2 * linux/include/linux/cpu_cooling.h
4 * Copyright (C) 2012 Samsung Electronics Co., Ltd(http://www.samsung.com)
5 * Copyright (C) 2012 Amit Daniel <amit.kachhap@linaro.org>
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.
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.
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.
21 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
24 #ifndef __CPU_COOLING_H__
25 #define __CPU_COOLING_H__
28 #include <linux/thermal.h>
29 #include <linux/cpumask.h>
31 typedef int (*get_static_t)(cpumask_t *cpumask, int interval,
32 unsigned long voltage, u32 *power);
34 struct cpu_cooling_ops {
35 int (*ceil_limit)(int, u32);
36 int (*get_cur_state)(int, unsigned long *);
39 #ifdef CONFIG_CPU_THERMAL
41 * cpufreq_cooling_register - function to create cpufreq cooling device.
42 * @clip_cpus: cpumask of cpus where the frequency constraints will happen
44 struct thermal_cooling_device *
45 cpufreq_cooling_register(const struct cpumask *clip_cpus);
47 struct thermal_cooling_device *
48 cpufreq_power_cooling_register(const struct cpumask *clip_cpus,
49 u32 capacitance, get_static_t plat_static_func);
51 struct thermal_cooling_device *
52 cpufreq_platform_cooling_register(const struct cpumask *clip_cpus,
53 struct cpu_cooling_ops *ops);
56 * of_cpufreq_cooling_register - create cpufreq cooling device based on DT.
57 * @np: a valid struct device_node to the cooling device device tree node.
58 * @clip_cpus: cpumask of cpus where the frequency constraints will happen
60 #ifdef CONFIG_THERMAL_OF
61 struct thermal_cooling_device *
62 of_cpufreq_cooling_register(struct device_node *np,
63 const struct cpumask *clip_cpus);
65 struct thermal_cooling_device *
66 of_cpufreq_power_cooling_register(struct device_node *np,
67 const struct cpumask *clip_cpus,
69 get_static_t plat_static_func);
71 static inline struct thermal_cooling_device *
72 of_cpufreq_cooling_register(struct device_node *np,
73 const struct cpumask *clip_cpus)
75 return ERR_PTR(-ENOSYS);
78 static inline struct thermal_cooling_device *
79 of_cpufreq_power_cooling_register(struct device_node *np,
80 const struct cpumask *clip_cpus,
82 get_static_t plat_static_func)
89 * cpufreq_cooling_unregister - function to remove cpufreq cooling device.
90 * @cdev: thermal cooling device pointer.
92 void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev);
94 unsigned long cpufreq_cooling_get_level(unsigned int cpu, unsigned int freq);
95 #else /* !CONFIG_CPU_THERMAL */
96 static inline struct thermal_cooling_device *
97 cpufreq_cooling_register(const struct cpumask *clip_cpus)
99 return ERR_PTR(-ENOSYS);
101 static inline struct thermal_cooling_device *
102 cpufreq_power_cooling_register(const struct cpumask *clip_cpus,
103 u32 capacitance, get_static_t plat_static_func)
108 static inline struct thermal_cooling_device *
109 of_cpufreq_cooling_register(struct device_node *np,
110 const struct cpumask *clip_cpus)
112 return ERR_PTR(-ENOSYS);
115 static inline struct thermal_cooling_device *
116 of_cpufreq_power_cooling_register(struct device_node *np,
117 const struct cpumask *clip_cpus,
119 get_static_t plat_static_func)
124 static inline struct thermal_cooling_device *
125 cpufreq_platform_cooling_register(const struct cpumask *clip_cpus,
126 struct cpu_cooling_ops *ops)
132 void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev)
137 unsigned long cpufreq_cooling_get_level(unsigned int cpu, unsigned int freq)
139 return THERMAL_CSTATE_INVALID;
141 #endif /* CONFIG_CPU_THERMAL */
143 #endif /* __CPU_COOLING_H__ */