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> |
a116b5d4 | 37 | #include <linux/of.h> |
1cac41cb | 38 | #include <linux/cpu.h> |
4cb18728 D |
39 | #include <net/netlink.h> |
40 | #include <net/genetlink.h> | |
a67208e9 | 41 | #include <linux/suspend.h> |
203d3d4a | 42 | |
100a8fdb PA |
43 | #define CREATE_TRACE_POINTS |
44 | #include <trace/events/thermal.h> | |
45 | ||
71350db4 | 46 | #include "thermal_core.h" |
0dd88793 | 47 | #include "thermal_hwmon.h" |
71350db4 | 48 | |
63c4ec90 | 49 | MODULE_AUTHOR("Zhang Rui"); |
203d3d4a | 50 | MODULE_DESCRIPTION("Generic thermal management sysfs support"); |
6d8d4974 | 51 | MODULE_LICENSE("GPL v2"); |
203d3d4a | 52 | |
203d3d4a ZR |
53 | static DEFINE_IDR(thermal_tz_idr); |
54 | static DEFINE_IDR(thermal_cdev_idr); | |
55 | static DEFINE_MUTEX(thermal_idr_lock); | |
56 | ||
57 | static LIST_HEAD(thermal_tz_list); | |
58 | static LIST_HEAD(thermal_cdev_list); | |
a4a15485 D |
59 | static LIST_HEAD(thermal_governor_list); |
60 | ||
203d3d4a | 61 | static DEFINE_MUTEX(thermal_list_lock); |
a4a15485 D |
62 | static DEFINE_MUTEX(thermal_governor_lock); |
63 | ||
a67208e9 ZR |
64 | static atomic_t in_suspend; |
65 | ||
1cac41cb MB |
66 | #ifdef CONFIG_SCHED_HMP |
67 | #define BOUNDED_CPU 1 | |
68 | static void start_poll_queue(struct thermal_zone_device *tz, int delay) | |
69 | { | |
70 | mod_delayed_work_on(tz->poll_queue_cpu, system_freezable_wq, &tz->poll_queue, | |
71 | msecs_to_jiffies(delay)); | |
72 | } | |
73 | #endif | |
74 | ||
f2234bcd ZR |
75 | static struct thermal_governor *def_governor; |
76 | ||
a4a15485 D |
77 | static struct thermal_governor *__find_governor(const char *name) |
78 | { | |
79 | struct thermal_governor *pos; | |
80 | ||
f2234bcd ZR |
81 | if (!name || !name[0]) |
82 | return def_governor; | |
83 | ||
a4a15485 | 84 | list_for_each_entry(pos, &thermal_governor_list, governor_list) |
484ac2f3 | 85 | if (!strncasecmp(name, pos->name, THERMAL_NAME_LENGTH)) |
a4a15485 D |
86 | return pos; |
87 | ||
88 | return NULL; | |
89 | } | |
90 | ||
e33df1d2 JM |
91 | /** |
92 | * bind_previous_governor() - bind the previous governor of the thermal zone | |
93 | * @tz: a valid pointer to a struct thermal_zone_device | |
94 | * @failed_gov_name: the name of the governor that failed to register | |
95 | * | |
96 | * Register the previous governor of the thermal zone after a new | |
97 | * governor has failed to be bound. | |
98 | */ | |
99 | static void bind_previous_governor(struct thermal_zone_device *tz, | |
100 | const char *failed_gov_name) | |
101 | { | |
102 | if (tz->governor && tz->governor->bind_to_tz) { | |
103 | if (tz->governor->bind_to_tz(tz)) { | |
104 | dev_err(&tz->device, | |
105 | "governor %s failed to bind and the previous one (%s) failed to bind again, thermal zone %s has no governor\n", | |
106 | failed_gov_name, tz->governor->name, tz->type); | |
107 | tz->governor = NULL; | |
108 | } | |
109 | } | |
110 | } | |
111 | ||
112 | /** | |
113 | * thermal_set_governor() - Switch to another governor | |
114 | * @tz: a valid pointer to a struct thermal_zone_device | |
115 | * @new_gov: pointer to the new governor | |
116 | * | |
117 | * Change the governor of thermal zone @tz. | |
118 | * | |
119 | * Return: 0 on success, an error if the new governor's bind_to_tz() failed. | |
120 | */ | |
121 | static int thermal_set_governor(struct thermal_zone_device *tz, | |
122 | struct thermal_governor *new_gov) | |
123 | { | |
124 | int ret = 0; | |
125 | ||
126 | if (tz->governor && tz->governor->unbind_from_tz) | |
127 | tz->governor->unbind_from_tz(tz); | |
128 | ||
129 | if (new_gov && new_gov->bind_to_tz) { | |
130 | ret = new_gov->bind_to_tz(tz); | |
131 | if (ret) { | |
132 | bind_previous_governor(tz, new_gov->name); | |
133 | ||
134 | return ret; | |
135 | } | |
136 | } | |
137 | ||
138 | tz->governor = new_gov; | |
139 | ||
140 | return ret; | |
141 | } | |
142 | ||
a4a15485 D |
143 | int thermal_register_governor(struct thermal_governor *governor) |
144 | { | |
145 | int err; | |
146 | const char *name; | |
147 | struct thermal_zone_device *pos; | |
148 | ||
149 | if (!governor) | |
150 | return -EINVAL; | |
151 | ||
152 | mutex_lock(&thermal_governor_lock); | |
153 | ||
154 | err = -EBUSY; | |
155 | if (__find_governor(governor->name) == NULL) { | |
156 | err = 0; | |
157 | list_add(&governor->governor_list, &thermal_governor_list); | |
f2234bcd ZR |
158 | if (!def_governor && !strncmp(governor->name, |
159 | DEFAULT_THERMAL_GOVERNOR, THERMAL_NAME_LENGTH)) | |
160 | def_governor = governor; | |
a4a15485 D |
161 | } |
162 | ||
163 | mutex_lock(&thermal_list_lock); | |
164 | ||
165 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
f2234bcd ZR |
166 | /* |
167 | * only thermal zones with specified tz->tzp->governor_name | |
168 | * may run with tz->govenor unset | |
169 | */ | |
a4a15485 D |
170 | if (pos->governor) |
171 | continue; | |
f2234bcd ZR |
172 | |
173 | name = pos->tzp->governor_name; | |
174 | ||
e33df1d2 JM |
175 | if (!strncasecmp(name, governor->name, THERMAL_NAME_LENGTH)) { |
176 | int ret; | |
177 | ||
178 | ret = thermal_set_governor(pos, governor); | |
179 | if (ret) | |
180 | dev_err(&pos->device, | |
181 | "Failed to set governor %s for thermal zone %s: %d\n", | |
182 | governor->name, pos->type, ret); | |
183 | } | |
a4a15485 D |
184 | } |
185 | ||
186 | mutex_unlock(&thermal_list_lock); | |
187 | mutex_unlock(&thermal_governor_lock); | |
188 | ||
189 | return err; | |
190 | } | |
a4a15485 D |
191 | |
192 | void thermal_unregister_governor(struct thermal_governor *governor) | |
193 | { | |
194 | struct thermal_zone_device *pos; | |
195 | ||
196 | if (!governor) | |
197 | return; | |
198 | ||
199 | mutex_lock(&thermal_governor_lock); | |
200 | ||
201 | if (__find_governor(governor->name) == NULL) | |
202 | goto exit; | |
203 | ||
204 | mutex_lock(&thermal_list_lock); | |
205 | ||
206 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
484ac2f3 | 207 | if (!strncasecmp(pos->governor->name, governor->name, |
a4a15485 | 208 | THERMAL_NAME_LENGTH)) |
e33df1d2 | 209 | thermal_set_governor(pos, NULL); |
a4a15485 D |
210 | } |
211 | ||
212 | mutex_unlock(&thermal_list_lock); | |
213 | list_del(&governor->governor_list); | |
214 | exit: | |
215 | mutex_unlock(&thermal_governor_lock); | |
216 | return; | |
217 | } | |
203d3d4a ZR |
218 | |
219 | static int get_idr(struct idr *idr, struct mutex *lock, int *id) | |
220 | { | |
6deb69fa | 221 | int ret; |
203d3d4a ZR |
222 | |
223 | if (lock) | |
224 | mutex_lock(lock); | |
6deb69fa | 225 | ret = idr_alloc(idr, NULL, 0, 0, GFP_KERNEL); |
203d3d4a ZR |
226 | if (lock) |
227 | mutex_unlock(lock); | |
6deb69fa TH |
228 | if (unlikely(ret < 0)) |
229 | return ret; | |
230 | *id = ret; | |
203d3d4a ZR |
231 | return 0; |
232 | } | |
233 | ||
234 | static void release_idr(struct idr *idr, struct mutex *lock, int id) | |
235 | { | |
236 | if (lock) | |
237 | mutex_lock(lock); | |
238 | idr_remove(idr, id); | |
239 | if (lock) | |
240 | mutex_unlock(lock); | |
241 | } | |
242 | ||
9b4298a0 D |
243 | int get_tz_trend(struct thermal_zone_device *tz, int trip) |
244 | { | |
245 | enum thermal_trend trend; | |
246 | ||
0c872507 EV |
247 | if (tz->emul_temperature || !tz->ops->get_trend || |
248 | tz->ops->get_trend(tz, trip, &trend)) { | |
9b4298a0 D |
249 | if (tz->temperature > tz->last_temperature) |
250 | trend = THERMAL_TREND_RAISING; | |
251 | else if (tz->temperature < tz->last_temperature) | |
252 | trend = THERMAL_TREND_DROPPING; | |
253 | else | |
254 | trend = THERMAL_TREND_STABLE; | |
255 | } | |
256 | ||
257 | return trend; | |
258 | } | |
259 | EXPORT_SYMBOL(get_tz_trend); | |
260 | ||
261 | struct thermal_instance *get_thermal_instance(struct thermal_zone_device *tz, | |
262 | struct thermal_cooling_device *cdev, int trip) | |
263 | { | |
264 | struct thermal_instance *pos = NULL; | |
265 | struct thermal_instance *target_instance = NULL; | |
266 | ||
267 | mutex_lock(&tz->lock); | |
268 | mutex_lock(&cdev->lock); | |
269 | ||
270 | list_for_each_entry(pos, &tz->thermal_instances, tz_node) { | |
271 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { | |
272 | target_instance = pos; | |
273 | break; | |
274 | } | |
275 | } | |
276 | ||
277 | mutex_unlock(&cdev->lock); | |
278 | mutex_unlock(&tz->lock); | |
279 | ||
280 | return target_instance; | |
281 | } | |
282 | EXPORT_SYMBOL(get_thermal_instance); | |
283 | ||
7e8ee1e9 D |
284 | static void print_bind_err_msg(struct thermal_zone_device *tz, |
285 | struct thermal_cooling_device *cdev, int ret) | |
286 | { | |
287 | dev_err(&tz->device, "binding zone %s with cdev %s failed:%d\n", | |
288 | tz->type, cdev->type, ret); | |
289 | } | |
290 | ||
291 | static void __bind(struct thermal_zone_device *tz, int mask, | |
a8892d83 | 292 | struct thermal_cooling_device *cdev, |
6cd9e9f6 KS |
293 | unsigned long *limits, |
294 | unsigned int weight) | |
7e8ee1e9 D |
295 | { |
296 | int i, ret; | |
297 | ||
298 | for (i = 0; i < tz->trips; i++) { | |
299 | if (mask & (1 << i)) { | |
a8892d83 EV |
300 | unsigned long upper, lower; |
301 | ||
302 | upper = THERMAL_NO_LIMIT; | |
303 | lower = THERMAL_NO_LIMIT; | |
304 | if (limits) { | |
305 | lower = limits[i * 2]; | |
306 | upper = limits[i * 2 + 1]; | |
307 | } | |
7e8ee1e9 | 308 | ret = thermal_zone_bind_cooling_device(tz, i, cdev, |
6cd9e9f6 KS |
309 | upper, lower, |
310 | weight); | |
7e8ee1e9 D |
311 | if (ret) |
312 | print_bind_err_msg(tz, cdev, ret); | |
313 | } | |
314 | } | |
315 | } | |
316 | ||
317 | static void __unbind(struct thermal_zone_device *tz, int mask, | |
318 | struct thermal_cooling_device *cdev) | |
319 | { | |
320 | int i; | |
321 | ||
322 | for (i = 0; i < tz->trips; i++) | |
323 | if (mask & (1 << i)) | |
324 | thermal_zone_unbind_cooling_device(tz, i, cdev); | |
325 | } | |
326 | ||
327 | static void bind_cdev(struct thermal_cooling_device *cdev) | |
328 | { | |
329 | int i, ret; | |
330 | const struct thermal_zone_params *tzp; | |
331 | struct thermal_zone_device *pos = NULL; | |
332 | ||
333 | mutex_lock(&thermal_list_lock); | |
334 | ||
335 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
336 | if (!pos->tzp && !pos->ops->bind) | |
337 | continue; | |
338 | ||
a9f2d19b | 339 | if (pos->ops->bind) { |
7e8ee1e9 D |
340 | ret = pos->ops->bind(pos, cdev); |
341 | if (ret) | |
342 | print_bind_err_msg(pos, cdev, ret); | |
a9f2d19b | 343 | continue; |
7e8ee1e9 D |
344 | } |
345 | ||
346 | tzp = pos->tzp; | |
791700cd HD |
347 | if (!tzp || !tzp->tbp) |
348 | continue; | |
7e8ee1e9 D |
349 | |
350 | for (i = 0; i < tzp->num_tbps; i++) { | |
351 | if (tzp->tbp[i].cdev || !tzp->tbp[i].match) | |
352 | continue; | |
353 | if (tzp->tbp[i].match(pos, cdev)) | |
354 | continue; | |
355 | tzp->tbp[i].cdev = cdev; | |
a8892d83 | 356 | __bind(pos, tzp->tbp[i].trip_mask, cdev, |
6cd9e9f6 KS |
357 | tzp->tbp[i].binding_limits, |
358 | tzp->tbp[i].weight); | |
7e8ee1e9 D |
359 | } |
360 | } | |
361 | ||
362 | mutex_unlock(&thermal_list_lock); | |
363 | } | |
364 | ||
365 | static void bind_tz(struct thermal_zone_device *tz) | |
366 | { | |
367 | int i, ret; | |
368 | struct thermal_cooling_device *pos = NULL; | |
369 | const struct thermal_zone_params *tzp = tz->tzp; | |
370 | ||
371 | if (!tzp && !tz->ops->bind) | |
372 | return; | |
373 | ||
374 | mutex_lock(&thermal_list_lock); | |
375 | ||
a9f2d19b NW |
376 | /* If there is ops->bind, try to use ops->bind */ |
377 | if (tz->ops->bind) { | |
7e8ee1e9 D |
378 | list_for_each_entry(pos, &thermal_cdev_list, node) { |
379 | ret = tz->ops->bind(tz, pos); | |
380 | if (ret) | |
381 | print_bind_err_msg(tz, pos, ret); | |
382 | } | |
383 | goto exit; | |
384 | } | |
385 | ||
791700cd | 386 | if (!tzp || !tzp->tbp) |
7e8ee1e9 D |
387 | goto exit; |
388 | ||
389 | list_for_each_entry(pos, &thermal_cdev_list, node) { | |
390 | for (i = 0; i < tzp->num_tbps; i++) { | |
391 | if (tzp->tbp[i].cdev || !tzp->tbp[i].match) | |
392 | continue; | |
393 | if (tzp->tbp[i].match(tz, pos)) | |
394 | continue; | |
395 | tzp->tbp[i].cdev = pos; | |
a8892d83 | 396 | __bind(tz, tzp->tbp[i].trip_mask, pos, |
6cd9e9f6 KS |
397 | tzp->tbp[i].binding_limits, |
398 | tzp->tbp[i].weight); | |
7e8ee1e9 D |
399 | } |
400 | } | |
401 | exit: | |
402 | mutex_unlock(&thermal_list_lock); | |
403 | } | |
404 | ||
0c01ebbf D |
405 | static void thermal_zone_device_set_polling(struct thermal_zone_device *tz, |
406 | int delay) | |
407 | { | |
408 | if (delay > 1000) | |
1cac41cb MB |
409 | #ifdef CONFIG_SCHED_HMP |
410 | start_poll_queue(tz, delay); | |
411 | #else | |
0c01ebbf D |
412 | mod_delayed_work(system_freezable_wq, &tz->poll_queue, |
413 | round_jiffies(msecs_to_jiffies(delay))); | |
1cac41cb | 414 | #endif |
0c01ebbf | 415 | else if (delay) |
1cac41cb MB |
416 | #ifdef CONFIG_SCHED_HMP |
417 | start_poll_queue(tz, delay); | |
418 | #else | |
0c01ebbf D |
419 | mod_delayed_work(system_freezable_wq, &tz->poll_queue, |
420 | msecs_to_jiffies(delay)); | |
1cac41cb | 421 | #endif |
0c01ebbf D |
422 | else |
423 | cancel_delayed_work(&tz->poll_queue); | |
424 | } | |
425 | ||
426 | static void monitor_thermal_zone(struct thermal_zone_device *tz) | |
427 | { | |
428 | mutex_lock(&tz->lock); | |
429 | ||
430 | if (tz->passive) | |
431 | thermal_zone_device_set_polling(tz, tz->passive_delay); | |
432 | else if (tz->polling_delay) | |
433 | thermal_zone_device_set_polling(tz, tz->polling_delay); | |
434 | else | |
435 | thermal_zone_device_set_polling(tz, 0); | |
436 | ||
437 | mutex_unlock(&tz->lock); | |
438 | } | |
439 | ||
440 | static void handle_non_critical_trips(struct thermal_zone_device *tz, | |
441 | int trip, enum thermal_trip_type trip_type) | |
442 | { | |
f2234bcd ZR |
443 | tz->governor ? tz->governor->throttle(tz, trip) : |
444 | def_governor->throttle(tz, trip); | |
0c01ebbf D |
445 | } |
446 | ||
447 | static void handle_critical_trips(struct thermal_zone_device *tz, | |
448 | int trip, enum thermal_trip_type trip_type) | |
449 | { | |
17e8351a | 450 | int trip_temp; |
0c01ebbf D |
451 | |
452 | tz->ops->get_trip_temp(tz, trip, &trip_temp); | |
453 | ||
454 | /* If we have not crossed the trip_temp, we do not care. */ | |
84ffe3ec | 455 | if (trip_temp <= 0 || tz->temperature < trip_temp) |
0c01ebbf D |
456 | return; |
457 | ||
208cd822 PA |
458 | trace_thermal_zone_trip(tz, trip, trip_type); |
459 | ||
0c01ebbf D |
460 | if (tz->ops->notify) |
461 | tz->ops->notify(tz, trip, trip_type); | |
462 | ||
463 | if (trip_type == THERMAL_TRIP_CRITICAL) { | |
923e0b1e EV |
464 | dev_emerg(&tz->device, |
465 | "critical temperature reached(%d C),shutting down\n", | |
466 | tz->temperature / 1000); | |
0c01ebbf D |
467 | orderly_poweroff(true); |
468 | } | |
469 | } | |
470 | ||
1cac41cb MB |
471 | #ifdef CONFIG_SEC_DEBUG_HW_PARAM |
472 | #define APO_THROTTLE_TEMP 81000 | |
473 | static bool period_check; | |
474 | static bool is_apo_check; | |
475 | static int trip_temp; | |
476 | static u64 last_time[THERMAL_ZONE_MAX], curr_time[THERMAL_ZONE_MAX]; | |
477 | static u64 last_apo, curr_apo; | |
478 | static enum thermal_trip_type result_type; | |
479 | struct thermal_data_devices thermal_data_info[THERMAL_ZONE_MAX]; | |
480 | #endif | |
481 | ||
0c01ebbf D |
482 | static void handle_thermal_trip(struct thermal_zone_device *tz, int trip) |
483 | { | |
484 | enum thermal_trip_type type; | |
1cac41cb MB |
485 | #ifdef CONFIG_SEC_DEBUG_HW_PARAM |
486 | int tid = tz->id; | |
487 | #endif | |
0c01ebbf | 488 | |
d75936f3 ZR |
489 | /* Ignore disabled trip points */ |
490 | if (test_bit(trip, &tz->trips_disabled)) | |
491 | return; | |
492 | ||
1cac41cb MB |
493 | #ifdef CONFIG_SEC_DEBUG_HW_PARAM |
494 | if (trip == 0) { | |
495 | period_check = false; | |
496 | result_type = THERMAL_TRIP_ACTIVE; | |
497 | } | |
498 | ||
499 | if (tz->temperature > thermal_data_info[tid].max_temp) | |
500 | thermal_data_info[tid].max_temp = tz->temperature; | |
501 | ||
502 | tz->ops->get_trip_temp(tz, trip, &trip_temp); | |
503 | if (tz->temperature > trip_temp) { | |
504 | tz->ops->get_trip_type(tz, trip + 1, &result_type); | |
505 | } | |
506 | else { | |
507 | if (!period_check) { | |
508 | curr_time[tid] = ktime_to_ns(ktime_get()) / 1000000; | |
509 | if(last_time[tid]) { | |
510 | if(result_type == THERMAL_TRIP_ACTIVE) | |
511 | thermal_data_info[tid].times[ACTIVE_TIMES] += | |
512 | (curr_time[tid] - last_time[tid]); | |
513 | else if (result_type == THERMAL_TRIP_PASSIVE) | |
514 | thermal_data_info[tid].times[PASSIVE_TIMES] += | |
515 | (curr_time[tid] - last_time[tid]); | |
516 | else if (result_type == THERMAL_TRIP_HOT) | |
517 | thermal_data_info[tid].times[HOT_TIMES] += | |
518 | (curr_time[tid] - last_time[tid]); | |
519 | ||
520 | period_check = true; | |
521 | } | |
522 | ||
523 | if (tid == THERMAL_ZONE_APOLLO) { | |
524 | if (tz->temperature >= APO_THROTTLE_TEMP) { | |
525 | if (!is_apo_check) { | |
526 | is_apo_check = true; | |
527 | last_apo = ktime_to_ns(ktime_get()) / 1000000; | |
528 | } | |
529 | } | |
530 | else { | |
531 | if (is_apo_check) { | |
532 | curr_apo = ktime_to_ns(ktime_get()) / 1000000; | |
533 | thermal_data_info[tid].hotplug_out += | |
534 | (curr_apo - last_apo); | |
535 | is_apo_check = false; | |
536 | } | |
537 | } | |
538 | } | |
539 | ||
540 | last_time[tid] = curr_time[tid]; | |
541 | } | |
542 | } | |
543 | #endif | |
544 | ||
0c01ebbf D |
545 | tz->ops->get_trip_type(tz, trip, &type); |
546 | ||
547 | if (type == THERMAL_TRIP_CRITICAL || type == THERMAL_TRIP_HOT) | |
548 | handle_critical_trips(tz, trip, type); | |
549 | else | |
550 | handle_non_critical_trips(tz, trip, type); | |
551 | /* | |
552 | * Alright, we handled this trip successfully. | |
553 | * So, start monitoring again. | |
554 | */ | |
555 | monitor_thermal_zone(tz); | |
556 | } | |
557 | ||
837b26bb | 558 | /** |
f6be0584 | 559 | * thermal_zone_get_temp() - returns the temperature of a thermal zone |
837b26bb EV |
560 | * @tz: a valid pointer to a struct thermal_zone_device |
561 | * @temp: a valid pointer to where to store the resulting temperature. | |
562 | * | |
563 | * When a valid thermal zone reference is passed, it will fetch its | |
564 | * temperature and fill @temp. | |
565 | * | |
566 | * Return: On success returns 0, an error code otherwise | |
567 | */ | |
17e8351a | 568 | int thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp) |
e6e238c3 | 569 | { |
837b26bb | 570 | int ret = -EINVAL; |
5e20b2e5 | 571 | int count; |
17e8351a | 572 | int crit_temp = INT_MAX; |
e6e238c3 ADK |
573 | enum thermal_trip_type type; |
574 | ||
81bd4e1c | 575 | if (!tz || IS_ERR(tz) || !tz->ops->get_temp) |
837b26bb EV |
576 | goto exit; |
577 | ||
e6e238c3 ADK |
578 | mutex_lock(&tz->lock); |
579 | ||
580 | ret = tz->ops->get_temp(tz, temp); | |
e6e238c3 | 581 | |
79e5421c SH |
582 | if (IS_ENABLED(CONFIG_THERMAL_EMULATION) && tz->emul_temperature) { |
583 | for (count = 0; count < tz->trips; count++) { | |
584 | ret = tz->ops->get_trip_type(tz, count, &type); | |
585 | if (!ret && type == THERMAL_TRIP_CRITICAL) { | |
586 | ret = tz->ops->get_trip_temp(tz, count, | |
587 | &crit_temp); | |
588 | break; | |
589 | } | |
590 | } | |
e6e238c3 | 591 | |
934c93b8 SH |
592 | /* |
593 | * Only allow emulating a temperature when the real temperature | |
594 | * is below the critical temperature so that the emulation code | |
595 | * cannot hide critical conditions. | |
596 | */ | |
79e5421c SH |
597 | if (!ret && *temp < crit_temp) |
598 | *temp = tz->emul_temperature; | |
599 | } | |
600 | ||
e6e238c3 | 601 | mutex_unlock(&tz->lock); |
837b26bb | 602 | exit: |
e6e238c3 ADK |
603 | return ret; |
604 | } | |
837b26bb | 605 | EXPORT_SYMBOL_GPL(thermal_zone_get_temp); |
e6e238c3 | 606 | |
1cac41cb MB |
607 | #ifdef CONFIG_SEC_PM_DEBUG |
608 | #define TEMP_COUNT 10 | |
609 | #endif | |
610 | ||
0c01ebbf D |
611 | static void update_temperature(struct thermal_zone_device *tz) |
612 | { | |
17e8351a | 613 | int temp, ret; |
1cac41cb MB |
614 | #ifdef CONFIG_SEC_PM_DEBUG |
615 | static int count = 1; | |
616 | #endif | |
0c01ebbf | 617 | |
e6e238c3 | 618 | ret = thermal_zone_get_temp(tz, &temp); |
0c01ebbf | 619 | if (ret) { |
7e497a73 HG |
620 | if (ret != -EAGAIN) |
621 | dev_warn(&tz->device, | |
622 | "failed to read out thermal zone (%d)\n", | |
623 | ret); | |
e6e238c3 | 624 | return; |
0c01ebbf D |
625 | } |
626 | ||
e6e238c3 | 627 | mutex_lock(&tz->lock); |
0c01ebbf D |
628 | tz->last_temperature = tz->temperature; |
629 | tz->temperature = temp; | |
0c01ebbf | 630 | mutex_unlock(&tz->lock); |
06475b55 | 631 | |
100a8fdb | 632 | trace_thermal_temperature(tz); |
774ac8b7 ZR |
633 | if (tz->last_temperature == THERMAL_TEMP_INVALID) |
634 | dev_dbg(&tz->device, "last_temperature N/A, current_temperature=%d\n", | |
635 | tz->temperature); | |
636 | else | |
637 | dev_dbg(&tz->device, "last_temperature=%d, current_temperature=%d\n", | |
638 | tz->last_temperature, tz->temperature); | |
1cac41cb MB |
639 | |
640 | #ifdef CONFIG_SEC_PM_DEBUG | |
641 | if (!(count++ % TEMP_COUNT)) { | |
642 | count = 1; | |
643 | dev_info(&tz->device, "[TMU] last_temperature=%d, current_temperature=%d\n", | |
644 | tz->last_temperature, tz->temperature); | |
645 | } | |
646 | #endif | |
774ac8b7 ZR |
647 | } |
648 | ||
649 | static void thermal_zone_device_reset(struct thermal_zone_device *tz) | |
650 | { | |
651 | struct thermal_instance *pos; | |
652 | ||
653 | tz->temperature = THERMAL_TEMP_INVALID; | |
654 | tz->passive = 0; | |
655 | list_for_each_entry(pos, &tz->thermal_instances, tz_node) | |
656 | pos->initialized = false; | |
0c01ebbf D |
657 | } |
658 | ||
659 | void thermal_zone_device_update(struct thermal_zone_device *tz) | |
660 | { | |
661 | int count; | |
1cac41cb | 662 | enum thermal_device_mode mode; |
0c01ebbf | 663 | |
a67208e9 ZR |
664 | if (atomic_read(&in_suspend)) |
665 | return; | |
666 | ||
1cac41cb | 667 | if (!tz->ops->get_temp || !tz->ops->get_mode) |
81bd4e1c EV |
668 | return; |
669 | ||
1cac41cb | 670 | tz->ops->get_mode(tz, &mode); |
0c01ebbf | 671 | |
1cac41cb MB |
672 | if (mode == THERMAL_DEVICE_ENABLED) { |
673 | update_temperature(tz); | |
674 | ||
675 | for (count = 0; count < tz->trips; count++) | |
676 | handle_thermal_trip(tz, count); | |
677 | ||
678 | if (tz->ops->throttle_hotplug) | |
679 | tz->ops->throttle_hotplug(tz); | |
680 | } | |
0c01ebbf | 681 | } |
910cb1e3 | 682 | EXPORT_SYMBOL_GPL(thermal_zone_device_update); |
0c01ebbf D |
683 | |
684 | static void thermal_zone_device_check(struct work_struct *work) | |
685 | { | |
686 | struct thermal_zone_device *tz = container_of(work, struct | |
687 | thermal_zone_device, | |
688 | poll_queue.work); | |
689 | thermal_zone_device_update(tz); | |
690 | } | |
691 | ||
203d3d4a ZR |
692 | /* sys I/F for thermal zone */ |
693 | ||
694 | #define to_thermal_zone(_dev) \ | |
695 | container_of(_dev, struct thermal_zone_device, device) | |
696 | ||
697 | static ssize_t | |
698 | type_show(struct device *dev, struct device_attribute *attr, char *buf) | |
699 | { | |
700 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
701 | ||
702 | return sprintf(buf, "%s\n", tz->type); | |
703 | } | |
704 | ||
705 | static ssize_t | |
706 | temp_show(struct device *dev, struct device_attribute *attr, char *buf) | |
707 | { | |
708 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
17e8351a | 709 | int temperature, ret; |
203d3d4a | 710 | |
e6e238c3 | 711 | ret = thermal_zone_get_temp(tz, &temperature); |
6503e5df MG |
712 | |
713 | if (ret) | |
714 | return ret; | |
715 | ||
17e8351a | 716 | return sprintf(buf, "%d\n", temperature); |
203d3d4a ZR |
717 | } |
718 | ||
719 | static ssize_t | |
720 | mode_show(struct device *dev, struct device_attribute *attr, char *buf) | |
721 | { | |
722 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
723 | enum thermal_device_mode mode; |
724 | int result; | |
203d3d4a ZR |
725 | |
726 | if (!tz->ops->get_mode) | |
727 | return -EPERM; | |
728 | ||
6503e5df MG |
729 | result = tz->ops->get_mode(tz, &mode); |
730 | if (result) | |
731 | return result; | |
732 | ||
733 | return sprintf(buf, "%s\n", mode == THERMAL_DEVICE_ENABLED ? "enabled" | |
734 | : "disabled"); | |
203d3d4a ZR |
735 | } |
736 | ||
737 | static ssize_t | |
738 | mode_store(struct device *dev, struct device_attribute *attr, | |
739 | const char *buf, size_t count) | |
740 | { | |
741 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
742 | int result; | |
743 | ||
744 | if (!tz->ops->set_mode) | |
745 | return -EPERM; | |
746 | ||
f1f0e2ac | 747 | if (!strncmp(buf, "enabled", sizeof("enabled") - 1)) |
6503e5df | 748 | result = tz->ops->set_mode(tz, THERMAL_DEVICE_ENABLED); |
f1f0e2ac | 749 | else if (!strncmp(buf, "disabled", sizeof("disabled") - 1)) |
6503e5df MG |
750 | result = tz->ops->set_mode(tz, THERMAL_DEVICE_DISABLED); |
751 | else | |
752 | result = -EINVAL; | |
753 | ||
203d3d4a ZR |
754 | if (result) |
755 | return result; | |
756 | ||
757 | return count; | |
758 | } | |
759 | ||
760 | static ssize_t | |
761 | trip_point_type_show(struct device *dev, struct device_attribute *attr, | |
762 | char *buf) | |
763 | { | |
764 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
765 | enum thermal_trip_type type; |
766 | int trip, result; | |
203d3d4a ZR |
767 | |
768 | if (!tz->ops->get_trip_type) | |
769 | return -EPERM; | |
770 | ||
771 | if (!sscanf(attr->attr.name, "trip_point_%d_type", &trip)) | |
772 | return -EINVAL; | |
773 | ||
6503e5df MG |
774 | result = tz->ops->get_trip_type(tz, trip, &type); |
775 | if (result) | |
776 | return result; | |
777 | ||
778 | switch (type) { | |
779 | case THERMAL_TRIP_CRITICAL: | |
625120a4 | 780 | return sprintf(buf, "critical\n"); |
6503e5df | 781 | case THERMAL_TRIP_HOT: |
625120a4 | 782 | return sprintf(buf, "hot\n"); |
6503e5df | 783 | case THERMAL_TRIP_PASSIVE: |
625120a4 | 784 | return sprintf(buf, "passive\n"); |
6503e5df | 785 | case THERMAL_TRIP_ACTIVE: |
625120a4 | 786 | return sprintf(buf, "active\n"); |
6503e5df | 787 | default: |
625120a4 | 788 | return sprintf(buf, "unknown\n"); |
6503e5df | 789 | } |
203d3d4a ZR |
790 | } |
791 | ||
c56f5c03 D |
792 | static ssize_t |
793 | trip_point_temp_store(struct device *dev, struct device_attribute *attr, | |
794 | const char *buf, size_t count) | |
795 | { | |
796 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
797 | int trip, ret; | |
798 | unsigned long temperature; | |
799 | ||
800 | if (!tz->ops->set_trip_temp) | |
801 | return -EPERM; | |
802 | ||
803 | if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip)) | |
804 | return -EINVAL; | |
805 | ||
806 | if (kstrtoul(buf, 10, &temperature)) | |
807 | return -EINVAL; | |
808 | ||
809 | ret = tz->ops->set_trip_temp(tz, trip, temperature); | |
810 | ||
811 | return ret ? ret : count; | |
812 | } | |
813 | ||
203d3d4a ZR |
814 | static ssize_t |
815 | trip_point_temp_show(struct device *dev, struct device_attribute *attr, | |
816 | char *buf) | |
817 | { | |
818 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df | 819 | int trip, ret; |
17e8351a | 820 | int temperature; |
203d3d4a ZR |
821 | |
822 | if (!tz->ops->get_trip_temp) | |
823 | return -EPERM; | |
824 | ||
825 | if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip)) | |
826 | return -EINVAL; | |
827 | ||
6503e5df MG |
828 | ret = tz->ops->get_trip_temp(tz, trip, &temperature); |
829 | ||
830 | if (ret) | |
831 | return ret; | |
832 | ||
17e8351a | 833 | return sprintf(buf, "%d\n", temperature); |
203d3d4a ZR |
834 | } |
835 | ||
27365a6c D |
836 | static ssize_t |
837 | trip_point_hyst_store(struct device *dev, struct device_attribute *attr, | |
838 | const char *buf, size_t count) | |
839 | { | |
840 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
841 | int trip, ret; | |
17e8351a | 842 | int temperature; |
27365a6c D |
843 | |
844 | if (!tz->ops->set_trip_hyst) | |
845 | return -EPERM; | |
846 | ||
847 | if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip)) | |
848 | return -EINVAL; | |
849 | ||
17e8351a | 850 | if (kstrtoint(buf, 10, &temperature)) |
27365a6c D |
851 | return -EINVAL; |
852 | ||
853 | /* | |
854 | * We are not doing any check on the 'temperature' value | |
855 | * here. The driver implementing 'set_trip_hyst' has to | |
856 | * take care of this. | |
857 | */ | |
858 | ret = tz->ops->set_trip_hyst(tz, trip, temperature); | |
859 | ||
860 | return ret ? ret : count; | |
861 | } | |
862 | ||
863 | static ssize_t | |
864 | trip_point_hyst_show(struct device *dev, struct device_attribute *attr, | |
865 | char *buf) | |
866 | { | |
867 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
868 | int trip, ret; | |
17e8351a | 869 | int temperature; |
27365a6c D |
870 | |
871 | if (!tz->ops->get_trip_hyst) | |
872 | return -EPERM; | |
873 | ||
874 | if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip)) | |
875 | return -EINVAL; | |
876 | ||
877 | ret = tz->ops->get_trip_hyst(tz, trip, &temperature); | |
878 | ||
17e8351a | 879 | return ret ? ret : sprintf(buf, "%d\n", temperature); |
27365a6c D |
880 | } |
881 | ||
03a971a2 MG |
882 | static ssize_t |
883 | passive_store(struct device *dev, struct device_attribute *attr, | |
884 | const char *buf, size_t count) | |
885 | { | |
886 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
887 | struct thermal_cooling_device *cdev = NULL; | |
888 | int state; | |
889 | ||
890 | if (!sscanf(buf, "%d\n", &state)) | |
891 | return -EINVAL; | |
892 | ||
3d8e3ad8 FP |
893 | /* sanity check: values below 1000 millicelcius don't make sense |
894 | * and can cause the system to go into a thermal heart attack | |
895 | */ | |
896 | if (state && state < 1000) | |
897 | return -EINVAL; | |
898 | ||
03a971a2 MG |
899 | if (state && !tz->forced_passive) { |
900 | mutex_lock(&thermal_list_lock); | |
901 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
902 | if (!strncmp("Processor", cdev->type, | |
903 | sizeof("Processor"))) | |
904 | thermal_zone_bind_cooling_device(tz, | |
9d99842f ZR |
905 | THERMAL_TRIPS_NONE, cdev, |
906 | THERMAL_NO_LIMIT, | |
6cd9e9f6 KS |
907 | THERMAL_NO_LIMIT, |
908 | THERMAL_WEIGHT_DEFAULT); | |
03a971a2 MG |
909 | } |
910 | mutex_unlock(&thermal_list_lock); | |
e4143b03 FP |
911 | if (!tz->passive_delay) |
912 | tz->passive_delay = 1000; | |
03a971a2 MG |
913 | } else if (!state && tz->forced_passive) { |
914 | mutex_lock(&thermal_list_lock); | |
915 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
916 | if (!strncmp("Processor", cdev->type, | |
917 | sizeof("Processor"))) | |
918 | thermal_zone_unbind_cooling_device(tz, | |
919 | THERMAL_TRIPS_NONE, | |
920 | cdev); | |
921 | } | |
922 | mutex_unlock(&thermal_list_lock); | |
e4143b03 | 923 | tz->passive_delay = 0; |
03a971a2 MG |
924 | } |
925 | ||
03a971a2 MG |
926 | tz->forced_passive = state; |
927 | ||
928 | thermal_zone_device_update(tz); | |
929 | ||
930 | return count; | |
931 | } | |
932 | ||
933 | static ssize_t | |
934 | passive_show(struct device *dev, struct device_attribute *attr, | |
935 | char *buf) | |
936 | { | |
937 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
938 | ||
939 | return sprintf(buf, "%d\n", tz->forced_passive); | |
940 | } | |
941 | ||
5a2c090b D |
942 | static ssize_t |
943 | policy_store(struct device *dev, struct device_attribute *attr, | |
944 | const char *buf, size_t count) | |
945 | { | |
946 | int ret = -EINVAL; | |
947 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
948 | struct thermal_governor *gov; | |
42a5bf50 AS |
949 | char name[THERMAL_NAME_LENGTH]; |
950 | ||
951 | snprintf(name, sizeof(name), "%s", buf); | |
5a2c090b D |
952 | |
953 | mutex_lock(&thermal_governor_lock); | |
b6cc772f | 954 | mutex_lock(&tz->lock); |
5a2c090b | 955 | |
42a5bf50 | 956 | gov = __find_governor(strim(name)); |
5a2c090b D |
957 | if (!gov) |
958 | goto exit; | |
959 | ||
e33df1d2 JM |
960 | ret = thermal_set_governor(tz, gov); |
961 | if (!ret) | |
962 | ret = count; | |
5a2c090b D |
963 | |
964 | exit: | |
b6cc772f | 965 | mutex_unlock(&tz->lock); |
5a2c090b D |
966 | mutex_unlock(&thermal_governor_lock); |
967 | return ret; | |
968 | } | |
969 | ||
970 | static ssize_t | |
971 | policy_show(struct device *dev, struct device_attribute *devattr, char *buf) | |
972 | { | |
973 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
974 | ||
975 | return sprintf(buf, "%s\n", tz->governor->name); | |
976 | } | |
977 | ||
25a0a5ce NW |
978 | static ssize_t |
979 | available_policies_show(struct device *dev, struct device_attribute *devattr, | |
980 | char *buf) | |
981 | { | |
982 | struct thermal_governor *pos; | |
983 | ssize_t count = 0; | |
984 | ssize_t size = PAGE_SIZE; | |
985 | ||
986 | mutex_lock(&thermal_governor_lock); | |
987 | ||
988 | list_for_each_entry(pos, &thermal_governor_list, governor_list) { | |
989 | size = PAGE_SIZE - count; | |
990 | count += scnprintf(buf + count, size, "%s ", pos->name); | |
991 | } | |
992 | count += scnprintf(buf + count, size, "\n"); | |
993 | ||
994 | mutex_unlock(&thermal_governor_lock); | |
995 | ||
996 | return count; | |
997 | } | |
998 | ||
e6e238c3 ADK |
999 | static ssize_t |
1000 | emul_temp_store(struct device *dev, struct device_attribute *attr, | |
1001 | const char *buf, size_t count) | |
1002 | { | |
1003 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
1004 | int ret = 0; | |
1005 | unsigned long temperature; | |
1006 | ||
1007 | if (kstrtoul(buf, 10, &temperature)) | |
1008 | return -EINVAL; | |
1009 | ||
1010 | if (!tz->ops->set_emul_temp) { | |
1011 | mutex_lock(&tz->lock); | |
1012 | tz->emul_temperature = temperature; | |
1013 | mutex_unlock(&tz->lock); | |
1014 | } else { | |
1015 | ret = tz->ops->set_emul_temp(tz, temperature); | |
1016 | } | |
1017 | ||
800744bf T |
1018 | if (!ret) |
1019 | thermal_zone_device_update(tz); | |
1020 | ||
e6e238c3 ADK |
1021 | return ret ? ret : count; |
1022 | } | |
1023 | static DEVICE_ATTR(emul_temp, S_IWUSR, NULL, emul_temp_store); | |
e6e238c3 | 1024 | |
9f38271c JM |
1025 | static ssize_t |
1026 | sustainable_power_show(struct device *dev, struct device_attribute *devattr, | |
1027 | char *buf) | |
1028 | { | |
1029 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
1030 | ||
1031 | if (tz->tzp) | |
1032 | return sprintf(buf, "%u\n", tz->tzp->sustainable_power); | |
1033 | else | |
1034 | return -EIO; | |
1035 | } | |
1036 | ||
1037 | static ssize_t | |
1038 | sustainable_power_store(struct device *dev, struct device_attribute *devattr, | |
1039 | const char *buf, size_t count) | |
1040 | { | |
1041 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
1042 | u32 sustainable_power; | |
1043 | ||
1044 | if (!tz->tzp) | |
1045 | return -EIO; | |
1046 | ||
1047 | if (kstrtou32(buf, 10, &sustainable_power)) | |
1048 | return -EINVAL; | |
1049 | ||
1050 | tz->tzp->sustainable_power = sustainable_power; | |
1051 | ||
1052 | return count; | |
1053 | } | |
1054 | static DEVICE_ATTR(sustainable_power, S_IWUSR | S_IRUGO, sustainable_power_show, | |
1055 | sustainable_power_store); | |
1056 | ||
1057 | #define create_s32_tzp_attr(name) \ | |
1058 | static ssize_t \ | |
1059 | name##_show(struct device *dev, struct device_attribute *devattr, \ | |
1060 | char *buf) \ | |
1061 | { \ | |
1062 | struct thermal_zone_device *tz = to_thermal_zone(dev); \ | |
1063 | \ | |
1064 | if (tz->tzp) \ | |
1065 | return sprintf(buf, "%u\n", tz->tzp->name); \ | |
1066 | else \ | |
1067 | return -EIO; \ | |
1068 | } \ | |
1069 | \ | |
1070 | static ssize_t \ | |
1071 | name##_store(struct device *dev, struct device_attribute *devattr, \ | |
1072 | const char *buf, size_t count) \ | |
1073 | { \ | |
1074 | struct thermal_zone_device *tz = to_thermal_zone(dev); \ | |
1075 | s32 value; \ | |
1076 | \ | |
1077 | if (!tz->tzp) \ | |
1078 | return -EIO; \ | |
1079 | \ | |
1080 | if (kstrtos32(buf, 10, &value)) \ | |
1081 | return -EINVAL; \ | |
1082 | \ | |
1083 | tz->tzp->name = value; \ | |
1084 | \ | |
1085 | return count; \ | |
1086 | } \ | |
1087 | static DEVICE_ATTR(name, S_IWUSR | S_IRUGO, name##_show, name##_store) | |
1088 | ||
1089 | create_s32_tzp_attr(k_po); | |
1090 | create_s32_tzp_attr(k_pu); | |
1091 | create_s32_tzp_attr(k_i); | |
1092 | create_s32_tzp_attr(k_d); | |
1093 | create_s32_tzp_attr(integral_cutoff); | |
9d0be7f4 EV |
1094 | create_s32_tzp_attr(slope); |
1095 | create_s32_tzp_attr(offset); | |
1cac41cb | 1096 | create_s32_tzp_attr(integral_max); |
9f38271c JM |
1097 | #undef create_s32_tzp_attr |
1098 | ||
1099 | static struct device_attribute *dev_tzp_attrs[] = { | |
1100 | &dev_attr_sustainable_power, | |
1101 | &dev_attr_k_po, | |
1102 | &dev_attr_k_pu, | |
1103 | &dev_attr_k_i, | |
1104 | &dev_attr_k_d, | |
1105 | &dev_attr_integral_cutoff, | |
9d0be7f4 EV |
1106 | &dev_attr_slope, |
1107 | &dev_attr_offset, | |
1cac41cb | 1108 | &dev_attr_integral_max, |
9f38271c JM |
1109 | }; |
1110 | ||
1111 | static int create_tzp_attrs(struct device *dev) | |
1112 | { | |
1113 | int i; | |
1114 | ||
1115 | for (i = 0; i < ARRAY_SIZE(dev_tzp_attrs); i++) { | |
1116 | int ret; | |
1117 | struct device_attribute *dev_attr = dev_tzp_attrs[i]; | |
1118 | ||
1119 | ret = device_create_file(dev, dev_attr); | |
1120 | if (ret) | |
1121 | return ret; | |
1122 | } | |
1123 | ||
1124 | return 0; | |
1125 | } | |
1126 | ||
35b11d2e JM |
1127 | /** |
1128 | * power_actor_get_max_power() - get the maximum power that a cdev can consume | |
1129 | * @cdev: pointer to &thermal_cooling_device | |
1130 | * @tz: a valid thermal zone device pointer | |
1131 | * @max_power: pointer in which to store the maximum power | |
1132 | * | |
1133 | * Calculate the maximum power consumption in milliwats that the | |
1134 | * cooling device can currently consume and store it in @max_power. | |
1135 | * | |
1136 | * Return: 0 on success, -EINVAL if @cdev doesn't support the | |
1137 | * power_actor API or -E* on other error. | |
1138 | */ | |
1139 | int power_actor_get_max_power(struct thermal_cooling_device *cdev, | |
1140 | struct thermal_zone_device *tz, u32 *max_power) | |
1141 | { | |
1142 | if (!cdev_is_power_actor(cdev)) | |
1143 | return -EINVAL; | |
1144 | ||
1145 | return cdev->ops->state2power(cdev, tz, 0, max_power); | |
1146 | } | |
1147 | ||
c973c3bc JM |
1148 | /** |
1149 | * power_actor_get_min_power() - get the mainimum power that a cdev can consume | |
1150 | * @cdev: pointer to &thermal_cooling_device | |
1151 | * @tz: a valid thermal zone device pointer | |
1152 | * @min_power: pointer in which to store the minimum power | |
1153 | * | |
1154 | * Calculate the minimum power consumption in milliwatts that the | |
1155 | * cooling device can currently consume and store it in @min_power. | |
1156 | * | |
1157 | * Return: 0 on success, -EINVAL if @cdev doesn't support the | |
1158 | * power_actor API or -E* on other error. | |
1159 | */ | |
1160 | int power_actor_get_min_power(struct thermal_cooling_device *cdev, | |
1161 | struct thermal_zone_device *tz, u32 *min_power) | |
1162 | { | |
1163 | unsigned long max_state; | |
1164 | int ret; | |
1165 | ||
1166 | if (!cdev_is_power_actor(cdev)) | |
1167 | return -EINVAL; | |
1168 | ||
1169 | ret = cdev->ops->get_max_state(cdev, &max_state); | |
1170 | if (ret) | |
1171 | return ret; | |
1172 | ||
1173 | return cdev->ops->state2power(cdev, tz, max_state, min_power); | |
1174 | } | |
1175 | ||
35b11d2e JM |
1176 | /** |
1177 | * power_actor_set_power() - limit the maximum power that a cooling device can consume | |
1178 | * @cdev: pointer to &thermal_cooling_device | |
1179 | * @instance: thermal instance to update | |
1180 | * @power: the power in milliwatts | |
1181 | * | |
1182 | * Set the cooling device to consume at most @power milliwatts. | |
1183 | * | |
1184 | * Return: 0 on success, -EINVAL if the cooling device does not | |
1185 | * implement the power actor API or -E* for other failures. | |
1186 | */ | |
1187 | int power_actor_set_power(struct thermal_cooling_device *cdev, | |
1188 | struct thermal_instance *instance, u32 power) | |
1189 | { | |
1190 | unsigned long state; | |
1191 | int ret; | |
1192 | ||
1193 | if (!cdev_is_power_actor(cdev)) | |
1194 | return -EINVAL; | |
1195 | ||
1196 | ret = cdev->ops->power2state(cdev, instance->tz, power, &state); | |
1197 | if (ret) | |
1198 | return ret; | |
1199 | ||
1200 | instance->target = state; | |
1201 | cdev->updated = false; | |
1202 | thermal_cdev_update(cdev); | |
1203 | ||
1204 | return 0; | |
1205 | } | |
1206 | ||
203d3d4a ZR |
1207 | static DEVICE_ATTR(type, 0444, type_show, NULL); |
1208 | static DEVICE_ATTR(temp, 0444, temp_show, NULL); | |
1209 | static DEVICE_ATTR(mode, 0644, mode_show, mode_store); | |
886ee546 | 1210 | static DEVICE_ATTR(passive, S_IRUGO | S_IWUSR, passive_show, passive_store); |
5a2c090b | 1211 | static DEVICE_ATTR(policy, S_IRUGO | S_IWUSR, policy_show, policy_store); |
25a0a5ce | 1212 | static DEVICE_ATTR(available_policies, S_IRUGO, available_policies_show, NULL); |
203d3d4a | 1213 | |
203d3d4a ZR |
1214 | /* sys I/F for cooling device */ |
1215 | #define to_cooling_device(_dev) \ | |
1216 | container_of(_dev, struct thermal_cooling_device, device) | |
1217 | ||
1218 | static ssize_t | |
1219 | thermal_cooling_device_type_show(struct device *dev, | |
1220 | struct device_attribute *attr, char *buf) | |
1221 | { | |
1222 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
1223 | ||
1224 | return sprintf(buf, "%s\n", cdev->type); | |
1225 | } | |
1226 | ||
1227 | static ssize_t | |
1228 | thermal_cooling_device_max_state_show(struct device *dev, | |
1229 | struct device_attribute *attr, char *buf) | |
1230 | { | |
1231 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df MG |
1232 | unsigned long state; |
1233 | int ret; | |
203d3d4a | 1234 | |
6503e5df MG |
1235 | ret = cdev->ops->get_max_state(cdev, &state); |
1236 | if (ret) | |
1237 | return ret; | |
1238 | return sprintf(buf, "%ld\n", state); | |
203d3d4a ZR |
1239 | } |
1240 | ||
1241 | static ssize_t | |
1242 | thermal_cooling_device_cur_state_show(struct device *dev, | |
1243 | struct device_attribute *attr, char *buf) | |
1244 | { | |
1245 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df MG |
1246 | unsigned long state; |
1247 | int ret; | |
203d3d4a | 1248 | |
6503e5df MG |
1249 | ret = cdev->ops->get_cur_state(cdev, &state); |
1250 | if (ret) | |
1251 | return ret; | |
1252 | return sprintf(buf, "%ld\n", state); | |
203d3d4a ZR |
1253 | } |
1254 | ||
1255 | static ssize_t | |
1256 | thermal_cooling_device_cur_state_store(struct device *dev, | |
1257 | struct device_attribute *attr, | |
1258 | const char *buf, size_t count) | |
1259 | { | |
1260 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df | 1261 | unsigned long state; |
203d3d4a ZR |
1262 | int result; |
1263 | ||
6503e5df | 1264 | if (!sscanf(buf, "%ld\n", &state)) |
203d3d4a ZR |
1265 | return -EINVAL; |
1266 | ||
edb94918 | 1267 | if ((long)state < 0) |
203d3d4a ZR |
1268 | return -EINVAL; |
1269 | ||
1270 | result = cdev->ops->set_cur_state(cdev, state); | |
1271 | if (result) | |
1272 | return result; | |
1273 | return count; | |
1274 | } | |
1275 | ||
1276 | static struct device_attribute dev_attr_cdev_type = | |
543a9561 | 1277 | __ATTR(type, 0444, thermal_cooling_device_type_show, NULL); |
203d3d4a ZR |
1278 | static DEVICE_ATTR(max_state, 0444, |
1279 | thermal_cooling_device_max_state_show, NULL); | |
1280 | static DEVICE_ATTR(cur_state, 0644, | |
1281 | thermal_cooling_device_cur_state_show, | |
1282 | thermal_cooling_device_cur_state_store); | |
1283 | ||
1284 | static ssize_t | |
1285 | thermal_cooling_device_trip_point_show(struct device *dev, | |
543a9561 | 1286 | struct device_attribute *attr, char *buf) |
203d3d4a | 1287 | { |
b81b6ba3 | 1288 | struct thermal_instance *instance; |
203d3d4a ZR |
1289 | |
1290 | instance = | |
b81b6ba3 | 1291 | container_of(attr, struct thermal_instance, attr); |
203d3d4a ZR |
1292 | |
1293 | if (instance->trip == THERMAL_TRIPS_NONE) | |
1294 | return sprintf(buf, "-1\n"); | |
1295 | else | |
1296 | return sprintf(buf, "%d\n", instance->trip); | |
1297 | } | |
1298 | ||
2dc10f89 MK |
1299 | static struct attribute *cooling_device_attrs[] = { |
1300 | &dev_attr_cdev_type.attr, | |
1301 | &dev_attr_max_state.attr, | |
1302 | &dev_attr_cur_state.attr, | |
1303 | NULL, | |
1304 | }; | |
1305 | ||
1306 | static const struct attribute_group cooling_device_attr_group = { | |
1307 | .attrs = cooling_device_attrs, | |
1308 | }; | |
1309 | ||
1310 | static const struct attribute_group *cooling_device_attr_groups[] = { | |
1311 | &cooling_device_attr_group, | |
1312 | NULL, | |
1313 | }; | |
1314 | ||
db916513 JM |
1315 | static ssize_t |
1316 | thermal_cooling_device_weight_show(struct device *dev, | |
1317 | struct device_attribute *attr, char *buf) | |
1318 | { | |
1319 | struct thermal_instance *instance; | |
1320 | ||
1321 | instance = container_of(attr, struct thermal_instance, weight_attr); | |
1322 | ||
1323 | return sprintf(buf, "%d\n", instance->weight); | |
1324 | } | |
1325 | ||
1326 | static ssize_t | |
1327 | thermal_cooling_device_weight_store(struct device *dev, | |
1328 | struct device_attribute *attr, | |
1329 | const char *buf, size_t count) | |
1330 | { | |
1331 | struct thermal_instance *instance; | |
1332 | int ret, weight; | |
1333 | ||
1334 | ret = kstrtoint(buf, 0, &weight); | |
1335 | if (ret) | |
1336 | return ret; | |
1337 | ||
1338 | instance = container_of(attr, struct thermal_instance, weight_attr); | |
1339 | instance->weight = weight; | |
1340 | ||
1341 | return count; | |
1342 | } | |
203d3d4a ZR |
1343 | /* Device management */ |
1344 | ||
1345 | /** | |
d2e4eb83 EV |
1346 | * thermal_zone_bind_cooling_device() - bind a cooling device to a thermal zone |
1347 | * @tz: pointer to struct thermal_zone_device | |
203d3d4a ZR |
1348 | * @trip: indicates which trip point the cooling devices is |
1349 | * associated with in this thermal zone. | |
d2e4eb83 EV |
1350 | * @cdev: pointer to struct thermal_cooling_device |
1351 | * @upper: the Maximum cooling state for this trip point. | |
1352 | * THERMAL_NO_LIMIT means no upper limit, | |
1353 | * and the cooling device can be in max_state. | |
1354 | * @lower: the Minimum cooling state can be used for this trip point. | |
1355 | * THERMAL_NO_LIMIT means no lower limit, | |
1356 | * and the cooling device can be in cooling state 0. | |
6cd9e9f6 KS |
1357 | * @weight: The weight of the cooling device to be bound to the |
1358 | * thermal zone. Use THERMAL_WEIGHT_DEFAULT for the | |
1359 | * default value | |
543a9561 | 1360 | * |
d2e4eb83 EV |
1361 | * This interface function bind a thermal cooling device to the certain trip |
1362 | * point of a thermal zone device. | |
543a9561 | 1363 | * This function is usually called in the thermal zone device .bind callback. |
d2e4eb83 EV |
1364 | * |
1365 | * Return: 0 on success, the proper error value otherwise. | |
203d3d4a ZR |
1366 | */ |
1367 | int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, | |
1368 | int trip, | |
9d99842f | 1369 | struct thermal_cooling_device *cdev, |
6cd9e9f6 KS |
1370 | unsigned long upper, unsigned long lower, |
1371 | unsigned int weight) | |
203d3d4a | 1372 | { |
b81b6ba3 ZR |
1373 | struct thermal_instance *dev; |
1374 | struct thermal_instance *pos; | |
c7516709 TS |
1375 | struct thermal_zone_device *pos1; |
1376 | struct thermal_cooling_device *pos2; | |
74051ba5 | 1377 | unsigned long max_state; |
9a3031dc | 1378 | int result, ret; |
203d3d4a | 1379 | |
543a9561 | 1380 | if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE)) |
203d3d4a ZR |
1381 | return -EINVAL; |
1382 | ||
c7516709 TS |
1383 | list_for_each_entry(pos1, &thermal_tz_list, node) { |
1384 | if (pos1 == tz) | |
1385 | break; | |
1386 | } | |
1387 | list_for_each_entry(pos2, &thermal_cdev_list, node) { | |
1388 | if (pos2 == cdev) | |
1389 | break; | |
1390 | } | |
1391 | ||
1392 | if (tz != pos1 || cdev != pos2) | |
203d3d4a ZR |
1393 | return -EINVAL; |
1394 | ||
9a3031dc LM |
1395 | ret = cdev->ops->get_max_state(cdev, &max_state); |
1396 | if (ret) | |
1397 | return ret; | |
9d99842f ZR |
1398 | |
1399 | /* lower default 0, upper default max_state */ | |
1400 | lower = lower == THERMAL_NO_LIMIT ? 0 : lower; | |
1401 | upper = upper == THERMAL_NO_LIMIT ? max_state : upper; | |
1402 | ||
1403 | if (lower > upper || upper > max_state) | |
1404 | return -EINVAL; | |
1405 | ||
203d3d4a | 1406 | dev = |
b81b6ba3 | 1407 | kzalloc(sizeof(struct thermal_instance), GFP_KERNEL); |
203d3d4a ZR |
1408 | if (!dev) |
1409 | return -ENOMEM; | |
1410 | dev->tz = tz; | |
1411 | dev->cdev = cdev; | |
1412 | dev->trip = trip; | |
9d99842f ZR |
1413 | dev->upper = upper; |
1414 | dev->lower = lower; | |
ce119f83 | 1415 | dev->target = THERMAL_NO_TARGET; |
6cd9e9f6 | 1416 | dev->weight = weight; |
74051ba5 | 1417 | |
203d3d4a ZR |
1418 | result = get_idr(&tz->idr, &tz->lock, &dev->id); |
1419 | if (result) | |
1420 | goto free_mem; | |
1421 | ||
1422 | sprintf(dev->name, "cdev%d", dev->id); | |
1423 | result = | |
1424 | sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev->name); | |
1425 | if (result) | |
1426 | goto release_idr; | |
1427 | ||
1428 | sprintf(dev->attr_name, "cdev%d_trip_point", dev->id); | |
975f8c56 | 1429 | sysfs_attr_init(&dev->attr.attr); |
203d3d4a ZR |
1430 | dev->attr.attr.name = dev->attr_name; |
1431 | dev->attr.attr.mode = 0444; | |
1432 | dev->attr.show = thermal_cooling_device_trip_point_show; | |
1433 | result = device_create_file(&tz->device, &dev->attr); | |
1434 | if (result) | |
1435 | goto remove_symbol_link; | |
1436 | ||
db916513 JM |
1437 | sprintf(dev->weight_attr_name, "cdev%d_weight", dev->id); |
1438 | sysfs_attr_init(&dev->weight_attr.attr); | |
1439 | dev->weight_attr.attr.name = dev->weight_attr_name; | |
1440 | dev->weight_attr.attr.mode = S_IWUSR | S_IRUGO; | |
1441 | dev->weight_attr.show = thermal_cooling_device_weight_show; | |
1442 | dev->weight_attr.store = thermal_cooling_device_weight_store; | |
1443 | result = device_create_file(&tz->device, &dev->weight_attr); | |
1444 | if (result) | |
1445 | goto remove_trip_file; | |
1446 | ||
203d3d4a | 1447 | mutex_lock(&tz->lock); |
f4a821ce | 1448 | mutex_lock(&cdev->lock); |
cddf31b3 | 1449 | list_for_each_entry(pos, &tz->thermal_instances, tz_node) |
203d3d4a ZR |
1450 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
1451 | result = -EEXIST; | |
1452 | break; | |
1453 | } | |
b5e4ae62 | 1454 | if (!result) { |
cddf31b3 | 1455 | list_add_tail(&dev->tz_node, &tz->thermal_instances); |
b5e4ae62 | 1456 | list_add_tail(&dev->cdev_node, &cdev->thermal_instances); |
27f35614 | 1457 | atomic_set(&tz->need_update, 1); |
b5e4ae62 | 1458 | } |
f4a821ce | 1459 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
1460 | mutex_unlock(&tz->lock); |
1461 | ||
1462 | if (!result) | |
1463 | return 0; | |
1464 | ||
db916513 JM |
1465 | device_remove_file(&tz->device, &dev->weight_attr); |
1466 | remove_trip_file: | |
203d3d4a | 1467 | device_remove_file(&tz->device, &dev->attr); |
caca8b80 | 1468 | remove_symbol_link: |
203d3d4a | 1469 | sysfs_remove_link(&tz->device.kobj, dev->name); |
caca8b80 | 1470 | release_idr: |
203d3d4a | 1471 | release_idr(&tz->idr, &tz->lock, dev->id); |
caca8b80 | 1472 | free_mem: |
203d3d4a ZR |
1473 | kfree(dev); |
1474 | return result; | |
1475 | } | |
910cb1e3 | 1476 | EXPORT_SYMBOL_GPL(thermal_zone_bind_cooling_device); |
203d3d4a ZR |
1477 | |
1478 | /** | |
9892e5dc EV |
1479 | * thermal_zone_unbind_cooling_device() - unbind a cooling device from a |
1480 | * thermal zone. | |
1481 | * @tz: pointer to a struct thermal_zone_device. | |
203d3d4a ZR |
1482 | * @trip: indicates which trip point the cooling devices is |
1483 | * associated with in this thermal zone. | |
9892e5dc | 1484 | * @cdev: pointer to a struct thermal_cooling_device. |
543a9561 | 1485 | * |
9892e5dc EV |
1486 | * This interface function unbind a thermal cooling device from the certain |
1487 | * trip point of a thermal zone device. | |
543a9561 | 1488 | * This function is usually called in the thermal zone device .unbind callback. |
9892e5dc EV |
1489 | * |
1490 | * Return: 0 on success, the proper error value otherwise. | |
203d3d4a ZR |
1491 | */ |
1492 | int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz, | |
1493 | int trip, | |
1494 | struct thermal_cooling_device *cdev) | |
1495 | { | |
b81b6ba3 | 1496 | struct thermal_instance *pos, *next; |
203d3d4a ZR |
1497 | |
1498 | mutex_lock(&tz->lock); | |
f4a821ce | 1499 | mutex_lock(&cdev->lock); |
cddf31b3 | 1500 | list_for_each_entry_safe(pos, next, &tz->thermal_instances, tz_node) { |
543a9561 | 1501 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
cddf31b3 | 1502 | list_del(&pos->tz_node); |
b5e4ae62 | 1503 | list_del(&pos->cdev_node); |
f4a821ce | 1504 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
1505 | mutex_unlock(&tz->lock); |
1506 | goto unbind; | |
1507 | } | |
1508 | } | |
f4a821ce | 1509 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
1510 | mutex_unlock(&tz->lock); |
1511 | ||
1512 | return -ENODEV; | |
1513 | ||
caca8b80 | 1514 | unbind: |
528464ea | 1515 | device_remove_file(&tz->device, &pos->weight_attr); |
203d3d4a ZR |
1516 | device_remove_file(&tz->device, &pos->attr); |
1517 | sysfs_remove_link(&tz->device.kobj, pos->name); | |
1518 | release_idr(&tz->idr, &tz->lock, pos->id); | |
1519 | kfree(pos); | |
1520 | return 0; | |
1521 | } | |
910cb1e3 | 1522 | EXPORT_SYMBOL_GPL(thermal_zone_unbind_cooling_device); |
203d3d4a ZR |
1523 | |
1524 | static void thermal_release(struct device *dev) | |
1525 | { | |
1526 | struct thermal_zone_device *tz; | |
1527 | struct thermal_cooling_device *cdev; | |
1528 | ||
caca8b80 JP |
1529 | if (!strncmp(dev_name(dev), "thermal_zone", |
1530 | sizeof("thermal_zone") - 1)) { | |
203d3d4a ZR |
1531 | tz = to_thermal_zone(dev); |
1532 | kfree(tz); | |
732e4c8d | 1533 | } else if(!strncmp(dev_name(dev), "cooling_device", |
1534 | sizeof("cooling_device") - 1)){ | |
203d3d4a ZR |
1535 | cdev = to_cooling_device(dev); |
1536 | kfree(cdev); | |
1537 | } | |
1538 | } | |
1539 | ||
1540 | static struct class thermal_class = { | |
1541 | .name = "thermal", | |
1542 | .dev_release = thermal_release, | |
1543 | }; | |
1544 | ||
1545 | /** | |
a116b5d4 EV |
1546 | * __thermal_cooling_device_register() - register a new thermal cooling device |
1547 | * @np: a pointer to a device tree node. | |
203d3d4a ZR |
1548 | * @type: the thermal cooling device type. |
1549 | * @devdata: device private data. | |
1550 | * @ops: standard thermal cooling devices callbacks. | |
3a6eccb3 EV |
1551 | * |
1552 | * This interface function adds a new thermal cooling device (fan/processor/...) | |
1553 | * to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself | |
1554 | * to all the thermal zone devices registered at the same time. | |
a116b5d4 EV |
1555 | * It also gives the opportunity to link the cooling device to a device tree |
1556 | * node, so that it can be bound to a thermal zone created out of device tree. | |
3a6eccb3 EV |
1557 | * |
1558 | * Return: a pointer to the created struct thermal_cooling_device or an | |
1559 | * ERR_PTR. Caller must check return value with IS_ERR*() helpers. | |
203d3d4a | 1560 | */ |
a116b5d4 EV |
1561 | static struct thermal_cooling_device * |
1562 | __thermal_cooling_device_register(struct device_node *np, | |
1563 | char *type, void *devdata, | |
1564 | const struct thermal_cooling_device_ops *ops) | |
203d3d4a ZR |
1565 | { |
1566 | struct thermal_cooling_device *cdev; | |
27f35614 | 1567 | struct thermal_zone_device *pos = NULL; |
203d3d4a ZR |
1568 | int result; |
1569 | ||
204dd1d3 | 1570 | if (type && strlen(type) >= THERMAL_NAME_LENGTH) |
3e6fda5c | 1571 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1572 | |
1573 | if (!ops || !ops->get_max_state || !ops->get_cur_state || | |
543a9561 | 1574 | !ops->set_cur_state) |
3e6fda5c | 1575 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1576 | |
1577 | cdev = kzalloc(sizeof(struct thermal_cooling_device), GFP_KERNEL); | |
1578 | if (!cdev) | |
3e6fda5c | 1579 | return ERR_PTR(-ENOMEM); |
203d3d4a ZR |
1580 | |
1581 | result = get_idr(&thermal_cdev_idr, &thermal_idr_lock, &cdev->id); | |
1582 | if (result) { | |
1583 | kfree(cdev); | |
3e6fda5c | 1584 | return ERR_PTR(result); |
203d3d4a ZR |
1585 | } |
1586 | ||
c7a8b9d9 | 1587 | strlcpy(cdev->type, type ? : "", sizeof(cdev->type)); |
f4a821ce | 1588 | mutex_init(&cdev->lock); |
b5e4ae62 | 1589 | INIT_LIST_HEAD(&cdev->thermal_instances); |
a116b5d4 | 1590 | cdev->np = np; |
203d3d4a | 1591 | cdev->ops = ops; |
5ca0cce5 | 1592 | cdev->updated = false; |
203d3d4a | 1593 | cdev->device.class = &thermal_class; |
2dc10f89 | 1594 | cdev->device.groups = cooling_device_attr_groups; |
203d3d4a | 1595 | cdev->devdata = devdata; |
354655ea | 1596 | dev_set_name(&cdev->device, "cooling_device%d", cdev->id); |
203d3d4a ZR |
1597 | result = device_register(&cdev->device); |
1598 | if (result) { | |
1599 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
1600 | kfree(cdev); | |
3e6fda5c | 1601 | return ERR_PTR(result); |
203d3d4a ZR |
1602 | } |
1603 | ||
7e8ee1e9 | 1604 | /* Add 'this' new cdev to the global cdev list */ |
203d3d4a ZR |
1605 | mutex_lock(&thermal_list_lock); |
1606 | list_add(&cdev->node, &thermal_cdev_list); | |
203d3d4a ZR |
1607 | mutex_unlock(&thermal_list_lock); |
1608 | ||
7e8ee1e9 D |
1609 | /* Update binding information for 'this' new cdev */ |
1610 | bind_cdev(cdev); | |
1611 | ||
27f35614 CY |
1612 | mutex_lock(&thermal_list_lock); |
1613 | list_for_each_entry(pos, &thermal_tz_list, node) | |
1614 | if (atomic_cmpxchg(&pos->need_update, 1, 0)) | |
1615 | thermal_zone_device_update(pos); | |
1616 | mutex_unlock(&thermal_list_lock); | |
1617 | ||
7e8ee1e9 | 1618 | return cdev; |
203d3d4a | 1619 | } |
a116b5d4 EV |
1620 | |
1621 | /** | |
1622 | * thermal_cooling_device_register() - register a new thermal cooling device | |
1623 | * @type: the thermal cooling device type. | |
1624 | * @devdata: device private data. | |
1625 | * @ops: standard thermal cooling devices callbacks. | |
1626 | * | |
1627 | * This interface function adds a new thermal cooling device (fan/processor/...) | |
1628 | * to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself | |
1629 | * to all the thermal zone devices registered at the same time. | |
1630 | * | |
1631 | * Return: a pointer to the created struct thermal_cooling_device or an | |
1632 | * ERR_PTR. Caller must check return value with IS_ERR*() helpers. | |
1633 | */ | |
1634 | struct thermal_cooling_device * | |
1635 | thermal_cooling_device_register(char *type, void *devdata, | |
1636 | const struct thermal_cooling_device_ops *ops) | |
1637 | { | |
1638 | return __thermal_cooling_device_register(NULL, type, devdata, ops); | |
1639 | } | |
910cb1e3 | 1640 | EXPORT_SYMBOL_GPL(thermal_cooling_device_register); |
203d3d4a | 1641 | |
a116b5d4 EV |
1642 | /** |
1643 | * thermal_of_cooling_device_register() - register an OF thermal cooling device | |
1644 | * @np: a pointer to a device tree node. | |
1645 | * @type: the thermal cooling device type. | |
1646 | * @devdata: device private data. | |
1647 | * @ops: standard thermal cooling devices callbacks. | |
1648 | * | |
1649 | * This function will register a cooling device with device tree node reference. | |
1650 | * This interface function adds a new thermal cooling device (fan/processor/...) | |
1651 | * to /sys/class/thermal/ folder as cooling_device[0-*]. It tries to bind itself | |
1652 | * to all the thermal zone devices registered at the same time. | |
1653 | * | |
1654 | * Return: a pointer to the created struct thermal_cooling_device or an | |
1655 | * ERR_PTR. Caller must check return value with IS_ERR*() helpers. | |
1656 | */ | |
1657 | struct thermal_cooling_device * | |
1658 | thermal_of_cooling_device_register(struct device_node *np, | |
1659 | char *type, void *devdata, | |
1660 | const struct thermal_cooling_device_ops *ops) | |
1661 | { | |
1662 | return __thermal_cooling_device_register(np, type, devdata, ops); | |
1663 | } | |
1664 | EXPORT_SYMBOL_GPL(thermal_of_cooling_device_register); | |
1665 | ||
203d3d4a ZR |
1666 | /** |
1667 | * thermal_cooling_device_unregister - removes the registered thermal cooling device | |
203d3d4a ZR |
1668 | * @cdev: the thermal cooling device to remove. |
1669 | * | |
1670 | * thermal_cooling_device_unregister() must be called when the device is no | |
1671 | * longer needed. | |
1672 | */ | |
7e8ee1e9 | 1673 | void thermal_cooling_device_unregister(struct thermal_cooling_device *cdev) |
203d3d4a | 1674 | { |
7e8ee1e9 D |
1675 | int i; |
1676 | const struct thermal_zone_params *tzp; | |
203d3d4a ZR |
1677 | struct thermal_zone_device *tz; |
1678 | struct thermal_cooling_device *pos = NULL; | |
1679 | ||
1680 | if (!cdev) | |
1681 | return; | |
1682 | ||
1683 | mutex_lock(&thermal_list_lock); | |
1684 | list_for_each_entry(pos, &thermal_cdev_list, node) | |
1685 | if (pos == cdev) | |
1686 | break; | |
1687 | if (pos != cdev) { | |
1688 | /* thermal cooling device not found */ | |
1689 | mutex_unlock(&thermal_list_lock); | |
1690 | return; | |
1691 | } | |
1692 | list_del(&cdev->node); | |
7e8ee1e9 D |
1693 | |
1694 | /* Unbind all thermal zones associated with 'this' cdev */ | |
203d3d4a | 1695 | list_for_each_entry(tz, &thermal_tz_list, node) { |
7e8ee1e9 D |
1696 | if (tz->ops->unbind) { |
1697 | tz->ops->unbind(tz, cdev); | |
1698 | continue; | |
1699 | } | |
1700 | ||
1701 | if (!tz->tzp || !tz->tzp->tbp) | |
203d3d4a | 1702 | continue; |
7e8ee1e9 D |
1703 | |
1704 | tzp = tz->tzp; | |
1705 | for (i = 0; i < tzp->num_tbps; i++) { | |
1706 | if (tzp->tbp[i].cdev == cdev) { | |
1707 | __unbind(tz, tzp->tbp[i].trip_mask, cdev); | |
1708 | tzp->tbp[i].cdev = NULL; | |
1709 | } | |
1710 | } | |
203d3d4a | 1711 | } |
7e8ee1e9 | 1712 | |
203d3d4a | 1713 | mutex_unlock(&thermal_list_lock); |
7e8ee1e9 | 1714 | |
203d3d4a | 1715 | if (cdev->type[0]) |
543a9561 | 1716 | device_remove_file(&cdev->device, &dev_attr_cdev_type); |
203d3d4a ZR |
1717 | device_remove_file(&cdev->device, &dev_attr_max_state); |
1718 | device_remove_file(&cdev->device, &dev_attr_cur_state); | |
1719 | ||
1720 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
1721 | device_unregister(&cdev->device); | |
1722 | return; | |
1723 | } | |
910cb1e3 | 1724 | EXPORT_SYMBOL_GPL(thermal_cooling_device_unregister); |
203d3d4a | 1725 | |
dc765482 | 1726 | void thermal_cdev_update(struct thermal_cooling_device *cdev) |
ce119f83 ZR |
1727 | { |
1728 | struct thermal_instance *instance; | |
1729 | unsigned long target = 0; | |
1730 | ||
1731 | /* cooling device is updated*/ | |
1732 | if (cdev->updated) | |
1733 | return; | |
1734 | ||
f4a821ce | 1735 | mutex_lock(&cdev->lock); |
ce119f83 ZR |
1736 | /* Make sure cdev enters the deepest cooling state */ |
1737 | list_for_each_entry(instance, &cdev->thermal_instances, cdev_node) { | |
06475b55 AL |
1738 | dev_dbg(&cdev->device, "zone%d->target=%lu\n", |
1739 | instance->tz->id, instance->target); | |
ce119f83 ZR |
1740 | if (instance->target == THERMAL_NO_TARGET) |
1741 | continue; | |
1742 | if (instance->target > target) | |
1743 | target = instance->target; | |
1744 | } | |
f4a821ce | 1745 | mutex_unlock(&cdev->lock); |
ce119f83 ZR |
1746 | cdev->ops->set_cur_state(cdev, target); |
1747 | cdev->updated = true; | |
39811569 | 1748 | trace_cdev_update(cdev, target); |
06475b55 | 1749 | dev_dbg(&cdev->device, "set to state %lu\n", target); |
ce119f83 | 1750 | } |
dc765482 | 1751 | EXPORT_SYMBOL(thermal_cdev_update); |
ce119f83 | 1752 | |
f2b4caaf | 1753 | /** |
7b73c993 | 1754 | * thermal_notify_framework - Sensor drivers use this API to notify framework |
f2b4caaf D |
1755 | * @tz: thermal zone device |
1756 | * @trip: indicates which trip point has been crossed | |
1757 | * | |
1758 | * This function handles the trip events from sensor drivers. It starts | |
1759 | * throttling the cooling devices according to the policy configured. | |
1760 | * For CRITICAL and HOT trip points, this notifies the respective drivers, | |
1761 | * and does actual throttling for other trip points i.e ACTIVE and PASSIVE. | |
1762 | * The throttling policy is based on the configured platform data; if no | |
1763 | * platform data is provided, this uses the step_wise throttling policy. | |
1764 | */ | |
7b73c993 | 1765 | void thermal_notify_framework(struct thermal_zone_device *tz, int trip) |
f2b4caaf | 1766 | { |
1cac41cb MB |
1767 | if (atomic_read(&in_suspend)) |
1768 | return; | |
1769 | ||
f2b4caaf D |
1770 | handle_thermal_trip(tz, trip); |
1771 | } | |
910cb1e3 | 1772 | EXPORT_SYMBOL_GPL(thermal_notify_framework); |
f2b4caaf | 1773 | |
c56f5c03 | 1774 | /** |
269c174f | 1775 | * create_trip_attrs() - create attributes for trip points |
c56f5c03 D |
1776 | * @tz: the thermal zone device |
1777 | * @mask: Writeable trip point bitmap. | |
269c174f EV |
1778 | * |
1779 | * helper function to instantiate sysfs entries for every trip | |
1780 | * point and its properties of a struct thermal_zone_device. | |
1781 | * | |
1782 | * Return: 0 on success, the proper error value otherwise. | |
c56f5c03 D |
1783 | */ |
1784 | static int create_trip_attrs(struct thermal_zone_device *tz, int mask) | |
1785 | { | |
1786 | int indx; | |
27365a6c | 1787 | int size = sizeof(struct thermal_attr) * tz->trips; |
c56f5c03 | 1788 | |
27365a6c | 1789 | tz->trip_type_attrs = kzalloc(size, GFP_KERNEL); |
c56f5c03 D |
1790 | if (!tz->trip_type_attrs) |
1791 | return -ENOMEM; | |
1792 | ||
27365a6c | 1793 | tz->trip_temp_attrs = kzalloc(size, GFP_KERNEL); |
c56f5c03 D |
1794 | if (!tz->trip_temp_attrs) { |
1795 | kfree(tz->trip_type_attrs); | |
1796 | return -ENOMEM; | |
1797 | } | |
1798 | ||
27365a6c D |
1799 | if (tz->ops->get_trip_hyst) { |
1800 | tz->trip_hyst_attrs = kzalloc(size, GFP_KERNEL); | |
1801 | if (!tz->trip_hyst_attrs) { | |
1802 | kfree(tz->trip_type_attrs); | |
1803 | kfree(tz->trip_temp_attrs); | |
1804 | return -ENOMEM; | |
1805 | } | |
1806 | } | |
c56f5c03 | 1807 | |
27365a6c D |
1808 | |
1809 | for (indx = 0; indx < tz->trips; indx++) { | |
c56f5c03 D |
1810 | /* create trip type attribute */ |
1811 | snprintf(tz->trip_type_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1812 | "trip_point_%d_type", indx); | |
1813 | ||
1814 | sysfs_attr_init(&tz->trip_type_attrs[indx].attr.attr); | |
1815 | tz->trip_type_attrs[indx].attr.attr.name = | |
1816 | tz->trip_type_attrs[indx].name; | |
1817 | tz->trip_type_attrs[indx].attr.attr.mode = S_IRUGO; | |
1818 | tz->trip_type_attrs[indx].attr.show = trip_point_type_show; | |
1819 | ||
1820 | device_create_file(&tz->device, | |
1821 | &tz->trip_type_attrs[indx].attr); | |
1822 | ||
1823 | /* create trip temp attribute */ | |
1824 | snprintf(tz->trip_temp_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1825 | "trip_point_%d_temp", indx); | |
1826 | ||
1827 | sysfs_attr_init(&tz->trip_temp_attrs[indx].attr.attr); | |
1828 | tz->trip_temp_attrs[indx].attr.attr.name = | |
1829 | tz->trip_temp_attrs[indx].name; | |
1830 | tz->trip_temp_attrs[indx].attr.attr.mode = S_IRUGO; | |
1831 | tz->trip_temp_attrs[indx].attr.show = trip_point_temp_show; | |
35e94644 PA |
1832 | if (IS_ENABLED(CONFIG_THERMAL_WRITABLE_TRIPS) && |
1833 | mask & (1 << indx)) { | |
c56f5c03 D |
1834 | tz->trip_temp_attrs[indx].attr.attr.mode |= S_IWUSR; |
1835 | tz->trip_temp_attrs[indx].attr.store = | |
1836 | trip_point_temp_store; | |
1837 | } | |
1838 | ||
1839 | device_create_file(&tz->device, | |
1840 | &tz->trip_temp_attrs[indx].attr); | |
27365a6c D |
1841 | |
1842 | /* create Optional trip hyst attribute */ | |
1843 | if (!tz->ops->get_trip_hyst) | |
1844 | continue; | |
1845 | snprintf(tz->trip_hyst_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1846 | "trip_point_%d_hyst", indx); | |
1847 | ||
1848 | sysfs_attr_init(&tz->trip_hyst_attrs[indx].attr.attr); | |
1849 | tz->trip_hyst_attrs[indx].attr.attr.name = | |
1850 | tz->trip_hyst_attrs[indx].name; | |
1851 | tz->trip_hyst_attrs[indx].attr.attr.mode = S_IRUGO; | |
1852 | tz->trip_hyst_attrs[indx].attr.show = trip_point_hyst_show; | |
1853 | if (tz->ops->set_trip_hyst) { | |
1854 | tz->trip_hyst_attrs[indx].attr.attr.mode |= S_IWUSR; | |
1855 | tz->trip_hyst_attrs[indx].attr.store = | |
1856 | trip_point_hyst_store; | |
1857 | } | |
1858 | ||
1859 | device_create_file(&tz->device, | |
1860 | &tz->trip_hyst_attrs[indx].attr); | |
c56f5c03 D |
1861 | } |
1862 | return 0; | |
1863 | } | |
1864 | ||
1865 | static void remove_trip_attrs(struct thermal_zone_device *tz) | |
1866 | { | |
1867 | int indx; | |
1868 | ||
1869 | for (indx = 0; indx < tz->trips; indx++) { | |
1870 | device_remove_file(&tz->device, | |
1871 | &tz->trip_type_attrs[indx].attr); | |
1872 | device_remove_file(&tz->device, | |
1873 | &tz->trip_temp_attrs[indx].attr); | |
27365a6c D |
1874 | if (tz->ops->get_trip_hyst) |
1875 | device_remove_file(&tz->device, | |
1876 | &tz->trip_hyst_attrs[indx].attr); | |
c56f5c03 D |
1877 | } |
1878 | kfree(tz->trip_type_attrs); | |
1879 | kfree(tz->trip_temp_attrs); | |
27365a6c | 1880 | kfree(tz->trip_hyst_attrs); |
c56f5c03 D |
1881 | } |
1882 | ||
203d3d4a | 1883 | /** |
a00e55f9 | 1884 | * thermal_zone_device_register() - register a new thermal zone device |
203d3d4a ZR |
1885 | * @type: the thermal zone device type |
1886 | * @trips: the number of trip points the thermal zone support | |
c56f5c03 | 1887 | * @mask: a bit string indicating the writeablility of trip points |
203d3d4a ZR |
1888 | * @devdata: private device data |
1889 | * @ops: standard thermal zone device callbacks | |
50125a9b | 1890 | * @tzp: thermal zone platform parameters |
b1569e99 MG |
1891 | * @passive_delay: number of milliseconds to wait between polls when |
1892 | * performing passive cooling | |
1893 | * @polling_delay: number of milliseconds to wait between polls when checking | |
1894 | * whether trip points have been crossed (0 for interrupt | |
1895 | * driven systems) | |
203d3d4a | 1896 | * |
a00e55f9 EV |
1897 | * This interface function adds a new thermal zone device (sensor) to |
1898 | * /sys/class/thermal folder as thermal_zone[0-*]. It tries to bind all the | |
1899 | * thermal cooling devices registered at the same time. | |
203d3d4a | 1900 | * thermal_zone_device_unregister() must be called when the device is no |
1b7ddb84 | 1901 | * longer needed. The passive cooling depends on the .get_trend() return value. |
a00e55f9 EV |
1902 | * |
1903 | * Return: a pointer to the created struct thermal_zone_device or an | |
1904 | * in case of error, an ERR_PTR. Caller must check return value with | |
1905 | * IS_ERR*() helpers. | |
203d3d4a | 1906 | */ |
4b1bf587 | 1907 | struct thermal_zone_device *thermal_zone_device_register(const char *type, |
c56f5c03 | 1908 | int trips, int mask, void *devdata, |
4e5e4705 | 1909 | struct thermal_zone_device_ops *ops, |
6b775e87 | 1910 | struct thermal_zone_params *tzp, |
1b7ddb84 | 1911 | int passive_delay, int polling_delay) |
203d3d4a ZR |
1912 | { |
1913 | struct thermal_zone_device *tz; | |
03a971a2 | 1914 | enum thermal_trip_type trip_type; |
d75936f3 | 1915 | int trip_temp; |
203d3d4a ZR |
1916 | int result; |
1917 | int count; | |
03a971a2 | 1918 | int passive = 0; |
e33df1d2 | 1919 | struct thermal_governor *governor; |
203d3d4a | 1920 | |
204dd1d3 | 1921 | if (type && strlen(type) >= THERMAL_NAME_LENGTH) |
3e6fda5c | 1922 | return ERR_PTR(-EINVAL); |
203d3d4a | 1923 | |
c56f5c03 | 1924 | if (trips > THERMAL_MAX_TRIPS || trips < 0 || mask >> trips) |
3e6fda5c | 1925 | return ERR_PTR(-EINVAL); |
203d3d4a | 1926 | |
81bd4e1c | 1927 | if (!ops) |
3e6fda5c | 1928 | return ERR_PTR(-EINVAL); |
203d3d4a | 1929 | |
83720d0b | 1930 | if (trips > 0 && (!ops->get_trip_type || !ops->get_trip_temp)) |
6b2aa51d EV |
1931 | return ERR_PTR(-EINVAL); |
1932 | ||
203d3d4a ZR |
1933 | tz = kzalloc(sizeof(struct thermal_zone_device), GFP_KERNEL); |
1934 | if (!tz) | |
3e6fda5c | 1935 | return ERR_PTR(-ENOMEM); |
203d3d4a | 1936 | |
2d374139 | 1937 | INIT_LIST_HEAD(&tz->thermal_instances); |
203d3d4a ZR |
1938 | idr_init(&tz->idr); |
1939 | mutex_init(&tz->lock); | |
1940 | result = get_idr(&thermal_tz_idr, &thermal_idr_lock, &tz->id); | |
1941 | if (result) { | |
1942 | kfree(tz); | |
3e6fda5c | 1943 | return ERR_PTR(result); |
203d3d4a ZR |
1944 | } |
1945 | ||
c7a8b9d9 | 1946 | strlcpy(tz->type, type ? : "", sizeof(tz->type)); |
203d3d4a | 1947 | tz->ops = ops; |
50125a9b | 1948 | tz->tzp = tzp; |
203d3d4a ZR |
1949 | tz->device.class = &thermal_class; |
1950 | tz->devdata = devdata; | |
1951 | tz->trips = trips; | |
b1569e99 MG |
1952 | tz->passive_delay = passive_delay; |
1953 | tz->polling_delay = polling_delay; | |
1cac41cb MB |
1954 | #ifdef CONFIG_SCHED_HMP |
1955 | tz->poll_queue_cpu = BOUNDED_CPU; | |
1956 | #endif | |
27f35614 CY |
1957 | /* A new thermal zone needs to be updated anyway. */ |
1958 | atomic_set(&tz->need_update, 1); | |
b1569e99 | 1959 | |
354655ea | 1960 | dev_set_name(&tz->device, "thermal_zone%d", tz->id); |
203d3d4a ZR |
1961 | result = device_register(&tz->device); |
1962 | if (result) { | |
1963 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); | |
1964 | kfree(tz); | |
3e6fda5c | 1965 | return ERR_PTR(result); |
203d3d4a ZR |
1966 | } |
1967 | ||
1968 | /* sys I/F */ | |
1969 | if (type) { | |
1970 | result = device_create_file(&tz->device, &dev_attr_type); | |
1971 | if (result) | |
1972 | goto unregister; | |
1973 | } | |
1974 | ||
1975 | result = device_create_file(&tz->device, &dev_attr_temp); | |
1976 | if (result) | |
1977 | goto unregister; | |
1978 | ||
1979 | if (ops->get_mode) { | |
1980 | result = device_create_file(&tz->device, &dev_attr_mode); | |
1981 | if (result) | |
1982 | goto unregister; | |
1983 | } | |
1984 | ||
c56f5c03 D |
1985 | result = create_trip_attrs(tz, mask); |
1986 | if (result) | |
1987 | goto unregister; | |
1988 | ||
203d3d4a | 1989 | for (count = 0; count < trips; count++) { |
d75936f3 ZR |
1990 | if (tz->ops->get_trip_type(tz, count, &trip_type)) |
1991 | set_bit(count, &tz->trips_disabled); | |
03a971a2 MG |
1992 | if (trip_type == THERMAL_TRIP_PASSIVE) |
1993 | passive = 1; | |
d75936f3 ZR |
1994 | if (tz->ops->get_trip_temp(tz, count, &trip_temp)) |
1995 | set_bit(count, &tz->trips_disabled); | |
1996 | /* Check for bogus trip points */ | |
1997 | if (trip_temp == 0) | |
1998 | set_bit(count, &tz->trips_disabled); | |
203d3d4a ZR |
1999 | } |
2000 | ||
5a2c090b D |
2001 | if (!passive) { |
2002 | result = device_create_file(&tz->device, &dev_attr_passive); | |
2003 | if (result) | |
2004 | goto unregister; | |
2005 | } | |
03a971a2 | 2006 | |
79e5421c SH |
2007 | if (IS_ENABLED(CONFIG_THERMAL_EMULATION)) { |
2008 | result = device_create_file(&tz->device, &dev_attr_emul_temp); | |
2009 | if (result) | |
2010 | goto unregister; | |
2011 | } | |
2012 | ||
5a2c090b D |
2013 | /* Create policy attribute */ |
2014 | result = device_create_file(&tz->device, &dev_attr_policy); | |
03a971a2 MG |
2015 | if (result) |
2016 | goto unregister; | |
2017 | ||
9f38271c JM |
2018 | /* Add thermal zone params */ |
2019 | result = create_tzp_attrs(&tz->device); | |
2020 | if (result) | |
2021 | goto unregister; | |
2022 | ||
25a0a5ce NW |
2023 | /* Create available_policies attribute */ |
2024 | result = device_create_file(&tz->device, &dev_attr_available_policies); | |
2025 | if (result) | |
2026 | goto unregister; | |
2027 | ||
a4a15485 D |
2028 | /* Update 'this' zone's governor information */ |
2029 | mutex_lock(&thermal_governor_lock); | |
2030 | ||
2031 | if (tz->tzp) | |
e33df1d2 | 2032 | governor = __find_governor(tz->tzp->governor_name); |
a4a15485 | 2033 | else |
e33df1d2 JM |
2034 | governor = def_governor; |
2035 | ||
2036 | result = thermal_set_governor(tz, governor); | |
2037 | if (result) { | |
2038 | mutex_unlock(&thermal_governor_lock); | |
2039 | goto unregister; | |
2040 | } | |
a4a15485 D |
2041 | |
2042 | mutex_unlock(&thermal_governor_lock); | |
2043 | ||
ccba4ffd EV |
2044 | if (!tz->tzp || !tz->tzp->no_hwmon) { |
2045 | result = thermal_add_hwmon_sysfs(tz); | |
2046 | if (result) | |
2047 | goto unregister; | |
2048 | } | |
e68b16ab | 2049 | |
203d3d4a ZR |
2050 | mutex_lock(&thermal_list_lock); |
2051 | list_add_tail(&tz->node, &thermal_tz_list); | |
203d3d4a ZR |
2052 | mutex_unlock(&thermal_list_lock); |
2053 | ||
7e8ee1e9 D |
2054 | /* Bind cooling devices for this zone */ |
2055 | bind_tz(tz); | |
2056 | ||
b1569e99 MG |
2057 | INIT_DELAYED_WORK(&(tz->poll_queue), thermal_zone_device_check); |
2058 | ||
774ac8b7 | 2059 | thermal_zone_device_reset(tz); |
27f35614 CY |
2060 | /* Update the new thermal zone and mark it as already updated. */ |
2061 | if (atomic_cmpxchg(&tz->need_update, 1, 0)) | |
2062 | thermal_zone_device_update(tz); | |
b1569e99 | 2063 | |
14015860 | 2064 | return tz; |
203d3d4a | 2065 | |
caca8b80 | 2066 | unregister: |
203d3d4a ZR |
2067 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
2068 | device_unregister(&tz->device); | |
3e6fda5c | 2069 | return ERR_PTR(result); |
203d3d4a | 2070 | } |
910cb1e3 | 2071 | EXPORT_SYMBOL_GPL(thermal_zone_device_register); |
203d3d4a ZR |
2072 | |
2073 | /** | |
2074 | * thermal_device_unregister - removes the registered thermal zone device | |
203d3d4a ZR |
2075 | * @tz: the thermal zone device to remove |
2076 | */ | |
2077 | void thermal_zone_device_unregister(struct thermal_zone_device *tz) | |
2078 | { | |
7e8ee1e9 D |
2079 | int i; |
2080 | const struct thermal_zone_params *tzp; | |
203d3d4a ZR |
2081 | struct thermal_cooling_device *cdev; |
2082 | struct thermal_zone_device *pos = NULL; | |
203d3d4a ZR |
2083 | |
2084 | if (!tz) | |
2085 | return; | |
2086 | ||
7e8ee1e9 D |
2087 | tzp = tz->tzp; |
2088 | ||
203d3d4a ZR |
2089 | mutex_lock(&thermal_list_lock); |
2090 | list_for_each_entry(pos, &thermal_tz_list, node) | |
2091 | if (pos == tz) | |
2092 | break; | |
2093 | if (pos != tz) { | |
2094 | /* thermal zone device not found */ | |
2095 | mutex_unlock(&thermal_list_lock); | |
2096 | return; | |
2097 | } | |
2098 | list_del(&tz->node); | |
7e8ee1e9 D |
2099 | |
2100 | /* Unbind all cdevs associated with 'this' thermal zone */ | |
2101 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
2102 | if (tz->ops->unbind) { | |
2103 | tz->ops->unbind(tz, cdev); | |
2104 | continue; | |
2105 | } | |
2106 | ||
2107 | if (!tzp || !tzp->tbp) | |
2108 | break; | |
2109 | ||
2110 | for (i = 0; i < tzp->num_tbps; i++) { | |
2111 | if (tzp->tbp[i].cdev == cdev) { | |
2112 | __unbind(tz, tzp->tbp[i].trip_mask, cdev); | |
2113 | tzp->tbp[i].cdev = NULL; | |
2114 | } | |
2115 | } | |
2116 | } | |
2117 | ||
203d3d4a ZR |
2118 | mutex_unlock(&thermal_list_lock); |
2119 | ||
b1569e99 MG |
2120 | thermal_zone_device_set_polling(tz, 0); |
2121 | ||
203d3d4a ZR |
2122 | if (tz->type[0]) |
2123 | device_remove_file(&tz->device, &dev_attr_type); | |
2124 | device_remove_file(&tz->device, &dev_attr_temp); | |
2125 | if (tz->ops->get_mode) | |
2126 | device_remove_file(&tz->device, &dev_attr_mode); | |
5a2c090b | 2127 | device_remove_file(&tz->device, &dev_attr_policy); |
25a0a5ce | 2128 | device_remove_file(&tz->device, &dev_attr_available_policies); |
c56f5c03 | 2129 | remove_trip_attrs(tz); |
e33df1d2 | 2130 | thermal_set_governor(tz, NULL); |
203d3d4a | 2131 | |
e68b16ab | 2132 | thermal_remove_hwmon_sysfs(tz); |
203d3d4a ZR |
2133 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
2134 | idr_destroy(&tz->idr); | |
2135 | mutex_destroy(&tz->lock); | |
2136 | device_unregister(&tz->device); | |
2137 | return; | |
2138 | } | |
910cb1e3 | 2139 | EXPORT_SYMBOL_GPL(thermal_zone_device_unregister); |
203d3d4a | 2140 | |
63c4d919 EV |
2141 | /** |
2142 | * thermal_zone_get_zone_by_name() - search for a zone and returns its ref | |
2143 | * @name: thermal zone name to fetch the temperature | |
2144 | * | |
2145 | * When only one zone is found with the passed name, returns a reference to it. | |
2146 | * | |
2147 | * Return: On success returns a reference to an unique thermal zone with | |
2148 | * matching name equals to @name, an ERR_PTR otherwise (-EINVAL for invalid | |
2149 | * paramenters, -ENODEV for not found and -EEXIST for multiple matches). | |
2150 | */ | |
2151 | struct thermal_zone_device *thermal_zone_get_zone_by_name(const char *name) | |
2152 | { | |
2153 | struct thermal_zone_device *pos = NULL, *ref = ERR_PTR(-EINVAL); | |
2154 | unsigned int found = 0; | |
2155 | ||
2156 | if (!name) | |
2157 | goto exit; | |
2158 | ||
2159 | mutex_lock(&thermal_list_lock); | |
2160 | list_for_each_entry(pos, &thermal_tz_list, node) | |
484ac2f3 | 2161 | if (!strncasecmp(name, pos->type, THERMAL_NAME_LENGTH)) { |
63c4d919 EV |
2162 | found++; |
2163 | ref = pos; | |
2164 | } | |
2165 | mutex_unlock(&thermal_list_lock); | |
2166 | ||
2167 | /* nothing has been found, thus an error code for it */ | |
2168 | if (found == 0) | |
2169 | ref = ERR_PTR(-ENODEV); | |
2170 | else if (found > 1) | |
2171 | /* Success only when an unique zone is found */ | |
2172 | ref = ERR_PTR(-EEXIST); | |
2173 | ||
2174 | exit: | |
2175 | return ref; | |
2176 | } | |
2177 | EXPORT_SYMBOL_GPL(thermal_zone_get_zone_by_name); | |
2178 | ||
af06216a | 2179 | #ifdef CONFIG_NET |
2a94fe48 JB |
2180 | static const struct genl_multicast_group thermal_event_mcgrps[] = { |
2181 | { .name = THERMAL_GENL_MCAST_GROUP_NAME, }, | |
2182 | }; | |
2183 | ||
af06216a RW |
2184 | static struct genl_family thermal_event_genl_family = { |
2185 | .id = GENL_ID_GENERATE, | |
2186 | .name = THERMAL_GENL_FAMILY_NAME, | |
2187 | .version = THERMAL_GENL_VERSION, | |
2188 | .maxattr = THERMAL_GENL_ATTR_MAX, | |
2a94fe48 JB |
2189 | .mcgrps = thermal_event_mcgrps, |
2190 | .n_mcgrps = ARRAY_SIZE(thermal_event_mcgrps), | |
af06216a RW |
2191 | }; |
2192 | ||
8ab3e6a0 EV |
2193 | int thermal_generate_netlink_event(struct thermal_zone_device *tz, |
2194 | enum events event) | |
4cb18728 D |
2195 | { |
2196 | struct sk_buff *skb; | |
2197 | struct nlattr *attr; | |
2198 | struct thermal_genl_event *thermal_event; | |
2199 | void *msg_header; | |
2200 | int size; | |
2201 | int result; | |
b11de07c | 2202 | static unsigned int thermal_event_seqnum; |
4cb18728 | 2203 | |
8ab3e6a0 EV |
2204 | if (!tz) |
2205 | return -EINVAL; | |
2206 | ||
4cb18728 | 2207 | /* allocate memory */ |
886ee546 JP |
2208 | size = nla_total_size(sizeof(struct thermal_genl_event)) + |
2209 | nla_total_size(0); | |
4cb18728 D |
2210 | |
2211 | skb = genlmsg_new(size, GFP_ATOMIC); | |
2212 | if (!skb) | |
2213 | return -ENOMEM; | |
2214 | ||
2215 | /* add the genetlink message header */ | |
2216 | msg_header = genlmsg_put(skb, 0, thermal_event_seqnum++, | |
2217 | &thermal_event_genl_family, 0, | |
2218 | THERMAL_GENL_CMD_EVENT); | |
2219 | if (!msg_header) { | |
2220 | nlmsg_free(skb); | |
2221 | return -ENOMEM; | |
2222 | } | |
2223 | ||
2224 | /* fill the data */ | |
886ee546 JP |
2225 | attr = nla_reserve(skb, THERMAL_GENL_ATTR_EVENT, |
2226 | sizeof(struct thermal_genl_event)); | |
4cb18728 D |
2227 | |
2228 | if (!attr) { | |
2229 | nlmsg_free(skb); | |
2230 | return -EINVAL; | |
2231 | } | |
2232 | ||
2233 | thermal_event = nla_data(attr); | |
2234 | if (!thermal_event) { | |
2235 | nlmsg_free(skb); | |
2236 | return -EINVAL; | |
2237 | } | |
2238 | ||
2239 | memset(thermal_event, 0, sizeof(struct thermal_genl_event)); | |
2240 | ||
8ab3e6a0 | 2241 | thermal_event->orig = tz->id; |
4cb18728 D |
2242 | thermal_event->event = event; |
2243 | ||
2244 | /* send multicast genetlink message */ | |
053c095a | 2245 | genlmsg_end(skb, msg_header); |
4cb18728 | 2246 | |
68eb5503 | 2247 | result = genlmsg_multicast(&thermal_event_genl_family, skb, 0, |
2a94fe48 | 2248 | 0, GFP_ATOMIC); |
4cb18728 | 2249 | if (result) |
923e0b1e | 2250 | dev_err(&tz->device, "Failed to send netlink event:%d", result); |
4cb18728 D |
2251 | |
2252 | return result; | |
2253 | } | |
910cb1e3 | 2254 | EXPORT_SYMBOL_GPL(thermal_generate_netlink_event); |
4cb18728 D |
2255 | |
2256 | static int genetlink_init(void) | |
2257 | { | |
2a94fe48 | 2258 | return genl_register_family(&thermal_event_genl_family); |
4cb18728 D |
2259 | } |
2260 | ||
af06216a RW |
2261 | static void genetlink_exit(void) |
2262 | { | |
2263 | genl_unregister_family(&thermal_event_genl_family); | |
2264 | } | |
2265 | #else /* !CONFIG_NET */ | |
2266 | static inline int genetlink_init(void) { return 0; } | |
2267 | static inline void genetlink_exit(void) {} | |
2268 | #endif /* !CONFIG_NET */ | |
2269 | ||
80a26a5c ZR |
2270 | static int __init thermal_register_governors(void) |
2271 | { | |
2272 | int result; | |
2273 | ||
2274 | result = thermal_gov_step_wise_register(); | |
2275 | if (result) | |
2276 | return result; | |
2277 | ||
2278 | result = thermal_gov_fair_share_register(); | |
2279 | if (result) | |
2280 | return result; | |
2281 | ||
e4dbf98f PF |
2282 | result = thermal_gov_bang_bang_register(); |
2283 | if (result) | |
2284 | return result; | |
2285 | ||
6b775e87 JM |
2286 | result = thermal_gov_user_space_register(); |
2287 | if (result) | |
2288 | return result; | |
2289 | ||
2290 | return thermal_gov_power_allocator_register(); | |
80a26a5c ZR |
2291 | } |
2292 | ||
2293 | static void thermal_unregister_governors(void) | |
2294 | { | |
2295 | thermal_gov_step_wise_unregister(); | |
2296 | thermal_gov_fair_share_unregister(); | |
e4dbf98f | 2297 | thermal_gov_bang_bang_unregister(); |
80a26a5c | 2298 | thermal_gov_user_space_unregister(); |
6b775e87 | 2299 | thermal_gov_power_allocator_unregister(); |
80a26a5c ZR |
2300 | } |
2301 | ||
1cac41cb MB |
2302 | #ifdef CONFIG_SCHED_HMP |
2303 | static int thermal_cpu_callback(struct notifier_block *nfb, | |
2304 | unsigned long action, void *hcpu) | |
2305 | { | |
2306 | unsigned long cpu = (unsigned long)hcpu; | |
2307 | struct thermal_zone_device *pos; | |
2308 | ||
2309 | switch (action) { | |
2310 | case CPU_ONLINE: | |
2311 | if (cpu == BOUNDED_CPU) { | |
2312 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
2313 | pos->poll_queue_cpu = BOUNDED_CPU; | |
2314 | if (pos->polling_delay) { | |
2315 | start_poll_queue(pos, pos->polling_delay); | |
2316 | } | |
2317 | } | |
2318 | } | |
2319 | break; | |
2320 | case CPU_DOWN_PREPARE: | |
2321 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
2322 | if (pos->poll_queue_cpu == cpu) { | |
2323 | pos->poll_queue_cpu = 0; | |
2324 | if (pos->polling_delay) | |
2325 | start_poll_queue(pos, pos->polling_delay); | |
2326 | } | |
2327 | } | |
2328 | break; | |
2329 | } | |
2330 | return NOTIFY_OK; | |
2331 | } | |
2332 | ||
2333 | static struct notifier_block thermal_cpu_notifier = | |
2334 | { | |
2335 | .notifier_call = thermal_cpu_callback, | |
2336 | }; | |
2337 | #endif | |
2338 | ||
a67208e9 ZR |
2339 | static int thermal_pm_notify(struct notifier_block *nb, |
2340 | unsigned long mode, void *_unused) | |
2341 | { | |
2342 | struct thermal_zone_device *tz; | |
2343 | ||
2344 | switch (mode) { | |
2345 | case PM_HIBERNATION_PREPARE: | |
2346 | case PM_RESTORE_PREPARE: | |
2347 | case PM_SUSPEND_PREPARE: | |
2348 | atomic_set(&in_suspend, 1); | |
2349 | break; | |
2350 | case PM_POST_HIBERNATION: | |
2351 | case PM_POST_RESTORE: | |
2352 | case PM_POST_SUSPEND: | |
2353 | atomic_set(&in_suspend, 0); | |
2354 | list_for_each_entry(tz, &thermal_tz_list, node) { | |
2355 | thermal_zone_device_reset(tz); | |
2356 | thermal_zone_device_update(tz); | |
2357 | } | |
2358 | break; | |
2359 | default: | |
2360 | break; | |
2361 | } | |
2362 | return 0; | |
2363 | } | |
2364 | ||
2365 | static struct notifier_block thermal_pm_nb = { | |
2366 | .notifier_call = thermal_pm_notify, | |
2367 | }; | |
2368 | ||
203d3d4a ZR |
2369 | static int __init thermal_init(void) |
2370 | { | |
80a26a5c ZR |
2371 | int result; |
2372 | ||
2373 | result = thermal_register_governors(); | |
2374 | if (result) | |
2375 | goto error; | |
203d3d4a ZR |
2376 | |
2377 | result = class_register(&thermal_class); | |
80a26a5c ZR |
2378 | if (result) |
2379 | goto unregister_governors; | |
2380 | ||
4cb18728 | 2381 | result = genetlink_init(); |
80a26a5c ZR |
2382 | if (result) |
2383 | goto unregister_class; | |
2384 | ||
4e5e4705 EV |
2385 | result = of_parse_thermal_zones(); |
2386 | if (result) | |
2387 | goto exit_netlink; | |
2388 | ||
1cac41cb MB |
2389 | #ifdef CONFIG_SCHED_HMP |
2390 | register_hotcpu_notifier(&thermal_cpu_notifier); | |
2391 | #endif | |
a67208e9 ZR |
2392 | result = register_pm_notifier(&thermal_pm_nb); |
2393 | if (result) | |
2394 | pr_warn("Thermal: Can not register suspend notifier, return %d\n", | |
2395 | result); | |
2396 | ||
80a26a5c ZR |
2397 | return 0; |
2398 | ||
4e5e4705 EV |
2399 | exit_netlink: |
2400 | genetlink_exit(); | |
80a26a5c ZR |
2401 | unregister_class: |
2402 | class_unregister(&thermal_class); | |
9d367e5e LH |
2403 | unregister_governors: |
2404 | thermal_unregister_governors(); | |
80a26a5c ZR |
2405 | error: |
2406 | idr_destroy(&thermal_tz_idr); | |
2407 | idr_destroy(&thermal_cdev_idr); | |
2408 | mutex_destroy(&thermal_idr_lock); | |
2409 | mutex_destroy(&thermal_list_lock); | |
2410 | mutex_destroy(&thermal_governor_lock); | |
203d3d4a ZR |
2411 | return result; |
2412 | } | |
2413 | ||
2414 | static void __exit thermal_exit(void) | |
2415 | { | |
a67208e9 | 2416 | unregister_pm_notifier(&thermal_pm_nb); |
1cac41cb MB |
2417 | #ifdef CONFIG_SCHED_HMP |
2418 | unregister_hotcpu_notifier(&thermal_cpu_notifier); | |
2419 | #endif | |
4e5e4705 | 2420 | of_thermal_destroy_zones(); |
80a26a5c | 2421 | genetlink_exit(); |
203d3d4a | 2422 | class_unregister(&thermal_class); |
80a26a5c | 2423 | thermal_unregister_governors(); |
203d3d4a ZR |
2424 | idr_destroy(&thermal_tz_idr); |
2425 | idr_destroy(&thermal_cdev_idr); | |
2426 | mutex_destroy(&thermal_idr_lock); | |
2427 | mutex_destroy(&thermal_list_lock); | |
80a26a5c | 2428 | mutex_destroy(&thermal_governor_lock); |
203d3d4a ZR |
2429 | } |
2430 | ||
4cb18728 | 2431 | fs_initcall(thermal_init); |
203d3d4a | 2432 | module_exit(thermal_exit); |