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// 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/thermal.h>
#include <linux/slab.h>
#include "thermal_core.h"
/**
* 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,
};
int thermal_gov_user_space_register(void)
{
return thermal_register_governor(&thermal_gov_user_space);
}
void thermal_gov_user_space_unregister(void)
{
thermal_unregister_governor(&thermal_gov_user_space);
}
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