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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> | |
29 | #include <linux/kdev_t.h> | |
30 | #include <linux/idr.h> | |
31 | #include <linux/thermal.h> | |
32 | #include <linux/spinlock.h> | |
b1569e99 | 33 | #include <linux/reboot.h> |
203d3d4a | 34 | |
63c4ec90 | 35 | MODULE_AUTHOR("Zhang Rui"); |
203d3d4a ZR |
36 | MODULE_DESCRIPTION("Generic thermal management sysfs support"); |
37 | MODULE_LICENSE("GPL"); | |
38 | ||
39 | #define PREFIX "Thermal: " | |
40 | ||
41 | struct thermal_cooling_device_instance { | |
42 | int id; | |
43 | char name[THERMAL_NAME_LENGTH]; | |
44 | struct thermal_zone_device *tz; | |
45 | struct thermal_cooling_device *cdev; | |
46 | int trip; | |
47 | char attr_name[THERMAL_NAME_LENGTH]; | |
48 | struct device_attribute attr; | |
49 | struct list_head node; | |
50 | }; | |
51 | ||
52 | static DEFINE_IDR(thermal_tz_idr); | |
53 | static DEFINE_IDR(thermal_cdev_idr); | |
54 | static DEFINE_MUTEX(thermal_idr_lock); | |
55 | ||
56 | static LIST_HEAD(thermal_tz_list); | |
57 | static LIST_HEAD(thermal_cdev_list); | |
58 | static DEFINE_MUTEX(thermal_list_lock); | |
59 | ||
60 | static int get_idr(struct idr *idr, struct mutex *lock, int *id) | |
61 | { | |
62 | int err; | |
63 | ||
64 | again: | |
65 | if (unlikely(idr_pre_get(idr, GFP_KERNEL) == 0)) | |
66 | return -ENOMEM; | |
67 | ||
68 | if (lock) | |
69 | mutex_lock(lock); | |
70 | err = idr_get_new(idr, NULL, id); | |
71 | if (lock) | |
72 | mutex_unlock(lock); | |
73 | if (unlikely(err == -EAGAIN)) | |
74 | goto again; | |
75 | else if (unlikely(err)) | |
76 | return err; | |
77 | ||
78 | *id = *id & MAX_ID_MASK; | |
79 | return 0; | |
80 | } | |
81 | ||
82 | static void release_idr(struct idr *idr, struct mutex *lock, int id) | |
83 | { | |
84 | if (lock) | |
85 | mutex_lock(lock); | |
86 | idr_remove(idr, id); | |
87 | if (lock) | |
88 | mutex_unlock(lock); | |
89 | } | |
90 | ||
91 | /* sys I/F for thermal zone */ | |
92 | ||
93 | #define to_thermal_zone(_dev) \ | |
94 | container_of(_dev, struct thermal_zone_device, device) | |
95 | ||
96 | static ssize_t | |
97 | type_show(struct device *dev, struct device_attribute *attr, char *buf) | |
98 | { | |
99 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
100 | ||
101 | return sprintf(buf, "%s\n", tz->type); | |
102 | } | |
103 | ||
104 | static ssize_t | |
105 | temp_show(struct device *dev, struct device_attribute *attr, char *buf) | |
106 | { | |
107 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
108 | long temperature; |
109 | int ret; | |
203d3d4a ZR |
110 | |
111 | if (!tz->ops->get_temp) | |
112 | return -EPERM; | |
113 | ||
6503e5df MG |
114 | ret = tz->ops->get_temp(tz, &temperature); |
115 | ||
116 | if (ret) | |
117 | return ret; | |
118 | ||
119 | return sprintf(buf, "%ld\n", temperature); | |
203d3d4a ZR |
120 | } |
121 | ||
122 | static ssize_t | |
123 | mode_show(struct device *dev, struct device_attribute *attr, char *buf) | |
124 | { | |
125 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
126 | enum thermal_device_mode mode; |
127 | int result; | |
203d3d4a ZR |
128 | |
129 | if (!tz->ops->get_mode) | |
130 | return -EPERM; | |
131 | ||
6503e5df MG |
132 | result = tz->ops->get_mode(tz, &mode); |
133 | if (result) | |
134 | return result; | |
135 | ||
136 | return sprintf(buf, "%s\n", mode == THERMAL_DEVICE_ENABLED ? "enabled" | |
137 | : "disabled"); | |
203d3d4a ZR |
138 | } |
139 | ||
140 | static ssize_t | |
141 | mode_store(struct device *dev, struct device_attribute *attr, | |
142 | const char *buf, size_t count) | |
143 | { | |
144 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
145 | int result; | |
146 | ||
147 | if (!tz->ops->set_mode) | |
148 | return -EPERM; | |
149 | ||
6503e5df MG |
150 | if (!strncmp(buf, "enabled", sizeof("enabled"))) |
151 | result = tz->ops->set_mode(tz, THERMAL_DEVICE_ENABLED); | |
152 | else if (!strncmp(buf, "disabled", sizeof("disabled"))) | |
153 | result = tz->ops->set_mode(tz, THERMAL_DEVICE_DISABLED); | |
154 | else | |
155 | result = -EINVAL; | |
156 | ||
203d3d4a ZR |
157 | if (result) |
158 | return result; | |
159 | ||
160 | return count; | |
161 | } | |
162 | ||
163 | static ssize_t | |
164 | trip_point_type_show(struct device *dev, struct device_attribute *attr, | |
165 | char *buf) | |
166 | { | |
167 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
168 | enum thermal_trip_type type; |
169 | int trip, result; | |
203d3d4a ZR |
170 | |
171 | if (!tz->ops->get_trip_type) | |
172 | return -EPERM; | |
173 | ||
174 | if (!sscanf(attr->attr.name, "trip_point_%d_type", &trip)) | |
175 | return -EINVAL; | |
176 | ||
6503e5df MG |
177 | result = tz->ops->get_trip_type(tz, trip, &type); |
178 | if (result) | |
179 | return result; | |
180 | ||
181 | switch (type) { | |
182 | case THERMAL_TRIP_CRITICAL: | |
183 | return sprintf(buf, "critical"); | |
184 | case THERMAL_TRIP_HOT: | |
185 | return sprintf(buf, "hot"); | |
186 | case THERMAL_TRIP_PASSIVE: | |
187 | return sprintf(buf, "passive"); | |
188 | case THERMAL_TRIP_ACTIVE: | |
189 | return sprintf(buf, "active"); | |
190 | default: | |
191 | return sprintf(buf, "unknown"); | |
192 | } | |
203d3d4a ZR |
193 | } |
194 | ||
195 | static ssize_t | |
196 | trip_point_temp_show(struct device *dev, struct device_attribute *attr, | |
197 | char *buf) | |
198 | { | |
199 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
6503e5df MG |
200 | int trip, ret; |
201 | long temperature; | |
203d3d4a ZR |
202 | |
203 | if (!tz->ops->get_trip_temp) | |
204 | return -EPERM; | |
205 | ||
206 | if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip)) | |
207 | return -EINVAL; | |
208 | ||
6503e5df MG |
209 | ret = tz->ops->get_trip_temp(tz, trip, &temperature); |
210 | ||
211 | if (ret) | |
212 | return ret; | |
213 | ||
214 | return sprintf(buf, "%ld\n", temperature); | |
203d3d4a ZR |
215 | } |
216 | ||
03a971a2 MG |
217 | static ssize_t |
218 | passive_store(struct device *dev, struct device_attribute *attr, | |
219 | const char *buf, size_t count) | |
220 | { | |
221 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
222 | struct thermal_cooling_device *cdev = NULL; | |
223 | int state; | |
224 | ||
225 | if (!sscanf(buf, "%d\n", &state)) | |
226 | return -EINVAL; | |
227 | ||
228 | if (state && !tz->forced_passive) { | |
229 | mutex_lock(&thermal_list_lock); | |
230 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
231 | if (!strncmp("Processor", cdev->type, | |
232 | sizeof("Processor"))) | |
233 | thermal_zone_bind_cooling_device(tz, | |
234 | THERMAL_TRIPS_NONE, | |
235 | cdev); | |
236 | } | |
237 | mutex_unlock(&thermal_list_lock); | |
238 | } else if (!state && tz->forced_passive) { | |
239 | mutex_lock(&thermal_list_lock); | |
240 | list_for_each_entry(cdev, &thermal_cdev_list, node) { | |
241 | if (!strncmp("Processor", cdev->type, | |
242 | sizeof("Processor"))) | |
243 | thermal_zone_unbind_cooling_device(tz, | |
244 | THERMAL_TRIPS_NONE, | |
245 | cdev); | |
246 | } | |
247 | mutex_unlock(&thermal_list_lock); | |
248 | } | |
249 | ||
250 | tz->tc1 = 1; | |
251 | tz->tc2 = 1; | |
252 | ||
253 | if (!tz->passive_delay) | |
254 | tz->passive_delay = 1000; | |
255 | ||
256 | if (!tz->polling_delay) | |
257 | tz->polling_delay = 10000; | |
258 | ||
259 | tz->forced_passive = state; | |
260 | ||
261 | thermal_zone_device_update(tz); | |
262 | ||
263 | return count; | |
264 | } | |
265 | ||
266 | static ssize_t | |
267 | passive_show(struct device *dev, struct device_attribute *attr, | |
268 | char *buf) | |
269 | { | |
270 | struct thermal_zone_device *tz = to_thermal_zone(dev); | |
271 | ||
272 | return sprintf(buf, "%d\n", tz->forced_passive); | |
273 | } | |
274 | ||
203d3d4a ZR |
275 | static DEVICE_ATTR(type, 0444, type_show, NULL); |
276 | static DEVICE_ATTR(temp, 0444, temp_show, NULL); | |
277 | static DEVICE_ATTR(mode, 0644, mode_show, mode_store); | |
03a971a2 MG |
278 | static DEVICE_ATTR(passive, S_IRUGO | S_IWUSR, passive_show, \ |
279 | passive_store); | |
203d3d4a ZR |
280 | |
281 | static struct device_attribute trip_point_attrs[] = { | |
282 | __ATTR(trip_point_0_type, 0444, trip_point_type_show, NULL), | |
283 | __ATTR(trip_point_0_temp, 0444, trip_point_temp_show, NULL), | |
284 | __ATTR(trip_point_1_type, 0444, trip_point_type_show, NULL), | |
285 | __ATTR(trip_point_1_temp, 0444, trip_point_temp_show, NULL), | |
286 | __ATTR(trip_point_2_type, 0444, trip_point_type_show, NULL), | |
287 | __ATTR(trip_point_2_temp, 0444, trip_point_temp_show, NULL), | |
288 | __ATTR(trip_point_3_type, 0444, trip_point_type_show, NULL), | |
289 | __ATTR(trip_point_3_temp, 0444, trip_point_temp_show, NULL), | |
290 | __ATTR(trip_point_4_type, 0444, trip_point_type_show, NULL), | |
291 | __ATTR(trip_point_4_temp, 0444, trip_point_temp_show, NULL), | |
292 | __ATTR(trip_point_5_type, 0444, trip_point_type_show, NULL), | |
293 | __ATTR(trip_point_5_temp, 0444, trip_point_temp_show, NULL), | |
294 | __ATTR(trip_point_6_type, 0444, trip_point_type_show, NULL), | |
295 | __ATTR(trip_point_6_temp, 0444, trip_point_temp_show, NULL), | |
296 | __ATTR(trip_point_7_type, 0444, trip_point_type_show, NULL), | |
297 | __ATTR(trip_point_7_temp, 0444, trip_point_temp_show, NULL), | |
298 | __ATTR(trip_point_8_type, 0444, trip_point_type_show, NULL), | |
299 | __ATTR(trip_point_8_temp, 0444, trip_point_temp_show, NULL), | |
300 | __ATTR(trip_point_9_type, 0444, trip_point_type_show, NULL), | |
301 | __ATTR(trip_point_9_temp, 0444, trip_point_temp_show, NULL), | |
5f1a3f2a KH |
302 | __ATTR(trip_point_10_type, 0444, trip_point_type_show, NULL), |
303 | __ATTR(trip_point_10_temp, 0444, trip_point_temp_show, NULL), | |
304 | __ATTR(trip_point_11_type, 0444, trip_point_type_show, NULL), | |
305 | __ATTR(trip_point_11_temp, 0444, trip_point_temp_show, NULL), | |
203d3d4a ZR |
306 | }; |
307 | ||
308 | #define TRIP_POINT_ATTR_ADD(_dev, _index, result) \ | |
309 | do { \ | |
310 | result = device_create_file(_dev, \ | |
311 | &trip_point_attrs[_index * 2]); \ | |
312 | if (result) \ | |
313 | break; \ | |
314 | result = device_create_file(_dev, \ | |
315 | &trip_point_attrs[_index * 2 + 1]); \ | |
316 | } while (0) | |
317 | ||
318 | #define TRIP_POINT_ATTR_REMOVE(_dev, _index) \ | |
319 | do { \ | |
320 | device_remove_file(_dev, &trip_point_attrs[_index * 2]); \ | |
321 | device_remove_file(_dev, &trip_point_attrs[_index * 2 + 1]); \ | |
322 | } while (0) | |
323 | ||
324 | /* sys I/F for cooling device */ | |
325 | #define to_cooling_device(_dev) \ | |
326 | container_of(_dev, struct thermal_cooling_device, device) | |
327 | ||
328 | static ssize_t | |
329 | thermal_cooling_device_type_show(struct device *dev, | |
330 | struct device_attribute *attr, char *buf) | |
331 | { | |
332 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
333 | ||
334 | return sprintf(buf, "%s\n", cdev->type); | |
335 | } | |
336 | ||
337 | static ssize_t | |
338 | thermal_cooling_device_max_state_show(struct device *dev, | |
339 | struct device_attribute *attr, char *buf) | |
340 | { | |
341 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df MG |
342 | unsigned long state; |
343 | int ret; | |
203d3d4a | 344 | |
6503e5df MG |
345 | ret = cdev->ops->get_max_state(cdev, &state); |
346 | if (ret) | |
347 | return ret; | |
348 | return sprintf(buf, "%ld\n", state); | |
203d3d4a ZR |
349 | } |
350 | ||
351 | static ssize_t | |
352 | thermal_cooling_device_cur_state_show(struct device *dev, | |
353 | struct device_attribute *attr, char *buf) | |
354 | { | |
355 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df MG |
356 | unsigned long state; |
357 | int ret; | |
203d3d4a | 358 | |
6503e5df MG |
359 | ret = cdev->ops->get_cur_state(cdev, &state); |
360 | if (ret) | |
361 | return ret; | |
362 | return sprintf(buf, "%ld\n", state); | |
203d3d4a ZR |
363 | } |
364 | ||
365 | static ssize_t | |
366 | thermal_cooling_device_cur_state_store(struct device *dev, | |
367 | struct device_attribute *attr, | |
368 | const char *buf, size_t count) | |
369 | { | |
370 | struct thermal_cooling_device *cdev = to_cooling_device(dev); | |
6503e5df | 371 | unsigned long state; |
203d3d4a ZR |
372 | int result; |
373 | ||
6503e5df | 374 | if (!sscanf(buf, "%ld\n", &state)) |
203d3d4a ZR |
375 | return -EINVAL; |
376 | ||
377 | if (state < 0) | |
378 | return -EINVAL; | |
379 | ||
380 | result = cdev->ops->set_cur_state(cdev, state); | |
381 | if (result) | |
382 | return result; | |
383 | return count; | |
384 | } | |
385 | ||
386 | static struct device_attribute dev_attr_cdev_type = | |
543a9561 | 387 | __ATTR(type, 0444, thermal_cooling_device_type_show, NULL); |
203d3d4a ZR |
388 | static DEVICE_ATTR(max_state, 0444, |
389 | thermal_cooling_device_max_state_show, NULL); | |
390 | static DEVICE_ATTR(cur_state, 0644, | |
391 | thermal_cooling_device_cur_state_show, | |
392 | thermal_cooling_device_cur_state_store); | |
393 | ||
394 | static ssize_t | |
395 | thermal_cooling_device_trip_point_show(struct device *dev, | |
543a9561 | 396 | struct device_attribute *attr, char *buf) |
203d3d4a ZR |
397 | { |
398 | struct thermal_cooling_device_instance *instance; | |
399 | ||
400 | instance = | |
401 | container_of(attr, struct thermal_cooling_device_instance, attr); | |
402 | ||
403 | if (instance->trip == THERMAL_TRIPS_NONE) | |
404 | return sprintf(buf, "-1\n"); | |
405 | else | |
406 | return sprintf(buf, "%d\n", instance->trip); | |
407 | } | |
408 | ||
409 | /* Device management */ | |
410 | ||
16d75239 RH |
411 | #if defined(CONFIG_THERMAL_HWMON) |
412 | ||
e68b16ab ZR |
413 | /* hwmon sys I/F */ |
414 | #include <linux/hwmon.h> | |
415 | static LIST_HEAD(thermal_hwmon_list); | |
416 | ||
417 | static ssize_t | |
418 | name_show(struct device *dev, struct device_attribute *attr, char *buf) | |
419 | { | |
420 | struct thermal_hwmon_device *hwmon = dev->driver_data; | |
421 | return sprintf(buf, "%s\n", hwmon->type); | |
422 | } | |
423 | static DEVICE_ATTR(name, 0444, name_show, NULL); | |
424 | ||
425 | static ssize_t | |
426 | temp_input_show(struct device *dev, struct device_attribute *attr, char *buf) | |
427 | { | |
6503e5df MG |
428 | long temperature; |
429 | int ret; | |
e68b16ab ZR |
430 | struct thermal_hwmon_attr *hwmon_attr |
431 | = container_of(attr, struct thermal_hwmon_attr, attr); | |
432 | struct thermal_zone_device *tz | |
433 | = container_of(hwmon_attr, struct thermal_zone_device, | |
434 | temp_input); | |
435 | ||
6503e5df MG |
436 | ret = tz->ops->get_temp(tz, &temperature); |
437 | ||
438 | if (ret) | |
439 | return ret; | |
440 | ||
441 | return sprintf(buf, "%ld\n", temperature); | |
e68b16ab ZR |
442 | } |
443 | ||
444 | static ssize_t | |
445 | temp_crit_show(struct device *dev, struct device_attribute *attr, | |
446 | char *buf) | |
447 | { | |
448 | struct thermal_hwmon_attr *hwmon_attr | |
449 | = container_of(attr, struct thermal_hwmon_attr, attr); | |
450 | struct thermal_zone_device *tz | |
451 | = container_of(hwmon_attr, struct thermal_zone_device, | |
452 | temp_crit); | |
6503e5df MG |
453 | long temperature; |
454 | int ret; | |
455 | ||
456 | ret = tz->ops->get_trip_temp(tz, 0, &temperature); | |
457 | if (ret) | |
458 | return ret; | |
e68b16ab | 459 | |
6503e5df | 460 | return sprintf(buf, "%ld\n", temperature); |
e68b16ab ZR |
461 | } |
462 | ||
463 | ||
464 | static int | |
465 | thermal_add_hwmon_sysfs(struct thermal_zone_device *tz) | |
466 | { | |
467 | struct thermal_hwmon_device *hwmon; | |
468 | int new_hwmon_device = 1; | |
469 | int result; | |
470 | ||
471 | mutex_lock(&thermal_list_lock); | |
472 | list_for_each_entry(hwmon, &thermal_hwmon_list, node) | |
473 | if (!strcmp(hwmon->type, tz->type)) { | |
474 | new_hwmon_device = 0; | |
475 | mutex_unlock(&thermal_list_lock); | |
476 | goto register_sys_interface; | |
477 | } | |
478 | mutex_unlock(&thermal_list_lock); | |
479 | ||
480 | hwmon = kzalloc(sizeof(struct thermal_hwmon_device), GFP_KERNEL); | |
481 | if (!hwmon) | |
482 | return -ENOMEM; | |
483 | ||
484 | INIT_LIST_HEAD(&hwmon->tz_list); | |
485 | strlcpy(hwmon->type, tz->type, THERMAL_NAME_LENGTH); | |
486 | hwmon->device = hwmon_device_register(NULL); | |
487 | if (IS_ERR(hwmon->device)) { | |
488 | result = PTR_ERR(hwmon->device); | |
489 | goto free_mem; | |
490 | } | |
491 | hwmon->device->driver_data = hwmon; | |
492 | result = device_create_file(hwmon->device, &dev_attr_name); | |
493 | if (result) | |
494 | goto unregister_hwmon_device; | |
495 | ||
496 | register_sys_interface: | |
497 | tz->hwmon = hwmon; | |
498 | hwmon->count++; | |
499 | ||
500 | snprintf(tz->temp_input.name, THERMAL_NAME_LENGTH, | |
501 | "temp%d_input", hwmon->count); | |
502 | tz->temp_input.attr.attr.name = tz->temp_input.name; | |
503 | tz->temp_input.attr.attr.mode = 0444; | |
504 | tz->temp_input.attr.show = temp_input_show; | |
505 | result = device_create_file(hwmon->device, &tz->temp_input.attr); | |
506 | if (result) | |
507 | goto unregister_hwmon_device; | |
508 | ||
509 | if (tz->ops->get_crit_temp) { | |
510 | unsigned long temperature; | |
511 | if (!tz->ops->get_crit_temp(tz, &temperature)) { | |
512 | snprintf(tz->temp_crit.name, THERMAL_NAME_LENGTH, | |
513 | "temp%d_crit", hwmon->count); | |
514 | tz->temp_crit.attr.attr.name = tz->temp_crit.name; | |
515 | tz->temp_crit.attr.attr.mode = 0444; | |
516 | tz->temp_crit.attr.show = temp_crit_show; | |
517 | result = device_create_file(hwmon->device, | |
518 | &tz->temp_crit.attr); | |
519 | if (result) | |
520 | goto unregister_hwmon_device; | |
521 | } | |
522 | } | |
523 | ||
524 | mutex_lock(&thermal_list_lock); | |
525 | if (new_hwmon_device) | |
526 | list_add_tail(&hwmon->node, &thermal_hwmon_list); | |
527 | list_add_tail(&tz->hwmon_node, &hwmon->tz_list); | |
528 | mutex_unlock(&thermal_list_lock); | |
529 | ||
530 | return 0; | |
531 | ||
532 | unregister_hwmon_device: | |
533 | device_remove_file(hwmon->device, &tz->temp_crit.attr); | |
534 | device_remove_file(hwmon->device, &tz->temp_input.attr); | |
535 | if (new_hwmon_device) { | |
536 | device_remove_file(hwmon->device, &dev_attr_name); | |
537 | hwmon_device_unregister(hwmon->device); | |
538 | } | |
539 | free_mem: | |
540 | if (new_hwmon_device) | |
541 | kfree(hwmon); | |
542 | ||
543 | return result; | |
544 | } | |
545 | ||
546 | static void | |
547 | thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz) | |
548 | { | |
549 | struct thermal_hwmon_device *hwmon = tz->hwmon; | |
550 | ||
551 | tz->hwmon = NULL; | |
552 | device_remove_file(hwmon->device, &tz->temp_input.attr); | |
553 | device_remove_file(hwmon->device, &tz->temp_crit.attr); | |
554 | ||
555 | mutex_lock(&thermal_list_lock); | |
556 | list_del(&tz->hwmon_node); | |
557 | if (!list_empty(&hwmon->tz_list)) { | |
558 | mutex_unlock(&thermal_list_lock); | |
559 | return; | |
560 | } | |
561 | list_del(&hwmon->node); | |
562 | mutex_unlock(&thermal_list_lock); | |
563 | ||
564 | device_remove_file(hwmon->device, &dev_attr_name); | |
565 | hwmon_device_unregister(hwmon->device); | |
566 | kfree(hwmon); | |
567 | } | |
568 | #else | |
569 | static int | |
570 | thermal_add_hwmon_sysfs(struct thermal_zone_device *tz) | |
571 | { | |
572 | return 0; | |
573 | } | |
574 | ||
575 | static void | |
576 | thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz) | |
577 | { | |
578 | } | |
579 | #endif | |
580 | ||
b1569e99 MG |
581 | static void thermal_zone_device_set_polling(struct thermal_zone_device *tz, |
582 | int delay) | |
583 | { | |
584 | cancel_delayed_work(&(tz->poll_queue)); | |
585 | ||
586 | if (!delay) | |
587 | return; | |
588 | ||
589 | if (delay > 1000) | |
590 | schedule_delayed_work(&(tz->poll_queue), | |
591 | round_jiffies(msecs_to_jiffies(delay))); | |
592 | else | |
593 | schedule_delayed_work(&(tz->poll_queue), | |
594 | msecs_to_jiffies(delay)); | |
595 | } | |
596 | ||
597 | static void thermal_zone_device_passive(struct thermal_zone_device *tz, | |
598 | int temp, int trip_temp, int trip) | |
599 | { | |
600 | int trend = 0; | |
601 | struct thermal_cooling_device_instance *instance; | |
602 | struct thermal_cooling_device *cdev; | |
603 | long state, max_state; | |
604 | ||
605 | /* | |
606 | * Above Trip? | |
607 | * ----------- | |
608 | * Calculate the thermal trend (using the passive cooling equation) | |
609 | * and modify the performance limit for all passive cooling devices | |
610 | * accordingly. Note that we assume symmetry. | |
611 | */ | |
612 | if (temp >= trip_temp) { | |
613 | tz->passive = true; | |
614 | ||
615 | trend = (tz->tc1 * (temp - tz->last_temperature)) + | |
616 | (tz->tc2 * (temp - trip_temp)); | |
617 | ||
618 | /* Heating up? */ | |
619 | if (trend > 0) { | |
620 | list_for_each_entry(instance, &tz->cooling_devices, | |
621 | node) { | |
622 | if (instance->trip != trip) | |
623 | continue; | |
624 | cdev = instance->cdev; | |
625 | cdev->ops->get_cur_state(cdev, &state); | |
626 | cdev->ops->get_max_state(cdev, &max_state); | |
627 | if (state++ < max_state) | |
628 | cdev->ops->set_cur_state(cdev, state); | |
629 | } | |
630 | } else if (trend < 0) { /* Cooling off? */ | |
631 | list_for_each_entry(instance, &tz->cooling_devices, | |
632 | node) { | |
633 | if (instance->trip != trip) | |
634 | continue; | |
635 | cdev = instance->cdev; | |
636 | cdev->ops->get_cur_state(cdev, &state); | |
637 | cdev->ops->get_max_state(cdev, &max_state); | |
638 | if (state > 0) | |
639 | cdev->ops->set_cur_state(cdev, --state); | |
640 | } | |
641 | } | |
642 | return; | |
643 | } | |
644 | ||
645 | /* | |
646 | * Below Trip? | |
647 | * ----------- | |
648 | * Implement passive cooling hysteresis to slowly increase performance | |
649 | * and avoid thrashing around the passive trip point. Note that we | |
650 | * assume symmetry. | |
651 | */ | |
652 | list_for_each_entry(instance, &tz->cooling_devices, node) { | |
653 | if (instance->trip != trip) | |
654 | continue; | |
655 | cdev = instance->cdev; | |
656 | cdev->ops->get_cur_state(cdev, &state); | |
657 | cdev->ops->get_max_state(cdev, &max_state); | |
658 | if (state > 0) | |
659 | cdev->ops->set_cur_state(cdev, --state); | |
660 | if (state == 0) | |
661 | tz->passive = false; | |
662 | } | |
663 | } | |
664 | ||
665 | static void thermal_zone_device_check(struct work_struct *work) | |
666 | { | |
667 | struct thermal_zone_device *tz = container_of(work, struct | |
668 | thermal_zone_device, | |
669 | poll_queue.work); | |
670 | thermal_zone_device_update(tz); | |
671 | } | |
e68b16ab | 672 | |
203d3d4a ZR |
673 | /** |
674 | * thermal_zone_bind_cooling_device - bind a cooling device to a thermal zone | |
203d3d4a ZR |
675 | * @tz: thermal zone device |
676 | * @trip: indicates which trip point the cooling devices is | |
677 | * associated with in this thermal zone. | |
678 | * @cdev: thermal cooling device | |
543a9561 LB |
679 | * |
680 | * This function is usually called in the thermal zone device .bind callback. | |
203d3d4a ZR |
681 | */ |
682 | int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, | |
683 | int trip, | |
684 | struct thermal_cooling_device *cdev) | |
685 | { | |
686 | struct thermal_cooling_device_instance *dev; | |
687 | struct thermal_cooling_device_instance *pos; | |
c7516709 TS |
688 | struct thermal_zone_device *pos1; |
689 | struct thermal_cooling_device *pos2; | |
203d3d4a ZR |
690 | int result; |
691 | ||
543a9561 | 692 | if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE)) |
203d3d4a ZR |
693 | return -EINVAL; |
694 | ||
c7516709 TS |
695 | list_for_each_entry(pos1, &thermal_tz_list, node) { |
696 | if (pos1 == tz) | |
697 | break; | |
698 | } | |
699 | list_for_each_entry(pos2, &thermal_cdev_list, node) { | |
700 | if (pos2 == cdev) | |
701 | break; | |
702 | } | |
703 | ||
704 | if (tz != pos1 || cdev != pos2) | |
203d3d4a ZR |
705 | return -EINVAL; |
706 | ||
707 | dev = | |
708 | kzalloc(sizeof(struct thermal_cooling_device_instance), GFP_KERNEL); | |
709 | if (!dev) | |
710 | return -ENOMEM; | |
711 | dev->tz = tz; | |
712 | dev->cdev = cdev; | |
713 | dev->trip = trip; | |
714 | result = get_idr(&tz->idr, &tz->lock, &dev->id); | |
715 | if (result) | |
716 | goto free_mem; | |
717 | ||
718 | sprintf(dev->name, "cdev%d", dev->id); | |
719 | result = | |
720 | sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev->name); | |
721 | if (result) | |
722 | goto release_idr; | |
723 | ||
724 | sprintf(dev->attr_name, "cdev%d_trip_point", dev->id); | |
725 | dev->attr.attr.name = dev->attr_name; | |
726 | dev->attr.attr.mode = 0444; | |
727 | dev->attr.show = thermal_cooling_device_trip_point_show; | |
728 | result = device_create_file(&tz->device, &dev->attr); | |
729 | if (result) | |
730 | goto remove_symbol_link; | |
731 | ||
732 | mutex_lock(&tz->lock); | |
733 | list_for_each_entry(pos, &tz->cooling_devices, node) | |
734 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { | |
735 | result = -EEXIST; | |
736 | break; | |
737 | } | |
738 | if (!result) | |
739 | list_add_tail(&dev->node, &tz->cooling_devices); | |
740 | mutex_unlock(&tz->lock); | |
741 | ||
742 | if (!result) | |
743 | return 0; | |
744 | ||
745 | device_remove_file(&tz->device, &dev->attr); | |
746 | remove_symbol_link: | |
747 | sysfs_remove_link(&tz->device.kobj, dev->name); | |
748 | release_idr: | |
749 | release_idr(&tz->idr, &tz->lock, dev->id); | |
750 | free_mem: | |
751 | kfree(dev); | |
752 | return result; | |
753 | } | |
543a9561 | 754 | |
203d3d4a ZR |
755 | EXPORT_SYMBOL(thermal_zone_bind_cooling_device); |
756 | ||
757 | /** | |
758 | * thermal_zone_unbind_cooling_device - unbind a cooling device from a thermal zone | |
203d3d4a ZR |
759 | * @tz: thermal zone device |
760 | * @trip: indicates which trip point the cooling devices is | |
761 | * associated with in this thermal zone. | |
762 | * @cdev: thermal cooling device | |
543a9561 LB |
763 | * |
764 | * This function is usually called in the thermal zone device .unbind callback. | |
203d3d4a ZR |
765 | */ |
766 | int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz, | |
767 | int trip, | |
768 | struct thermal_cooling_device *cdev) | |
769 | { | |
770 | struct thermal_cooling_device_instance *pos, *next; | |
771 | ||
772 | mutex_lock(&tz->lock); | |
773 | list_for_each_entry_safe(pos, next, &tz->cooling_devices, node) { | |
543a9561 | 774 | if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { |
203d3d4a ZR |
775 | list_del(&pos->node); |
776 | mutex_unlock(&tz->lock); | |
777 | goto unbind; | |
778 | } | |
779 | } | |
780 | mutex_unlock(&tz->lock); | |
781 | ||
782 | return -ENODEV; | |
783 | ||
784 | unbind: | |
785 | device_remove_file(&tz->device, &pos->attr); | |
786 | sysfs_remove_link(&tz->device.kobj, pos->name); | |
787 | release_idr(&tz->idr, &tz->lock, pos->id); | |
788 | kfree(pos); | |
789 | return 0; | |
790 | } | |
543a9561 | 791 | |
203d3d4a ZR |
792 | EXPORT_SYMBOL(thermal_zone_unbind_cooling_device); |
793 | ||
794 | static void thermal_release(struct device *dev) | |
795 | { | |
796 | struct thermal_zone_device *tz; | |
797 | struct thermal_cooling_device *cdev; | |
798 | ||
354655ea | 799 | if (!strncmp(dev_name(dev), "thermal_zone", sizeof "thermal_zone" - 1)) { |
203d3d4a ZR |
800 | tz = to_thermal_zone(dev); |
801 | kfree(tz); | |
802 | } else { | |
803 | cdev = to_cooling_device(dev); | |
804 | kfree(cdev); | |
805 | } | |
806 | } | |
807 | ||
808 | static struct class thermal_class = { | |
809 | .name = "thermal", | |
810 | .dev_release = thermal_release, | |
811 | }; | |
812 | ||
813 | /** | |
814 | * thermal_cooling_device_register - register a new thermal cooling device | |
815 | * @type: the thermal cooling device type. | |
816 | * @devdata: device private data. | |
817 | * @ops: standard thermal cooling devices callbacks. | |
818 | */ | |
819 | struct thermal_cooling_device *thermal_cooling_device_register(char *type, | |
543a9561 LB |
820 | void *devdata, |
821 | struct | |
822 | thermal_cooling_device_ops | |
823 | *ops) | |
203d3d4a ZR |
824 | { |
825 | struct thermal_cooling_device *cdev; | |
826 | struct thermal_zone_device *pos; | |
827 | int result; | |
828 | ||
829 | if (strlen(type) >= THERMAL_NAME_LENGTH) | |
3e6fda5c | 830 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
831 | |
832 | if (!ops || !ops->get_max_state || !ops->get_cur_state || | |
543a9561 | 833 | !ops->set_cur_state) |
3e6fda5c | 834 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
835 | |
836 | cdev = kzalloc(sizeof(struct thermal_cooling_device), GFP_KERNEL); | |
837 | if (!cdev) | |
3e6fda5c | 838 | return ERR_PTR(-ENOMEM); |
203d3d4a ZR |
839 | |
840 | result = get_idr(&thermal_cdev_idr, &thermal_idr_lock, &cdev->id); | |
841 | if (result) { | |
842 | kfree(cdev); | |
3e6fda5c | 843 | return ERR_PTR(result); |
203d3d4a ZR |
844 | } |
845 | ||
846 | strcpy(cdev->type, type); | |
847 | cdev->ops = ops; | |
848 | cdev->device.class = &thermal_class; | |
849 | cdev->devdata = devdata; | |
354655ea | 850 | dev_set_name(&cdev->device, "cooling_device%d", cdev->id); |
203d3d4a ZR |
851 | result = device_register(&cdev->device); |
852 | if (result) { | |
853 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
854 | kfree(cdev); | |
3e6fda5c | 855 | return ERR_PTR(result); |
203d3d4a ZR |
856 | } |
857 | ||
858 | /* sys I/F */ | |
859 | if (type) { | |
543a9561 | 860 | result = device_create_file(&cdev->device, &dev_attr_cdev_type); |
203d3d4a ZR |
861 | if (result) |
862 | goto unregister; | |
863 | } | |
864 | ||
865 | result = device_create_file(&cdev->device, &dev_attr_max_state); | |
866 | if (result) | |
867 | goto unregister; | |
868 | ||
869 | result = device_create_file(&cdev->device, &dev_attr_cur_state); | |
870 | if (result) | |
871 | goto unregister; | |
872 | ||
873 | mutex_lock(&thermal_list_lock); | |
874 | list_add(&cdev->node, &thermal_cdev_list); | |
875 | list_for_each_entry(pos, &thermal_tz_list, node) { | |
876 | if (!pos->ops->bind) | |
877 | continue; | |
878 | result = pos->ops->bind(pos, cdev); | |
879 | if (result) | |
880 | break; | |
881 | ||
882 | } | |
883 | mutex_unlock(&thermal_list_lock); | |
884 | ||
885 | if (!result) | |
886 | return cdev; | |
887 | ||
888 | unregister: | |
889 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
890 | device_unregister(&cdev->device); | |
3e6fda5c | 891 | return ERR_PTR(result); |
203d3d4a | 892 | } |
543a9561 | 893 | |
203d3d4a ZR |
894 | EXPORT_SYMBOL(thermal_cooling_device_register); |
895 | ||
896 | /** | |
897 | * thermal_cooling_device_unregister - removes the registered thermal cooling device | |
203d3d4a ZR |
898 | * @cdev: the thermal cooling device to remove. |
899 | * | |
900 | * thermal_cooling_device_unregister() must be called when the device is no | |
901 | * longer needed. | |
902 | */ | |
903 | void thermal_cooling_device_unregister(struct | |
904 | thermal_cooling_device | |
905 | *cdev) | |
906 | { | |
907 | struct thermal_zone_device *tz; | |
908 | struct thermal_cooling_device *pos = NULL; | |
909 | ||
910 | if (!cdev) | |
911 | return; | |
912 | ||
913 | mutex_lock(&thermal_list_lock); | |
914 | list_for_each_entry(pos, &thermal_cdev_list, node) | |
915 | if (pos == cdev) | |
916 | break; | |
917 | if (pos != cdev) { | |
918 | /* thermal cooling device not found */ | |
919 | mutex_unlock(&thermal_list_lock); | |
920 | return; | |
921 | } | |
922 | list_del(&cdev->node); | |
923 | list_for_each_entry(tz, &thermal_tz_list, node) { | |
924 | if (!tz->ops->unbind) | |
925 | continue; | |
926 | tz->ops->unbind(tz, cdev); | |
927 | } | |
928 | mutex_unlock(&thermal_list_lock); | |
929 | if (cdev->type[0]) | |
543a9561 | 930 | device_remove_file(&cdev->device, &dev_attr_cdev_type); |
203d3d4a ZR |
931 | device_remove_file(&cdev->device, &dev_attr_max_state); |
932 | device_remove_file(&cdev->device, &dev_attr_cur_state); | |
933 | ||
934 | release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id); | |
935 | device_unregister(&cdev->device); | |
936 | return; | |
937 | } | |
543a9561 | 938 | |
203d3d4a ZR |
939 | EXPORT_SYMBOL(thermal_cooling_device_unregister); |
940 | ||
b1569e99 MG |
941 | /** |
942 | * thermal_zone_device_update - force an update of a thermal zone's state | |
943 | * @ttz: the thermal zone to update | |
944 | */ | |
945 | ||
946 | void thermal_zone_device_update(struct thermal_zone_device *tz) | |
947 | { | |
948 | int count, ret = 0; | |
949 | long temp, trip_temp; | |
950 | enum thermal_trip_type trip_type; | |
951 | struct thermal_cooling_device_instance *instance; | |
952 | struct thermal_cooling_device *cdev; | |
953 | ||
954 | mutex_lock(&tz->lock); | |
955 | ||
956 | tz->ops->get_temp(tz, &temp); | |
957 | ||
958 | for (count = 0; count < tz->trips; count++) { | |
959 | tz->ops->get_trip_type(tz, count, &trip_type); | |
960 | tz->ops->get_trip_temp(tz, count, &trip_temp); | |
961 | ||
962 | switch (trip_type) { | |
963 | case THERMAL_TRIP_CRITICAL: | |
964 | if (temp > trip_temp) { | |
965 | if (tz->ops->notify) | |
966 | ret = tz->ops->notify(tz, count, | |
967 | trip_type); | |
968 | if (!ret) { | |
969 | printk(KERN_EMERG | |
970 | "Critical temperature reached (%ld C), shutting down.\n", | |
971 | temp/1000); | |
972 | orderly_poweroff(true); | |
973 | } | |
974 | } | |
975 | break; | |
976 | case THERMAL_TRIP_HOT: | |
977 | if (temp > trip_temp) | |
978 | if (tz->ops->notify) | |
979 | tz->ops->notify(tz, count, trip_type); | |
980 | break; | |
981 | case THERMAL_TRIP_ACTIVE: | |
982 | list_for_each_entry(instance, &tz->cooling_devices, | |
983 | node) { | |
984 | if (instance->trip != count) | |
985 | continue; | |
986 | ||
987 | cdev = instance->cdev; | |
988 | ||
989 | if (temp > trip_temp) | |
990 | cdev->ops->set_cur_state(cdev, 1); | |
991 | else | |
992 | cdev->ops->set_cur_state(cdev, 0); | |
993 | } | |
994 | break; | |
995 | case THERMAL_TRIP_PASSIVE: | |
996 | if (temp > trip_temp || tz->passive) | |
997 | thermal_zone_device_passive(tz, temp, | |
998 | trip_temp, count); | |
999 | break; | |
1000 | } | |
1001 | } | |
03a971a2 MG |
1002 | |
1003 | if (tz->forced_passive) | |
1004 | thermal_zone_device_passive(tz, temp, tz->forced_passive, | |
1005 | THERMAL_TRIPS_NONE); | |
1006 | ||
b1569e99 MG |
1007 | tz->last_temperature = temp; |
1008 | if (tz->passive) | |
1009 | thermal_zone_device_set_polling(tz, tz->passive_delay); | |
1010 | else if (tz->polling_delay) | |
1011 | thermal_zone_device_set_polling(tz, tz->polling_delay); | |
1012 | mutex_unlock(&tz->lock); | |
1013 | } | |
1014 | EXPORT_SYMBOL(thermal_zone_device_update); | |
1015 | ||
203d3d4a ZR |
1016 | /** |
1017 | * thermal_zone_device_register - register a new thermal zone device | |
1018 | * @type: the thermal zone device type | |
1019 | * @trips: the number of trip points the thermal zone support | |
1020 | * @devdata: private device data | |
1021 | * @ops: standard thermal zone device callbacks | |
b1569e99 MG |
1022 | * @tc1: thermal coefficient 1 for passive calculations |
1023 | * @tc2: thermal coefficient 2 for passive calculations | |
1024 | * @passive_delay: number of milliseconds to wait between polls when | |
1025 | * performing passive cooling | |
1026 | * @polling_delay: number of milliseconds to wait between polls when checking | |
1027 | * whether trip points have been crossed (0 for interrupt | |
1028 | * driven systems) | |
203d3d4a ZR |
1029 | * |
1030 | * thermal_zone_device_unregister() must be called when the device is no | |
b1569e99 MG |
1031 | * longer needed. The passive cooling formula uses tc1 and tc2 as described in |
1032 | * section 11.1.5.1 of the ACPI specification 3.0. | |
203d3d4a ZR |
1033 | */ |
1034 | struct thermal_zone_device *thermal_zone_device_register(char *type, | |
543a9561 LB |
1035 | int trips, |
1036 | void *devdata, struct | |
1037 | thermal_zone_device_ops | |
b1569e99 MG |
1038 | *ops, int tc1, int |
1039 | tc2, | |
1040 | int passive_delay, | |
1041 | int polling_delay) | |
203d3d4a ZR |
1042 | { |
1043 | struct thermal_zone_device *tz; | |
1044 | struct thermal_cooling_device *pos; | |
03a971a2 | 1045 | enum thermal_trip_type trip_type; |
203d3d4a ZR |
1046 | int result; |
1047 | int count; | |
03a971a2 | 1048 | int passive = 0; |
203d3d4a ZR |
1049 | |
1050 | if (strlen(type) >= THERMAL_NAME_LENGTH) | |
3e6fda5c | 1051 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1052 | |
1053 | if (trips > THERMAL_MAX_TRIPS || trips < 0) | |
3e6fda5c | 1054 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1055 | |
1056 | if (!ops || !ops->get_temp) | |
3e6fda5c | 1057 | return ERR_PTR(-EINVAL); |
203d3d4a ZR |
1058 | |
1059 | tz = kzalloc(sizeof(struct thermal_zone_device), GFP_KERNEL); | |
1060 | if (!tz) | |
3e6fda5c | 1061 | return ERR_PTR(-ENOMEM); |
203d3d4a ZR |
1062 | |
1063 | INIT_LIST_HEAD(&tz->cooling_devices); | |
1064 | idr_init(&tz->idr); | |
1065 | mutex_init(&tz->lock); | |
1066 | result = get_idr(&thermal_tz_idr, &thermal_idr_lock, &tz->id); | |
1067 | if (result) { | |
1068 | kfree(tz); | |
3e6fda5c | 1069 | return ERR_PTR(result); |
203d3d4a ZR |
1070 | } |
1071 | ||
1072 | strcpy(tz->type, type); | |
1073 | tz->ops = ops; | |
1074 | tz->device.class = &thermal_class; | |
1075 | tz->devdata = devdata; | |
1076 | tz->trips = trips; | |
b1569e99 MG |
1077 | tz->tc1 = tc1; |
1078 | tz->tc2 = tc2; | |
1079 | tz->passive_delay = passive_delay; | |
1080 | tz->polling_delay = polling_delay; | |
1081 | ||
354655ea | 1082 | dev_set_name(&tz->device, "thermal_zone%d", tz->id); |
203d3d4a ZR |
1083 | result = device_register(&tz->device); |
1084 | if (result) { | |
1085 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); | |
1086 | kfree(tz); | |
3e6fda5c | 1087 | return ERR_PTR(result); |
203d3d4a ZR |
1088 | } |
1089 | ||
1090 | /* sys I/F */ | |
1091 | if (type) { | |
1092 | result = device_create_file(&tz->device, &dev_attr_type); | |
1093 | if (result) | |
1094 | goto unregister; | |
1095 | } | |
1096 | ||
1097 | result = device_create_file(&tz->device, &dev_attr_temp); | |
1098 | if (result) | |
1099 | goto unregister; | |
1100 | ||
1101 | if (ops->get_mode) { | |
1102 | result = device_create_file(&tz->device, &dev_attr_mode); | |
1103 | if (result) | |
1104 | goto unregister; | |
1105 | } | |
1106 | ||
1107 | for (count = 0; count < trips; count++) { | |
1108 | TRIP_POINT_ATTR_ADD(&tz->device, count, result); | |
1109 | if (result) | |
1110 | goto unregister; | |
03a971a2 MG |
1111 | tz->ops->get_trip_type(tz, count, &trip_type); |
1112 | if (trip_type == THERMAL_TRIP_PASSIVE) | |
1113 | passive = 1; | |
203d3d4a ZR |
1114 | } |
1115 | ||
03a971a2 MG |
1116 | if (!passive) |
1117 | result = device_create_file(&tz->device, | |
1118 | &dev_attr_passive); | |
1119 | ||
1120 | if (result) | |
1121 | goto unregister; | |
1122 | ||
e68b16ab ZR |
1123 | result = thermal_add_hwmon_sysfs(tz); |
1124 | if (result) | |
1125 | goto unregister; | |
1126 | ||
203d3d4a ZR |
1127 | mutex_lock(&thermal_list_lock); |
1128 | list_add_tail(&tz->node, &thermal_tz_list); | |
1129 | if (ops->bind) | |
1130 | list_for_each_entry(pos, &thermal_cdev_list, node) { | |
543a9561 LB |
1131 | result = ops->bind(tz, pos); |
1132 | if (result) | |
1133 | break; | |
203d3d4a ZR |
1134 | } |
1135 | mutex_unlock(&thermal_list_lock); | |
1136 | ||
b1569e99 MG |
1137 | INIT_DELAYED_WORK(&(tz->poll_queue), thermal_zone_device_check); |
1138 | ||
1139 | thermal_zone_device_update(tz); | |
1140 | ||
203d3d4a ZR |
1141 | if (!result) |
1142 | return tz; | |
1143 | ||
1144 | unregister: | |
1145 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); | |
1146 | device_unregister(&tz->device); | |
3e6fda5c | 1147 | return ERR_PTR(result); |
203d3d4a | 1148 | } |
543a9561 | 1149 | |
203d3d4a ZR |
1150 | EXPORT_SYMBOL(thermal_zone_device_register); |
1151 | ||
1152 | /** | |
1153 | * thermal_device_unregister - removes the registered thermal zone device | |
203d3d4a ZR |
1154 | * @tz: the thermal zone device to remove |
1155 | */ | |
1156 | void thermal_zone_device_unregister(struct thermal_zone_device *tz) | |
1157 | { | |
1158 | struct thermal_cooling_device *cdev; | |
1159 | struct thermal_zone_device *pos = NULL; | |
1160 | int count; | |
1161 | ||
1162 | if (!tz) | |
1163 | return; | |
1164 | ||
1165 | mutex_lock(&thermal_list_lock); | |
1166 | list_for_each_entry(pos, &thermal_tz_list, node) | |
1167 | if (pos == tz) | |
1168 | break; | |
1169 | if (pos != tz) { | |
1170 | /* thermal zone device not found */ | |
1171 | mutex_unlock(&thermal_list_lock); | |
1172 | return; | |
1173 | } | |
1174 | list_del(&tz->node); | |
1175 | if (tz->ops->unbind) | |
1176 | list_for_each_entry(cdev, &thermal_cdev_list, node) | |
1177 | tz->ops->unbind(tz, cdev); | |
1178 | mutex_unlock(&thermal_list_lock); | |
1179 | ||
b1569e99 MG |
1180 | thermal_zone_device_set_polling(tz, 0); |
1181 | ||
203d3d4a ZR |
1182 | if (tz->type[0]) |
1183 | device_remove_file(&tz->device, &dev_attr_type); | |
1184 | device_remove_file(&tz->device, &dev_attr_temp); | |
1185 | if (tz->ops->get_mode) | |
1186 | device_remove_file(&tz->device, &dev_attr_mode); | |
1187 | ||
1188 | for (count = 0; count < tz->trips; count++) | |
1189 | TRIP_POINT_ATTR_REMOVE(&tz->device, count); | |
1190 | ||
e68b16ab | 1191 | thermal_remove_hwmon_sysfs(tz); |
203d3d4a ZR |
1192 | release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); |
1193 | idr_destroy(&tz->idr); | |
1194 | mutex_destroy(&tz->lock); | |
1195 | device_unregister(&tz->device); | |
1196 | return; | |
1197 | } | |
543a9561 | 1198 | |
203d3d4a ZR |
1199 | EXPORT_SYMBOL(thermal_zone_device_unregister); |
1200 | ||
1201 | static int __init thermal_init(void) | |
1202 | { | |
1203 | int result = 0; | |
1204 | ||
1205 | result = class_register(&thermal_class); | |
1206 | if (result) { | |
1207 | idr_destroy(&thermal_tz_idr); | |
1208 | idr_destroy(&thermal_cdev_idr); | |
1209 | mutex_destroy(&thermal_idr_lock); | |
1210 | mutex_destroy(&thermal_list_lock); | |
1211 | } | |
1212 | return result; | |
1213 | } | |
1214 | ||
1215 | static void __exit thermal_exit(void) | |
1216 | { | |
1217 | class_unregister(&thermal_class); | |
1218 | idr_destroy(&thermal_tz_idr); | |
1219 | idr_destroy(&thermal_cdev_idr); | |
1220 | mutex_destroy(&thermal_idr_lock); | |
1221 | mutex_destroy(&thermal_list_lock); | |
1222 | } | |
1223 | ||
1224 | subsys_initcall(thermal_init); | |
1225 | module_exit(thermal_exit); |