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
20 struct dev_pm_opp;
21 struct device;
22
23 enum 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
29 unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp);
30
31 unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp);
32
33 bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp);
34
35 int dev_pm_opp_get_opp_count(struct device *dev);
36 unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev);
37 struct dev_pm_opp *dev_pm_opp_get_suspend_opp(struct device *dev);
38
39 struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev,
40 unsigned long freq,
41 bool available);
42
43 struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
44 unsigned long *freq);
45
46 struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev,
47 unsigned long *freq);
48
49 int dev_pm_opp_add(struct device *dev, unsigned long freq,
50 unsigned long u_volt);
51 void dev_pm_opp_remove(struct device *dev, unsigned long freq);
52
53 int dev_pm_opp_enable(struct device *dev, unsigned long freq);
54
55 int dev_pm_opp_disable(struct device *dev, unsigned long freq);
56
57 struct srcu_notifier_head *dev_pm_opp_get_notifier(struct device *dev);
58 #else
dev_pm_opp_get_voltage(struct dev_pm_opp * opp)59 static inline unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp)
60 {
61 return 0;
62 }
63
dev_pm_opp_get_freq(struct dev_pm_opp * opp)64 static inline unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp)
65 {
66 return 0;
67 }
68
dev_pm_opp_is_turbo(struct dev_pm_opp * opp)69 static inline bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp)
70 {
71 return false;
72 }
73
dev_pm_opp_get_opp_count(struct device * dev)74 static inline int dev_pm_opp_get_opp_count(struct device *dev)
75 {
76 return 0;
77 }
78
dev_pm_opp_get_max_clock_latency(struct device * dev)79 static inline unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev)
80 {
81 return 0;
82 }
83
dev_pm_opp_get_suspend_opp(struct device * dev)84 static inline struct dev_pm_opp *dev_pm_opp_get_suspend_opp(struct device *dev)
85 {
86 return NULL;
87 }
88
dev_pm_opp_find_freq_exact(struct device * dev,unsigned long freq,bool available)89 static 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
dev_pm_opp_find_freq_floor(struct device * dev,unsigned long * freq)95 static 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
dev_pm_opp_find_freq_ceil(struct device * dev,unsigned long * freq)101 static 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
dev_pm_opp_add(struct device * dev,unsigned long freq,unsigned long u_volt)107 static inline int dev_pm_opp_add(struct device *dev, unsigned long freq,
108 unsigned long u_volt)
109 {
110 return -EINVAL;
111 }
112
dev_pm_opp_remove(struct device * dev,unsigned long freq)113 static inline void dev_pm_opp_remove(struct device *dev, unsigned long freq)
114 {
115 }
116
dev_pm_opp_enable(struct device * dev,unsigned long freq)117 static inline int dev_pm_opp_enable(struct device *dev, unsigned long freq)
118 {
119 return 0;
120 }
121
dev_pm_opp_disable(struct device * dev,unsigned long freq)122 static inline int dev_pm_opp_disable(struct device *dev, unsigned long freq)
123 {
124 return 0;
125 }
126
dev_pm_opp_get_notifier(struct device * dev)127 static 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)
135 int dev_pm_opp_of_add_table(struct device *dev);
136 void dev_pm_opp_of_remove_table(struct device *dev);
137 int dev_pm_opp_of_cpumask_add_table(cpumask_var_t cpumask);
138 void dev_pm_opp_of_cpumask_remove_table(cpumask_var_t cpumask);
139 int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, cpumask_var_t cpumask);
140 int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, cpumask_var_t cpumask);
141 #else
dev_pm_opp_of_add_table(struct device * dev)142 static inline int dev_pm_opp_of_add_table(struct device *dev)
143 {
144 return -EINVAL;
145 }
146
dev_pm_opp_of_remove_table(struct device * dev)147 static inline void dev_pm_opp_of_remove_table(struct device *dev)
148 {
149 }
150
dev_pm_opp_of_cpumask_add_table(cpumask_var_t cpumask)151 static inline int dev_pm_opp_of_cpumask_add_table(cpumask_var_t cpumask)
152 {
153 return -ENOSYS;
154 }
155
dev_pm_opp_of_cpumask_remove_table(cpumask_var_t cpumask)156 static inline void dev_pm_opp_of_cpumask_remove_table(cpumask_var_t cpumask)
157 {
158 }
159
dev_pm_opp_of_get_sharing_cpus(struct device * cpu_dev,cpumask_var_t cpumask)160 static inline int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, cpumask_var_t cpumask)
161 {
162 return -ENOSYS;
163 }
164
dev_pm_opp_set_sharing_cpus(struct device * cpu_dev,cpumask_var_t cpumask)165 static 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