Root/drivers/thermal/user_space.c

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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
26
27#include <linux/module.h>
28#include <linux/thermal.h>
29
30#include "thermal_core.h"
31
32/**
33 * notify_user_space - Notifies user space about thermal events
34 * @tz - thermal_zone_device
35 *
36 * This function notifies the user space through UEvents.
37 */
38static int notify_user_space(struct thermal_zone_device *tz, int trip)
39{
40    mutex_lock(&tz->lock);
41    kobject_uevent(&tz->device.kobj, KOBJ_CHANGE);
42    mutex_unlock(&tz->lock);
43    return 0;
44}
45
46static struct thermal_governor thermal_gov_user_space = {
47    .name = "user_space",
48    .throttle = notify_user_space,
49    .owner = THIS_MODULE,
50};
51
52static int __init thermal_gov_user_space_init(void)
53{
54    return thermal_register_governor(&thermal_gov_user_space);
55}
56
57static void __exit thermal_gov_user_space_exit(void)
58{
59    thermal_unregister_governor(&thermal_gov_user_space);
60}
61
62/* This should load after thermal framework */
63fs_initcall(thermal_gov_user_space_init);
64module_exit(thermal_gov_user_space_exit);
65
66MODULE_AUTHOR("Durgadoss R");
67MODULE_DESCRIPTION("A user space Thermal notifier");
68MODULE_LICENSE("GPL");
69

Archive Download this file



interactive