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 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 cpufreq_policy *policy); 60 #else 61 static inline struct thermal_cooling_device * 62 of_cpufreq_cooling_register(struct device_node *np, 63 struct cpufreq_policy *policy) 64 { 65 return ERR_PTR(-ENOSYS); 66 } 67 68 static inline struct thermal_cooling_device * 69 of_cpufreq_power_cooling_register(struct cpufreq_policy *policy) 70 { 71 return NULL; 72 } 73 #endif 74 75 /** 76 * cpufreq_cooling_unregister - function to remove cpufreq cooling device. 77 * @cdev: thermal cooling device pointer. 78 */ 79 void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev); 80 81 #else /* !CONFIG_CPU_THERMAL */ 82 static inline struct thermal_cooling_device * 83 cpufreq_cooling_register(struct cpufreq_policy *policy) 84 { 85 return ERR_PTR(-ENOSYS); 86 } 87 static inline struct thermal_cooling_device * 88 cpufreq_power_cooling_register(struct cpufreq_policy *policy, 89 u32 capacitance, get_static_t plat_static_func) 90 { 91 return NULL; 92 } 93 94 static inline struct thermal_cooling_device * 95 of_cpufreq_cooling_register(struct device_node *np, 96 struct cpufreq_policy *policy) 97 { 98 return ERR_PTR(-ENOSYS); 99 } 100 101 static inline struct thermal_cooling_device * 102 of_cpufreq_power_cooling_register(struct cpufreq_policy *policy) 103 { 104 return NULL; 105 } 106 107 static inline 108 void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev) 109 { 110 return; 111 } 112 #endif /* CONFIG_CPU_THERMAL */ 113 114 #endif /* __CPU_COOLING_H__ */ 115