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
25 #include <linux/thermal.h>
26
27 #include "thermal_core.h"
28
29 /**
30 * notify_user_space - Notifies user space about thermal events
31 * @tz - thermal_zone_device
32 *
33 * This function notifies the user space through UEvents.
34 */
notify_user_space(struct thermal_zone_device * tz,int trip)35 static int notify_user_space(struct thermal_zone_device *tz, int trip)
36 {
37 mutex_lock(&tz->lock);
38 kobject_uevent(&tz->device.kobj, KOBJ_CHANGE);
39 mutex_unlock(&tz->lock);
40 return 0;
41 }
42
43 static struct thermal_governor thermal_gov_user_space = {
44 .name = "user_space",
45 .throttle = notify_user_space,
46 };
47
thermal_gov_user_space_register(void)48 int thermal_gov_user_space_register(void)
49 {
50 return thermal_register_governor(&thermal_gov_user_space);
51 }
52
thermal_gov_user_space_unregister(void)53 void thermal_gov_user_space_unregister(void)
54 {
55 thermal_unregister_governor(&thermal_gov_user_space);
56 }
57
58