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0de967f2 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
a76caf55 ØE |
2 | /* |
3 | * devfreq_cooling: Thermal cooling device implementation for devices using | |
4 | * devfreq | |
5 | * | |
6 | * Copyright (C) 2014-2015 ARM Limited | |
7 | * | |
a76caf55 ØE |
8 | */ |
9 | ||
10 | #ifndef __DEVFREQ_COOLING_H__ | |
11 | #define __DEVFREQ_COOLING_H__ | |
12 | ||
13 | #include <linux/devfreq.h> | |
14 | #include <linux/thermal.h> | |
15 | ||
a76caf55 ØE |
16 | |
17 | /** | |
18 | * struct devfreq_cooling_power - Devfreq cooling power ops | |
2be83da8 LL |
19 | * @get_real_power: When this is set, the framework uses it to ask the |
20 | * device driver for the actual power. | |
21 | * Some devices have more sophisticated methods | |
22 | * (like power counters) to approximate the actual power | |
23 | * that they use. | |
24 | * This function provides more accurate data to the | |
25 | * thermal governor. When the driver does not provide | |
26 | * such function, framework just uses pre-calculated | |
27 | * table and scale the power by 'utilization' | |
28 | * (based on 'busy_time' and 'total_time' taken from | |
29 | * devfreq 'last_status'). | |
30 | * The value returned by this function must be lower | |
31 | * or equal than the maximum power value | |
32 | * for the current state | |
33 | * (which can be found in power_table[state]). | |
34 | * When this interface is used, the power_table holds | |
35 | * max total (static + dynamic) power value for each OPP. | |
a76caf55 ØE |
36 | */ |
37 | struct devfreq_cooling_power { | |
2be83da8 LL |
38 | int (*get_real_power)(struct devfreq *df, u32 *power, |
39 | unsigned long freq, unsigned long voltage); | |
a76caf55 ØE |
40 | }; |
41 | ||
1cea4e77 LL |
42 | #ifdef CONFIG_DEVFREQ_THERMAL |
43 | ||
3c99c2ce | 44 | struct thermal_cooling_device * |
a76caf55 ØE |
45 | of_devfreq_cooling_register_power(struct device_node *np, struct devfreq *df, |
46 | struct devfreq_cooling_power *dfc_power); | |
3c99c2ce | 47 | struct thermal_cooling_device * |
a76caf55 | 48 | of_devfreq_cooling_register(struct device_node *np, struct devfreq *df); |
3c99c2ce JM |
49 | struct thermal_cooling_device *devfreq_cooling_register(struct devfreq *df); |
50 | void devfreq_cooling_unregister(struct thermal_cooling_device *dfc); | |
84e0d87c LL |
51 | struct thermal_cooling_device * |
52 | devfreq_cooling_em_register(struct devfreq *df, | |
53 | struct devfreq_cooling_power *dfc_power); | |
a76caf55 ØE |
54 | |
55 | #else /* !CONFIG_DEVFREQ_THERMAL */ | |
56 | ||
3f5b9959 | 57 | static inline struct thermal_cooling_device * |
a76caf55 ØE |
58 | of_devfreq_cooling_register_power(struct device_node *np, struct devfreq *df, |
59 | struct devfreq_cooling_power *dfc_power) | |
60 | { | |
61 | return ERR_PTR(-EINVAL); | |
62 | } | |
63 | ||
3c99c2ce | 64 | static inline struct thermal_cooling_device * |
a76caf55 ØE |
65 | of_devfreq_cooling_register(struct device_node *np, struct devfreq *df) |
66 | { | |
67 | return ERR_PTR(-EINVAL); | |
68 | } | |
69 | ||
3c99c2ce | 70 | static inline struct thermal_cooling_device * |
a76caf55 ØE |
71 | devfreq_cooling_register(struct devfreq *df) |
72 | { | |
73 | return ERR_PTR(-EINVAL); | |
74 | } | |
75 | ||
84e0d87c LL |
76 | static inline struct thermal_cooling_device * |
77 | devfreq_cooling_em_register(struct devfreq *df, | |
78 | struct devfreq_cooling_power *dfc_power) | |
79 | { | |
80 | return ERR_PTR(-EINVAL); | |
81 | } | |
82 | ||
a76caf55 | 83 | static inline void |
3c99c2ce | 84 | devfreq_cooling_unregister(struct thermal_cooling_device *dfc) |
a76caf55 ØE |
85 | { |
86 | } | |
87 | ||
88 | #endif /* CONFIG_DEVFREQ_THERMAL */ | |
89 | #endif /* __DEVFREQ_COOLING_H__ */ |