Commit | Line | Data |
---|---|---|
203d3d4a ZR |
1 | /* |
2 | * thermal.c - Generic Thermal Management Sysfs support. | |
3 | * | |
4 | * Copyright (C) 2008 Intel Corp | |
5 | * Copyright (C) 2008 Zhang Rui <rui.zhang@intel.com> | |
6 | * Copyright (C) 2008 Sujith Thomas <sujith.thomas@intel.com> | |
7 | * | |
8 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; version 2 of the License. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License along | |
20 | * with this program; if not, write to the Free Software Foundation, Inc., | |
21 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
22 | * | |
23 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
24 | */ | |
25 | ||
c5a01dd5 JP |
26 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
27 | ||
203d3d4a ZR |
28 | #include <linux/module.h> |
29 | #include <linux/device.h> | |
30 | #include <linux/err.h> | |
5a0e3ad6 | 31 | #include <linux/slab.h> |
203d3d4a ZR |
32 | #include <linux/kdev_t.h> |
33 | #include <linux/idr.h> | |
34 | #include <linux/thermal.h> | |
b1569e99 | 35 | #include <linux/reboot.h> |
4cb18728 D |
36 | #include <net/netlink.h> |
37 | #include <net/genetlink.h> | |
203d3d4a | 38 | |
71350db4 D |
39 | #include "thermal_core.h" |
40 | ||
63c4ec90 | 41 | MODULE_AUTHOR("Zhang Rui"); |
203d3d4a ZR |
42 | MODULE_DESCRIPTION("Generic thermal management sysfs support"); |
43 | MODULE_LICENSE("GPL"); | |
44 | ||
203d3d4a ZR |
45 | static DEFINE_IDR(thermal_tz_idr); |
46 | static DEFINE_IDR(thermal_cdev_idr); | |
47 | static DEFINE_MUTEX(thermal_idr_lock); | |
48 | ||
49 | static LIST_HEAD(thermal_tz_list); | |
50 | static LIST_HEAD(thermal_cdev_list); | |
a4a15485 D |
51 | static LIST_HEAD(thermal_governor_list); |
52 | ||
203d3d4a | 53 | static DEFINE_MUTEX(thermal_list_lock); |
a4a15485 D |
54 | static DEFINE_MUTEX(thermal_governor_lock); |
55 | ||
56 | static struct thermal_governor *__find_governor(const char *name) | |
57 | { | |
58 | struct thermal_governor *pos; | |
59 | ||
60 | list_for_each_entry(pos, &thermal_governor_list, governor_list) | |
61 | if (!strnicmp(name, pos->name, THERMAL_NAME_LENGTH)) | |
62 | return pos; | |
63 | ||
64 | return NULL; | |
65 | } | |
66 | ||
67 | int thermal_register_governor(struct thermal_governor *governor) | |
68 | { | |
69 | int err; | |
70 | const char *name; | |
71 | struct thermal_zone_device *pos; | |
72 | ||
73 | if (!governor) | |
74 | return -EINVAL; | |
75 | ||
76 | mutex_lock(&thermal_governor_lock); | |
77 | ||
78 | err = -EBUSY; | |
79 | if (__find_governor(governor->name) == NULL) { | |
80 | err = 0; | |
81 | list_add(&governor->governor_list, &thermal_governor_list); | |
82 | } | |
83 | ||
84 | mutex_lock(&thermal_list_lock); | |
85 | ||
86 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
87 | if (pos->governor) | |
88 | continue; | |
89 | if (pos->tzp) | |
90 | name = pos->tzp->governor_name; | |
91 | else | |
92 | name = DEFAULT_THERMAL_GOVERNOR; | |
93 | if (!strnicmp(name, governor->name, THERMAL_NAME_LENGTH)) | |
94 | pos->governor = governor; | |
95 | } | |
96 | ||
97 | mutex_unlock(&thermal_list_lock); | |
98 | mutex_unlock(&thermal_governor_lock); | |
99 | ||
100 | return err; | |
101 | } | |
102 | EXPORT_SYMBOL_GPL(thermal_register_governor); | |
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 | } | |
130 | EXPORT_SYMBOL_GPL(thermal_unregister_governor); | |
203d3d4a ZR |
131 | |
132 | static int get_idr(struct idr *idr, struct mutex *lock, int *id) | |
133 | { | |
6deb69fa | 134 | int ret; |
203d3d4a ZR |
135 | |
136 | if (lock) | |
137 | mutex_lock(lock); | |
6deb69fa | 138 | ret = idr_alloc(idr, NULL, 0, 0, GFP_KERNEL); |
203d3d4a ZR |
139 | if (lock) |
140 | mutex_unlock(lock); | |
6deb69fa TH |
141 | if (unlikely(ret < 0)) |
142 | return ret; | |
143 | *id = ret; | |
203d3d4a ZR |
144 | return 0; |
145 | } | |
146 | ||
147 | static void release_idr(struct idr *idr, struct mutex *lock, int id) | |
148 | { | |
149 | if (lock) | |
150 | mutex_lock(lock); | |
151 | idr_remove(idr, id); | |
152 | if (lock) | |
153 | mutex_unlock(lock); | |
154 | } | |
155 | ||
9b4298a0 D |
156 | int get_tz_trend(struct thermal_zone_device *tz, int trip) |
157 | { | |
158 | enum thermal_trend trend; | |
159 | ||
160 | if (!tz->ops->get_trend || tz->ops->get_trend(tz, trip, &trend)) { | |
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 | ||
e6e238c3 ADK |
374 | static int thermal_zone_get_temp(struct thermal_zone_device *tz, |
375 | unsigned long *temp) | |
376 | { | |
5e20b2e5 ZR |
377 | int ret = 0; |
378 | #ifdef CONFIG_THERMAL_EMULATION | |
379 | int count; | |
e6e238c3 ADK |
380 | unsigned long crit_temp = -1UL; |
381 | enum thermal_trip_type type; | |
5e20b2e5 | 382 | #endif |
e6e238c3 ADK |
383 | |
384 | mutex_lock(&tz->lock); | |
385 | ||
386 | ret = tz->ops->get_temp(tz, temp); | |
387 | #ifdef CONFIG_THERMAL_EMULATION | |
388 | if (!tz->emul_temperature) | |
389 | goto skip_emul; | |
390 | ||
391 | for (count = 0; count < tz->trips; count++) { | |
392 | ret = tz->ops->get_trip_type(tz, count, &type); | |
393 | if (!ret && type == THERMAL_TRIP_CRITICAL) { | |
394 | ret = tz->ops->get_trip_temp(tz, count, &crit_temp); | |
395 | break; | |
396 | } | |
397 | } | |
398 | ||
399 | if (ret) | |
400 | goto skip_emul; | |
401 | ||
402 | if (*temp < crit_temp) | |
403 | *temp = tz->emul_temperature; | |
404 | skip_emul: | |
405 | #endif | |
406 | mutex_unlock(&tz->lock); | |
407 | return ret; | |
408 | } | |
409 | ||
0c01ebbf D |
410 | static void update_temperature(struct thermal_zone_device *tz) |
411 | { | |
412 | long temp; | |
413 | int ret; | |
414 | ||
e6e238c3 | 415 | ret = thermal_zone_get_temp(tz, &temp); |
0c01ebbf | 416 | if (ret) { |
923e0b1e EV |
417 | dev_warn(&tz->device, "failed to read out thermal zone %d\n", |
418 | tz->id); | |
e6e238c3 | 419 | return; |
0c01ebbf D |
420 | } |
421 | ||
e6e238c3 | 422 | mutex_lock(&tz->lock); |
0c01ebbf D |
423 | tz->last_temperature = tz->temperature; |
424 | tz->temperature = temp; | |
0c01ebbf D |
425 | mutex_unlock(&tz->lock); |
426 | } | |
427 | ||
428 | void thermal_zone_device_update(struct thermal_zone_device *tz) | |
429 | { | |
430 | int count; | |
431 | ||
432 | update_temperature(tz); | |
433 | ||
434 | for (count = 0; count < tz->trips; count++) | |
435 | handle_thermal_trip(tz, count); | |
436 | } | |
437 | EXPORT_SYMBOL(thermal_zone_device_update); | |
438 | ||
439 | static void thermal_zone_device_check(struct work_struct *work) | |
440 | { | |
441 | struct thermal_zone_device *tz = container_of(work, struct | |
442 | thermal_zone_device, | |
443 | poll_queue.work); | |
444 | thermal_zone_device_update(tz); | |
445 | } | |
446 | ||
203d3d4a ZR |
447 | /* sys I/F for thermal zone */ |
448 | ||
449 | #define to_thermal_zone(_dev) \ | |
450 | container_of(_dev, struct thermal_zone_device, device) | |
451 | ||
452 | static ssize_t | |
453 | type_show(struct device *dev, struct device_attribute *attr, char *buf) | |
454 | { | |
455 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
456 | ||
457 | return sprintf(buf, "%s\n", tz->type); | |
458 | } | |
459 | ||
460 | static ssize_t | |
461 | temp_show(struct device *dev, struct device_attribute *attr, char *buf) | |
462 | { | |
463 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
464 | long temperature; |
465 | int ret; | |
203d3d4a | 466 | |
e6e238c3 | 467 | ret = thermal_zone_get_temp(tz, &temperature); |
6503e5df MG |
468 | |
469 | if (ret) | |
470 | return ret; | |
471 | ||
472 | return sprintf(buf, "%ld\n", temperature); | |
203d3d4a ZR |
473 | } |
474 | ||
475 | static ssize_t | |
476 | mode_show(struct device *dev, struct device_attribute *attr, char *buf) | |
477 | { | |
478 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
479 | enum thermal_device_mode mode; |
480 | int result; | |
203d3d4a ZR |
481 | |
482 | if (!tz->ops->get_mode) | |
483 | return -EPERM; | |
484 | ||
6503e5df MG |
485 | result = tz->ops->get_mode(tz, &mode); |
486 | if (result) | |
487 | return result; | |
488 | ||
489 | return sprintf(buf, "%s\n", mode == THERMAL_DEVICE_ENABLED ? "enabled" | |
490 | : "disabled"); | |
203d3d4a ZR |
491 | } |
492 | ||
493 | static ssize_t | |
494 | mode_store(struct device *dev, struct device_attribute *attr, | |
495 | const char *buf, size_t count) | |
496 | { | |
497 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
498 | int result; | |
499 | ||
500 | if (!tz->ops->set_mode) | |
501 | return -EPERM; | |
502 | ||
f1f0e2ac | 503 | if (!strncmp(buf, "enabled", sizeof("enabled") - 1)) |
6503e5df | 504 | result = tz->ops->set_mode(tz, THERMAL_DEVICE_ENABLED); |
f1f0e2ac | 505 | else if (!strncmp(buf, "disabled", sizeof("disabled") - 1)) |
6503e5df MG |
506 | result = tz->ops->set_mode(tz, THERMAL_DEVICE_DISABLED); |
507 | else | |
508 | result = -EINVAL; | |
509 | ||
203d3d4a ZR |
510 | if (result) |
511 | return result; | |
512 | ||
513 | return count; | |
514 | } | |
515 | ||
516 | static ssize_t | |
517 | trip_point_type_show(struct device *dev, struct device_attribute *attr, | |
518 | char *buf) | |
519 | { | |
520 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
521 | enum thermal_trip_type type; |
522 | int trip, result; | |
203d3d4a ZR |
523 | |
524 | if (!tz->ops->get_trip_type) | |
525 | return -EPERM; | |
526 | ||
527 | if (!sscanf(attr->attr.name, "trip_point_%d_type", &trip)) | |
528 | return -EINVAL; | |
529 | ||
6503e5df MG |
530 | result = tz->ops->get_trip_type(tz, trip, &type); |
531 | if (result) | |
532 | return result; | |
533 | ||
534 | switch (type) { | |
535 | case THERMAL_TRIP_CRITICAL: | |
625120a4 | 536 | return sprintf(buf, "critical\n"); |
6503e5df | 537 | case THERMAL_TRIP_HOT: |
625120a4 | 538 | return sprintf(buf, "hot\n"); |
6503e5df | 539 | case THERMAL_TRIP_PASSIVE: |
625120a4 | 540 | return sprintf(buf, "passive\n"); |
6503e5df | 541 | case THERMAL_TRIP_ACTIVE: |
625120a4 | 542 | return sprintf(buf, "active\n"); |
6503e5df | 543 | default: |
625120a4 | 544 | return sprintf(buf, "unknown\n"); |
6503e5df | 545 | } |
203d3d4a ZR |
546 | } |
547 | ||
c56f5c03 D |
548 | static ssize_t |
549 | trip_point_temp_store(struct device *dev, struct device_attribute *attr, | |
550 | const char *buf, size_t count) | |
551 | { | |
552 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
553 | int trip, ret; | |
554 | unsigned long temperature; | |
555 | ||
556 | if (!tz->ops->set_trip_temp) | |
557 | return -EPERM; | |
558 | ||
559 | if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip)) | |
560 | return -EINVAL; | |
561 | ||
562 | if (kstrtoul(buf, 10, &temperature)) | |
563 | return -EINVAL; | |
564 | ||
565 | ret = tz->ops->set_trip_temp(tz, trip, temperature); | |
566 | ||
567 | return ret ? ret : count; | |
568 | } | |
569 | ||
203d3d4a ZR |
570 | static ssize_t |
571 | trip_point_temp_show(struct device *dev, struct device_attribute *attr, | |
572 | char *buf) | |
573 | { | |
574 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
575 | int trip, ret; |
576 | long temperature; | |
203d3d4a ZR |
577 | |
578 | if (!tz->ops->get_trip_temp) | |
579 | return -EPERM; | |
580 | ||
581 | if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip)) | |
582 | return -EINVAL; | |
583 | ||
6503e5df MG |
584 | ret = tz->ops->get_trip_temp(tz, trip, &temperature); |
585 | ||
586 | if (ret) | |
587 | return ret; | |
588 | ||
589 | return sprintf(buf, "%ld\n", temperature); | |
203d3d4a ZR |
590 | } |
591 | ||
27365a6c D |
592 | static ssize_t |
593 | trip_point_hyst_store(struct device *dev, struct device_attribute *attr, | |
594 | const char *buf, size_t count) | |
595 | { | |
596 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
597 | int trip, ret; | |
598 | unsigned long temperature; | |
599 | ||
600 | if (!tz->ops->set_trip_hyst) | |
601 | return -EPERM; | |
602 | ||
603 | if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip)) | |
604 | return -EINVAL; | |
605 | ||
606 | if (kstrtoul(buf, 10, &temperature)) | |
607 | return -EINVAL; | |
608 | ||
609 | /* | |
610 | * We are not doing any check on the 'temperature' value | |
611 | * here. The driver implementing 'set_trip_hyst' has to | |
612 | * take care of this. | |
613 | */ | |
614 | ret = tz->ops->set_trip_hyst(tz, trip, temperature); | |
615 | ||
616 | return ret ? ret : count; | |
617 | } | |
618 | ||
619 | static ssize_t | |
620 | trip_point_hyst_show(struct device *dev, struct device_attribute *attr, | |
621 | char *buf) | |
622 | { | |
623 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
624 | int trip, ret; | |
625 | unsigned long temperature; | |
626 | ||
627 | if (!tz->ops->get_trip_hyst) | |
628 | return -EPERM; | |
629 | ||
630 | if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip)) | |
631 | return -EINVAL; | |
632 | ||
633 | ret = tz->ops->get_trip_hyst(tz, trip, &temperature); | |
634 | ||
635 | return ret ? ret : sprintf(buf, "%ld\n", temperature); | |
636 | } | |
637 | ||
03a971a2 MG |
638 | static ssize_t |
639 | passive_store(struct device *dev, struct device_attribute *attr, | |
640 | const char *buf, size_t count) | |
641 | { | |
642 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
643 | struct thermal_cooling_device *cdev = NULL; | |
644 | int state; | |
645 | ||
646 | if (!sscanf(buf, "%d\n", &state)) | |
647 | return -EINVAL; | |
648 | ||
3d8e3ad8 FP |
649 | /* sanity check: values below 1000 millicelcius don't make sense |
650 | * and can cause the system to go into a thermal heart attack | |
651 | */ | |
652 | if (state && state < 1000) | |
653 | return -EINVAL; | |
654 | ||
03a971a2 MG |
655 | if (state && !tz->forced_passive) { |
656 | mutex_lock(&thermal_list_lock); | |
657 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
658 | if (!strncmp("Processor", cdev->type, | |
659 | sizeof("Processor"))) | |
660 | thermal_zone_bind_cooling_device(tz, | |
9d99842f ZR |
661 | THERMAL_TRIPS_NONE, cdev, |
662 | THERMAL_NO_LIMIT, | |
663 | THERMAL_NO_LIMIT); | |
03a971a2 MG |
664 | } |
665 | mutex_unlock(&thermal_list_lock); | |
e4143b03 FP |
666 | if (!tz->passive_delay) |
667 | tz->passive_delay = 1000; | |
03a971a2 MG |
668 | } else 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_unbind_cooling_device(tz, | |
674 | THERMAL_TRIPS_NONE, | |
675 | cdev); | |
676 | } | |
677 | mutex_unlock(&thermal_list_lock); | |
e4143b03 | 678 | tz->passive_delay = 0; |
03a971a2 MG |
679 | } |
680 | ||
03a971a2 MG |
681 | tz->forced_passive = state; |
682 | ||
683 | thermal_zone_device_update(tz); | |
684 | ||
685 | return count; | |
686 | } | |
687 | ||
688 | static ssize_t | |
689 | passive_show(struct device *dev, struct device_attribute *attr, | |
690 | char *buf) | |
691 | { | |
692 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
693 | ||
694 | return sprintf(buf, "%d\n", tz->forced_passive); | |
695 | } | |
696 | ||
5a2c090b D |
697 | static ssize_t |
698 | policy_store(struct device *dev, struct device_attribute *attr, | |
699 | const char *buf, size_t count) | |
700 | { | |
701 | int ret = -EINVAL; | |
702 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
703 | struct thermal_governor *gov; | |
704 | ||
705 | mutex_lock(&thermal_governor_lock); | |
706 | ||
707 | gov = __find_governor(buf); | |
708 | if (!gov) | |
709 | goto exit; | |
710 | ||
711 | tz->governor = gov; | |
712 | ret = count; | |
713 | ||
714 | exit: | |
715 | mutex_unlock(&thermal_governor_lock); | |
716 | return ret; | |
717 | } | |
718 | ||
719 | static ssize_t | |
720 | policy_show(struct device *dev, struct device_attribute *devattr, char *buf) | |
721 | { | |
722 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
723 | ||
724 | return sprintf(buf, "%s\n", tz->governor->name); | |
725 | } | |
726 | ||
e6e238c3 ADK |
727 | #ifdef CONFIG_THERMAL_EMULATION |
728 | static ssize_t | |
729 | emul_temp_store(struct device *dev, struct device_attribute *attr, | |
730 | const char *buf, size_t count) | |
731 | { | |
732 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
733 | int ret = 0; | |
734 | unsigned long temperature; | |
735 | ||
736 | if (kstrtoul(buf, 10, &temperature)) | |
737 | return -EINVAL; | |
738 | ||
739 | if (!tz->ops->set_emul_temp) { | |
740 | mutex_lock(&tz->lock); | |
741 | tz->emul_temperature = temperature; | |
742 | mutex_unlock(&tz->lock); | |
743 | } else { | |
744 | ret = tz->ops->set_emul_temp(tz, temperature); | |
745 | } | |
746 | ||
747 | return ret ? ret : count; | |
748 | } | |
749 | static DEVICE_ATTR(emul_temp, S_IWUSR, NULL, emul_temp_store); | |
750 | #endif/*CONFIG_THERMAL_EMULATION*/ | |
751 | ||
203d3d4a ZR |
752 | static DEVICE_ATTR(type, 0444, type_show, NULL); |
753 | static DEVICE_ATTR(temp, 0444, temp_show, NULL); | |
754 | static DEVICE_ATTR(mode, 0644, mode_show, mode_store); | |
886ee546 | 755 | static DEVICE_ATTR(passive, S_IRUGO | S_IWUSR, passive_show, passive_store); |
5a2c090b | 756 | static DEVICE_ATTR(policy, S_IRUGO | S_IWUSR, policy_show, policy_store); |
203d3d4a | 757 | |
203d3d4a ZR |
758 | /* sys I/F for cooling device */ |
759 | #define to_cooling_device(_dev) \ | |
760 | container_of(_dev, struct thermal_cooling_device, device) | |
761 | ||
762 | static ssize_t | |
763 | thermal_cooling_device_type_show(struct device *dev, | |
764 | struct device_attribute *attr, char *buf) | |
765 | { | |
766 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
767 | ||
768 | return sprintf(buf, "%s\n", cdev->type); | |
769 | } | |
770 | ||
771 | static ssize_t | |
772 | thermal_cooling_device_max_state_show(struct device *dev, | |
773 | struct device_attribute *attr, char *buf) | |
774 | { | |
775 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df MG |
776 | unsigned long state; |
777 | int ret; | |
203d3d4a | 778 | |
6503e5df MG |
779 | ret = cdev->ops->get_max_state(cdev, &state); |
780 | if (ret) | |
781 | return ret; | |
782 | return sprintf(buf, "%ld\n", state); | |
203d3d4a ZR |
783 | } |
784 | ||
785 | static ssize_t | |
786 | thermal_cooling_device_cur_state_show(struct device *dev, | |
787 | struct device_attribute *attr, char *buf) | |
788 | { | |
789 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df MG |
790 | unsigned long state; |
791 | int ret; | |
203d3d4a | 792 | |
6503e5df MG |
793 | ret = cdev->ops->get_cur_state(cdev, &state); |
794 | if (ret) | |
795 | return ret; | |
796 | return sprintf(buf, "%ld\n", state); | |
203d3d4a ZR |
797 | } |
798 | ||
799 | static ssize_t | |
800 | thermal_cooling_device_cur_state_store(struct device *dev, | |
801 | struct device_attribute *attr, | |
802 | const char *buf, size_t count) | |
803 | { | |
804 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df | 805 | unsigned long state; |
203d3d4a ZR |
806 | int result; |
807 | ||
6503e5df | 808 | if (!sscanf(buf, "%ld\n", &state)) |
203d3d4a ZR |
809 | return -EINVAL; |
810 | ||
edb94918 | 811 | if ((long)state < 0) |
203d3d4a ZR |
812 | return -EINVAL; |
813 | ||
814 | result = cdev->ops->set_cur_state(cdev, state); | |
815 | if (result) | |
816 | return result; | |
817 | return count; | |
818 | } | |
819 | ||
820 | static struct device_attribute dev_attr_cdev_type = | |
543a9561 | 821 | __ATTR(type, 0444, thermal_cooling_device_type_show, NULL); |
203d3d4a ZR |
822 | static DEVICE_ATTR(max_state, 0444, |
823 | thermal_cooling_device_max_state_show, NULL); | |
824 | static DEVICE_ATTR(cur_state, 0644, | |
825 | thermal_cooling_device_cur_state_show, | |
826 | thermal_cooling_device_cur_state_store); | |
827 | ||
828 | static ssize_t | |
829 | thermal_cooling_device_trip_point_show(struct device *dev, | |
543a9561 | 830 | struct device_attribute *attr, char *buf) |
203d3d4a | 831 | { |
b81b6ba3 | 832 | struct thermal_instance *instance; |
203d3d4a ZR |
833 | |
834 | instance = | |
b81b6ba3 | 835 | container_of(attr, struct thermal_instance, attr); |
203d3d4a ZR |
836 | |
837 | if (instance->trip == THERMAL_TRIPS_NONE) | |
838 | return sprintf(buf, "-1\n"); | |
839 | else | |
840 | return sprintf(buf, "%d\n", instance->trip); | |
841 | } | |
842 | ||
843 | /* Device management */ | |
844 | ||
16d75239 RH |
845 | #if defined(CONFIG_THERMAL_HWMON) |
846 | ||
e68b16ab ZR |
847 | /* hwmon sys I/F */ |
848 | #include <linux/hwmon.h> | |
31f5396a JD |
849 | |
850 | /* thermal zone devices with the same type share one hwmon device */ | |
851 | struct thermal_hwmon_device { | |
852 | char type[THERMAL_NAME_LENGTH]; | |
853 | struct device *device; | |
854 | int count; | |
855 | struct list_head tz_list; | |
856 | struct list_head node; | |
857 | }; | |
858 | ||
859 | struct thermal_hwmon_attr { | |
860 | struct device_attribute attr; | |
861 | char name[16]; | |
862 | }; | |
863 | ||
864 | /* one temperature input for each thermal zone */ | |
865 | struct thermal_hwmon_temp { | |
866 | struct list_head hwmon_node; | |
867 | struct thermal_zone_device *tz; | |
868 | struct thermal_hwmon_attr temp_input; /* hwmon sys attr */ | |
869 | struct thermal_hwmon_attr temp_crit; /* hwmon sys attr */ | |
870 | }; | |
871 | ||
e68b16ab ZR |
872 | static LIST_HEAD(thermal_hwmon_list); |
873 | ||
874 | static ssize_t | |
875 | name_show(struct device *dev, struct device_attribute *attr, char *buf) | |
876 | { | |
0e968a3b | 877 | struct thermal_hwmon_device *hwmon = dev_get_drvdata(dev); |
e68b16ab ZR |
878 | return sprintf(buf, "%s\n", hwmon->type); |
879 | } | |
880 | static DEVICE_ATTR(name, 0444, name_show, NULL); | |
881 | ||
882 | static ssize_t | |
883 | temp_input_show(struct device *dev, struct device_attribute *attr, char *buf) | |
884 | { | |
6503e5df MG |
885 | long temperature; |
886 | int ret; | |
e68b16ab ZR |
887 | struct thermal_hwmon_attr *hwmon_attr |
888 | = container_of(attr, struct thermal_hwmon_attr, attr); | |
31f5396a JD |
889 | struct thermal_hwmon_temp *temp |
890 | = container_of(hwmon_attr, struct thermal_hwmon_temp, | |
e68b16ab | 891 | temp_input); |
31f5396a | 892 | struct thermal_zone_device *tz = temp->tz; |
e68b16ab | 893 | |
e6e238c3 | 894 | ret = thermal_zone_get_temp(tz, &temperature); |
6503e5df MG |
895 | |
896 | if (ret) | |
897 | return ret; | |
898 | ||
899 | return sprintf(buf, "%ld\n", temperature); | |
e68b16ab ZR |
900 | } |
901 | ||
902 | static ssize_t | |
903 | temp_crit_show(struct device *dev, struct device_attribute *attr, | |
904 | char *buf) | |
905 | { | |
906 | struct thermal_hwmon_attr *hwmon_attr | |
907 | = container_of(attr, struct thermal_hwmon_attr, attr); | |
31f5396a JD |
908 | struct thermal_hwmon_temp *temp |
909 | = container_of(hwmon_attr, struct thermal_hwmon_temp, | |
e68b16ab | 910 | temp_crit); |
31f5396a | 911 | struct thermal_zone_device *tz = temp->tz; |
6503e5df MG |
912 | long temperature; |
913 | int ret; | |
914 | ||
915 | ret = tz->ops->get_trip_temp(tz, 0, &temperature); | |
916 | if (ret) | |
917 | return ret; | |
e68b16ab | 918 | |
6503e5df | 919 | return sprintf(buf, "%ld\n", temperature); |
e68b16ab ZR |
920 | } |
921 | ||
922 | ||
0d97d7a4 JD |
923 | static struct thermal_hwmon_device * |
924 | thermal_hwmon_lookup_by_type(const struct thermal_zone_device *tz) | |
e68b16ab ZR |
925 | { |
926 | struct thermal_hwmon_device *hwmon; | |
e68b16ab ZR |
927 | |
928 | mutex_lock(&thermal_list_lock); | |
929 | list_for_each_entry(hwmon, &thermal_hwmon_list, node) | |
930 | if (!strcmp(hwmon->type, tz->type)) { | |
e68b16ab | 931 | mutex_unlock(&thermal_list_lock); |
0d97d7a4 | 932 | return hwmon; |
e68b16ab ZR |
933 | } |
934 | mutex_unlock(&thermal_list_lock); | |
935 | ||
0d97d7a4 JD |
936 | return NULL; |
937 | } | |
938 | ||
31f5396a JD |
939 | /* Find the temperature input matching a given thermal zone */ |
940 | static struct thermal_hwmon_temp * | |
941 | thermal_hwmon_lookup_temp(const struct thermal_hwmon_device *hwmon, | |
942 | const struct thermal_zone_device *tz) | |
943 | { | |
944 | struct thermal_hwmon_temp *temp; | |
945 | ||
946 | mutex_lock(&thermal_list_lock); | |
947 | list_for_each_entry(temp, &hwmon->tz_list, hwmon_node) | |
948 | if (temp->tz == tz) { | |
949 | mutex_unlock(&thermal_list_lock); | |
950 | return temp; | |
951 | } | |
952 | mutex_unlock(&thermal_list_lock); | |
953 | ||
954 | return NULL; | |
955 | } | |
956 | ||
0d97d7a4 JD |
957 | static int |
958 | thermal_add_hwmon_sysfs(struct thermal_zone_device *tz) | |
959 | { | |
960 | struct thermal_hwmon_device *hwmon; | |
31f5396a | 961 | struct thermal_hwmon_temp *temp; |
0d97d7a4 JD |
962 | int new_hwmon_device = 1; |
963 | int result; | |
964 | ||
965 | hwmon = thermal_hwmon_lookup_by_type(tz); | |
966 | if (hwmon) { | |
967 | new_hwmon_device = 0; | |
968 | goto register_sys_interface; | |
969 | } | |
970 | ||
e68b16ab ZR |
971 | hwmon = kzalloc(sizeof(struct thermal_hwmon_device), GFP_KERNEL); |
972 | if (!hwmon) | |
973 | return -ENOMEM; | |
974 | ||
975 | INIT_LIST_HEAD(&hwmon->tz_list); | |
976 | strlcpy(hwmon->type, tz->type, THERMAL_NAME_LENGTH); | |
977 | hwmon->device = hwmon_device_register(NULL); | |
978 | if (IS_ERR(hwmon->device)) { | |
979 | result = PTR_ERR(hwmon->device); | |
980 | goto free_mem; | |
981 | } | |
0e968a3b | 982 | dev_set_drvdata(hwmon->device, hwmon); |
e68b16ab ZR |
983 | result = device_create_file(hwmon->device, &dev_attr_name); |
984 | if (result) | |
b299eb5c | 985 | goto free_mem; |
e68b16ab ZR |
986 | |
987 | register_sys_interface: | |
31f5396a JD |
988 | temp = kzalloc(sizeof(struct thermal_hwmon_temp), GFP_KERNEL); |
989 | if (!temp) { | |
990 | result = -ENOMEM; | |
991 | goto unregister_name; | |
992 | } | |
993 | ||
994 | temp->tz = tz; | |
e68b16ab ZR |
995 | hwmon->count++; |
996 | ||
79a49168 | 997 | snprintf(temp->temp_input.name, sizeof(temp->temp_input.name), |
e68b16ab | 998 | "temp%d_input", hwmon->count); |
31f5396a JD |
999 | temp->temp_input.attr.attr.name = temp->temp_input.name; |
1000 | temp->temp_input.attr.attr.mode = 0444; | |
1001 | temp->temp_input.attr.show = temp_input_show; | |
1002 | sysfs_attr_init(&temp->temp_input.attr.attr); | |
1003 | result = device_create_file(hwmon->device, &temp->temp_input.attr); | |
e68b16ab | 1004 | if (result) |
31f5396a | 1005 | goto free_temp_mem; |
e68b16ab ZR |
1006 | |
1007 | if (tz->ops->get_crit_temp) { | |
1008 | unsigned long temperature; | |
1009 | if (!tz->ops->get_crit_temp(tz, &temperature)) { | |
79a49168 GR |
1010 | snprintf(temp->temp_crit.name, |
1011 | sizeof(temp->temp_crit.name), | |
e68b16ab | 1012 | "temp%d_crit", hwmon->count); |
31f5396a JD |
1013 | temp->temp_crit.attr.attr.name = temp->temp_crit.name; |
1014 | temp->temp_crit.attr.attr.mode = 0444; | |
1015 | temp->temp_crit.attr.show = temp_crit_show; | |
1016 | sysfs_attr_init(&temp->temp_crit.attr.attr); | |
e68b16ab | 1017 | result = device_create_file(hwmon->device, |
31f5396a | 1018 | &temp->temp_crit.attr); |
e68b16ab | 1019 | if (result) |
b299eb5c | 1020 | goto unregister_input; |
e68b16ab ZR |
1021 | } |
1022 | } | |
1023 | ||
1024 | mutex_lock(&thermal_list_lock); | |
1025 | if (new_hwmon_device) | |
1026 | list_add_tail(&hwmon->node, &thermal_hwmon_list); | |
31f5396a | 1027 | list_add_tail(&temp->hwmon_node, &hwmon->tz_list); |
e68b16ab ZR |
1028 | mutex_unlock(&thermal_list_lock); |
1029 | ||
1030 | return 0; | |
1031 | ||
b299eb5c | 1032 | unregister_input: |
31f5396a JD |
1033 | device_remove_file(hwmon->device, &temp->temp_input.attr); |
1034 | free_temp_mem: | |
1035 | kfree(temp); | |
b299eb5c | 1036 | unregister_name: |
e68b16ab ZR |
1037 | if (new_hwmon_device) { |
1038 | device_remove_file(hwmon->device, &dev_attr_name); | |
1039 | hwmon_device_unregister(hwmon->device); | |
1040 | } | |
1041 | free_mem: | |
1042 | if (new_hwmon_device) | |
1043 | kfree(hwmon); | |
1044 | ||
1045 | return result; | |
1046 | } | |
1047 | ||
1048 | static void | |
1049 | thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz) | |
1050 | { | |
31f5396a JD |
1051 | struct thermal_hwmon_device *hwmon; |
1052 | struct thermal_hwmon_temp *temp; | |
1053 | ||
1054 | hwmon = thermal_hwmon_lookup_by_type(tz); | |
1055 | if (unlikely(!hwmon)) { | |
1056 | /* Should never happen... */ | |
1057 | dev_dbg(&tz->device, "hwmon device lookup failed!\n"); | |
1058 | return; | |
1059 | } | |
1060 | ||
1061 | temp = thermal_hwmon_lookup_temp(hwmon, tz); | |
1062 | if (unlikely(!temp)) { | |
1063 | /* Should never happen... */ | |
1064 | dev_dbg(&tz->device, "temperature input lookup failed!\n"); | |
1065 | return; | |
1066 | } | |
e68b16ab | 1067 | |
31f5396a | 1068 | device_remove_file(hwmon->device, &temp->temp_input.attr); |
b299eb5c | 1069 | if (tz->ops->get_crit_temp) |
31f5396a | 1070 | device_remove_file(hwmon->device, &temp->temp_crit.attr); |
e68b16ab ZR |
1071 | |
1072 | mutex_lock(&thermal_list_lock); | |
31f5396a JD |
1073 | list_del(&temp->hwmon_node); |
1074 | kfree(temp); | |
e68b16ab ZR |
1075 | if (!list_empty(&hwmon->tz_list)) { |
1076 | mutex_unlock(&thermal_list_lock); | |
1077 | return; | |
1078 | } | |
1079 | list_del(&hwmon->node); | |
1080 | mutex_unlock(&thermal_list_lock); | |
1081 | ||
1082 | device_remove_file(hwmon->device, &dev_attr_name); | |
1083 | hwmon_device_unregister(hwmon->device); | |
1084 | kfree(hwmon); | |
1085 | } | |
1086 | #else | |
1087 | static int | |
1088 | thermal_add_hwmon_sysfs(struct thermal_zone_device *tz) | |
1089 | { | |
1090 | return 0; | |
1091 | } | |
1092 | ||
1093 | static void | |
1094 | thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz) | |
1095 | { | |
1096 | } | |
1097 | #endif | |
1098 | ||
203d3d4a ZR |
1099 | /** |
1100 | * thermal_zone_bind_cooling_device - bind a cooling device to a thermal zone | |
203d3d4a ZR |
1101 | * @tz: thermal zone device |
1102 | * @trip: indicates which trip point the cooling devices is | |
1103 | * associated with in this thermal zone. | |
1104 | * @cdev: thermal cooling device | |
543a9561 LB |
1105 | * |
1106 | * This function is usually called in the thermal zone device .bind callback. | |
203d3d4a ZR |
1107 | */ |
1108 | int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, | |
1109 | int trip, | |
9d99842f ZR |
1110 | struct thermal_cooling_device *cdev, |
1111 | unsigned long upper, unsigned long lower) | |
203d3d4a | 1112 | { |
b81b6ba3 ZR |
1113 | struct thermal_instance *dev; |
1114 | struct thermal_instance *pos; | |
c7516709 TS |
1115 | struct thermal_zone_device *pos1; |
1116 | struct thermal_cooling_device *pos2; | |
74051ba5 | 1117 | unsigned long max_state; |
203d3d4a ZR |
1118 | int result; |
1119 | ||
543a9561 | 1120 | if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE)) |
203d3d4a ZR |
1121 | return -EINVAL; |
1122 | ||
c7516709 TS |
1123 | list_for_each_entry(pos1, &thermal_tz_list, node) { |
1124 | if (pos1 == tz) | |
1125 | break; | |
1126 | } | |
1127 | list_for_each_entry(pos2, &thermal_cdev_list, node) { | |
1128 | if (pos2 == cdev) | |
1129 | break; | |
1130 | } | |
1131 | ||
1132 | if (tz != pos1 || cdev != pos2) | |
203d3d4a ZR |
1133 | return -EINVAL; |
1134 | ||
9d99842f ZR |
1135 | cdev->ops->get_max_state(cdev, &max_state); |
1136 | ||
1137 | /* lower default 0, upper default max_state */ | |
1138 | lower = lower == THERMAL_NO_LIMIT ? 0 : lower; | |
1139 | upper = upper == THERMAL_NO_LIMIT ? max_state : upper; | |
1140 | ||
1141 | if (lower > upper || upper > max_state) | |
1142 | return -EINVAL; | |
1143 | ||
203d3d4a | 1144 | dev = |
b81b6ba3 | 1145 | kzalloc(sizeof(struct thermal_instance), GFP_KERNEL); |
203d3d4a ZR |
1146 | if (!dev) |
1147 | return -ENOMEM; | |
1148 | dev->tz = tz; | |
1149 | dev->cdev = cdev; | |
1150 | dev->trip = trip; | |
9d99842f ZR |
1151 | dev->upper = upper; |
1152 | dev->lower = lower; | |
ce119f83 | 1153 | dev->target = THERMAL_NO_TARGET; |
74051ba5 | 1154 | |
203d3d4a ZR |
1155 | result = get_idr(&tz->idr, &tz->lock, &dev->id); |
1156 | if (result) | |
1157 | goto free_mem; | |
1158 | ||
1159 | sprintf(dev->name, "cdev%d", dev->id); | |
1160 | result = | |
1161 | sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev->name); | |
1162 | if (result) | |
1163 | goto release_idr; | |
1164 | ||
1165 | sprintf(dev->attr_name, "cdev%d_trip_point", dev->id); | |
975f8c56 | 1166 | sysfs_attr_init(&dev->attr.attr); |
203d3d4a ZR |
1167 | dev->attr.attr.name = dev->attr_name; |
1168 | dev->attr.attr.mode = 0444; | |
1169 | dev->attr.show = thermal_cooling_device_trip_point_show; | |
1170 | result = device_create_file(&tz->device, &dev->attr); | |
1171 | if (result) | |
1172 | goto remove_symbol_link; | |
1173 | ||
1174 | mutex_lock(&tz->lock); | |
f4a821ce | 1175 | mutex_lock(&cdev->lock); |
cddf31b3 | 1176 | list_for_each_entry(pos, &tz->thermal_instances, tz_node) |
203d3d4a ZR |
1177 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
1178 | result = -EEXIST; | |
1179 | break; | |
1180 | } | |
b5e4ae62 | 1181 | if (!result) { |
cddf31b3 | 1182 | list_add_tail(&dev->tz_node, &tz->thermal_instances); |
b5e4ae62 ZR |
1183 | list_add_tail(&dev->cdev_node, &cdev->thermal_instances); |
1184 | } | |
f4a821ce | 1185 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
1186 | mutex_unlock(&tz->lock); |
1187 | ||
1188 | if (!result) | |
1189 | return 0; | |
1190 | ||
1191 | device_remove_file(&tz->device, &dev->attr); | |
caca8b80 | 1192 | remove_symbol_link: |
203d3d4a | 1193 | sysfs_remove_link(&tz->device.kobj, dev->name); |
caca8b80 | 1194 | release_idr: |
203d3d4a | 1195 | release_idr(&tz->idr, &tz->lock, dev->id); |
caca8b80 | 1196 | free_mem: |
203d3d4a ZR |
1197 | kfree(dev); |
1198 | return result; | |
1199 | } | |
1200 | EXPORT_SYMBOL(thermal_zone_bind_cooling_device); | |
1201 | ||
1202 | /** | |
1203 | * thermal_zone_unbind_cooling_device - unbind a cooling device from a thermal zone | |
203d3d4a ZR |
1204 | * @tz: thermal zone device |
1205 | * @trip: indicates which trip point the cooling devices is | |
1206 | * associated with in this thermal zone. | |
1207 | * @cdev: thermal cooling device | |
543a9561 LB |
1208 | * |
1209 | * This function is usually called in the thermal zone device .unbind callback. | |
203d3d4a ZR |
1210 | */ |
1211 | int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz, | |
1212 | int trip, | |
1213 | struct thermal_cooling_device *cdev) | |
1214 | { | |
b81b6ba3 | 1215 | struct thermal_instance *pos, *next; |
203d3d4a ZR |
1216 | |
1217 | mutex_lock(&tz->lock); | |
f4a821ce | 1218 | mutex_lock(&cdev->lock); |
cddf31b3 | 1219 | list_for_each_entry_safe(pos, next, &tz->thermal_instances, tz_node) { |
543a9561 | 1220 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
cddf31b3 | 1221 | list_del(&pos->tz_node); |
b5e4ae62 | 1222 | list_del(&pos->cdev_node); |
f4a821ce | 1223 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
1224 | mutex_unlock(&tz->lock); |
1225 | goto unbind; | |
1226 | } | |
1227 | } | |
f4a821ce | 1228 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
1229 | mutex_unlock(&tz->lock); |
1230 | ||
1231 | return -ENODEV; | |
1232 | ||
caca8b80 | 1233 | unbind: |
203d3d4a ZR |
1234 | device_remove_file(&tz->device, &pos->attr); |
1235 | sysfs_remove_link(&tz->device.kobj, pos->name); | |
1236 | release_idr(&tz->idr, &tz->lock, pos->id); | |
1237 | kfree(pos); | |
1238 | return 0; | |
1239 | } | |
1240 | EXPORT_SYMBOL(thermal_zone_unbind_cooling_device); | |
1241 | ||
1242 | static void thermal_release(struct device *dev) | |
1243 | { | |
1244 | struct thermal_zone_device *tz; | |
1245 | struct thermal_cooling_device *cdev; | |
1246 | ||
caca8b80 JP |
1247 | if (!strncmp(dev_name(dev), "thermal_zone", |
1248 | sizeof("thermal_zone") - 1)) { | |
203d3d4a ZR |
1249 | tz = to_thermal_zone(dev); |
1250 | kfree(tz); | |
1251 | } else { | |
1252 | cdev = to_cooling_device(dev); | |
1253 | kfree(cdev); | |
1254 | } | |
1255 | } | |
1256 | ||
1257 | static struct class thermal_class = { | |
1258 | .name = "thermal", | |
1259 | .dev_release = thermal_release, | |
1260 | }; | |
1261 | ||
1262 | /** | |
1263 | * thermal_cooling_device_register - register a new thermal cooling device | |
1264 | * @type: the thermal cooling device type. | |
1265 | * @devdata: device private data. | |
1266 | * @ops: standard thermal cooling devices callbacks. | |
1267 | */ | |
caca8b80 JP |
1268 | struct thermal_cooling_device * |
1269 | thermal_cooling_device_register(char *type, void *devdata, | |
1270 | const struct thermal_cooling_device_ops *ops) | |
203d3d4a ZR |
1271 | { |
1272 | struct thermal_cooling_device *cdev; | |
203d3d4a ZR |
1273 | int result; |
1274 | ||
204dd1d3 | 1275 | if (type && strlen(type) >= THERMAL_NAME_LENGTH) |
3e6fda5c | 1276 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1277 | |
1278 | if (!ops || !ops->get_max_state || !ops->get_cur_state || | |
543a9561 | 1279 | !ops->set_cur_state) |
3e6fda5c | 1280 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1281 | |
1282 | cdev = kzalloc(sizeof(struct thermal_cooling_device), GFP_KERNEL); | |
1283 | if (!cdev) | |
3e6fda5c | 1284 | return ERR_PTR(-ENOMEM); |
203d3d4a ZR |
1285 | |
1286 | result = get_idr(&thermal_cdev_idr, &thermal_idr_lock, &cdev->id); | |
1287 | if (result) { | |
1288 | kfree(cdev); | |
3e6fda5c | 1289 | return ERR_PTR(result); |
203d3d4a ZR |
1290 | } |
1291 | ||
204dd1d3 | 1292 | strcpy(cdev->type, type ? : ""); |
f4a821ce | 1293 | mutex_init(&cdev->lock); |
b5e4ae62 | 1294 | INIT_LIST_HEAD(&cdev->thermal_instances); |
203d3d4a | 1295 | cdev->ops = ops; |
ce119f83 | 1296 | cdev->updated = true; |
203d3d4a ZR |
1297 | cdev->device.class = &thermal_class; |
1298 | cdev->devdata = devdata; | |
354655ea | 1299 | dev_set_name(&cdev->device, "cooling_device%d", cdev->id); |
203d3d4a ZR |
1300 | result = device_register(&cdev->device); |
1301 | if (result) { | |
1302 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
1303 | kfree(cdev); | |
3e6fda5c | 1304 | return ERR_PTR(result); |
203d3d4a ZR |
1305 | } |
1306 | ||
1307 | /* sys I/F */ | |
1308 | if (type) { | |
543a9561 | 1309 | result = device_create_file(&cdev->device, &dev_attr_cdev_type); |
203d3d4a ZR |
1310 | if (result) |
1311 | goto unregister; | |
1312 | } | |
1313 | ||
1314 | result = device_create_file(&cdev->device, &dev_attr_max_state); | |
1315 | if (result) | |
1316 | goto unregister; | |
1317 | ||
1318 | result = device_create_file(&cdev->device, &dev_attr_cur_state); | |
1319 | if (result) | |
1320 | goto unregister; | |
1321 | ||
7e8ee1e9 | 1322 | /* Add 'this' new cdev to the global cdev list */ |
203d3d4a ZR |
1323 | mutex_lock(&thermal_list_lock); |
1324 | list_add(&cdev->node, &thermal_cdev_list); | |
203d3d4a ZR |
1325 | mutex_unlock(&thermal_list_lock); |
1326 | ||
7e8ee1e9 D |
1327 | /* Update binding information for 'this' new cdev */ |
1328 | bind_cdev(cdev); | |
1329 | ||
1330 | return cdev; | |
203d3d4a | 1331 | |
caca8b80 | 1332 | unregister: |
203d3d4a ZR |
1333 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); |
1334 | device_unregister(&cdev->device); | |
3e6fda5c | 1335 | return ERR_PTR(result); |
203d3d4a ZR |
1336 | } |
1337 | EXPORT_SYMBOL(thermal_cooling_device_register); | |
1338 | ||
1339 | /** | |
1340 | * thermal_cooling_device_unregister - removes the registered thermal cooling device | |
203d3d4a ZR |
1341 | * @cdev: the thermal cooling device to remove. |
1342 | * | |
1343 | * thermal_cooling_device_unregister() must be called when the device is no | |
1344 | * longer needed. | |
1345 | */ | |
7e8ee1e9 | 1346 | void thermal_cooling_device_unregister(struct thermal_cooling_device *cdev) |
203d3d4a | 1347 | { |
7e8ee1e9 D |
1348 | int i; |
1349 | const struct thermal_zone_params *tzp; | |
203d3d4a ZR |
1350 | struct thermal_zone_device *tz; |
1351 | struct thermal_cooling_device *pos = NULL; | |
1352 | ||
1353 | if (!cdev) | |
1354 | return; | |
1355 | ||
1356 | mutex_lock(&thermal_list_lock); | |
1357 | list_for_each_entry(pos, &thermal_cdev_list, node) | |
1358 | if (pos == cdev) | |
1359 | break; | |
1360 | if (pos != cdev) { | |
1361 | /* thermal cooling device not found */ | |
1362 | mutex_unlock(&thermal_list_lock); | |
1363 | return; | |
1364 | } | |
1365 | list_del(&cdev->node); | |
7e8ee1e9 D |
1366 | |
1367 | /* Unbind all thermal zones associated with 'this' cdev */ | |
203d3d4a | 1368 | list_for_each_entry(tz, &thermal_tz_list, node) { |
7e8ee1e9 D |
1369 | if (tz->ops->unbind) { |
1370 | tz->ops->unbind(tz, cdev); | |
1371 | continue; | |
1372 | } | |
1373 | ||
1374 | if (!tz->tzp || !tz->tzp->tbp) | |
203d3d4a | 1375 | continue; |
7e8ee1e9 D |
1376 | |
1377 | tzp = tz->tzp; | |
1378 | for (i = 0; i < tzp->num_tbps; i++) { | |
1379 | if (tzp->tbp[i].cdev == cdev) { | |
1380 | __unbind(tz, tzp->tbp[i].trip_mask, cdev); | |
1381 | tzp->tbp[i].cdev = NULL; | |
1382 | } | |
1383 | } | |
203d3d4a | 1384 | } |
7e8ee1e9 | 1385 | |
203d3d4a | 1386 | mutex_unlock(&thermal_list_lock); |
7e8ee1e9 | 1387 | |
203d3d4a | 1388 | if (cdev->type[0]) |
543a9561 | 1389 | device_remove_file(&cdev->device, &dev_attr_cdev_type); |
203d3d4a ZR |
1390 | device_remove_file(&cdev->device, &dev_attr_max_state); |
1391 | device_remove_file(&cdev->device, &dev_attr_cur_state); | |
1392 | ||
1393 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
1394 | device_unregister(&cdev->device); | |
1395 | return; | |
1396 | } | |
1397 | EXPORT_SYMBOL(thermal_cooling_device_unregister); | |
1398 | ||
dc765482 | 1399 | void thermal_cdev_update(struct thermal_cooling_device *cdev) |
ce119f83 ZR |
1400 | { |
1401 | struct thermal_instance *instance; | |
1402 | unsigned long target = 0; | |
1403 | ||
1404 | /* cooling device is updated*/ | |
1405 | if (cdev->updated) | |
1406 | return; | |
1407 | ||
f4a821ce | 1408 | mutex_lock(&cdev->lock); |
ce119f83 ZR |
1409 | /* Make sure cdev enters the deepest cooling state */ |
1410 | list_for_each_entry(instance, &cdev->thermal_instances, cdev_node) { | |
1411 | if (instance->target == THERMAL_NO_TARGET) | |
1412 | continue; | |
1413 | if (instance->target > target) | |
1414 | target = instance->target; | |
1415 | } | |
f4a821ce | 1416 | mutex_unlock(&cdev->lock); |
ce119f83 ZR |
1417 | cdev->ops->set_cur_state(cdev, target); |
1418 | cdev->updated = true; | |
1419 | } | |
dc765482 | 1420 | EXPORT_SYMBOL(thermal_cdev_update); |
ce119f83 | 1421 | |
f2b4caaf D |
1422 | /** |
1423 | * notify_thermal_framework - Sensor drivers use this API to notify framework | |
1424 | * @tz: thermal zone device | |
1425 | * @trip: indicates which trip point has been crossed | |
1426 | * | |
1427 | * This function handles the trip events from sensor drivers. It starts | |
1428 | * throttling the cooling devices according to the policy configured. | |
1429 | * For CRITICAL and HOT trip points, this notifies the respective drivers, | |
1430 | * and does actual throttling for other trip points i.e ACTIVE and PASSIVE. | |
1431 | * The throttling policy is based on the configured platform data; if no | |
1432 | * platform data is provided, this uses the step_wise throttling policy. | |
1433 | */ | |
1434 | void notify_thermal_framework(struct thermal_zone_device *tz, int trip) | |
1435 | { | |
1436 | handle_thermal_trip(tz, trip); | |
1437 | } | |
1438 | EXPORT_SYMBOL(notify_thermal_framework); | |
1439 | ||
c56f5c03 D |
1440 | /** |
1441 | * create_trip_attrs - create attributes for trip points | |
1442 | * @tz: the thermal zone device | |
1443 | * @mask: Writeable trip point bitmap. | |
1444 | */ | |
1445 | static int create_trip_attrs(struct thermal_zone_device *tz, int mask) | |
1446 | { | |
1447 | int indx; | |
27365a6c | 1448 | int size = sizeof(struct thermal_attr) * tz->trips; |
c56f5c03 | 1449 | |
27365a6c | 1450 | tz->trip_type_attrs = kzalloc(size, GFP_KERNEL); |
c56f5c03 D |
1451 | if (!tz->trip_type_attrs) |
1452 | return -ENOMEM; | |
1453 | ||
27365a6c | 1454 | tz->trip_temp_attrs = kzalloc(size, GFP_KERNEL); |
c56f5c03 D |
1455 | if (!tz->trip_temp_attrs) { |
1456 | kfree(tz->trip_type_attrs); | |
1457 | return -ENOMEM; | |
1458 | } | |
1459 | ||
27365a6c D |
1460 | if (tz->ops->get_trip_hyst) { |
1461 | tz->trip_hyst_attrs = kzalloc(size, GFP_KERNEL); | |
1462 | if (!tz->trip_hyst_attrs) { | |
1463 | kfree(tz->trip_type_attrs); | |
1464 | kfree(tz->trip_temp_attrs); | |
1465 | return -ENOMEM; | |
1466 | } | |
1467 | } | |
c56f5c03 | 1468 | |
27365a6c D |
1469 | |
1470 | for (indx = 0; indx < tz->trips; indx++) { | |
c56f5c03 D |
1471 | /* create trip type attribute */ |
1472 | snprintf(tz->trip_type_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1473 | "trip_point_%d_type", indx); | |
1474 | ||
1475 | sysfs_attr_init(&tz->trip_type_attrs[indx].attr.attr); | |
1476 | tz->trip_type_attrs[indx].attr.attr.name = | |
1477 | tz->trip_type_attrs[indx].name; | |
1478 | tz->trip_type_attrs[indx].attr.attr.mode = S_IRUGO; | |
1479 | tz->trip_type_attrs[indx].attr.show = trip_point_type_show; | |
1480 | ||
1481 | device_create_file(&tz->device, | |
1482 | &tz->trip_type_attrs[indx].attr); | |
1483 | ||
1484 | /* create trip temp attribute */ | |
1485 | snprintf(tz->trip_temp_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1486 | "trip_point_%d_temp", indx); | |
1487 | ||
1488 | sysfs_attr_init(&tz->trip_temp_attrs[indx].attr.attr); | |
1489 | tz->trip_temp_attrs[indx].attr.attr.name = | |
1490 | tz->trip_temp_attrs[indx].name; | |
1491 | tz->trip_temp_attrs[indx].attr.attr.mode = S_IRUGO; | |
1492 | tz->trip_temp_attrs[indx].attr.show = trip_point_temp_show; | |
1493 | if (mask & (1 << indx)) { | |
1494 | tz->trip_temp_attrs[indx].attr.attr.mode |= S_IWUSR; | |
1495 | tz->trip_temp_attrs[indx].attr.store = | |
1496 | trip_point_temp_store; | |
1497 | } | |
1498 | ||
1499 | device_create_file(&tz->device, | |
1500 | &tz->trip_temp_attrs[indx].attr); | |
27365a6c D |
1501 | |
1502 | /* create Optional trip hyst attribute */ | |
1503 | if (!tz->ops->get_trip_hyst) | |
1504 | continue; | |
1505 | snprintf(tz->trip_hyst_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1506 | "trip_point_%d_hyst", indx); | |
1507 | ||
1508 | sysfs_attr_init(&tz->trip_hyst_attrs[indx].attr.attr); | |
1509 | tz->trip_hyst_attrs[indx].attr.attr.name = | |
1510 | tz->trip_hyst_attrs[indx].name; | |
1511 | tz->trip_hyst_attrs[indx].attr.attr.mode = S_IRUGO; | |
1512 | tz->trip_hyst_attrs[indx].attr.show = trip_point_hyst_show; | |
1513 | if (tz->ops->set_trip_hyst) { | |
1514 | tz->trip_hyst_attrs[indx].attr.attr.mode |= S_IWUSR; | |
1515 | tz->trip_hyst_attrs[indx].attr.store = | |
1516 | trip_point_hyst_store; | |
1517 | } | |
1518 | ||
1519 | device_create_file(&tz->device, | |
1520 | &tz->trip_hyst_attrs[indx].attr); | |
c56f5c03 D |
1521 | } |
1522 | return 0; | |
1523 | } | |
1524 | ||
1525 | static void remove_trip_attrs(struct thermal_zone_device *tz) | |
1526 | { | |
1527 | int indx; | |
1528 | ||
1529 | for (indx = 0; indx < tz->trips; indx++) { | |
1530 | device_remove_file(&tz->device, | |
1531 | &tz->trip_type_attrs[indx].attr); | |
1532 | device_remove_file(&tz->device, | |
1533 | &tz->trip_temp_attrs[indx].attr); | |
27365a6c D |
1534 | if (tz->ops->get_trip_hyst) |
1535 | device_remove_file(&tz->device, | |
1536 | &tz->trip_hyst_attrs[indx].attr); | |
c56f5c03 D |
1537 | } |
1538 | kfree(tz->trip_type_attrs); | |
1539 | kfree(tz->trip_temp_attrs); | |
27365a6c | 1540 | kfree(tz->trip_hyst_attrs); |
c56f5c03 D |
1541 | } |
1542 | ||
203d3d4a ZR |
1543 | /** |
1544 | * thermal_zone_device_register - register a new thermal zone device | |
1545 | * @type: the thermal zone device type | |
1546 | * @trips: the number of trip points the thermal zone support | |
c56f5c03 | 1547 | * @mask: a bit string indicating the writeablility of trip points |
203d3d4a ZR |
1548 | * @devdata: private device data |
1549 | * @ops: standard thermal zone device callbacks | |
50125a9b | 1550 | * @tzp: thermal zone platform parameters |
b1569e99 MG |
1551 | * @passive_delay: number of milliseconds to wait between polls when |
1552 | * performing passive cooling | |
1553 | * @polling_delay: number of milliseconds to wait between polls when checking | |
1554 | * whether trip points have been crossed (0 for interrupt | |
1555 | * driven systems) | |
203d3d4a ZR |
1556 | * |
1557 | * thermal_zone_device_unregister() must be called when the device is no | |
1b7ddb84 | 1558 | * longer needed. The passive cooling depends on the .get_trend() return value. |
203d3d4a | 1559 | */ |
4b1bf587 | 1560 | struct thermal_zone_device *thermal_zone_device_register(const char *type, |
c56f5c03 | 1561 | int trips, int mask, void *devdata, |
5b275ce2 | 1562 | const struct thermal_zone_device_ops *ops, |
50125a9b | 1563 | const struct thermal_zone_params *tzp, |
1b7ddb84 | 1564 | int passive_delay, int polling_delay) |
203d3d4a ZR |
1565 | { |
1566 | struct thermal_zone_device *tz; | |
03a971a2 | 1567 | enum thermal_trip_type trip_type; |
203d3d4a ZR |
1568 | int result; |
1569 | int count; | |
03a971a2 | 1570 | int passive = 0; |
203d3d4a | 1571 | |
204dd1d3 | 1572 | if (type && strlen(type) >= THERMAL_NAME_LENGTH) |
3e6fda5c | 1573 | return ERR_PTR(-EINVAL); |
203d3d4a | 1574 | |
c56f5c03 | 1575 | if (trips > THERMAL_MAX_TRIPS || trips < 0 || mask >> trips) |
3e6fda5c | 1576 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1577 | |
1578 | if (!ops || !ops->get_temp) | |
3e6fda5c | 1579 | return ERR_PTR(-EINVAL); |
203d3d4a | 1580 | |
6b2aa51d EV |
1581 | if (trips > 0 && !ops->get_trip_type) |
1582 | return ERR_PTR(-EINVAL); | |
1583 | ||
203d3d4a ZR |
1584 | tz = kzalloc(sizeof(struct thermal_zone_device), GFP_KERNEL); |
1585 | if (!tz) | |
3e6fda5c | 1586 | return ERR_PTR(-ENOMEM); |
203d3d4a | 1587 | |
2d374139 | 1588 | INIT_LIST_HEAD(&tz->thermal_instances); |
203d3d4a ZR |
1589 | idr_init(&tz->idr); |
1590 | mutex_init(&tz->lock); | |
1591 | result = get_idr(&thermal_tz_idr, &thermal_idr_lock, &tz->id); | |
1592 | if (result) { | |
1593 | kfree(tz); | |
3e6fda5c | 1594 | return ERR_PTR(result); |
203d3d4a ZR |
1595 | } |
1596 | ||
204dd1d3 | 1597 | strcpy(tz->type, type ? : ""); |
203d3d4a | 1598 | tz->ops = ops; |
50125a9b | 1599 | tz->tzp = tzp; |
203d3d4a ZR |
1600 | tz->device.class = &thermal_class; |
1601 | tz->devdata = devdata; | |
1602 | tz->trips = trips; | |
b1569e99 MG |
1603 | tz->passive_delay = passive_delay; |
1604 | tz->polling_delay = polling_delay; | |
1605 | ||
354655ea | 1606 | dev_set_name(&tz->device, "thermal_zone%d", tz->id); |
203d3d4a ZR |
1607 | result = device_register(&tz->device); |
1608 | if (result) { | |
1609 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); | |
1610 | kfree(tz); | |
3e6fda5c | 1611 | return ERR_PTR(result); |
203d3d4a ZR |
1612 | } |
1613 | ||
1614 | /* sys I/F */ | |
1615 | if (type) { | |
1616 | result = device_create_file(&tz->device, &dev_attr_type); | |
1617 | if (result) | |
1618 | goto unregister; | |
1619 | } | |
1620 | ||
1621 | result = device_create_file(&tz->device, &dev_attr_temp); | |
1622 | if (result) | |
1623 | goto unregister; | |
1624 | ||
1625 | if (ops->get_mode) { | |
1626 | result = device_create_file(&tz->device, &dev_attr_mode); | |
1627 | if (result) | |
1628 | goto unregister; | |
1629 | } | |
1630 | ||
c56f5c03 D |
1631 | result = create_trip_attrs(tz, mask); |
1632 | if (result) | |
1633 | goto unregister; | |
1634 | ||
203d3d4a | 1635 | for (count = 0; count < trips; count++) { |
03a971a2 MG |
1636 | tz->ops->get_trip_type(tz, count, &trip_type); |
1637 | if (trip_type == THERMAL_TRIP_PASSIVE) | |
1638 | passive = 1; | |
203d3d4a ZR |
1639 | } |
1640 | ||
5a2c090b D |
1641 | if (!passive) { |
1642 | result = device_create_file(&tz->device, &dev_attr_passive); | |
1643 | if (result) | |
1644 | goto unregister; | |
1645 | } | |
03a971a2 | 1646 | |
e6e238c3 ADK |
1647 | #ifdef CONFIG_THERMAL_EMULATION |
1648 | result = device_create_file(&tz->device, &dev_attr_emul_temp); | |
1649 | if (result) | |
1650 | goto unregister; | |
1651 | #endif | |
5a2c090b D |
1652 | /* Create policy attribute */ |
1653 | result = device_create_file(&tz->device, &dev_attr_policy); | |
03a971a2 MG |
1654 | if (result) |
1655 | goto unregister; | |
1656 | ||
a4a15485 D |
1657 | /* Update 'this' zone's governor information */ |
1658 | mutex_lock(&thermal_governor_lock); | |
1659 | ||
1660 | if (tz->tzp) | |
1661 | tz->governor = __find_governor(tz->tzp->governor_name); | |
1662 | else | |
1663 | tz->governor = __find_governor(DEFAULT_THERMAL_GOVERNOR); | |
1664 | ||
1665 | mutex_unlock(&thermal_governor_lock); | |
1666 | ||
e68b16ab ZR |
1667 | result = thermal_add_hwmon_sysfs(tz); |
1668 | if (result) | |
1669 | goto unregister; | |
1670 | ||
203d3d4a ZR |
1671 | mutex_lock(&thermal_list_lock); |
1672 | list_add_tail(&tz->node, &thermal_tz_list); | |
203d3d4a ZR |
1673 | mutex_unlock(&thermal_list_lock); |
1674 | ||
7e8ee1e9 D |
1675 | /* Bind cooling devices for this zone */ |
1676 | bind_tz(tz); | |
1677 | ||
b1569e99 MG |
1678 | INIT_DELAYED_WORK(&(tz->poll_queue), thermal_zone_device_check); |
1679 | ||
1680 | thermal_zone_device_update(tz); | |
1681 | ||
203d3d4a ZR |
1682 | if (!result) |
1683 | return tz; | |
1684 | ||
caca8b80 | 1685 | unregister: |
203d3d4a ZR |
1686 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1687 | device_unregister(&tz->device); | |
3e6fda5c | 1688 | return ERR_PTR(result); |
203d3d4a ZR |
1689 | } |
1690 | EXPORT_SYMBOL(thermal_zone_device_register); | |
1691 | ||
1692 | /** | |
1693 | * thermal_device_unregister - removes the registered thermal zone device | |
203d3d4a ZR |
1694 | * @tz: the thermal zone device to remove |
1695 | */ | |
1696 | void thermal_zone_device_unregister(struct thermal_zone_device *tz) | |
1697 | { | |
7e8ee1e9 D |
1698 | int i; |
1699 | const struct thermal_zone_params *tzp; | |
203d3d4a ZR |
1700 | struct thermal_cooling_device *cdev; |
1701 | struct thermal_zone_device *pos = NULL; | |
203d3d4a ZR |
1702 | |
1703 | if (!tz) | |
1704 | return; | |
1705 | ||
7e8ee1e9 D |
1706 | tzp = tz->tzp; |
1707 | ||
203d3d4a ZR |
1708 | mutex_lock(&thermal_list_lock); |
1709 | list_for_each_entry(pos, &thermal_tz_list, node) | |
1710 | if (pos == tz) | |
1711 | break; | |
1712 | if (pos != tz) { | |
1713 | /* thermal zone device not found */ | |
1714 | mutex_unlock(&thermal_list_lock); | |
1715 | return; | |
1716 | } | |
1717 | list_del(&tz->node); | |
7e8ee1e9 D |
1718 | |
1719 | /* Unbind all cdevs associated with 'this' thermal zone */ | |
1720 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
1721 | if (tz->ops->unbind) { | |
1722 | tz->ops->unbind(tz, cdev); | |
1723 | continue; | |
1724 | } | |
1725 | ||
1726 | if (!tzp || !tzp->tbp) | |
1727 | break; | |
1728 | ||
1729 | for (i = 0; i < tzp->num_tbps; i++) { | |
1730 | if (tzp->tbp[i].cdev == cdev) { | |
1731 | __unbind(tz, tzp->tbp[i].trip_mask, cdev); | |
1732 | tzp->tbp[i].cdev = NULL; | |
1733 | } | |
1734 | } | |
1735 | } | |
1736 | ||
203d3d4a ZR |
1737 | mutex_unlock(&thermal_list_lock); |
1738 | ||
b1569e99 MG |
1739 | thermal_zone_device_set_polling(tz, 0); |
1740 | ||
203d3d4a ZR |
1741 | if (tz->type[0]) |
1742 | device_remove_file(&tz->device, &dev_attr_type); | |
1743 | device_remove_file(&tz->device, &dev_attr_temp); | |
1744 | if (tz->ops->get_mode) | |
1745 | device_remove_file(&tz->device, &dev_attr_mode); | |
5a2c090b | 1746 | device_remove_file(&tz->device, &dev_attr_policy); |
c56f5c03 | 1747 | remove_trip_attrs(tz); |
a4a15485 | 1748 | tz->governor = NULL; |
203d3d4a | 1749 | |
e68b16ab | 1750 | thermal_remove_hwmon_sysfs(tz); |
203d3d4a ZR |
1751 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1752 | idr_destroy(&tz->idr); | |
1753 | mutex_destroy(&tz->lock); | |
1754 | device_unregister(&tz->device); | |
1755 | return; | |
1756 | } | |
1757 | EXPORT_SYMBOL(thermal_zone_device_unregister); | |
1758 | ||
af06216a RW |
1759 | #ifdef CONFIG_NET |
1760 | static struct genl_family thermal_event_genl_family = { | |
1761 | .id = GENL_ID_GENERATE, | |
1762 | .name = THERMAL_GENL_FAMILY_NAME, | |
1763 | .version = THERMAL_GENL_VERSION, | |
1764 | .maxattr = THERMAL_GENL_ATTR_MAX, | |
1765 | }; | |
1766 | ||
1767 | static struct genl_multicast_group thermal_event_mcgrp = { | |
1768 | .name = THERMAL_GENL_MCAST_GROUP_NAME, | |
1769 | }; | |
1770 | ||
8ab3e6a0 EV |
1771 | int thermal_generate_netlink_event(struct thermal_zone_device *tz, |
1772 | enum events event) | |
4cb18728 D |
1773 | { |
1774 | struct sk_buff *skb; | |
1775 | struct nlattr *attr; | |
1776 | struct thermal_genl_event *thermal_event; | |
1777 | void *msg_header; | |
1778 | int size; | |
1779 | int result; | |
b11de07c | 1780 | static unsigned int thermal_event_seqnum; |
4cb18728 | 1781 | |
8ab3e6a0 EV |
1782 | if (!tz) |
1783 | return -EINVAL; | |
1784 | ||
4cb18728 | 1785 | /* allocate memory */ |
886ee546 JP |
1786 | size = nla_total_size(sizeof(struct thermal_genl_event)) + |
1787 | nla_total_size(0); | |
4cb18728 D |
1788 | |
1789 | skb = genlmsg_new(size, GFP_ATOMIC); | |
1790 | if (!skb) | |
1791 | return -ENOMEM; | |
1792 | ||
1793 | /* add the genetlink message header */ | |
1794 | msg_header = genlmsg_put(skb, 0, thermal_event_seqnum++, | |
1795 | &thermal_event_genl_family, 0, | |
1796 | THERMAL_GENL_CMD_EVENT); | |
1797 | if (!msg_header) { | |
1798 | nlmsg_free(skb); | |
1799 | return -ENOMEM; | |
1800 | } | |
1801 | ||
1802 | /* fill the data */ | |
886ee546 JP |
1803 | attr = nla_reserve(skb, THERMAL_GENL_ATTR_EVENT, |
1804 | sizeof(struct thermal_genl_event)); | |
4cb18728 D |
1805 | |
1806 | if (!attr) { | |
1807 | nlmsg_free(skb); | |
1808 | return -EINVAL; | |
1809 | } | |
1810 | ||
1811 | thermal_event = nla_data(attr); | |
1812 | if (!thermal_event) { | |
1813 | nlmsg_free(skb); | |
1814 | return -EINVAL; | |
1815 | } | |
1816 | ||
1817 | memset(thermal_event, 0, sizeof(struct thermal_genl_event)); | |
1818 | ||
8ab3e6a0 | 1819 | thermal_event->orig = tz->id; |
4cb18728 D |
1820 | thermal_event->event = event; |
1821 | ||
1822 | /* send multicast genetlink message */ | |
1823 | result = genlmsg_end(skb, msg_header); | |
1824 | if (result < 0) { | |
1825 | nlmsg_free(skb); | |
1826 | return result; | |
1827 | } | |
1828 | ||
1829 | result = genlmsg_multicast(skb, 0, thermal_event_mcgrp.id, GFP_ATOMIC); | |
1830 | if (result) | |
923e0b1e | 1831 | dev_err(&tz->device, "Failed to send netlink event:%d", result); |
4cb18728 D |
1832 | |
1833 | return result; | |
1834 | } | |
2d58d7ea | 1835 | EXPORT_SYMBOL(thermal_generate_netlink_event); |
4cb18728 D |
1836 | |
1837 | static int genetlink_init(void) | |
1838 | { | |
1839 | int result; | |
1840 | ||
1841 | result = genl_register_family(&thermal_event_genl_family); | |
1842 | if (result) | |
1843 | return result; | |
1844 | ||
1845 | result = genl_register_mc_group(&thermal_event_genl_family, | |
1846 | &thermal_event_mcgrp); | |
1847 | if (result) | |
1848 | genl_unregister_family(&thermal_event_genl_family); | |
1849 | return result; | |
1850 | } | |
1851 | ||
af06216a RW |
1852 | static void genetlink_exit(void) |
1853 | { | |
1854 | genl_unregister_family(&thermal_event_genl_family); | |
1855 | } | |
1856 | #else /* !CONFIG_NET */ | |
1857 | static inline int genetlink_init(void) { return 0; } | |
1858 | static inline void genetlink_exit(void) {} | |
1859 | #endif /* !CONFIG_NET */ | |
1860 | ||
203d3d4a ZR |
1861 | static int __init thermal_init(void) |
1862 | { | |
1863 | int result = 0; | |
1864 | ||
1865 | result = class_register(&thermal_class); | |
1866 | if (result) { | |
1867 | idr_destroy(&thermal_tz_idr); | |
1868 | idr_destroy(&thermal_cdev_idr); | |
1869 | mutex_destroy(&thermal_idr_lock); | |
1870 | mutex_destroy(&thermal_list_lock); | |
da28d966 | 1871 | return result; |
203d3d4a | 1872 | } |
4cb18728 | 1873 | result = genetlink_init(); |
203d3d4a ZR |
1874 | return result; |
1875 | } | |
1876 | ||
1877 | static void __exit thermal_exit(void) | |
1878 | { | |
1879 | class_unregister(&thermal_class); | |
1880 | idr_destroy(&thermal_tz_idr); | |
1881 | idr_destroy(&thermal_cdev_idr); | |
1882 | mutex_destroy(&thermal_idr_lock); | |
1883 | mutex_destroy(&thermal_list_lock); | |
4cb18728 | 1884 | genetlink_exit(); |
203d3d4a ZR |
1885 | } |
1886 | ||
4cb18728 | 1887 | fs_initcall(thermal_init); |
203d3d4a | 1888 | module_exit(thermal_exit); |