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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/slab.h>
#include <linux/thermal.h>
#include "thermal_core.h"
static int user_space_bind(struct thermal_zone_device *tz)
{
pr_info_once("Consider using thermal netlink events interface\n");
return 0;
}
/**
* notify_user_space - Notifies user space about thermal events
* @tz: thermal_zone_device
* @trip: trip point
* @crossed_up: whether or not the trip has been crossed on the way up
*
* This function notifies the user space through UEvents.
*/
static void notify_user_space(struct thermal_zone_device *tz,
const struct thermal_trip *trip,
bool crossed_up)
{
char *thermal_prop[5];
int i;
lockdep_assert_held(&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",
thermal_zone_trip_id(tz, 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]);
}
static struct thermal_governor thermal_gov_user_space = {
.name = "user_space",
.trip_crossed = notify_user_space,
.bind_to_tz = user_space_bind,
};
THERMAL_GOVERNOR_DECLARE(thermal_gov_user_space);
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