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 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 142 static inline int dev_pm_opp_of_add_table(struct device *dev) 143 { 144 return -EINVAL; 145 } 146 147 static inline void dev_pm_opp_of_remove_table(struct device *dev) 148 { 149 } 150 151 static inline int dev_pm_opp_of_cpumask_add_table(cpumask_var_t cpumask) 152 { 153 return -ENOSYS; 154 } 155 156 static inline void dev_pm_opp_of_cpumask_remove_table(cpumask_var_t cpumask) 157 { 158 } 159 160 static inline int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, cpumask_var_t cpumask) 161 { 162 return -ENOSYS; 163 } 164 165 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