Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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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/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);
37unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev);
38unsigned long dev_pm_opp_get_max_transition_latency(struct device *dev);
39struct dev_pm_opp *dev_pm_opp_get_suspend_opp(struct device *dev);
40
41struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev,
42 unsigned long freq,
43 bool available);
44
45struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
46 unsigned long *freq);
47
48struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev,
49 unsigned long *freq);
50
51int dev_pm_opp_add(struct device *dev, unsigned long freq,
52 unsigned long u_volt);
53void dev_pm_opp_remove(struct device *dev, unsigned long freq);
54
55int dev_pm_opp_enable(struct device *dev, unsigned long freq);
56
57int dev_pm_opp_disable(struct device *dev, unsigned long freq);
58
59struct srcu_notifier_head *dev_pm_opp_get_notifier(struct device *dev);
60int dev_pm_opp_set_supported_hw(struct device *dev, const u32 *versions,
61 unsigned int count);
62void dev_pm_opp_put_supported_hw(struct device *dev);
63int dev_pm_opp_set_prop_name(struct device *dev, const char *name);
64void dev_pm_opp_put_prop_name(struct device *dev);
65int dev_pm_opp_set_regulator(struct device *dev, const char *name);
66void dev_pm_opp_put_regulator(struct device *dev);
67int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq);
68#else
69static inline unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp)
70{
71 return 0;
72}
73
74static inline unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp)
75{
76 return 0;
77}
78
79static inline bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp)
80{
81 return false;
82}
83
84static inline int dev_pm_opp_get_opp_count(struct device *dev)
85{
86 return 0;
87}
88
89static inline unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev)
90{
91 return 0;
92}
93
94static inline unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev)
95{
96 return 0;
97}
98
99static inline unsigned long dev_pm_opp_get_max_transition_latency(struct device *dev)
100{
101 return 0;
102}
103
104static inline struct dev_pm_opp *dev_pm_opp_get_suspend_opp(struct device *dev)
105{
106 return NULL;
107}
108
109static inline struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev,
110 unsigned long freq, bool available)
111{
112 return ERR_PTR(-EINVAL);
113}
114
115static inline struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
116 unsigned long *freq)
117{
118 return ERR_PTR(-EINVAL);
119}
120
121static inline struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev,
122 unsigned long *freq)
123{
124 return ERR_PTR(-EINVAL);
125}
126
127static inline int dev_pm_opp_add(struct device *dev, unsigned long freq,
128 unsigned long u_volt)
129{
130 return -EINVAL;
131}
132
133static inline void dev_pm_opp_remove(struct device *dev, unsigned long freq)
134{
135}
136
137static inline int dev_pm_opp_enable(struct device *dev, unsigned long freq)
138{
139 return 0;
140}
141
142static inline int dev_pm_opp_disable(struct device *dev, unsigned long freq)
143{
144 return 0;
145}
146
147static inline struct srcu_notifier_head *dev_pm_opp_get_notifier(
148 struct device *dev)
149{
150 return ERR_PTR(-EINVAL);
151}
152
153static inline int dev_pm_opp_set_supported_hw(struct device *dev,
154 const u32 *versions,
155 unsigned int count)
156{
157 return -EINVAL;
158}
159
160static inline void dev_pm_opp_put_supported_hw(struct device *dev) {}
161
162static inline int dev_pm_opp_set_prop_name(struct device *dev, const char *name)
163{
164 return -EINVAL;
165}
166
167static inline void dev_pm_opp_put_prop_name(struct device *dev) {}
168
169static inline int dev_pm_opp_set_regulator(struct device *dev, const char *name)
170{
171 return -EINVAL;
172}
173
174static inline void dev_pm_opp_put_regulator(struct device *dev) {}
175
176static inline int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq)
177{
178 return -EINVAL;
179}
180
181#endif /* CONFIG_PM_OPP */
182
183#if defined(CONFIG_PM_OPP) && defined(CONFIG_OF)
184int dev_pm_opp_of_add_table(struct device *dev);
185void dev_pm_opp_of_remove_table(struct device *dev);
186int dev_pm_opp_of_cpumask_add_table(cpumask_var_t cpumask);
187void dev_pm_opp_of_cpumask_remove_table(cpumask_var_t cpumask);
188int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, cpumask_var_t cpumask);
189int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, cpumask_var_t cpumask);
190#else
191static inline int dev_pm_opp_of_add_table(struct device *dev)
192{
193 return -EINVAL;
194}
195
196static inline void dev_pm_opp_of_remove_table(struct device *dev)
197{
198}
199
200static inline int dev_pm_opp_of_cpumask_add_table(cpumask_var_t cpumask)
201{
202 return -ENOSYS;
203}
204
205static inline void dev_pm_opp_of_cpumask_remove_table(cpumask_var_t cpumask)
206{
207}
208
209static inline int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, cpumask_var_t cpumask)
210{
211 return -ENOSYS;
212}
213
214static inline int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, cpumask_var_t cpumask)
215{
216 return -ENOSYS;
217}
218#endif
219
220#endif /* __LINUX_OPP_H__ */