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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * user_space.c - A simple user space Thermal events notifier4 *5 * Copyright (C) 2012 Intel Corp6 * Copyright (C) 2012 Durgadoss R <durgadoss.r@intel.com>7 *8 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~9 *10 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~11 */12 13#include <linux/slab.h>14#include <linux/thermal.h>15 16#include "thermal_core.h"17 18static int user_space_bind(struct thermal_zone_device *tz)19{20 pr_info_once("Consider using thermal netlink events interface\n");21 22 return 0;23}24 25/**26 * notify_user_space - Notifies user space about thermal events27 * @tz: thermal_zone_device28 * @trip: trip point29 * @crossed_up: whether or not the trip has been crossed on the way up30 *31 * This function notifies the user space through UEvents.32 */33static void notify_user_space(struct thermal_zone_device *tz,34 const struct thermal_trip *trip,35 bool crossed_up)36{37 char *thermal_prop[5];38 int i;39 40 lockdep_assert_held(&tz->lock);41 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",45 thermal_zone_trip_id(tz, trip));46 thermal_prop[3] = kasprintf(GFP_KERNEL, "EVENT=%d", tz->notify_event);47 thermal_prop[4] = NULL;48 kobject_uevent_env(&tz->device.kobj, KOBJ_CHANGE, thermal_prop);49 for (i = 0; i < 4; ++i)50 kfree(thermal_prop[i]);51}52 53static struct thermal_governor thermal_gov_user_space = {54 .name = "user_space",55 .trip_crossed = notify_user_space,56 .bind_to_tz = user_space_bind,57};58THERMAL_GOVERNOR_DECLARE(thermal_gov_user_space);59