blob: a33821ca3895e672a32d1d145aca7108751667e5 [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);
Rafael J. Wysocki51fac832013-01-24 00:24:48 +0100100static int acpi_thermal_remove(struct acpi_device *device);
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" \
Colin Ian King7e3cf242012-11-29 11:53:16 +0000291 "Please send acpidump to linux-acpi@vger.kernel.org", str)); \
Zhang Ruice44e192008-01-17 15:51:25 +0800292} 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
Srinivas Pandruvadaca4e7132013-01-15 23:57:16 +0100534 if (!tz->tz_enabled) {
535 pr_warn("thermal zone is disabled \n");
536 return;
537 }
Matthew Garrettb1569e92008-12-03 17:55:32 +0000538 thermal_zone_device_update(tz->thermal_zone);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539}
540
Zhang Rui3f655ef2008-01-17 15:51:11 +0800541/* sys I/F for generic thermal sysfs support */
Jean Delvare13614e32009-04-06 16:01:46 +0200542#define KELVIN_TO_MILLICELSIUS(t, off) (((t) - (off)) * 100)
Zhang, Rui5e012762008-02-28 07:51:30 +0800543
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000544static int thermal_get_temp(struct thermal_zone_device *thermal,
545 unsigned long *temp)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800546{
547 struct acpi_thermal *tz = thermal->devdata;
Zhang, Rui76ecb4f2008-04-10 16:20:23 +0800548 int result;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800549
550 if (!tz)
551 return -EINVAL;
552
Zhang, Rui76ecb4f2008-04-10 16:20:23 +0800553 result = acpi_thermal_get_temperature(tz);
554 if (result)
555 return result;
556
Jean Delvare13614e32009-04-06 16:01:46 +0200557 *temp = KELVIN_TO_MILLICELSIUS(tz->temperature, tz->kelvin_offset);
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000558 return 0;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800559}
560
Zhang Rui3f655ef2008-01-17 15:51:11 +0800561static int thermal_get_mode(struct thermal_zone_device *thermal,
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000562 enum thermal_device_mode *mode)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800563{
564 struct acpi_thermal *tz = thermal->devdata;
565
566 if (!tz)
567 return -EINVAL;
568
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000569 *mode = tz->tz_enabled ? THERMAL_DEVICE_ENABLED :
570 THERMAL_DEVICE_DISABLED;
571
572 return 0;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800573}
574
575static int thermal_set_mode(struct thermal_zone_device *thermal,
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000576 enum thermal_device_mode mode)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800577{
578 struct acpi_thermal *tz = thermal->devdata;
579 int enable;
580
581 if (!tz)
582 return -EINVAL;
583
584 /*
585 * enable/disable thermal management from ACPI thermal driver
586 */
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000587 if (mode == THERMAL_DEVICE_ENABLED)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800588 enable = 1;
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000589 else if (mode == THERMAL_DEVICE_DISABLED)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800590 enable = 0;
591 else
592 return -EINVAL;
593
594 if (enable != tz->tz_enabled) {
595 tz->tz_enabled = enable;
596 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
Zhang Rui8eaa8d62012-07-25 10:11:00 +0800597 "%s kernel ACPI thermal control\n",
598 tz->tz_enabled ? "Enable" : "Disable"));
Zhang Rui3f655ef2008-01-17 15:51:11 +0800599 acpi_thermal_check(tz);
600 }
601 return 0;
602}
603
604static int thermal_get_trip_type(struct thermal_zone_device *thermal,
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000605 int trip, enum thermal_trip_type *type)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800606{
607 struct acpi_thermal *tz = thermal->devdata;
608 int i;
609
610 if (!tz || trip < 0)
611 return -EINVAL;
612
613 if (tz->trips.critical.flags.valid) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000614 if (!trip) {
615 *type = THERMAL_TRIP_CRITICAL;
616 return 0;
617 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800618 trip--;
619 }
620
621 if (tz->trips.hot.flags.valid) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000622 if (!trip) {
623 *type = THERMAL_TRIP_HOT;
624 return 0;
625 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800626 trip--;
627 }
628
629 if (tz->trips.passive.flags.valid) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000630 if (!trip) {
631 *type = THERMAL_TRIP_PASSIVE;
632 return 0;
633 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800634 trip--;
635 }
636
637 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
638 tz->trips.active[i].flags.valid; i++) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000639 if (!trip) {
640 *type = THERMAL_TRIP_ACTIVE;
641 return 0;
642 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800643 trip--;
644 }
645
646 return -EINVAL;
647}
648
649static int thermal_get_trip_temp(struct thermal_zone_device *thermal,
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000650 int trip, unsigned long *temp)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800651{
652 struct acpi_thermal *tz = thermal->devdata;
653 int i;
654
655 if (!tz || trip < 0)
656 return -EINVAL;
657
658 if (tz->trips.critical.flags.valid) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000659 if (!trip) {
660 *temp = KELVIN_TO_MILLICELSIUS(
Jean Delvare13614e32009-04-06 16:01:46 +0200661 tz->trips.critical.temperature,
662 tz->kelvin_offset);
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000663 return 0;
664 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800665 trip--;
666 }
667
668 if (tz->trips.hot.flags.valid) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000669 if (!trip) {
670 *temp = KELVIN_TO_MILLICELSIUS(
Jean Delvare13614e32009-04-06 16:01:46 +0200671 tz->trips.hot.temperature,
672 tz->kelvin_offset);
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000673 return 0;
674 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800675 trip--;
676 }
677
678 if (tz->trips.passive.flags.valid) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000679 if (!trip) {
680 *temp = KELVIN_TO_MILLICELSIUS(
Jean Delvare13614e32009-04-06 16:01:46 +0200681 tz->trips.passive.temperature,
682 tz->kelvin_offset);
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000683 return 0;
684 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800685 trip--;
686 }
687
688 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
689 tz->trips.active[i].flags.valid; i++) {
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000690 if (!trip) {
691 *temp = KELVIN_TO_MILLICELSIUS(
Jean Delvare13614e32009-04-06 16:01:46 +0200692 tz->trips.active[i].temperature,
693 tz->kelvin_offset);
Matthew Garrett6503e5d2008-11-27 17:48:13 +0000694 return 0;
695 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800696 trip--;
697 }
698
699 return -EINVAL;
700}
701
Zhang, Rui9ec732f2008-04-10 16:13:10 +0800702static int thermal_get_crit_temp(struct thermal_zone_device *thermal,
703 unsigned long *temperature) {
704 struct acpi_thermal *tz = thermal->devdata;
705
706 if (tz->trips.critical.flags.valid) {
707 *temperature = KELVIN_TO_MILLICELSIUS(
Jean Delvare13614e32009-04-06 16:01:46 +0200708 tz->trips.critical.temperature,
709 tz->kelvin_offset);
Zhang, Rui9ec732f2008-04-10 16:13:10 +0800710 return 0;
711 } else
712 return -EINVAL;
713}
714
Zhang Rui601f3d42012-06-27 09:54:33 +0800715static int thermal_get_trend(struct thermal_zone_device *thermal,
716 int trip, enum thermal_trend *trend)
717{
718 struct acpi_thermal *tz = thermal->devdata;
719 enum thermal_trip_type type;
720 int i;
721
722 if (thermal_get_trip_type(thermal, trip, &type))
723 return -EINVAL;
724
Zhang Rui4ae46be2012-06-27 10:05:39 +0800725 if (type == THERMAL_TRIP_ACTIVE) {
Zhang Rui94a40932013-04-26 09:19:53 +0000726 unsigned long trip_temp;
727 unsigned long temp = KELVIN_TO_MILLICELSIUS(tz->temperature,
728 tz->kelvin_offset);
729 if (thermal_get_trip_temp(thermal, trip, &trip_temp))
730 return -EINVAL;
731
732 if (temp > trip_temp) {
733 *trend = THERMAL_TREND_RAISING;
734 return 0;
735 } else {
736 /* Fall back on default trend */
737 return -EINVAL;
738 }
Zhang Rui4ae46be2012-06-27 10:05:39 +0800739 }
Zhang Rui601f3d42012-06-27 09:54:33 +0800740
741 /*
742 * tz->temperature has already been updated by generic thermal layer,
743 * before this callback being invoked
744 */
745 i = (tz->trips.passive.tc1 * (tz->temperature - tz->last_temperature))
746 + (tz->trips.passive.tc2
747 * (tz->temperature - tz->trips.passive.temperature));
748
749 if (i > 0)
750 *trend = THERMAL_TREND_RAISING;
751 else if (i < 0)
752 *trend = THERMAL_TREND_DROPPING;
753 else
754 *trend = THERMAL_TREND_STABLE;
755 return 0;
756}
757
758
Matthew Garrettb1569e92008-12-03 17:55:32 +0000759static int thermal_notify(struct thermal_zone_device *thermal, int trip,
760 enum thermal_trip_type trip_type)
761{
762 u8 type = 0;
763 struct acpi_thermal *tz = thermal->devdata;
764
765 if (trip_type == THERMAL_TRIP_CRITICAL)
766 type = ACPI_THERMAL_NOTIFY_CRITICAL;
767 else if (trip_type == THERMAL_TRIP_HOT)
768 type = ACPI_THERMAL_NOTIFY_HOT;
769 else
770 return 0;
771
772 acpi_bus_generate_proc_event(tz->device, type, 1);
773 acpi_bus_generate_netlink_event(tz->device->pnp.device_class,
Stephen Rothwellf6f5c452009-03-03 12:47:17 +1100774 dev_name(&tz->device->dev), type, 1);
Matthew Garrettb1569e92008-12-03 17:55:32 +0000775
776 if (trip_type == THERMAL_TRIP_CRITICAL && nocrt)
777 return 1;
778
779 return 0;
780}
781
Zhang Rui3f655ef2008-01-17 15:51:11 +0800782static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal,
783 struct thermal_cooling_device *cdev,
Zhang Rui9d998422012-06-26 16:35:57 +0800784 bool bind)
Zhang Rui3f655ef2008-01-17 15:51:11 +0800785{
786 struct acpi_device *device = cdev->devdata;
787 struct acpi_thermal *tz = thermal->devdata;
Zhang Rui653a00c2008-01-17 15:51:18 +0800788 struct acpi_device *dev;
789 acpi_status status;
790 acpi_handle handle;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800791 int i;
792 int j;
793 int trip = -1;
794 int result = 0;
795
796 if (tz->trips.critical.flags.valid)
797 trip++;
798
799 if (tz->trips.hot.flags.valid)
800 trip++;
801
802 if (tz->trips.passive.flags.valid) {
803 trip++;
804 for (i = 0; i < tz->trips.passive.devices.count;
805 i++) {
Zhang Rui653a00c2008-01-17 15:51:18 +0800806 handle = tz->trips.passive.devices.handles[i];
807 status = acpi_bus_get_device(handle, &dev);
Zhang Rui9d998422012-06-26 16:35:57 +0800808 if (ACPI_FAILURE(status) || dev != device)
809 continue;
810 if (bind)
811 result =
812 thermal_zone_bind_cooling_device
813 (thermal, trip, cdev,
814 THERMAL_NO_LIMIT, THERMAL_NO_LIMIT);
815 else
816 result =
817 thermal_zone_unbind_cooling_device
818 (thermal, trip, cdev);
819 if (result)
820 goto failed;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800821 }
822 }
823
824 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
825 if (!tz->trips.active[i].flags.valid)
826 break;
827 trip++;
828 for (j = 0;
829 j < tz->trips.active[i].devices.count;
830 j++) {
Zhang Rui653a00c2008-01-17 15:51:18 +0800831 handle = tz->trips.active[i].devices.handles[j];
832 status = acpi_bus_get_device(handle, &dev);
Zhang Rui9d998422012-06-26 16:35:57 +0800833 if (ACPI_FAILURE(status) || dev != device)
834 continue;
835 if (bind)
836 result = thermal_zone_bind_cooling_device
837 (thermal, trip, cdev,
838 THERMAL_NO_LIMIT, THERMAL_NO_LIMIT);
839 else
840 result = thermal_zone_unbind_cooling_device
841 (thermal, trip, cdev);
842 if (result)
843 goto failed;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800844 }
845 }
846
847 for (i = 0; i < tz->devices.count; i++) {
Zhang Rui653a00c2008-01-17 15:51:18 +0800848 handle = tz->devices.handles[i];
849 status = acpi_bus_get_device(handle, &dev);
850 if (ACPI_SUCCESS(status) && (dev == device)) {
Zhang Rui9d998422012-06-26 16:35:57 +0800851 if (bind)
852 result = thermal_zone_bind_cooling_device
853 (thermal, -1, cdev,
854 THERMAL_NO_LIMIT,
855 THERMAL_NO_LIMIT);
856 else
857 result = thermal_zone_unbind_cooling_device
858 (thermal, -1, cdev);
Zhang Rui653a00c2008-01-17 15:51:18 +0800859 if (result)
860 goto failed;
861 }
Zhang Rui3f655ef2008-01-17 15:51:11 +0800862 }
863
864failed:
865 return result;
866}
867
868static int
869acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal,
870 struct thermal_cooling_device *cdev)
871{
Zhang Rui9d998422012-06-26 16:35:57 +0800872 return acpi_thermal_cooling_device_cb(thermal, cdev, true);
Zhang Rui3f655ef2008-01-17 15:51:11 +0800873}
874
875static int
876acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal,
877 struct thermal_cooling_device *cdev)
878{
Zhang Rui9d998422012-06-26 16:35:57 +0800879 return acpi_thermal_cooling_device_cb(thermal, cdev, false);
Zhang Rui3f655ef2008-01-17 15:51:11 +0800880}
881
Vasiliy Kulikov9c8b04b2011-06-25 21:07:52 +0400882static const struct thermal_zone_device_ops acpi_thermal_zone_ops = {
Zhang Rui3f655ef2008-01-17 15:51:11 +0800883 .bind = acpi_thermal_bind_cooling_device,
884 .unbind = acpi_thermal_unbind_cooling_device,
885 .get_temp = thermal_get_temp,
886 .get_mode = thermal_get_mode,
887 .set_mode = thermal_set_mode,
888 .get_trip_type = thermal_get_trip_type,
889 .get_trip_temp = thermal_get_trip_temp,
Zhang, Rui9ec732f2008-04-10 16:13:10 +0800890 .get_crit_temp = thermal_get_crit_temp,
Zhang Rui601f3d42012-06-27 09:54:33 +0800891 .get_trend = thermal_get_trend,
Matthew Garrettb1569e92008-12-03 17:55:32 +0000892 .notify = thermal_notify,
Zhang Rui3f655ef2008-01-17 15:51:11 +0800893};
894
895static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
896{
897 int trips = 0;
898 int result;
Zhang Rui20733932008-01-17 15:51:21 +0800899 acpi_status status;
Zhang Rui3f655ef2008-01-17 15:51:11 +0800900 int i;
901
902 if (tz->trips.critical.flags.valid)
903 trips++;
904
905 if (tz->trips.hot.flags.valid)
906 trips++;
907
908 if (tz->trips.passive.flags.valid)
909 trips++;
910
911 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
912 tz->trips.active[i].flags.valid; i++, trips++);
Matthew Garrettb1569e92008-12-03 17:55:32 +0000913
914 if (tz->trips.passive.flags.valid)
915 tz->thermal_zone =
Durgadoss Rc56f5c02012-07-25 10:10:58 +0800916 thermal_zone_device_register("acpitz", trips, 0, tz,
Durgadoss R50125a92012-09-18 11:04:56 +0530917 &acpi_thermal_zone_ops, NULL,
Matthew Garrettb1569e92008-12-03 17:55:32 +0000918 tz->trips.passive.tsp*100,
919 tz->polling_frequency*100);
920 else
921 tz->thermal_zone =
Durgadoss Rc56f5c02012-07-25 10:10:58 +0800922 thermal_zone_device_register("acpitz", trips, 0, tz,
Durgadoss R50125a92012-09-18 11:04:56 +0530923 &acpi_thermal_zone_ops, NULL,
924 0, tz->polling_frequency*100);
Krzysztof Heltbb070e42008-04-08 17:41:52 -0700925 if (IS_ERR(tz->thermal_zone))
Zhang Rui3f655ef2008-01-17 15:51:11 +0800926 return -ENODEV;
927
928 result = sysfs_create_link(&tz->device->dev.kobj,
929 &tz->thermal_zone->device.kobj, "thermal_zone");
930 if (result)
931 return result;
932
933 result = sysfs_create_link(&tz->thermal_zone->device.kobj,
934 &tz->device->dev.kobj, "device");
935 if (result)
936 return result;
937
Zhang Rui20733932008-01-17 15:51:21 +0800938 status = acpi_attach_data(tz->device->handle,
939 acpi_bus_private_data_handler,
940 tz->thermal_zone);
941 if (ACPI_FAILURE(status)) {
Lin Ming55ac9a02008-09-28 14:51:56 +0800942 printk(KERN_ERR PREFIX
943 "Error attaching device data\n");
Zhang Rui20733932008-01-17 15:51:21 +0800944 return -ENODEV;
945 }
946
Zhang Rui3f655ef2008-01-17 15:51:11 +0800947 tz->tz_enabled = 1;
948
Greg Kroah-Hartmanfc3a8822008-05-02 06:02:41 +0200949 dev_info(&tz->device->dev, "registered as thermal_zone%d\n",
950 tz->thermal_zone->id);
Zhang Rui3f655ef2008-01-17 15:51:11 +0800951 return 0;
952}
953
954static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz)
955{
956 sysfs_remove_link(&tz->device->dev.kobj, "thermal_zone");
957 sysfs_remove_link(&tz->thermal_zone->device.kobj, "device");
958 thermal_zone_device_unregister(tz->thermal_zone);
959 tz->thermal_zone = NULL;
Zhang Rui20733932008-01-17 15:51:21 +0800960 acpi_detach_data(tz->device->handle, acpi_bus_private_data_handler);
Zhang Rui3f655ef2008-01-17 15:51:11 +0800961}
962
963
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964/* --------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -0700965 Driver Interface
966 -------------------------------------------------------------------------- */
967
Bjorn Helgaas342d5502009-04-07 15:37:06 +0000968static void acpi_thermal_notify(struct acpi_device *device, u32 event)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700969{
Bjorn Helgaas342d5502009-04-07 15:37:06 +0000970 struct acpi_thermal *tz = acpi_driver_data(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971
Linus Torvalds1da177e2005-04-16 15:20:36 -0700972
973 if (!tz)
Patrick Mocheld550d982006-06-27 00:41:40 -0400974 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700975
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976 switch (event) {
977 case ACPI_THERMAL_NOTIFY_TEMPERATURE:
978 acpi_thermal_check(tz);
979 break;
980 case ACPI_THERMAL_NOTIFY_THRESHOLDS:
Zhang Ruice44e192008-01-17 15:51:25 +0800981 acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_THRESHOLDS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982 acpi_thermal_check(tz);
Len Brown14e04fb2007-08-23 15:20:26 -0400983 acpi_bus_generate_proc_event(device, event, 0);
Zhang Rui962ce8c2007-08-23 01:24:31 +0800984 acpi_bus_generate_netlink_event(device->pnp.device_class,
Kay Sievers07944692008-10-30 01:18:59 +0100985 dev_name(&device->dev), event, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986 break;
987 case ACPI_THERMAL_NOTIFY_DEVICES:
Zhang Ruice44e192008-01-17 15:51:25 +0800988 acpi_thermal_trips_update(tz, ACPI_TRIPS_REFRESH_DEVICES);
989 acpi_thermal_check(tz);
Len Brown14e04fb2007-08-23 15:20:26 -0400990 acpi_bus_generate_proc_event(device, event, 0);
Zhang Rui962ce8c2007-08-23 01:24:31 +0800991 acpi_bus_generate_netlink_event(device->pnp.device_class,
Kay Sievers07944692008-10-30 01:18:59 +0100992 dev_name(&device->dev), event, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700993 break;
994 default:
995 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
Len Brown4be44fc2005-08-05 00:44:28 -0400996 "Unsupported event [0x%x]\n", event));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700997 break;
998 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999}
1000
Zhang Rui261cba22012-11-27 20:42:11 +01001001/*
1002 * On some platforms, the AML code has dependency about
1003 * the evaluating order of _TMP and _CRT/_HOT/_PSV/_ACx.
1004 * 1. On HP Pavilion G4-1016tx, _TMP must be invoked after
1005 * /_CRT/_HOT/_PSV/_ACx, or else system will be power off.
1006 * 2. On HP Compaq 6715b/6715s, the return value of _PSV is 0
1007 * if _TMP has never been evaluated.
1008 *
1009 * As this dependency is totally transparent to OS, evaluate
1010 * all of them once, in the order of _CRT/_HOT/_PSV/_ACx,
1011 * _TMP, before they are actually used.
1012 */
1013static void acpi_thermal_aml_dependency_fix(struct acpi_thermal *tz)
1014{
1015 acpi_handle handle = tz->device->handle;
1016 unsigned long long value;
1017 int i;
1018
1019 acpi_evaluate_integer(handle, "_CRT", NULL, &value);
1020 acpi_evaluate_integer(handle, "_HOT", NULL, &value);
1021 acpi_evaluate_integer(handle, "_PSV", NULL, &value);
1022 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
1023 char name[5] = { '_', 'A', 'C', ('0' + i), '\0' };
1024 acpi_status status;
1025
1026 status = acpi_evaluate_integer(handle, name, NULL, &value);
1027 if (status == AE_NOT_FOUND)
1028 break;
1029 }
1030 acpi_evaluate_integer(handle, "_TMP", NULL, &value);
1031}
1032
Len Brown4be44fc2005-08-05 00:44:28 -04001033static int acpi_thermal_get_info(struct acpi_thermal *tz)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001034{
Len Brown4be44fc2005-08-05 00:44:28 -04001035 int result = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001036
Linus Torvalds1da177e2005-04-16 15:20:36 -07001037
1038 if (!tz)
Patrick Mocheld550d982006-06-27 00:41:40 -04001039 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040
Zhang Rui261cba22012-11-27 20:42:11 +01001041 acpi_thermal_aml_dependency_fix(tz);
1042
Matthew Garrett9bcb8112012-02-01 10:26:54 -05001043 /* Get trip points [_CRT, _PSV, etc.] (required) */
1044 result = acpi_thermal_get_trip_points(tz);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001045 if (result)
Patrick Mocheld550d982006-06-27 00:41:40 -04001046 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001047
Matthew Garrett9bcb8112012-02-01 10:26:54 -05001048 /* Get temperature [_TMP] (required) */
1049 result = acpi_thermal_get_temperature(tz);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001050 if (result)
Patrick Mocheld550d982006-06-27 00:41:40 -04001051 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052
1053 /* Set the cooling mode [_SCP] to active cooling (default) */
1054 result = acpi_thermal_set_cooling_mode(tz, ACPI_THERMAL_MODE_ACTIVE);
Len Brown4be44fc2005-08-05 00:44:28 -04001055 if (!result)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001056 tz->flags.cooling_mode = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001057
1058 /* Get default polling frequency [_TZP] (optional) */
1059 if (tzp)
1060 tz->polling_frequency = tzp;
1061 else
1062 acpi_thermal_get_polling_frequency(tz);
1063
Patrick Mocheld550d982006-06-27 00:41:40 -04001064 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001065}
1066
Jean Delvare13614e32009-04-06 16:01:46 +02001067/*
1068 * The exact offset between Kelvin and degree Celsius is 273.15. However ACPI
1069 * handles temperature values with a single decimal place. As a consequence,
1070 * some implementations use an offset of 273.1 and others use an offset of
1071 * 273.2. Try to find out which one is being used, to present the most
1072 * accurate and visually appealing number.
1073 *
1074 * The heuristic below should work for all ACPI thermal zones which have a
1075 * critical trip point with a value being a multiple of 0.5 degree Celsius.
1076 */
1077static void acpi_thermal_guess_offset(struct acpi_thermal *tz)
1078{
1079 if (tz->trips.critical.flags.valid &&
1080 (tz->trips.critical.temperature % 5) == 1)
1081 tz->kelvin_offset = 2731;
1082 else
1083 tz->kelvin_offset = 2732;
1084}
1085
Len Brown4be44fc2005-08-05 00:44:28 -04001086static int acpi_thermal_add(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001087{
Len Brown4be44fc2005-08-05 00:44:28 -04001088 int result = 0;
Len Brown4be44fc2005-08-05 00:44:28 -04001089 struct acpi_thermal *tz = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091
1092 if (!device)
Patrick Mocheld550d982006-06-27 00:41:40 -04001093 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094
Burman Yan36bcbec2006-12-19 12:56:11 -08001095 tz = kzalloc(sizeof(struct acpi_thermal), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001096 if (!tz)
Patrick Mocheld550d982006-06-27 00:41:40 -04001097 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098
Patrick Mochel8348e1b2006-05-19 16:54:40 -04001099 tz->device = device;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100 strcpy(tz->name, device->pnp.bus_id);
1101 strcpy(acpi_device_name(device), ACPI_THERMAL_DEVICE_NAME);
1102 strcpy(acpi_device_class(device), ACPI_THERMAL_CLASS);
Pavel Machekdb89b4f2008-09-22 14:37:34 -07001103 device->driver_data = tz;
Alexey Starikovskiy6e215782007-09-01 00:11:59 +04001104 mutex_init(&tz->lock);
Zhang Rui3f655ef2008-01-17 15:51:11 +08001105
1106
Linus Torvalds1da177e2005-04-16 15:20:36 -07001107 result = acpi_thermal_get_info(tz);
1108 if (result)
Zhang Rui3f655ef2008-01-17 15:51:11 +08001109 goto free_memory;
1110
Jean Delvare13614e32009-04-06 16:01:46 +02001111 acpi_thermal_guess_offset(tz);
1112
Zhang Rui3f655ef2008-01-17 15:51:11 +08001113 result = acpi_thermal_register_thermal_zone(tz);
1114 if (result)
1115 goto free_memory;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116
Linus Torvalds1da177e2005-04-16 15:20:36 -07001117 printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n",
Len Brown4be44fc2005-08-05 00:44:28 -04001118 acpi_device_name(device), acpi_device_bid(device),
1119 KELVIN_TO_CELSIUS(tz->temperature));
Zhang Rui3f655ef2008-01-17 15:51:11 +08001120 goto end;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001121
Zhang Rui3f655ef2008-01-17 15:51:11 +08001122free_memory:
1123 kfree(tz);
1124end:
Patrick Mocheld550d982006-06-27 00:41:40 -04001125 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001126}
1127
Rafael J. Wysocki51fac832013-01-24 00:24:48 +01001128static int acpi_thermal_remove(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001129{
Len Brown4be44fc2005-08-05 00:44:28 -04001130 struct acpi_thermal *tz = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001131
Linus Torvalds1da177e2005-04-16 15:20:36 -07001132 if (!device || !acpi_driver_data(device))
Patrick Mocheld550d982006-06-27 00:41:40 -04001133 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001134
Jan Engelhardt50dd0962006-10-01 00:28:50 +02001135 tz = acpi_driver_data(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136
Zhang Rui3f655ef2008-01-17 15:51:11 +08001137 acpi_thermal_unregister_thermal_zone(tz);
Alexey Starikovskiy6e215782007-09-01 00:11:59 +04001138 mutex_destroy(&tz->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139 kfree(tz);
Patrick Mocheld550d982006-06-27 00:41:40 -04001140 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001141}
1142
Rafael J. Wysocki90692402012-08-09 23:00:02 +02001143#ifdef CONFIG_PM_SLEEP
Rafael J. Wysocki167cffb2012-06-27 23:26:18 +02001144static int acpi_thermal_resume(struct device *dev)
Konstantin Karasyov74ce14682006-05-08 08:32:00 -04001145{
Rafael J. Wysocki167cffb2012-06-27 23:26:18 +02001146 struct acpi_thermal *tz;
Konstantin Karasyovb1028c52007-02-16 02:23:07 -05001147 int i, j, power_state, result;
1148
Rafael J. Wysocki167cffb2012-06-27 23:26:18 +02001149 if (!dev)
Patrick Mocheld550d982006-06-27 00:41:40 -04001150 return -EINVAL;
Konstantin Karasyov74ce14682006-05-08 08:32:00 -04001151
Rafael J. Wysocki167cffb2012-06-27 23:26:18 +02001152 tz = acpi_driver_data(to_acpi_device(dev));
1153 if (!tz)
1154 return -EINVAL;
Konstantin Karasyov74ce14682006-05-08 08:32:00 -04001155
Konstantin Karasyovbed936f2006-07-10 04:44:26 -07001156 for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) {
Konstantin Karasyovb1028c52007-02-16 02:23:07 -05001157 if (!(&tz->trips.active[i]))
1158 break;
1159 if (!tz->trips.active[i].flags.valid)
1160 break;
1161 tz->trips.active[i].flags.enabled = 1;
1162 for (j = 0; j < tz->trips.active[i].devices.count; j++) {
Rafael J. Wysocki488a76c2010-11-25 00:11:24 +01001163 result = acpi_bus_update_power(
1164 tz->trips.active[i].devices.handles[j],
1165 &power_state);
Konstantin Karasyovb1028c52007-02-16 02:23:07 -05001166 if (result || (power_state != ACPI_STATE_D0)) {
1167 tz->trips.active[i].flags.enabled = 0;
1168 break;
1169 }
Konstantin Karasyovbed936f2006-07-10 04:44:26 -07001170 }
Konstantin Karasyovb1028c52007-02-16 02:23:07 -05001171 tz->state.active |= tz->trips.active[i].flags.enabled;
Konstantin Karasyovbed936f2006-07-10 04:44:26 -07001172 }
1173
Konstantin Karasyovb1028c52007-02-16 02:23:07 -05001174 acpi_thermal_check(tz);
Konstantin Karasyov74ce14682006-05-08 08:32:00 -04001175
1176 return AE_OK;
1177}
Rafael J. Wysocki90692402012-08-09 23:00:02 +02001178#endif
Konstantin Karasyov74ce14682006-05-08 08:32:00 -04001179
Jeff Garzik18552562007-10-03 15:15:40 -04001180static int thermal_act(const struct dmi_system_id *d) {
Len Brown0b5bfa12007-08-12 00:13:02 -04001181
1182 if (act == 0) {
1183 printk(KERN_NOTICE "ACPI: %s detected: "
1184 "disabling all active thermal trip points\n", d->ident);
1185 act = -1;
1186 }
1187 return 0;
1188}
Jeff Garzik18552562007-10-03 15:15:40 -04001189static int thermal_nocrt(const struct dmi_system_id *d) {
Len Brown8c99fdc2007-08-20 18:46:50 -04001190
1191 printk(KERN_NOTICE "ACPI: %s detected: "
1192 "disabling all critical thermal trip point actions.\n", d->ident);
1193 nocrt = 1;
1194 return 0;
1195}
Jeff Garzik18552562007-10-03 15:15:40 -04001196static int thermal_tzp(const struct dmi_system_id *d) {
Len Brown0b5bfa12007-08-12 00:13:02 -04001197
1198 if (tzp == 0) {
1199 printk(KERN_NOTICE "ACPI: %s detected: "
1200 "enabling thermal zone polling\n", d->ident);
1201 tzp = 300; /* 300 dS = 30 Seconds */
1202 }
1203 return 0;
1204}
Jeff Garzik18552562007-10-03 15:15:40 -04001205static int thermal_psv(const struct dmi_system_id *d) {
Len Brown0b5bfa12007-08-12 00:13:02 -04001206
1207 if (psv == 0) {
1208 printk(KERN_NOTICE "ACPI: %s detected: "
1209 "disabling all passive thermal trip points\n", d->ident);
1210 psv = -1;
1211 }
1212 return 0;
1213}
1214
1215static struct dmi_system_id thermal_dmi_table[] __initdata = {
1216 /*
1217 * Award BIOS on this AOpen makes thermal control almost worthless.
1218 * http://bugzilla.kernel.org/show_bug.cgi?id=8842
1219 */
1220 {
1221 .callback = thermal_act,
1222 .ident = "AOpen i915GMm-HFS",
1223 .matches = {
1224 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1225 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1226 },
1227 },
1228 {
1229 .callback = thermal_psv,
1230 .ident = "AOpen i915GMm-HFS",
1231 .matches = {
1232 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1233 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1234 },
1235 },
1236 {
1237 .callback = thermal_tzp,
1238 .ident = "AOpen i915GMm-HFS",
1239 .matches = {
1240 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
1241 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
1242 },
1243 },
Len Brown8c99fdc2007-08-20 18:46:50 -04001244 {
1245 .callback = thermal_nocrt,
1246 .ident = "Gigabyte GA-7ZX",
1247 .matches = {
1248 DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."),
1249 DMI_MATCH(DMI_BOARD_NAME, "7ZX"),
1250 },
1251 },
Len Brown0b5bfa12007-08-12 00:13:02 -04001252 {}
1253};
Len Brown0b5bfa12007-08-12 00:13:02 -04001254
Len Brown4be44fc2005-08-05 00:44:28 -04001255static int __init acpi_thermal_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001256{
Len Brown4be44fc2005-08-05 00:44:28 -04001257 int result = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001258
Len Brown0b5bfa12007-08-12 00:13:02 -04001259 dmi_check_system(thermal_dmi_table);
1260
Len Brown72b33ef2007-08-12 00:12:17 -04001261 if (off) {
1262 printk(KERN_NOTICE "ACPI: thermal control disabled\n");
1263 return -ENODEV;
1264 }
Zhang Rui43d9f872010-07-15 10:46:44 +08001265
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266 result = acpi_bus_register_driver(&acpi_thermal_driver);
Zhang Ruic57b62f2010-10-08 13:55:06 +08001267 if (result < 0)
Patrick Mocheld550d982006-06-27 00:41:40 -04001268 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269
Patrick Mocheld550d982006-06-27 00:41:40 -04001270 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001271}
1272
Len Brown4be44fc2005-08-05 00:44:28 -04001273static void __exit acpi_thermal_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001275
1276 acpi_bus_unregister_driver(&acpi_thermal_driver);
1277
Patrick Mocheld550d982006-06-27 00:41:40 -04001278 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001279}
1280
Linus Torvalds1da177e2005-04-16 15:20:36 -07001281module_init(acpi_thermal_init);
1282module_exit(acpi_thermal_exit);