summaryrefslogtreecommitdiffstats
path: root/include/linux/opp.h
blob: 87a9208f8aec24bafe60ba3206c2f1a4d904c626 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
/*
 * Generic OPP Interface
 *
 * Copyright (C) 2009-2010 Texas Instruments Incorporated.
 *	Nishanth Menon
 *	Romit Dasgupta
 *	Kevin Hilman
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#ifndef __LINUX_OPP_H__
#define __LINUX_OPP_H__

#include <linux/err.h>
#include <linux/cpufreq.h>
#include <linux/notifier.h>

struct opp;

enum opp_event {
	OPP_EVENT_ADD, OPP_EVENT_ENABLE, OPP_EVENT_DISABLE,
};

#if defined(CONFIG_PM_OPP)

unsigned long opp_get_voltage(struct opp *opp);

unsigned long opp_get_freq(struct opp *opp);

int opp_get_opp_count(struct device *dev);

struct opp *opp_find_freq_exact(struct device *dev, unsigned long freq,
				bool available);

struct opp *opp_find_freq_floor(struct device *dev, unsigned long *freq);

struct opp *opp_find_freq_ceil(struct device *dev, unsigned long *freq);

int opp_add(struct device *dev, unsigned long freq, unsigned long u_volt);

int opp_enable(struct device *dev, unsigned long freq);

int opp_disable(struct device *dev, unsigned long freq);

struct srcu_notifier_head *opp_get_notifier(struct device *dev);

#else
static inline unsigned long opp_get_voltage(struct opp *opp)
{
	return 0;
}

static inline unsigned long opp_get_freq(struct opp *opp)
{
	return 0;
}

static inline int opp_get_opp_count(struct device *dev)
{
	return 0;
}

static inline struct opp *opp_find_freq_exact(struct device *dev,
					unsigned long freq, bool available)
{
	return ERR_PTR(-EINVAL);
}

static inline struct opp *opp_find_freq_floor(struct device *dev,
					unsigned long *freq)
{
	return ERR_PTR(-EINVAL);
}

static inline struct opp *opp_find_freq_ceil(struct device *dev,
					unsigned long *freq)
{
	return ERR_PTR(-EINVAL);
}

static inline int opp_add(struct device *dev, unsigned long freq,
					unsigned long u_volt)
{
	return -EINVAL;
}

static inline int opp_enable(struct device *dev, unsigned long freq)
{
	return 0;
}

static inline int opp_disable(struct device *dev, unsigned long freq)
{
	return 0;
}

struct srcu_notifier_head *opp_get_notifier(struct device *dev)
{
	return ERR_PTR(-EINVAL);
}
#endif		/* CONFIG_PM */

#if defined(CONFIG_CPU_FREQ) && defined(CONFIG_PM_OPP)
int opp_init_cpufreq_table(struct device *dev,
			    struct cpufreq_frequency_table **table);
void opp_free_cpufreq_table(struct device *dev,
				struct cpufreq_frequency_table **table);
#else
static inline int opp_init_cpufreq_table(struct device *dev,
			    struct cpufreq_frequency_table **table)
{
	return -EINVAL;
}

static inline
void opp_free_cpufreq_table(struct device *dev,
				struct cpufreq_frequency_table **table)
{
}
#endif		/* CONFIG_CPU_FREQ */

#endif		/* __LINUX_OPP_H__ */
OpenPOWER on IntegriCloud