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 /** 45 * of_cpufreq_cooling_register - create cpufreq cooling device based on DT. 46 * @np: a valid struct device_node to the cooling device device tree node. 47 * @policy: cpufreq policy. 48 */ 49 #ifdef CONFIG_THERMAL_OF 50 struct thermal_cooling_device * 51 of_cpufreq_cooling_register(struct device_node *np, 52 struct cpufreq_policy *policy); 53 54 struct thermal_cooling_device * 55 of_cpufreq_power_cooling_register(struct cpufreq_policy *policy); 56 #else 57 static inline struct thermal_cooling_device * 58 of_cpufreq_cooling_register(struct device_node *np, 59 struct cpufreq_policy *policy) 60 { 61 return ERR_PTR(-ENOSYS); 62 } 63 64 static inline struct thermal_cooling_device * 65 of_cpufreq_power_cooling_register(struct cpufreq_policy *policy) 66 { 67 return NULL; 68 } 69 #endif 70 71 /** 72 * cpufreq_cooling_unregister - function to remove cpufreq cooling device. 73 * @cdev: thermal cooling device pointer. 74 */ 75 void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev); 76 77 #else /* !CONFIG_CPU_THERMAL */ 78 static inline struct thermal_cooling_device * 79 cpufreq_cooling_register(struct cpufreq_policy *policy) 80 { 81 return ERR_PTR(-ENOSYS); 82 } 83 84 static inline struct thermal_cooling_device * 85 of_cpufreq_cooling_register(struct device_node *np, 86 struct cpufreq_policy *policy) 87 { 88 return ERR_PTR(-ENOSYS); 89 } 90 91 static inline struct thermal_cooling_device * 92 of_cpufreq_power_cooling_register(struct cpufreq_policy *policy) 93 { 94 return NULL; 95 } 96 97 static inline 98 void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev) 99 { 100 return; 101 } 102 #endif /* CONFIG_CPU_THERMAL */ 103 104 #endif /* __CPU_COOLING_H__ */ 105