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1cc807a2 D |
1 | /* |
2 | * user_space.c - A simple user space Thermal events notifier | |
3 | * | |
4 | * Copyright (C) 2012 Intel Corp | |
5 | * Copyright (C) 2012 Durgadoss R <durgadoss.r@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; version 2 of the License. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License along | |
19 | * with this program; if not, write to the Free Software Foundation, Inc., | |
20 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
21 | * | |
22 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
23 | */ | |
24 | ||
1cc807a2 | 25 | #include <linux/thermal.h> |
998d924b | 26 | #include <linux/slab.h> |
1cc807a2 D |
27 | #include "thermal_core.h" |
28 | ||
29 | /** | |
30 | * notify_user_space - Notifies user space about thermal events | |
31 | * @tz - thermal_zone_device | |
998d924b | 32 | * @trip - Trip point index |
1cc807a2 D |
33 | * |
34 | * This function notifies the user space through UEvents. | |
35 | */ | |
e15cb144 | 36 | static int notify_user_space(struct thermal_zone_device *tz, int trip) |
1cc807a2 | 37 | { |
998d924b SP |
38 | char *thermal_prop[5]; |
39 | int i; | |
40 | ||
1cc807a2 | 41 | mutex_lock(&tz->lock); |
998d924b SP |
42 | thermal_prop[0] = kasprintf(GFP_KERNEL, "NAME=%s", tz->type); |
43 | thermal_prop[1] = kasprintf(GFP_KERNEL, "TEMP=%d", tz->temperature); | |
44 | thermal_prop[2] = kasprintf(GFP_KERNEL, "TRIP=%d", trip); | |
45 | thermal_prop[3] = kasprintf(GFP_KERNEL, "EVENT=%d", tz->notify_event); | |
46 | thermal_prop[4] = NULL; | |
47 | kobject_uevent_env(&tz->device.kobj, KOBJ_CHANGE, thermal_prop); | |
48 | for (i = 0; i < 4; ++i) | |
49 | kfree(thermal_prop[i]); | |
1cc807a2 D |
50 | mutex_unlock(&tz->lock); |
51 | return 0; | |
52 | } | |
53 | ||
e15cb144 | 54 | static struct thermal_governor thermal_gov_user_space = { |
1cc807a2 D |
55 | .name = "user_space", |
56 | .throttle = notify_user_space, | |
1cc807a2 D |
57 | }; |
58 | ||
80a26a5c | 59 | int thermal_gov_user_space_register(void) |
1cc807a2 D |
60 | { |
61 | return thermal_register_governor(&thermal_gov_user_space); | |
62 | } | |
63 | ||
80a26a5c | 64 | void thermal_gov_user_space_unregister(void) |
1cc807a2 D |
65 | { |
66 | thermal_unregister_governor(&thermal_gov_user_space); | |
67 | } | |
68 |