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 #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  */
  35 struct thermal_cooling_device *
  36 cpufreq_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  */
  42 void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev);
  43
  44 unsigned long cpufreq_cooling_get_level(unsigned int cpu, unsigned int freq);
  45 #else /* !CONFIG_CPU_THERMAL */
  46 static inline struct thermal_cooling_device *
  47 cpufreq_cooling_register(const struct cpumask *clip_cpus)
  48 {
  49         return NULL;
  50 }
  51 static inline
  52 void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev)
  53 {
  54         return;
  55 }
  56 static inline
  57 unsigned 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__ */