| | 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__ */ |
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