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/of.h>
  28 #include <linux/thermal.h>
  29 #include <linux/cpumask.h>
  30
  31 struct cpufreq_policy;
  32
  33 #ifdef CONFIG_CPU_THERMAL
  34 /**
  35  * cpufreq_cooling_register - function to create cpufreq cooling device.
  36  * @policy: cpufreq policy.
  37  */
  38 struct thermal_cooling_device *
  39 cpufreq_cooling_register(struct cpufreq_policy *policy);
  40
  41 /**
  42  * cpufreq_cooling_unregister - function to remove cpufreq cooling device.
  43  * @cdev: thermal cooling device pointer.
  44  */
  45 void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev);
  46
  47 #else /* !CONFIG_CPU_THERMAL */
  48 static inline struct thermal_cooling_device *
  49 cpufreq_cooling_register(struct cpufreq_policy *policy)
  50 {
  51         return ERR_PTR(-ENOSYS);
  52 }
  53
  54 static inline
  55 void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev)
  56 {
  57         return;
  58 }
  59 #endif  /* CONFIG_CPU_THERMAL */
  60
  61 #if defined(CONFIG_THERMAL_OF) && defined(CONFIG_CPU_THERMAL)
  62 /**
  63  * of_cpufreq_cooling_register - create cpufreq cooling device based on DT.
  64  * @policy: cpufreq policy.
  65  */
  66 struct thermal_cooling_device *
  67 of_cpufreq_cooling_register(struct cpufreq_policy *policy);
  68 #else
  69 static inline struct thermal_cooling_device *
  70 of_cpufreq_cooling_register(struct cpufreq_policy *policy)
  71 {
  72         return NULL;
  73 }
  74 #endif /* defined(CONFIG_THERMAL_OF) && defined(CONFIG_CPU_THERMAL) */
  75
  76 #endif /* __CPU_COOLING_H__ */