blob: 804204d41999d0af951086f25b37a2f7ee783a90 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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>
Len Brown0b5bfa12007-08-12 00:13:02 -040036#include <linux/dmi.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#include <linux/init.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090038#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#include <linux/types.h>
Tim Schmielaucd354f12007-02-14 00:33:14 -080040#include <linux/jiffies.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070041#include <linux/kmod.h>
Jeremy Fitzhardinge10a0a8d2007-07-17 18:37:02 -070042#include <linux/reboot.h>
Stephen Rothwellf6f5c452009-03-03 12:47:17 +110043#include <linux/device.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070044#include <asm/uaccess.h>
Zhang Rui3f655ef2008-01-17 15:51:11 +080045#include <linux/thermal.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070046#include <acpi/acpi_bus.h>
47#include <acpi/acpi_drivers.h>
48
Len Browna192a952009-07-28 16:45:54 -040049#define PREFIX "ACPI: "
50
Linus Torvalds1da177e2005-04-16 15:20:36 -070051#define ACPI_THERMAL_CLASS "thermal_zone"
Linus Torvalds1da177e2005-04-16 15:20:36 -070052#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
Linus Torvalds1da177e2005-04-16 15:20:36 -070064
65#define ACPI_THERMAL_MAX_ACTIVE 10
66#define ACPI_THERMAL_MAX_LIMIT_STR_LEN 65
67
Linus Torvalds1da177e2005-04-16 15:20:36 -070068#define _COMPONENT ACPI_THERMAL_COMPONENT
Len Brownf52fd662007-02-12 22:42:12 -050069ACPI_MODULE_NAME("thermal");
Linus Torvalds1da177e2005-04-16 15:20:36 -070070
Thomas Renninger1cbf4c52004-09-16 11:07:00 -040071MODULE_AUTHOR("Paul Diefenbaugh");
Len Brown7cda93e2007-02-12 23:50:02 -050072MODULE_DESCRIPTION("ACPI Thermal Zone Driver");
Linus Torvalds1da177e2005-04-16 15:20:36 -070073MODULE_LICENSE("GPL");
74
Len Brownf8707ec2007-08-12 00:12:54 -040075static int act;
76module_param(act, int, 0644);
Len Brown3c1d36d2007-08-14 15:12:56 -040077MODULE_PARM_DESC(act, "Disable or override all lowest active trip points.");
Len Brownf8707ec2007-08-12 00:12:54 -040078
Len Brownc52a7412007-08-14 15:49:32 -040079static int crt;
80module_param(crt, int, 0644);
81MODULE_PARM_DESC(crt, "Disable or lower all critical trip points.");
82
Linus Torvalds1da177e2005-04-16 15:20:36 -070083static int tzp;
Len Brown730ff342007-08-12 00:12:26 -040084module_param(tzp, int, 0444);
Len Brown3c1d36d2007-08-14 15:12:56 -040085MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.");
Linus Torvalds1da177e2005-04-16 15:20:36 -070086
Len Brownf5487142007-08-12 00:12:44 -040087static int nocrt;
88module_param(nocrt, int, 0);
Len Brown8c99fdc2007-08-20 18:46:50 -040089MODULE_PARM_DESC(nocrt, "Set to take no action upon ACPI thermal zone critical trips points.");
Len Brownf5487142007-08-12 00:12:44 -040090
Len Brown72b33ef2007-08-12 00:12:17 -040091static int off;
92module_param(off, int, 0);
Len Brown3c1d36d2007-08-14 15:12:56 -040093MODULE_PARM_DESC(off, "Set to disable ACPI thermal support.");
Len Brown72b33ef2007-08-12 00:12:17 -040094
Len Browna70cdc52007-08-12 00:12:35 -040095static int psv;
96module_param(psv, int, 0644);
Len Brown3c1d36d2007-08-14 15:12:56 -040097MODULE_PARM_DESC(psv, "Disable or override all passive trip points.");
Len Browna70cdc52007-08-12 00:12:35 -040098
Len Brown4be44fc2005-08-05 00:44:28 -040099static int acpi_thermal_add(struct acpi_device *device);
100static int acpi_thermal_remove(struct acpi_device *device, int type);
Bjorn Helgaas342d5502009-04-07 15:37:06 +0000101static void acpi_thermal_notify(struct acpi_device *device, u32 event);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102
Thomas Renninger1ba90e32007-07-23 14:44:41 +0200103static const struct acpi_device_id thermal_device_ids[] = {
104 {ACPI_THERMAL_HID, 0},
105 {"", 0},
106};
107MODULE_DEVICE_TABLE(acpi, thermal_device_ids);
108
Rafael J. Wysocki90692402012-08-09 23:00:02 +0200109#ifdef CONFIG_PM_SLEEP
Rafael J. Wysocki167cffb2012-06-27 23:26:18 +0200110static int acpi_thermal_resume(struct device *dev);
Rafael J. Wysocki90692402012-08-09 23:00:02 +0200111#endif
Rafael J. Wysocki167cffb2012-06-27 23:26:18 +0200112static SIMPLE_DEV_PM_OPS(acpi_thermal_pm, NULL, acpi_thermal_resume);
113
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114static struct acpi_driver acpi_thermal_driver = {
Len Brownc2b67052007-02-12 23:33:40 -0500115 .name = "thermal",
Len Brown4be44fc2005-08-05 00:44:28 -0400116 .class = ACPI_THERMAL_CLASS,
Thomas Renninger1ba90e32007-07-23 14:44:41 +0200117 .ids = thermal_device_ids,
Len Brown4be44fc2005-08-05 00:44:28 -0400118 .ops = {
119 .add = acpi_thermal_add,
120 .remove = acpi_thermal_remove,
Bjorn Helgaas342d5502009-04-07 15:37:06 +0000121 .notify = acpi_thermal_notify,
Len Brown4be44fc2005-08-05 00:44:28 -0400122 },
Rafael J. Wysocki167cffb2012-06-27 23:26:18 +0200123 .drv.pm = &acpi_thermal_pm,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124};
125
126struct acpi_thermal_state {
Len Brown4be44fc2005-08-05 00:44:28 -0400127 u8 critical:1;
128 u8 hot:1;
129 u8 passive:1;
130 u8 active:1;
131 u8 reserved:4;
132 int active_index;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133};
134
135struct acpi_thermal_state_flags {
Len Brown4be44fc2005-08-05 00:44:28 -0400136 u8 valid:1;
137 u8 enabled:1;
138 u8 reserved:6;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139};
140
141struct acpi_thermal_critical {
142 struct acpi_thermal_state_flags flags;
Len Brown4be44fc2005-08-05 00:44:28 -0400143 unsigned long temperature;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144};
145
146struct acpi_thermal_hot {
147 struct acpi_thermal_state_flags flags;
Len Brown4be44fc2005-08-05 00:44:28 -0400148 unsigned long temperature;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149};
150
151struct acpi_thermal_passive {
152 struct acpi_thermal_state_flags flags;
Len Brown4be44fc2005-08-05 00:44:28 -0400153 unsigned long temperature;
154 unsigned long tc1;
155 unsigned long tc2;
156 unsigned long tsp;
157 struct acpi_handle_list devices;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158};
159
160struct acpi_thermal_active {
161 struct acpi_thermal_state_flags flags;
Len Brown4be44fc2005-08-05 00:44:28 -0400162 unsigned long temperature;
163 struct acpi_handle_list devices;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164};
165
166struct acpi_thermal_trips {
167 struct acpi_thermal_critical critical;
Len Brown4be44fc2005-08-05 00:44:28 -0400168 struct acpi_thermal_hot hot;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 struct acpi_thermal_passive passive;
170 struct acpi_thermal_active active[ACPI_THERMAL_MAX_ACTIVE];
171};
172
173struct acpi_thermal_flags {
Len Brown4be44fc2005-08-05 00:44:28 -0400174 u8 cooling_mode:1; /* _SCP */
175 u8 devices:1; /* _TZD */
176 u8 reserved:6;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177};
178
179struct acpi_thermal {
Patrick Mochel8348e1b2006-05-19 16:54:40 -0400180 struct acpi_device * device;
Len Brown4be44fc2005-08-05 00:44:28 -0400181 acpi_bus_id name;
182 unsigned long temperature;
183 unsigned long last_temperature;
184 unsigned long polling_frequency;
Len Brown4be44fc2005-08-05 00:44:28 -0400185 volatile u8 zombie;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 struct acpi_thermal_flags flags;
187 struct acpi_thermal_state state;
188 struct acpi_thermal_trips trips;
Len Brown4be44fc2005-08-05 00:44:28 -0400189 struct acpi_handle_list devices;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800190 struct thermal_zone_device *thermal_zone;
191 int tz_enabled;
Jean Delvare13614e32009-04-06 16:01:46 +0200192 int kelvin_offset;
Alexey Starikovskiy6e215782007-09-01 00:11:59 +0400193 struct mutex lock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194};
195
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196/* --------------------------------------------------------------------------
197 Thermal Zone Management
198 -------------------------------------------------------------------------- */
199
Len Brown4be44fc2005-08-05 00:44:28 -0400200static int acpi_thermal_get_temperature(struct acpi_thermal *tz)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201{
Len Brown4be44fc2005-08-05 00:44:28 -0400202 acpi_status status = AE_OK;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400203 unsigned long long tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204
205 if (!tz)
Patrick Mocheld550d982006-06-27 00:41:40 -0400206 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207
208 tz->last_temperature = tz->temperature;
209
Matthew Wilcox27663c52008-10-10 02:22:59 -0400210 status = acpi_evaluate_integer(tz->device->handle, "_TMP", NULL, &tmp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 if (ACPI_FAILURE(status))
Patrick Mocheld550d982006-06-27 00:41:40 -0400212 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213
Matthew Wilcox27663c52008-10-10 02:22:59 -0400214 tz->temperature = tmp;
Len Brown4be44fc2005-08-05 00:44:28 -0400215 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Temperature is %lu dK\n",
216 tz->temperature));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217
Patrick Mocheld550d982006-06-27 00:41:40 -0400218 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219}
220
Len Brown4be44fc2005-08-05 00:44:28 -0400221static int acpi_thermal_get_polling_frequency(struct acpi_thermal *tz)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222{
Len Brown4be44fc2005-08-05 00:44:28 -0400223 acpi_status status = AE_OK;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400224 unsigned long long tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225
226 if (!tz)
Patrick Mocheld550d982006-06-27 00:41:40 -0400227 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228
Matthew Wilcox27663c52008-10-10 02:22:59 -0400229 status = acpi_evaluate_integer(tz->device->handle, "_TZP", NULL, &tmp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 if (ACPI_FAILURE(status))
Patrick Mocheld550d982006-06-27 00:41:40 -0400231 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232
Matthew Wilcox27663c52008-10-10 02:22:59 -0400233 tz->polling_frequency = tmp;
Len Brown4be44fc2005-08-05 00:44:28 -0400234 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Polling frequency is %lu dS\n",
235 tz->polling_frequency));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236
Patrick Mocheld550d982006-06-27 00:41:40 -0400237 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238}
239
Len Brown4be44fc2005-08-05 00:44:28 -0400240static int acpi_thermal_set_cooling_mode(struct acpi_thermal *tz, int mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241{
Len Brown4be44fc2005-08-05 00:44:28 -0400242 acpi_status status = AE_OK;
243 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
244 struct acpi_object_list arg_list = { 1, &arg0 };
245 acpi_handle handle = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247
248 if (!tz)
Patrick Mocheld550d982006-06-27 00:41:40 -0400249 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250
Patrick Mochel38ba7c92006-05-19 16:54:48 -0400251 status = acpi_get_handle(tz->device->handle, "_SCP", &handle);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252 if (ACPI_FAILURE(status)) {
253 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "_SCP not present\n"));
Patrick Mocheld550d982006-06-27 00:41:40 -0400254 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 }
256
257 arg0.integer.value = mode;
258
259 status = acpi_evaluate_object(handle, NULL, &arg_list, NULL);
260 if (ACPI_FAILURE(status))
Patrick Mocheld550d982006-06-27 00:41:40 -0400261 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262
Patrick Mocheld550d982006-06-27 00:41:40 -0400263 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264}
265
Zhang Ruice44e192008-01-17 15:51:25 +0800266#define ACPI_TRIPS_CRITICAL 0x01
267#define ACPI_TRIPS_HOT 0x02
268#define ACPI_TRIPS_PASSIVE 0x04
269#define ACPI_TRIPS_ACTIVE 0x08
270#define ACPI_TRIPS_DEVICES 0x10
271
272#define ACPI_TRIPS_REFRESH_THRESHOLDS (ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE)
273#define ACPI_TRIPS_REFRESH_DEVICES ACPI_TRIPS_DEVICES
274
275#define ACPI_TRIPS_INIT (ACPI_TRIPS_CRITICAL | ACPI_TRIPS_HOT | \
276 ACPI_TRIPS_PASSIVE | ACPI_TRIPS_ACTIVE | \
277 ACPI_TRIPS_DEVICES)
278
279/*
280 * This exception is thrown out in two cases:
281 * 1.An invalid trip point becomes invalid or a valid trip point becomes invalid
282 * when re-evaluating the AML code.
283 * 2.TODO: Devices listed in _PSL, _ALx, _TZD may change.
284 * We need to re-bind the cooling devices of a thermal zone when this occurs.
285 */
286#define ACPI_THERMAL_TRIPS_EXCEPTION(flags, str) \
287do { \
288 if (flags != ACPI_TRIPS_INIT) \
289 ACPI_EXCEPTION((AE_INFO, AE_ERROR, \
290 "ACPI thermal trip point %s changed\n" \
291 "Please send acpidump to linux-acpi@vger.kernel.org\n", str)); \
292} while (0)
293
294static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295{
Len Brown4be44fc2005-08-05 00:44:28 -0400296 acpi_status status = AE_OK;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400297 unsigned long long tmp;
Zhang Ruice44e192008-01-17 15:51:25 +0800298 struct acpi_handle_list devices;
299 int valid = 0;
300 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301
Thomas Renningerfa809452010-02-20 11:44:27 +0100302 /* Critical Shutdown */
Zhang Ruice44e192008-01-17 15:51:25 +0800303 if (flag & ACPI_TRIPS_CRITICAL) {
304 status = acpi_evaluate_integer(tz->device->handle,
Matthew Wilcox27663c52008-10-10 02:22:59 -0400305 "_CRT", NULL, &tmp);
306 tz->trips.critical.temperature = tmp;
Arjan van de Vena39a2d72008-05-19 15:55:15 -0700307 /*
308 * Treat freezing temperatures as invalid as well; some
309 * BIOSes return really low values and cause reboots at startup.
Adam Buchbinderb731d7b2009-03-13 12:15:26 -0400310 * Below zero (Celsius) values clearly aren't right for sure..
Arjan van de Vena39a2d72008-05-19 15:55:15 -0700311 * ... so lets discard those as invalid.
312 */
Thomas Renningerfa809452010-02-20 11:44:27 +0100313 if (ACPI_FAILURE(status)) {
Len Brownc52a7412007-08-14 15:49:32 -0400314 tz->trips.critical.flags.valid = 0;
Thomas Renningerfa809452010-02-20 11:44:27 +0100315 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
316 "No critical threshold\n"));
317 } else if (tmp <= 2732) {
318 printk(KERN_WARNING FW_BUG "Invalid critical threshold "
319 "(%llu)\n", tmp);
320 tz->trips.critical.flags.valid = 0;
Zhang Ruice44e192008-01-17 15:51:25 +0800321 } else {
322 tz->trips.critical.flags.valid = 1;
323 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
Thomas Renningerfa809452010-02-20 11:44:27 +0100324 "Found critical threshold [%lu]\n",
325 tz->trips.critical.temperature));
Zhang Ruice44e192008-01-17 15:51:25 +0800326 }
327 if (tz->trips.critical.flags.valid == 1) {
328 if (crt == -1) {
329 tz->trips.critical.flags.valid = 0;
330 } else if (crt > 0) {
331 unsigned long crt_k = CELSIUS_TO_KELVIN(crt);
332 /*
Zhang Rui22a94d72008-10-17 02:41:20 -0400333 * Allow override critical threshold
Zhang Ruice44e192008-01-17 15:51:25 +0800334 */
Zhang Rui22a94d72008-10-17 02:41:20 -0400335 if (crt_k > tz->trips.critical.temperature)
336 printk(KERN_WARNING PREFIX
337 "Critical threshold %d C\n", crt);
338 tz->trips.critical.temperature = crt_k;
Zhang Ruice44e192008-01-17 15:51:25 +0800339 }
Len Brownc52a7412007-08-14 15:49:32 -0400340 }
341 }
342
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343 /* Critical Sleep (optional) */
Zhang Ruice44e192008-01-17 15:51:25 +0800344 if (flag & ACPI_TRIPS_HOT) {
Len Browna70cdc52007-08-12 00:12:35 -0400345 status = acpi_evaluate_integer(tz->device->handle,
Matthew Wilcox27663c52008-10-10 02:22:59 -0400346 "_HOT", NULL, &tmp);
Zhang Ruice44e192008-01-17 15:51:25 +0800347 if (ACPI_FAILURE(status)) {
348 tz->trips.hot.flags.valid = 0;
Len Brown4be44fc2005-08-05 00:44:28 -0400349 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
Zhang Ruice44e192008-01-17 15:51:25 +0800350 "No hot threshold\n"));
351 } else {
Matthew Wilcox27663c52008-10-10 02:22:59 -0400352 tz->trips.hot.temperature = tmp;
Zhang Ruice44e192008-01-17 15:51:25 +0800353 tz->trips.hot.flags.valid = 1;
354 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
355 "Found hot threshold [%lu]\n",
356 tz->trips.critical.temperature));
357 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358 }
359
Zhang Ruice44e192008-01-17 15:51:25 +0800360 /* Passive (optional) */
Zhang Rui0e4240d2009-01-16 12:53:42 -0500361 if (((flag & ACPI_TRIPS_PASSIVE) && tz->trips.passive.flags.valid) ||
362 (flag == ACPI_TRIPS_INIT)) {
Zhang Ruice44e192008-01-17 15:51:25 +0800363 valid = tz->trips.passive.flags.valid;
364 if (psv == -1) {
365 status = AE_SUPPORT;
366 } else if (psv > 0) {
Matthew Wilcox27663c52008-10-10 02:22:59 -0400367 tmp = CELSIUS_TO_KELVIN(psv);
Zhang Ruice44e192008-01-17 15:51:25 +0800368 status = AE_OK;
369 } else {
370 status = acpi_evaluate_integer(tz->device->handle,
Matthew Wilcox27663c52008-10-10 02:22:59 -0400371 "_PSV", NULL, &tmp);
Zhang Ruice44e192008-01-17 15:51:25 +0800372 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373
Zhang Ruice44e192008-01-17 15:51:25 +0800374 if (ACPI_FAILURE(status))
375 tz->trips.passive.flags.valid = 0;
376 else {
Matthew Wilcox27663c52008-10-10 02:22:59 -0400377 tz->trips.passive.temperature = tmp;
Zhang Ruice44e192008-01-17 15:51:25 +0800378 tz->trips.passive.flags.valid = 1;
379 if (flag == ACPI_TRIPS_INIT) {
380 status = acpi_evaluate_integer(
381 tz->device->handle, "_TC1",
Matthew Wilcox27663c52008-10-10 02:22:59 -0400382 NULL, &tmp);
Zhang Ruice44e192008-01-17 15:51:25 +0800383 if (ACPI_FAILURE(status))
384 tz->trips.passive.flags.valid = 0;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400385 else
386 tz->trips.passive.tc1 = tmp;
Zhang Ruice44e192008-01-17 15:51:25 +0800387 status = acpi_evaluate_integer(
388 tz->device->handle, "_TC2",
Matthew Wilcox27663c52008-10-10 02:22:59 -0400389 NULL, &tmp);
Zhang Ruice44e192008-01-17 15:51:25 +0800390 if (ACPI_FAILURE(status))
391 tz->trips.passive.flags.valid = 0;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400392 else
393 tz->trips.passive.tc2 = tmp;
Zhang Ruice44e192008-01-17 15:51:25 +0800394 status = acpi_evaluate_integer(
395 tz->device->handle, "_TSP",
Matthew Wilcox27663c52008-10-10 02:22:59 -0400396 NULL, &tmp);
Zhang Ruice44e192008-01-17 15:51:25 +0800397 if (ACPI_FAILURE(status))
398 tz->trips.passive.flags.valid = 0;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400399 else
400 tz->trips.passive.tsp = tmp;
Zhang Ruice44e192008-01-17 15:51:25 +0800401 }
402 }
403 }
404 if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.flags.valid) {
405 memset(&devices, 0, sizeof(struct acpi_handle_list));
406 status = acpi_evaluate_reference(tz->device->handle, "_PSL",
407 NULL, &devices);
Zhang Rui0e4240d2009-01-16 12:53:42 -0500408 if (ACPI_FAILURE(status)) {
409 printk(KERN_WARNING PREFIX
410 "Invalid passive threshold\n");
Zhang Ruice44e192008-01-17 15:51:25 +0800411 tz->trips.passive.flags.valid = 0;
Zhang Rui0e4240d2009-01-16 12:53:42 -0500412 }
Zhang Ruice44e192008-01-17 15:51:25 +0800413 else
414 tz->trips.passive.flags.valid = 1;
415
416 if (memcmp(&tz->trips.passive.devices, &devices,
417 sizeof(struct acpi_handle_list))) {
418 memcpy(&tz->trips.passive.devices, &devices,
419 sizeof(struct acpi_handle_list));
420 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
421 }
422 }
423 if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) {
424 if (valid != tz->trips.passive.flags.valid)
425 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state");
426 }
427
428 /* Active (optional) */
Len Brown4be44fc2005-08-05 00:44:28 -0400429 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
Len Brown4be44fc2005-08-05 00:44:28 -0400430 char name[5] = { '_', 'A', 'C', ('0' + i), '\0' };
Zhang Ruice44e192008-01-17 15:51:25 +0800431 valid = tz->trips.active[i].flags.valid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432
Len Brownf8707ec2007-08-12 00:12:54 -0400433 if (act == -1)
Zhang Ruice44e192008-01-17 15:51:25 +0800434 break; /* disable all active trip points */
Len Brownf8707ec2007-08-12 00:12:54 -0400435
Zhang Rui0e4240d2009-01-16 12:53:42 -0500436 if ((flag == ACPI_TRIPS_INIT) || ((flag & ACPI_TRIPS_ACTIVE) &&
437 tz->trips.active[i].flags.valid)) {
Zhang Ruice44e192008-01-17 15:51:25 +0800438 status = acpi_evaluate_integer(tz->device->handle,
Matthew Wilcox27663c52008-10-10 02:22:59 -0400439 name, NULL, &tmp);
Zhang Ruice44e192008-01-17 15:51:25 +0800440 if (ACPI_FAILURE(status)) {
441 tz->trips.active[i].flags.valid = 0;
442 if (i == 0)
443 break;
444 if (act <= 0)
445 break;
446 if (i == 1)
447 tz->trips.active[0].temperature =
448 CELSIUS_TO_KELVIN(act);
449 else
450 /*
451 * Don't allow override higher than
452 * the next higher trip point
453 */
454 tz->trips.active[i - 1].temperature =
455 (tz->trips.active[i - 2].temperature <
456 CELSIUS_TO_KELVIN(act) ?
457 tz->trips.active[i - 2].temperature :
458 CELSIUS_TO_KELVIN(act));
Len Brownf8707ec2007-08-12 00:12:54 -0400459 break;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400460 } else {
461 tz->trips.active[i].temperature = tmp;
Zhang Ruice44e192008-01-17 15:51:25 +0800462 tz->trips.active[i].flags.valid = 1;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400463 }
Len Brownf8707ec2007-08-12 00:12:54 -0400464 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465
466 name[2] = 'L';
Zhang Ruice44e192008-01-17 15:51:25 +0800467 if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.active[i].flags.valid ) {
468 memset(&devices, 0, sizeof(struct acpi_handle_list));
469 status = acpi_evaluate_reference(tz->device->handle,
470 name, NULL, &devices);
Zhang Rui0e4240d2009-01-16 12:53:42 -0500471 if (ACPI_FAILURE(status)) {
472 printk(KERN_WARNING PREFIX
473 "Invalid active%d threshold\n", i);
Zhang Ruice44e192008-01-17 15:51:25 +0800474 tz->trips.active[i].flags.valid = 0;
Zhang Rui0e4240d2009-01-16 12:53:42 -0500475 }
Zhang Ruice44e192008-01-17 15:51:25 +0800476 else
477 tz->trips.active[i].flags.valid = 1;
478
479 if (memcmp(&tz->trips.active[i].devices, &devices,
480 sizeof(struct acpi_handle_list))) {
481 memcpy(&tz->trips.active[i].devices, &devices,
482 sizeof(struct acpi_handle_list));
483 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
484 }
485 }
486 if ((flag & ACPI_TRIPS_ACTIVE) || (flag & ACPI_TRIPS_DEVICES))
487 if (valid != tz->trips.active[i].flags.valid)
488 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "state");
489
490 if (!tz->trips.active[i].flags.valid)
491 break;
492 }
493
494 if (flag & ACPI_TRIPS_DEVICES) {
495 memset(&devices, 0, sizeof(struct acpi_handle_list));
496 status = acpi_evaluate_reference(tz->device->handle, "_TZD",
497 NULL, &devices);
498 if (memcmp(&tz->devices, &devices,
499 sizeof(struct acpi_handle_list))) {
500 memcpy(&tz->devices, &devices,
501 sizeof(struct acpi_handle_list));
502 ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
503 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504 }
505
Patrick Mocheld550d982006-06-27 00:41:40 -0400506 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507}
508
Zhang Ruice44e192008-01-17 15:51:25 +0800509static int acpi_thermal_get_trip_points(struct acpi_thermal *tz)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510{
Thomas Renninger8b7ef6d2010-02-16 22:55:51 +0100511 int i, valid, ret = acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT);
512
513 if (ret)
514 return ret;
515
516 valid = tz->trips.critical.flags.valid |
517 tz->trips.hot.flags.valid |
518 tz->trips.passive.flags.valid;
519
520 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++)
521 valid |= tz->trips.active[i].flags.valid;
522
523 if (!valid) {
524 printk(KERN_WARNING FW_BUG "No valid trip found\n");
525 return -ENODEV;
526 }
527 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528}
529
Len Brown4be44fc2005-08-05 00:44:28 -0400530static void acpi_thermal_check(void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531{
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200532 struct acpi_thermal *tz = data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533
Matthew Garrettb1569e92008-12-03 17:55:32 +0000534 thermal_zone_device_update(tz->thermal_zone);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535}
536
Zhang Rui3f655ef2008-01-17 15:51:11 +0800537/* sys I/F for generic thermal sysfs support */
Jean Delvare13614e32009-04-06 16:01:46 +0200538#define KELVIN_TO_MILLICELSIUS(t, off) (((t) - (off)) * 100)
Zhang, Rui5e012762008-02-28 07:51:30 +0800539
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000540static int thermal_get_temp(struct thermal_zone_device *thermal,
541 unsigned long *temp)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800542{
543 struct acpi_thermal *tz = thermal->devdata;
Zhang, Rui76ecb4f2008-04-10 16:20:23 +0800544 int result;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800545
546 if (!tz)
547 return -EINVAL;
548
Zhang, Rui76ecb4f2008-04-10 16:20:23 +0800549 result = acpi_thermal_get_temperature(tz);
550 if (result)
551 return result;
552
Jean Delvare13614e32009-04-06 16:01:46 +0200553 *temp = KELVIN_TO_MILLICELSIUS(tz->temperature, tz->kelvin_offset);
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000554 return 0;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800555}
556
Zhang Rui3f655ef2008-01-17 15:51:11 +0800557static int thermal_get_mode(struct thermal_zone_device *thermal,
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000558 enum thermal_device_mode *mode)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800559{
560 struct acpi_thermal *tz = thermal->devdata;
561
562 if (!tz)
563 return -EINVAL;
564
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000565 *mode = tz->tz_enabled ? THERMAL_DEVICE_ENABLED :
566 THERMAL_DEVICE_DISABLED;
567
568 return 0;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800569}
570
571static int thermal_set_mode(struct thermal_zone_device *thermal,
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000572 enum thermal_device_mode mode)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800573{
574 struct acpi_thermal *tz = thermal->devdata;
575 int enable;
576
577 if (!tz)
578 return -EINVAL;
579
580 /*
581 * enable/disable thermal management from ACPI thermal driver
582 */
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000583 if (mode == THERMAL_DEVICE_ENABLED)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800584 enable = 1;
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000585 else if (mode == THERMAL_DEVICE_DISABLED)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800586 enable = 0;
587 else
588 return -EINVAL;
589
590 if (enable != tz->tz_enabled) {
591 tz->tz_enabled = enable;
592 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
Zhang Rui8eaa8d62012-07-25 10:11:00 +0800593 "%s kernel ACPI thermal control\n",
594 tz->tz_enabled ? "Enable" : "Disable"));
Zhang Rui3f655ef2008-01-17 15:51:11 +0800595 acpi_thermal_check(tz);
596 }
597 return 0;
598}
599
600static int thermal_get_trip_type(struct thermal_zone_device *thermal,
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000601 int trip, enum thermal_trip_type *type)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800602{
603 struct acpi_thermal *tz = thermal->devdata;
604 int i;
605
606 if (!tz || trip < 0)
607 return -EINVAL;
608
609 if (tz->trips.critical.flags.valid) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000610 if (!trip) {
611 *type = THERMAL_TRIP_CRITICAL;
612 return 0;
613 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800614 trip--;
615 }
616
617 if (tz->trips.hot.flags.valid) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000618 if (!trip) {
619 *type = THERMAL_TRIP_HOT;
620 return 0;
621 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800622 trip--;
623 }
624
625 if (tz->trips.passive.flags.valid) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000626 if (!trip) {
627 *type = THERMAL_TRIP_PASSIVE;
628 return 0;
629 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800630 trip--;
631 }
632
633 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
634 tz->trips.active[i].flags.valid; i++) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000635 if (!trip) {
636 *type = THERMAL_TRIP_ACTIVE;
637 return 0;
638 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800639 trip--;
640 }
641
642 return -EINVAL;
643}
644
645static int thermal_get_trip_temp(struct thermal_zone_device *thermal,
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000646 int trip, unsigned long *temp)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800647{
648 struct acpi_thermal *tz = thermal->devdata;
649 int i;
650
651 if (!tz || trip < 0)
652 return -EINVAL;
653
654 if (tz->trips.critical.flags.valid) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000655 if (!trip) {
656 *temp = KELVIN_TO_MILLICELSIUS(
Jean Delvare13614e32009-04-06 16:01:46 +0200657 tz->trips.critical.temperature,
658 tz->kelvin_offset);
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000659 return 0;
660 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800661 trip--;
662 }
663
664 if (tz->trips.hot.flags.valid) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000665 if (!trip) {
666 *temp = KELVIN_TO_MILLICELSIUS(
Jean Delvare13614e32009-04-06 16:01:46 +0200667 tz->trips.hot.temperature,
668 tz->kelvin_offset);
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000669 return 0;
670 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800671 trip--;
672 }
673
674 if (tz->trips.passive.flags.valid) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000675 if (!trip) {
676 *temp = KELVIN_TO_MILLICELSIUS(
Jean Delvare13614e32009-04-06 16:01:46 +0200677 tz->trips.passive.temperature,
678 tz->kelvin_offset);
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000679 return 0;
680 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800681 trip--;
682 }
683
684 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
685 tz->trips.active[i].flags.valid; i++) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000686 if (!trip) {
687 *temp = KELVIN_TO_MILLICELSIUS(
Jean Delvare13614e32009-04-06 16:01:46 +0200688 tz->trips.active[i].temperature,
689 tz->kelvin_offset);
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000690 return 0;
691 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800692 trip--;
693 }
694
695 return -EINVAL;
696}
697
Zhang, Rui9ec732f2008-04-10 16:13:10 +0800698static int thermal_get_crit_temp(struct thermal_zone_device *thermal,
699 unsigned long *temperature) {
700 struct acpi_thermal *tz = thermal->devdata;
701
702 if (tz->trips.critical.flags.valid) {
703 *temperature = KELVIN_TO_MILLICELSIUS(
Jean Delvare13614e32009-04-06 16:01:46 +0200704 tz->trips.critical.temperature,
705 tz->kelvin_offset);
Zhang, Rui9ec732f2008-04-10 16:13:10 +0800706 return 0;
707 } else
708 return -EINVAL;
709}
710
Zhang Rui601f3d42012-06-27 09:54:33 +0800711static int thermal_get_trend(struct thermal_zone_device *thermal,
712 int trip, enum thermal_trend *trend)
713{
714 struct acpi_thermal *tz = thermal->devdata;
715 enum thermal_trip_type type;
716 int i;
717
718 if (thermal_get_trip_type(thermal, trip, &type))
719 return -EINVAL;
720
Zhang Rui4ae46be2012-06-27 10:05:39 +0800721 if (type == THERMAL_TRIP_ACTIVE) {
722 /* aggressive active cooling */
723 *trend = THERMAL_TREND_RAISING;
724 return 0;
725 }
Zhang Rui601f3d42012-06-27 09:54:33 +0800726
727 /*
728 * tz->temperature has already been updated by generic thermal layer,
729 * before this callback being invoked
730 */
731 i = (tz->trips.passive.tc1 * (tz->temperature - tz->last_temperature))
732 + (tz->trips.passive.tc2
733 * (tz->temperature - tz->trips.passive.temperature));
734
735 if (i > 0)
736 *trend = THERMAL_TREND_RAISING;
737 else if (i < 0)
738 *trend = THERMAL_TREND_DROPPING;
739 else
740 *trend = THERMAL_TREND_STABLE;
741 return 0;
742}
743
744
Matthew Garrettb1569e92008-12-03 17:55:32 +0000745static int thermal_notify(struct thermal_zone_device *thermal, int trip,
746 enum thermal_trip_type trip_type)
747{
748 u8 type = 0;
749 struct acpi_thermal *tz = thermal->devdata;
750
751 if (trip_type == THERMAL_TRIP_CRITICAL)
752 type = ACPI_THERMAL_NOTIFY_CRITICAL;
753 else if (trip_type == THERMAL_TRIP_HOT)
754 type = ACPI_THERMAL_NOTIFY_HOT;
755 else
756 return 0;
757
758 acpi_bus_generate_proc_event(tz->device, type, 1);
759 acpi_bus_generate_netlink_event(tz->device->pnp.device_class,
Stephen Rothwellf6f5c452009-03-03 12:47:17 +1100760 dev_name(&tz->device->dev), type, 1);
Matthew Garrettb1569e92008-12-03 17:55:32 +0000761
762 if (trip_type == THERMAL_TRIP_CRITICAL && nocrt)
763 return 1;
764
765 return 0;
766}
767
Zhang Rui3f655ef2008-01-17 15:51:11 +0800768static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal,
769 struct thermal_cooling_device *cdev,
Zhang Rui9d998422012-06-26 16:35:57 +0800770 bool bind)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800771{
772 struct acpi_device *device = cdev->devdata;
773 struct acpi_thermal *tz = thermal->devdata;
Zhang Rui653a00c2008-01-17 15:51:18 +0800774 struct acpi_device *dev;
775 acpi_status status;
776 acpi_handle handle;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800777 int i;
778 int j;
779 int trip = -1;
780 int result = 0;
781
782 if (tz->trips.critical.flags.valid)
783 trip++;
784
785 if (tz->trips.hot.flags.valid)
786 trip++;
787
788 if (tz->trips.passive.flags.valid) {
789 trip++;
790 for (i = 0; i < tz->trips.passive.devices.count;
791 i++) {
Zhang Rui653a00c2008-01-17 15:51:18 +0800792 handle = tz->trips.passive.devices.handles[i];
793 status = acpi_bus_get_device(handle, &dev);
Zhang Rui9d998422012-06-26 16:35:57 +0800794 if (ACPI_FAILURE(status) || dev != device)
795 continue;
796 if (bind)
797 result =
798 thermal_zone_bind_cooling_device
799 (thermal, trip, cdev,
800 THERMAL_NO_LIMIT, THERMAL_NO_LIMIT);
801 else
802 result =
803 thermal_zone_unbind_cooling_device
804 (thermal, trip, cdev);
805 if (result)
806 goto failed;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800807 }
808 }
809
810 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
811 if (!tz->trips.active[i].flags.valid)
812 break;
813 trip++;
814 for (j = 0;
815 j < tz->trips.active[i].devices.count;
816 j++) {
Zhang Rui653a00c2008-01-17 15:51:18 +0800817 handle = tz->trips.active[i].devices.handles[j];
818 status = acpi_bus_get_device(handle, &dev);
Zhang Rui9d998422012-06-26 16:35:57 +0800819 if (ACPI_FAILURE(status) || dev != device)
820 continue;
821 if (bind)
822 result = thermal_zone_bind_cooling_device
823 (thermal, trip, cdev,
824 THERMAL_NO_LIMIT, THERMAL_NO_LIMIT);
825 else
826 result = thermal_zone_unbind_cooling_device
827 (thermal, trip, cdev);
828 if (result)
829 goto failed;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800830 }
831 }
832
833 for (i = 0; i < tz->devices.count; i++) {
Zhang Rui653a00c2008-01-17 15:51:18 +0800834 handle = tz->devices.handles[i];
835 status = acpi_bus_get_device(handle, &dev);
836 if (ACPI_SUCCESS(status) && (dev == device)) {
Zhang Rui9d998422012-06-26 16:35:57 +0800837 if (bind)
838 result = thermal_zone_bind_cooling_device
839 (thermal, -1, cdev,
840 THERMAL_NO_LIMIT,
841 THERMAL_NO_LIMIT);
842 else
843 result = thermal_zone_unbind_cooling_device
844 (thermal, -1, cdev);
Zhang Rui653a00c2008-01-17 15:51:18 +0800845 if (result)
846 goto failed;
847 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800848 }
849
850failed:
851 return result;
852}
853
854static int
855acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal,
856 struct thermal_cooling_device *cdev)
857{
Zhang Rui9d998422012-06-26 16:35:57 +0800858 return acpi_thermal_cooling_device_cb(thermal, cdev, true);
Zhang Rui3f655ef2008-01-17 15:51:11 +0800859}
860
861static int
862acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal,
863 struct thermal_cooling_device *cdev)
864{
Zhang Rui9d998422012-06-26 16:35:57 +0800865 return acpi_thermal_cooling_device_cb(thermal, cdev, false);
Zhang Rui3f655ef2008-01-17 15:51:11 +0800866}
867
Vasiliy Kulikov9c8b04b2011-06-25 21:07:52 +0400868static const struct thermal_zone_device_ops acpi_thermal_zone_ops = {
Zhang Rui3f655ef2008-01-17 15:51:11 +0800869 .bind = acpi_thermal_bind_cooling_device,
870 .unbind = acpi_thermal_unbind_cooling_device,
871 .get_temp = thermal_get_temp,
872 .get_mode = thermal_get_mode,
873 .set_mode = thermal_set_mode,
874 .get_trip_type = thermal_get_trip_type,
875 .get_trip_temp = thermal_get_trip_temp,
Zhang, Rui9ec732f2008-04-10 16:13:10 +0800876 .get_crit_temp = thermal_get_crit_temp,
Zhang Rui601f3d42012-06-27 09:54:33 +0800877 .get_trend = thermal_get_trend,
Matthew Garrettb1569e92008-12-03 17:55:32 +0000878 .notify = thermal_notify,
Zhang Rui3f655ef2008-01-17 15:51:11 +0800879};
880
881static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
882{
883 int trips = 0;
884 int result;
Zhang Rui20733932008-01-17 15:51:21 +0800885 acpi_status status;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800886 int i;
887
888 if (tz->trips.critical.flags.valid)
889 trips++;
890
891 if (tz->trips.hot.flags.valid)
892 trips++;
893
894 if (tz->trips.passive.flags.valid)
895 trips++;
896
897 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
898 tz->trips.active[i].flags.valid; i++, trips++);
Matthew Garrettb1569e92008-12-03 17:55:32 +0000899
900 if (tz->trips.passive.flags.valid)
901 tz->thermal_zone =
Durgadoss Rc56f5c02012-07-25 10:10:58 +0800902 thermal_zone_device_register("acpitz", trips, 0, tz,
Matthew Garrettb1569e92008-12-03 17:55:32 +0000903 &acpi_thermal_zone_ops,
Matthew Garrettb1569e92008-12-03 17:55:32 +0000904 tz->trips.passive.tsp*100,
905 tz->polling_frequency*100);
906 else
907 tz->thermal_zone =
Durgadoss Rc56f5c02012-07-25 10:10:58 +0800908 thermal_zone_device_register("acpitz", trips, 0, tz,
Zhang Rui1b7ddb82012-06-27 09:51:12 +0800909 &acpi_thermal_zone_ops, 0,
Matthew Garrett67405432009-04-14 20:16:45 +0100910 tz->polling_frequency*100);
Krzysztof Heltbb070e42008-04-08 17:41:52 -0700911 if (IS_ERR(tz->thermal_zone))
Zhang Rui3f655ef2008-01-17 15:51:11 +0800912 return -ENODEV;
913
914 result = sysfs_create_link(&tz->device->dev.kobj,
915 &tz->thermal_zone->device.kobj, "thermal_zone");
916 if (result)
917 return result;
918
919 result = sysfs_create_link(&tz->thermal_zone->device.kobj,
920 &tz->device->dev.kobj, "device");
921 if (result)
922 return result;
923
Zhang Rui20733932008-01-17 15:51:21 +0800924 status = acpi_attach_data(tz->device->handle,
925 acpi_bus_private_data_handler,
926 tz->thermal_zone);
927 if (ACPI_FAILURE(status)) {
Lin Ming55ac9a02008-09-28 14:51:56 +0800928 printk(KERN_ERR PREFIX
929 "Error attaching device data\n");
Zhang Rui20733932008-01-17 15:51:21 +0800930 return -ENODEV;
931 }
932
Zhang Rui3f655ef2008-01-17 15:51:11 +0800933 tz->tz_enabled = 1;
934
Greg Kroah-Hartmanfc3a8822008-05-02 06:02:41 +0200935 dev_info(&tz->device->dev, "registered as thermal_zone%d\n",
936 tz->thermal_zone->id);
Zhang Rui3f655ef2008-01-17 15:51:11 +0800937 return 0;
938}
939
940static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz)
941{
942 sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone");
943 sysfs_remove_link(&tz->thermal_zone->device.kobj, "device");
944 thermal_zone_device_unregister(tz->thermal_zone);
945 tz->thermal_zone = NULL;
Zhang Rui20733932008-01-17 15:51:21 +0800946 acpi_detach_data(tz->device->handle, acpi_bus_private_data_handler);
Zhang Rui3f655ef2008-01-17 15:51:11 +0800947}
948
949
Linus Torvalds1da177e2005-04-16 15:20:36 -0700950/* --------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951 Driver Interface
952 -------------------------------------------------------------------------- */
953
Bjorn Helgaas342d5502009-04-07 15:37:06 +0000954static void acpi_thermal_notify(struct acpi_device *device, u32 event)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955{
Bjorn Helgaas342d5502009-04-07 15:37:06 +0000956 struct acpi_thermal *tz = acpi_driver_data(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958
959 if (!tz)
Patrick Mocheld550d982006-06-27 00:41:40 -0400960 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700961
Linus Torvalds1da177e2005-04-16 15:20:36 -0700962 switch (event) {
963 case ACPI_THERMAL_NOTIFY_TEMPERATURE:
964 acpi_thermal_check(tz);
965 break;
966 case ACPI_THERMAL_NOTIFY_THRESHOLDS:
Zhang Ruice44e192008-01-17 15:51:25 +0800967 acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968 acpi_thermal_check(tz);
Len Brown14e04fb2007-08-23 15:20:26 -0400969 acpi_bus_generate_proc_event(device, event, 0);
Zhang Rui962ce8c2007-08-23 01:24:31 +0800970 acpi_bus_generate_netlink_event(device->pnp.device_class,
Kay Sievers07944692008-10-30 01:18:59 +0100971 dev_name(&device->dev), event, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700972 break;
973 case ACPI_THERMAL_NOTIFY_DEVICES:
Zhang Ruice44e192008-01-17 15:51:25 +0800974 acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES);
975 acpi_thermal_check(tz);
Len Brown14e04fb2007-08-23 15:20:26 -0400976 acpi_bus_generate_proc_event(device, event, 0);
Zhang Rui962ce8c2007-08-23 01:24:31 +0800977 acpi_bus_generate_netlink_event(device->pnp.device_class,
Kay Sievers07944692008-10-30 01:18:59 +0100978 dev_name(&device->dev), event, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979 break;
980 default:
981 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
Len Brown4be44fc2005-08-05 00:44:28 -0400982 "Unsupported event [0x%x]\n", event));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700983 break;
984 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985}
986
Len Brown4be44fc2005-08-05 00:44:28 -0400987static int acpi_thermal_get_info(struct acpi_thermal *tz)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700988{
Len Brown4be44fc2005-08-05 00:44:28 -0400989 int result = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700990
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991
992 if (!tz)
Patrick Mocheld550d982006-06-27 00:41:40 -0400993 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994
Matthew Garrett9bcb8112012-02-01 10:26:54 -0500995 /* Get trip points [_CRT, _PSV, etc.] (required) */
996 result = acpi_thermal_get_trip_points(tz);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700997 if (result)
Patrick Mocheld550d982006-06-27 00:41:40 -0400998 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999
Matthew Garrett9bcb8112012-02-01 10:26:54 -05001000 /* Get temperature [_TMP] (required) */
1001 result = acpi_thermal_get_temperature(tz);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001002 if (result)
Patrick Mocheld550d982006-06-27 00:41:40 -04001003 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001004
1005 /* Set the cooling mode [_SCP] to active cooling (default) */
1006 result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE);
Len Brown4be44fc2005-08-05 00:44:28 -04001007 if (!result)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008 tz->flags.cooling_mode = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001009
1010 /* Get default polling frequency [_TZP] (optional) */
1011 if (tzp)
1012 tz->polling_frequency = tzp;
1013 else
1014 acpi_thermal_get_polling_frequency(tz);
1015
Patrick Mocheld550d982006-06-27 00:41:40 -04001016 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017}
1018
Jean Delvare13614e32009-04-06 16:01:46 +02001019/*
1020 * The exact offset between Kelvin and degree Celsius is 273.15. However ACPI
1021 * handles temperature values with a single decimal place. As a consequence,
1022 * some implementations use an offset of 273.1 and others use an offset of
1023 * 273.2. Try to find out which one is being used, to present the most
1024 * accurate and visually appealing number.
1025 *
1026 * The heuristic below should work for all ACPI thermal zones which have a
1027 * critical trip point with a value being a multiple of 0.5 degree Celsius.
1028 */
1029static void acpi_thermal_guess_offset(struct acpi_thermal *tz)
1030{
1031 if (tz->trips.critical.flags.valid &&
1032 (tz->trips.critical.temperature % 5) == 1)
1033 tz->kelvin_offset = 2731;
1034 else
1035 tz->kelvin_offset = 2732;
1036}
1037
Len Brown4be44fc2005-08-05 00:44:28 -04001038static int acpi_thermal_add(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001039{
Len Brown4be44fc2005-08-05 00:44:28 -04001040 int result = 0;
Len Brown4be44fc2005-08-05 00:44:28 -04001041 struct acpi_thermal *tz = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001042
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043
1044 if (!device)
Patrick Mocheld550d982006-06-27 00:41:40 -04001045 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001046
Burman Yan36bcbec2006-12-19 12:56:11 -08001047 tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001048 if (!tz)
Patrick Mocheld550d982006-06-27 00:41:40 -04001049 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001050
Patrick Mochel8348e1b2006-05-19 16:54:40 -04001051 tz->device = device;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052 strcpy(tz->name, device->pnp.bus_id);
1053 strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME);
1054 strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS);
Pavel Machekdb89b4f2008-09-22 14:37:34 -07001055 device->driver_data = tz;
Alexey Starikovskiy6e215782007-09-01 00:11:59 +04001056 mutex_init(&tz->lock);
Zhang Rui3f655ef2008-01-17 15:51:11 +08001057
1058
Linus Torvalds1da177e2005-04-16 15:20:36 -07001059 result = acpi_thermal_get_info(tz);
1060 if (result)
Zhang Rui3f655ef2008-01-17 15:51:11 +08001061 goto free_memory;
1062
Jean Delvare13614e32009-04-06 16:01:46 +02001063 acpi_thermal_guess_offset(tz);
1064
Zhang Rui3f655ef2008-01-17 15:51:11 +08001065 result = acpi_thermal_register_thermal_zone(tz);
1066 if (result)
1067 goto free_memory;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001068
Linus Torvalds1da177e2005-04-16 15:20:36 -07001069 printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n",
Len Brown4be44fc2005-08-05 00:44:28 -04001070 acpi_device_name(device), acpi_device_bid(device),
1071 KELVIN_TO_CELSIUS(tz->temperature));
Zhang Rui3f655ef2008-01-17 15:51:11 +08001072 goto end;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001073
Zhang Rui3f655ef2008-01-17 15:51:11 +08001074free_memory:
1075 kfree(tz);
1076end:
Patrick Mocheld550d982006-06-27 00:41:40 -04001077 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001078}
1079
Len Brown4be44fc2005-08-05 00:44:28 -04001080static int acpi_thermal_remove(struct acpi_device *device, int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001081{
Len Brown4be44fc2005-08-05 00:44:28 -04001082 struct acpi_thermal *tz = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083
Linus Torvalds1da177e2005-04-16 15:20:36 -07001084 if (!device || !acpi_driver_data(device))
Patrick Mocheld550d982006-06-27 00:41:40 -04001085 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086
Jan Engelhardt50dd0962006-10-01 00:28:50 +02001087 tz = acpi_driver_data(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088
Zhang Rui3f655ef2008-01-17 15:51:11 +08001089 acpi_thermal_unregister_thermal_zone(tz);
Alexey Starikovskiy6e215782007-09-01 00:11:59 +04001090 mutex_destroy(&tz->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091 kfree(tz);
Patrick Mocheld550d982006-06-27 00:41:40 -04001092 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001093}
1094
Rafael J. Wysocki90692402012-08-09 23:00:02 +02001095#ifdef CONFIG_PM_SLEEP
Rafael J. Wysocki167cffb2012-06-27 23:26:18 +02001096static int acpi_thermal_resume(struct device *dev)
Konstantin Karasyov74ce14682006-05-08 08:32:00 -04001097{
Rafael J. Wysocki167cffb2012-06-27 23:26:18 +02001098 struct acpi_thermal *tz;
Konstantin Karasyovb1028c52007-02-16 02:23:07 -05001099 int i, j, power_state, result;
1100
Rafael J. Wysocki167cffb2012-06-27 23:26:18 +02001101 if (!dev)
Patrick Mocheld550d982006-06-27 00:41:40 -04001102 return -EINVAL;
Konstantin Karasyov74ce14682006-05-08 08:32:00 -04001103
Rafael J. Wysocki167cffb2012-06-27 23:26:18 +02001104 tz = acpi_driver_data(to_acpi_device(dev));
1105 if (!tz)
1106 return -EINVAL;
Konstantin Karasyov74ce14682006-05-08 08:32:00 -04001107
Konstantin Karasyovbed936f2006-07-10 04:44:26 -07001108 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
Konstantin Karasyovb1028c52007-02-16 02:23:07 -05001109 if (!(&tz->trips.active[i]))
1110 break;
1111 if (!tz->trips.active[i].flags.valid)
1112 break;
1113 tz->trips.active[i].flags.enabled = 1;
1114 for (j = 0; j < tz->trips.active[i].devices.count; j++) {
Rafael J. Wysocki488a76c2010-11-25 00:11:24 +01001115 result = acpi_bus_update_power(
1116 tz->trips.active[i].devices.handles[j],
1117 &power_state);
Konstantin Karasyovb1028c52007-02-16 02:23:07 -05001118 if (result || (power_state != ACPI_STATE_D0)) {
1119 tz->trips.active[i].flags.enabled = 0;
1120 break;
1121 }
Konstantin Karasyovbed936f2006-07-10 04:44:26 -07001122 }
Konstantin Karasyovb1028c52007-02-16 02:23:07 -05001123 tz->state.active |= tz->trips.active[i].flags.enabled;
Konstantin Karasyovbed936f2006-07-10 04:44:26 -07001124 }
1125
Konstantin Karasyovb1028c52007-02-16 02:23:07 -05001126 acpi_thermal_check(tz);
Konstantin Karasyov74ce14682006-05-08 08:32:00 -04001127
1128 return AE_OK;
1129}
Rafael J. Wysocki90692402012-08-09 23:00:02 +02001130#endif
Konstantin Karasyov74ce14682006-05-08 08:32:00 -04001131
Jeff Garzik18552562007-10-03 15:15:40 -04001132static int thermal_act(const struct dmi_system_id *d) {
Len Brown0b5bfa12007-08-12 00:13:02 -04001133
1134 if (act == 0) {
1135 printk(KERN_NOTICE "ACPI: %s detected: "
1136 "disabling all active thermal trip points\n", d->ident);
1137 act = -1;
1138 }
1139 return 0;
1140}
Jeff Garzik18552562007-10-03 15:15:40 -04001141static int thermal_nocrt(const struct dmi_system_id *d) {
Len Brown8c99fdc2007-08-20 18:46:50 -04001142
1143 printk(KERN_NOTICE "ACPI: %s detected: "
1144 "disabling all critical thermal trip point actions.\n", d->ident);
1145 nocrt = 1;
1146 return 0;
1147}
Jeff Garzik18552562007-10-03 15:15:40 -04001148static int thermal_tzp(const struct dmi_system_id *d) {
Len Brown0b5bfa12007-08-12 00:13:02 -04001149
1150 if (tzp == 0) {
1151 printk(KERN_NOTICE "ACPI: %s detected: "
1152 "enabling thermal zone polling\n", d->ident);
1153 tzp = 300; /* 300 dS = 30 Seconds */
1154 }
1155 return 0;
1156}
Jeff Garzik18552562007-10-03 15:15:40 -04001157static int thermal_psv(const struct dmi_system_id *d) {
Len Brown0b5bfa12007-08-12 00:13:02 -04001158
1159 if (psv == 0) {
1160 printk(KERN_NOTICE "ACPI: %s detected: "
1161 "disabling all passive thermal trip points\n", d->ident);
1162 psv = -1;
1163 }
1164 return 0;
1165}
1166
1167static struct dmi_system_id thermal_dmi_table[] __initdata = {
1168 /*
1169 * Award BIOS on this AOpen makes thermal control almost worthless.
1170 * http://bugzilla.kernel.org/show_bug.cgi?id=8842
1171 */
1172 {
1173 .callback = thermal_act,
1174 .ident = "AOpen i915GMm-HFS",
1175 .matches = {
1176 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1177 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1178 },
1179 },
1180 {
1181 .callback = thermal_psv,
1182 .ident = "AOpen i915GMm-HFS",
1183 .matches = {
1184 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1185 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1186 },
1187 },
1188 {
1189 .callback = thermal_tzp,
1190 .ident = "AOpen i915GMm-HFS",
1191 .matches = {
1192 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1193 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1194 },
1195 },
Len Brown8c99fdc2007-08-20 18:46:50 -04001196 {
1197 .callback = thermal_nocrt,
1198 .ident = "Gigabyte GA-7ZX",
1199 .matches = {
1200 DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."),
1201 DMI_MATCH(DMI_BOARD_NAME, "7ZX"),
1202 },
1203 },
Len Brown0b5bfa12007-08-12 00:13:02 -04001204 {}
1205};
Len Brown0b5bfa12007-08-12 00:13:02 -04001206
Len Brown4be44fc2005-08-05 00:44:28 -04001207static int __init acpi_thermal_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001208{
Len Brown4be44fc2005-08-05 00:44:28 -04001209 int result = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210
Len Brown0b5bfa12007-08-12 00:13:02 -04001211 dmi_check_system(thermal_dmi_table);
1212
Len Brown72b33ef2007-08-12 00:12:17 -04001213 if (off) {
1214 printk(KERN_NOTICE "ACPI: thermal control disabled\n");
1215 return -ENODEV;
1216 }
Zhang Rui43d9f872010-07-15 10:46:44 +08001217
Linus Torvalds1da177e2005-04-16 15:20:36 -07001218 result = acpi_bus_register_driver(&acpi_thermal_driver);
Zhang Ruic57b62f2010-10-08 13:55:06 +08001219 if (result < 0)
Patrick Mocheld550d982006-06-27 00:41:40 -04001220 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001221
Patrick Mocheld550d982006-06-27 00:41:40 -04001222 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001223}
1224
Len Brown4be44fc2005-08-05 00:44:28 -04001225static void __exit acpi_thermal_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001226{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001227
1228 acpi_bus_unregister_driver(&acpi_thermal_driver);
1229
Patrick Mocheld550d982006-06-27 00:41:40 -04001230 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001231}
1232
Linus Torvalds1da177e2005-04-16 15:20:36 -07001233module_init(acpi_thermal_init);
1234module_exit(acpi_thermal_exit);