LXR linux/include/linux/cpu

   1/*
   2 *  linux/include/linux/cpu_cooling.h
   3 *
   4 *  Copyright (C) 2012  Samsung Electronics Co., Ltd(http://www.samsung.com)
   5 *  Copyright (C) 2012  Amit Daniel <amit.kachhap@linaro.org>
   6 *
   7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   8 *  This program is free software; you can redistribute it and/or modify
   9 *  it under the terms of the GNU General Public License as published by
  10 *  the Free Software Foundation; version 2 of the License.
  11 *
  12 *  This program is distributed in the hope that it will be useful, but
  13 *  WITHOUT ANY WARRANTY; without even the implied warranty of
  14 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15 *  General Public License for more details.
  16 *
  17 *  You should have received a copy of the GNU General Public License along
  18 *  with this program; if not, write to the Free Software Foundation, Inc.,
  19 *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  20 *
  21 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  22 */
  23
  24#ifndef __CPU_COOLING_H__
  25#define __CPU_COOLING_H__
  26
  27#include <linux/thermal.h>
  28
  29#define CPUFREQ_COOLING_START           0
  30#define CPUFREQ_COOLING_STOP            1
  31
  32#if defined(CONFIG_CPU_THERMAL) || defined(CONFIG_CPU_THERMAL_MODULE)
  33/**
  34 * cpufreq_cooling_register - function to create cpufreq cooling device.
  35 * @clip_cpus: cpumask of cpus where the frequency constraints will happen
  36 */
  37struct thermal_cooling_device *cpufreq_cooling_register(
  38                const struct cpumask *clip_cpus);
  39
  40/**
  41 * cpufreq_cooling_unregister - function to remove cpufreq cooling device.
  42 * @cdev: thermal cooling device pointer.
  43 */
  44void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev);
  45#else /* !CONFIG_CPU_THERMAL */
  46static inline struct thermal_cooling_device *cpufreq_cooling_register(
  47        const struct cpumask *clip_cpus)
  48{
  49        return NULL;
  50}
  51static inline void cpufreq_cooling_unregister(
  52                struct thermal_cooling_device *cdev)
  53{
  54        return;
  55}
  56#endif  /* CONFIG_CPU_THERMAL */
  57
  58#endif /* __CPU_COOLING_H__ */
  59