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1da177e4 LT |
1 | /* |
2 | * acpi_thermal.c - ACPI Thermal Zone Driver ($Revision: 41 $) | |
3 | * | |
4 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> | |
5 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
6 | * | |
7 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or (at | |
12 | * your option) any later version. | |
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 | * This driver fully implements the ACPI thermal policy as described in the | |
26 | * ACPI 2.0 Specification. | |
27 | * | |
28 | * TBD: 1. Implement passive cooling hysteresis. | |
29 | * 2. Enhance passive cooling (CPU) states/limit interface to support | |
30 | * concepts of 'multiple limiters', upper/lower limits, etc. | |
31 | * | |
32 | */ | |
33 | ||
34 | #include <linux/kernel.h> | |
35 | #include <linux/module.h> | |
0b5bfa1c | 36 | #include <linux/dmi.h> |
1da177e4 LT |
37 | #include <linux/init.h> |
38 | #include <linux/types.h> | |
39 | #include <linux/proc_fs.h> | |
cd354f1a TS |
40 | #include <linux/timer.h> |
41 | #include <linux/jiffies.h> | |
1da177e4 LT |
42 | #include <linux/kmod.h> |
43 | #include <linux/seq_file.h> | |
10a0a8d4 | 44 | #include <linux/reboot.h> |
1da177e4 LT |
45 | #include <asm/uaccess.h> |
46 | ||
47 | #include <acpi/acpi_bus.h> | |
48 | #include <acpi/acpi_drivers.h> | |
49 | ||
50 | #define ACPI_THERMAL_COMPONENT 0x04000000 | |
51 | #define ACPI_THERMAL_CLASS "thermal_zone" | |
1da177e4 LT |
52 | #define ACPI_THERMAL_DEVICE_NAME "Thermal Zone" |
53 | #define ACPI_THERMAL_FILE_STATE "state" | |
54 | #define ACPI_THERMAL_FILE_TEMPERATURE "temperature" | |
55 | #define ACPI_THERMAL_FILE_TRIP_POINTS "trip_points" | |
56 | #define ACPI_THERMAL_FILE_COOLING_MODE "cooling_mode" | |
57 | #define ACPI_THERMAL_FILE_POLLING_FREQ "polling_frequency" | |
58 | #define ACPI_THERMAL_NOTIFY_TEMPERATURE 0x80 | |
59 | #define ACPI_THERMAL_NOTIFY_THRESHOLDS 0x81 | |
60 | #define ACPI_THERMAL_NOTIFY_DEVICES 0x82 | |
61 | #define ACPI_THERMAL_NOTIFY_CRITICAL 0xF0 | |
62 | #define ACPI_THERMAL_NOTIFY_HOT 0xF1 | |
63 | #define ACPI_THERMAL_MODE_ACTIVE 0x00 | |
1da177e4 LT |
64 | |
65 | #define ACPI_THERMAL_MAX_ACTIVE 10 | |
66 | #define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65 | |
67 | ||
68 | #define KELVIN_TO_CELSIUS(t) (long)(((long)t-2732>=0) ? ((long)t-2732+5)/10 : ((long)t-2732-5)/10) | |
69 | #define CELSIUS_TO_KELVIN(t) ((t+273)*10) | |
70 | ||
71 | #define _COMPONENT ACPI_THERMAL_COMPONENT | |
f52fd66d | 72 | ACPI_MODULE_NAME("thermal"); |
1da177e4 | 73 | |
1cbf4c56 | 74 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 75 | MODULE_DESCRIPTION("ACPI Thermal Zone Driver"); |
1da177e4 LT |
76 | MODULE_LICENSE("GPL"); |
77 | ||
f8707ec9 LB |
78 | static int act; |
79 | module_param(act, int, 0644); | |
3c1d36da | 80 | MODULE_PARM_DESC(act, "Disable or override all lowest active trip points."); |
f8707ec9 | 81 | |
c52a7419 LB |
82 | static int crt; |
83 | module_param(crt, int, 0644); | |
84 | MODULE_PARM_DESC(crt, "Disable or lower all critical trip points."); | |
85 | ||
1da177e4 | 86 | static int tzp; |
730ff34d | 87 | module_param(tzp, int, 0444); |
3c1d36da | 88 | MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds."); |
1da177e4 | 89 | |
f5487145 LB |
90 | static int nocrt; |
91 | module_param(nocrt, int, 0); | |
8c99fdce | 92 | MODULE_PARM_DESC(nocrt, "Set to take no action upon ACPI thermal zone critical trips points."); |
f5487145 | 93 | |
72b33ef8 LB |
94 | static int off; |
95 | module_param(off, int, 0); | |
3c1d36da | 96 | MODULE_PARM_DESC(off, "Set to disable ACPI thermal support."); |
72b33ef8 | 97 | |
a70cdc52 LB |
98 | static int psv; |
99 | module_param(psv, int, 0644); | |
3c1d36da | 100 | MODULE_PARM_DESC(psv, "Disable or override all passive trip points."); |
a70cdc52 | 101 | |
4be44fcd LB |
102 | static int acpi_thermal_add(struct acpi_device *device); |
103 | static int acpi_thermal_remove(struct acpi_device *device, int type); | |
5d9464a4 | 104 | static int acpi_thermal_resume(struct acpi_device *device); |
1da177e4 LT |
105 | static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file); |
106 | static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file); | |
107 | static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file); | |
1da177e4 | 108 | static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file); |
4be44fcd LB |
109 | static ssize_t acpi_thermal_write_cooling_mode(struct file *, |
110 | const char __user *, size_t, | |
111 | loff_t *); | |
1da177e4 | 112 | static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file); |
4be44fcd LB |
113 | static ssize_t acpi_thermal_write_polling(struct file *, const char __user *, |
114 | size_t, loff_t *); | |
1da177e4 | 115 | |
1ba90e3a TR |
116 | static const struct acpi_device_id thermal_device_ids[] = { |
117 | {ACPI_THERMAL_HID, 0}, | |
118 | {"", 0}, | |
119 | }; | |
120 | MODULE_DEVICE_TABLE(acpi, thermal_device_ids); | |
121 | ||
1da177e4 | 122 | static struct acpi_driver acpi_thermal_driver = { |
c2b6705b | 123 | .name = "thermal", |
4be44fcd | 124 | .class = ACPI_THERMAL_CLASS, |
1ba90e3a | 125 | .ids = thermal_device_ids, |
4be44fcd LB |
126 | .ops = { |
127 | .add = acpi_thermal_add, | |
128 | .remove = acpi_thermal_remove, | |
74ce1468 | 129 | .resume = acpi_thermal_resume, |
4be44fcd | 130 | }, |
1da177e4 LT |
131 | }; |
132 | ||
133 | struct acpi_thermal_state { | |
4be44fcd LB |
134 | u8 critical:1; |
135 | u8 hot:1; | |
136 | u8 passive:1; | |
137 | u8 active:1; | |
138 | u8 reserved:4; | |
139 | int active_index; | |
1da177e4 LT |
140 | }; |
141 | ||
142 | struct acpi_thermal_state_flags { | |
4be44fcd LB |
143 | u8 valid:1; |
144 | u8 enabled:1; | |
145 | u8 reserved:6; | |
1da177e4 LT |
146 | }; |
147 | ||
148 | struct acpi_thermal_critical { | |
149 | struct acpi_thermal_state_flags flags; | |
4be44fcd | 150 | unsigned long temperature; |
1da177e4 LT |
151 | }; |
152 | ||
153 | struct acpi_thermal_hot { | |
154 | struct acpi_thermal_state_flags flags; | |
4be44fcd | 155 | unsigned long temperature; |
1da177e4 LT |
156 | }; |
157 | ||
158 | struct acpi_thermal_passive { | |
159 | struct acpi_thermal_state_flags flags; | |
4be44fcd LB |
160 | unsigned long temperature; |
161 | unsigned long tc1; | |
162 | unsigned long tc2; | |
163 | unsigned long tsp; | |
164 | struct acpi_handle_list devices; | |
1da177e4 LT |
165 | }; |
166 | ||
167 | struct acpi_thermal_active { | |
168 | struct acpi_thermal_state_flags flags; | |
4be44fcd LB |
169 | unsigned long temperature; |
170 | struct acpi_handle_list devices; | |
1da177e4 LT |
171 | }; |
172 | ||
173 | struct acpi_thermal_trips { | |
174 | struct acpi_thermal_critical critical; | |
4be44fcd | 175 | struct acpi_thermal_hot hot; |
1da177e4 LT |
176 | struct acpi_thermal_passive passive; |
177 | struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE]; | |
178 | }; | |
179 | ||
180 | struct acpi_thermal_flags { | |
4be44fcd LB |
181 | u8 cooling_mode:1; /* _SCP */ |
182 | u8 devices:1; /* _TZD */ | |
183 | u8 reserved:6; | |
1da177e4 LT |
184 | }; |
185 | ||
186 | struct acpi_thermal { | |
8348e1b1 | 187 | struct acpi_device * device; |
4be44fcd LB |
188 | acpi_bus_id name; |
189 | unsigned long temperature; | |
190 | unsigned long last_temperature; | |
191 | unsigned long polling_frequency; | |
4be44fcd | 192 | volatile u8 zombie; |
1da177e4 LT |
193 | struct acpi_thermal_flags flags; |
194 | struct acpi_thermal_state state; | |
195 | struct acpi_thermal_trips trips; | |
4be44fcd LB |
196 | struct acpi_handle_list devices; |
197 | struct timer_list timer; | |
6e215785 | 198 | struct mutex lock; |
1da177e4 LT |
199 | }; |
200 | ||
d7508032 | 201 | static const struct file_operations acpi_thermal_state_fops = { |
4be44fcd LB |
202 | .open = acpi_thermal_state_open_fs, |
203 | .read = seq_read, | |
204 | .llseek = seq_lseek, | |
205 | .release = single_release, | |
1da177e4 LT |
206 | }; |
207 | ||
d7508032 | 208 | static const struct file_operations acpi_thermal_temp_fops = { |
4be44fcd LB |
209 | .open = acpi_thermal_temp_open_fs, |
210 | .read = seq_read, | |
211 | .llseek = seq_lseek, | |
212 | .release = single_release, | |
1da177e4 LT |
213 | }; |
214 | ||
d7508032 | 215 | static const struct file_operations acpi_thermal_trip_fops = { |
4be44fcd LB |
216 | .open = acpi_thermal_trip_open_fs, |
217 | .read = seq_read, | |
4be44fcd LB |
218 | .llseek = seq_lseek, |
219 | .release = single_release, | |
1da177e4 LT |
220 | }; |
221 | ||
d7508032 | 222 | static const struct file_operations acpi_thermal_cooling_fops = { |
4be44fcd LB |
223 | .open = acpi_thermal_cooling_open_fs, |
224 | .read = seq_read, | |
225 | .write = acpi_thermal_write_cooling_mode, | |
226 | .llseek = seq_lseek, | |
227 | .release = single_release, | |
1da177e4 LT |
228 | }; |
229 | ||
d7508032 | 230 | static const struct file_operations acpi_thermal_polling_fops = { |
4be44fcd LB |
231 | .open = acpi_thermal_polling_open_fs, |
232 | .read = seq_read, | |
233 | .write = acpi_thermal_write_polling, | |
234 | .llseek = seq_lseek, | |
235 | .release = single_release, | |
1da177e4 LT |
236 | }; |
237 | ||
238 | /* -------------------------------------------------------------------------- | |
239 | Thermal Zone Management | |
240 | -------------------------------------------------------------------------- */ | |
241 | ||
4be44fcd | 242 | static int acpi_thermal_get_temperature(struct acpi_thermal *tz) |
1da177e4 | 243 | { |
4be44fcd | 244 | acpi_status status = AE_OK; |
1da177e4 | 245 | |
1da177e4 LT |
246 | |
247 | if (!tz) | |
d550d98d | 248 | return -EINVAL; |
1da177e4 LT |
249 | |
250 | tz->last_temperature = tz->temperature; | |
251 | ||
4be44fcd | 252 | status = |
38ba7c9e | 253 | acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tz->temperature); |
1da177e4 | 254 | if (ACPI_FAILURE(status)) |
d550d98d | 255 | return -ENODEV; |
1da177e4 | 256 | |
4be44fcd LB |
257 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n", |
258 | tz->temperature)); | |
1da177e4 | 259 | |
d550d98d | 260 | return 0; |
1da177e4 LT |
261 | } |
262 | ||
4be44fcd | 263 | static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz) |
1da177e4 | 264 | { |
4be44fcd | 265 | acpi_status status = AE_OK; |
1da177e4 | 266 | |
1da177e4 LT |
267 | |
268 | if (!tz) | |
d550d98d | 269 | return -EINVAL; |
1da177e4 | 270 | |
4be44fcd | 271 | status = |
38ba7c9e | 272 | acpi_evaluate_integer(tz->device->handle, "_TZP", NULL, |
4be44fcd | 273 | &tz->polling_frequency); |
1da177e4 | 274 | if (ACPI_FAILURE(status)) |
d550d98d | 275 | return -ENODEV; |
1da177e4 | 276 | |
4be44fcd LB |
277 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n", |
278 | tz->polling_frequency)); | |
1da177e4 | 279 | |
d550d98d | 280 | return 0; |
1da177e4 LT |
281 | } |
282 | ||
4be44fcd | 283 | static int acpi_thermal_set_polling(struct acpi_thermal *tz, int seconds) |
1da177e4 | 284 | { |
1da177e4 LT |
285 | |
286 | if (!tz) | |
d550d98d | 287 | return -EINVAL; |
1da177e4 LT |
288 | |
289 | tz->polling_frequency = seconds * 10; /* Convert value to deci-seconds */ | |
290 | ||
4be44fcd LB |
291 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
292 | "Polling frequency set to %lu seconds\n", | |
636cedf9 | 293 | tz->polling_frequency/10)); |
1da177e4 | 294 | |
d550d98d | 295 | return 0; |
1da177e4 LT |
296 | } |
297 | ||
4be44fcd | 298 | static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode) |
1da177e4 | 299 | { |
4be44fcd LB |
300 | acpi_status status = AE_OK; |
301 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
302 | struct acpi_object_list arg_list = { 1, &arg0 }; | |
303 | acpi_handle handle = NULL; | |
1da177e4 | 304 | |
1da177e4 LT |
305 | |
306 | if (!tz) | |
d550d98d | 307 | return -EINVAL; |
1da177e4 | 308 | |
38ba7c9e | 309 | status = acpi_get_handle(tz->device->handle, "_SCP", &handle); |
1da177e4 LT |
310 | if (ACPI_FAILURE(status)) { |
311 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n")); | |
d550d98d | 312 | return -ENODEV; |
1da177e4 LT |
313 | } |
314 | ||
315 | arg0.integer.value = mode; | |
316 | ||
317 | status = acpi_evaluate_object(handle, NULL, &arg_list, NULL); | |
318 | if (ACPI_FAILURE(status)) | |
d550d98d | 319 | return -ENODEV; |
1da177e4 | 320 | |
d550d98d | 321 | return 0; |
1da177e4 LT |
322 | } |
323 | ||
4be44fcd | 324 | static int acpi_thermal_get_trip_points(struct acpi_thermal *tz) |
1da177e4 | 325 | { |
4be44fcd LB |
326 | acpi_status status = AE_OK; |
327 | int i = 0; | |
1da177e4 | 328 | |
1da177e4 LT |
329 | |
330 | if (!tz) | |
d550d98d | 331 | return -EINVAL; |
1da177e4 LT |
332 | |
333 | /* Critical Shutdown (required) */ | |
334 | ||
38ba7c9e | 335 | status = acpi_evaluate_integer(tz->device->handle, "_CRT", NULL, |
4be44fcd | 336 | &tz->trips.critical.temperature); |
1da177e4 LT |
337 | if (ACPI_FAILURE(status)) { |
338 | tz->trips.critical.flags.valid = 0; | |
a6fc6720 | 339 | ACPI_EXCEPTION((AE_INFO, status, "No critical threshold")); |
d550d98d | 340 | return -ENODEV; |
4be44fcd | 341 | } else { |
1da177e4 | 342 | tz->trips.critical.flags.valid = 1; |
4be44fcd LB |
343 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
344 | "Found critical threshold [%lu]\n", | |
345 | tz->trips.critical.temperature)); | |
1da177e4 LT |
346 | } |
347 | ||
c52a7419 LB |
348 | if (tz->trips.critical.flags.valid == 1) { |
349 | if (crt == -1) { | |
350 | tz->trips.critical.flags.valid = 0; | |
351 | } else if (crt > 0) { | |
352 | unsigned long crt_k = CELSIUS_TO_KELVIN(crt); | |
353 | ||
354 | /* | |
355 | * Allow override to lower critical threshold | |
356 | */ | |
357 | if (crt_k < tz->trips.critical.temperature) | |
358 | tz->trips.critical.temperature = crt_k; | |
359 | } | |
360 | } | |
361 | ||
1da177e4 LT |
362 | /* Critical Sleep (optional) */ |
363 | ||
4be44fcd | 364 | status = |
38ba7c9e | 365 | acpi_evaluate_integer(tz->device->handle, "_HOT", NULL, |
4be44fcd | 366 | &tz->trips.hot.temperature); |
1da177e4 LT |
367 | if (ACPI_FAILURE(status)) { |
368 | tz->trips.hot.flags.valid = 0; | |
369 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No hot threshold\n")); | |
4be44fcd | 370 | } else { |
1da177e4 | 371 | tz->trips.hot.flags.valid = 1; |
4be44fcd LB |
372 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found hot threshold [%lu]\n", |
373 | tz->trips.hot.temperature)); | |
1da177e4 LT |
374 | } |
375 | ||
376 | /* Passive: Processors (optional) */ | |
377 | ||
a70cdc52 LB |
378 | if (psv == -1) { |
379 | status = AE_SUPPORT; | |
380 | } else if (psv > 0) { | |
381 | tz->trips.passive.temperature = CELSIUS_TO_KELVIN(psv); | |
382 | status = AE_OK; | |
383 | } else { | |
384 | status = acpi_evaluate_integer(tz->device->handle, | |
385 | "_PSV", NULL, &tz->trips.passive.temperature); | |
386 | } | |
387 | ||
1da177e4 LT |
388 | if (ACPI_FAILURE(status)) { |
389 | tz->trips.passive.flags.valid = 0; | |
390 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No passive threshold\n")); | |
4be44fcd | 391 | } else { |
1da177e4 LT |
392 | tz->trips.passive.flags.valid = 1; |
393 | ||
4be44fcd | 394 | status = |
38ba7c9e | 395 | acpi_evaluate_integer(tz->device->handle, "_TC1", NULL, |
4be44fcd | 396 | &tz->trips.passive.tc1); |
1da177e4 LT |
397 | if (ACPI_FAILURE(status)) |
398 | tz->trips.passive.flags.valid = 0; | |
399 | ||
4be44fcd | 400 | status = |
38ba7c9e | 401 | acpi_evaluate_integer(tz->device->handle, "_TC2", NULL, |
4be44fcd | 402 | &tz->trips.passive.tc2); |
1da177e4 LT |
403 | if (ACPI_FAILURE(status)) |
404 | tz->trips.passive.flags.valid = 0; | |
405 | ||
4be44fcd | 406 | status = |
38ba7c9e | 407 | acpi_evaluate_integer(tz->device->handle, "_TSP", NULL, |
4be44fcd | 408 | &tz->trips.passive.tsp); |
1da177e4 LT |
409 | if (ACPI_FAILURE(status)) |
410 | tz->trips.passive.flags.valid = 0; | |
411 | ||
4be44fcd | 412 | status = |
38ba7c9e | 413 | acpi_evaluate_reference(tz->device->handle, "_PSL", NULL, |
4be44fcd | 414 | &tz->trips.passive.devices); |
1da177e4 LT |
415 | if (ACPI_FAILURE(status)) |
416 | tz->trips.passive.flags.valid = 0; | |
417 | ||
418 | if (!tz->trips.passive.flags.valid) | |
cece9296 | 419 | printk(KERN_WARNING PREFIX "Invalid passive threshold\n"); |
1da177e4 | 420 | else |
4be44fcd LB |
421 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
422 | "Found passive threshold [%lu]\n", | |
423 | tz->trips.passive.temperature)); | |
1da177e4 LT |
424 | } |
425 | ||
426 | /* Active: Fans, etc. (optional) */ | |
427 | ||
4be44fcd | 428 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
1da177e4 | 429 | |
4be44fcd | 430 | char name[5] = { '_', 'A', 'C', ('0' + i), '\0' }; |
1da177e4 | 431 | |
f8707ec9 LB |
432 | if (act == -1) |
433 | break; /* disable all active trip points */ | |
434 | ||
435 | status = acpi_evaluate_integer(tz->device->handle, | |
436 | name, NULL, &tz->trips.active[i].temperature); | |
437 | ||
438 | if (ACPI_FAILURE(status)) { | |
439 | if (i == 0) /* no active trip points */ | |
440 | break; | |
441 | if (act <= 0) /* no override requested */ | |
442 | break; | |
443 | if (i == 1) { /* 1 trip point */ | |
444 | tz->trips.active[0].temperature = | |
445 | CELSIUS_TO_KELVIN(act); | |
446 | } else { /* multiple trips */ | |
447 | /* | |
448 | * Don't allow override higher than | |
449 | * the next higher trip point | |
450 | */ | |
451 | tz->trips.active[i - 1].temperature = | |
452 | (tz->trips.active[i - 2].temperature < | |
453 | CELSIUS_TO_KELVIN(act) ? | |
454 | tz->trips.active[i - 2].temperature : | |
455 | CELSIUS_TO_KELVIN(act)); | |
456 | } | |
1da177e4 | 457 | break; |
f8707ec9 | 458 | } |
1da177e4 LT |
459 | |
460 | name[2] = 'L'; | |
4be44fcd | 461 | status = |
38ba7c9e | 462 | acpi_evaluate_reference(tz->device->handle, name, NULL, |
4be44fcd | 463 | &tz->trips.active[i].devices); |
1da177e4 LT |
464 | if (ACPI_SUCCESS(status)) { |
465 | tz->trips.active[i].flags.valid = 1; | |
4be44fcd LB |
466 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
467 | "Found active threshold [%d]:[%lu]\n", | |
468 | i, tz->trips.active[i].temperature)); | |
469 | } else | |
a6fc6720 TR |
470 | ACPI_EXCEPTION((AE_INFO, status, |
471 | "Invalid active threshold [%d]", i)); | |
1da177e4 LT |
472 | } |
473 | ||
d550d98d | 474 | return 0; |
1da177e4 LT |
475 | } |
476 | ||
4be44fcd | 477 | static int acpi_thermal_get_devices(struct acpi_thermal *tz) |
1da177e4 | 478 | { |
4be44fcd | 479 | acpi_status status = AE_OK; |
1da177e4 | 480 | |
1da177e4 LT |
481 | |
482 | if (!tz) | |
d550d98d | 483 | return -EINVAL; |
1da177e4 | 484 | |
4be44fcd | 485 | status = |
38ba7c9e | 486 | acpi_evaluate_reference(tz->device->handle, "_TZD", NULL, &tz->devices); |
1da177e4 | 487 | if (ACPI_FAILURE(status)) |
d550d98d | 488 | return -ENODEV; |
1da177e4 | 489 | |
d550d98d | 490 | return 0; |
1da177e4 LT |
491 | } |
492 | ||
4be44fcd | 493 | static int acpi_thermal_critical(struct acpi_thermal *tz) |
1da177e4 | 494 | { |
f5487145 | 495 | if (!tz || !tz->trips.critical.flags.valid || nocrt) |
d550d98d | 496 | return -EINVAL; |
1da177e4 LT |
497 | |
498 | if (tz->temperature >= tz->trips.critical.temperature) { | |
cece9296 | 499 | printk(KERN_WARNING PREFIX "Critical trip point\n"); |
1da177e4 | 500 | tz->trips.critical.flags.enabled = 1; |
4be44fcd | 501 | } else if (tz->trips.critical.flags.enabled) |
1da177e4 LT |
502 | tz->trips.critical.flags.enabled = 0; |
503 | ||
4be44fcd LB |
504 | printk(KERN_EMERG |
505 | "Critical temperature reached (%ld C), shutting down.\n", | |
506 | KELVIN_TO_CELSIUS(tz->temperature)); | |
14e04fb3 | 507 | acpi_bus_generate_proc_event(tz->device, ACPI_THERMAL_NOTIFY_CRITICAL, |
4be44fcd | 508 | tz->trips.critical.flags.enabled); |
962ce8ca ZR |
509 | acpi_bus_generate_netlink_event(tz->device->pnp.device_class, |
510 | tz->device->dev.bus_id, | |
511 | ACPI_THERMAL_NOTIFY_CRITICAL, | |
512 | tz->trips.critical.flags.enabled); | |
1da177e4 | 513 | |
10a0a8d4 | 514 | orderly_poweroff(true); |
1da177e4 | 515 | |
d550d98d | 516 | return 0; |
1da177e4 LT |
517 | } |
518 | ||
4be44fcd | 519 | static int acpi_thermal_hot(struct acpi_thermal *tz) |
1da177e4 | 520 | { |
f5487145 | 521 | if (!tz || !tz->trips.hot.flags.valid || nocrt) |
d550d98d | 522 | return -EINVAL; |
1da177e4 LT |
523 | |
524 | if (tz->temperature >= tz->trips.hot.temperature) { | |
cece9296 | 525 | printk(KERN_WARNING PREFIX "Hot trip point\n"); |
1da177e4 | 526 | tz->trips.hot.flags.enabled = 1; |
4be44fcd | 527 | } else if (tz->trips.hot.flags.enabled) |
1da177e4 LT |
528 | tz->trips.hot.flags.enabled = 0; |
529 | ||
14e04fb3 | 530 | acpi_bus_generate_proc_event(tz->device, ACPI_THERMAL_NOTIFY_HOT, |
4be44fcd | 531 | tz->trips.hot.flags.enabled); |
962ce8ca ZR |
532 | acpi_bus_generate_netlink_event(tz->device->pnp.device_class, |
533 | tz->device->dev.bus_id, | |
534 | ACPI_THERMAL_NOTIFY_HOT, | |
535 | tz->trips.hot.flags.enabled); | |
1da177e4 LT |
536 | |
537 | /* TBD: Call user-mode "sleep(S4)" function */ | |
538 | ||
d550d98d | 539 | return 0; |
1da177e4 LT |
540 | } |
541 | ||
1cbf4c56 | 542 | static void acpi_thermal_passive(struct acpi_thermal *tz) |
1da177e4 | 543 | { |
1cbf4c56 | 544 | int result = 1; |
1da177e4 | 545 | struct acpi_thermal_passive *passive = NULL; |
4be44fcd LB |
546 | int trend = 0; |
547 | int i = 0; | |
1da177e4 | 548 | |
1da177e4 LT |
549 | |
550 | if (!tz || !tz->trips.passive.flags.valid) | |
1cbf4c56 | 551 | return; |
1da177e4 LT |
552 | |
553 | passive = &(tz->trips.passive); | |
554 | ||
555 | /* | |
556 | * Above Trip? | |
557 | * ----------- | |
558 | * Calculate the thermal trend (using the passive cooling equation) | |
559 | * and modify the performance limit for all passive cooling devices | |
560 | * accordingly. Note that we assume symmetry. | |
561 | */ | |
562 | if (tz->temperature >= passive->temperature) { | |
4be44fcd LB |
563 | trend = |
564 | (passive->tc1 * (tz->temperature - tz->last_temperature)) + | |
565 | (passive->tc2 * (tz->temperature - passive->temperature)); | |
566 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
567 | "trend[%d]=(tc1[%lu]*(tmp[%lu]-last[%lu]))+(tc2[%lu]*(tmp[%lu]-psv[%lu]))\n", | |
568 | trend, passive->tc1, tz->temperature, | |
569 | tz->last_temperature, passive->tc2, | |
570 | tz->temperature, passive->temperature)); | |
1cbf4c56 | 571 | passive->flags.enabled = 1; |
1da177e4 LT |
572 | /* Heating up? */ |
573 | if (trend > 0) | |
4be44fcd LB |
574 | for (i = 0; i < passive->devices.count; i++) |
575 | acpi_processor_set_thermal_limit(passive-> | |
576 | devices. | |
577 | handles[i], | |
578 | ACPI_PROCESSOR_LIMIT_INCREMENT); | |
1da177e4 | 579 | /* Cooling off? */ |
1cbf4c56 | 580 | else if (trend < 0) { |
4be44fcd | 581 | for (i = 0; i < passive->devices.count; i++) |
1cbf4c56 TR |
582 | /* |
583 | * assume that we are on highest | |
584 | * freq/lowest thrott and can leave | |
585 | * passive mode, even in error case | |
586 | */ | |
587 | if (!acpi_processor_set_thermal_limit | |
588 | (passive->devices.handles[i], | |
589 | ACPI_PROCESSOR_LIMIT_DECREMENT)) | |
590 | result = 0; | |
591 | /* | |
592 | * Leave cooling mode, even if the temp might | |
593 | * higher than trip point This is because some | |
594 | * machines might have long thermal polling | |
595 | * frequencies (tsp) defined. We will fall back | |
596 | * into passive mode in next cycle (probably quicker) | |
597 | */ | |
598 | if (result) { | |
599 | passive->flags.enabled = 0; | |
600 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
601 | "Disabling passive cooling, still above threshold," | |
602 | " but we are cooling down\n")); | |
603 | } | |
604 | } | |
605 | return; | |
1da177e4 LT |
606 | } |
607 | ||
608 | /* | |
609 | * Below Trip? | |
610 | * ----------- | |
611 | * Implement passive cooling hysteresis to slowly increase performance | |
612 | * and avoid thrashing around the passive trip point. Note that we | |
613 | * assume symmetry. | |
614 | */ | |
1cbf4c56 TR |
615 | if (!passive->flags.enabled) |
616 | return; | |
617 | for (i = 0; i < passive->devices.count; i++) | |
618 | if (!acpi_processor_set_thermal_limit | |
619 | (passive->devices.handles[i], | |
620 | ACPI_PROCESSOR_LIMIT_DECREMENT)) | |
621 | result = 0; | |
622 | if (result) { | |
623 | passive->flags.enabled = 0; | |
624 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
625 | "Disabling passive cooling (zone is cool)\n")); | |
1da177e4 | 626 | } |
1da177e4 LT |
627 | } |
628 | ||
1cbf4c56 | 629 | static void acpi_thermal_active(struct acpi_thermal *tz) |
1da177e4 | 630 | { |
4be44fcd | 631 | int result = 0; |
1da177e4 | 632 | struct acpi_thermal_active *active = NULL; |
4be44fcd LB |
633 | int i = 0; |
634 | int j = 0; | |
635 | unsigned long maxtemp = 0; | |
1da177e4 | 636 | |
1da177e4 LT |
637 | |
638 | if (!tz) | |
1cbf4c56 | 639 | return; |
1da177e4 | 640 | |
4be44fcd | 641 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
1da177e4 LT |
642 | active = &(tz->trips.active[i]); |
643 | if (!active || !active->flags.valid) | |
644 | break; | |
1da177e4 | 645 | if (tz->temperature >= active->temperature) { |
1cbf4c56 TR |
646 | /* |
647 | * Above Threshold? | |
648 | * ---------------- | |
649 | * If not already enabled, turn ON all cooling devices | |
650 | * associated with this active threshold. | |
651 | */ | |
1da177e4 | 652 | if (active->temperature > maxtemp) |
1cbf4c56 TR |
653 | tz->state.active_index = i; |
654 | maxtemp = active->temperature; | |
655 | if (active->flags.enabled) | |
656 | continue; | |
1da177e4 | 657 | for (j = 0; j < active->devices.count; j++) { |
4be44fcd LB |
658 | result = |
659 | acpi_bus_set_power(active->devices. | |
660 | handles[j], | |
1cbf4c56 | 661 | ACPI_STATE_D0); |
1da177e4 | 662 | if (result) { |
cece9296 LB |
663 | printk(KERN_WARNING PREFIX |
664 | "Unable to turn cooling device [%p] 'on'\n", | |
a6fc6720 | 665 | active->devices. |
cece9296 | 666 | handles[j]); |
1da177e4 LT |
667 | continue; |
668 | } | |
1cbf4c56 | 669 | active->flags.enabled = 1; |
4be44fcd | 670 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
1cbf4c56 | 671 | "Cooling device [%p] now 'on'\n", |
4be44fcd | 672 | active->devices.handles[j])); |
1da177e4 | 673 | } |
1cbf4c56 TR |
674 | continue; |
675 | } | |
676 | if (!active->flags.enabled) | |
677 | continue; | |
678 | /* | |
679 | * Below Threshold? | |
680 | * ---------------- | |
681 | * Turn OFF all cooling devices associated with this | |
682 | * threshold. | |
683 | */ | |
684 | for (j = 0; j < active->devices.count; j++) { | |
685 | result = acpi_bus_set_power(active->devices.handles[j], | |
686 | ACPI_STATE_D3); | |
687 | if (result) { | |
cece9296 LB |
688 | printk(KERN_WARNING PREFIX |
689 | "Unable to turn cooling device [%p] 'off'\n", | |
690 | active->devices.handles[j]); | |
1cbf4c56 TR |
691 | continue; |
692 | } | |
693 | active->flags.enabled = 0; | |
694 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
695 | "Cooling device [%p] now 'off'\n", | |
696 | active->devices.handles[j])); | |
1da177e4 LT |
697 | } |
698 | } | |
1da177e4 LT |
699 | } |
700 | ||
4be44fcd | 701 | static void acpi_thermal_check(void *context); |
1da177e4 | 702 | |
4be44fcd | 703 | static void acpi_thermal_run(unsigned long data) |
1da177e4 LT |
704 | { |
705 | struct acpi_thermal *tz = (struct acpi_thermal *)data; | |
706 | if (!tz->zombie) | |
b8d35192 | 707 | acpi_os_execute(OSL_GPE_HANDLER, acpi_thermal_check, (void *)data); |
1da177e4 LT |
708 | } |
709 | ||
4be44fcd | 710 | static void acpi_thermal_check(void *data) |
1da177e4 | 711 | { |
4be44fcd | 712 | int result = 0; |
50dd0969 | 713 | struct acpi_thermal *tz = data; |
4be44fcd | 714 | unsigned long sleep_time = 0; |
21bc42ab | 715 | unsigned long timeout_jiffies = 0; |
4be44fcd | 716 | int i = 0; |
1da177e4 LT |
717 | struct acpi_thermal_state state; |
718 | ||
1da177e4 LT |
719 | |
720 | if (!tz) { | |
6468463a | 721 | printk(KERN_ERR PREFIX "Invalid (NULL) context\n"); |
d550d98d | 722 | return; |
1da177e4 LT |
723 | } |
724 | ||
6e215785 AS |
725 | /* Check if someone else is already running */ |
726 | if (!mutex_trylock(&tz->lock)) | |
727 | return; | |
728 | ||
1da177e4 LT |
729 | state = tz->state; |
730 | ||
731 | result = acpi_thermal_get_temperature(tz); | |
732 | if (result) | |
6e215785 | 733 | goto unlock; |
4be44fcd | 734 | |
1da177e4 | 735 | memset(&tz->state, 0, sizeof(tz->state)); |
4be44fcd | 736 | |
1da177e4 LT |
737 | /* |
738 | * Check Trip Points | |
739 | * ----------------- | |
740 | * Compare the current temperature to the trip point values to see | |
741 | * if we've entered one of the thermal policy states. Note that | |
742 | * this function determines when a state is entered, but the | |
743 | * individual policy decides when it is exited (e.g. hysteresis). | |
744 | */ | |
745 | if (tz->trips.critical.flags.valid) | |
4be44fcd LB |
746 | state.critical |= |
747 | (tz->temperature >= tz->trips.critical.temperature); | |
1da177e4 LT |
748 | if (tz->trips.hot.flags.valid) |
749 | state.hot |= (tz->temperature >= tz->trips.hot.temperature); | |
750 | if (tz->trips.passive.flags.valid) | |
4be44fcd LB |
751 | state.passive |= |
752 | (tz->temperature >= tz->trips.passive.temperature); | |
753 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) | |
1da177e4 | 754 | if (tz->trips.active[i].flags.valid) |
4be44fcd LB |
755 | state.active |= |
756 | (tz->temperature >= | |
757 | tz->trips.active[i].temperature); | |
1da177e4 LT |
758 | |
759 | /* | |
760 | * Invoke Policy | |
761 | * ------------- | |
762 | * Separated from the above check to allow individual policy to | |
763 | * determine when to exit a given state. | |
764 | */ | |
765 | if (state.critical) | |
766 | acpi_thermal_critical(tz); | |
767 | if (state.hot) | |
768 | acpi_thermal_hot(tz); | |
769 | if (state.passive) | |
770 | acpi_thermal_passive(tz); | |
771 | if (state.active) | |
772 | acpi_thermal_active(tz); | |
773 | ||
774 | /* | |
775 | * Calculate State | |
776 | * --------------- | |
777 | * Again, separated from the above two to allow independent policy | |
778 | * decisions. | |
779 | */ | |
1cbf4c56 TR |
780 | tz->state.critical = tz->trips.critical.flags.enabled; |
781 | tz->state.hot = tz->trips.hot.flags.enabled; | |
782 | tz->state.passive = tz->trips.passive.flags.enabled; | |
783 | tz->state.active = 0; | |
4be44fcd | 784 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) |
1cbf4c56 | 785 | tz->state.active |= tz->trips.active[i].flags.enabled; |
1da177e4 LT |
786 | |
787 | /* | |
788 | * Calculate Sleep Time | |
789 | * -------------------- | |
790 | * If we're in the passive state, use _TSP's value. Otherwise | |
791 | * use the default polling frequency (e.g. _TZP). If no polling | |
792 | * frequency is specified then we'll wait forever (at least until | |
793 | * a thermal event occurs). Note that _TSP and _TZD values are | |
794 | * given in 1/10th seconds (we must covert to milliseconds). | |
795 | */ | |
21bc42ab | 796 | if (tz->state.passive) { |
1da177e4 | 797 | sleep_time = tz->trips.passive.tsp * 100; |
21bc42ab LB |
798 | timeout_jiffies = jiffies + (HZ * sleep_time) / 1000; |
799 | } else if (tz->polling_frequency > 0) { | |
1da177e4 | 800 | sleep_time = tz->polling_frequency * 100; |
21bc42ab LB |
801 | timeout_jiffies = round_jiffies(jiffies + (HZ * sleep_time) / 1000); |
802 | } | |
1da177e4 | 803 | |
4be44fcd LB |
804 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s: temperature[%lu] sleep[%lu]\n", |
805 | tz->name, tz->temperature, sleep_time)); | |
1da177e4 LT |
806 | |
807 | /* | |
808 | * Schedule Next Poll | |
809 | * ------------------ | |
810 | */ | |
811 | if (!sleep_time) { | |
812 | if (timer_pending(&(tz->timer))) | |
813 | del_timer(&(tz->timer)); | |
4be44fcd | 814 | } else { |
1da177e4 | 815 | if (timer_pending(&(tz->timer))) |
21bc42ab | 816 | mod_timer(&(tz->timer), timeout_jiffies); |
1da177e4 | 817 | else { |
4be44fcd | 818 | tz->timer.data = (unsigned long)tz; |
1da177e4 | 819 | tz->timer.function = acpi_thermal_run; |
21bc42ab | 820 | tz->timer.expires = timeout_jiffies; |
1da177e4 LT |
821 | add_timer(&(tz->timer)); |
822 | } | |
823 | } | |
6e215785 AS |
824 | unlock: |
825 | mutex_unlock(&tz->lock); | |
1da177e4 LT |
826 | } |
827 | ||
1da177e4 LT |
828 | /* -------------------------------------------------------------------------- |
829 | FS Interface (/proc) | |
830 | -------------------------------------------------------------------------- */ | |
831 | ||
4be44fcd | 832 | static struct proc_dir_entry *acpi_thermal_dir; |
1da177e4 LT |
833 | |
834 | static int acpi_thermal_state_seq_show(struct seq_file *seq, void *offset) | |
835 | { | |
50dd0969 | 836 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 837 | |
1da177e4 LT |
838 | |
839 | if (!tz) | |
840 | goto end; | |
841 | ||
842 | seq_puts(seq, "state: "); | |
843 | ||
4be44fcd LB |
844 | if (!tz->state.critical && !tz->state.hot && !tz->state.passive |
845 | && !tz->state.active) | |
1da177e4 LT |
846 | seq_puts(seq, "ok\n"); |
847 | else { | |
848 | if (tz->state.critical) | |
849 | seq_puts(seq, "critical "); | |
850 | if (tz->state.hot) | |
851 | seq_puts(seq, "hot "); | |
852 | if (tz->state.passive) | |
853 | seq_puts(seq, "passive "); | |
854 | if (tz->state.active) | |
855 | seq_printf(seq, "active[%d]", tz->state.active_index); | |
856 | seq_puts(seq, "\n"); | |
857 | } | |
858 | ||
4be44fcd | 859 | end: |
d550d98d | 860 | return 0; |
1da177e4 LT |
861 | } |
862 | ||
863 | static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file) | |
864 | { | |
865 | return single_open(file, acpi_thermal_state_seq_show, PDE(inode)->data); | |
866 | } | |
867 | ||
1da177e4 LT |
868 | static int acpi_thermal_temp_seq_show(struct seq_file *seq, void *offset) |
869 | { | |
4be44fcd | 870 | int result = 0; |
50dd0969 | 871 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 872 | |
1da177e4 LT |
873 | |
874 | if (!tz) | |
875 | goto end; | |
876 | ||
877 | result = acpi_thermal_get_temperature(tz); | |
878 | if (result) | |
879 | goto end; | |
880 | ||
4be44fcd LB |
881 | seq_printf(seq, "temperature: %ld C\n", |
882 | KELVIN_TO_CELSIUS(tz->temperature)); | |
1da177e4 | 883 | |
4be44fcd | 884 | end: |
d550d98d | 885 | return 0; |
1da177e4 LT |
886 | } |
887 | ||
888 | static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file) | |
889 | { | |
890 | return single_open(file, acpi_thermal_temp_seq_show, PDE(inode)->data); | |
891 | } | |
892 | ||
1da177e4 LT |
893 | static int acpi_thermal_trip_seq_show(struct seq_file *seq, void *offset) |
894 | { | |
50dd0969 | 895 | struct acpi_thermal *tz = seq->private; |
68ccfaa8 | 896 | struct acpi_device *device; |
e7c746ef TR |
897 | acpi_status status; |
898 | ||
4be44fcd LB |
899 | int i = 0; |
900 | int j = 0; | |
1da177e4 | 901 | |
1da177e4 LT |
902 | |
903 | if (!tz) | |
904 | goto end; | |
905 | ||
906 | if (tz->trips.critical.flags.valid) | |
f5487145 LB |
907 | seq_printf(seq, "critical (S5): %ld C%s", |
908 | KELVIN_TO_CELSIUS(tz->trips.critical.temperature), | |
909 | nocrt ? " <disabled>\n" : "\n"); | |
1da177e4 LT |
910 | |
911 | if (tz->trips.hot.flags.valid) | |
f5487145 LB |
912 | seq_printf(seq, "hot (S4): %ld C%s", |
913 | KELVIN_TO_CELSIUS(tz->trips.hot.temperature), | |
914 | nocrt ? " <disabled>\n" : "\n"); | |
1da177e4 LT |
915 | |
916 | if (tz->trips.passive.flags.valid) { | |
4be44fcd LB |
917 | seq_printf(seq, |
918 | "passive: %ld C: tc1=%lu tc2=%lu tsp=%lu devices=", | |
919 | KELVIN_TO_CELSIUS(tz->trips.passive.temperature), | |
920 | tz->trips.passive.tc1, tz->trips.passive.tc2, | |
921 | tz->trips.passive.tsp); | |
922 | for (j = 0; j < tz->trips.passive.devices.count; j++) { | |
e7c746ef TR |
923 | status = acpi_bus_get_device(tz->trips.passive.devices. |
924 | handles[j], &device); | |
925 | seq_printf(seq, "%4.4s ", status ? "" : | |
926 | acpi_device_bid(device)); | |
1da177e4 LT |
927 | } |
928 | seq_puts(seq, "\n"); | |
929 | } | |
930 | ||
931 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { | |
932 | if (!(tz->trips.active[i].flags.valid)) | |
933 | break; | |
934 | seq_printf(seq, "active[%d]: %ld C: devices=", | |
4be44fcd LB |
935 | i, |
936 | KELVIN_TO_CELSIUS(tz->trips.active[i].temperature)); | |
68ccfaa8 | 937 | for (j = 0; j < tz->trips.active[i].devices.count; j++){ |
e7c746ef TR |
938 | status = acpi_bus_get_device(tz->trips.active[i]. |
939 | devices.handles[j], | |
940 | &device); | |
941 | seq_printf(seq, "%4.4s ", status ? "" : | |
942 | acpi_device_bid(device)); | |
68ccfaa8 | 943 | } |
1da177e4 LT |
944 | seq_puts(seq, "\n"); |
945 | } | |
946 | ||
4be44fcd | 947 | end: |
d550d98d | 948 | return 0; |
1da177e4 LT |
949 | } |
950 | ||
951 | static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file) | |
952 | { | |
953 | return single_open(file, acpi_thermal_trip_seq_show, PDE(inode)->data); | |
954 | } | |
955 | ||
1da177e4 LT |
956 | static int acpi_thermal_cooling_seq_show(struct seq_file *seq, void *offset) |
957 | { | |
50dd0969 | 958 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 959 | |
1da177e4 LT |
960 | |
961 | if (!tz) | |
962 | goto end; | |
963 | ||
eaca2d3f | 964 | if (!tz->flags.cooling_mode) |
1da177e4 | 965 | seq_puts(seq, "<setting not supported>\n"); |
1da177e4 | 966 | else |
eaca2d3f | 967 | seq_puts(seq, "0 - Active; 1 - Passive\n"); |
1da177e4 | 968 | |
4be44fcd | 969 | end: |
d550d98d | 970 | return 0; |
1da177e4 LT |
971 | } |
972 | ||
973 | static int acpi_thermal_cooling_open_fs(struct inode *inode, struct file *file) | |
974 | { | |
975 | return single_open(file, acpi_thermal_cooling_seq_show, | |
4be44fcd | 976 | PDE(inode)->data); |
1da177e4 LT |
977 | } |
978 | ||
979 | static ssize_t | |
4be44fcd LB |
980 | acpi_thermal_write_cooling_mode(struct file *file, |
981 | const char __user * buffer, | |
982 | size_t count, loff_t * ppos) | |
1da177e4 | 983 | { |
50dd0969 JE |
984 | struct seq_file *m = file->private_data; |
985 | struct acpi_thermal *tz = m->private; | |
4be44fcd LB |
986 | int result = 0; |
987 | char mode_string[12] = { '\0' }; | |
1da177e4 | 988 | |
1da177e4 LT |
989 | |
990 | if (!tz || (count > sizeof(mode_string) - 1)) | |
d550d98d | 991 | return -EINVAL; |
1da177e4 LT |
992 | |
993 | if (!tz->flags.cooling_mode) | |
d550d98d | 994 | return -ENODEV; |
1da177e4 LT |
995 | |
996 | if (copy_from_user(mode_string, buffer, count)) | |
d550d98d | 997 | return -EFAULT; |
4be44fcd | 998 | |
1da177e4 | 999 | mode_string[count] = '\0'; |
4be44fcd LB |
1000 | |
1001 | result = acpi_thermal_set_cooling_mode(tz, | |
1002 | simple_strtoul(mode_string, NULL, | |
1003 | 0)); | |
1da177e4 | 1004 | if (result) |
d550d98d | 1005 | return result; |
1da177e4 LT |
1006 | |
1007 | acpi_thermal_check(tz); | |
1008 | ||
d550d98d | 1009 | return count; |
1da177e4 LT |
1010 | } |
1011 | ||
1da177e4 LT |
1012 | static int acpi_thermal_polling_seq_show(struct seq_file *seq, void *offset) |
1013 | { | |
50dd0969 | 1014 | struct acpi_thermal *tz = seq->private; |
1da177e4 | 1015 | |
1da177e4 LT |
1016 | |
1017 | if (!tz) | |
1018 | goto end; | |
1019 | ||
1020 | if (!tz->polling_frequency) { | |
1021 | seq_puts(seq, "<polling disabled>\n"); | |
1022 | goto end; | |
1023 | } | |
1024 | ||
1025 | seq_printf(seq, "polling frequency: %lu seconds\n", | |
4be44fcd | 1026 | (tz->polling_frequency / 10)); |
1da177e4 | 1027 | |
4be44fcd | 1028 | end: |
d550d98d | 1029 | return 0; |
1da177e4 LT |
1030 | } |
1031 | ||
1032 | static int acpi_thermal_polling_open_fs(struct inode *inode, struct file *file) | |
1033 | { | |
1034 | return single_open(file, acpi_thermal_polling_seq_show, | |
4be44fcd | 1035 | PDE(inode)->data); |
1da177e4 LT |
1036 | } |
1037 | ||
1038 | static ssize_t | |
4be44fcd LB |
1039 | acpi_thermal_write_polling(struct file *file, |
1040 | const char __user * buffer, | |
1041 | size_t count, loff_t * ppos) | |
1da177e4 | 1042 | { |
50dd0969 JE |
1043 | struct seq_file *m = file->private_data; |
1044 | struct acpi_thermal *tz = m->private; | |
4be44fcd LB |
1045 | int result = 0; |
1046 | char polling_string[12] = { '\0' }; | |
1047 | int seconds = 0; | |
1da177e4 | 1048 | |
1da177e4 LT |
1049 | |
1050 | if (!tz || (count > sizeof(polling_string) - 1)) | |
d550d98d | 1051 | return -EINVAL; |
4be44fcd | 1052 | |
1da177e4 | 1053 | if (copy_from_user(polling_string, buffer, count)) |
d550d98d | 1054 | return -EFAULT; |
4be44fcd | 1055 | |
1da177e4 LT |
1056 | polling_string[count] = '\0'; |
1057 | ||
1058 | seconds = simple_strtoul(polling_string, NULL, 0); | |
4be44fcd | 1059 | |
1da177e4 LT |
1060 | result = acpi_thermal_set_polling(tz, seconds); |
1061 | if (result) | |
d550d98d | 1062 | return result; |
1da177e4 LT |
1063 | |
1064 | acpi_thermal_check(tz); | |
1065 | ||
d550d98d | 1066 | return count; |
1da177e4 LT |
1067 | } |
1068 | ||
4be44fcd | 1069 | static int acpi_thermal_add_fs(struct acpi_device *device) |
1da177e4 | 1070 | { |
4be44fcd | 1071 | struct proc_dir_entry *entry = NULL; |
1da177e4 | 1072 | |
1da177e4 LT |
1073 | |
1074 | if (!acpi_device_dir(device)) { | |
1075 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 1076 | acpi_thermal_dir); |
1da177e4 | 1077 | if (!acpi_device_dir(device)) |
d550d98d | 1078 | return -ENODEV; |
1da177e4 LT |
1079 | acpi_device_dir(device)->owner = THIS_MODULE; |
1080 | } | |
1081 | ||
1082 | /* 'state' [R] */ | |
1083 | entry = create_proc_entry(ACPI_THERMAL_FILE_STATE, | |
4be44fcd | 1084 | S_IRUGO, acpi_device_dir(device)); |
1da177e4 | 1085 | if (!entry) |
d550d98d | 1086 | return -ENODEV; |
1da177e4 LT |
1087 | else { |
1088 | entry->proc_fops = &acpi_thermal_state_fops; | |
1089 | entry->data = acpi_driver_data(device); | |
1090 | entry->owner = THIS_MODULE; | |
1091 | } | |
1092 | ||
1093 | /* 'temperature' [R] */ | |
1094 | entry = create_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE, | |
4be44fcd | 1095 | S_IRUGO, acpi_device_dir(device)); |
1da177e4 | 1096 | if (!entry) |
d550d98d | 1097 | return -ENODEV; |
1da177e4 LT |
1098 | else { |
1099 | entry->proc_fops = &acpi_thermal_temp_fops; | |
1100 | entry->data = acpi_driver_data(device); | |
1101 | entry->owner = THIS_MODULE; | |
1102 | } | |
1103 | ||
2db9ccba | 1104 | /* 'trip_points' [R] */ |
1da177e4 | 1105 | entry = create_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS, |
2db9ccba | 1106 | S_IRUGO, |
4be44fcd | 1107 | acpi_device_dir(device)); |
1da177e4 | 1108 | if (!entry) |
d550d98d | 1109 | return -ENODEV; |
1da177e4 LT |
1110 | else { |
1111 | entry->proc_fops = &acpi_thermal_trip_fops; | |
1112 | entry->data = acpi_driver_data(device); | |
1113 | entry->owner = THIS_MODULE; | |
1114 | } | |
1115 | ||
1116 | /* 'cooling_mode' [R/W] */ | |
1117 | entry = create_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE, | |
4be44fcd LB |
1118 | S_IFREG | S_IRUGO | S_IWUSR, |
1119 | acpi_device_dir(device)); | |
1da177e4 | 1120 | if (!entry) |
d550d98d | 1121 | return -ENODEV; |
1da177e4 LT |
1122 | else { |
1123 | entry->proc_fops = &acpi_thermal_cooling_fops; | |
1124 | entry->data = acpi_driver_data(device); | |
1125 | entry->owner = THIS_MODULE; | |
1126 | } | |
1127 | ||
1128 | /* 'polling_frequency' [R/W] */ | |
1129 | entry = create_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ, | |
4be44fcd LB |
1130 | S_IFREG | S_IRUGO | S_IWUSR, |
1131 | acpi_device_dir(device)); | |
1da177e4 | 1132 | if (!entry) |
d550d98d | 1133 | return -ENODEV; |
1da177e4 LT |
1134 | else { |
1135 | entry->proc_fops = &acpi_thermal_polling_fops; | |
1136 | entry->data = acpi_driver_data(device); | |
1137 | entry->owner = THIS_MODULE; | |
1138 | } | |
1139 | ||
d550d98d | 1140 | return 0; |
1da177e4 LT |
1141 | } |
1142 | ||
4be44fcd | 1143 | static int acpi_thermal_remove_fs(struct acpi_device *device) |
1da177e4 | 1144 | { |
1da177e4 LT |
1145 | |
1146 | if (acpi_device_dir(device)) { | |
1147 | remove_proc_entry(ACPI_THERMAL_FILE_POLLING_FREQ, | |
1148 | acpi_device_dir(device)); | |
1149 | remove_proc_entry(ACPI_THERMAL_FILE_COOLING_MODE, | |
1150 | acpi_device_dir(device)); | |
1151 | remove_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS, | |
1152 | acpi_device_dir(device)); | |
1153 | remove_proc_entry(ACPI_THERMAL_FILE_TEMPERATURE, | |
1154 | acpi_device_dir(device)); | |
1155 | remove_proc_entry(ACPI_THERMAL_FILE_STATE, | |
1156 | acpi_device_dir(device)); | |
1157 | remove_proc_entry(acpi_device_bid(device), acpi_thermal_dir); | |
1158 | acpi_device_dir(device) = NULL; | |
1159 | } | |
1160 | ||
d550d98d | 1161 | return 0; |
1da177e4 LT |
1162 | } |
1163 | ||
1da177e4 LT |
1164 | /* -------------------------------------------------------------------------- |
1165 | Driver Interface | |
1166 | -------------------------------------------------------------------------- */ | |
1167 | ||
4be44fcd | 1168 | static void acpi_thermal_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 1169 | { |
50dd0969 | 1170 | struct acpi_thermal *tz = data; |
4be44fcd | 1171 | struct acpi_device *device = NULL; |
1da177e4 | 1172 | |
1da177e4 LT |
1173 | |
1174 | if (!tz) | |
d550d98d | 1175 | return; |
1da177e4 | 1176 | |
8348e1b1 | 1177 | device = tz->device; |
1da177e4 LT |
1178 | |
1179 | switch (event) { | |
1180 | case ACPI_THERMAL_NOTIFY_TEMPERATURE: | |
1181 | acpi_thermal_check(tz); | |
1182 | break; | |
1183 | case ACPI_THERMAL_NOTIFY_THRESHOLDS: | |
1184 | acpi_thermal_get_trip_points(tz); | |
1185 | acpi_thermal_check(tz); | |
14e04fb3 | 1186 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca ZR |
1187 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
1188 | device->dev.bus_id, event, 0); | |
1da177e4 LT |
1189 | break; |
1190 | case ACPI_THERMAL_NOTIFY_DEVICES: | |
1191 | if (tz->flags.devices) | |
1192 | acpi_thermal_get_devices(tz); | |
14e04fb3 | 1193 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca ZR |
1194 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
1195 | device->dev.bus_id, event, 0); | |
1da177e4 LT |
1196 | break; |
1197 | default: | |
1198 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1199 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1200 | break; |
1201 | } | |
1202 | ||
d550d98d | 1203 | return; |
1da177e4 LT |
1204 | } |
1205 | ||
4be44fcd | 1206 | static int acpi_thermal_get_info(struct acpi_thermal *tz) |
1da177e4 | 1207 | { |
4be44fcd | 1208 | int result = 0; |
1da177e4 | 1209 | |
1da177e4 LT |
1210 | |
1211 | if (!tz) | |
d550d98d | 1212 | return -EINVAL; |
1da177e4 LT |
1213 | |
1214 | /* Get temperature [_TMP] (required) */ | |
1215 | result = acpi_thermal_get_temperature(tz); | |
1216 | if (result) | |
d550d98d | 1217 | return result; |
1da177e4 LT |
1218 | |
1219 | /* Get trip points [_CRT, _PSV, etc.] (required) */ | |
1220 | result = acpi_thermal_get_trip_points(tz); | |
1221 | if (result) | |
d550d98d | 1222 | return result; |
1da177e4 LT |
1223 | |
1224 | /* Set the cooling mode [_SCP] to active cooling (default) */ | |
1225 | result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE); | |
4be44fcd | 1226 | if (!result) |
1da177e4 | 1227 | tz->flags.cooling_mode = 1; |
1da177e4 LT |
1228 | |
1229 | /* Get default polling frequency [_TZP] (optional) */ | |
1230 | if (tzp) | |
1231 | tz->polling_frequency = tzp; | |
1232 | else | |
1233 | acpi_thermal_get_polling_frequency(tz); | |
1234 | ||
1235 | /* Get devices in this thermal zone [_TZD] (optional) */ | |
1236 | result = acpi_thermal_get_devices(tz); | |
1237 | if (!result) | |
1238 | tz->flags.devices = 1; | |
1239 | ||
d550d98d | 1240 | return 0; |
1da177e4 LT |
1241 | } |
1242 | ||
4be44fcd | 1243 | static int acpi_thermal_add(struct acpi_device *device) |
1da177e4 | 1244 | { |
4be44fcd LB |
1245 | int result = 0; |
1246 | acpi_status status = AE_OK; | |
1247 | struct acpi_thermal *tz = NULL; | |
1da177e4 | 1248 | |
1da177e4 LT |
1249 | |
1250 | if (!device) | |
d550d98d | 1251 | return -EINVAL; |
1da177e4 | 1252 | |
36bcbec7 | 1253 | tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL); |
1da177e4 | 1254 | if (!tz) |
d550d98d | 1255 | return -ENOMEM; |
1da177e4 | 1256 | |
8348e1b1 | 1257 | tz->device = device; |
1da177e4 LT |
1258 | strcpy(tz->name, device->pnp.bus_id); |
1259 | strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME); | |
1260 | strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS); | |
1261 | acpi_driver_data(device) = tz; | |
6e215785 | 1262 | mutex_init(&tz->lock); |
1da177e4 LT |
1263 | result = acpi_thermal_get_info(tz); |
1264 | if (result) | |
1265 | goto end; | |
1266 | ||
1267 | result = acpi_thermal_add_fs(device); | |
1268 | if (result) | |
09047e75 | 1269 | goto end; |
1da177e4 LT |
1270 | |
1271 | init_timer(&tz->timer); | |
1272 | ||
1273 | acpi_thermal_check(tz); | |
1274 | ||
38ba7c9e | 1275 | status = acpi_install_notify_handler(device->handle, |
4be44fcd LB |
1276 | ACPI_DEVICE_NOTIFY, |
1277 | acpi_thermal_notify, tz); | |
1da177e4 | 1278 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
1279 | result = -ENODEV; |
1280 | goto end; | |
1281 | } | |
1282 | ||
1283 | printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n", | |
4be44fcd LB |
1284 | acpi_device_name(device), acpi_device_bid(device), |
1285 | KELVIN_TO_CELSIUS(tz->temperature)); | |
1da177e4 | 1286 | |
4be44fcd | 1287 | end: |
1da177e4 LT |
1288 | if (result) { |
1289 | acpi_thermal_remove_fs(device); | |
1290 | kfree(tz); | |
1291 | } | |
1292 | ||
d550d98d | 1293 | return result; |
1da177e4 LT |
1294 | } |
1295 | ||
4be44fcd | 1296 | static int acpi_thermal_remove(struct acpi_device *device, int type) |
1da177e4 | 1297 | { |
4be44fcd LB |
1298 | acpi_status status = AE_OK; |
1299 | struct acpi_thermal *tz = NULL; | |
1da177e4 | 1300 | |
1da177e4 LT |
1301 | |
1302 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1303 | return -EINVAL; |
1da177e4 | 1304 | |
50dd0969 | 1305 | tz = acpi_driver_data(device); |
1da177e4 LT |
1306 | |
1307 | /* avoid timer adding new defer task */ | |
1308 | tz->zombie = 1; | |
1309 | /* wait for running timer (on other CPUs) finish */ | |
1310 | del_timer_sync(&(tz->timer)); | |
1311 | /* synchronize deferred task */ | |
1312 | acpi_os_wait_events_complete(NULL); | |
1313 | /* deferred task may reinsert timer */ | |
1314 | del_timer_sync(&(tz->timer)); | |
1315 | ||
38ba7c9e | 1316 | status = acpi_remove_notify_handler(device->handle, |
4be44fcd LB |
1317 | ACPI_DEVICE_NOTIFY, |
1318 | acpi_thermal_notify); | |
1da177e4 LT |
1319 | |
1320 | /* Terminate policy */ | |
4be44fcd | 1321 | if (tz->trips.passive.flags.valid && tz->trips.passive.flags.enabled) { |
1da177e4 LT |
1322 | tz->trips.passive.flags.enabled = 0; |
1323 | acpi_thermal_passive(tz); | |
1324 | } | |
1325 | if (tz->trips.active[0].flags.valid | |
4be44fcd | 1326 | && tz->trips.active[0].flags.enabled) { |
1da177e4 LT |
1327 | tz->trips.active[0].flags.enabled = 0; |
1328 | acpi_thermal_active(tz); | |
1329 | } | |
1330 | ||
1331 | acpi_thermal_remove_fs(device); | |
6e215785 | 1332 | mutex_destroy(&tz->lock); |
1da177e4 | 1333 | kfree(tz); |
d550d98d | 1334 | return 0; |
1da177e4 LT |
1335 | } |
1336 | ||
5d9464a4 | 1337 | static int acpi_thermal_resume(struct acpi_device *device) |
74ce1468 KK |
1338 | { |
1339 | struct acpi_thermal *tz = NULL; | |
b1028c54 KK |
1340 | int i, j, power_state, result; |
1341 | ||
74ce1468 KK |
1342 | |
1343 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 1344 | return -EINVAL; |
74ce1468 | 1345 | |
50dd0969 | 1346 | tz = acpi_driver_data(device); |
74ce1468 | 1347 | |
bed936f7 | 1348 | for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) { |
b1028c54 KK |
1349 | if (!(&tz->trips.active[i])) |
1350 | break; | |
1351 | if (!tz->trips.active[i].flags.valid) | |
1352 | break; | |
1353 | tz->trips.active[i].flags.enabled = 1; | |
1354 | for (j = 0; j < tz->trips.active[i].devices.count; j++) { | |
1355 | result = acpi_bus_get_power(tz->trips.active[i].devices. | |
1356 | handles[j], &power_state); | |
1357 | if (result || (power_state != ACPI_STATE_D0)) { | |
1358 | tz->trips.active[i].flags.enabled = 0; | |
1359 | break; | |
1360 | } | |
bed936f7 | 1361 | } |
b1028c54 | 1362 | tz->state.active |= tz->trips.active[i].flags.enabled; |
bed936f7 KK |
1363 | } |
1364 | ||
b1028c54 | 1365 | acpi_thermal_check(tz); |
74ce1468 KK |
1366 | |
1367 | return AE_OK; | |
1368 | } | |
1369 | ||
0b5bfa1c | 1370 | #ifdef CONFIG_DMI |
1855256c | 1371 | static int thermal_act(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1372 | |
1373 | if (act == 0) { | |
1374 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1375 | "disabling all active thermal trip points\n", d->ident); | |
1376 | act = -1; | |
1377 | } | |
1378 | return 0; | |
1379 | } | |
1855256c | 1380 | static int thermal_nocrt(const struct dmi_system_id *d) { |
8c99fdce LB |
1381 | |
1382 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1383 | "disabling all critical thermal trip point actions.\n", d->ident); | |
1384 | nocrt = 1; | |
1385 | return 0; | |
1386 | } | |
1855256c | 1387 | static int thermal_tzp(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1388 | |
1389 | if (tzp == 0) { | |
1390 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1391 | "enabling thermal zone polling\n", d->ident); | |
1392 | tzp = 300; /* 300 dS = 30 Seconds */ | |
1393 | } | |
1394 | return 0; | |
1395 | } | |
1855256c | 1396 | static int thermal_psv(const struct dmi_system_id *d) { |
0b5bfa1c LB |
1397 | |
1398 | if (psv == 0) { | |
1399 | printk(KERN_NOTICE "ACPI: %s detected: " | |
1400 | "disabling all passive thermal trip points\n", d->ident); | |
1401 | psv = -1; | |
1402 | } | |
1403 | return 0; | |
1404 | } | |
1405 | ||
1406 | static struct dmi_system_id thermal_dmi_table[] __initdata = { | |
1407 | /* | |
1408 | * Award BIOS on this AOpen makes thermal control almost worthless. | |
1409 | * http://bugzilla.kernel.org/show_bug.cgi?id=8842 | |
1410 | */ | |
1411 | { | |
1412 | .callback = thermal_act, | |
1413 | .ident = "AOpen i915GMm-HFS", | |
1414 | .matches = { | |
1415 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1416 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1417 | }, | |
1418 | }, | |
1419 | { | |
1420 | .callback = thermal_psv, | |
1421 | .ident = "AOpen i915GMm-HFS", | |
1422 | .matches = { | |
1423 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1424 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1425 | }, | |
1426 | }, | |
1427 | { | |
1428 | .callback = thermal_tzp, | |
1429 | .ident = "AOpen i915GMm-HFS", | |
1430 | .matches = { | |
1431 | DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), | |
1432 | DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), | |
1433 | }, | |
1434 | }, | |
8c99fdce LB |
1435 | { |
1436 | .callback = thermal_nocrt, | |
1437 | .ident = "Gigabyte GA-7ZX", | |
1438 | .matches = { | |
1439 | DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."), | |
1440 | DMI_MATCH(DMI_BOARD_NAME, "7ZX"), | |
1441 | }, | |
1442 | }, | |
0b5bfa1c LB |
1443 | {} |
1444 | }; | |
1445 | #endif /* CONFIG_DMI */ | |
1446 | ||
4be44fcd | 1447 | static int __init acpi_thermal_init(void) |
1da177e4 | 1448 | { |
4be44fcd | 1449 | int result = 0; |
1da177e4 | 1450 | |
0b5bfa1c LB |
1451 | dmi_check_system(thermal_dmi_table); |
1452 | ||
72b33ef8 LB |
1453 | if (off) { |
1454 | printk(KERN_NOTICE "ACPI: thermal control disabled\n"); | |
1455 | return -ENODEV; | |
1456 | } | |
1da177e4 LT |
1457 | acpi_thermal_dir = proc_mkdir(ACPI_THERMAL_CLASS, acpi_root_dir); |
1458 | if (!acpi_thermal_dir) | |
d550d98d | 1459 | return -ENODEV; |
1da177e4 LT |
1460 | acpi_thermal_dir->owner = THIS_MODULE; |
1461 | ||
1462 | result = acpi_bus_register_driver(&acpi_thermal_driver); | |
1463 | if (result < 0) { | |
1464 | remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir); | |
d550d98d | 1465 | return -ENODEV; |
1da177e4 LT |
1466 | } |
1467 | ||
d550d98d | 1468 | return 0; |
1da177e4 LT |
1469 | } |
1470 | ||
4be44fcd | 1471 | static void __exit acpi_thermal_exit(void) |
1da177e4 | 1472 | { |
1da177e4 LT |
1473 | |
1474 | acpi_bus_unregister_driver(&acpi_thermal_driver); | |
1475 | ||
1476 | remove_proc_entry(ACPI_THERMAL_CLASS, acpi_root_dir); | |
1477 | ||
d550d98d | 1478 | return; |
1da177e4 LT |
1479 | } |
1480 | ||
1da177e4 LT |
1481 | module_init(acpi_thermal_init); |
1482 | module_exit(acpi_thermal_exit); |