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 typedef int (*get_static_t)(cpumask_t *cpumask, int interval,
  34                             unsigned long voltage, u32 *power);
  35
  36 #ifdef CONFIG_CPU_THERMAL
  37 /**
  38  * cpufreq_cooling_register - function to create cpufreq cooling device.
  39  * @policy: cpufreq policy.
  40  */
  41 struct thermal_cooling_device *
  42 cpufreq_cooling_register(struct cpufreq_policy *policy);
  43
  44 struct thermal_cooling_device *
  45 cpufreq_power_cooling_register(struct cpufreq_policy *policy,
  46                                u32 capacitance, get_static_t plat_static_func);
  47
  48 /**
  49  * of_cpufreq_cooling_register - create cpufreq cooling device based on DT.
  50  * @np: a valid struct device_node to the cooling device device tree node.
  51  * @policy: cpufreq policy.
  52  */
  53 #ifdef CONFIG_THERMAL_OF
  54 struct thermal_cooling_device *
  55 of_cpufreq_cooling_register(struct device_node *np,
  56                             struct cpufreq_policy *policy);
  57
  58 struct thermal_cooling_device *
  59 of_cpufreq_power_cooling_register(struct device_node *np,
  60                                   struct cpufreq_policy *policy,
  61                                   u32 capacitance,
  62                                   get_static_t plat_static_func);
  63 #else
  64 static inline struct thermal_cooling_device *
  65 of_cpufreq_cooling_register(struct device_node *np,
  66                             struct cpufreq_policy *policy)
  67 {
  68         return ERR_PTR(-ENOSYS);
  69 }
  70
  71 static inline struct thermal_cooling_device *
  72 of_cpufreq_power_cooling_register(struct device_node *np,
  73                                   struct cpufreq_policy *policy,
  74                                   u32 capacitance,
  75                                   get_static_t plat_static_func)
  76 {
  77         return NULL;
  78 }
  79 #endif
  80
  81 /**
  82  * cpufreq_cooling_unregister - function to remove cpufreq cooling device.
  83  * @cdev: thermal cooling device pointer.
  84  */
  85 void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev);
  86
  87 #else /* !CONFIG_CPU_THERMAL */
  88 static inline struct thermal_cooling_device *
  89 cpufreq_cooling_register(struct cpufreq_policy *policy)
  90 {
  91         return ERR_PTR(-ENOSYS);
  92 }
  93 static inline struct thermal_cooling_device *
  94 cpufreq_power_cooling_register(struct cpufreq_policy *policy,
  95                                u32 capacitance, get_static_t plat_static_func)
  96 {
  97         return NULL;
  98 }
  99
 100 static inline struct thermal_cooling_device *
 101 of_cpufreq_cooling_register(struct device_node *np,
 102                             struct cpufreq_policy *policy)
 103 {
 104         return ERR_PTR(-ENOSYS);
 105 }
 106
 107 static inline struct thermal_cooling_device *
 108 of_cpufreq_power_cooling_register(struct device_node *np,
 109                                   struct cpufreq_policy *policy,
 110                                   u32 capacitance,
 111                                   get_static_t plat_static_func)
 112 {
 113         return NULL;
 114 }
 115
 116 static inline
 117 void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev)
 118 {
 119         return;
 120 }
 121 #endif  /* CONFIG_CPU_THERMAL */
 122
 123 #endif /* __CPU_COOLING_H__ */