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 */
35static 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
43static struct thermal_governor thermal_gov_user_space = {
44	.name		= "user_space",
45	.throttle	= notify_user_space,
46};
47
48int thermal_gov_user_space_register(void)
49{
50	return thermal_register_governor(&thermal_gov_user_space);
51}
52
53void thermal_gov_user_space_unregister(void)
54{
55	thermal_unregister_governor(&thermal_gov_user_space);
56}
57

 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#include <linux/slab.h>
27#include "thermal_core.h"
28
29/**
30 * notify_user_space - Notifies user space about thermal events
31 * @tz - thermal_zone_device
32 * @trip - Trip point index
33 *
34 * This function notifies the user space through UEvents.
35 */
36static int notify_user_space(struct thermal_zone_device *tz, int trip)
37{
38	char *thermal_prop[5];
39	int i;
40
41	mutex_lock(&tz->lock);
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]);
50	mutex_unlock(&tz->lock);
51	return 0;
52}
53
54static struct thermal_governor thermal_gov_user_space = {
55	.name		= "user_space",
56	.throttle	= notify_user_space,
57};
58
59int thermal_gov_user_space_register(void)
60{
61	return thermal_register_governor(&thermal_gov_user_space);
62}
63
64void thermal_gov_user_space_unregister(void)
65{
66	thermal_unregister_governor(&thermal_gov_user_space);
67}
68