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/notifier.h>
19
20struct dev_pm_opp;
21struct device;
22
23enum dev_pm_opp_event {
24	OPP_EVENT_ADD, OPP_EVENT_REMOVE, OPP_EVENT_ENABLE, OPP_EVENT_DISABLE,
25};
26
27#if defined(CONFIG_PM_OPP)
28
29unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp);
30
31unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp);
32
33bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp);
34
35int dev_pm_opp_get_opp_count(struct device *dev);
36unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev);
37struct dev_pm_opp *dev_pm_opp_get_suspend_opp(struct device *dev);
38
39struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev,
40					      unsigned long freq,
41					      bool available);
42
43struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
44					      unsigned long *freq);
45
46struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev,
47					     unsigned long *freq);
48
49int dev_pm_opp_add(struct device *dev, unsigned long freq,
50		   unsigned long u_volt);
51void dev_pm_opp_remove(struct device *dev, unsigned long freq);
52
53int dev_pm_opp_enable(struct device *dev, unsigned long freq);
54
55int dev_pm_opp_disable(struct device *dev, unsigned long freq);
56
57struct srcu_notifier_head *dev_pm_opp_get_notifier(struct device *dev);
58#else
59static inline unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp)
60{
61	return 0;
62}
63
64static inline unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp)
65{
66	return 0;
67}
68
69static inline bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp)
70{
71	return false;
72}
73
74static inline int dev_pm_opp_get_opp_count(struct device *dev)
75{
76	return 0;
77}
78
79static inline unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev)
80{
81	return 0;
82}
83
84static inline struct dev_pm_opp *dev_pm_opp_get_suspend_opp(struct device *dev)
85{
86	return NULL;
87}
88
89static inline struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev,
90					unsigned long freq, bool available)
91{
92	return ERR_PTR(-EINVAL);
93}
94
95static inline struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
96					unsigned long *freq)
97{
98	return ERR_PTR(-EINVAL);
99}
100
101static inline struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev,
102					unsigned long *freq)
103{
104	return ERR_PTR(-EINVAL);
105}
106
107static inline int dev_pm_opp_add(struct device *dev, unsigned long freq,
108					unsigned long u_volt)
109{
110	return -EINVAL;
111}
112
113static inline void dev_pm_opp_remove(struct device *dev, unsigned long freq)
114{
115}
116
117static inline int dev_pm_opp_enable(struct device *dev, unsigned long freq)
118{
119	return 0;
120}
121
122static inline int dev_pm_opp_disable(struct device *dev, unsigned long freq)
123{
124	return 0;
125}
126
127static inline struct srcu_notifier_head *dev_pm_opp_get_notifier(
128							struct device *dev)
129{
130	return ERR_PTR(-EINVAL);
131}
132#endif		/* CONFIG_PM_OPP */
133
134#if defined(CONFIG_PM_OPP) && defined(CONFIG_OF)
135int dev_pm_opp_of_add_table(struct device *dev);
136void dev_pm_opp_of_remove_table(struct device *dev);
137int dev_pm_opp_of_cpumask_add_table(cpumask_var_t cpumask);
138void dev_pm_opp_of_cpumask_remove_table(cpumask_var_t cpumask);
139int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, cpumask_var_t cpumask);
140int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, cpumask_var_t cpumask);
141#else
142static inline int dev_pm_opp_of_add_table(struct device *dev)
143{
144	return -EINVAL;
145}
146
147static inline void dev_pm_opp_of_remove_table(struct device *dev)
148{
149}
150
151static inline int dev_pm_opp_of_cpumask_add_table(cpumask_var_t cpumask)
152{
153	return -ENOSYS;
154}
155
156static inline void dev_pm_opp_of_cpumask_remove_table(cpumask_var_t cpumask)
157{
158}
159
160static inline int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, cpumask_var_t cpumask)
161{
162	return -ENOSYS;
163}
164
165static inline int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, cpumask_var_t cpumask)
166{
167	return -ENOSYS;
168}
169#endif
170
171#endif		/* __LINUX_OPP_H__ */
172