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1 | /* |
2 | * devfreq_cooling: Thermal cooling device implementation for devices using | |
3 | * devfreq | |
4 | * | |
5 | * Copyright (C) 2014-2015 ARM Limited | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | * This program is distributed "as is" WITHOUT ANY WARRANTY of any | |
12 | * kind, whether express or implied; without even the implied warranty | |
13 | * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | */ | |
16 | ||
17 | #ifndef __DEVFREQ_COOLING_H__ | |
18 | #define __DEVFREQ_COOLING_H__ | |
19 | ||
20 | #include <linux/devfreq.h> | |
21 | #include <linux/thermal.h> | |
22 | ||
23 | #ifdef CONFIG_DEVFREQ_THERMAL | |
24 | ||
25 | /** | |
26 | * struct devfreq_cooling_power - Devfreq cooling power ops | |
27 | * @get_static_power: Take voltage, in mV, and return the static power | |
28 | * in mW. If NULL, the static power is assumed | |
29 | * to be 0. | |
30 | * @get_dynamic_power: Take voltage, in mV, and frequency, in HZ, and | |
31 | * return the dynamic power draw in mW. If NULL, | |
32 | * a simple power model is used. | |
33 | * @dyn_power_coeff: Coefficient for the simple dynamic power model in | |
34 | * mW/(MHz mV mV). | |
35 | * If get_dynamic_power() is NULL, then the | |
36 | * dynamic power is calculated as | |
37 | * @dyn_power_coeff * frequency * voltage^2 | |
38 | */ | |
39 | struct devfreq_cooling_power { | |
40 | unsigned long (*get_static_power)(unsigned long voltage); | |
41 | unsigned long (*get_dynamic_power)(unsigned long freq, | |
42 | unsigned long voltage); | |
43 | unsigned long dyn_power_coeff; | |
44 | }; | |
45 | ||
46 | struct devfreq_cooling_device * | |
47 | of_devfreq_cooling_register_power(struct device_node *np, struct devfreq *df, | |
48 | struct devfreq_cooling_power *dfc_power); | |
49 | struct devfreq_cooling_device * | |
50 | of_devfreq_cooling_register(struct device_node *np, struct devfreq *df); | |
51 | struct devfreq_cooling_device *devfreq_cooling_register(struct devfreq *df); | |
52 | void devfreq_cooling_unregister(struct devfreq_cooling_device *dfc); | |
53 | ||
54 | #else /* !CONFIG_DEVFREQ_THERMAL */ | |
55 | ||
56 | struct devfreq_cooling_device * | |
57 | of_devfreq_cooling_register_power(struct device_node *np, struct devfreq *df, | |
58 | struct devfreq_cooling_power *dfc_power) | |
59 | { | |
60 | return ERR_PTR(-EINVAL); | |
61 | } | |
62 | ||
63 | static inline struct devfreq_cooling_device * | |
64 | of_devfreq_cooling_register(struct device_node *np, struct devfreq *df) | |
65 | { | |
66 | return ERR_PTR(-EINVAL); | |
67 | } | |
68 | ||
69 | static inline struct devfreq_cooling_device * | |
70 | devfreq_cooling_register(struct devfreq *df) | |
71 | { | |
72 | return ERR_PTR(-EINVAL); | |
73 | } | |
74 | ||
75 | static inline void | |
76 | devfreq_cooling_unregister(struct devfreq_cooling_device *dfc) | |
77 | { | |
78 | } | |
79 | ||
80 | #endif /* CONFIG_DEVFREQ_THERMAL */ | |
81 | #endif /* __DEVFREQ_COOLING_H__ */ |