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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 | |
59 | static inline unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp) | |
60 | { | |
61 | return 0; | |
62 | } | |
63 | ||
64 | static inline unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp) | |
65 | { | |
66 | return 0; | |
67 | } | |
68 | ||
69 | static inline bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp) | |
70 | { | |
71 | return false; | |
72 | } | |
73 | ||
74 | static inline int dev_pm_opp_get_opp_count(struct device *dev) | |
75 | { | |
76 | return 0; | |
77 | } | |
78 | ||
79 | static inline unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev) | |
80 | { | |
81 | return 0; | |
82 | } | |
83 | ||
84 | static inline struct dev_pm_opp *dev_pm_opp_get_suspend_opp(struct device *dev) | |
85 | { | |
86 | return NULL; | |
87 | } | |
88 | ||
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 | ||
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 | ||
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 | ||
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 | ||
113 | static inline void dev_pm_opp_remove(struct device *dev, unsigned long freq) | |
114 | { | |
115 | } | |
116 | ||
117 | static inline int dev_pm_opp_enable(struct device *dev, unsigned long freq) | |
118 | { | |
119 | return 0; | |
120 | } | |
121 | ||
122 | static inline int dev_pm_opp_disable(struct device *dev, unsigned long freq) | |
123 | { | |
124 | return 0; | |
125 | } | |
126 | ||
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 of_init_opp_table(struct device *dev); | |
136 | void of_free_opp_table(struct device *dev); | |
137 | int of_cpumask_init_opp_table(cpumask_var_t cpumask); | |
138 | void of_cpumask_free_opp_table(cpumask_var_t cpumask); | |
139 | int of_get_cpus_sharing_opps(struct device *cpu_dev, cpumask_var_t cpumask); | |
140 | int set_cpus_sharing_opps(struct device *cpu_dev, cpumask_var_t cpumask); | |
141 | #else | |
142 | static inline int of_init_opp_table(struct device *dev) | |
143 | { | |
144 | return -EINVAL; | |
145 | } | |
146 | ||
147 | static inline void of_free_opp_table(struct device *dev) | |
148 | { | |
149 | } | |
150 | ||
151 | static inline int of_cpumask_init_opp_table(cpumask_var_t cpumask) | |
152 | { | |
153 | return -ENOSYS; | |
154 | } | |
155 | ||
156 | static inline void of_cpumask_free_opp_table(cpumask_var_t cpumask) | |
157 | { | |
158 | } | |
159 | ||
160 | static inline int of_get_cpus_sharing_opps(struct device *cpu_dev, cpumask_var_t cpumask) | |
161 | { | |
162 | return -ENOSYS; | |
163 | } | |
164 | ||
165 | static inline int set_cpus_sharing_opps(struct device *cpu_dev, cpumask_var_t cpumask) | |
166 | { | |
167 | return -ENOSYS; | |
168 | } | |
169 | #endif | |
170 | ||
171 | #endif /* __LINUX_OPP_H__ */ |