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#include <linux/cpumask.h>
  29
  30#ifdef CONFIG_CPU_THERMAL
  31/**
  32 * cpufreq_cooling_register - function to create cpufreq cooling device.
  33 * @clip_cpus: cpumask of cpus where the frequency constraints will happen
  34 */
  35struct thermal_cooling_device *
  36cpufreq_cooling_register(const struct cpumask *clip_cpus);
  37
  38/**
  39 * cpufreq_cooling_unregister - function to remove cpufreq cooling device.
  40 * @cdev: thermal cooling device pointer.
  41 */
  42void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev);
  43
  44unsigned long cpufreq_cooling_get_level(unsigned int cpu, unsigned int freq);
  45#else /* !CONFIG_CPU_THERMAL */
  46static inline struct thermal_cooling_device *
  47cpufreq_cooling_register(const struct cpumask *clip_cpus)
  48{
  49        return NULL;
  50}
  51static inline
  52void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev)
  53{
  54        return;
  55}
  56static inline
  57unsigned long cpufreq_cooling_get_level(unsigned int cpu, unsigned int freq)
  58{
  59        return THERMAL_CSTATE_INVALID;
  60}
  61#endif  /* CONFIG_CPU_THERMAL */
  62
  63#endif /* __CPU_COOLING_H__ */
  64