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 #ifdef CONFIG_CPU_THERMAL 32 /** 33 * cpufreq_cooling_register - function to create cpufreq cooling device. 34 * @clip_cpus: cpumask of cpus where the frequency constraints will happen 35 */ 36 struct thermal_cooling_device * 37 cpufreq_cooling_register(const struct cpumask *clip_cpus); 38 39 /** 40 * of_cpufreq_cooling_register - create cpufreq cooling device based on DT. 41 * @np: a valid struct device_node to the cooling device device tree node. 42 * @clip_cpus: cpumask of cpus where the frequency constraints will happen 43 */ 44 #ifdef CONFIG_THERMAL_OF 45 struct thermal_cooling_device * 46 of_cpufreq_cooling_register(struct device_node *np, 47 const struct cpumask *clip_cpus); 48 #else 49 static inline struct thermal_cooling_device * 50 of_cpufreq_cooling_register(struct device_node *np, 51 const struct cpumask *clip_cpus) 52 { 53 return ERR_PTR(-ENOSYS); 54 } 55 #endif 56 57 /** 58 * cpufreq_cooling_unregister - function to remove cpufreq cooling device. 59 * @cdev: thermal cooling device pointer. 60 */ 61 void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev); 62 63 unsigned long cpufreq_cooling_get_level(unsigned int cpu, unsigned int freq); 64 #else /* !CONFIG_CPU_THERMAL */ 65 static inline struct thermal_cooling_device * 66 cpufreq_cooling_register(const struct cpumask *clip_cpus) 67 { 68 return ERR_PTR(-ENOSYS); 69 } 70 static inline struct thermal_cooling_device * 71 of_cpufreq_cooling_register(struct device_node *np, 72 const struct cpumask *clip_cpus) 73 { 74 return ERR_PTR(-ENOSYS); 75 } 76 static inline 77 void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev) 78 { 79 return; 80 } 81 static inline 82 unsigned long cpufreq_cooling_get_level(unsigned int cpu, unsigned int freq) 83 { 84 return THERMAL_CSTATE_INVALID; 85 } 86 #endif /* CONFIG_CPU_THERMAL */ 87 88 #endif /* __CPU_COOLING_H__ */ 89