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/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);
68int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, const struct cpumask *cpumask);
69int dev_pm_opp_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask);
70void dev_pm_opp_remove_table(struct device *dev);
71void dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask);
72#else
73static inline unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp)
74{
75 return 0;
76}
77
78static inline unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp)
79{
80 return 0;
81}
82
83static inline bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp)
84{
85 return false;
86}
87
88static inline int dev_pm_opp_get_opp_count(struct device *dev)
89{
90 return 0;
91}
92
93static inline unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev)
94{
95 return 0;
96}
97
98static inline unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev)
99{
100 return 0;
101}
102
103static inline unsigned long dev_pm_opp_get_max_transition_latency(struct device *dev)
104{
105 return 0;
106}
107
108static inline struct dev_pm_opp *dev_pm_opp_get_suspend_opp(struct device *dev)
109{
110 return NULL;
111}
112
113static inline struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev,
114 unsigned long freq, bool available)
115{
116 return ERR_PTR(-ENOTSUPP);
117}
118
119static inline struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
120 unsigned long *freq)
121{
122 return ERR_PTR(-ENOTSUPP);
123}
124
125static inline struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev,
126 unsigned long *freq)
127{
128 return ERR_PTR(-ENOTSUPP);
129}
130
131static inline int dev_pm_opp_add(struct device *dev, unsigned long freq,
132 unsigned long u_volt)
133{
134 return -ENOTSUPP;
135}
136
137static inline void dev_pm_opp_remove(struct device *dev, unsigned long freq)
138{
139}
140
141static inline int dev_pm_opp_enable(struct device *dev, unsigned long freq)
142{
143 return 0;
144}
145
146static inline int dev_pm_opp_disable(struct device *dev, unsigned long freq)
147{
148 return 0;
149}
150
151static inline struct srcu_notifier_head *dev_pm_opp_get_notifier(
152 struct device *dev)
153{
154 return ERR_PTR(-ENOTSUPP);
155}
156
157static inline int dev_pm_opp_set_supported_hw(struct device *dev,
158 const u32 *versions,
159 unsigned int count)
160{
161 return -ENOTSUPP;
162}
163
164static inline void dev_pm_opp_put_supported_hw(struct device *dev) {}
165
166static inline int dev_pm_opp_set_prop_name(struct device *dev, const char *name)
167{
168 return -ENOTSUPP;
169}
170
171static inline void dev_pm_opp_put_prop_name(struct device *dev) {}
172
173static inline int dev_pm_opp_set_regulator(struct device *dev, const char *name)
174{
175 return -ENOTSUPP;
176}
177
178static inline void dev_pm_opp_put_regulator(struct device *dev) {}
179
180static inline int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq)
181{
182 return -ENOTSUPP;
183}
184
185static inline int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, const struct cpumask *cpumask)
186{
187 return -ENOTSUPP;
188}
189
190static inline int dev_pm_opp_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask)
191{
192 return -EINVAL;
193}
194
195static inline void dev_pm_opp_remove_table(struct device *dev)
196{
197}
198
199static inline void dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask)
200{
201}
202
203#endif /* CONFIG_PM_OPP */
204
205#if defined(CONFIG_PM_OPP) && defined(CONFIG_OF)
206int dev_pm_opp_of_add_table(struct device *dev);
207void dev_pm_opp_of_remove_table(struct device *dev);
208int dev_pm_opp_of_cpumask_add_table(const struct cpumask *cpumask);
209void dev_pm_opp_of_cpumask_remove_table(const struct cpumask *cpumask);
210int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask);
211#else
212static inline int dev_pm_opp_of_add_table(struct device *dev)
213{
214 return -ENOTSUPP;
215}
216
217static inline void dev_pm_opp_of_remove_table(struct device *dev)
218{
219}
220
221static inline int dev_pm_opp_of_cpumask_add_table(const struct cpumask *cpumask)
222{
223 return -ENOTSUPP;
224}
225
226static inline void dev_pm_opp_of_cpumask_remove_table(const struct cpumask *cpumask)
227{
228}
229
230static inline int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask)
231{
232 return -ENOTSUPP;
233}
234#endif
235
236#endif /* __LINUX_OPP_H__ */