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 <[email protected]> 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 typedef int (*get_static_t)(cpumask_t *cpumask, int interval, 32 unsigned long voltage, u32 *power); 33 34 #ifdef CONFIG_CPU_THERMAL 35 /** 36 * cpufreq_cooling_register - function to create cpufreq cooling device. 37 * @clip_cpus: cpumask of cpus where the frequency constraints will happen 38 */ 39 struct thermal_cooling_device * 40 cpufreq_cooling_register(const struct cpumask *clip_cpus); 41 42 struct thermal_cooling_device * 43 cpufreq_power_cooling_register(const struct cpumask *clip_cpus, 44 u32 capacitance, get_static_t plat_static_func); 45 46 /** 47 * of_cpufreq_cooling_register - create cpufreq cooling device based on DT. 48 * @np: a valid struct device_node to the cooling device device tree node. 49 * @clip_cpus: cpumask of cpus where the frequency constraints will happen 50 */ 51 #ifdef CONFIG_THERMAL_OF 52 struct thermal_cooling_device * 53 of_cpufreq_cooling_register(struct device_node *np, 54 const struct cpumask *clip_cpus); 55 56 struct thermal_cooling_device * 57 of_cpufreq_power_cooling_register(struct device_node *np, 58 const struct cpumask *clip_cpus, 59 u32 capacitance, 60 get_static_t plat_static_func); 61 #else 62 static inline struct thermal_cooling_device * 63 of_cpufreq_cooling_register(struct device_node *np, 64 const struct cpumask *clip_cpus) 65 { 66 return ERR_PTR(-ENOSYS); 67 } 68 69 static inline struct thermal_cooling_device * 70 of_cpufreq_power_cooling_register(struct device_node *np, 71 const struct cpumask *clip_cpus, 72 u32 capacitance, 73 get_static_t plat_static_func) 74 { 75 return NULL; 76 } 77 #endif 78 79 /** 80 * cpufreq_cooling_unregister - function to remove cpufreq cooling device. 81 * @cdev: thermal cooling device pointer. 82 */ 83 void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev); 84 85 #else /* !CONFIG_CPU_THERMAL */ 86 static inline struct thermal_cooling_device * 87 cpufreq_cooling_register(const struct cpumask *clip_cpus) 88 { 89 return ERR_PTR(-ENOSYS); 90 } 91 static inline struct thermal_cooling_device * 92 cpufreq_power_cooling_register(const struct cpumask *clip_cpus, 93 u32 capacitance, get_static_t plat_static_func) 94 { 95 return NULL; 96 } 97 98 static inline struct thermal_cooling_device * 99 of_cpufreq_cooling_register(struct device_node *np, 100 const struct cpumask *clip_cpus) 101 { 102 return ERR_PTR(-ENOSYS); 103 } 104 105 static inline struct thermal_cooling_device * 106 of_cpufreq_power_cooling_register(struct device_node *np, 107 const struct cpumask *clip_cpus, 108 u32 capacitance, 109 get_static_t plat_static_func) 110 { 111 return NULL; 112 } 113 114 static inline 115 void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev) 116 { 117 return; 118 } 119 #endif /* CONFIG_CPU_THERMAL */ 120 121 #endif /* __CPU_COOLING_H__ */ 122