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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 <amit.kachhap@linaro.org>
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__ */