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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> | |
35 | #include <linux/spinlock.h> | |
b1569e99 | 36 | #include <linux/reboot.h> |
4cb18728 D |
37 | #include <net/netlink.h> |
38 | #include <net/genetlink.h> | |
203d3d4a | 39 | |
71350db4 D |
40 | #include "thermal_core.h" |
41 | ||
63c4ec90 | 42 | MODULE_AUTHOR("Zhang Rui"); |
203d3d4a ZR |
43 | MODULE_DESCRIPTION("Generic thermal management sysfs support"); |
44 | MODULE_LICENSE("GPL"); | |
45 | ||
203d3d4a ZR |
46 | static DEFINE_IDR(thermal_tz_idr); |
47 | static DEFINE_IDR(thermal_cdev_idr); | |
48 | static DEFINE_MUTEX(thermal_idr_lock); | |
49 | ||
50 | static LIST_HEAD(thermal_tz_list); | |
51 | static LIST_HEAD(thermal_cdev_list); | |
52 | static DEFINE_MUTEX(thermal_list_lock); | |
53 | ||
54 | static int get_idr(struct idr *idr, struct mutex *lock, int *id) | |
55 | { | |
56 | int err; | |
57 | ||
caca8b80 | 58 | again: |
203d3d4a ZR |
59 | if (unlikely(idr_pre_get(idr, GFP_KERNEL) == 0)) |
60 | return -ENOMEM; | |
61 | ||
62 | if (lock) | |
63 | mutex_lock(lock); | |
64 | err = idr_get_new(idr, NULL, id); | |
65 | if (lock) | |
66 | mutex_unlock(lock); | |
67 | if (unlikely(err == -EAGAIN)) | |
68 | goto again; | |
69 | else if (unlikely(err)) | |
70 | return err; | |
71 | ||
125c4c70 | 72 | *id = *id & MAX_IDR_MASK; |
203d3d4a ZR |
73 | return 0; |
74 | } | |
75 | ||
76 | static void release_idr(struct idr *idr, struct mutex *lock, int id) | |
77 | { | |
78 | if (lock) | |
79 | mutex_lock(lock); | |
80 | idr_remove(idr, id); | |
81 | if (lock) | |
82 | mutex_unlock(lock); | |
83 | } | |
84 | ||
85 | /* sys I/F for thermal zone */ | |
86 | ||
87 | #define to_thermal_zone(_dev) \ | |
88 | container_of(_dev, struct thermal_zone_device, device) | |
89 | ||
90 | static ssize_t | |
91 | type_show(struct device *dev, struct device_attribute *attr, char *buf) | |
92 | { | |
93 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
94 | ||
95 | return sprintf(buf, "%s\n", tz->type); | |
96 | } | |
97 | ||
98 | static ssize_t | |
99 | temp_show(struct device *dev, struct device_attribute *attr, char *buf) | |
100 | { | |
101 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
102 | long temperature; |
103 | int ret; | |
203d3d4a ZR |
104 | |
105 | if (!tz->ops->get_temp) | |
106 | return -EPERM; | |
107 | ||
6503e5df MG |
108 | ret = tz->ops->get_temp(tz, &temperature); |
109 | ||
110 | if (ret) | |
111 | return ret; | |
112 | ||
113 | return sprintf(buf, "%ld\n", temperature); | |
203d3d4a ZR |
114 | } |
115 | ||
116 | static ssize_t | |
117 | mode_show(struct device *dev, struct device_attribute *attr, char *buf) | |
118 | { | |
119 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
120 | enum thermal_device_mode mode; |
121 | int result; | |
203d3d4a ZR |
122 | |
123 | if (!tz->ops->get_mode) | |
124 | return -EPERM; | |
125 | ||
6503e5df MG |
126 | result = tz->ops->get_mode(tz, &mode); |
127 | if (result) | |
128 | return result; | |
129 | ||
130 | return sprintf(buf, "%s\n", mode == THERMAL_DEVICE_ENABLED ? "enabled" | |
131 | : "disabled"); | |
203d3d4a ZR |
132 | } |
133 | ||
134 | static ssize_t | |
135 | mode_store(struct device *dev, struct device_attribute *attr, | |
136 | const char *buf, size_t count) | |
137 | { | |
138 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
139 | int result; | |
140 | ||
141 | if (!tz->ops->set_mode) | |
142 | return -EPERM; | |
143 | ||
f1f0e2ac | 144 | if (!strncmp(buf, "enabled", sizeof("enabled") - 1)) |
6503e5df | 145 | result = tz->ops->set_mode(tz, THERMAL_DEVICE_ENABLED); |
f1f0e2ac | 146 | else if (!strncmp(buf, "disabled", sizeof("disabled") - 1)) |
6503e5df MG |
147 | result = tz->ops->set_mode(tz, THERMAL_DEVICE_DISABLED); |
148 | else | |
149 | result = -EINVAL; | |
150 | ||
203d3d4a ZR |
151 | if (result) |
152 | return result; | |
153 | ||
154 | return count; | |
155 | } | |
156 | ||
157 | static ssize_t | |
158 | trip_point_type_show(struct device *dev, struct device_attribute *attr, | |
159 | char *buf) | |
160 | { | |
161 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
162 | enum thermal_trip_type type; |
163 | int trip, result; | |
203d3d4a ZR |
164 | |
165 | if (!tz->ops->get_trip_type) | |
166 | return -EPERM; | |
167 | ||
168 | if (!sscanf(attr->attr.name, "trip_point_%d_type", &trip)) | |
169 | return -EINVAL; | |
170 | ||
6503e5df MG |
171 | result = tz->ops->get_trip_type(tz, trip, &type); |
172 | if (result) | |
173 | return result; | |
174 | ||
175 | switch (type) { | |
176 | case THERMAL_TRIP_CRITICAL: | |
625120a4 | 177 | return sprintf(buf, "critical\n"); |
6503e5df | 178 | case THERMAL_TRIP_HOT: |
625120a4 | 179 | return sprintf(buf, "hot\n"); |
6503e5df | 180 | case THERMAL_TRIP_PASSIVE: |
625120a4 | 181 | return sprintf(buf, "passive\n"); |
6503e5df | 182 | case THERMAL_TRIP_ACTIVE: |
625120a4 | 183 | return sprintf(buf, "active\n"); |
6503e5df | 184 | default: |
625120a4 | 185 | return sprintf(buf, "unknown\n"); |
6503e5df | 186 | } |
203d3d4a ZR |
187 | } |
188 | ||
c56f5c03 D |
189 | static ssize_t |
190 | trip_point_temp_store(struct device *dev, struct device_attribute *attr, | |
191 | const char *buf, size_t count) | |
192 | { | |
193 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
194 | int trip, ret; | |
195 | unsigned long temperature; | |
196 | ||
197 | if (!tz->ops->set_trip_temp) | |
198 | return -EPERM; | |
199 | ||
200 | if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip)) | |
201 | return -EINVAL; | |
202 | ||
203 | if (kstrtoul(buf, 10, &temperature)) | |
204 | return -EINVAL; | |
205 | ||
206 | ret = tz->ops->set_trip_temp(tz, trip, temperature); | |
207 | ||
208 | return ret ? ret : count; | |
209 | } | |
210 | ||
203d3d4a ZR |
211 | static ssize_t |
212 | trip_point_temp_show(struct device *dev, struct device_attribute *attr, | |
213 | char *buf) | |
214 | { | |
215 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
216 | int trip, ret; |
217 | long temperature; | |
203d3d4a ZR |
218 | |
219 | if (!tz->ops->get_trip_temp) | |
220 | return -EPERM; | |
221 | ||
222 | if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip)) | |
223 | return -EINVAL; | |
224 | ||
6503e5df MG |
225 | ret = tz->ops->get_trip_temp(tz, trip, &temperature); |
226 | ||
227 | if (ret) | |
228 | return ret; | |
229 | ||
230 | return sprintf(buf, "%ld\n", temperature); | |
203d3d4a ZR |
231 | } |
232 | ||
27365a6c D |
233 | static ssize_t |
234 | trip_point_hyst_store(struct device *dev, struct device_attribute *attr, | |
235 | const char *buf, size_t count) | |
236 | { | |
237 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
238 | int trip, ret; | |
239 | unsigned long temperature; | |
240 | ||
241 | if (!tz->ops->set_trip_hyst) | |
242 | return -EPERM; | |
243 | ||
244 | if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip)) | |
245 | return -EINVAL; | |
246 | ||
247 | if (kstrtoul(buf, 10, &temperature)) | |
248 | return -EINVAL; | |
249 | ||
250 | /* | |
251 | * We are not doing any check on the 'temperature' value | |
252 | * here. The driver implementing 'set_trip_hyst' has to | |
253 | * take care of this. | |
254 | */ | |
255 | ret = tz->ops->set_trip_hyst(tz, trip, temperature); | |
256 | ||
257 | return ret ? ret : count; | |
258 | } | |
259 | ||
260 | static ssize_t | |
261 | trip_point_hyst_show(struct device *dev, struct device_attribute *attr, | |
262 | char *buf) | |
263 | { | |
264 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
265 | int trip, ret; | |
266 | unsigned long temperature; | |
267 | ||
268 | if (!tz->ops->get_trip_hyst) | |
269 | return -EPERM; | |
270 | ||
271 | if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip)) | |
272 | return -EINVAL; | |
273 | ||
274 | ret = tz->ops->get_trip_hyst(tz, trip, &temperature); | |
275 | ||
276 | return ret ? ret : sprintf(buf, "%ld\n", temperature); | |
277 | } | |
278 | ||
03a971a2 MG |
279 | static ssize_t |
280 | passive_store(struct device *dev, struct device_attribute *attr, | |
281 | const char *buf, size_t count) | |
282 | { | |
283 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
284 | struct thermal_cooling_device *cdev = NULL; | |
285 | int state; | |
286 | ||
287 | if (!sscanf(buf, "%d\n", &state)) | |
288 | return -EINVAL; | |
289 | ||
3d8e3ad8 FP |
290 | /* sanity check: values below 1000 millicelcius don't make sense |
291 | * and can cause the system to go into a thermal heart attack | |
292 | */ | |
293 | if (state && state < 1000) | |
294 | return -EINVAL; | |
295 | ||
03a971a2 MG |
296 | if (state && !tz->forced_passive) { |
297 | mutex_lock(&thermal_list_lock); | |
298 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
299 | if (!strncmp("Processor", cdev->type, | |
300 | sizeof("Processor"))) | |
301 | thermal_zone_bind_cooling_device(tz, | |
9d99842f ZR |
302 | THERMAL_TRIPS_NONE, cdev, |
303 | THERMAL_NO_LIMIT, | |
304 | THERMAL_NO_LIMIT); | |
03a971a2 MG |
305 | } |
306 | mutex_unlock(&thermal_list_lock); | |
e4143b03 FP |
307 | if (!tz->passive_delay) |
308 | tz->passive_delay = 1000; | |
03a971a2 MG |
309 | } else if (!state && tz->forced_passive) { |
310 | mutex_lock(&thermal_list_lock); | |
311 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
312 | if (!strncmp("Processor", cdev->type, | |
313 | sizeof("Processor"))) | |
314 | thermal_zone_unbind_cooling_device(tz, | |
315 | THERMAL_TRIPS_NONE, | |
316 | cdev); | |
317 | } | |
318 | mutex_unlock(&thermal_list_lock); | |
e4143b03 | 319 | tz->passive_delay = 0; |
03a971a2 MG |
320 | } |
321 | ||
03a971a2 MG |
322 | tz->forced_passive = state; |
323 | ||
324 | thermal_zone_device_update(tz); | |
325 | ||
326 | return count; | |
327 | } | |
328 | ||
329 | static ssize_t | |
330 | passive_show(struct device *dev, struct device_attribute *attr, | |
331 | char *buf) | |
332 | { | |
333 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
334 | ||
335 | return sprintf(buf, "%d\n", tz->forced_passive); | |
336 | } | |
337 | ||
203d3d4a ZR |
338 | static DEVICE_ATTR(type, 0444, type_show, NULL); |
339 | static DEVICE_ATTR(temp, 0444, temp_show, NULL); | |
340 | static DEVICE_ATTR(mode, 0644, mode_show, mode_store); | |
886ee546 | 341 | static DEVICE_ATTR(passive, S_IRUGO | S_IWUSR, passive_show, passive_store); |
203d3d4a | 342 | |
203d3d4a ZR |
343 | /* sys I/F for cooling device */ |
344 | #define to_cooling_device(_dev) \ | |
345 | container_of(_dev, struct thermal_cooling_device, device) | |
346 | ||
347 | static ssize_t | |
348 | thermal_cooling_device_type_show(struct device *dev, | |
349 | struct device_attribute *attr, char *buf) | |
350 | { | |
351 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
352 | ||
353 | return sprintf(buf, "%s\n", cdev->type); | |
354 | } | |
355 | ||
356 | static ssize_t | |
357 | thermal_cooling_device_max_state_show(struct device *dev, | |
358 | struct device_attribute *attr, char *buf) | |
359 | { | |
360 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df MG |
361 | unsigned long state; |
362 | int ret; | |
203d3d4a | 363 | |
6503e5df MG |
364 | ret = cdev->ops->get_max_state(cdev, &state); |
365 | if (ret) | |
366 | return ret; | |
367 | return sprintf(buf, "%ld\n", state); | |
203d3d4a ZR |
368 | } |
369 | ||
370 | static ssize_t | |
371 | thermal_cooling_device_cur_state_show(struct device *dev, | |
372 | struct device_attribute *attr, char *buf) | |
373 | { | |
374 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df MG |
375 | unsigned long state; |
376 | int ret; | |
203d3d4a | 377 | |
6503e5df MG |
378 | ret = cdev->ops->get_cur_state(cdev, &state); |
379 | if (ret) | |
380 | return ret; | |
381 | return sprintf(buf, "%ld\n", state); | |
203d3d4a ZR |
382 | } |
383 | ||
384 | static ssize_t | |
385 | thermal_cooling_device_cur_state_store(struct device *dev, | |
386 | struct device_attribute *attr, | |
387 | const char *buf, size_t count) | |
388 | { | |
389 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df | 390 | unsigned long state; |
203d3d4a ZR |
391 | int result; |
392 | ||
6503e5df | 393 | if (!sscanf(buf, "%ld\n", &state)) |
203d3d4a ZR |
394 | return -EINVAL; |
395 | ||
edb94918 | 396 | if ((long)state < 0) |
203d3d4a ZR |
397 | return -EINVAL; |
398 | ||
399 | result = cdev->ops->set_cur_state(cdev, state); | |
400 | if (result) | |
401 | return result; | |
402 | return count; | |
403 | } | |
404 | ||
405 | static struct device_attribute dev_attr_cdev_type = | |
543a9561 | 406 | __ATTR(type, 0444, thermal_cooling_device_type_show, NULL); |
203d3d4a ZR |
407 | static DEVICE_ATTR(max_state, 0444, |
408 | thermal_cooling_device_max_state_show, NULL); | |
409 | static DEVICE_ATTR(cur_state, 0644, | |
410 | thermal_cooling_device_cur_state_show, | |
411 | thermal_cooling_device_cur_state_store); | |
412 | ||
413 | static ssize_t | |
414 | thermal_cooling_device_trip_point_show(struct device *dev, | |
543a9561 | 415 | struct device_attribute *attr, char *buf) |
203d3d4a | 416 | { |
b81b6ba3 | 417 | struct thermal_instance *instance; |
203d3d4a ZR |
418 | |
419 | instance = | |
b81b6ba3 | 420 | container_of(attr, struct thermal_instance, attr); |
203d3d4a ZR |
421 | |
422 | if (instance->trip == THERMAL_TRIPS_NONE) | |
423 | return sprintf(buf, "-1\n"); | |
424 | else | |
425 | return sprintf(buf, "%d\n", instance->trip); | |
426 | } | |
427 | ||
428 | /* Device management */ | |
429 | ||
16d75239 RH |
430 | #if defined(CONFIG_THERMAL_HWMON) |
431 | ||
e68b16ab ZR |
432 | /* hwmon sys I/F */ |
433 | #include <linux/hwmon.h> | |
31f5396a JD |
434 | |
435 | /* thermal zone devices with the same type share one hwmon device */ | |
436 | struct thermal_hwmon_device { | |
437 | char type[THERMAL_NAME_LENGTH]; | |
438 | struct device *device; | |
439 | int count; | |
440 | struct list_head tz_list; | |
441 | struct list_head node; | |
442 | }; | |
443 | ||
444 | struct thermal_hwmon_attr { | |
445 | struct device_attribute attr; | |
446 | char name[16]; | |
447 | }; | |
448 | ||
449 | /* one temperature input for each thermal zone */ | |
450 | struct thermal_hwmon_temp { | |
451 | struct list_head hwmon_node; | |
452 | struct thermal_zone_device *tz; | |
453 | struct thermal_hwmon_attr temp_input; /* hwmon sys attr */ | |
454 | struct thermal_hwmon_attr temp_crit; /* hwmon sys attr */ | |
455 | }; | |
456 | ||
e68b16ab ZR |
457 | static LIST_HEAD(thermal_hwmon_list); |
458 | ||
459 | static ssize_t | |
460 | name_show(struct device *dev, struct device_attribute *attr, char *buf) | |
461 | { | |
0e968a3b | 462 | struct thermal_hwmon_device *hwmon = dev_get_drvdata(dev); |
e68b16ab ZR |
463 | return sprintf(buf, "%s\n", hwmon->type); |
464 | } | |
465 | static DEVICE_ATTR(name, 0444, name_show, NULL); | |
466 | ||
467 | static ssize_t | |
468 | temp_input_show(struct device *dev, struct device_attribute *attr, char *buf) | |
469 | { | |
6503e5df MG |
470 | long temperature; |
471 | int ret; | |
e68b16ab ZR |
472 | struct thermal_hwmon_attr *hwmon_attr |
473 | = container_of(attr, struct thermal_hwmon_attr, attr); | |
31f5396a JD |
474 | struct thermal_hwmon_temp *temp |
475 | = container_of(hwmon_attr, struct thermal_hwmon_temp, | |
e68b16ab | 476 | temp_input); |
31f5396a | 477 | struct thermal_zone_device *tz = temp->tz; |
e68b16ab | 478 | |
6503e5df MG |
479 | ret = tz->ops->get_temp(tz, &temperature); |
480 | ||
481 | if (ret) | |
482 | return ret; | |
483 | ||
484 | return sprintf(buf, "%ld\n", temperature); | |
e68b16ab ZR |
485 | } |
486 | ||
487 | static ssize_t | |
488 | temp_crit_show(struct device *dev, struct device_attribute *attr, | |
489 | char *buf) | |
490 | { | |
491 | struct thermal_hwmon_attr *hwmon_attr | |
492 | = container_of(attr, struct thermal_hwmon_attr, attr); | |
31f5396a JD |
493 | struct thermal_hwmon_temp *temp |
494 | = container_of(hwmon_attr, struct thermal_hwmon_temp, | |
e68b16ab | 495 | temp_crit); |
31f5396a | 496 | struct thermal_zone_device *tz = temp->tz; |
6503e5df MG |
497 | long temperature; |
498 | int ret; | |
499 | ||
500 | ret = tz->ops->get_trip_temp(tz, 0, &temperature); | |
501 | if (ret) | |
502 | return ret; | |
e68b16ab | 503 | |
6503e5df | 504 | return sprintf(buf, "%ld\n", temperature); |
e68b16ab ZR |
505 | } |
506 | ||
507 | ||
0d97d7a4 JD |
508 | static struct thermal_hwmon_device * |
509 | thermal_hwmon_lookup_by_type(const struct thermal_zone_device *tz) | |
e68b16ab ZR |
510 | { |
511 | struct thermal_hwmon_device *hwmon; | |
e68b16ab ZR |
512 | |
513 | mutex_lock(&thermal_list_lock); | |
514 | list_for_each_entry(hwmon, &thermal_hwmon_list, node) | |
515 | if (!strcmp(hwmon->type, tz->type)) { | |
e68b16ab | 516 | mutex_unlock(&thermal_list_lock); |
0d97d7a4 | 517 | return hwmon; |
e68b16ab ZR |
518 | } |
519 | mutex_unlock(&thermal_list_lock); | |
520 | ||
0d97d7a4 JD |
521 | return NULL; |
522 | } | |
523 | ||
31f5396a JD |
524 | /* Find the temperature input matching a given thermal zone */ |
525 | static struct thermal_hwmon_temp * | |
526 | thermal_hwmon_lookup_temp(const struct thermal_hwmon_device *hwmon, | |
527 | const struct thermal_zone_device *tz) | |
528 | { | |
529 | struct thermal_hwmon_temp *temp; | |
530 | ||
531 | mutex_lock(&thermal_list_lock); | |
532 | list_for_each_entry(temp, &hwmon->tz_list, hwmon_node) | |
533 | if (temp->tz == tz) { | |
534 | mutex_unlock(&thermal_list_lock); | |
535 | return temp; | |
536 | } | |
537 | mutex_unlock(&thermal_list_lock); | |
538 | ||
539 | return NULL; | |
540 | } | |
541 | ||
0d97d7a4 JD |
542 | static int |
543 | thermal_add_hwmon_sysfs(struct thermal_zone_device *tz) | |
544 | { | |
545 | struct thermal_hwmon_device *hwmon; | |
31f5396a | 546 | struct thermal_hwmon_temp *temp; |
0d97d7a4 JD |
547 | int new_hwmon_device = 1; |
548 | int result; | |
549 | ||
550 | hwmon = thermal_hwmon_lookup_by_type(tz); | |
551 | if (hwmon) { | |
552 | new_hwmon_device = 0; | |
553 | goto register_sys_interface; | |
554 | } | |
555 | ||
e68b16ab ZR |
556 | hwmon = kzalloc(sizeof(struct thermal_hwmon_device), GFP_KERNEL); |
557 | if (!hwmon) | |
558 | return -ENOMEM; | |
559 | ||
560 | INIT_LIST_HEAD(&hwmon->tz_list); | |
561 | strlcpy(hwmon->type, tz->type, THERMAL_NAME_LENGTH); | |
562 | hwmon->device = hwmon_device_register(NULL); | |
563 | if (IS_ERR(hwmon->device)) { | |
564 | result = PTR_ERR(hwmon->device); | |
565 | goto free_mem; | |
566 | } | |
0e968a3b | 567 | dev_set_drvdata(hwmon->device, hwmon); |
e68b16ab ZR |
568 | result = device_create_file(hwmon->device, &dev_attr_name); |
569 | if (result) | |
b299eb5c | 570 | goto free_mem; |
e68b16ab ZR |
571 | |
572 | register_sys_interface: | |
31f5396a JD |
573 | temp = kzalloc(sizeof(struct thermal_hwmon_temp), GFP_KERNEL); |
574 | if (!temp) { | |
575 | result = -ENOMEM; | |
576 | goto unregister_name; | |
577 | } | |
578 | ||
579 | temp->tz = tz; | |
e68b16ab ZR |
580 | hwmon->count++; |
581 | ||
79a49168 | 582 | snprintf(temp->temp_input.name, sizeof(temp->temp_input.name), |
e68b16ab | 583 | "temp%d_input", hwmon->count); |
31f5396a JD |
584 | temp->temp_input.attr.attr.name = temp->temp_input.name; |
585 | temp->temp_input.attr.attr.mode = 0444; | |
586 | temp->temp_input.attr.show = temp_input_show; | |
587 | sysfs_attr_init(&temp->temp_input.attr.attr); | |
588 | result = device_create_file(hwmon->device, &temp->temp_input.attr); | |
e68b16ab | 589 | if (result) |
31f5396a | 590 | goto free_temp_mem; |
e68b16ab ZR |
591 | |
592 | if (tz->ops->get_crit_temp) { | |
593 | unsigned long temperature; | |
594 | if (!tz->ops->get_crit_temp(tz, &temperature)) { | |
79a49168 GR |
595 | snprintf(temp->temp_crit.name, |
596 | sizeof(temp->temp_crit.name), | |
e68b16ab | 597 | "temp%d_crit", hwmon->count); |
31f5396a JD |
598 | temp->temp_crit.attr.attr.name = temp->temp_crit.name; |
599 | temp->temp_crit.attr.attr.mode = 0444; | |
600 | temp->temp_crit.attr.show = temp_crit_show; | |
601 | sysfs_attr_init(&temp->temp_crit.attr.attr); | |
e68b16ab | 602 | result = device_create_file(hwmon->device, |
31f5396a | 603 | &temp->temp_crit.attr); |
e68b16ab | 604 | if (result) |
b299eb5c | 605 | goto unregister_input; |
e68b16ab ZR |
606 | } |
607 | } | |
608 | ||
609 | mutex_lock(&thermal_list_lock); | |
610 | if (new_hwmon_device) | |
611 | list_add_tail(&hwmon->node, &thermal_hwmon_list); | |
31f5396a | 612 | list_add_tail(&temp->hwmon_node, &hwmon->tz_list); |
e68b16ab ZR |
613 | mutex_unlock(&thermal_list_lock); |
614 | ||
615 | return 0; | |
616 | ||
b299eb5c | 617 | unregister_input: |
31f5396a JD |
618 | device_remove_file(hwmon->device, &temp->temp_input.attr); |
619 | free_temp_mem: | |
620 | kfree(temp); | |
b299eb5c | 621 | unregister_name: |
e68b16ab ZR |
622 | if (new_hwmon_device) { |
623 | device_remove_file(hwmon->device, &dev_attr_name); | |
624 | hwmon_device_unregister(hwmon->device); | |
625 | } | |
626 | free_mem: | |
627 | if (new_hwmon_device) | |
628 | kfree(hwmon); | |
629 | ||
630 | return result; | |
631 | } | |
632 | ||
633 | static void | |
634 | thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz) | |
635 | { | |
31f5396a JD |
636 | struct thermal_hwmon_device *hwmon; |
637 | struct thermal_hwmon_temp *temp; | |
638 | ||
639 | hwmon = thermal_hwmon_lookup_by_type(tz); | |
640 | if (unlikely(!hwmon)) { | |
641 | /* Should never happen... */ | |
642 | dev_dbg(&tz->device, "hwmon device lookup failed!\n"); | |
643 | return; | |
644 | } | |
645 | ||
646 | temp = thermal_hwmon_lookup_temp(hwmon, tz); | |
647 | if (unlikely(!temp)) { | |
648 | /* Should never happen... */ | |
649 | dev_dbg(&tz->device, "temperature input lookup failed!\n"); | |
650 | return; | |
651 | } | |
e68b16ab | 652 | |
31f5396a | 653 | device_remove_file(hwmon->device, &temp->temp_input.attr); |
b299eb5c | 654 | if (tz->ops->get_crit_temp) |
31f5396a | 655 | device_remove_file(hwmon->device, &temp->temp_crit.attr); |
e68b16ab ZR |
656 | |
657 | mutex_lock(&thermal_list_lock); | |
31f5396a JD |
658 | list_del(&temp->hwmon_node); |
659 | kfree(temp); | |
e68b16ab ZR |
660 | if (!list_empty(&hwmon->tz_list)) { |
661 | mutex_unlock(&thermal_list_lock); | |
662 | return; | |
663 | } | |
664 | list_del(&hwmon->node); | |
665 | mutex_unlock(&thermal_list_lock); | |
666 | ||
667 | device_remove_file(hwmon->device, &dev_attr_name); | |
668 | hwmon_device_unregister(hwmon->device); | |
669 | kfree(hwmon); | |
670 | } | |
671 | #else | |
672 | static int | |
673 | thermal_add_hwmon_sysfs(struct thermal_zone_device *tz) | |
674 | { | |
675 | return 0; | |
676 | } | |
677 | ||
678 | static void | |
679 | thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz) | |
680 | { | |
681 | } | |
682 | #endif | |
683 | ||
b1569e99 MG |
684 | static void thermal_zone_device_set_polling(struct thermal_zone_device *tz, |
685 | int delay) | |
686 | { | |
b1569e99 | 687 | if (delay > 1000) |
41f63c53 TH |
688 | mod_delayed_work(system_freezable_wq, &tz->poll_queue, |
689 | round_jiffies(msecs_to_jiffies(delay))); | |
690 | else if (delay) | |
691 | mod_delayed_work(system_freezable_wq, &tz->poll_queue, | |
692 | msecs_to_jiffies(delay)); | |
b1569e99 | 693 | else |
41f63c53 | 694 | cancel_delayed_work(&tz->poll_queue); |
b1569e99 MG |
695 | } |
696 | ||
b1569e99 MG |
697 | static void thermal_zone_device_check(struct work_struct *work) |
698 | { | |
699 | struct thermal_zone_device *tz = container_of(work, struct | |
700 | thermal_zone_device, | |
701 | poll_queue.work); | |
702 | thermal_zone_device_update(tz); | |
703 | } | |
e68b16ab | 704 | |
203d3d4a ZR |
705 | /** |
706 | * thermal_zone_bind_cooling_device - bind a cooling device to a thermal zone | |
203d3d4a ZR |
707 | * @tz: thermal zone device |
708 | * @trip: indicates which trip point the cooling devices is | |
709 | * associated with in this thermal zone. | |
710 | * @cdev: thermal cooling device | |
543a9561 LB |
711 | * |
712 | * This function is usually called in the thermal zone device .bind callback. | |
203d3d4a ZR |
713 | */ |
714 | int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, | |
715 | int trip, | |
9d99842f ZR |
716 | struct thermal_cooling_device *cdev, |
717 | unsigned long upper, unsigned long lower) | |
203d3d4a | 718 | { |
b81b6ba3 ZR |
719 | struct thermal_instance *dev; |
720 | struct thermal_instance *pos; | |
c7516709 TS |
721 | struct thermal_zone_device *pos1; |
722 | struct thermal_cooling_device *pos2; | |
74051ba5 | 723 | unsigned long max_state; |
203d3d4a ZR |
724 | int result; |
725 | ||
543a9561 | 726 | if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE)) |
203d3d4a ZR |
727 | return -EINVAL; |
728 | ||
c7516709 TS |
729 | list_for_each_entry(pos1, &thermal_tz_list, node) { |
730 | if (pos1 == tz) | |
731 | break; | |
732 | } | |
733 | list_for_each_entry(pos2, &thermal_cdev_list, node) { | |
734 | if (pos2 == cdev) | |
735 | break; | |
736 | } | |
737 | ||
738 | if (tz != pos1 || cdev != pos2) | |
203d3d4a ZR |
739 | return -EINVAL; |
740 | ||
9d99842f ZR |
741 | cdev->ops->get_max_state(cdev, &max_state); |
742 | ||
743 | /* lower default 0, upper default max_state */ | |
744 | lower = lower == THERMAL_NO_LIMIT ? 0 : lower; | |
745 | upper = upper == THERMAL_NO_LIMIT ? max_state : upper; | |
746 | ||
747 | if (lower > upper || upper > max_state) | |
748 | return -EINVAL; | |
749 | ||
203d3d4a | 750 | dev = |
b81b6ba3 | 751 | kzalloc(sizeof(struct thermal_instance), GFP_KERNEL); |
203d3d4a ZR |
752 | if (!dev) |
753 | return -ENOMEM; | |
754 | dev->tz = tz; | |
755 | dev->cdev = cdev; | |
756 | dev->trip = trip; | |
9d99842f ZR |
757 | dev->upper = upper; |
758 | dev->lower = lower; | |
ce119f83 | 759 | dev->target = THERMAL_NO_TARGET; |
74051ba5 | 760 | |
203d3d4a ZR |
761 | result = get_idr(&tz->idr, &tz->lock, &dev->id); |
762 | if (result) | |
763 | goto free_mem; | |
764 | ||
765 | sprintf(dev->name, "cdev%d", dev->id); | |
766 | result = | |
767 | sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev->name); | |
768 | if (result) | |
769 | goto release_idr; | |
770 | ||
771 | sprintf(dev->attr_name, "cdev%d_trip_point", dev->id); | |
975f8c56 | 772 | sysfs_attr_init(&dev->attr.attr); |
203d3d4a ZR |
773 | dev->attr.attr.name = dev->attr_name; |
774 | dev->attr.attr.mode = 0444; | |
775 | dev->attr.show = thermal_cooling_device_trip_point_show; | |
776 | result = device_create_file(&tz->device, &dev->attr); | |
777 | if (result) | |
778 | goto remove_symbol_link; | |
779 | ||
780 | mutex_lock(&tz->lock); | |
f4a821ce | 781 | mutex_lock(&cdev->lock); |
cddf31b3 | 782 | list_for_each_entry(pos, &tz->thermal_instances, tz_node) |
203d3d4a ZR |
783 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
784 | result = -EEXIST; | |
785 | break; | |
786 | } | |
b5e4ae62 | 787 | if (!result) { |
cddf31b3 | 788 | list_add_tail(&dev->tz_node, &tz->thermal_instances); |
b5e4ae62 ZR |
789 | list_add_tail(&dev->cdev_node, &cdev->thermal_instances); |
790 | } | |
f4a821ce | 791 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
792 | mutex_unlock(&tz->lock); |
793 | ||
794 | if (!result) | |
795 | return 0; | |
796 | ||
797 | device_remove_file(&tz->device, &dev->attr); | |
caca8b80 | 798 | remove_symbol_link: |
203d3d4a | 799 | sysfs_remove_link(&tz->device.kobj, dev->name); |
caca8b80 | 800 | release_idr: |
203d3d4a | 801 | release_idr(&tz->idr, &tz->lock, dev->id); |
caca8b80 | 802 | free_mem: |
203d3d4a ZR |
803 | kfree(dev); |
804 | return result; | |
805 | } | |
806 | EXPORT_SYMBOL(thermal_zone_bind_cooling_device); | |
807 | ||
808 | /** | |
809 | * thermal_zone_unbind_cooling_device - unbind a cooling device from a thermal zone | |
203d3d4a ZR |
810 | * @tz: thermal zone device |
811 | * @trip: indicates which trip point the cooling devices is | |
812 | * associated with in this thermal zone. | |
813 | * @cdev: thermal cooling device | |
543a9561 LB |
814 | * |
815 | * This function is usually called in the thermal zone device .unbind callback. | |
203d3d4a ZR |
816 | */ |
817 | int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz, | |
818 | int trip, | |
819 | struct thermal_cooling_device *cdev) | |
820 | { | |
b81b6ba3 | 821 | struct thermal_instance *pos, *next; |
203d3d4a ZR |
822 | |
823 | mutex_lock(&tz->lock); | |
f4a821ce | 824 | mutex_lock(&cdev->lock); |
cddf31b3 | 825 | list_for_each_entry_safe(pos, next, &tz->thermal_instances, tz_node) { |
543a9561 | 826 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
cddf31b3 | 827 | list_del(&pos->tz_node); |
b5e4ae62 | 828 | list_del(&pos->cdev_node); |
f4a821ce | 829 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
830 | mutex_unlock(&tz->lock); |
831 | goto unbind; | |
832 | } | |
833 | } | |
f4a821ce | 834 | mutex_unlock(&cdev->lock); |
203d3d4a ZR |
835 | mutex_unlock(&tz->lock); |
836 | ||
837 | return -ENODEV; | |
838 | ||
caca8b80 | 839 | unbind: |
203d3d4a ZR |
840 | device_remove_file(&tz->device, &pos->attr); |
841 | sysfs_remove_link(&tz->device.kobj, pos->name); | |
842 | release_idr(&tz->idr, &tz->lock, pos->id); | |
843 | kfree(pos); | |
844 | return 0; | |
845 | } | |
846 | EXPORT_SYMBOL(thermal_zone_unbind_cooling_device); | |
847 | ||
848 | static void thermal_release(struct device *dev) | |
849 | { | |
850 | struct thermal_zone_device *tz; | |
851 | struct thermal_cooling_device *cdev; | |
852 | ||
caca8b80 JP |
853 | if (!strncmp(dev_name(dev), "thermal_zone", |
854 | sizeof("thermal_zone") - 1)) { | |
203d3d4a ZR |
855 | tz = to_thermal_zone(dev); |
856 | kfree(tz); | |
857 | } else { | |
858 | cdev = to_cooling_device(dev); | |
859 | kfree(cdev); | |
860 | } | |
861 | } | |
862 | ||
863 | static struct class thermal_class = { | |
864 | .name = "thermal", | |
865 | .dev_release = thermal_release, | |
866 | }; | |
867 | ||
868 | /** | |
869 | * thermal_cooling_device_register - register a new thermal cooling device | |
870 | * @type: the thermal cooling device type. | |
871 | * @devdata: device private data. | |
872 | * @ops: standard thermal cooling devices callbacks. | |
873 | */ | |
caca8b80 JP |
874 | struct thermal_cooling_device * |
875 | thermal_cooling_device_register(char *type, void *devdata, | |
876 | const struct thermal_cooling_device_ops *ops) | |
203d3d4a ZR |
877 | { |
878 | struct thermal_cooling_device *cdev; | |
879 | struct thermal_zone_device *pos; | |
880 | int result; | |
881 | ||
204dd1d3 | 882 | if (type && strlen(type) >= THERMAL_NAME_LENGTH) |
3e6fda5c | 883 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
884 | |
885 | if (!ops || !ops->get_max_state || !ops->get_cur_state || | |
543a9561 | 886 | !ops->set_cur_state) |
3e6fda5c | 887 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
888 | |
889 | cdev = kzalloc(sizeof(struct thermal_cooling_device), GFP_KERNEL); | |
890 | if (!cdev) | |
3e6fda5c | 891 | return ERR_PTR(-ENOMEM); |
203d3d4a ZR |
892 | |
893 | result = get_idr(&thermal_cdev_idr, &thermal_idr_lock, &cdev->id); | |
894 | if (result) { | |
895 | kfree(cdev); | |
3e6fda5c | 896 | return ERR_PTR(result); |
203d3d4a ZR |
897 | } |
898 | ||
204dd1d3 | 899 | strcpy(cdev->type, type ? : ""); |
f4a821ce | 900 | mutex_init(&cdev->lock); |
b5e4ae62 | 901 | INIT_LIST_HEAD(&cdev->thermal_instances); |
203d3d4a | 902 | cdev->ops = ops; |
ce119f83 | 903 | cdev->updated = true; |
203d3d4a ZR |
904 | cdev->device.class = &thermal_class; |
905 | cdev->devdata = devdata; | |
354655ea | 906 | dev_set_name(&cdev->device, "cooling_device%d", cdev->id); |
203d3d4a ZR |
907 | result = device_register(&cdev->device); |
908 | if (result) { | |
909 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
910 | kfree(cdev); | |
3e6fda5c | 911 | return ERR_PTR(result); |
203d3d4a ZR |
912 | } |
913 | ||
914 | /* sys I/F */ | |
915 | if (type) { | |
543a9561 | 916 | result = device_create_file(&cdev->device, &dev_attr_cdev_type); |
203d3d4a ZR |
917 | if (result) |
918 | goto unregister; | |
919 | } | |
920 | ||
921 | result = device_create_file(&cdev->device, &dev_attr_max_state); | |
922 | if (result) | |
923 | goto unregister; | |
924 | ||
925 | result = device_create_file(&cdev->device, &dev_attr_cur_state); | |
926 | if (result) | |
927 | goto unregister; | |
928 | ||
929 | mutex_lock(&thermal_list_lock); | |
930 | list_add(&cdev->node, &thermal_cdev_list); | |
931 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
932 | if (!pos->ops->bind) | |
933 | continue; | |
934 | result = pos->ops->bind(pos, cdev); | |
935 | if (result) | |
936 | break; | |
937 | ||
938 | } | |
939 | mutex_unlock(&thermal_list_lock); | |
940 | ||
941 | if (!result) | |
942 | return cdev; | |
943 | ||
caca8b80 | 944 | unregister: |
203d3d4a ZR |
945 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); |
946 | device_unregister(&cdev->device); | |
3e6fda5c | 947 | return ERR_PTR(result); |
203d3d4a ZR |
948 | } |
949 | EXPORT_SYMBOL(thermal_cooling_device_register); | |
950 | ||
951 | /** | |
952 | * thermal_cooling_device_unregister - removes the registered thermal cooling device | |
203d3d4a ZR |
953 | * @cdev: the thermal cooling device to remove. |
954 | * | |
955 | * thermal_cooling_device_unregister() must be called when the device is no | |
956 | * longer needed. | |
957 | */ | |
958 | void thermal_cooling_device_unregister(struct | |
959 | thermal_cooling_device | |
960 | *cdev) | |
961 | { | |
962 | struct thermal_zone_device *tz; | |
963 | struct thermal_cooling_device *pos = NULL; | |
964 | ||
965 | if (!cdev) | |
966 | return; | |
967 | ||
968 | mutex_lock(&thermal_list_lock); | |
969 | list_for_each_entry(pos, &thermal_cdev_list, node) | |
970 | if (pos == cdev) | |
971 | break; | |
972 | if (pos != cdev) { | |
973 | /* thermal cooling device not found */ | |
974 | mutex_unlock(&thermal_list_lock); | |
975 | return; | |
976 | } | |
977 | list_del(&cdev->node); | |
978 | list_for_each_entry(tz, &thermal_tz_list, node) { | |
979 | if (!tz->ops->unbind) | |
980 | continue; | |
981 | tz->ops->unbind(tz, cdev); | |
982 | } | |
983 | mutex_unlock(&thermal_list_lock); | |
984 | if (cdev->type[0]) | |
543a9561 | 985 | device_remove_file(&cdev->device, &dev_attr_cdev_type); |
203d3d4a ZR |
986 | device_remove_file(&cdev->device, &dev_attr_max_state); |
987 | device_remove_file(&cdev->device, &dev_attr_cur_state); | |
988 | ||
989 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
990 | device_unregister(&cdev->device); | |
991 | return; | |
992 | } | |
993 | EXPORT_SYMBOL(thermal_cooling_device_unregister); | |
994 | ||
ce119f83 ZR |
995 | static void thermal_cdev_do_update(struct thermal_cooling_device *cdev) |
996 | { | |
997 | struct thermal_instance *instance; | |
998 | unsigned long target = 0; | |
999 | ||
1000 | /* cooling device is updated*/ | |
1001 | if (cdev->updated) | |
1002 | return; | |
1003 | ||
f4a821ce | 1004 | mutex_lock(&cdev->lock); |
ce119f83 ZR |
1005 | /* Make sure cdev enters the deepest cooling state */ |
1006 | list_for_each_entry(instance, &cdev->thermal_instances, cdev_node) { | |
1007 | if (instance->target == THERMAL_NO_TARGET) | |
1008 | continue; | |
1009 | if (instance->target > target) | |
1010 | target = instance->target; | |
1011 | } | |
f4a821ce | 1012 | mutex_unlock(&cdev->lock); |
ce119f83 ZR |
1013 | cdev->ops->set_cur_state(cdev, target); |
1014 | cdev->updated = true; | |
1015 | } | |
1016 | ||
1017 | static void thermal_zone_do_update(struct thermal_zone_device *tz) | |
1018 | { | |
1019 | struct thermal_instance *instance; | |
1020 | ||
1021 | list_for_each_entry(instance, &tz->thermal_instances, tz_node) | |
1022 | thermal_cdev_do_update(instance->cdev); | |
1023 | } | |
1024 | ||
4ae46bef | 1025 | /* |
908b9fb7 | 1026 | * Cooling algorithm for both active and passive cooling |
4ae46bef ZR |
1027 | * |
1028 | * 1. if the temperature is higher than a trip point, | |
1029 | * a. if the trend is THERMAL_TREND_RAISING, use higher cooling | |
1030 | * state for this trip point | |
1031 | * b. if the trend is THERMAL_TREND_DROPPING, use lower cooling | |
1032 | * state for this trip point | |
1033 | * | |
1034 | * 2. if the temperature is lower than a trip point, use lower | |
1035 | * cooling state for this trip point | |
1036 | * | |
1037 | * Note that this behaves the same as the previous passive cooling | |
1038 | * algorithm. | |
1039 | */ | |
1040 | ||
1041 | static void thermal_zone_trip_update(struct thermal_zone_device *tz, | |
1042 | int trip, long temp) | |
1043 | { | |
b81b6ba3 | 1044 | struct thermal_instance *instance; |
4ae46bef ZR |
1045 | struct thermal_cooling_device *cdev = NULL; |
1046 | unsigned long cur_state, max_state; | |
1047 | long trip_temp; | |
908b9fb7 | 1048 | enum thermal_trip_type trip_type; |
4ae46bef ZR |
1049 | enum thermal_trend trend; |
1050 | ||
908b9fb7 ZR |
1051 | if (trip == THERMAL_TRIPS_NONE) { |
1052 | trip_temp = tz->forced_passive; | |
1053 | trip_type = THERMAL_TRIPS_NONE; | |
1054 | } else { | |
1055 | tz->ops->get_trip_temp(tz, trip, &trip_temp); | |
1056 | tz->ops->get_trip_type(tz, trip, &trip_type); | |
1057 | } | |
4ae46bef ZR |
1058 | |
1059 | if (!tz->ops->get_trend || tz->ops->get_trend(tz, trip, &trend)) { | |
1060 | /* | |
1061 | * compare the current temperature and previous temperature | |
1062 | * to get the thermal trend, if no special requirement | |
1063 | */ | |
1064 | if (tz->temperature > tz->last_temperature) | |
1065 | trend = THERMAL_TREND_RAISING; | |
1066 | else if (tz->temperature < tz->last_temperature) | |
1067 | trend = THERMAL_TREND_DROPPING; | |
1068 | else | |
1069 | trend = THERMAL_TREND_STABLE; | |
1070 | } | |
1071 | ||
1072 | if (temp >= trip_temp) { | |
cddf31b3 | 1073 | list_for_each_entry(instance, &tz->thermal_instances, tz_node) { |
4ae46bef ZR |
1074 | if (instance->trip != trip) |
1075 | continue; | |
1076 | ||
1077 | cdev = instance->cdev; | |
1078 | ||
1079 | cdev->ops->get_cur_state(cdev, &cur_state); | |
1080 | cdev->ops->get_max_state(cdev, &max_state); | |
1081 | ||
1082 | if (trend == THERMAL_TREND_RAISING) { | |
1083 | cur_state = cur_state < instance->upper ? | |
1084 | (cur_state + 1) : instance->upper; | |
1085 | } else if (trend == THERMAL_TREND_DROPPING) { | |
1086 | cur_state = cur_state > instance->lower ? | |
1087 | (cur_state - 1) : instance->lower; | |
1088 | } | |
908b9fb7 ZR |
1089 | |
1090 | /* activate a passive thermal instance */ | |
1091 | if ((trip_type == THERMAL_TRIP_PASSIVE || | |
1092 | trip_type == THERMAL_TRIPS_NONE) && | |
1093 | instance->target == THERMAL_NO_TARGET) | |
1094 | tz->passive++; | |
1095 | ||
ce119f83 ZR |
1096 | instance->target = cur_state; |
1097 | cdev->updated = false; /* cooling device needs update */ | |
4ae46bef ZR |
1098 | } |
1099 | } else { /* below trip */ | |
cddf31b3 | 1100 | list_for_each_entry(instance, &tz->thermal_instances, tz_node) { |
4ae46bef ZR |
1101 | if (instance->trip != trip) |
1102 | continue; | |
1103 | ||
ce119f83 ZR |
1104 | /* Do not use the inactive thermal instance */ |
1105 | if (instance->target == THERMAL_NO_TARGET) | |
1106 | continue; | |
4ae46bef ZR |
1107 | cdev = instance->cdev; |
1108 | cdev->ops->get_cur_state(cdev, &cur_state); | |
1109 | ||
1110 | cur_state = cur_state > instance->lower ? | |
ce119f83 | 1111 | (cur_state - 1) : THERMAL_NO_TARGET; |
908b9fb7 ZR |
1112 | |
1113 | /* deactivate a passive thermal instance */ | |
1114 | if ((trip_type == THERMAL_TRIP_PASSIVE || | |
1115 | trip_type == THERMAL_TRIPS_NONE) && | |
1116 | cur_state == THERMAL_NO_TARGET) | |
1117 | tz->passive--; | |
ce119f83 ZR |
1118 | instance->target = cur_state; |
1119 | cdev->updated = false; /* cooling device needs update */ | |
4ae46bef ZR |
1120 | } |
1121 | } | |
1122 | ||
1123 | return; | |
1124 | } | |
b1569e99 MG |
1125 | /** |
1126 | * thermal_zone_device_update - force an update of a thermal zone's state | |
1127 | * @ttz: the thermal zone to update | |
1128 | */ | |
1129 | ||
1130 | void thermal_zone_device_update(struct thermal_zone_device *tz) | |
1131 | { | |
1132 | int count, ret = 0; | |
1133 | long temp, trip_temp; | |
1134 | enum thermal_trip_type trip_type; | |
b1569e99 MG |
1135 | |
1136 | mutex_lock(&tz->lock); | |
1137 | ||
0d288162 MB |
1138 | if (tz->ops->get_temp(tz, &temp)) { |
1139 | /* get_temp failed - retry it later */ | |
c5a01dd5 | 1140 | pr_warn("failed to read out thermal zone %d\n", tz->id); |
0d288162 MB |
1141 | goto leave; |
1142 | } | |
b1569e99 | 1143 | |
601f3d42 ZR |
1144 | tz->last_temperature = tz->temperature; |
1145 | tz->temperature = temp; | |
1146 | ||
b1569e99 MG |
1147 | for (count = 0; count < tz->trips; count++) { |
1148 | tz->ops->get_trip_type(tz, count, &trip_type); | |
1149 | tz->ops->get_trip_temp(tz, count, &trip_temp); | |
1150 | ||
1151 | switch (trip_type) { | |
1152 | case THERMAL_TRIP_CRITICAL: | |
29321357 | 1153 | if (temp >= trip_temp) { |
b1569e99 MG |
1154 | if (tz->ops->notify) |
1155 | ret = tz->ops->notify(tz, count, | |
1156 | trip_type); | |
1157 | if (!ret) { | |
c5a01dd5 JP |
1158 | pr_emerg("Critical temperature reached (%ld C), shutting down\n", |
1159 | temp/1000); | |
b1569e99 MG |
1160 | orderly_poweroff(true); |
1161 | } | |
1162 | } | |
1163 | break; | |
1164 | case THERMAL_TRIP_HOT: | |
29321357 | 1165 | if (temp >= trip_temp) |
b1569e99 MG |
1166 | if (tz->ops->notify) |
1167 | tz->ops->notify(tz, count, trip_type); | |
1168 | break; | |
1169 | case THERMAL_TRIP_ACTIVE: | |
4ae46bef | 1170 | thermal_zone_trip_update(tz, count, temp); |
b1569e99 MG |
1171 | break; |
1172 | case THERMAL_TRIP_PASSIVE: | |
29321357 | 1173 | if (temp >= trip_temp || tz->passive) |
908b9fb7 | 1174 | thermal_zone_trip_update(tz, count, temp); |
b1569e99 MG |
1175 | break; |
1176 | } | |
1177 | } | |
03a971a2 MG |
1178 | |
1179 | if (tz->forced_passive) | |
908b9fb7 ZR |
1180 | thermal_zone_trip_update(tz, THERMAL_TRIPS_NONE, temp); |
1181 | thermal_zone_do_update(tz); | |
0d288162 | 1182 | |
caca8b80 | 1183 | leave: |
b1569e99 MG |
1184 | if (tz->passive) |
1185 | thermal_zone_device_set_polling(tz, tz->passive_delay); | |
1186 | else if (tz->polling_delay) | |
1187 | thermal_zone_device_set_polling(tz, tz->polling_delay); | |
3767cb54 FP |
1188 | else |
1189 | thermal_zone_device_set_polling(tz, 0); | |
b1569e99 MG |
1190 | mutex_unlock(&tz->lock); |
1191 | } | |
1192 | EXPORT_SYMBOL(thermal_zone_device_update); | |
1193 | ||
c56f5c03 D |
1194 | /** |
1195 | * create_trip_attrs - create attributes for trip points | |
1196 | * @tz: the thermal zone device | |
1197 | * @mask: Writeable trip point bitmap. | |
1198 | */ | |
1199 | static int create_trip_attrs(struct thermal_zone_device *tz, int mask) | |
1200 | { | |
1201 | int indx; | |
27365a6c | 1202 | int size = sizeof(struct thermal_attr) * tz->trips; |
c56f5c03 | 1203 | |
27365a6c | 1204 | tz->trip_type_attrs = kzalloc(size, GFP_KERNEL); |
c56f5c03 D |
1205 | if (!tz->trip_type_attrs) |
1206 | return -ENOMEM; | |
1207 | ||
27365a6c | 1208 | tz->trip_temp_attrs = kzalloc(size, GFP_KERNEL); |
c56f5c03 D |
1209 | if (!tz->trip_temp_attrs) { |
1210 | kfree(tz->trip_type_attrs); | |
1211 | return -ENOMEM; | |
1212 | } | |
1213 | ||
27365a6c D |
1214 | if (tz->ops->get_trip_hyst) { |
1215 | tz->trip_hyst_attrs = kzalloc(size, GFP_KERNEL); | |
1216 | if (!tz->trip_hyst_attrs) { | |
1217 | kfree(tz->trip_type_attrs); | |
1218 | kfree(tz->trip_temp_attrs); | |
1219 | return -ENOMEM; | |
1220 | } | |
1221 | } | |
c56f5c03 | 1222 | |
27365a6c D |
1223 | |
1224 | for (indx = 0; indx < tz->trips; indx++) { | |
c56f5c03 D |
1225 | /* create trip type attribute */ |
1226 | snprintf(tz->trip_type_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1227 | "trip_point_%d_type", indx); | |
1228 | ||
1229 | sysfs_attr_init(&tz->trip_type_attrs[indx].attr.attr); | |
1230 | tz->trip_type_attrs[indx].attr.attr.name = | |
1231 | tz->trip_type_attrs[indx].name; | |
1232 | tz->trip_type_attrs[indx].attr.attr.mode = S_IRUGO; | |
1233 | tz->trip_type_attrs[indx].attr.show = trip_point_type_show; | |
1234 | ||
1235 | device_create_file(&tz->device, | |
1236 | &tz->trip_type_attrs[indx].attr); | |
1237 | ||
1238 | /* create trip temp attribute */ | |
1239 | snprintf(tz->trip_temp_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1240 | "trip_point_%d_temp", indx); | |
1241 | ||
1242 | sysfs_attr_init(&tz->trip_temp_attrs[indx].attr.attr); | |
1243 | tz->trip_temp_attrs[indx].attr.attr.name = | |
1244 | tz->trip_temp_attrs[indx].name; | |
1245 | tz->trip_temp_attrs[indx].attr.attr.mode = S_IRUGO; | |
1246 | tz->trip_temp_attrs[indx].attr.show = trip_point_temp_show; | |
1247 | if (mask & (1 << indx)) { | |
1248 | tz->trip_temp_attrs[indx].attr.attr.mode |= S_IWUSR; | |
1249 | tz->trip_temp_attrs[indx].attr.store = | |
1250 | trip_point_temp_store; | |
1251 | } | |
1252 | ||
1253 | device_create_file(&tz->device, | |
1254 | &tz->trip_temp_attrs[indx].attr); | |
27365a6c D |
1255 | |
1256 | /* create Optional trip hyst attribute */ | |
1257 | if (!tz->ops->get_trip_hyst) | |
1258 | continue; | |
1259 | snprintf(tz->trip_hyst_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1260 | "trip_point_%d_hyst", indx); | |
1261 | ||
1262 | sysfs_attr_init(&tz->trip_hyst_attrs[indx].attr.attr); | |
1263 | tz->trip_hyst_attrs[indx].attr.attr.name = | |
1264 | tz->trip_hyst_attrs[indx].name; | |
1265 | tz->trip_hyst_attrs[indx].attr.attr.mode = S_IRUGO; | |
1266 | tz->trip_hyst_attrs[indx].attr.show = trip_point_hyst_show; | |
1267 | if (tz->ops->set_trip_hyst) { | |
1268 | tz->trip_hyst_attrs[indx].attr.attr.mode |= S_IWUSR; | |
1269 | tz->trip_hyst_attrs[indx].attr.store = | |
1270 | trip_point_hyst_store; | |
1271 | } | |
1272 | ||
1273 | device_create_file(&tz->device, | |
1274 | &tz->trip_hyst_attrs[indx].attr); | |
c56f5c03 D |
1275 | } |
1276 | return 0; | |
1277 | } | |
1278 | ||
1279 | static void remove_trip_attrs(struct thermal_zone_device *tz) | |
1280 | { | |
1281 | int indx; | |
1282 | ||
1283 | for (indx = 0; indx < tz->trips; indx++) { | |
1284 | device_remove_file(&tz->device, | |
1285 | &tz->trip_type_attrs[indx].attr); | |
1286 | device_remove_file(&tz->device, | |
1287 | &tz->trip_temp_attrs[indx].attr); | |
27365a6c D |
1288 | if (tz->ops->get_trip_hyst) |
1289 | device_remove_file(&tz->device, | |
1290 | &tz->trip_hyst_attrs[indx].attr); | |
c56f5c03 D |
1291 | } |
1292 | kfree(tz->trip_type_attrs); | |
1293 | kfree(tz->trip_temp_attrs); | |
27365a6c | 1294 | kfree(tz->trip_hyst_attrs); |
c56f5c03 D |
1295 | } |
1296 | ||
203d3d4a ZR |
1297 | /** |
1298 | * thermal_zone_device_register - register a new thermal zone device | |
1299 | * @type: the thermal zone device type | |
1300 | * @trips: the number of trip points the thermal zone support | |
c56f5c03 | 1301 | * @mask: a bit string indicating the writeablility of trip points |
203d3d4a ZR |
1302 | * @devdata: private device data |
1303 | * @ops: standard thermal zone device callbacks | |
b1569e99 MG |
1304 | * @passive_delay: number of milliseconds to wait between polls when |
1305 | * performing passive cooling | |
1306 | * @polling_delay: number of milliseconds to wait between polls when checking | |
1307 | * whether trip points have been crossed (0 for interrupt | |
1308 | * driven systems) | |
203d3d4a ZR |
1309 | * |
1310 | * thermal_zone_device_unregister() must be called when the device is no | |
1b7ddb84 | 1311 | * longer needed. The passive cooling depends on the .get_trend() return value. |
203d3d4a | 1312 | */ |
4b1bf587 | 1313 | struct thermal_zone_device *thermal_zone_device_register(const char *type, |
c56f5c03 | 1314 | int trips, int mask, void *devdata, |
5b275ce2 | 1315 | const struct thermal_zone_device_ops *ops, |
1b7ddb84 | 1316 | int passive_delay, int polling_delay) |
203d3d4a ZR |
1317 | { |
1318 | struct thermal_zone_device *tz; | |
1319 | struct thermal_cooling_device *pos; | |
03a971a2 | 1320 | enum thermal_trip_type trip_type; |
203d3d4a ZR |
1321 | int result; |
1322 | int count; | |
03a971a2 | 1323 | int passive = 0; |
203d3d4a | 1324 | |
204dd1d3 | 1325 | if (type && strlen(type) >= THERMAL_NAME_LENGTH) |
3e6fda5c | 1326 | return ERR_PTR(-EINVAL); |
203d3d4a | 1327 | |
c56f5c03 | 1328 | if (trips > THERMAL_MAX_TRIPS || trips < 0 || mask >> trips) |
3e6fda5c | 1329 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1330 | |
1331 | if (!ops || !ops->get_temp) | |
3e6fda5c | 1332 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1333 | |
1334 | tz = kzalloc(sizeof(struct thermal_zone_device), GFP_KERNEL); | |
1335 | if (!tz) | |
3e6fda5c | 1336 | return ERR_PTR(-ENOMEM); |
203d3d4a | 1337 | |
2d374139 | 1338 | INIT_LIST_HEAD(&tz->thermal_instances); |
203d3d4a ZR |
1339 | idr_init(&tz->idr); |
1340 | mutex_init(&tz->lock); | |
1341 | result = get_idr(&thermal_tz_idr, &thermal_idr_lock, &tz->id); | |
1342 | if (result) { | |
1343 | kfree(tz); | |
3e6fda5c | 1344 | return ERR_PTR(result); |
203d3d4a ZR |
1345 | } |
1346 | ||
204dd1d3 | 1347 | strcpy(tz->type, type ? : ""); |
203d3d4a ZR |
1348 | tz->ops = ops; |
1349 | tz->device.class = &thermal_class; | |
1350 | tz->devdata = devdata; | |
1351 | tz->trips = trips; | |
b1569e99 MG |
1352 | tz->passive_delay = passive_delay; |
1353 | tz->polling_delay = polling_delay; | |
1354 | ||
354655ea | 1355 | dev_set_name(&tz->device, "thermal_zone%d", tz->id); |
203d3d4a ZR |
1356 | result = device_register(&tz->device); |
1357 | if (result) { | |
1358 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); | |
1359 | kfree(tz); | |
3e6fda5c | 1360 | return ERR_PTR(result); |
203d3d4a ZR |
1361 | } |
1362 | ||
1363 | /* sys I/F */ | |
1364 | if (type) { | |
1365 | result = device_create_file(&tz->device, &dev_attr_type); | |
1366 | if (result) | |
1367 | goto unregister; | |
1368 | } | |
1369 | ||
1370 | result = device_create_file(&tz->device, &dev_attr_temp); | |
1371 | if (result) | |
1372 | goto unregister; | |
1373 | ||
1374 | if (ops->get_mode) { | |
1375 | result = device_create_file(&tz->device, &dev_attr_mode); | |
1376 | if (result) | |
1377 | goto unregister; | |
1378 | } | |
1379 | ||
c56f5c03 D |
1380 | result = create_trip_attrs(tz, mask); |
1381 | if (result) | |
1382 | goto unregister; | |
1383 | ||
203d3d4a | 1384 | for (count = 0; count < trips; count++) { |
03a971a2 MG |
1385 | tz->ops->get_trip_type(tz, count, &trip_type); |
1386 | if (trip_type == THERMAL_TRIP_PASSIVE) | |
1387 | passive = 1; | |
203d3d4a ZR |
1388 | } |
1389 | ||
03a971a2 MG |
1390 | if (!passive) |
1391 | result = device_create_file(&tz->device, | |
1392 | &dev_attr_passive); | |
1393 | ||
1394 | if (result) | |
1395 | goto unregister; | |
1396 | ||
e68b16ab ZR |
1397 | result = thermal_add_hwmon_sysfs(tz); |
1398 | if (result) | |
1399 | goto unregister; | |
1400 | ||
203d3d4a ZR |
1401 | mutex_lock(&thermal_list_lock); |
1402 | list_add_tail(&tz->node, &thermal_tz_list); | |
1403 | if (ops->bind) | |
1404 | list_for_each_entry(pos, &thermal_cdev_list, node) { | |
543a9561 LB |
1405 | result = ops->bind(tz, pos); |
1406 | if (result) | |
1407 | break; | |
203d3d4a ZR |
1408 | } |
1409 | mutex_unlock(&thermal_list_lock); | |
1410 | ||
b1569e99 MG |
1411 | INIT_DELAYED_WORK(&(tz->poll_queue), thermal_zone_device_check); |
1412 | ||
1413 | thermal_zone_device_update(tz); | |
1414 | ||
203d3d4a ZR |
1415 | if (!result) |
1416 | return tz; | |
1417 | ||
caca8b80 | 1418 | unregister: |
203d3d4a ZR |
1419 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1420 | device_unregister(&tz->device); | |
3e6fda5c | 1421 | return ERR_PTR(result); |
203d3d4a ZR |
1422 | } |
1423 | EXPORT_SYMBOL(thermal_zone_device_register); | |
1424 | ||
1425 | /** | |
1426 | * thermal_device_unregister - removes the registered thermal zone device | |
203d3d4a ZR |
1427 | * @tz: the thermal zone device to remove |
1428 | */ | |
1429 | void thermal_zone_device_unregister(struct thermal_zone_device *tz) | |
1430 | { | |
1431 | struct thermal_cooling_device *cdev; | |
1432 | struct thermal_zone_device *pos = NULL; | |
203d3d4a ZR |
1433 | |
1434 | if (!tz) | |
1435 | return; | |
1436 | ||
1437 | mutex_lock(&thermal_list_lock); | |
1438 | list_for_each_entry(pos, &thermal_tz_list, node) | |
1439 | if (pos == tz) | |
1440 | break; | |
1441 | if (pos != tz) { | |
1442 | /* thermal zone device not found */ | |
1443 | mutex_unlock(&thermal_list_lock); | |
1444 | return; | |
1445 | } | |
1446 | list_del(&tz->node); | |
1447 | if (tz->ops->unbind) | |
1448 | list_for_each_entry(cdev, &thermal_cdev_list, node) | |
1449 | tz->ops->unbind(tz, cdev); | |
1450 | mutex_unlock(&thermal_list_lock); | |
1451 | ||
b1569e99 MG |
1452 | thermal_zone_device_set_polling(tz, 0); |
1453 | ||
203d3d4a ZR |
1454 | if (tz->type[0]) |
1455 | device_remove_file(&tz->device, &dev_attr_type); | |
1456 | device_remove_file(&tz->device, &dev_attr_temp); | |
1457 | if (tz->ops->get_mode) | |
1458 | device_remove_file(&tz->device, &dev_attr_mode); | |
c56f5c03 | 1459 | remove_trip_attrs(tz); |
203d3d4a | 1460 | |
e68b16ab | 1461 | thermal_remove_hwmon_sysfs(tz); |
203d3d4a ZR |
1462 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1463 | idr_destroy(&tz->idr); | |
1464 | mutex_destroy(&tz->lock); | |
1465 | device_unregister(&tz->device); | |
1466 | return; | |
1467 | } | |
1468 | EXPORT_SYMBOL(thermal_zone_device_unregister); | |
1469 | ||
af06216a RW |
1470 | #ifdef CONFIG_NET |
1471 | static struct genl_family thermal_event_genl_family = { | |
1472 | .id = GENL_ID_GENERATE, | |
1473 | .name = THERMAL_GENL_FAMILY_NAME, | |
1474 | .version = THERMAL_GENL_VERSION, | |
1475 | .maxattr = THERMAL_GENL_ATTR_MAX, | |
1476 | }; | |
1477 | ||
1478 | static struct genl_multicast_group thermal_event_mcgrp = { | |
1479 | .name = THERMAL_GENL_MCAST_GROUP_NAME, | |
1480 | }; | |
1481 | ||
2d58d7ea | 1482 | int thermal_generate_netlink_event(u32 orig, enum events event) |
4cb18728 D |
1483 | { |
1484 | struct sk_buff *skb; | |
1485 | struct nlattr *attr; | |
1486 | struct thermal_genl_event *thermal_event; | |
1487 | void *msg_header; | |
1488 | int size; | |
1489 | int result; | |
b11de07c | 1490 | static unsigned int thermal_event_seqnum; |
4cb18728 D |
1491 | |
1492 | /* allocate memory */ | |
886ee546 JP |
1493 | size = nla_total_size(sizeof(struct thermal_genl_event)) + |
1494 | nla_total_size(0); | |
4cb18728 D |
1495 | |
1496 | skb = genlmsg_new(size, GFP_ATOMIC); | |
1497 | if (!skb) | |
1498 | return -ENOMEM; | |
1499 | ||
1500 | /* add the genetlink message header */ | |
1501 | msg_header = genlmsg_put(skb, 0, thermal_event_seqnum++, | |
1502 | &thermal_event_genl_family, 0, | |
1503 | THERMAL_GENL_CMD_EVENT); | |
1504 | if (!msg_header) { | |
1505 | nlmsg_free(skb); | |
1506 | return -ENOMEM; | |
1507 | } | |
1508 | ||
1509 | /* fill the data */ | |
886ee546 JP |
1510 | attr = nla_reserve(skb, THERMAL_GENL_ATTR_EVENT, |
1511 | sizeof(struct thermal_genl_event)); | |
4cb18728 D |
1512 | |
1513 | if (!attr) { | |
1514 | nlmsg_free(skb); | |
1515 | return -EINVAL; | |
1516 | } | |
1517 | ||
1518 | thermal_event = nla_data(attr); | |
1519 | if (!thermal_event) { | |
1520 | nlmsg_free(skb); | |
1521 | return -EINVAL; | |
1522 | } | |
1523 | ||
1524 | memset(thermal_event, 0, sizeof(struct thermal_genl_event)); | |
1525 | ||
1526 | thermal_event->orig = orig; | |
1527 | thermal_event->event = event; | |
1528 | ||
1529 | /* send multicast genetlink message */ | |
1530 | result = genlmsg_end(skb, msg_header); | |
1531 | if (result < 0) { | |
1532 | nlmsg_free(skb); | |
1533 | return result; | |
1534 | } | |
1535 | ||
1536 | result = genlmsg_multicast(skb, 0, thermal_event_mcgrp.id, GFP_ATOMIC); | |
1537 | if (result) | |
c5a01dd5 | 1538 | pr_info("failed to send netlink event:%d\n", result); |
4cb18728 D |
1539 | |
1540 | return result; | |
1541 | } | |
2d58d7ea | 1542 | EXPORT_SYMBOL(thermal_generate_netlink_event); |
4cb18728 D |
1543 | |
1544 | static int genetlink_init(void) | |
1545 | { | |
1546 | int result; | |
1547 | ||
1548 | result = genl_register_family(&thermal_event_genl_family); | |
1549 | if (result) | |
1550 | return result; | |
1551 | ||
1552 | result = genl_register_mc_group(&thermal_event_genl_family, | |
1553 | &thermal_event_mcgrp); | |
1554 | if (result) | |
1555 | genl_unregister_family(&thermal_event_genl_family); | |
1556 | return result; | |
1557 | } | |
1558 | ||
af06216a RW |
1559 | static void genetlink_exit(void) |
1560 | { | |
1561 | genl_unregister_family(&thermal_event_genl_family); | |
1562 | } | |
1563 | #else /* !CONFIG_NET */ | |
1564 | static inline int genetlink_init(void) { return 0; } | |
1565 | static inline void genetlink_exit(void) {} | |
1566 | #endif /* !CONFIG_NET */ | |
1567 | ||
203d3d4a ZR |
1568 | static int __init thermal_init(void) |
1569 | { | |
1570 | int result = 0; | |
1571 | ||
1572 | result = class_register(&thermal_class); | |
1573 | if (result) { | |
1574 | idr_destroy(&thermal_tz_idr); | |
1575 | idr_destroy(&thermal_cdev_idr); | |
1576 | mutex_destroy(&thermal_idr_lock); | |
1577 | mutex_destroy(&thermal_list_lock); | |
1578 | } | |
4cb18728 | 1579 | result = genetlink_init(); |
203d3d4a ZR |
1580 | return result; |
1581 | } | |
1582 | ||
1583 | static void __exit thermal_exit(void) | |
1584 | { | |
1585 | class_unregister(&thermal_class); | |
1586 | idr_destroy(&thermal_tz_idr); | |
1587 | idr_destroy(&thermal_cdev_idr); | |
1588 | mutex_destroy(&thermal_idr_lock); | |
1589 | mutex_destroy(&thermal_list_lock); | |
4cb18728 | 1590 | genetlink_exit(); |
203d3d4a ZR |
1591 | } |
1592 | ||
4cb18728 | 1593 | fs_initcall(thermal_init); |
203d3d4a | 1594 | module_exit(thermal_exit); |