linux/drivers/thermal/user_space.c
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   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
  58
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