include/linux/cpu_cooling.h

   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  */
  37 struct 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  */
  44 void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev);
  45 #else /* !CONFIG_CPU_THERMAL */
  46 static inline struct thermal_cooling_device *cpufreq_cooling_register(
  47         const struct cpumask *clip_cpus)
  48 {
  49         return NULL;
  50 }
  51 static 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__ */