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a76caf55 ØE |
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 | ||
a76caf55 ØE |
23 | |
24 | /** | |
25 | * struct devfreq_cooling_power - Devfreq cooling power ops | |
26 | * @get_static_power: Take voltage, in mV, and return the static power | |
27 | * in mW. If NULL, the static power is assumed | |
28 | * to be 0. | |
29 | * @get_dynamic_power: Take voltage, in mV, and frequency, in HZ, and | |
30 | * return the dynamic power draw in mW. If NULL, | |
31 | * a simple power model is used. | |
32 | * @dyn_power_coeff: Coefficient for the simple dynamic power model in | |
33 | * mW/(MHz mV mV). | |
34 | * If get_dynamic_power() is NULL, then the | |
35 | * dynamic power is calculated as | |
36 | * @dyn_power_coeff * frequency * voltage^2 | |
37 | */ | |
38 | struct devfreq_cooling_power { | |
3aa53743 JM |
39 | unsigned long (*get_static_power)(struct devfreq *devfreq, |
40 | unsigned long voltage); | |
41 | unsigned long (*get_dynamic_power)(struct devfreq *devfreq, | |
42 | unsigned long freq, | |
a76caf55 ØE |
43 | unsigned long voltage); |
44 | unsigned long dyn_power_coeff; | |
45 | }; | |
46 | ||
1cea4e77 LL |
47 | #ifdef CONFIG_DEVFREQ_THERMAL |
48 | ||
3c99c2ce | 49 | struct thermal_cooling_device * |
a76caf55 ØE |
50 | of_devfreq_cooling_register_power(struct device_node *np, struct devfreq *df, |
51 | struct devfreq_cooling_power *dfc_power); | |
3c99c2ce | 52 | struct thermal_cooling_device * |
a76caf55 | 53 | of_devfreq_cooling_register(struct device_node *np, struct devfreq *df); |
3c99c2ce JM |
54 | struct thermal_cooling_device *devfreq_cooling_register(struct devfreq *df); |
55 | void devfreq_cooling_unregister(struct thermal_cooling_device *dfc); | |
a76caf55 ØE |
56 | |
57 | #else /* !CONFIG_DEVFREQ_THERMAL */ | |
58 | ||
3c99c2ce | 59 | struct thermal_cooling_device * |
a76caf55 ØE |
60 | of_devfreq_cooling_register_power(struct device_node *np, struct devfreq *df, |
61 | struct devfreq_cooling_power *dfc_power) | |
62 | { | |
63 | return ERR_PTR(-EINVAL); | |
64 | } | |
65 | ||
3c99c2ce | 66 | static inline struct thermal_cooling_device * |
a76caf55 ØE |
67 | of_devfreq_cooling_register(struct device_node *np, struct devfreq *df) |
68 | { | |
69 | return ERR_PTR(-EINVAL); | |
70 | } | |
71 | ||
3c99c2ce | 72 | static inline struct thermal_cooling_device * |
a76caf55 ØE |
73 | devfreq_cooling_register(struct devfreq *df) |
74 | { | |
75 | return ERR_PTR(-EINVAL); | |
76 | } | |
77 | ||
78 | static inline void | |
3c99c2ce | 79 | devfreq_cooling_unregister(struct thermal_cooling_device *dfc) |
a76caf55 ØE |
80 | { |
81 | } | |
82 | ||
83 | #endif /* CONFIG_DEVFREQ_THERMAL */ | |
84 | #endif /* __DEVFREQ_COOLING_H__ */ |