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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 | ||
26 | #include <linux/module.h> | |
27 | #include <linux/device.h> | |
28 | #include <linux/err.h> | |
5a0e3ad6 | 29 | #include <linux/slab.h> |
203d3d4a ZR |
30 | #include <linux/kdev_t.h> |
31 | #include <linux/idr.h> | |
32 | #include <linux/thermal.h> | |
33 | #include <linux/spinlock.h> | |
b1569e99 | 34 | #include <linux/reboot.h> |
4cb18728 D |
35 | #include <net/netlink.h> |
36 | #include <net/genetlink.h> | |
203d3d4a | 37 | |
63c4ec90 | 38 | MODULE_AUTHOR("Zhang Rui"); |
203d3d4a ZR |
39 | MODULE_DESCRIPTION("Generic thermal management sysfs support"); |
40 | MODULE_LICENSE("GPL"); | |
41 | ||
42 | #define PREFIX "Thermal: " | |
43 | ||
44 | struct thermal_cooling_device_instance { | |
45 | int id; | |
46 | char name[THERMAL_NAME_LENGTH]; | |
47 | struct thermal_zone_device *tz; | |
48 | struct thermal_cooling_device *cdev; | |
49 | int trip; | |
50 | char attr_name[THERMAL_NAME_LENGTH]; | |
51 | struct device_attribute attr; | |
52 | struct list_head node; | |
53 | }; | |
54 | ||
55 | static DEFINE_IDR(thermal_tz_idr); | |
56 | static DEFINE_IDR(thermal_cdev_idr); | |
57 | static DEFINE_MUTEX(thermal_idr_lock); | |
58 | ||
59 | static LIST_HEAD(thermal_tz_list); | |
60 | static LIST_HEAD(thermal_cdev_list); | |
61 | static DEFINE_MUTEX(thermal_list_lock); | |
62 | ||
63 | static int get_idr(struct idr *idr, struct mutex *lock, int *id) | |
64 | { | |
65 | int err; | |
66 | ||
67 | again: | |
68 | if (unlikely(idr_pre_get(idr, GFP_KERNEL) == 0)) | |
69 | return -ENOMEM; | |
70 | ||
71 | if (lock) | |
72 | mutex_lock(lock); | |
73 | err = idr_get_new(idr, NULL, id); | |
74 | if (lock) | |
75 | mutex_unlock(lock); | |
76 | if (unlikely(err == -EAGAIN)) | |
77 | goto again; | |
78 | else if (unlikely(err)) | |
79 | return err; | |
80 | ||
81 | *id = *id & MAX_ID_MASK; | |
82 | return 0; | |
83 | } | |
84 | ||
85 | static void release_idr(struct idr *idr, struct mutex *lock, int id) | |
86 | { | |
87 | if (lock) | |
88 | mutex_lock(lock); | |
89 | idr_remove(idr, id); | |
90 | if (lock) | |
91 | mutex_unlock(lock); | |
92 | } | |
93 | ||
94 | /* sys I/F for thermal zone */ | |
95 | ||
96 | #define to_thermal_zone(_dev) \ | |
97 | container_of(_dev, struct thermal_zone_device, device) | |
98 | ||
99 | static ssize_t | |
100 | type_show(struct device *dev, struct device_attribute *attr, char *buf) | |
101 | { | |
102 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
103 | ||
104 | return sprintf(buf, "%s\n", tz->type); | |
105 | } | |
106 | ||
107 | static ssize_t | |
108 | temp_show(struct device *dev, struct device_attribute *attr, char *buf) | |
109 | { | |
110 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
111 | long temperature; |
112 | int ret; | |
203d3d4a ZR |
113 | |
114 | if (!tz->ops->get_temp) | |
115 | return -EPERM; | |
116 | ||
6503e5df MG |
117 | ret = tz->ops->get_temp(tz, &temperature); |
118 | ||
119 | if (ret) | |
120 | return ret; | |
121 | ||
122 | return sprintf(buf, "%ld\n", temperature); | |
203d3d4a ZR |
123 | } |
124 | ||
125 | static ssize_t | |
126 | mode_show(struct device *dev, struct device_attribute *attr, char *buf) | |
127 | { | |
128 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
129 | enum thermal_device_mode mode; |
130 | int result; | |
203d3d4a ZR |
131 | |
132 | if (!tz->ops->get_mode) | |
133 | return -EPERM; | |
134 | ||
6503e5df MG |
135 | result = tz->ops->get_mode(tz, &mode); |
136 | if (result) | |
137 | return result; | |
138 | ||
139 | return sprintf(buf, "%s\n", mode == THERMAL_DEVICE_ENABLED ? "enabled" | |
140 | : "disabled"); | |
203d3d4a ZR |
141 | } |
142 | ||
143 | static ssize_t | |
144 | mode_store(struct device *dev, struct device_attribute *attr, | |
145 | const char *buf, size_t count) | |
146 | { | |
147 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
148 | int result; | |
149 | ||
150 | if (!tz->ops->set_mode) | |
151 | return -EPERM; | |
152 | ||
6503e5df MG |
153 | if (!strncmp(buf, "enabled", sizeof("enabled"))) |
154 | result = tz->ops->set_mode(tz, THERMAL_DEVICE_ENABLED); | |
155 | else if (!strncmp(buf, "disabled", sizeof("disabled"))) | |
156 | result = tz->ops->set_mode(tz, THERMAL_DEVICE_DISABLED); | |
157 | else | |
158 | result = -EINVAL; | |
159 | ||
203d3d4a ZR |
160 | if (result) |
161 | return result; | |
162 | ||
163 | return count; | |
164 | } | |
165 | ||
166 | static ssize_t | |
167 | trip_point_type_show(struct device *dev, struct device_attribute *attr, | |
168 | char *buf) | |
169 | { | |
170 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
171 | enum thermal_trip_type type; |
172 | int trip, result; | |
203d3d4a ZR |
173 | |
174 | if (!tz->ops->get_trip_type) | |
175 | return -EPERM; | |
176 | ||
177 | if (!sscanf(attr->attr.name, "trip_point_%d_type", &trip)) | |
178 | return -EINVAL; | |
179 | ||
6503e5df MG |
180 | result = tz->ops->get_trip_type(tz, trip, &type); |
181 | if (result) | |
182 | return result; | |
183 | ||
184 | switch (type) { | |
185 | case THERMAL_TRIP_CRITICAL: | |
625120a4 | 186 | return sprintf(buf, "critical\n"); |
6503e5df | 187 | case THERMAL_TRIP_HOT: |
625120a4 | 188 | return sprintf(buf, "hot\n"); |
6503e5df | 189 | case THERMAL_TRIP_PASSIVE: |
625120a4 | 190 | return sprintf(buf, "passive\n"); |
6503e5df | 191 | case THERMAL_TRIP_ACTIVE: |
625120a4 | 192 | return sprintf(buf, "active\n"); |
6503e5df | 193 | default: |
625120a4 | 194 | return sprintf(buf, "unknown\n"); |
6503e5df | 195 | } |
203d3d4a ZR |
196 | } |
197 | ||
198 | static ssize_t | |
199 | trip_point_temp_show(struct device *dev, struct device_attribute *attr, | |
200 | char *buf) | |
201 | { | |
202 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
203 | int trip, ret; |
204 | long temperature; | |
203d3d4a ZR |
205 | |
206 | if (!tz->ops->get_trip_temp) | |
207 | return -EPERM; | |
208 | ||
209 | if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip)) | |
210 | return -EINVAL; | |
211 | ||
6503e5df MG |
212 | ret = tz->ops->get_trip_temp(tz, trip, &temperature); |
213 | ||
214 | if (ret) | |
215 | return ret; | |
216 | ||
217 | return sprintf(buf, "%ld\n", temperature); | |
203d3d4a ZR |
218 | } |
219 | ||
03a971a2 MG |
220 | static ssize_t |
221 | passive_store(struct device *dev, struct device_attribute *attr, | |
222 | const char *buf, size_t count) | |
223 | { | |
224 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
225 | struct thermal_cooling_device *cdev = NULL; | |
226 | int state; | |
227 | ||
228 | if (!sscanf(buf, "%d\n", &state)) | |
229 | return -EINVAL; | |
230 | ||
3d8e3ad8 FP |
231 | /* sanity check: values below 1000 millicelcius don't make sense |
232 | * and can cause the system to go into a thermal heart attack | |
233 | */ | |
234 | if (state && state < 1000) | |
235 | return -EINVAL; | |
236 | ||
03a971a2 MG |
237 | if (state && !tz->forced_passive) { |
238 | mutex_lock(&thermal_list_lock); | |
239 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
240 | if (!strncmp("Processor", cdev->type, | |
241 | sizeof("Processor"))) | |
242 | thermal_zone_bind_cooling_device(tz, | |
243 | THERMAL_TRIPS_NONE, | |
244 | cdev); | |
245 | } | |
246 | mutex_unlock(&thermal_list_lock); | |
e4143b03 FP |
247 | if (!tz->passive_delay) |
248 | tz->passive_delay = 1000; | |
03a971a2 MG |
249 | } else if (!state && tz->forced_passive) { |
250 | mutex_lock(&thermal_list_lock); | |
251 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
252 | if (!strncmp("Processor", cdev->type, | |
253 | sizeof("Processor"))) | |
254 | thermal_zone_unbind_cooling_device(tz, | |
255 | THERMAL_TRIPS_NONE, | |
256 | cdev); | |
257 | } | |
258 | mutex_unlock(&thermal_list_lock); | |
e4143b03 | 259 | tz->passive_delay = 0; |
03a971a2 MG |
260 | } |
261 | ||
262 | tz->tc1 = 1; | |
263 | tz->tc2 = 1; | |
264 | ||
03a971a2 MG |
265 | tz->forced_passive = state; |
266 | ||
267 | thermal_zone_device_update(tz); | |
268 | ||
269 | return count; | |
270 | } | |
271 | ||
272 | static ssize_t | |
273 | passive_show(struct device *dev, struct device_attribute *attr, | |
274 | char *buf) | |
275 | { | |
276 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
277 | ||
278 | return sprintf(buf, "%d\n", tz->forced_passive); | |
279 | } | |
280 | ||
203d3d4a ZR |
281 | static DEVICE_ATTR(type, 0444, type_show, NULL); |
282 | static DEVICE_ATTR(temp, 0444, temp_show, NULL); | |
283 | static DEVICE_ATTR(mode, 0644, mode_show, mode_store); | |
886ee546 | 284 | static DEVICE_ATTR(passive, S_IRUGO | S_IWUSR, passive_show, passive_store); |
203d3d4a ZR |
285 | |
286 | static struct device_attribute trip_point_attrs[] = { | |
287 | __ATTR(trip_point_0_type, 0444, trip_point_type_show, NULL), | |
288 | __ATTR(trip_point_0_temp, 0444, trip_point_temp_show, NULL), | |
289 | __ATTR(trip_point_1_type, 0444, trip_point_type_show, NULL), | |
290 | __ATTR(trip_point_1_temp, 0444, trip_point_temp_show, NULL), | |
291 | __ATTR(trip_point_2_type, 0444, trip_point_type_show, NULL), | |
292 | __ATTR(trip_point_2_temp, 0444, trip_point_temp_show, NULL), | |
293 | __ATTR(trip_point_3_type, 0444, trip_point_type_show, NULL), | |
294 | __ATTR(trip_point_3_temp, 0444, trip_point_temp_show, NULL), | |
295 | __ATTR(trip_point_4_type, 0444, trip_point_type_show, NULL), | |
296 | __ATTR(trip_point_4_temp, 0444, trip_point_temp_show, NULL), | |
297 | __ATTR(trip_point_5_type, 0444, trip_point_type_show, NULL), | |
298 | __ATTR(trip_point_5_temp, 0444, trip_point_temp_show, NULL), | |
299 | __ATTR(trip_point_6_type, 0444, trip_point_type_show, NULL), | |
300 | __ATTR(trip_point_6_temp, 0444, trip_point_temp_show, NULL), | |
301 | __ATTR(trip_point_7_type, 0444, trip_point_type_show, NULL), | |
302 | __ATTR(trip_point_7_temp, 0444, trip_point_temp_show, NULL), | |
303 | __ATTR(trip_point_8_type, 0444, trip_point_type_show, NULL), | |
304 | __ATTR(trip_point_8_temp, 0444, trip_point_temp_show, NULL), | |
305 | __ATTR(trip_point_9_type, 0444, trip_point_type_show, NULL), | |
306 | __ATTR(trip_point_9_temp, 0444, trip_point_temp_show, NULL), | |
5f1a3f2a KH |
307 | __ATTR(trip_point_10_type, 0444, trip_point_type_show, NULL), |
308 | __ATTR(trip_point_10_temp, 0444, trip_point_temp_show, NULL), | |
309 | __ATTR(trip_point_11_type, 0444, trip_point_type_show, NULL), | |
310 | __ATTR(trip_point_11_temp, 0444, trip_point_temp_show, NULL), | |
203d3d4a ZR |
311 | }; |
312 | ||
203d3d4a ZR |
313 | /* sys I/F for cooling device */ |
314 | #define to_cooling_device(_dev) \ | |
315 | container_of(_dev, struct thermal_cooling_device, device) | |
316 | ||
317 | static ssize_t | |
318 | thermal_cooling_device_type_show(struct device *dev, | |
319 | struct device_attribute *attr, char *buf) | |
320 | { | |
321 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
322 | ||
323 | return sprintf(buf, "%s\n", cdev->type); | |
324 | } | |
325 | ||
326 | static ssize_t | |
327 | thermal_cooling_device_max_state_show(struct device *dev, | |
328 | struct device_attribute *attr, char *buf) | |
329 | { | |
330 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df MG |
331 | unsigned long state; |
332 | int ret; | |
203d3d4a | 333 | |
6503e5df MG |
334 | ret = cdev->ops->get_max_state(cdev, &state); |
335 | if (ret) | |
336 | return ret; | |
337 | return sprintf(buf, "%ld\n", state); | |
203d3d4a ZR |
338 | } |
339 | ||
340 | static ssize_t | |
341 | thermal_cooling_device_cur_state_show(struct device *dev, | |
342 | struct device_attribute *attr, char *buf) | |
343 | { | |
344 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df MG |
345 | unsigned long state; |
346 | int ret; | |
203d3d4a | 347 | |
6503e5df MG |
348 | ret = cdev->ops->get_cur_state(cdev, &state); |
349 | if (ret) | |
350 | return ret; | |
351 | return sprintf(buf, "%ld\n", state); | |
203d3d4a ZR |
352 | } |
353 | ||
354 | static ssize_t | |
355 | thermal_cooling_device_cur_state_store(struct device *dev, | |
356 | struct device_attribute *attr, | |
357 | const char *buf, size_t count) | |
358 | { | |
359 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df | 360 | unsigned long state; |
203d3d4a ZR |
361 | int result; |
362 | ||
6503e5df | 363 | if (!sscanf(buf, "%ld\n", &state)) |
203d3d4a ZR |
364 | return -EINVAL; |
365 | ||
edb94918 | 366 | if ((long)state < 0) |
203d3d4a ZR |
367 | return -EINVAL; |
368 | ||
369 | result = cdev->ops->set_cur_state(cdev, state); | |
370 | if (result) | |
371 | return result; | |
372 | return count; | |
373 | } | |
374 | ||
375 | static struct device_attribute dev_attr_cdev_type = | |
543a9561 | 376 | __ATTR(type, 0444, thermal_cooling_device_type_show, NULL); |
203d3d4a ZR |
377 | static DEVICE_ATTR(max_state, 0444, |
378 | thermal_cooling_device_max_state_show, NULL); | |
379 | static DEVICE_ATTR(cur_state, 0644, | |
380 | thermal_cooling_device_cur_state_show, | |
381 | thermal_cooling_device_cur_state_store); | |
382 | ||
383 | static ssize_t | |
384 | thermal_cooling_device_trip_point_show(struct device *dev, | |
543a9561 | 385 | struct device_attribute *attr, char *buf) |
203d3d4a ZR |
386 | { |
387 | struct thermal_cooling_device_instance *instance; | |
388 | ||
389 | instance = | |
390 | container_of(attr, struct thermal_cooling_device_instance, attr); | |
391 | ||
392 | if (instance->trip == THERMAL_TRIPS_NONE) | |
393 | return sprintf(buf, "-1\n"); | |
394 | else | |
395 | return sprintf(buf, "%d\n", instance->trip); | |
396 | } | |
397 | ||
398 | /* Device management */ | |
399 | ||
16d75239 RH |
400 | #if defined(CONFIG_THERMAL_HWMON) |
401 | ||
e68b16ab ZR |
402 | /* hwmon sys I/F */ |
403 | #include <linux/hwmon.h> | |
31f5396a JD |
404 | |
405 | /* thermal zone devices with the same type share one hwmon device */ | |
406 | struct thermal_hwmon_device { | |
407 | char type[THERMAL_NAME_LENGTH]; | |
408 | struct device *device; | |
409 | int count; | |
410 | struct list_head tz_list; | |
411 | struct list_head node; | |
412 | }; | |
413 | ||
414 | struct thermal_hwmon_attr { | |
415 | struct device_attribute attr; | |
416 | char name[16]; | |
417 | }; | |
418 | ||
419 | /* one temperature input for each thermal zone */ | |
420 | struct thermal_hwmon_temp { | |
421 | struct list_head hwmon_node; | |
422 | struct thermal_zone_device *tz; | |
423 | struct thermal_hwmon_attr temp_input; /* hwmon sys attr */ | |
424 | struct thermal_hwmon_attr temp_crit; /* hwmon sys attr */ | |
425 | }; | |
426 | ||
e68b16ab ZR |
427 | static LIST_HEAD(thermal_hwmon_list); |
428 | ||
429 | static ssize_t | |
430 | name_show(struct device *dev, struct device_attribute *attr, char *buf) | |
431 | { | |
0e968a3b | 432 | struct thermal_hwmon_device *hwmon = dev_get_drvdata(dev); |
e68b16ab ZR |
433 | return sprintf(buf, "%s\n", hwmon->type); |
434 | } | |
435 | static DEVICE_ATTR(name, 0444, name_show, NULL); | |
436 | ||
437 | static ssize_t | |
438 | temp_input_show(struct device *dev, struct device_attribute *attr, char *buf) | |
439 | { | |
6503e5df MG |
440 | long temperature; |
441 | int ret; | |
e68b16ab ZR |
442 | struct thermal_hwmon_attr *hwmon_attr |
443 | = container_of(attr, struct thermal_hwmon_attr, attr); | |
31f5396a JD |
444 | struct thermal_hwmon_temp *temp |
445 | = container_of(hwmon_attr, struct thermal_hwmon_temp, | |
e68b16ab | 446 | temp_input); |
31f5396a | 447 | struct thermal_zone_device *tz = temp->tz; |
e68b16ab | 448 | |
6503e5df MG |
449 | ret = tz->ops->get_temp(tz, &temperature); |
450 | ||
451 | if (ret) | |
452 | return ret; | |
453 | ||
454 | return sprintf(buf, "%ld\n", temperature); | |
e68b16ab ZR |
455 | } |
456 | ||
457 | static ssize_t | |
458 | temp_crit_show(struct device *dev, struct device_attribute *attr, | |
459 | char *buf) | |
460 | { | |
461 | struct thermal_hwmon_attr *hwmon_attr | |
462 | = container_of(attr, struct thermal_hwmon_attr, attr); | |
31f5396a JD |
463 | struct thermal_hwmon_temp *temp |
464 | = container_of(hwmon_attr, struct thermal_hwmon_temp, | |
e68b16ab | 465 | temp_crit); |
31f5396a | 466 | struct thermal_zone_device *tz = temp->tz; |
6503e5df MG |
467 | long temperature; |
468 | int ret; | |
469 | ||
470 | ret = tz->ops->get_trip_temp(tz, 0, &temperature); | |
471 | if (ret) | |
472 | return ret; | |
e68b16ab | 473 | |
6503e5df | 474 | return sprintf(buf, "%ld\n", temperature); |
e68b16ab ZR |
475 | } |
476 | ||
477 | ||
0d97d7a4 JD |
478 | static struct thermal_hwmon_device * |
479 | thermal_hwmon_lookup_by_type(const struct thermal_zone_device *tz) | |
e68b16ab ZR |
480 | { |
481 | struct thermal_hwmon_device *hwmon; | |
e68b16ab ZR |
482 | |
483 | mutex_lock(&thermal_list_lock); | |
484 | list_for_each_entry(hwmon, &thermal_hwmon_list, node) | |
485 | if (!strcmp(hwmon->type, tz->type)) { | |
e68b16ab | 486 | mutex_unlock(&thermal_list_lock); |
0d97d7a4 | 487 | return hwmon; |
e68b16ab ZR |
488 | } |
489 | mutex_unlock(&thermal_list_lock); | |
490 | ||
0d97d7a4 JD |
491 | return NULL; |
492 | } | |
493 | ||
31f5396a JD |
494 | /* Find the temperature input matching a given thermal zone */ |
495 | static struct thermal_hwmon_temp * | |
496 | thermal_hwmon_lookup_temp(const struct thermal_hwmon_device *hwmon, | |
497 | const struct thermal_zone_device *tz) | |
498 | { | |
499 | struct thermal_hwmon_temp *temp; | |
500 | ||
501 | mutex_lock(&thermal_list_lock); | |
502 | list_for_each_entry(temp, &hwmon->tz_list, hwmon_node) | |
503 | if (temp->tz == tz) { | |
504 | mutex_unlock(&thermal_list_lock); | |
505 | return temp; | |
506 | } | |
507 | mutex_unlock(&thermal_list_lock); | |
508 | ||
509 | return NULL; | |
510 | } | |
511 | ||
0d97d7a4 JD |
512 | static int |
513 | thermal_add_hwmon_sysfs(struct thermal_zone_device *tz) | |
514 | { | |
515 | struct thermal_hwmon_device *hwmon; | |
31f5396a | 516 | struct thermal_hwmon_temp *temp; |
0d97d7a4 JD |
517 | int new_hwmon_device = 1; |
518 | int result; | |
519 | ||
520 | hwmon = thermal_hwmon_lookup_by_type(tz); | |
521 | if (hwmon) { | |
522 | new_hwmon_device = 0; | |
523 | goto register_sys_interface; | |
524 | } | |
525 | ||
e68b16ab ZR |
526 | hwmon = kzalloc(sizeof(struct thermal_hwmon_device), GFP_KERNEL); |
527 | if (!hwmon) | |
528 | return -ENOMEM; | |
529 | ||
530 | INIT_LIST_HEAD(&hwmon->tz_list); | |
531 | strlcpy(hwmon->type, tz->type, THERMAL_NAME_LENGTH); | |
532 | hwmon->device = hwmon_device_register(NULL); | |
533 | if (IS_ERR(hwmon->device)) { | |
534 | result = PTR_ERR(hwmon->device); | |
535 | goto free_mem; | |
536 | } | |
0e968a3b | 537 | dev_set_drvdata(hwmon->device, hwmon); |
e68b16ab ZR |
538 | result = device_create_file(hwmon->device, &dev_attr_name); |
539 | if (result) | |
b299eb5c | 540 | goto free_mem; |
e68b16ab ZR |
541 | |
542 | register_sys_interface: | |
31f5396a JD |
543 | temp = kzalloc(sizeof(struct thermal_hwmon_temp), GFP_KERNEL); |
544 | if (!temp) { | |
545 | result = -ENOMEM; | |
546 | goto unregister_name; | |
547 | } | |
548 | ||
549 | temp->tz = tz; | |
e68b16ab ZR |
550 | hwmon->count++; |
551 | ||
31f5396a | 552 | snprintf(temp->temp_input.name, THERMAL_NAME_LENGTH, |
e68b16ab | 553 | "temp%d_input", hwmon->count); |
31f5396a JD |
554 | temp->temp_input.attr.attr.name = temp->temp_input.name; |
555 | temp->temp_input.attr.attr.mode = 0444; | |
556 | temp->temp_input.attr.show = temp_input_show; | |
557 | sysfs_attr_init(&temp->temp_input.attr.attr); | |
558 | result = device_create_file(hwmon->device, &temp->temp_input.attr); | |
e68b16ab | 559 | if (result) |
31f5396a | 560 | goto free_temp_mem; |
e68b16ab ZR |
561 | |
562 | if (tz->ops->get_crit_temp) { | |
563 | unsigned long temperature; | |
564 | if (!tz->ops->get_crit_temp(tz, &temperature)) { | |
31f5396a | 565 | snprintf(temp->temp_crit.name, THERMAL_NAME_LENGTH, |
e68b16ab | 566 | "temp%d_crit", hwmon->count); |
31f5396a JD |
567 | temp->temp_crit.attr.attr.name = temp->temp_crit.name; |
568 | temp->temp_crit.attr.attr.mode = 0444; | |
569 | temp->temp_crit.attr.show = temp_crit_show; | |
570 | sysfs_attr_init(&temp->temp_crit.attr.attr); | |
e68b16ab | 571 | result = device_create_file(hwmon->device, |
31f5396a | 572 | &temp->temp_crit.attr); |
e68b16ab | 573 | if (result) |
b299eb5c | 574 | goto unregister_input; |
e68b16ab ZR |
575 | } |
576 | } | |
577 | ||
578 | mutex_lock(&thermal_list_lock); | |
579 | if (new_hwmon_device) | |
580 | list_add_tail(&hwmon->node, &thermal_hwmon_list); | |
31f5396a | 581 | list_add_tail(&temp->hwmon_node, &hwmon->tz_list); |
e68b16ab ZR |
582 | mutex_unlock(&thermal_list_lock); |
583 | ||
584 | return 0; | |
585 | ||
b299eb5c | 586 | unregister_input: |
31f5396a JD |
587 | device_remove_file(hwmon->device, &temp->temp_input.attr); |
588 | free_temp_mem: | |
589 | kfree(temp); | |
b299eb5c | 590 | unregister_name: |
e68b16ab ZR |
591 | if (new_hwmon_device) { |
592 | device_remove_file(hwmon->device, &dev_attr_name); | |
593 | hwmon_device_unregister(hwmon->device); | |
594 | } | |
595 | free_mem: | |
596 | if (new_hwmon_device) | |
597 | kfree(hwmon); | |
598 | ||
599 | return result; | |
600 | } | |
601 | ||
602 | static void | |
603 | thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz) | |
604 | { | |
31f5396a JD |
605 | struct thermal_hwmon_device *hwmon; |
606 | struct thermal_hwmon_temp *temp; | |
607 | ||
608 | hwmon = thermal_hwmon_lookup_by_type(tz); | |
609 | if (unlikely(!hwmon)) { | |
610 | /* Should never happen... */ | |
611 | dev_dbg(&tz->device, "hwmon device lookup failed!\n"); | |
612 | return; | |
613 | } | |
614 | ||
615 | temp = thermal_hwmon_lookup_temp(hwmon, tz); | |
616 | if (unlikely(!temp)) { | |
617 | /* Should never happen... */ | |
618 | dev_dbg(&tz->device, "temperature input lookup failed!\n"); | |
619 | return; | |
620 | } | |
e68b16ab | 621 | |
31f5396a | 622 | device_remove_file(hwmon->device, &temp->temp_input.attr); |
b299eb5c | 623 | if (tz->ops->get_crit_temp) |
31f5396a | 624 | device_remove_file(hwmon->device, &temp->temp_crit.attr); |
e68b16ab ZR |
625 | |
626 | mutex_lock(&thermal_list_lock); | |
31f5396a JD |
627 | list_del(&temp->hwmon_node); |
628 | kfree(temp); | |
e68b16ab ZR |
629 | if (!list_empty(&hwmon->tz_list)) { |
630 | mutex_unlock(&thermal_list_lock); | |
631 | return; | |
632 | } | |
633 | list_del(&hwmon->node); | |
634 | mutex_unlock(&thermal_list_lock); | |
635 | ||
636 | device_remove_file(hwmon->device, &dev_attr_name); | |
637 | hwmon_device_unregister(hwmon->device); | |
638 | kfree(hwmon); | |
639 | } | |
640 | #else | |
641 | static int | |
642 | thermal_add_hwmon_sysfs(struct thermal_zone_device *tz) | |
643 | { | |
644 | return 0; | |
645 | } | |
646 | ||
647 | static void | |
648 | thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz) | |
649 | { | |
650 | } | |
651 | #endif | |
652 | ||
b1569e99 MG |
653 | static void thermal_zone_device_set_polling(struct thermal_zone_device *tz, |
654 | int delay) | |
655 | { | |
656 | cancel_delayed_work(&(tz->poll_queue)); | |
657 | ||
658 | if (!delay) | |
659 | return; | |
660 | ||
661 | if (delay > 1000) | |
51e20d0e | 662 | queue_delayed_work(system_freezable_wq, &(tz->poll_queue), |
b1569e99 MG |
663 | round_jiffies(msecs_to_jiffies(delay))); |
664 | else | |
51e20d0e | 665 | queue_delayed_work(system_freezable_wq, &(tz->poll_queue), |
b1569e99 MG |
666 | msecs_to_jiffies(delay)); |
667 | } | |
668 | ||
669 | static void thermal_zone_device_passive(struct thermal_zone_device *tz, | |
670 | int temp, int trip_temp, int trip) | |
671 | { | |
672 | int trend = 0; | |
673 | struct thermal_cooling_device_instance *instance; | |
674 | struct thermal_cooling_device *cdev; | |
675 | long state, max_state; | |
676 | ||
677 | /* | |
678 | * Above Trip? | |
679 | * ----------- | |
680 | * Calculate the thermal trend (using the passive cooling equation) | |
681 | * and modify the performance limit for all passive cooling devices | |
682 | * accordingly. Note that we assume symmetry. | |
683 | */ | |
684 | if (temp >= trip_temp) { | |
685 | tz->passive = true; | |
686 | ||
687 | trend = (tz->tc1 * (temp - tz->last_temperature)) + | |
688 | (tz->tc2 * (temp - trip_temp)); | |
689 | ||
690 | /* Heating up? */ | |
691 | if (trend > 0) { | |
692 | list_for_each_entry(instance, &tz->cooling_devices, | |
693 | node) { | |
694 | if (instance->trip != trip) | |
695 | continue; | |
696 | cdev = instance->cdev; | |
697 | cdev->ops->get_cur_state(cdev, &state); | |
698 | cdev->ops->get_max_state(cdev, &max_state); | |
699 | if (state++ < max_state) | |
700 | cdev->ops->set_cur_state(cdev, state); | |
701 | } | |
702 | } else if (trend < 0) { /* Cooling off? */ | |
703 | list_for_each_entry(instance, &tz->cooling_devices, | |
704 | node) { | |
705 | if (instance->trip != trip) | |
706 | continue; | |
707 | cdev = instance->cdev; | |
708 | cdev->ops->get_cur_state(cdev, &state); | |
709 | cdev->ops->get_max_state(cdev, &max_state); | |
710 | if (state > 0) | |
711 | cdev->ops->set_cur_state(cdev, --state); | |
712 | } | |
713 | } | |
714 | return; | |
715 | } | |
716 | ||
717 | /* | |
718 | * Below Trip? | |
719 | * ----------- | |
720 | * Implement passive cooling hysteresis to slowly increase performance | |
721 | * and avoid thrashing around the passive trip point. Note that we | |
722 | * assume symmetry. | |
723 | */ | |
724 | list_for_each_entry(instance, &tz->cooling_devices, node) { | |
725 | if (instance->trip != trip) | |
726 | continue; | |
727 | cdev = instance->cdev; | |
728 | cdev->ops->get_cur_state(cdev, &state); | |
729 | cdev->ops->get_max_state(cdev, &max_state); | |
730 | if (state > 0) | |
731 | cdev->ops->set_cur_state(cdev, --state); | |
732 | if (state == 0) | |
733 | tz->passive = false; | |
734 | } | |
735 | } | |
736 | ||
737 | static void thermal_zone_device_check(struct work_struct *work) | |
738 | { | |
739 | struct thermal_zone_device *tz = container_of(work, struct | |
740 | thermal_zone_device, | |
741 | poll_queue.work); | |
742 | thermal_zone_device_update(tz); | |
743 | } | |
e68b16ab | 744 | |
203d3d4a ZR |
745 | /** |
746 | * thermal_zone_bind_cooling_device - bind a cooling device to a thermal zone | |
203d3d4a ZR |
747 | * @tz: thermal zone device |
748 | * @trip: indicates which trip point the cooling devices is | |
749 | * associated with in this thermal zone. | |
750 | * @cdev: thermal cooling device | |
543a9561 LB |
751 | * |
752 | * This function is usually called in the thermal zone device .bind callback. | |
203d3d4a ZR |
753 | */ |
754 | int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, | |
755 | int trip, | |
756 | struct thermal_cooling_device *cdev) | |
757 | { | |
758 | struct thermal_cooling_device_instance *dev; | |
759 | struct thermal_cooling_device_instance *pos; | |
c7516709 TS |
760 | struct thermal_zone_device *pos1; |
761 | struct thermal_cooling_device *pos2; | |
203d3d4a ZR |
762 | int result; |
763 | ||
543a9561 | 764 | if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE)) |
203d3d4a ZR |
765 | return -EINVAL; |
766 | ||
c7516709 TS |
767 | list_for_each_entry(pos1, &thermal_tz_list, node) { |
768 | if (pos1 == tz) | |
769 | break; | |
770 | } | |
771 | list_for_each_entry(pos2, &thermal_cdev_list, node) { | |
772 | if (pos2 == cdev) | |
773 | break; | |
774 | } | |
775 | ||
776 | if (tz != pos1 || cdev != pos2) | |
203d3d4a ZR |
777 | return -EINVAL; |
778 | ||
779 | dev = | |
780 | kzalloc(sizeof(struct thermal_cooling_device_instance), GFP_KERNEL); | |
781 | if (!dev) | |
782 | return -ENOMEM; | |
783 | dev->tz = tz; | |
784 | dev->cdev = cdev; | |
785 | dev->trip = trip; | |
786 | result = get_idr(&tz->idr, &tz->lock, &dev->id); | |
787 | if (result) | |
788 | goto free_mem; | |
789 | ||
790 | sprintf(dev->name, "cdev%d", dev->id); | |
791 | result = | |
792 | sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev->name); | |
793 | if (result) | |
794 | goto release_idr; | |
795 | ||
796 | sprintf(dev->attr_name, "cdev%d_trip_point", dev->id); | |
975f8c56 | 797 | sysfs_attr_init(&dev->attr.attr); |
203d3d4a ZR |
798 | dev->attr.attr.name = dev->attr_name; |
799 | dev->attr.attr.mode = 0444; | |
800 | dev->attr.show = thermal_cooling_device_trip_point_show; | |
801 | result = device_create_file(&tz->device, &dev->attr); | |
802 | if (result) | |
803 | goto remove_symbol_link; | |
804 | ||
805 | mutex_lock(&tz->lock); | |
806 | list_for_each_entry(pos, &tz->cooling_devices, node) | |
807 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { | |
808 | result = -EEXIST; | |
809 | break; | |
810 | } | |
811 | if (!result) | |
812 | list_add_tail(&dev->node, &tz->cooling_devices); | |
813 | mutex_unlock(&tz->lock); | |
814 | ||
815 | if (!result) | |
816 | return 0; | |
817 | ||
818 | device_remove_file(&tz->device, &dev->attr); | |
819 | remove_symbol_link: | |
820 | sysfs_remove_link(&tz->device.kobj, dev->name); | |
821 | release_idr: | |
822 | release_idr(&tz->idr, &tz->lock, dev->id); | |
823 | free_mem: | |
824 | kfree(dev); | |
825 | return result; | |
826 | } | |
543a9561 | 827 | |
203d3d4a ZR |
828 | EXPORT_SYMBOL(thermal_zone_bind_cooling_device); |
829 | ||
830 | /** | |
831 | * thermal_zone_unbind_cooling_device - unbind a cooling device from a thermal zone | |
203d3d4a ZR |
832 | * @tz: thermal zone device |
833 | * @trip: indicates which trip point the cooling devices is | |
834 | * associated with in this thermal zone. | |
835 | * @cdev: thermal cooling device | |
543a9561 LB |
836 | * |
837 | * This function is usually called in the thermal zone device .unbind callback. | |
203d3d4a ZR |
838 | */ |
839 | int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz, | |
840 | int trip, | |
841 | struct thermal_cooling_device *cdev) | |
842 | { | |
843 | struct thermal_cooling_device_instance *pos, *next; | |
844 | ||
845 | mutex_lock(&tz->lock); | |
846 | list_for_each_entry_safe(pos, next, &tz->cooling_devices, node) { | |
543a9561 | 847 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
203d3d4a ZR |
848 | list_del(&pos->node); |
849 | mutex_unlock(&tz->lock); | |
850 | goto unbind; | |
851 | } | |
852 | } | |
853 | mutex_unlock(&tz->lock); | |
854 | ||
855 | return -ENODEV; | |
856 | ||
857 | unbind: | |
858 | device_remove_file(&tz->device, &pos->attr); | |
859 | sysfs_remove_link(&tz->device.kobj, pos->name); | |
860 | release_idr(&tz->idr, &tz->lock, pos->id); | |
861 | kfree(pos); | |
862 | return 0; | |
863 | } | |
543a9561 | 864 | |
203d3d4a ZR |
865 | EXPORT_SYMBOL(thermal_zone_unbind_cooling_device); |
866 | ||
867 | static void thermal_release(struct device *dev) | |
868 | { | |
869 | struct thermal_zone_device *tz; | |
870 | struct thermal_cooling_device *cdev; | |
871 | ||
354655ea | 872 | if (!strncmp(dev_name(dev), "thermal_zone", sizeof "thermal_zone" - 1)) { |
203d3d4a ZR |
873 | tz = to_thermal_zone(dev); |
874 | kfree(tz); | |
875 | } else { | |
876 | cdev = to_cooling_device(dev); | |
877 | kfree(cdev); | |
878 | } | |
879 | } | |
880 | ||
881 | static struct class thermal_class = { | |
882 | .name = "thermal", | |
883 | .dev_release = thermal_release, | |
884 | }; | |
885 | ||
886 | /** | |
887 | * thermal_cooling_device_register - register a new thermal cooling device | |
888 | * @type: the thermal cooling device type. | |
889 | * @devdata: device private data. | |
890 | * @ops: standard thermal cooling devices callbacks. | |
891 | */ | |
5b275ce2 AC |
892 | struct thermal_cooling_device *thermal_cooling_device_register( |
893 | char *type, void *devdata, const struct thermal_cooling_device_ops *ops) | |
203d3d4a ZR |
894 | { |
895 | struct thermal_cooling_device *cdev; | |
896 | struct thermal_zone_device *pos; | |
897 | int result; | |
898 | ||
899 | if (strlen(type) >= THERMAL_NAME_LENGTH) | |
3e6fda5c | 900 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
901 | |
902 | if (!ops || !ops->get_max_state || !ops->get_cur_state || | |
543a9561 | 903 | !ops->set_cur_state) |
3e6fda5c | 904 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
905 | |
906 | cdev = kzalloc(sizeof(struct thermal_cooling_device), GFP_KERNEL); | |
907 | if (!cdev) | |
3e6fda5c | 908 | return ERR_PTR(-ENOMEM); |
203d3d4a ZR |
909 | |
910 | result = get_idr(&thermal_cdev_idr, &thermal_idr_lock, &cdev->id); | |
911 | if (result) { | |
912 | kfree(cdev); | |
3e6fda5c | 913 | return ERR_PTR(result); |
203d3d4a ZR |
914 | } |
915 | ||
916 | strcpy(cdev->type, type); | |
917 | cdev->ops = ops; | |
918 | cdev->device.class = &thermal_class; | |
919 | cdev->devdata = devdata; | |
354655ea | 920 | dev_set_name(&cdev->device, "cooling_device%d", cdev->id); |
203d3d4a ZR |
921 | result = device_register(&cdev->device); |
922 | if (result) { | |
923 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
924 | kfree(cdev); | |
3e6fda5c | 925 | return ERR_PTR(result); |
203d3d4a ZR |
926 | } |
927 | ||
928 | /* sys I/F */ | |
929 | if (type) { | |
543a9561 | 930 | result = device_create_file(&cdev->device, &dev_attr_cdev_type); |
203d3d4a ZR |
931 | if (result) |
932 | goto unregister; | |
933 | } | |
934 | ||
935 | result = device_create_file(&cdev->device, &dev_attr_max_state); | |
936 | if (result) | |
937 | goto unregister; | |
938 | ||
939 | result = device_create_file(&cdev->device, &dev_attr_cur_state); | |
940 | if (result) | |
941 | goto unregister; | |
942 | ||
943 | mutex_lock(&thermal_list_lock); | |
944 | list_add(&cdev->node, &thermal_cdev_list); | |
945 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
946 | if (!pos->ops->bind) | |
947 | continue; | |
948 | result = pos->ops->bind(pos, cdev); | |
949 | if (result) | |
950 | break; | |
951 | ||
952 | } | |
953 | mutex_unlock(&thermal_list_lock); | |
954 | ||
955 | if (!result) | |
956 | return cdev; | |
957 | ||
958 | unregister: | |
959 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
960 | device_unregister(&cdev->device); | |
3e6fda5c | 961 | return ERR_PTR(result); |
203d3d4a | 962 | } |
543a9561 | 963 | |
203d3d4a ZR |
964 | EXPORT_SYMBOL(thermal_cooling_device_register); |
965 | ||
966 | /** | |
967 | * thermal_cooling_device_unregister - removes the registered thermal cooling device | |
203d3d4a ZR |
968 | * @cdev: the thermal cooling device to remove. |
969 | * | |
970 | * thermal_cooling_device_unregister() must be called when the device is no | |
971 | * longer needed. | |
972 | */ | |
973 | void thermal_cooling_device_unregister(struct | |
974 | thermal_cooling_device | |
975 | *cdev) | |
976 | { | |
977 | struct thermal_zone_device *tz; | |
978 | struct thermal_cooling_device *pos = NULL; | |
979 | ||
980 | if (!cdev) | |
981 | return; | |
982 | ||
983 | mutex_lock(&thermal_list_lock); | |
984 | list_for_each_entry(pos, &thermal_cdev_list, node) | |
985 | if (pos == cdev) | |
986 | break; | |
987 | if (pos != cdev) { | |
988 | /* thermal cooling device not found */ | |
989 | mutex_unlock(&thermal_list_lock); | |
990 | return; | |
991 | } | |
992 | list_del(&cdev->node); | |
993 | list_for_each_entry(tz, &thermal_tz_list, node) { | |
994 | if (!tz->ops->unbind) | |
995 | continue; | |
996 | tz->ops->unbind(tz, cdev); | |
997 | } | |
998 | mutex_unlock(&thermal_list_lock); | |
999 | if (cdev->type[0]) | |
543a9561 | 1000 | device_remove_file(&cdev->device, &dev_attr_cdev_type); |
203d3d4a ZR |
1001 | device_remove_file(&cdev->device, &dev_attr_max_state); |
1002 | device_remove_file(&cdev->device, &dev_attr_cur_state); | |
1003 | ||
1004 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
1005 | device_unregister(&cdev->device); | |
1006 | return; | |
1007 | } | |
543a9561 | 1008 | |
203d3d4a ZR |
1009 | EXPORT_SYMBOL(thermal_cooling_device_unregister); |
1010 | ||
b1569e99 MG |
1011 | /** |
1012 | * thermal_zone_device_update - force an update of a thermal zone's state | |
1013 | * @ttz: the thermal zone to update | |
1014 | */ | |
1015 | ||
1016 | void thermal_zone_device_update(struct thermal_zone_device *tz) | |
1017 | { | |
1018 | int count, ret = 0; | |
1019 | long temp, trip_temp; | |
1020 | enum thermal_trip_type trip_type; | |
1021 | struct thermal_cooling_device_instance *instance; | |
1022 | struct thermal_cooling_device *cdev; | |
1023 | ||
1024 | mutex_lock(&tz->lock); | |
1025 | ||
0d288162 MB |
1026 | if (tz->ops->get_temp(tz, &temp)) { |
1027 | /* get_temp failed - retry it later */ | |
1028 | printk(KERN_WARNING PREFIX "failed to read out thermal zone " | |
1029 | "%d\n", tz->id); | |
1030 | goto leave; | |
1031 | } | |
b1569e99 MG |
1032 | |
1033 | for (count = 0; count < tz->trips; count++) { | |
1034 | tz->ops->get_trip_type(tz, count, &trip_type); | |
1035 | tz->ops->get_trip_temp(tz, count, &trip_temp); | |
1036 | ||
1037 | switch (trip_type) { | |
1038 | case THERMAL_TRIP_CRITICAL: | |
29321357 | 1039 | if (temp >= trip_temp) { |
b1569e99 MG |
1040 | if (tz->ops->notify) |
1041 | ret = tz->ops->notify(tz, count, | |
1042 | trip_type); | |
1043 | if (!ret) { | |
1044 | printk(KERN_EMERG | |
1045 | "Critical temperature reached (%ld C), shutting down.\n", | |
1046 | temp/1000); | |
1047 | orderly_poweroff(true); | |
1048 | } | |
1049 | } | |
1050 | break; | |
1051 | case THERMAL_TRIP_HOT: | |
29321357 | 1052 | if (temp >= trip_temp) |
b1569e99 MG |
1053 | if (tz->ops->notify) |
1054 | tz->ops->notify(tz, count, trip_type); | |
1055 | break; | |
1056 | case THERMAL_TRIP_ACTIVE: | |
1057 | list_for_each_entry(instance, &tz->cooling_devices, | |
1058 | node) { | |
1059 | if (instance->trip != count) | |
1060 | continue; | |
1061 | ||
1062 | cdev = instance->cdev; | |
1063 | ||
29321357 | 1064 | if (temp >= trip_temp) |
b1569e99 MG |
1065 | cdev->ops->set_cur_state(cdev, 1); |
1066 | else | |
1067 | cdev->ops->set_cur_state(cdev, 0); | |
1068 | } | |
1069 | break; | |
1070 | case THERMAL_TRIP_PASSIVE: | |
29321357 | 1071 | if (temp >= trip_temp || tz->passive) |
b1569e99 MG |
1072 | thermal_zone_device_passive(tz, temp, |
1073 | trip_temp, count); | |
1074 | break; | |
1075 | } | |
1076 | } | |
03a971a2 MG |
1077 | |
1078 | if (tz->forced_passive) | |
1079 | thermal_zone_device_passive(tz, temp, tz->forced_passive, | |
1080 | THERMAL_TRIPS_NONE); | |
1081 | ||
b1569e99 | 1082 | tz->last_temperature = temp; |
0d288162 MB |
1083 | |
1084 | leave: | |
b1569e99 MG |
1085 | if (tz->passive) |
1086 | thermal_zone_device_set_polling(tz, tz->passive_delay); | |
1087 | else if (tz->polling_delay) | |
1088 | thermal_zone_device_set_polling(tz, tz->polling_delay); | |
3767cb54 FP |
1089 | else |
1090 | thermal_zone_device_set_polling(tz, 0); | |
b1569e99 MG |
1091 | mutex_unlock(&tz->lock); |
1092 | } | |
1093 | EXPORT_SYMBOL(thermal_zone_device_update); | |
1094 | ||
203d3d4a ZR |
1095 | /** |
1096 | * thermal_zone_device_register - register a new thermal zone device | |
1097 | * @type: the thermal zone device type | |
1098 | * @trips: the number of trip points the thermal zone support | |
1099 | * @devdata: private device data | |
1100 | * @ops: standard thermal zone device callbacks | |
b1569e99 MG |
1101 | * @tc1: thermal coefficient 1 for passive calculations |
1102 | * @tc2: thermal coefficient 2 for passive calculations | |
1103 | * @passive_delay: number of milliseconds to wait between polls when | |
1104 | * performing passive cooling | |
1105 | * @polling_delay: number of milliseconds to wait between polls when checking | |
1106 | * whether trip points have been crossed (0 for interrupt | |
1107 | * driven systems) | |
203d3d4a ZR |
1108 | * |
1109 | * thermal_zone_device_unregister() must be called when the device is no | |
b1569e99 MG |
1110 | * longer needed. The passive cooling formula uses tc1 and tc2 as described in |
1111 | * section 11.1.5.1 of the ACPI specification 3.0. | |
203d3d4a ZR |
1112 | */ |
1113 | struct thermal_zone_device *thermal_zone_device_register(char *type, | |
5b275ce2 AC |
1114 | int trips, void *devdata, |
1115 | const struct thermal_zone_device_ops *ops, | |
1116 | int tc1, int tc2, int passive_delay, int polling_delay) | |
203d3d4a ZR |
1117 | { |
1118 | struct thermal_zone_device *tz; | |
1119 | struct thermal_cooling_device *pos; | |
03a971a2 | 1120 | enum thermal_trip_type trip_type; |
203d3d4a ZR |
1121 | int result; |
1122 | int count; | |
03a971a2 | 1123 | int passive = 0; |
203d3d4a ZR |
1124 | |
1125 | if (strlen(type) >= THERMAL_NAME_LENGTH) | |
3e6fda5c | 1126 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1127 | |
1128 | if (trips > THERMAL_MAX_TRIPS || trips < 0) | |
3e6fda5c | 1129 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1130 | |
1131 | if (!ops || !ops->get_temp) | |
3e6fda5c | 1132 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1133 | |
1134 | tz = kzalloc(sizeof(struct thermal_zone_device), GFP_KERNEL); | |
1135 | if (!tz) | |
3e6fda5c | 1136 | return ERR_PTR(-ENOMEM); |
203d3d4a ZR |
1137 | |
1138 | INIT_LIST_HEAD(&tz->cooling_devices); | |
1139 | idr_init(&tz->idr); | |
1140 | mutex_init(&tz->lock); | |
1141 | result = get_idr(&thermal_tz_idr, &thermal_idr_lock, &tz->id); | |
1142 | if (result) { | |
1143 | kfree(tz); | |
3e6fda5c | 1144 | return ERR_PTR(result); |
203d3d4a ZR |
1145 | } |
1146 | ||
1147 | strcpy(tz->type, type); | |
1148 | tz->ops = ops; | |
1149 | tz->device.class = &thermal_class; | |
1150 | tz->devdata = devdata; | |
1151 | tz->trips = trips; | |
b1569e99 MG |
1152 | tz->tc1 = tc1; |
1153 | tz->tc2 = tc2; | |
1154 | tz->passive_delay = passive_delay; | |
1155 | tz->polling_delay = polling_delay; | |
1156 | ||
354655ea | 1157 | dev_set_name(&tz->device, "thermal_zone%d", tz->id); |
203d3d4a ZR |
1158 | result = device_register(&tz->device); |
1159 | if (result) { | |
1160 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); | |
1161 | kfree(tz); | |
3e6fda5c | 1162 | return ERR_PTR(result); |
203d3d4a ZR |
1163 | } |
1164 | ||
1165 | /* sys I/F */ | |
1166 | if (type) { | |
1167 | result = device_create_file(&tz->device, &dev_attr_type); | |
1168 | if (result) | |
1169 | goto unregister; | |
1170 | } | |
1171 | ||
1172 | result = device_create_file(&tz->device, &dev_attr_temp); | |
1173 | if (result) | |
1174 | goto unregister; | |
1175 | ||
1176 | if (ops->get_mode) { | |
1177 | result = device_create_file(&tz->device, &dev_attr_mode); | |
1178 | if (result) | |
1179 | goto unregister; | |
1180 | } | |
1181 | ||
1182 | for (count = 0; count < trips; count++) { | |
ec797685 JP |
1183 | result = device_create_file(&tz->device, |
1184 | &trip_point_attrs[count * 2]); | |
1185 | if (result) | |
1186 | break; | |
1187 | result = device_create_file(&tz->device, | |
1188 | &trip_point_attrs[count * 2 + 1]); | |
203d3d4a ZR |
1189 | if (result) |
1190 | goto unregister; | |
03a971a2 MG |
1191 | tz->ops->get_trip_type(tz, count, &trip_type); |
1192 | if (trip_type == THERMAL_TRIP_PASSIVE) | |
1193 | passive = 1; | |
203d3d4a ZR |
1194 | } |
1195 | ||
03a971a2 MG |
1196 | if (!passive) |
1197 | result = device_create_file(&tz->device, | |
1198 | &dev_attr_passive); | |
1199 | ||
1200 | if (result) | |
1201 | goto unregister; | |
1202 | ||
e68b16ab ZR |
1203 | result = thermal_add_hwmon_sysfs(tz); |
1204 | if (result) | |
1205 | goto unregister; | |
1206 | ||
203d3d4a ZR |
1207 | mutex_lock(&thermal_list_lock); |
1208 | list_add_tail(&tz->node, &thermal_tz_list); | |
1209 | if (ops->bind) | |
1210 | list_for_each_entry(pos, &thermal_cdev_list, node) { | |
543a9561 LB |
1211 | result = ops->bind(tz, pos); |
1212 | if (result) | |
1213 | break; | |
203d3d4a ZR |
1214 | } |
1215 | mutex_unlock(&thermal_list_lock); | |
1216 | ||
b1569e99 MG |
1217 | INIT_DELAYED_WORK(&(tz->poll_queue), thermal_zone_device_check); |
1218 | ||
1219 | thermal_zone_device_update(tz); | |
1220 | ||
203d3d4a ZR |
1221 | if (!result) |
1222 | return tz; | |
1223 | ||
1224 | unregister: | |
1225 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); | |
1226 | device_unregister(&tz->device); | |
3e6fda5c | 1227 | return ERR_PTR(result); |
203d3d4a | 1228 | } |
543a9561 | 1229 | |
203d3d4a ZR |
1230 | EXPORT_SYMBOL(thermal_zone_device_register); |
1231 | ||
1232 | /** | |
1233 | * thermal_device_unregister - removes the registered thermal zone device | |
203d3d4a ZR |
1234 | * @tz: the thermal zone device to remove |
1235 | */ | |
1236 | void thermal_zone_device_unregister(struct thermal_zone_device *tz) | |
1237 | { | |
1238 | struct thermal_cooling_device *cdev; | |
1239 | struct thermal_zone_device *pos = NULL; | |
1240 | int count; | |
1241 | ||
1242 | if (!tz) | |
1243 | return; | |
1244 | ||
1245 | mutex_lock(&thermal_list_lock); | |
1246 | list_for_each_entry(pos, &thermal_tz_list, node) | |
1247 | if (pos == tz) | |
1248 | break; | |
1249 | if (pos != tz) { | |
1250 | /* thermal zone device not found */ | |
1251 | mutex_unlock(&thermal_list_lock); | |
1252 | return; | |
1253 | } | |
1254 | list_del(&tz->node); | |
1255 | if (tz->ops->unbind) | |
1256 | list_for_each_entry(cdev, &thermal_cdev_list, node) | |
1257 | tz->ops->unbind(tz, cdev); | |
1258 | mutex_unlock(&thermal_list_lock); | |
1259 | ||
b1569e99 MG |
1260 | thermal_zone_device_set_polling(tz, 0); |
1261 | ||
203d3d4a ZR |
1262 | if (tz->type[0]) |
1263 | device_remove_file(&tz->device, &dev_attr_type); | |
1264 | device_remove_file(&tz->device, &dev_attr_temp); | |
1265 | if (tz->ops->get_mode) | |
1266 | device_remove_file(&tz->device, &dev_attr_mode); | |
1267 | ||
ec797685 JP |
1268 | for (count = 0; count < tz->trips; count++) { |
1269 | device_remove_file(&tz->device, | |
1270 | &trip_point_attrs[count * 2]); | |
1271 | device_remove_file(&tz->device, | |
1272 | &trip_point_attrs[count * 2 + 1]); | |
1273 | } | |
e68b16ab | 1274 | thermal_remove_hwmon_sysfs(tz); |
203d3d4a ZR |
1275 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1276 | idr_destroy(&tz->idr); | |
1277 | mutex_destroy(&tz->lock); | |
1278 | device_unregister(&tz->device); | |
1279 | return; | |
1280 | } | |
543a9561 | 1281 | |
203d3d4a ZR |
1282 | EXPORT_SYMBOL(thermal_zone_device_unregister); |
1283 | ||
af06216a RW |
1284 | #ifdef CONFIG_NET |
1285 | static struct genl_family thermal_event_genl_family = { | |
1286 | .id = GENL_ID_GENERATE, | |
1287 | .name = THERMAL_GENL_FAMILY_NAME, | |
1288 | .version = THERMAL_GENL_VERSION, | |
1289 | .maxattr = THERMAL_GENL_ATTR_MAX, | |
1290 | }; | |
1291 | ||
1292 | static struct genl_multicast_group thermal_event_mcgrp = { | |
1293 | .name = THERMAL_GENL_MCAST_GROUP_NAME, | |
1294 | }; | |
1295 | ||
2d58d7ea | 1296 | int thermal_generate_netlink_event(u32 orig, enum events event) |
4cb18728 D |
1297 | { |
1298 | struct sk_buff *skb; | |
1299 | struct nlattr *attr; | |
1300 | struct thermal_genl_event *thermal_event; | |
1301 | void *msg_header; | |
1302 | int size; | |
1303 | int result; | |
b11de07c | 1304 | static unsigned int thermal_event_seqnum; |
4cb18728 D |
1305 | |
1306 | /* allocate memory */ | |
886ee546 JP |
1307 | size = nla_total_size(sizeof(struct thermal_genl_event)) + |
1308 | nla_total_size(0); | |
4cb18728 D |
1309 | |
1310 | skb = genlmsg_new(size, GFP_ATOMIC); | |
1311 | if (!skb) | |
1312 | return -ENOMEM; | |
1313 | ||
1314 | /* add the genetlink message header */ | |
1315 | msg_header = genlmsg_put(skb, 0, thermal_event_seqnum++, | |
1316 | &thermal_event_genl_family, 0, | |
1317 | THERMAL_GENL_CMD_EVENT); | |
1318 | if (!msg_header) { | |
1319 | nlmsg_free(skb); | |
1320 | return -ENOMEM; | |
1321 | } | |
1322 | ||
1323 | /* fill the data */ | |
886ee546 JP |
1324 | attr = nla_reserve(skb, THERMAL_GENL_ATTR_EVENT, |
1325 | sizeof(struct thermal_genl_event)); | |
4cb18728 D |
1326 | |
1327 | if (!attr) { | |
1328 | nlmsg_free(skb); | |
1329 | return -EINVAL; | |
1330 | } | |
1331 | ||
1332 | thermal_event = nla_data(attr); | |
1333 | if (!thermal_event) { | |
1334 | nlmsg_free(skb); | |
1335 | return -EINVAL; | |
1336 | } | |
1337 | ||
1338 | memset(thermal_event, 0, sizeof(struct thermal_genl_event)); | |
1339 | ||
1340 | thermal_event->orig = orig; | |
1341 | thermal_event->event = event; | |
1342 | ||
1343 | /* send multicast genetlink message */ | |
1344 | result = genlmsg_end(skb, msg_header); | |
1345 | if (result < 0) { | |
1346 | nlmsg_free(skb); | |
1347 | return result; | |
1348 | } | |
1349 | ||
1350 | result = genlmsg_multicast(skb, 0, thermal_event_mcgrp.id, GFP_ATOMIC); | |
1351 | if (result) | |
1352 | printk(KERN_INFO "failed to send netlink event:%d", result); | |
1353 | ||
1354 | return result; | |
1355 | } | |
2d58d7ea | 1356 | EXPORT_SYMBOL(thermal_generate_netlink_event); |
4cb18728 D |
1357 | |
1358 | static int genetlink_init(void) | |
1359 | { | |
1360 | int result; | |
1361 | ||
1362 | result = genl_register_family(&thermal_event_genl_family); | |
1363 | if (result) | |
1364 | return result; | |
1365 | ||
1366 | result = genl_register_mc_group(&thermal_event_genl_family, | |
1367 | &thermal_event_mcgrp); | |
1368 | if (result) | |
1369 | genl_unregister_family(&thermal_event_genl_family); | |
1370 | return result; | |
1371 | } | |
1372 | ||
af06216a RW |
1373 | static void genetlink_exit(void) |
1374 | { | |
1375 | genl_unregister_family(&thermal_event_genl_family); | |
1376 | } | |
1377 | #else /* !CONFIG_NET */ | |
1378 | static inline int genetlink_init(void) { return 0; } | |
1379 | static inline void genetlink_exit(void) {} | |
1380 | #endif /* !CONFIG_NET */ | |
1381 | ||
203d3d4a ZR |
1382 | static int __init thermal_init(void) |
1383 | { | |
1384 | int result = 0; | |
1385 | ||
1386 | result = class_register(&thermal_class); | |
1387 | if (result) { | |
1388 | idr_destroy(&thermal_tz_idr); | |
1389 | idr_destroy(&thermal_cdev_idr); | |
1390 | mutex_destroy(&thermal_idr_lock); | |
1391 | mutex_destroy(&thermal_list_lock); | |
1392 | } | |
4cb18728 | 1393 | result = genetlink_init(); |
203d3d4a ZR |
1394 | return result; |
1395 | } | |
1396 | ||
1397 | static void __exit thermal_exit(void) | |
1398 | { | |
1399 | class_unregister(&thermal_class); | |
1400 | idr_destroy(&thermal_tz_idr); | |
1401 | idr_destroy(&thermal_cdev_idr); | |
1402 | mutex_destroy(&thermal_idr_lock); | |
1403 | mutex_destroy(&thermal_list_lock); | |
4cb18728 | 1404 | genetlink_exit(); |
203d3d4a ZR |
1405 | } |
1406 | ||
4cb18728 | 1407 | fs_initcall(thermal_init); |
203d3d4a | 1408 | module_exit(thermal_exit); |