[linux-2.6-block.git] / drivers / thermal / gov_user_space.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 *  user_space.c - A simple user space Thermal events notifier
 *
 *  Copyright (C) 2012 Intel Corp
 *  Copyright (C) 2012 Durgadoss R <durgadoss.r@intel.com>
 *
 *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */

#include <linux/slab.h>
#include <linux/thermal.h>

#include "thermal_core.h"

static int user_space_bind(struct thermal_zone_device *tz)
{
	pr_warn_once("Userspace governor deprecated: use thermal netlink " \
		     "notification instead\n");

	return 0;
}

/**
 * notify_user_space - Notifies user space about thermal events
 * @tz: thermal_zone_device
 * @trip: trip point index
 *
 * This function notifies the user space through UEvents.
 */
static int notify_user_space(struct thermal_zone_device *tz, int trip)
{
	char *thermal_prop[5];
	int i;

	mutex_lock(&tz->lock);
	thermal_prop[0] = kasprintf(GFP_KERNEL, "NAME=%s", tz->type);
	thermal_prop[1] = kasprintf(GFP_KERNEL, "TEMP=%d", tz->temperature);
	thermal_prop[2] = kasprintf(GFP_KERNEL, "TRIP=%d", trip);
	thermal_prop[3] = kasprintf(GFP_KERNEL, "EVENT=%d", tz->notify_event);
	thermal_prop[4] = NULL;
	kobject_uevent_env(&tz->device.kobj, KOBJ_CHANGE, thermal_prop);
	for (i = 0; i < 4; ++i)
		kfree(thermal_prop[i]);
	mutex_unlock(&tz->lock);
	return 0;
}

static struct thermal_governor thermal_gov_user_space = {
	.name		= "user_space",
	.throttle	= notify_user_space,
	.bind_to_tz	= user_space_bind,
};
THERMAL_GOVERNOR_DECLARE(thermal_gov_user_space);
Commit	Line	Data
873e65bc	1	// SPDX-License-Identifier: GPL-2.0-only
1cc807a2 D	2	/*
	3	* user_space.c - A simple user space Thermal events notifier
	4	*
	5	* Copyright (C) 2012 Intel Corp
	6	* Copyright (C) 2012 Durgadoss R <durgadoss.r@intel.com>
	7	*
	8	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	9	*
1cc807a2 D	10	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	11	*/
	12
998d924b	13	#include <linux/slab.h>
6abea5d2	14	#include <linux/thermal.h>
0d76d6e1	15
1cc807a2 D	16	#include "thermal_core.h"
1cc807a2 D	17
0275c9fb DL	18	static int user_space_bind(struct thermal_zone_device *tz)
0275c9fb DL	19	{
567af705 RW	20	pr_warn_once("Userspace governor deprecated: use thermal netlink " \
567af705 RW	21	"notification instead\n");
0275c9fb DL	22
	23	return 0;
	24	}
	25
1cc807a2 D	26	/**
1cc807a2 D	27	* notify_user_space - Notifies user space about thermal events
53d256e7 AK	28	* @tz: thermal_zone_device
53d256e7 AK	29	* @trip: trip point index
1cc807a2 D	30	*
	31	* This function notifies the user space through UEvents.
	32	*/
e15cb144	33	static int notify_user_space(struct thermal_zone_device *tz, int trip)
1cc807a2	34	{
998d924b SP	35	char *thermal_prop[5];
	36	int i;
	37
1cc807a2	38	mutex_lock(&tz->lock);
998d924b SP	39	thermal_prop[0] = kasprintf(GFP_KERNEL, "NAME=%s", tz->type);
	40	thermal_prop[1] = kasprintf(GFP_KERNEL, "TEMP=%d", tz->temperature);
	41	thermal_prop[2] = kasprintf(GFP_KERNEL, "TRIP=%d", trip);
	42	thermal_prop[3] = kasprintf(GFP_KERNEL, "EVENT=%d", tz->notify_event);
	43	thermal_prop[4] = NULL;
	44	kobject_uevent_env(&tz->device.kobj, KOBJ_CHANGE, thermal_prop);
	45	for (i = 0; i < 4; ++i)
	46	kfree(thermal_prop[i]);
1cc807a2 D	47	mutex_unlock(&tz->lock);
	48	return 0;
	49	}
	50
e15cb144	51	static struct thermal_governor thermal_gov_user_space = {
1cc807a2 D	52	.name = "user_space",
1cc807a2 D	53	.throttle = notify_user_space,
0275c9fb	54	.bind_to_tz = user_space_bind,
1cc807a2	55	};
57c5b2ec	56	THERMAL_GOVERNOR_DECLARE(thermal_gov_user_space);