Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
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
51#else
52static inline unsigned long opp_get_voltage(struct opp *opp)
53{
54 return 0;
55}
56
57static inline unsigned long opp_get_freq(struct opp *opp)
58{
59 return 0;
60}
61
62static inline int opp_get_opp_count(struct device *dev)
63{
64 return 0;
65}
66
67static inline struct opp *opp_find_freq_exact(struct device *dev,
68 unsigned long freq, bool available)
69{
70 return ERR_PTR(-EINVAL);
71}
72
73static inline struct opp *opp_find_freq_floor(struct device *dev,
74 unsigned long *freq)
75{
76 return ERR_PTR(-EINVAL);
77}
78
79static inline struct opp *opp_find_freq_ceil(struct device *dev,
80 unsigned long *freq)
81{
82 return ERR_PTR(-EINVAL);
83}
84
85static inline int opp_add(struct device *dev, unsigned long freq,
86 unsigned long u_volt)
87{
88 return -EINVAL;
89}
90
91static inline int opp_enable(struct device *dev, unsigned long freq)
92{
93 return 0;
94}
95
96static inline int opp_disable(struct device *dev, unsigned long freq)
97{
98 return 0;
99}
100
101static inline struct srcu_notifier_head *opp_get_notifier(struct device *dev)
102{
103 return ERR_PTR(-EINVAL);
104}
105#endif /* CONFIG_PM_OPP */
106
107#if defined(CONFIG_CPU_FREQ) && defined(CONFIG_PM_OPP)
108int opp_init_cpufreq_table(struct device *dev,
109 struct cpufreq_frequency_table **table);
110void opp_free_cpufreq_table(struct device *dev,
111 struct cpufreq_frequency_table **table);
112#else
113static inline int opp_init_cpufreq_table(struct device *dev,
114 struct cpufreq_frequency_table **table)
115{
116 return -EINVAL;
117}
118
119static inline
120void opp_free_cpufreq_table(struct device *dev,
121 struct cpufreq_frequency_table **table)
122{
123}
124#endif /* CONFIG_CPU_FREQ */
125
126#endif /* __LINUX_OPP_H__ */