Linux kernel mirror (for testing)
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linux
1/*
2 * Generic OPP Interface
3 *
4 * Copyright (C) 2009-2010 Texas Instruments Incorporated.
5 * Nishanth Menon
6 * Romit Dasgupta
7 * Kevin Hilman
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14#ifndef __LINUX_OPP_H__
15#define __LINUX_OPP_H__
16
17#include <linux/err.h>
18#include <linux/cpufreq.h>
19
20struct opp;
21
22#if defined(CONFIG_PM_OPP)
23
24unsigned long opp_get_voltage(struct opp *opp);
25
26unsigned long opp_get_freq(struct opp *opp);
27
28int opp_get_opp_count(struct device *dev);
29
30struct opp *opp_find_freq_exact(struct device *dev, unsigned long freq,
31 bool available);
32
33struct opp *opp_find_freq_floor(struct device *dev, unsigned long *freq);
34
35struct opp *opp_find_freq_ceil(struct device *dev, unsigned long *freq);
36
37int opp_add(struct device *dev, unsigned long freq, unsigned long u_volt);
38
39int opp_enable(struct device *dev, unsigned long freq);
40
41int opp_disable(struct device *dev, unsigned long freq);
42
43#else
44static inline unsigned long opp_get_voltage(struct opp *opp)
45{
46 return 0;
47}
48
49static inline unsigned long opp_get_freq(struct opp *opp)
50{
51 return 0;
52}
53
54static inline int opp_get_opp_count(struct device *dev)
55{
56 return 0;
57}
58
59static inline struct opp *opp_find_freq_exact(struct device *dev,
60 unsigned long freq, bool available)
61{
62 return ERR_PTR(-EINVAL);
63}
64
65static inline struct opp *opp_find_freq_floor(struct device *dev,
66 unsigned long *freq)
67{
68 return ERR_PTR(-EINVAL);
69}
70
71static inline struct opp *opp_find_freq_ceil(struct device *dev,
72 unsigned long *freq)
73{
74 return ERR_PTR(-EINVAL);
75}
76
77static inline int opp_add(struct device *dev, unsigned long freq,
78 unsigned long u_volt)
79{
80 return -EINVAL;
81}
82
83static inline int opp_enable(struct device *dev, unsigned long freq)
84{
85 return 0;
86}
87
88static inline int opp_disable(struct device *dev, unsigned long freq)
89{
90 return 0;
91}
92#endif /* CONFIG_PM */
93
94#if defined(CONFIG_CPU_FREQ) && defined(CONFIG_PM_OPP)
95int opp_init_cpufreq_table(struct device *dev,
96 struct cpufreq_frequency_table **table);
97#else
98static inline int opp_init_cpufreq_table(struct device *dev,
99 struct cpufreq_frequency_table **table)
100{
101 return -EINVAL;
102}
103#endif /* CONFIG_CPU_FREQ */
104
105#endif /* __LINUX_OPP_H__ */