include/linux/pm_opp.h

   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 unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev);
  38 unsigned long dev_pm_opp_get_max_transition_latency(struct device *dev);
  39 struct dev_pm_opp *dev_pm_opp_get_suspend_opp(struct device *dev);
  40
  41 struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev,
  42                                               unsigned long freq,
  43                                               bool available);
  44
  45 struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
  46                                               unsigned long *freq);
  47
  48 struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev,
  49                                              unsigned long *freq);
  50
  51 int dev_pm_opp_add(struct device *dev, unsigned long freq,
  52                    unsigned long u_volt);
  53 void dev_pm_opp_remove(struct device *dev, unsigned long freq);
  54
  55 int dev_pm_opp_enable(struct device *dev, unsigned long freq);
  56
  57 int dev_pm_opp_disable(struct device *dev, unsigned long freq);
  58
  59 struct srcu_notifier_head *dev_pm_opp_get_notifier(struct device *dev);
  60 int dev_pm_opp_set_supported_hw(struct device *dev, const u32 *versions,
  61                                 unsigned int count);
  62 void dev_pm_opp_put_supported_hw(struct device *dev);
  63 int dev_pm_opp_set_prop_name(struct device *dev, const char *name);
  64 void dev_pm_opp_put_prop_name(struct device *dev);
  65 int dev_pm_opp_set_regulator(struct device *dev, const char *name);
  66 void dev_pm_opp_put_regulator(struct device *dev);
  67 int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq);
  68 int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, const struct cpumask *cpumask);
  69 int dev_pm_opp_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask);
  70 void dev_pm_opp_remove_table(struct device *dev);
  71 void dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask);
  72 #else
  73 static inline unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp)
  74 {
  75         return 0;
  76 }
  77
  78 static inline unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp)
  79 {
  80         return 0;
  81 }
  82
  83 static inline bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp)
  84 {
  85         return false;
  86 }
  87
  88 static inline int dev_pm_opp_get_opp_count(struct device *dev)
  89 {
  90         return 0;
  91 }
  92
  93 static inline unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev)
  94 {
  95         return 0;
  96 }
  97
  98 static inline unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev)
  99 {
 100         return 0;
 101 }
 102
 103 static inline unsigned long dev_pm_opp_get_max_transition_latency(struct device *dev)
 104 {
 105         return 0;
 106 }
 107
 108 static inline struct dev_pm_opp *dev_pm_opp_get_suspend_opp(struct device *dev)
 109 {
 110         return NULL;
 111 }
 112
 113 static 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
 119 static 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
 125 static 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
 131 static inline int dev_pm_opp_add(struct device *dev, unsigned long freq,
 132                                         unsigned long u_volt)
 133 {
 134         return -ENOTSUPP;
 135 }
 136
 137 static inline void dev_pm_opp_remove(struct device *dev, unsigned long freq)
 138 {
 139 }
 140
 141 static inline int dev_pm_opp_enable(struct device *dev, unsigned long freq)
 142 {
 143         return 0;
 144 }
 145
 146 static inline int dev_pm_opp_disable(struct device *dev, unsigned long freq)
 147 {
 148         return 0;
 149 }
 150
 151 static inline struct srcu_notifier_head *dev_pm_opp_get_notifier(
 152                                                         struct device *dev)
 153 {
 154         return ERR_PTR(-ENOTSUPP);
 155 }
 156
 157 static 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
 164 static inline void dev_pm_opp_put_supported_hw(struct device *dev) {}
 165
 166 static inline int dev_pm_opp_set_prop_name(struct device *dev, const char *name)
 167 {
 168         return -ENOTSUPP;
 169 }
 170
 171 static inline void dev_pm_opp_put_prop_name(struct device *dev) {}
 172
 173 static inline int dev_pm_opp_set_regulator(struct device *dev, const char *name)
 174 {
 175         return -ENOTSUPP;
 176 }
 177
 178 static inline void dev_pm_opp_put_regulator(struct device *dev) {}
 179
 180 static inline int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq)
 181 {
 182         return -ENOTSUPP;
 183 }
 184
 185 static inline int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, const struct cpumask *cpumask)
 186 {
 187         return -ENOTSUPP;
 188 }
 189
 190 static inline int dev_pm_opp_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask)
 191 {
 192         return -EINVAL;
 193 }
 194
 195 static inline void dev_pm_opp_remove_table(struct device *dev)
 196 {
 197 }
 198
 199 static 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)
 206 int dev_pm_opp_of_add_table(struct device *dev);
 207 void dev_pm_opp_of_remove_table(struct device *dev);
 208 int dev_pm_opp_of_cpumask_add_table(const struct cpumask *cpumask);
 209 void dev_pm_opp_of_cpumask_remove_table(const struct cpumask *cpumask);
 210 int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask);
 211 #else
 212 static inline int dev_pm_opp_of_add_table(struct device *dev)
 213 {
 214         return -ENOTSUPP;
 215 }
 216
 217 static inline void dev_pm_opp_of_remove_table(struct device *dev)
 218 {
 219 }
 220
 221 static inline int dev_pm_opp_of_cpumask_add_table(const struct cpumask *cpumask)
 222 {
 223         return -ENOTSUPP;
 224 }
 225
 226 static inline void dev_pm_opp_of_cpumask_remove_table(const struct cpumask *cpumask)
 227 {
 228 }
 229
 230 static 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__ */