Commit | Line | Data |
---|---|---|
203d3d4a ZR |
1 | /* |
2 | * thermal.c - Generic Thermal Management Sysfs support. | |
3 | * | |
4 | * Copyright (C) 2008 Intel Corp | |
5 | * Copyright (C) 2008 Zhang Rui <rui.zhang@intel.com> | |
6 | * Copyright (C) 2008 Sujith Thomas <sujith.thomas@intel.com> | |
7 | * | |
8 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; version 2 of the License. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License along | |
20 | * with this program; if not, write to the Free Software Foundation, Inc., | |
21 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
22 | * | |
23 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
24 | */ | |
25 | ||
c5a01dd5 JP |
26 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
27 | ||
203d3d4a ZR |
28 | #include <linux/module.h> |
29 | #include <linux/device.h> | |
30 | #include <linux/err.h> | |
5a0e3ad6 | 31 | #include <linux/slab.h> |
203d3d4a ZR |
32 | #include <linux/kdev_t.h> |
33 | #include <linux/idr.h> | |
34 | #include <linux/thermal.h> | |
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 | |
63c4ec90 | 40 | MODULE_AUTHOR("Zhang Rui"); |
203d3d4a ZR |
41 | MODULE_DESCRIPTION("Generic thermal management sysfs support"); |
42 | MODULE_LICENSE("GPL"); | |
43 | ||
74051ba5 ZR |
44 | /* |
45 | * This structure is used to describe the behavior of | |
46 | * a certain cooling device on a certain trip point | |
47 | * in a certain thermal zone | |
48 | */ | |
203d3d4a ZR |
49 | struct thermal_cooling_device_instance { |
50 | int id; | |
51 | char name[THERMAL_NAME_LENGTH]; | |
52 | struct thermal_zone_device *tz; | |
53 | struct thermal_cooling_device *cdev; | |
54 | int trip; | |
74051ba5 ZR |
55 | unsigned long upper; /* Highest cooling state for this trip point */ |
56 | unsigned long lower; /* Lowest cooling state for this trip point */ | |
203d3d4a ZR |
57 | char attr_name[THERMAL_NAME_LENGTH]; |
58 | struct device_attribute attr; | |
59 | struct list_head node; | |
60 | }; | |
61 | ||
62 | static DEFINE_IDR(thermal_tz_idr); | |
63 | static DEFINE_IDR(thermal_cdev_idr); | |
64 | static DEFINE_MUTEX(thermal_idr_lock); | |
65 | ||
66 | static LIST_HEAD(thermal_tz_list); | |
67 | static LIST_HEAD(thermal_cdev_list); | |
68 | static DEFINE_MUTEX(thermal_list_lock); | |
69 | ||
70 | static int get_idr(struct idr *idr, struct mutex *lock, int *id) | |
71 | { | |
72 | int err; | |
73 | ||
caca8b80 | 74 | again: |
203d3d4a ZR |
75 | if (unlikely(idr_pre_get(idr, GFP_KERNEL) == 0)) |
76 | return -ENOMEM; | |
77 | ||
78 | if (lock) | |
79 | mutex_lock(lock); | |
80 | err = idr_get_new(idr, NULL, id); | |
81 | if (lock) | |
82 | mutex_unlock(lock); | |
83 | if (unlikely(err == -EAGAIN)) | |
84 | goto again; | |
85 | else if (unlikely(err)) | |
86 | return err; | |
87 | ||
88 | *id = *id & MAX_ID_MASK; | |
89 | return 0; | |
90 | } | |
91 | ||
92 | static void release_idr(struct idr *idr, struct mutex *lock, int id) | |
93 | { | |
94 | if (lock) | |
95 | mutex_lock(lock); | |
96 | idr_remove(idr, id); | |
97 | if (lock) | |
98 | mutex_unlock(lock); | |
99 | } | |
100 | ||
101 | /* sys I/F for thermal zone */ | |
102 | ||
103 | #define to_thermal_zone(_dev) \ | |
104 | container_of(_dev, struct thermal_zone_device, device) | |
105 | ||
106 | static ssize_t | |
107 | type_show(struct device *dev, struct device_attribute *attr, char *buf) | |
108 | { | |
109 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
110 | ||
111 | return sprintf(buf, "%s\n", tz->type); | |
112 | } | |
113 | ||
114 | static ssize_t | |
115 | temp_show(struct device *dev, struct device_attribute *attr, char *buf) | |
116 | { | |
117 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
118 | long temperature; |
119 | int ret; | |
203d3d4a ZR |
120 | |
121 | if (!tz->ops->get_temp) | |
122 | return -EPERM; | |
123 | ||
6503e5df MG |
124 | ret = tz->ops->get_temp(tz, &temperature); |
125 | ||
126 | if (ret) | |
127 | return ret; | |
128 | ||
129 | return sprintf(buf, "%ld\n", temperature); | |
203d3d4a ZR |
130 | } |
131 | ||
132 | static ssize_t | |
133 | mode_show(struct device *dev, struct device_attribute *attr, char *buf) | |
134 | { | |
135 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
136 | enum thermal_device_mode mode; |
137 | int result; | |
203d3d4a ZR |
138 | |
139 | if (!tz->ops->get_mode) | |
140 | return -EPERM; | |
141 | ||
6503e5df MG |
142 | result = tz->ops->get_mode(tz, &mode); |
143 | if (result) | |
144 | return result; | |
145 | ||
146 | return sprintf(buf, "%s\n", mode == THERMAL_DEVICE_ENABLED ? "enabled" | |
147 | : "disabled"); | |
203d3d4a ZR |
148 | } |
149 | ||
150 | static ssize_t | |
151 | mode_store(struct device *dev, struct device_attribute *attr, | |
152 | const char *buf, size_t count) | |
153 | { | |
154 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
155 | int result; | |
156 | ||
157 | if (!tz->ops->set_mode) | |
158 | return -EPERM; | |
159 | ||
f1f0e2ac | 160 | if (!strncmp(buf, "enabled", sizeof("enabled") - 1)) |
6503e5df | 161 | result = tz->ops->set_mode(tz, THERMAL_DEVICE_ENABLED); |
f1f0e2ac | 162 | else if (!strncmp(buf, "disabled", sizeof("disabled") - 1)) |
6503e5df MG |
163 | result = tz->ops->set_mode(tz, THERMAL_DEVICE_DISABLED); |
164 | else | |
165 | result = -EINVAL; | |
166 | ||
203d3d4a ZR |
167 | if (result) |
168 | return result; | |
169 | ||
170 | return count; | |
171 | } | |
172 | ||
173 | static ssize_t | |
174 | trip_point_type_show(struct device *dev, struct device_attribute *attr, | |
175 | char *buf) | |
176 | { | |
177 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
178 | enum thermal_trip_type type; |
179 | int trip, result; | |
203d3d4a ZR |
180 | |
181 | if (!tz->ops->get_trip_type) | |
182 | return -EPERM; | |
183 | ||
184 | if (!sscanf(attr->attr.name, "trip_point_%d_type", &trip)) | |
185 | return -EINVAL; | |
186 | ||
6503e5df MG |
187 | result = tz->ops->get_trip_type(tz, trip, &type); |
188 | if (result) | |
189 | return result; | |
190 | ||
191 | switch (type) { | |
192 | case THERMAL_TRIP_CRITICAL: | |
625120a4 | 193 | return sprintf(buf, "critical\n"); |
6503e5df | 194 | case THERMAL_TRIP_HOT: |
625120a4 | 195 | return sprintf(buf, "hot\n"); |
6503e5df | 196 | case THERMAL_TRIP_PASSIVE: |
625120a4 | 197 | return sprintf(buf, "passive\n"); |
6503e5df | 198 | case THERMAL_TRIP_ACTIVE: |
625120a4 | 199 | return sprintf(buf, "active\n"); |
6503e5df | 200 | default: |
625120a4 | 201 | return sprintf(buf, "unknown\n"); |
6503e5df | 202 | } |
203d3d4a ZR |
203 | } |
204 | ||
c56f5c03 D |
205 | static ssize_t |
206 | trip_point_temp_store(struct device *dev, struct device_attribute *attr, | |
207 | const char *buf, size_t count) | |
208 | { | |
209 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
210 | int trip, ret; | |
211 | unsigned long temperature; | |
212 | ||
213 | if (!tz->ops->set_trip_temp) | |
214 | return -EPERM; | |
215 | ||
216 | if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip)) | |
217 | return -EINVAL; | |
218 | ||
219 | if (kstrtoul(buf, 10, &temperature)) | |
220 | return -EINVAL; | |
221 | ||
222 | ret = tz->ops->set_trip_temp(tz, trip, temperature); | |
223 | ||
224 | return ret ? ret : count; | |
225 | } | |
226 | ||
203d3d4a ZR |
227 | static ssize_t |
228 | trip_point_temp_show(struct device *dev, struct device_attribute *attr, | |
229 | char *buf) | |
230 | { | |
231 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
232 | int trip, ret; |
233 | long temperature; | |
203d3d4a ZR |
234 | |
235 | if (!tz->ops->get_trip_temp) | |
236 | return -EPERM; | |
237 | ||
238 | if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip)) | |
239 | return -EINVAL; | |
240 | ||
6503e5df MG |
241 | ret = tz->ops->get_trip_temp(tz, trip, &temperature); |
242 | ||
243 | if (ret) | |
244 | return ret; | |
245 | ||
246 | return sprintf(buf, "%ld\n", temperature); | |
203d3d4a ZR |
247 | } |
248 | ||
27365a6c D |
249 | static ssize_t |
250 | trip_point_hyst_store(struct device *dev, struct device_attribute *attr, | |
251 | const char *buf, size_t count) | |
252 | { | |
253 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
254 | int trip, ret; | |
255 | unsigned long temperature; | |
256 | ||
257 | if (!tz->ops->set_trip_hyst) | |
258 | return -EPERM; | |
259 | ||
260 | if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip)) | |
261 | return -EINVAL; | |
262 | ||
263 | if (kstrtoul(buf, 10, &temperature)) | |
264 | return -EINVAL; | |
265 | ||
266 | /* | |
267 | * We are not doing any check on the 'temperature' value | |
268 | * here. The driver implementing 'set_trip_hyst' has to | |
269 | * take care of this. | |
270 | */ | |
271 | ret = tz->ops->set_trip_hyst(tz, trip, temperature); | |
272 | ||
273 | return ret ? ret : count; | |
274 | } | |
275 | ||
276 | static ssize_t | |
277 | trip_point_hyst_show(struct device *dev, struct device_attribute *attr, | |
278 | char *buf) | |
279 | { | |
280 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
281 | int trip, ret; | |
282 | unsigned long temperature; | |
283 | ||
284 | if (!tz->ops->get_trip_hyst) | |
285 | return -EPERM; | |
286 | ||
287 | if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip)) | |
288 | return -EINVAL; | |
289 | ||
290 | ret = tz->ops->get_trip_hyst(tz, trip, &temperature); | |
291 | ||
292 | return ret ? ret : sprintf(buf, "%ld\n", temperature); | |
293 | } | |
294 | ||
03a971a2 MG |
295 | static ssize_t |
296 | passive_store(struct device *dev, struct device_attribute *attr, | |
297 | const char *buf, size_t count) | |
298 | { | |
299 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
300 | struct thermal_cooling_device *cdev = NULL; | |
301 | int state; | |
302 | ||
303 | if (!sscanf(buf, "%d\n", &state)) | |
304 | return -EINVAL; | |
305 | ||
3d8e3ad8 FP |
306 | /* sanity check: values below 1000 millicelcius don't make sense |
307 | * and can cause the system to go into a thermal heart attack | |
308 | */ | |
309 | if (state && state < 1000) | |
310 | return -EINVAL; | |
311 | ||
03a971a2 MG |
312 | if (state && !tz->forced_passive) { |
313 | mutex_lock(&thermal_list_lock); | |
314 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
315 | if (!strncmp("Processor", cdev->type, | |
316 | sizeof("Processor"))) | |
317 | thermal_zone_bind_cooling_device(tz, | |
9d99842f ZR |
318 | THERMAL_TRIPS_NONE, cdev, |
319 | THERMAL_NO_LIMIT, | |
320 | THERMAL_NO_LIMIT); | |
03a971a2 MG |
321 | } |
322 | mutex_unlock(&thermal_list_lock); | |
e4143b03 FP |
323 | if (!tz->passive_delay) |
324 | tz->passive_delay = 1000; | |
03a971a2 MG |
325 | } else if (!state && tz->forced_passive) { |
326 | mutex_lock(&thermal_list_lock); | |
327 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
328 | if (!strncmp("Processor", cdev->type, | |
329 | sizeof("Processor"))) | |
330 | thermal_zone_unbind_cooling_device(tz, | |
331 | THERMAL_TRIPS_NONE, | |
332 | cdev); | |
333 | } | |
334 | mutex_unlock(&thermal_list_lock); | |
e4143b03 | 335 | tz->passive_delay = 0; |
03a971a2 MG |
336 | } |
337 | ||
03a971a2 MG |
338 | tz->forced_passive = state; |
339 | ||
340 | thermal_zone_device_update(tz); | |
341 | ||
342 | return count; | |
343 | } | |
344 | ||
345 | static ssize_t | |
346 | passive_show(struct device *dev, struct device_attribute *attr, | |
347 | char *buf) | |
348 | { | |
349 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
350 | ||
351 | return sprintf(buf, "%d\n", tz->forced_passive); | |
352 | } | |
353 | ||
203d3d4a ZR |
354 | static DEVICE_ATTR(type, 0444, type_show, NULL); |
355 | static DEVICE_ATTR(temp, 0444, temp_show, NULL); | |
356 | static DEVICE_ATTR(mode, 0644, mode_show, mode_store); | |
886ee546 | 357 | static DEVICE_ATTR(passive, S_IRUGO | S_IWUSR, passive_show, passive_store); |
203d3d4a | 358 | |
203d3d4a ZR |
359 | /* sys I/F for cooling device */ |
360 | #define to_cooling_device(_dev) \ | |
361 | container_of(_dev, struct thermal_cooling_device, device) | |
362 | ||
363 | static ssize_t | |
364 | thermal_cooling_device_type_show(struct device *dev, | |
365 | struct device_attribute *attr, char *buf) | |
366 | { | |
367 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
368 | ||
369 | return sprintf(buf, "%s\n", cdev->type); | |
370 | } | |
371 | ||
372 | static ssize_t | |
373 | thermal_cooling_device_max_state_show(struct device *dev, | |
374 | struct device_attribute *attr, char *buf) | |
375 | { | |
376 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df MG |
377 | unsigned long state; |
378 | int ret; | |
203d3d4a | 379 | |
6503e5df MG |
380 | ret = cdev->ops->get_max_state(cdev, &state); |
381 | if (ret) | |
382 | return ret; | |
383 | return sprintf(buf, "%ld\n", state); | |
203d3d4a ZR |
384 | } |
385 | ||
386 | static ssize_t | |
387 | thermal_cooling_device_cur_state_show(struct device *dev, | |
388 | struct device_attribute *attr, char *buf) | |
389 | { | |
390 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df MG |
391 | unsigned long state; |
392 | int ret; | |
203d3d4a | 393 | |
6503e5df MG |
394 | ret = cdev->ops->get_cur_state(cdev, &state); |
395 | if (ret) | |
396 | return ret; | |
397 | return sprintf(buf, "%ld\n", state); | |
203d3d4a ZR |
398 | } |
399 | ||
400 | static ssize_t | |
401 | thermal_cooling_device_cur_state_store(struct device *dev, | |
402 | struct device_attribute *attr, | |
403 | const char *buf, size_t count) | |
404 | { | |
405 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df | 406 | unsigned long state; |
203d3d4a ZR |
407 | int result; |
408 | ||
6503e5df | 409 | if (!sscanf(buf, "%ld\n", &state)) |
203d3d4a ZR |
410 | return -EINVAL; |
411 | ||
edb94918 | 412 | if ((long)state < 0) |
203d3d4a ZR |
413 | return -EINVAL; |
414 | ||
415 | result = cdev->ops->set_cur_state(cdev, state); | |
416 | if (result) | |
417 | return result; | |
418 | return count; | |
419 | } | |
420 | ||
421 | static struct device_attribute dev_attr_cdev_type = | |
543a9561 | 422 | __ATTR(type, 0444, thermal_cooling_device_type_show, NULL); |
203d3d4a ZR |
423 | static DEVICE_ATTR(max_state, 0444, |
424 | thermal_cooling_device_max_state_show, NULL); | |
425 | static DEVICE_ATTR(cur_state, 0644, | |
426 | thermal_cooling_device_cur_state_show, | |
427 | thermal_cooling_device_cur_state_store); | |
428 | ||
429 | static ssize_t | |
430 | thermal_cooling_device_trip_point_show(struct device *dev, | |
543a9561 | 431 | struct device_attribute *attr, char *buf) |
203d3d4a ZR |
432 | { |
433 | struct thermal_cooling_device_instance *instance; | |
434 | ||
435 | instance = | |
436 | container_of(attr, struct thermal_cooling_device_instance, attr); | |
437 | ||
438 | if (instance->trip == THERMAL_TRIPS_NONE) | |
439 | return sprintf(buf, "-1\n"); | |
440 | else | |
441 | return sprintf(buf, "%d\n", instance->trip); | |
442 | } | |
443 | ||
444 | /* Device management */ | |
445 | ||
16d75239 RH |
446 | #if defined(CONFIG_THERMAL_HWMON) |
447 | ||
e68b16ab ZR |
448 | /* hwmon sys I/F */ |
449 | #include <linux/hwmon.h> | |
31f5396a JD |
450 | |
451 | /* thermal zone devices with the same type share one hwmon device */ | |
452 | struct thermal_hwmon_device { | |
453 | char type[THERMAL_NAME_LENGTH]; | |
454 | struct device *device; | |
455 | int count; | |
456 | struct list_head tz_list; | |
457 | struct list_head node; | |
458 | }; | |
459 | ||
460 | struct thermal_hwmon_attr { | |
461 | struct device_attribute attr; | |
462 | char name[16]; | |
463 | }; | |
464 | ||
465 | /* one temperature input for each thermal zone */ | |
466 | struct thermal_hwmon_temp { | |
467 | struct list_head hwmon_node; | |
468 | struct thermal_zone_device *tz; | |
469 | struct thermal_hwmon_attr temp_input; /* hwmon sys attr */ | |
470 | struct thermal_hwmon_attr temp_crit; /* hwmon sys attr */ | |
471 | }; | |
472 | ||
e68b16ab ZR |
473 | static LIST_HEAD(thermal_hwmon_list); |
474 | ||
475 | static ssize_t | |
476 | name_show(struct device *dev, struct device_attribute *attr, char *buf) | |
477 | { | |
0e968a3b | 478 | struct thermal_hwmon_device *hwmon = dev_get_drvdata(dev); |
e68b16ab ZR |
479 | return sprintf(buf, "%s\n", hwmon->type); |
480 | } | |
481 | static DEVICE_ATTR(name, 0444, name_show, NULL); | |
482 | ||
483 | static ssize_t | |
484 | temp_input_show(struct device *dev, struct device_attribute *attr, char *buf) | |
485 | { | |
6503e5df MG |
486 | long temperature; |
487 | int ret; | |
e68b16ab ZR |
488 | struct thermal_hwmon_attr *hwmon_attr |
489 | = container_of(attr, struct thermal_hwmon_attr, attr); | |
31f5396a JD |
490 | struct thermal_hwmon_temp *temp |
491 | = container_of(hwmon_attr, struct thermal_hwmon_temp, | |
e68b16ab | 492 | temp_input); |
31f5396a | 493 | struct thermal_zone_device *tz = temp->tz; |
e68b16ab | 494 | |
6503e5df MG |
495 | ret = tz->ops->get_temp(tz, &temperature); |
496 | ||
497 | if (ret) | |
498 | return ret; | |
499 | ||
500 | return sprintf(buf, "%ld\n", temperature); | |
e68b16ab ZR |
501 | } |
502 | ||
503 | static ssize_t | |
504 | temp_crit_show(struct device *dev, struct device_attribute *attr, | |
505 | char *buf) | |
506 | { | |
507 | struct thermal_hwmon_attr *hwmon_attr | |
508 | = container_of(attr, struct thermal_hwmon_attr, attr); | |
31f5396a JD |
509 | struct thermal_hwmon_temp *temp |
510 | = container_of(hwmon_attr, struct thermal_hwmon_temp, | |
e68b16ab | 511 | temp_crit); |
31f5396a | 512 | struct thermal_zone_device *tz = temp->tz; |
6503e5df MG |
513 | long temperature; |
514 | int ret; | |
515 | ||
516 | ret = tz->ops->get_trip_temp(tz, 0, &temperature); | |
517 | if (ret) | |
518 | return ret; | |
e68b16ab | 519 | |
6503e5df | 520 | return sprintf(buf, "%ld\n", temperature); |
e68b16ab ZR |
521 | } |
522 | ||
523 | ||
0d97d7a4 JD |
524 | static struct thermal_hwmon_device * |
525 | thermal_hwmon_lookup_by_type(const struct thermal_zone_device *tz) | |
e68b16ab ZR |
526 | { |
527 | struct thermal_hwmon_device *hwmon; | |
e68b16ab ZR |
528 | |
529 | mutex_lock(&thermal_list_lock); | |
530 | list_for_each_entry(hwmon, &thermal_hwmon_list, node) | |
531 | if (!strcmp(hwmon->type, tz->type)) { | |
e68b16ab | 532 | mutex_unlock(&thermal_list_lock); |
0d97d7a4 | 533 | return hwmon; |
e68b16ab ZR |
534 | } |
535 | mutex_unlock(&thermal_list_lock); | |
536 | ||
0d97d7a4 JD |
537 | return NULL; |
538 | } | |
539 | ||
31f5396a JD |
540 | /* Find the temperature input matching a given thermal zone */ |
541 | static struct thermal_hwmon_temp * | |
542 | thermal_hwmon_lookup_temp(const struct thermal_hwmon_device *hwmon, | |
543 | const struct thermal_zone_device *tz) | |
544 | { | |
545 | struct thermal_hwmon_temp *temp; | |
546 | ||
547 | mutex_lock(&thermal_list_lock); | |
548 | list_for_each_entry(temp, &hwmon->tz_list, hwmon_node) | |
549 | if (temp->tz == tz) { | |
550 | mutex_unlock(&thermal_list_lock); | |
551 | return temp; | |
552 | } | |
553 | mutex_unlock(&thermal_list_lock); | |
554 | ||
555 | return NULL; | |
556 | } | |
557 | ||
0d97d7a4 JD |
558 | static int |
559 | thermal_add_hwmon_sysfs(struct thermal_zone_device *tz) | |
560 | { | |
561 | struct thermal_hwmon_device *hwmon; | |
31f5396a | 562 | struct thermal_hwmon_temp *temp; |
0d97d7a4 JD |
563 | int new_hwmon_device = 1; |
564 | int result; | |
565 | ||
566 | hwmon = thermal_hwmon_lookup_by_type(tz); | |
567 | if (hwmon) { | |
568 | new_hwmon_device = 0; | |
569 | goto register_sys_interface; | |
570 | } | |
571 | ||
e68b16ab ZR |
572 | hwmon = kzalloc(sizeof(struct thermal_hwmon_device), GFP_KERNEL); |
573 | if (!hwmon) | |
574 | return -ENOMEM; | |
575 | ||
576 | INIT_LIST_HEAD(&hwmon->tz_list); | |
577 | strlcpy(hwmon->type, tz->type, THERMAL_NAME_LENGTH); | |
578 | hwmon->device = hwmon_device_register(NULL); | |
579 | if (IS_ERR(hwmon->device)) { | |
580 | result = PTR_ERR(hwmon->device); | |
581 | goto free_mem; | |
582 | } | |
0e968a3b | 583 | dev_set_drvdata(hwmon->device, hwmon); |
e68b16ab ZR |
584 | result = device_create_file(hwmon->device, &dev_attr_name); |
585 | if (result) | |
b299eb5c | 586 | goto free_mem; |
e68b16ab ZR |
587 | |
588 | register_sys_interface: | |
31f5396a JD |
589 | temp = kzalloc(sizeof(struct thermal_hwmon_temp), GFP_KERNEL); |
590 | if (!temp) { | |
591 | result = -ENOMEM; | |
592 | goto unregister_name; | |
593 | } | |
594 | ||
595 | temp->tz = tz; | |
e68b16ab ZR |
596 | hwmon->count++; |
597 | ||
31f5396a | 598 | snprintf(temp->temp_input.name, THERMAL_NAME_LENGTH, |
e68b16ab | 599 | "temp%d_input", hwmon->count); |
31f5396a JD |
600 | temp->temp_input.attr.attr.name = temp->temp_input.name; |
601 | temp->temp_input.attr.attr.mode = 0444; | |
602 | temp->temp_input.attr.show = temp_input_show; | |
603 | sysfs_attr_init(&temp->temp_input.attr.attr); | |
604 | result = device_create_file(hwmon->device, &temp->temp_input.attr); | |
e68b16ab | 605 | if (result) |
31f5396a | 606 | goto free_temp_mem; |
e68b16ab ZR |
607 | |
608 | if (tz->ops->get_crit_temp) { | |
609 | unsigned long temperature; | |
610 | if (!tz->ops->get_crit_temp(tz, &temperature)) { | |
31f5396a | 611 | snprintf(temp->temp_crit.name, THERMAL_NAME_LENGTH, |
e68b16ab | 612 | "temp%d_crit", hwmon->count); |
31f5396a JD |
613 | temp->temp_crit.attr.attr.name = temp->temp_crit.name; |
614 | temp->temp_crit.attr.attr.mode = 0444; | |
615 | temp->temp_crit.attr.show = temp_crit_show; | |
616 | sysfs_attr_init(&temp->temp_crit.attr.attr); | |
e68b16ab | 617 | result = device_create_file(hwmon->device, |
31f5396a | 618 | &temp->temp_crit.attr); |
e68b16ab | 619 | if (result) |
b299eb5c | 620 | goto unregister_input; |
e68b16ab ZR |
621 | } |
622 | } | |
623 | ||
624 | mutex_lock(&thermal_list_lock); | |
625 | if (new_hwmon_device) | |
626 | list_add_tail(&hwmon->node, &thermal_hwmon_list); | |
31f5396a | 627 | list_add_tail(&temp->hwmon_node, &hwmon->tz_list); |
e68b16ab ZR |
628 | mutex_unlock(&thermal_list_lock); |
629 | ||
630 | return 0; | |
631 | ||
b299eb5c | 632 | unregister_input: |
31f5396a JD |
633 | device_remove_file(hwmon->device, &temp->temp_input.attr); |
634 | free_temp_mem: | |
635 | kfree(temp); | |
b299eb5c | 636 | unregister_name: |
e68b16ab ZR |
637 | if (new_hwmon_device) { |
638 | device_remove_file(hwmon->device, &dev_attr_name); | |
639 | hwmon_device_unregister(hwmon->device); | |
640 | } | |
641 | free_mem: | |
642 | if (new_hwmon_device) | |
643 | kfree(hwmon); | |
644 | ||
645 | return result; | |
646 | } | |
647 | ||
648 | static void | |
649 | thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz) | |
650 | { | |
31f5396a JD |
651 | struct thermal_hwmon_device *hwmon; |
652 | struct thermal_hwmon_temp *temp; | |
653 | ||
654 | hwmon = thermal_hwmon_lookup_by_type(tz); | |
655 | if (unlikely(!hwmon)) { | |
656 | /* Should never happen... */ | |
657 | dev_dbg(&tz->device, "hwmon device lookup failed!\n"); | |
658 | return; | |
659 | } | |
660 | ||
661 | temp = thermal_hwmon_lookup_temp(hwmon, tz); | |
662 | if (unlikely(!temp)) { | |
663 | /* Should never happen... */ | |
664 | dev_dbg(&tz->device, "temperature input lookup failed!\n"); | |
665 | return; | |
666 | } | |
e68b16ab | 667 | |
31f5396a | 668 | device_remove_file(hwmon->device, &temp->temp_input.attr); |
b299eb5c | 669 | if (tz->ops->get_crit_temp) |
31f5396a | 670 | device_remove_file(hwmon->device, &temp->temp_crit.attr); |
e68b16ab ZR |
671 | |
672 | mutex_lock(&thermal_list_lock); | |
31f5396a JD |
673 | list_del(&temp->hwmon_node); |
674 | kfree(temp); | |
e68b16ab ZR |
675 | if (!list_empty(&hwmon->tz_list)) { |
676 | mutex_unlock(&thermal_list_lock); | |
677 | return; | |
678 | } | |
679 | list_del(&hwmon->node); | |
680 | mutex_unlock(&thermal_list_lock); | |
681 | ||
682 | device_remove_file(hwmon->device, &dev_attr_name); | |
683 | hwmon_device_unregister(hwmon->device); | |
684 | kfree(hwmon); | |
685 | } | |
686 | #else | |
687 | static int | |
688 | thermal_add_hwmon_sysfs(struct thermal_zone_device *tz) | |
689 | { | |
690 | return 0; | |
691 | } | |
692 | ||
693 | static void | |
694 | thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz) | |
695 | { | |
696 | } | |
697 | #endif | |
698 | ||
b1569e99 MG |
699 | static void thermal_zone_device_set_polling(struct thermal_zone_device *tz, |
700 | int delay) | |
701 | { | |
702 | cancel_delayed_work(&(tz->poll_queue)); | |
703 | ||
704 | if (!delay) | |
705 | return; | |
706 | ||
707 | if (delay > 1000) | |
51e20d0e | 708 | queue_delayed_work(system_freezable_wq, &(tz->poll_queue), |
b1569e99 MG |
709 | round_jiffies(msecs_to_jiffies(delay))); |
710 | else | |
51e20d0e | 711 | queue_delayed_work(system_freezable_wq, &(tz->poll_queue), |
b1569e99 MG |
712 | msecs_to_jiffies(delay)); |
713 | } | |
714 | ||
715 | static void thermal_zone_device_passive(struct thermal_zone_device *tz, | |
716 | int temp, int trip_temp, int trip) | |
717 | { | |
1b7ddb84 | 718 | enum thermal_trend trend; |
b1569e99 MG |
719 | struct thermal_cooling_device_instance *instance; |
720 | struct thermal_cooling_device *cdev; | |
721 | long state, max_state; | |
722 | ||
1b7ddb84 | 723 | if (!tz->ops->get_trend || tz->ops->get_trend(tz, trip, &trend)) { |
601f3d42 ZR |
724 | /* |
725 | * compare the current temperature and previous temperature | |
726 | * to get the thermal trend, if no special requirement | |
727 | */ | |
728 | if (tz->temperature > tz->last_temperature) | |
729 | trend = THERMAL_TREND_RAISING; | |
730 | else if (tz->temperature < tz->last_temperature) | |
731 | trend = THERMAL_TREND_DROPPING; | |
732 | else | |
733 | trend = THERMAL_TREND_STABLE; | |
734 | } | |
735 | ||
b1569e99 MG |
736 | /* |
737 | * Above Trip? | |
738 | * ----------- | |
739 | * Calculate the thermal trend (using the passive cooling equation) | |
740 | * and modify the performance limit for all passive cooling devices | |
741 | * accordingly. Note that we assume symmetry. | |
742 | */ | |
743 | if (temp >= trip_temp) { | |
744 | tz->passive = true; | |
745 | ||
b1569e99 | 746 | /* Heating up? */ |
1b7ddb84 | 747 | if (trend == THERMAL_TREND_RAISING) { |
b1569e99 MG |
748 | list_for_each_entry(instance, &tz->cooling_devices, |
749 | node) { | |
750 | if (instance->trip != trip) | |
751 | continue; | |
752 | cdev = instance->cdev; | |
753 | cdev->ops->get_cur_state(cdev, &state); | |
754 | cdev->ops->get_max_state(cdev, &max_state); | |
755 | if (state++ < max_state) | |
756 | cdev->ops->set_cur_state(cdev, state); | |
757 | } | |
1b7ddb84 | 758 | } else if (trend == THERMAL_TREND_DROPPING) { /* Cooling off? */ |
b1569e99 MG |
759 | list_for_each_entry(instance, &tz->cooling_devices, |
760 | node) { | |
761 | if (instance->trip != trip) | |
762 | continue; | |
763 | cdev = instance->cdev; | |
764 | cdev->ops->get_cur_state(cdev, &state); | |
765 | cdev->ops->get_max_state(cdev, &max_state); | |
766 | if (state > 0) | |
767 | cdev->ops->set_cur_state(cdev, --state); | |
768 | } | |
769 | } | |
770 | return; | |
771 | } | |
772 | ||
773 | /* | |
774 | * Below Trip? | |
775 | * ----------- | |
776 | * Implement passive cooling hysteresis to slowly increase performance | |
777 | * and avoid thrashing around the passive trip point. Note that we | |
778 | * assume symmetry. | |
779 | */ | |
780 | list_for_each_entry(instance, &tz->cooling_devices, node) { | |
781 | if (instance->trip != trip) | |
782 | continue; | |
783 | cdev = instance->cdev; | |
784 | cdev->ops->get_cur_state(cdev, &state); | |
785 | cdev->ops->get_max_state(cdev, &max_state); | |
786 | if (state > 0) | |
787 | cdev->ops->set_cur_state(cdev, --state); | |
788 | if (state == 0) | |
789 | tz->passive = false; | |
790 | } | |
791 | } | |
792 | ||
793 | static void thermal_zone_device_check(struct work_struct *work) | |
794 | { | |
795 | struct thermal_zone_device *tz = container_of(work, struct | |
796 | thermal_zone_device, | |
797 | poll_queue.work); | |
798 | thermal_zone_device_update(tz); | |
799 | } | |
e68b16ab | 800 | |
203d3d4a ZR |
801 | /** |
802 | * thermal_zone_bind_cooling_device - bind a cooling device to a thermal zone | |
203d3d4a ZR |
803 | * @tz: thermal zone device |
804 | * @trip: indicates which trip point the cooling devices is | |
805 | * associated with in this thermal zone. | |
806 | * @cdev: thermal cooling device | |
543a9561 LB |
807 | * |
808 | * This function is usually called in the thermal zone device .bind callback. | |
203d3d4a ZR |
809 | */ |
810 | int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, | |
811 | int trip, | |
9d99842f ZR |
812 | struct thermal_cooling_device *cdev, |
813 | unsigned long upper, unsigned long lower) | |
203d3d4a ZR |
814 | { |
815 | struct thermal_cooling_device_instance *dev; | |
816 | struct thermal_cooling_device_instance *pos; | |
c7516709 TS |
817 | struct thermal_zone_device *pos1; |
818 | struct thermal_cooling_device *pos2; | |
74051ba5 | 819 | unsigned long max_state; |
203d3d4a ZR |
820 | int result; |
821 | ||
543a9561 | 822 | if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE)) |
203d3d4a ZR |
823 | return -EINVAL; |
824 | ||
c7516709 TS |
825 | list_for_each_entry(pos1, &thermal_tz_list, node) { |
826 | if (pos1 == tz) | |
827 | break; | |
828 | } | |
829 | list_for_each_entry(pos2, &thermal_cdev_list, node) { | |
830 | if (pos2 == cdev) | |
831 | break; | |
832 | } | |
833 | ||
834 | if (tz != pos1 || cdev != pos2) | |
203d3d4a ZR |
835 | return -EINVAL; |
836 | ||
9d99842f ZR |
837 | cdev->ops->get_max_state(cdev, &max_state); |
838 | ||
839 | /* lower default 0, upper default max_state */ | |
840 | lower = lower == THERMAL_NO_LIMIT ? 0 : lower; | |
841 | upper = upper == THERMAL_NO_LIMIT ? max_state : upper; | |
842 | ||
843 | if (lower > upper || upper > max_state) | |
844 | return -EINVAL; | |
845 | ||
203d3d4a ZR |
846 | dev = |
847 | kzalloc(sizeof(struct thermal_cooling_device_instance), GFP_KERNEL); | |
848 | if (!dev) | |
849 | return -ENOMEM; | |
850 | dev->tz = tz; | |
851 | dev->cdev = cdev; | |
852 | dev->trip = trip; | |
9d99842f ZR |
853 | dev->upper = upper; |
854 | dev->lower = lower; | |
74051ba5 | 855 | |
203d3d4a ZR |
856 | result = get_idr(&tz->idr, &tz->lock, &dev->id); |
857 | if (result) | |
858 | goto free_mem; | |
859 | ||
860 | sprintf(dev->name, "cdev%d", dev->id); | |
861 | result = | |
862 | sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev->name); | |
863 | if (result) | |
864 | goto release_idr; | |
865 | ||
866 | sprintf(dev->attr_name, "cdev%d_trip_point", dev->id); | |
975f8c56 | 867 | sysfs_attr_init(&dev->attr.attr); |
203d3d4a ZR |
868 | dev->attr.attr.name = dev->attr_name; |
869 | dev->attr.attr.mode = 0444; | |
870 | dev->attr.show = thermal_cooling_device_trip_point_show; | |
871 | result = device_create_file(&tz->device, &dev->attr); | |
872 | if (result) | |
873 | goto remove_symbol_link; | |
874 | ||
875 | mutex_lock(&tz->lock); | |
876 | list_for_each_entry(pos, &tz->cooling_devices, node) | |
877 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { | |
878 | result = -EEXIST; | |
879 | break; | |
880 | } | |
881 | if (!result) | |
882 | list_add_tail(&dev->node, &tz->cooling_devices); | |
883 | mutex_unlock(&tz->lock); | |
884 | ||
885 | if (!result) | |
886 | return 0; | |
887 | ||
888 | device_remove_file(&tz->device, &dev->attr); | |
caca8b80 | 889 | remove_symbol_link: |
203d3d4a | 890 | sysfs_remove_link(&tz->device.kobj, dev->name); |
caca8b80 | 891 | release_idr: |
203d3d4a | 892 | release_idr(&tz->idr, &tz->lock, dev->id); |
caca8b80 | 893 | free_mem: |
203d3d4a ZR |
894 | kfree(dev); |
895 | return result; | |
896 | } | |
897 | EXPORT_SYMBOL(thermal_zone_bind_cooling_device); | |
898 | ||
899 | /** | |
900 | * thermal_zone_unbind_cooling_device - unbind a cooling device from a thermal zone | |
203d3d4a ZR |
901 | * @tz: thermal zone device |
902 | * @trip: indicates which trip point the cooling devices is | |
903 | * associated with in this thermal zone. | |
904 | * @cdev: thermal cooling device | |
543a9561 LB |
905 | * |
906 | * This function is usually called in the thermal zone device .unbind callback. | |
203d3d4a ZR |
907 | */ |
908 | int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz, | |
909 | int trip, | |
910 | struct thermal_cooling_device *cdev) | |
911 | { | |
912 | struct thermal_cooling_device_instance *pos, *next; | |
913 | ||
914 | mutex_lock(&tz->lock); | |
915 | list_for_each_entry_safe(pos, next, &tz->cooling_devices, node) { | |
543a9561 | 916 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
203d3d4a ZR |
917 | list_del(&pos->node); |
918 | mutex_unlock(&tz->lock); | |
919 | goto unbind; | |
920 | } | |
921 | } | |
922 | mutex_unlock(&tz->lock); | |
923 | ||
924 | return -ENODEV; | |
925 | ||
caca8b80 | 926 | unbind: |
203d3d4a ZR |
927 | device_remove_file(&tz->device, &pos->attr); |
928 | sysfs_remove_link(&tz->device.kobj, pos->name); | |
929 | release_idr(&tz->idr, &tz->lock, pos->id); | |
930 | kfree(pos); | |
931 | return 0; | |
932 | } | |
933 | EXPORT_SYMBOL(thermal_zone_unbind_cooling_device); | |
934 | ||
935 | static void thermal_release(struct device *dev) | |
936 | { | |
937 | struct thermal_zone_device *tz; | |
938 | struct thermal_cooling_device *cdev; | |
939 | ||
caca8b80 JP |
940 | if (!strncmp(dev_name(dev), "thermal_zone", |
941 | sizeof("thermal_zone") - 1)) { | |
203d3d4a ZR |
942 | tz = to_thermal_zone(dev); |
943 | kfree(tz); | |
944 | } else { | |
945 | cdev = to_cooling_device(dev); | |
946 | kfree(cdev); | |
947 | } | |
948 | } | |
949 | ||
950 | static struct class thermal_class = { | |
951 | .name = "thermal", | |
952 | .dev_release = thermal_release, | |
953 | }; | |
954 | ||
955 | /** | |
956 | * thermal_cooling_device_register - register a new thermal cooling device | |
957 | * @type: the thermal cooling device type. | |
958 | * @devdata: device private data. | |
959 | * @ops: standard thermal cooling devices callbacks. | |
960 | */ | |
caca8b80 JP |
961 | struct thermal_cooling_device * |
962 | thermal_cooling_device_register(char *type, void *devdata, | |
963 | const struct thermal_cooling_device_ops *ops) | |
203d3d4a ZR |
964 | { |
965 | struct thermal_cooling_device *cdev; | |
966 | struct thermal_zone_device *pos; | |
967 | int result; | |
968 | ||
969 | if (strlen(type) >= THERMAL_NAME_LENGTH) | |
3e6fda5c | 970 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
971 | |
972 | if (!ops || !ops->get_max_state || !ops->get_cur_state || | |
543a9561 | 973 | !ops->set_cur_state) |
3e6fda5c | 974 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
975 | |
976 | cdev = kzalloc(sizeof(struct thermal_cooling_device), GFP_KERNEL); | |
977 | if (!cdev) | |
3e6fda5c | 978 | return ERR_PTR(-ENOMEM); |
203d3d4a ZR |
979 | |
980 | result = get_idr(&thermal_cdev_idr, &thermal_idr_lock, &cdev->id); | |
981 | if (result) { | |
982 | kfree(cdev); | |
3e6fda5c | 983 | return ERR_PTR(result); |
203d3d4a ZR |
984 | } |
985 | ||
986 | strcpy(cdev->type, type); | |
987 | cdev->ops = ops; | |
988 | cdev->device.class = &thermal_class; | |
989 | cdev->devdata = devdata; | |
354655ea | 990 | dev_set_name(&cdev->device, "cooling_device%d", cdev->id); |
203d3d4a ZR |
991 | result = device_register(&cdev->device); |
992 | if (result) { | |
993 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
994 | kfree(cdev); | |
3e6fda5c | 995 | return ERR_PTR(result); |
203d3d4a ZR |
996 | } |
997 | ||
998 | /* sys I/F */ | |
999 | if (type) { | |
543a9561 | 1000 | result = device_create_file(&cdev->device, &dev_attr_cdev_type); |
203d3d4a ZR |
1001 | if (result) |
1002 | goto unregister; | |
1003 | } | |
1004 | ||
1005 | result = device_create_file(&cdev->device, &dev_attr_max_state); | |
1006 | if (result) | |
1007 | goto unregister; | |
1008 | ||
1009 | result = device_create_file(&cdev->device, &dev_attr_cur_state); | |
1010 | if (result) | |
1011 | goto unregister; | |
1012 | ||
1013 | mutex_lock(&thermal_list_lock); | |
1014 | list_add(&cdev->node, &thermal_cdev_list); | |
1015 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
1016 | if (!pos->ops->bind) | |
1017 | continue; | |
1018 | result = pos->ops->bind(pos, cdev); | |
1019 | if (result) | |
1020 | break; | |
1021 | ||
1022 | } | |
1023 | mutex_unlock(&thermal_list_lock); | |
1024 | ||
1025 | if (!result) | |
1026 | return cdev; | |
1027 | ||
caca8b80 | 1028 | unregister: |
203d3d4a ZR |
1029 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); |
1030 | device_unregister(&cdev->device); | |
3e6fda5c | 1031 | return ERR_PTR(result); |
203d3d4a ZR |
1032 | } |
1033 | EXPORT_SYMBOL(thermal_cooling_device_register); | |
1034 | ||
1035 | /** | |
1036 | * thermal_cooling_device_unregister - removes the registered thermal cooling device | |
203d3d4a ZR |
1037 | * @cdev: the thermal cooling device to remove. |
1038 | * | |
1039 | * thermal_cooling_device_unregister() must be called when the device is no | |
1040 | * longer needed. | |
1041 | */ | |
1042 | void thermal_cooling_device_unregister(struct | |
1043 | thermal_cooling_device | |
1044 | *cdev) | |
1045 | { | |
1046 | struct thermal_zone_device *tz; | |
1047 | struct thermal_cooling_device *pos = NULL; | |
1048 | ||
1049 | if (!cdev) | |
1050 | return; | |
1051 | ||
1052 | mutex_lock(&thermal_list_lock); | |
1053 | list_for_each_entry(pos, &thermal_cdev_list, node) | |
1054 | if (pos == cdev) | |
1055 | break; | |
1056 | if (pos != cdev) { | |
1057 | /* thermal cooling device not found */ | |
1058 | mutex_unlock(&thermal_list_lock); | |
1059 | return; | |
1060 | } | |
1061 | list_del(&cdev->node); | |
1062 | list_for_each_entry(tz, &thermal_tz_list, node) { | |
1063 | if (!tz->ops->unbind) | |
1064 | continue; | |
1065 | tz->ops->unbind(tz, cdev); | |
1066 | } | |
1067 | mutex_unlock(&thermal_list_lock); | |
1068 | if (cdev->type[0]) | |
543a9561 | 1069 | device_remove_file(&cdev->device, &dev_attr_cdev_type); |
203d3d4a ZR |
1070 | device_remove_file(&cdev->device, &dev_attr_max_state); |
1071 | device_remove_file(&cdev->device, &dev_attr_cur_state); | |
1072 | ||
1073 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
1074 | device_unregister(&cdev->device); | |
1075 | return; | |
1076 | } | |
1077 | EXPORT_SYMBOL(thermal_cooling_device_unregister); | |
1078 | ||
4ae46bef ZR |
1079 | /* |
1080 | * Cooling algorithm for active trip points | |
1081 | * | |
1082 | * 1. if the temperature is higher than a trip point, | |
1083 | * a. if the trend is THERMAL_TREND_RAISING, use higher cooling | |
1084 | * state for this trip point | |
1085 | * b. if the trend is THERMAL_TREND_DROPPING, use lower cooling | |
1086 | * state for this trip point | |
1087 | * | |
1088 | * 2. if the temperature is lower than a trip point, use lower | |
1089 | * cooling state for this trip point | |
1090 | * | |
1091 | * Note that this behaves the same as the previous passive cooling | |
1092 | * algorithm. | |
1093 | */ | |
1094 | ||
1095 | static void thermal_zone_trip_update(struct thermal_zone_device *tz, | |
1096 | int trip, long temp) | |
1097 | { | |
1098 | struct thermal_cooling_device_instance *instance; | |
1099 | struct thermal_cooling_device *cdev = NULL; | |
1100 | unsigned long cur_state, max_state; | |
1101 | long trip_temp; | |
1102 | enum thermal_trend trend; | |
1103 | ||
1104 | tz->ops->get_trip_temp(tz, trip, &trip_temp); | |
1105 | ||
1106 | if (!tz->ops->get_trend || tz->ops->get_trend(tz, trip, &trend)) { | |
1107 | /* | |
1108 | * compare the current temperature and previous temperature | |
1109 | * to get the thermal trend, if no special requirement | |
1110 | */ | |
1111 | if (tz->temperature > tz->last_temperature) | |
1112 | trend = THERMAL_TREND_RAISING; | |
1113 | else if (tz->temperature < tz->last_temperature) | |
1114 | trend = THERMAL_TREND_DROPPING; | |
1115 | else | |
1116 | trend = THERMAL_TREND_STABLE; | |
1117 | } | |
1118 | ||
1119 | if (temp >= trip_temp) { | |
1120 | list_for_each_entry(instance, &tz->cooling_devices, node) { | |
1121 | if (instance->trip != trip) | |
1122 | continue; | |
1123 | ||
1124 | cdev = instance->cdev; | |
1125 | ||
1126 | cdev->ops->get_cur_state(cdev, &cur_state); | |
1127 | cdev->ops->get_max_state(cdev, &max_state); | |
1128 | ||
1129 | if (trend == THERMAL_TREND_RAISING) { | |
1130 | cur_state = cur_state < instance->upper ? | |
1131 | (cur_state + 1) : instance->upper; | |
1132 | } else if (trend == THERMAL_TREND_DROPPING) { | |
1133 | cur_state = cur_state > instance->lower ? | |
1134 | (cur_state - 1) : instance->lower; | |
1135 | } | |
1136 | cdev->ops->set_cur_state(cdev, cur_state); | |
1137 | } | |
1138 | } else { /* below trip */ | |
1139 | list_for_each_entry(instance, &tz->cooling_devices, node) { | |
1140 | if (instance->trip != trip) | |
1141 | continue; | |
1142 | ||
1143 | cdev = instance->cdev; | |
1144 | cdev->ops->get_cur_state(cdev, &cur_state); | |
1145 | ||
1146 | cur_state = cur_state > instance->lower ? | |
1147 | (cur_state - 1) : instance->lower; | |
1148 | cdev->ops->set_cur_state(cdev, cur_state); | |
1149 | } | |
1150 | } | |
1151 | ||
1152 | return; | |
1153 | } | |
b1569e99 MG |
1154 | /** |
1155 | * thermal_zone_device_update - force an update of a thermal zone's state | |
1156 | * @ttz: the thermal zone to update | |
1157 | */ | |
1158 | ||
1159 | void thermal_zone_device_update(struct thermal_zone_device *tz) | |
1160 | { | |
1161 | int count, ret = 0; | |
1162 | long temp, trip_temp; | |
1163 | enum thermal_trip_type trip_type; | |
b1569e99 MG |
1164 | |
1165 | mutex_lock(&tz->lock); | |
1166 | ||
0d288162 MB |
1167 | if (tz->ops->get_temp(tz, &temp)) { |
1168 | /* get_temp failed - retry it later */ | |
c5a01dd5 | 1169 | pr_warn("failed to read out thermal zone %d\n", tz->id); |
0d288162 MB |
1170 | goto leave; |
1171 | } | |
b1569e99 | 1172 | |
601f3d42 ZR |
1173 | tz->last_temperature = tz->temperature; |
1174 | tz->temperature = temp; | |
1175 | ||
b1569e99 MG |
1176 | for (count = 0; count < tz->trips; count++) { |
1177 | tz->ops->get_trip_type(tz, count, &trip_type); | |
1178 | tz->ops->get_trip_temp(tz, count, &trip_temp); | |
1179 | ||
1180 | switch (trip_type) { | |
1181 | case THERMAL_TRIP_CRITICAL: | |
29321357 | 1182 | if (temp >= trip_temp) { |
b1569e99 MG |
1183 | if (tz->ops->notify) |
1184 | ret = tz->ops->notify(tz, count, | |
1185 | trip_type); | |
1186 | if (!ret) { | |
c5a01dd5 JP |
1187 | pr_emerg("Critical temperature reached (%ld C), shutting down\n", |
1188 | temp/1000); | |
b1569e99 MG |
1189 | orderly_poweroff(true); |
1190 | } | |
1191 | } | |
1192 | break; | |
1193 | case THERMAL_TRIP_HOT: | |
29321357 | 1194 | if (temp >= trip_temp) |
b1569e99 MG |
1195 | if (tz->ops->notify) |
1196 | tz->ops->notify(tz, count, trip_type); | |
1197 | break; | |
1198 | case THERMAL_TRIP_ACTIVE: | |
4ae46bef | 1199 | thermal_zone_trip_update(tz, count, temp); |
b1569e99 MG |
1200 | break; |
1201 | case THERMAL_TRIP_PASSIVE: | |
29321357 | 1202 | if (temp >= trip_temp || tz->passive) |
b1569e99 MG |
1203 | thermal_zone_device_passive(tz, temp, |
1204 | trip_temp, count); | |
1205 | break; | |
1206 | } | |
1207 | } | |
03a971a2 MG |
1208 | |
1209 | if (tz->forced_passive) | |
1210 | thermal_zone_device_passive(tz, temp, tz->forced_passive, | |
1211 | THERMAL_TRIPS_NONE); | |
1212 | ||
caca8b80 | 1213 | leave: |
b1569e99 MG |
1214 | if (tz->passive) |
1215 | thermal_zone_device_set_polling(tz, tz->passive_delay); | |
1216 | else if (tz->polling_delay) | |
1217 | thermal_zone_device_set_polling(tz, tz->polling_delay); | |
3767cb54 FP |
1218 | else |
1219 | thermal_zone_device_set_polling(tz, 0); | |
b1569e99 MG |
1220 | mutex_unlock(&tz->lock); |
1221 | } | |
1222 | EXPORT_SYMBOL(thermal_zone_device_update); | |
1223 | ||
c56f5c03 D |
1224 | /** |
1225 | * create_trip_attrs - create attributes for trip points | |
1226 | * @tz: the thermal zone device | |
1227 | * @mask: Writeable trip point bitmap. | |
1228 | */ | |
1229 | static int create_trip_attrs(struct thermal_zone_device *tz, int mask) | |
1230 | { | |
1231 | int indx; | |
27365a6c | 1232 | int size = sizeof(struct thermal_attr) * tz->trips; |
c56f5c03 | 1233 | |
27365a6c | 1234 | tz->trip_type_attrs = kzalloc(size, GFP_KERNEL); |
c56f5c03 D |
1235 | if (!tz->trip_type_attrs) |
1236 | return -ENOMEM; | |
1237 | ||
27365a6c | 1238 | tz->trip_temp_attrs = kzalloc(size, GFP_KERNEL); |
c56f5c03 D |
1239 | if (!tz->trip_temp_attrs) { |
1240 | kfree(tz->trip_type_attrs); | |
1241 | return -ENOMEM; | |
1242 | } | |
1243 | ||
27365a6c D |
1244 | if (tz->ops->get_trip_hyst) { |
1245 | tz->trip_hyst_attrs = kzalloc(size, GFP_KERNEL); | |
1246 | if (!tz->trip_hyst_attrs) { | |
1247 | kfree(tz->trip_type_attrs); | |
1248 | kfree(tz->trip_temp_attrs); | |
1249 | return -ENOMEM; | |
1250 | } | |
1251 | } | |
c56f5c03 | 1252 | |
27365a6c D |
1253 | |
1254 | for (indx = 0; indx < tz->trips; indx++) { | |
c56f5c03 D |
1255 | /* create trip type attribute */ |
1256 | snprintf(tz->trip_type_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1257 | "trip_point_%d_type", indx); | |
1258 | ||
1259 | sysfs_attr_init(&tz->trip_type_attrs[indx].attr.attr); | |
1260 | tz->trip_type_attrs[indx].attr.attr.name = | |
1261 | tz->trip_type_attrs[indx].name; | |
1262 | tz->trip_type_attrs[indx].attr.attr.mode = S_IRUGO; | |
1263 | tz->trip_type_attrs[indx].attr.show = trip_point_type_show; | |
1264 | ||
1265 | device_create_file(&tz->device, | |
1266 | &tz->trip_type_attrs[indx].attr); | |
1267 | ||
1268 | /* create trip temp attribute */ | |
1269 | snprintf(tz->trip_temp_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1270 | "trip_point_%d_temp", indx); | |
1271 | ||
1272 | sysfs_attr_init(&tz->trip_temp_attrs[indx].attr.attr); | |
1273 | tz->trip_temp_attrs[indx].attr.attr.name = | |
1274 | tz->trip_temp_attrs[indx].name; | |
1275 | tz->trip_temp_attrs[indx].attr.attr.mode = S_IRUGO; | |
1276 | tz->trip_temp_attrs[indx].attr.show = trip_point_temp_show; | |
1277 | if (mask & (1 << indx)) { | |
1278 | tz->trip_temp_attrs[indx].attr.attr.mode |= S_IWUSR; | |
1279 | tz->trip_temp_attrs[indx].attr.store = | |
1280 | trip_point_temp_store; | |
1281 | } | |
1282 | ||
1283 | device_create_file(&tz->device, | |
1284 | &tz->trip_temp_attrs[indx].attr); | |
27365a6c D |
1285 | |
1286 | /* create Optional trip hyst attribute */ | |
1287 | if (!tz->ops->get_trip_hyst) | |
1288 | continue; | |
1289 | snprintf(tz->trip_hyst_attrs[indx].name, THERMAL_NAME_LENGTH, | |
1290 | "trip_point_%d_hyst", indx); | |
1291 | ||
1292 | sysfs_attr_init(&tz->trip_hyst_attrs[indx].attr.attr); | |
1293 | tz->trip_hyst_attrs[indx].attr.attr.name = | |
1294 | tz->trip_hyst_attrs[indx].name; | |
1295 | tz->trip_hyst_attrs[indx].attr.attr.mode = S_IRUGO; | |
1296 | tz->trip_hyst_attrs[indx].attr.show = trip_point_hyst_show; | |
1297 | if (tz->ops->set_trip_hyst) { | |
1298 | tz->trip_hyst_attrs[indx].attr.attr.mode |= S_IWUSR; | |
1299 | tz->trip_hyst_attrs[indx].attr.store = | |
1300 | trip_point_hyst_store; | |
1301 | } | |
1302 | ||
1303 | device_create_file(&tz->device, | |
1304 | &tz->trip_hyst_attrs[indx].attr); | |
c56f5c03 D |
1305 | } |
1306 | return 0; | |
1307 | } | |
1308 | ||
1309 | static void remove_trip_attrs(struct thermal_zone_device *tz) | |
1310 | { | |
1311 | int indx; | |
1312 | ||
1313 | for (indx = 0; indx < tz->trips; indx++) { | |
1314 | device_remove_file(&tz->device, | |
1315 | &tz->trip_type_attrs[indx].attr); | |
1316 | device_remove_file(&tz->device, | |
1317 | &tz->trip_temp_attrs[indx].attr); | |
27365a6c D |
1318 | if (tz->ops->get_trip_hyst) |
1319 | device_remove_file(&tz->device, | |
1320 | &tz->trip_hyst_attrs[indx].attr); | |
c56f5c03 D |
1321 | } |
1322 | kfree(tz->trip_type_attrs); | |
1323 | kfree(tz->trip_temp_attrs); | |
27365a6c | 1324 | kfree(tz->trip_hyst_attrs); |
c56f5c03 D |
1325 | } |
1326 | ||
203d3d4a ZR |
1327 | /** |
1328 | * thermal_zone_device_register - register a new thermal zone device | |
1329 | * @type: the thermal zone device type | |
1330 | * @trips: the number of trip points the thermal zone support | |
c56f5c03 | 1331 | * @mask: a bit string indicating the writeablility of trip points |
203d3d4a ZR |
1332 | * @devdata: private device data |
1333 | * @ops: standard thermal zone device callbacks | |
b1569e99 MG |
1334 | * @passive_delay: number of milliseconds to wait between polls when |
1335 | * performing passive cooling | |
1336 | * @polling_delay: number of milliseconds to wait between polls when checking | |
1337 | * whether trip points have been crossed (0 for interrupt | |
1338 | * driven systems) | |
203d3d4a ZR |
1339 | * |
1340 | * thermal_zone_device_unregister() must be called when the device is no | |
1b7ddb84 | 1341 | * longer needed. The passive cooling depends on the .get_trend() return value. |
203d3d4a | 1342 | */ |
4b1bf587 | 1343 | struct thermal_zone_device *thermal_zone_device_register(const char *type, |
c56f5c03 | 1344 | int trips, int mask, void *devdata, |
5b275ce2 | 1345 | const struct thermal_zone_device_ops *ops, |
1b7ddb84 | 1346 | int passive_delay, int polling_delay) |
203d3d4a ZR |
1347 | { |
1348 | struct thermal_zone_device *tz; | |
1349 | struct thermal_cooling_device *pos; | |
03a971a2 | 1350 | enum thermal_trip_type trip_type; |
203d3d4a ZR |
1351 | int result; |
1352 | int count; | |
03a971a2 | 1353 | int passive = 0; |
203d3d4a ZR |
1354 | |
1355 | if (strlen(type) >= THERMAL_NAME_LENGTH) | |
3e6fda5c | 1356 | return ERR_PTR(-EINVAL); |
203d3d4a | 1357 | |
c56f5c03 | 1358 | if (trips > THERMAL_MAX_TRIPS || trips < 0 || mask >> trips) |
3e6fda5c | 1359 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1360 | |
1361 | if (!ops || !ops->get_temp) | |
3e6fda5c | 1362 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1363 | |
1364 | tz = kzalloc(sizeof(struct thermal_zone_device), GFP_KERNEL); | |
1365 | if (!tz) | |
3e6fda5c | 1366 | return ERR_PTR(-ENOMEM); |
203d3d4a ZR |
1367 | |
1368 | INIT_LIST_HEAD(&tz->cooling_devices); | |
1369 | idr_init(&tz->idr); | |
1370 | mutex_init(&tz->lock); | |
1371 | result = get_idr(&thermal_tz_idr, &thermal_idr_lock, &tz->id); | |
1372 | if (result) { | |
1373 | kfree(tz); | |
3e6fda5c | 1374 | return ERR_PTR(result); |
203d3d4a ZR |
1375 | } |
1376 | ||
1377 | strcpy(tz->type, type); | |
1378 | tz->ops = ops; | |
1379 | tz->device.class = &thermal_class; | |
1380 | tz->devdata = devdata; | |
1381 | tz->trips = trips; | |
b1569e99 MG |
1382 | tz->passive_delay = passive_delay; |
1383 | tz->polling_delay = polling_delay; | |
1384 | ||
354655ea | 1385 | dev_set_name(&tz->device, "thermal_zone%d", tz->id); |
203d3d4a ZR |
1386 | result = device_register(&tz->device); |
1387 | if (result) { | |
1388 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); | |
1389 | kfree(tz); | |
3e6fda5c | 1390 | return ERR_PTR(result); |
203d3d4a ZR |
1391 | } |
1392 | ||
1393 | /* sys I/F */ | |
1394 | if (type) { | |
1395 | result = device_create_file(&tz->device, &dev_attr_type); | |
1396 | if (result) | |
1397 | goto unregister; | |
1398 | } | |
1399 | ||
1400 | result = device_create_file(&tz->device, &dev_attr_temp); | |
1401 | if (result) | |
1402 | goto unregister; | |
1403 | ||
1404 | if (ops->get_mode) { | |
1405 | result = device_create_file(&tz->device, &dev_attr_mode); | |
1406 | if (result) | |
1407 | goto unregister; | |
1408 | } | |
1409 | ||
c56f5c03 D |
1410 | result = create_trip_attrs(tz, mask); |
1411 | if (result) | |
1412 | goto unregister; | |
1413 | ||
203d3d4a | 1414 | for (count = 0; count < trips; count++) { |
03a971a2 MG |
1415 | tz->ops->get_trip_type(tz, count, &trip_type); |
1416 | if (trip_type == THERMAL_TRIP_PASSIVE) | |
1417 | passive = 1; | |
203d3d4a ZR |
1418 | } |
1419 | ||
03a971a2 MG |
1420 | if (!passive) |
1421 | result = device_create_file(&tz->device, | |
1422 | &dev_attr_passive); | |
1423 | ||
1424 | if (result) | |
1425 | goto unregister; | |
1426 | ||
e68b16ab ZR |
1427 | result = thermal_add_hwmon_sysfs(tz); |
1428 | if (result) | |
1429 | goto unregister; | |
1430 | ||
203d3d4a ZR |
1431 | mutex_lock(&thermal_list_lock); |
1432 | list_add_tail(&tz->node, &thermal_tz_list); | |
1433 | if (ops->bind) | |
1434 | list_for_each_entry(pos, &thermal_cdev_list, node) { | |
543a9561 LB |
1435 | result = ops->bind(tz, pos); |
1436 | if (result) | |
1437 | break; | |
203d3d4a ZR |
1438 | } |
1439 | mutex_unlock(&thermal_list_lock); | |
1440 | ||
b1569e99 MG |
1441 | INIT_DELAYED_WORK(&(tz->poll_queue), thermal_zone_device_check); |
1442 | ||
1443 | thermal_zone_device_update(tz); | |
1444 | ||
203d3d4a ZR |
1445 | if (!result) |
1446 | return tz; | |
1447 | ||
caca8b80 | 1448 | unregister: |
203d3d4a ZR |
1449 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1450 | device_unregister(&tz->device); | |
3e6fda5c | 1451 | return ERR_PTR(result); |
203d3d4a ZR |
1452 | } |
1453 | EXPORT_SYMBOL(thermal_zone_device_register); | |
1454 | ||
1455 | /** | |
1456 | * thermal_device_unregister - removes the registered thermal zone device | |
203d3d4a ZR |
1457 | * @tz: the thermal zone device to remove |
1458 | */ | |
1459 | void thermal_zone_device_unregister(struct thermal_zone_device *tz) | |
1460 | { | |
1461 | struct thermal_cooling_device *cdev; | |
1462 | struct thermal_zone_device *pos = NULL; | |
203d3d4a ZR |
1463 | |
1464 | if (!tz) | |
1465 | return; | |
1466 | ||
1467 | mutex_lock(&thermal_list_lock); | |
1468 | list_for_each_entry(pos, &thermal_tz_list, node) | |
1469 | if (pos == tz) | |
1470 | break; | |
1471 | if (pos != tz) { | |
1472 | /* thermal zone device not found */ | |
1473 | mutex_unlock(&thermal_list_lock); | |
1474 | return; | |
1475 | } | |
1476 | list_del(&tz->node); | |
1477 | if (tz->ops->unbind) | |
1478 | list_for_each_entry(cdev, &thermal_cdev_list, node) | |
1479 | tz->ops->unbind(tz, cdev); | |
1480 | mutex_unlock(&thermal_list_lock); | |
1481 | ||
b1569e99 MG |
1482 | thermal_zone_device_set_polling(tz, 0); |
1483 | ||
203d3d4a ZR |
1484 | if (tz->type[0]) |
1485 | device_remove_file(&tz->device, &dev_attr_type); | |
1486 | device_remove_file(&tz->device, &dev_attr_temp); | |
1487 | if (tz->ops->get_mode) | |
1488 | device_remove_file(&tz->device, &dev_attr_mode); | |
c56f5c03 | 1489 | remove_trip_attrs(tz); |
203d3d4a | 1490 | |
e68b16ab | 1491 | thermal_remove_hwmon_sysfs(tz); |
203d3d4a ZR |
1492 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1493 | idr_destroy(&tz->idr); | |
1494 | mutex_destroy(&tz->lock); | |
1495 | device_unregister(&tz->device); | |
1496 | return; | |
1497 | } | |
1498 | EXPORT_SYMBOL(thermal_zone_device_unregister); | |
1499 | ||
af06216a RW |
1500 | #ifdef CONFIG_NET |
1501 | static struct genl_family thermal_event_genl_family = { | |
1502 | .id = GENL_ID_GENERATE, | |
1503 | .name = THERMAL_GENL_FAMILY_NAME, | |
1504 | .version = THERMAL_GENL_VERSION, | |
1505 | .maxattr = THERMAL_GENL_ATTR_MAX, | |
1506 | }; | |
1507 | ||
1508 | static struct genl_multicast_group thermal_event_mcgrp = { | |
1509 | .name = THERMAL_GENL_MCAST_GROUP_NAME, | |
1510 | }; | |
1511 | ||
2d58d7ea | 1512 | int thermal_generate_netlink_event(u32 orig, enum events event) |
4cb18728 D |
1513 | { |
1514 | struct sk_buff *skb; | |
1515 | struct nlattr *attr; | |
1516 | struct thermal_genl_event *thermal_event; | |
1517 | void *msg_header; | |
1518 | int size; | |
1519 | int result; | |
b11de07c | 1520 | static unsigned int thermal_event_seqnum; |
4cb18728 D |
1521 | |
1522 | /* allocate memory */ | |
886ee546 JP |
1523 | size = nla_total_size(sizeof(struct thermal_genl_event)) + |
1524 | nla_total_size(0); | |
4cb18728 D |
1525 | |
1526 | skb = genlmsg_new(size, GFP_ATOMIC); | |
1527 | if (!skb) | |
1528 | return -ENOMEM; | |
1529 | ||
1530 | /* add the genetlink message header */ | |
1531 | msg_header = genlmsg_put(skb, 0, thermal_event_seqnum++, | |
1532 | &thermal_event_genl_family, 0, | |
1533 | THERMAL_GENL_CMD_EVENT); | |
1534 | if (!msg_header) { | |
1535 | nlmsg_free(skb); | |
1536 | return -ENOMEM; | |
1537 | } | |
1538 | ||
1539 | /* fill the data */ | |
886ee546 JP |
1540 | attr = nla_reserve(skb, THERMAL_GENL_ATTR_EVENT, |
1541 | sizeof(struct thermal_genl_event)); | |
4cb18728 D |
1542 | |
1543 | if (!attr) { | |
1544 | nlmsg_free(skb); | |
1545 | return -EINVAL; | |
1546 | } | |
1547 | ||
1548 | thermal_event = nla_data(attr); | |
1549 | if (!thermal_event) { | |
1550 | nlmsg_free(skb); | |
1551 | return -EINVAL; | |
1552 | } | |
1553 | ||
1554 | memset(thermal_event, 0, sizeof(struct thermal_genl_event)); | |
1555 | ||
1556 | thermal_event->orig = orig; | |
1557 | thermal_event->event = event; | |
1558 | ||
1559 | /* send multicast genetlink message */ | |
1560 | result = genlmsg_end(skb, msg_header); | |
1561 | if (result < 0) { | |
1562 | nlmsg_free(skb); | |
1563 | return result; | |
1564 | } | |
1565 | ||
1566 | result = genlmsg_multicast(skb, 0, thermal_event_mcgrp.id, GFP_ATOMIC); | |
1567 | if (result) | |
c5a01dd5 | 1568 | pr_info("failed to send netlink event:%d\n", result); |
4cb18728 D |
1569 | |
1570 | return result; | |
1571 | } | |
2d58d7ea | 1572 | EXPORT_SYMBOL(thermal_generate_netlink_event); |
4cb18728 D |
1573 | |
1574 | static int genetlink_init(void) | |
1575 | { | |
1576 | int result; | |
1577 | ||
1578 | result = genl_register_family(&thermal_event_genl_family); | |
1579 | if (result) | |
1580 | return result; | |
1581 | ||
1582 | result = genl_register_mc_group(&thermal_event_genl_family, | |
1583 | &thermal_event_mcgrp); | |
1584 | if (result) | |
1585 | genl_unregister_family(&thermal_event_genl_family); | |
1586 | return result; | |
1587 | } | |
1588 | ||
af06216a RW |
1589 | static void genetlink_exit(void) |
1590 | { | |
1591 | genl_unregister_family(&thermal_event_genl_family); | |
1592 | } | |
1593 | #else /* !CONFIG_NET */ | |
1594 | static inline int genetlink_init(void) { return 0; } | |
1595 | static inline void genetlink_exit(void) {} | |
1596 | #endif /* !CONFIG_NET */ | |
1597 | ||
203d3d4a ZR |
1598 | static int __init thermal_init(void) |
1599 | { | |
1600 | int result = 0; | |
1601 | ||
1602 | result = class_register(&thermal_class); | |
1603 | if (result) { | |
1604 | idr_destroy(&thermal_tz_idr); | |
1605 | idr_destroy(&thermal_cdev_idr); | |
1606 | mutex_destroy(&thermal_idr_lock); | |
1607 | mutex_destroy(&thermal_list_lock); | |
1608 | } | |
4cb18728 | 1609 | result = genetlink_init(); |
203d3d4a ZR |
1610 | return result; |
1611 | } | |
1612 | ||
1613 | static void __exit thermal_exit(void) | |
1614 | { | |
1615 | class_unregister(&thermal_class); | |
1616 | idr_destroy(&thermal_tz_idr); | |
1617 | idr_destroy(&thermal_cdev_idr); | |
1618 | mutex_destroy(&thermal_idr_lock); | |
1619 | mutex_destroy(&thermal_list_lock); | |
4cb18728 | 1620 | genetlink_exit(); |
203d3d4a ZR |
1621 | } |
1622 | ||
4cb18728 | 1623 | fs_initcall(thermal_init); |
203d3d4a | 1624 | module_exit(thermal_exit); |