_register(const char *type, |
c56f5c03 | 1612 | int trips, int mask, void *devdata, |
5b275ce2 | 1613 | const struct thermal_zone_device_ops *ops, |
50125a9b | 1614 | const struct thermal_zone_params *tzp, |
1b7ddb84 | 1615 | int passive_delay, int polling_delay) |
203d3d4a ZR |
1616 | { |
1617 | struct thermal_zone_device *tz; | |
03a971a2 | 1618 | enum thermal_trip_type trip_type; |
203d3d4a ZR |
1619 | int result; |
1620 | int count; | |
03a971a2 | 1621 | int passive = 0; |
203d3d4a | 1622 | |
204dd1d3 | 1623 | if (type && strlen(type) >= THERMAL_NAME_LENGTH) |
3e6fda5c | 1624 | return ERR_PTR(-EINVAL); |
203d3d4a | 1625 | |
c56f5c03 | 1626 | if (trips > THERMAL_MAX_TRIPS || trips < 0 || mask >> trips) |
3e6fda5c | 1627 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1628 | |
1629 | if (!ops || !ops->get_temp) | |
3e6fda5c | 1630 | return ERR_PTR(-EINVAL); |
203d3d4a | 1631 | |
83720d0b | 1632 | if (trips > 0 && (!ops->get_trip_type || !ops->get_trip_temp)) |
6b2aa51d EV |
1633 | return ERR_PTR(-EINVAL); |
1634 | ||
203d3d4a ZR |
1635 | tz = kzalloc(sizeof(struct thermal_zone_device), GFP_KERNEL); |
1636 | if (!tz) | |
3e6fda5c | 1637 | return ERR_PTR(-ENOMEM); |
203d3d4a | 1638 | |
2d374139 | 1639 | INIT_LIST_HEAD(&tz->thermal_instances); |
203d3d4a ZR |
1640 | idr_init(&tz->idr); |
1641 | mutex_init(&tz->lock); | |
1642 | result = get_idr(&thermal_tz_idr, &thermal_idr_lock, &tz->id); | |
1643 | if (result) { | |
1644 | kfree(tz); | |
3e6fda5c | 1645 | return ERR_PTR(result); |
203d3d4a ZR |
1646 | } |
1647 | ||
c7a8b9d9 | 1648 | strlcpy(tz->type, type ? : "", sizeof(tz->type)); |
203d3d4a | 1649 | tz->ops = ops; |
50125a9b | 1650 | tz->tzp = tzp; |
203d3d4a ZR |
1651 | tz->device.class = &thermal_class; |
1652 | tz->devdata = devdata; | |
1653 | tz->trips = trips; | |
b1569e99 MG |
1654 | tz->passive_delay = passive_delay; |
1655 | tz->polling_delay = polling_delay; | |
1656 | ||
354655ea | 1657 | dev_set_name(&tz->device, "thermal_zone%d", tz->id); |
203d3d4a ZR |
1658 | result = device_register(&tz->device); |
1659 | if (result) { | |
1660 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); | |
1661 | kfree(tz); | |
3e6fda5c | 1662 | return ERR_PTR(result); |
203d3d4a ZR |
1663 | } |
1664 | ||
1665 | /* sys I/F */ | |
1666 | if (type) { | |
1667 | result = device_create_file(&tz->device, &dev_attr_type); | |
1668 | if (result) | |
1669 | goto unregister; | |
1670 | } | |
1671 | ||
1672 | result = device_create_file(&tz->device, &dev_attr_temp); | |
1673 | if (result) | |
1674 | goto unregister; | |
1675 | ||
1676 | if (ops->get_mode) { | |
1677 | result = device_create_file(&tz->device, &dev_attr_mode); | |
1678 | if (result) | |
1679 | goto unregister; | |
1680 | } | |
1681 | ||
c56f5c03 D |
1682 | result = create_trip_attrs(tz, mask); |
1683 | if (result) | |
1684 | goto unregister; | |
1685 | ||
203d3d4a | 1686 | for (count = 0; count < trips; count++) { |
03a971a2 MG |
1687 | tz->ops->get_trip_type(tz, count, &trip_type); |
1688 | if (trip_type == THERMAL_TRIP_PASSIVE) | |
1689 | passive = 1; | |
203d3d4a ZR |
1690 | } |
1691 | ||
5a2c090b D |
1692 | if (!passive) { |
1693 | result = device_create_file(&tz->device, &dev_attr_passive); | |
1694 | if (result) | |
1695 | goto unregister; | |
1696 | } | |
03a971a2 | 1697 | |
e6e238c3 ADK |
1698 | #ifdef CONFIG_THERMAL_EMULATION |
1699 | result = device_create_file(&tz->device, &dev_attr_emul_temp); | |
1700 | if (result) | |
1701 | goto unregister; | |
1702 | #endif | |
5a2c090b D |
1703 | /* Create policy attribute */ |
1704 | result = device_create_file(&tz->device, &dev_attr_policy); | |
03a971a2 MG |
1705 | if (result) |
1706 | goto unregister; | |
1707 | ||
a4a15485 D |
1708 | /* Update 'this' zone's governor information */ |
1709 | mutex_lock(&thermal_governor_lock); | |
1710 | ||
1711 | if (tz->tzp) | |
1712 | tz->governor = __find_governor(tz->tzp->governor_name); | |
1713 | else | |
1714 | tz->governor = __find_governor(DEFAULT_THERMAL_GOVERNOR); | |
1715 | ||
1716 | mutex_unlock(&thermal_governor_lock); | |
1717 | ||
e68b16ab ZR |
1718 | result = thermal_add_hwmon_sysfs(tz); |
1719 | if (result) | |
1720 | goto unregister; | |
1721 | ||
203d3d4a ZR |
1722 | mutex_lock(&thermal_list_lock); |
1723 | list_add_tail(&tz->node, &thermal_tz_list); | |
203d3d4a ZR |
1724 | mutex_unlock(&thermal_list_lock); |
1725 | ||
7e8ee1e9 D |
1726 | /* Bind cooling devices for this zone */ |
1727 | bind_tz(tz); | |
1728 | ||
b1569e99 MG |
1729 | INIT_DELAYED_WORK(&(tz->poll_queue), thermal_zone_device_check); |
1730 | ||
1731 | thermal_zone_device_update(tz); | |
1732 | ||
203d3d4a ZR |
1733 | if (!result) |
1734 | return tz; | |
1735 | ||
caca8b80 | 1736 | unregister: |
203d3d4a ZR |
1737 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1738 | device_unregister(&tz->device); | |
3e6fda5c | 1739 | return ERR_PTR(result); |
203d3d4a | 1740 | } |
910cb1e3 | 1741 | EXPORT_SYMBOL_GPL(thermal_zone_device_register); |
203d3d4a ZR |
1742 | |
1743 | /** | |
1744 | * thermal_device_unregister - removes the registered thermal zone device | |
203d3d4a ZR |
1745 | * @tz: the thermal zone device to remove |
1746 | */ | |
1747 | void thermal_zone_device_unregister(struct thermal_zone_device *tz) | |
1748 | { | |
7e8ee1e9 D |
1749 | int i; |
1750 | const struct thermal_zone_params *tzp; | |
203d3d4a ZR |
1751 | struct thermal_cooling_device *cdev; |
1752 | struct thermal_zone_device *pos = NULL; | |
203d3d4a ZR |
1753 | |
1754 | if (!tz) | |
1755 | return; | |
1756 | ||
7e8ee1e9 D |
1757 | tzp = tz->tzp; |
1758 | ||
203d3d4a ZR |
1759 | mutex_lock(&thermal_list_lock); |
1760 | list_for_each_entry(pos, &thermal_tz_list, node) | |
1761 | if (pos == tz) | |
1762 | break; | |
1763 | if (pos != tz) { | |
1764 | /* thermal zone device not found */ | |
1765 | mutex_unlock(&thermal_list_lock); | |
1766 | return; | |
1767 | } | |
1768 | list_del(&tz->node); | |
7e8ee1e9 D |
1769 | |
1770 | /* Unbind all cdevs associated with 'this' thermal zone */ | |
1771 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
1772 | if (tz->ops->unbind) { | |
1773 | tz->ops->unbind(tz, cdev); | |
1774 | continue; | |
1775 | } | |
1776 | ||
1777 | if (!tzp || !tzp->tbp) | |
1778 | break; | |
1779 | ||
1780 | for (i = 0; i < tzp->num_tbps; i++) { | |
1781 | if (tzp->tbp[i].cdev == cdev) { | |
1782 | __unbind(tz, tzp->tbp[i].trip_mask, cdev); | |
1783 | tzp->tbp[i].cdev = NULL; | |
1784 | } | |
1785 | } | |
1786 | } | |
1787 | ||
203d3d4a ZR |
1788 | mutex_unlock(&thermal_list_lock); |
1789 | ||
b1569e99 MG |
1790 | thermal_zone_device_set_polling(tz, 0); |
1791 | ||
203d3d4a ZR |
1792 | if (tz->type[0]) |
1793 | device_remove_file(&tz->device, &dev_attr_type); | |
1794 | device_remove_file(&tz->device, &dev_attr_temp); | |
1795 | if (tz->ops->get_mode) | |
1796 | device_remove_file(&tz->device, &dev_attr_mode); | |
5a2c090b | 1797 | device_remove_file(&tz->device, &dev_attr_policy); |
c56f5c03 | 1798 | remove_trip_attrs(tz); |
a4a15485 | 1799 | tz->governor = NULL; |
203d3d4a | 1800 | |
e68b16ab | 1801 | thermal_remove_hwmon_sysfs(tz); |
203d3d4a ZR |
1802 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1803 | idr_destroy(&tz->idr); | |
1804 | mutex_destroy(&tz->lock); | |
1805 | device_unregister(&tz->device); | |
1806 | return; | |
1807 | } | |
910cb1e3 | 1808 | EXPORT_SYMBOL_GPL(thermal_zone_device_unregister); |
203d3d4a | 1809 | |
63c4d919 EV |
1810 | /** |
1811 | * thermal_zone_get_zone_by_name() - search for a zone and returns its ref | |
1812 | * @name: thermal zone name to fetch the temperature | |
1813 | * | |
1814 | * When only one zone is found with the passed name, returns a reference to it. | |
1815 | * | |
1816 | * Return: On success returns a reference to an unique thermal zone with | |
1817 | * matching name equals to @name, an ERR_PTR otherwise (-EINVAL for invalid | |
1818 | * paramenters, -ENODEV for not found and -EEXIST for multiple matches). | |
1819 | */ | |
1820 | struct thermal_zone_device *thermal_zone_get_zone_by_name(const char *name) | |
1821 | { | |
1822 | struct thermal_zone_device *pos = NULL, *ref = ERR_PTR(-EINVAL); | |
1823 | unsigned int found = 0; | |
1824 | ||
1825 | if (!name) | |
1826 | goto exit; | |
1827 | ||
1828 | mutex_lock(&thermal_list_lock); | |
1829 | list_for_each_entry(pos, &thermal_tz_list, node) | |
1830 | if (!strnicmp(name, pos->type, THERMAL_NAME_LENGTH)) { | |
1831 | found++; | |
1832 | ref = pos; | |
1833 | } | |
1834 | mutex_unlock(&thermal_list_lock); | |
1835 | ||
1836 | /* nothing has been found, thus an error code for it */ | |
1837 | if (found == 0) | |
1838 | ref = ERR_PTR(-ENODEV); | |
1839 | else if (found > 1) | |
1840 | /* Success only when an unique zone is found */ | |
1841 | ref = ERR_PTR(-EEXIST); | |
1842 | ||
1843 | exit: | |
1844 | return ref; | |
1845 | } | |
1846 | EXPORT_SYMBOL_GPL(thermal_zone_get_zone_by_name); | |
1847 | ||
af06216a RW |
1848 | #ifdef CONFIG_NET |
1849 | static struct genl_family thermal_event_genl_family = { | |
1850 | .id = GENL_ID_GENERATE, | |
1851 | .name = THERMAL_GENL_FAMILY_NAME, | |
1852 | .version = THERMAL_GENL_VERSION, | |
1853 | .maxattr = THERMAL_GENL_ATTR_MAX, | |
1854 | }; | |
1855 | ||
1856 | static struct genl_multicast_group thermal_event_mcgrp = { | |
1857 | .name = THERMAL_GENL_MCAST_GROUP_NAME, | |
1858 | }; | |
1859 | ||
8ab3e6a0 EV |
1860 | int thermal_generate_netlink_event(struct thermal_zone_device *tz, |
1861 | enum events event) | |
4cb18728 D |
1862 | { |
1863 | struct sk_buff *skb; | |
1864 | struct nlattr *attr; | |
1865 | struct thermal_genl_event *thermal_event; | |
1866 | void *msg_header; | |
1867 | int size; | |
1868 | int result; | |
b11de07c | 1869 | static unsigned int thermal_event_seqnum; |
4cb18728 | 1870 | |
8ab3e6a0 EV |
1871 | if (!tz) |
1872 | return -EINVAL; | |
1873 | ||
4cb18728 | 1874 | /* allocate memory */ |
886ee546 JP |
1875 | size = nla_total_size(sizeof(struct thermal_genl_event)) + |
1876 | nla_total_size(0); | |
4cb18728 D |
1877 | |
1878 | skb = genlmsg_new(size, GFP_ATOMIC); | |
1879 | if (!skb) | |
1880 | return -ENOMEM; | |
1881 | ||
1882 | /* add the genetlink message header */ | |
1883 | msg_header = genlmsg_put(skb, 0, thermal_event_seqnum++, | |
1884 | &thermal_event_genl_family, 0, | |
1885 | THERMAL_GENL_CMD_EVENT); | |
1886 | if (!msg_header) { | |
1887 | nlmsg_free(skb); | |
1888 | return -ENOMEM; | |
1889 | } | |
1890 | ||
1891 | /* fill the data */ | |
886ee546 JP |
1892 | attr = nla_reserve(skb, THERMAL_GENL_ATTR_EVENT, |
1893 | sizeof(struct thermal_genl_event)); | |
4cb18728 D |
1894 | |
1895 | if (!attr) { | |
1896 | nlmsg_free(skb); | |
1897 | return -EINVAL; | |
1898 | } | |
1899 | ||
1900 | thermal_event = nla_data(attr); | |
1901 | if (!thermal_event) { | |
1902 | nlmsg_free(skb); | |
1903 | return -EINVAL; | |
1904 | } | |
1905 | ||
1906 | memset(thermal_event, 0, sizeof(struct thermal_genl_event)); | |
1907 | ||
8ab3e6a0 | 1908 | thermal_event->orig = tz->id; |
4cb18728 D |
1909 | thermal_event->event = event; |
1910 | ||
1911 | /* send multicast genetlink message */ | |
1912 | result = genlmsg_end(skb, msg_header); | |
1913 | if (result < 0) { | |
1914 | nlmsg_free(skb); | |
1915 | return result; | |
1916 | } | |
1917 | ||
1918 | result = genlmsg_multicast(skb, 0, thermal_event_mcgrp.id, GFP_ATOMIC); | |
1919 | if (result) | |
923e0b1e | 1920 | dev_err(&tz->device, "Failed to send netlink event:%d", result); |
4cb18728 D |
1921 | |
1922 | return result; | |
1923 | } | |
910cb1e3 | 1924 | EXPORT_SYMBOL_GPL(thermal_generate_netlink_event); |
4cb18728 D |
1925 | |
1926 | static int genetlink_init(void) | |
1927 | { | |
1928 | int result; | |
1929 | ||
1930 | result = genl_register_family(&thermal_event_genl_family); | |
1931 | if (result) | |
1932 | return result; | |
1933 | ||
1934 | result = genl_register_mc_group(&thermal_event_genl_family, | |
1935 | &thermal_event_mcgrp); | |
1936 | if (result) | |
1937 | genl_unregister_family(&thermal_event_genl_family); | |
1938 | return result; | |
1939 | } | |
1940 | ||
af06216a RW |
1941 | static void genetlink_exit(void) |
1942 | { | |
1943 | genl_unregister_family(&thermal_event_genl_family); | |
1944 | } | |
1945 | #else /* !CONFIG_NET */ | |
1946 | static inline int genetlink_init(void) { return 0; } | |
1947 | static inline void genetlink_exit(void) {} | |
1948 | #endif /* !CONFIG_NET */ | |
1949 | ||
80a26a5c ZR |
1950 | static int __init thermal_register_governors(void) |
1951 | { | |
1952 | int result; | |
1953 | ||
1954 | result = thermal_gov_step_wise_register(); | |
1955 | if (result) | |
1956 | return result; | |
1957 | ||
1958 | result = thermal_gov_fair_share_register(); | |
1959 | if (result) | |
1960 | return result; | |
1961 | ||
1962 | return thermal_gov_user_space_register(); | |
1963 | } | |
1964 | ||
1965 | static void thermal_unregister_governors(void) | |
1966 | { | |
1967 | thermal_gov_step_wise_unregister(); | |
1968 | thermal_gov_fair_share_unregister(); | |
1969 | thermal_gov_user_space_unregister(); | |
1970 | } | |
1971 | ||
203d3d4a ZR |
1972 | static int __init thermal_init(void) |
1973 | { | |
80a26a5c ZR |
1974 | int result; |
1975 | ||
1976 | result = thermal_register_governors(); | |
1977 | if (result) | |
1978 | goto error; | |
203d3d4a ZR |
1979 | |
1980 | result = class_register(&thermal_class); | |
80a26a5c ZR |
1981 | if (result) |
1982 | goto unregister_governors; | |
1983 | ||
4cb18728 | 1984 | result = genetlink_init(); |
80a26a5c ZR |
1985 | if (result) |
1986 | goto unregister_class; | |
1987 | ||
1988 | return 0; | |
1989 | ||
1990 | unregister_governors: | |
1991 | thermal_unregister_governors(); | |
1992 | unregister_class: | |
1993 | class_unregister(&thermal_class); | |
1994 | error: | |
1995 | idr_destroy(&thermal_tz_idr); | |
1996 | idr_destroy(&thermal_cdev_idr); | |
1997 | mutex_destroy(&thermal_idr_lock); | |
1998 | mutex_destroy(&thermal_list_lock); | |
1999 | mutex_destroy(&thermal_governor_lock); | |
203d3d4a ZR |
2000 | return result; |
2001 | } | |
2002 | ||
2003 | static void __exit thermal_exit(void) | |
2004 | { | |
80a26a5c | 2005 | genetlink_exit(); |
203d3d4a | 2006 | class_unregister(&thermal_class); |
80a26a5c | 2007 | thermal_unregister_governors(); |
203d3d4a ZR |
2008 | idr_destroy(&thermal_tz_idr); |
2009 | idr_destroy(&thermal_cdev_idr); | |
2010 | mutex_destroy(&thermal_idr_lock); | |
2011 | mutex_destroy(&thermal_list_lock); | |
80a26a5c | 2012 | mutex_destroy(&thermal_governor_lock); |
203d3d4a ZR |
2013 | } |
2014 | ||
4cb18728 | 2015 | fs_initcall(thermal_init); |
203d3d4a | 2016 | module_exit(thermal_exit); |