Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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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#include <linux/notifier.h>
20
21struct opp;
22struct device;
23
24enum opp_event {
25 OPP_EVENT_ADD, OPP_EVENT_ENABLE, OPP_EVENT_DISABLE,
26};
27
28#if defined(CONFIG_PM_OPP)
29
30unsigned long opp_get_voltage(struct opp *opp);
31
32unsigned long opp_get_freq(struct opp *opp);
33
34int opp_get_opp_count(struct device *dev);
35
36struct opp *opp_find_freq_exact(struct device *dev, unsigned long freq,
37 bool available);
38
39struct opp *opp_find_freq_floor(struct device *dev, unsigned long *freq);
40
41struct opp *opp_find_freq_ceil(struct device *dev, unsigned long *freq);
42
43int opp_add(struct device *dev, unsigned long freq, unsigned long u_volt);
44
45int opp_enable(struct device *dev, unsigned long freq);
46
47int opp_disable(struct device *dev, unsigned long freq);
48
49struct srcu_notifier_head *opp_get_notifier(struct device *dev);
50#else
51static inline unsigned long opp_get_voltage(struct opp *opp)
52{
53 return 0;
54}
55
56static inline unsigned long opp_get_freq(struct opp *opp)
57{
58 return 0;
59}
60
61static inline int opp_get_opp_count(struct device *dev)
62{
63 return 0;
64}
65
66static inline struct opp *opp_find_freq_exact(struct device *dev,
67 unsigned long freq, bool available)
68{
69 return ERR_PTR(-EINVAL);
70}
71
72static inline struct opp *opp_find_freq_floor(struct device *dev,
73 unsigned long *freq)
74{
75 return ERR_PTR(-EINVAL);
76}
77
78static inline struct opp *opp_find_freq_ceil(struct device *dev,
79 unsigned long *freq)
80{
81 return ERR_PTR(-EINVAL);
82}
83
84static inline int opp_add(struct device *dev, unsigned long freq,
85 unsigned long u_volt)
86{
87 return -EINVAL;
88}
89
90static inline int opp_enable(struct device *dev, unsigned long freq)
91{
92 return 0;
93}
94
95static inline int opp_disable(struct device *dev, unsigned long freq)
96{
97 return 0;
98}
99
100static inline struct srcu_notifier_head *opp_get_notifier(struct device *dev)
101{
102 return ERR_PTR(-EINVAL);
103}
104#endif /* CONFIG_PM_OPP */
105
106#if defined(CONFIG_PM_OPP) && defined(CONFIG_OF)
107int of_init_opp_table(struct device *dev);
108#else
109static inline int of_init_opp_table(struct device *dev)
110{
111 return -EINVAL;
112}
113#endif
114
115#if defined(CONFIG_CPU_FREQ) && defined(CONFIG_PM_OPP)
116int opp_init_cpufreq_table(struct device *dev,
117 struct cpufreq_frequency_table **table);
118void opp_free_cpufreq_table(struct device *dev,
119 struct cpufreq_frequency_table **table);
120#else
121static inline int opp_init_cpufreq_table(struct device *dev,
122 struct cpufreq_frequency_table **table)
123{
124 return -EINVAL;
125}
126
127static inline
128void opp_free_cpufreq_table(struct device *dev,
129 struct cpufreq_frequency_table **table)
130{
131}
132#endif /* CONFIG_CPU_FREQ */
133
134#endif /* __LINUX_OPP_H__ */