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 #else
  69 static inline unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp)
  70 {
  71         return 0;
  72 }
  73
  74 static inline unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp)
  75 {
  76         return 0;
  77 }
  78
  79 static inline bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp)
  80 {
  81         return false;
  82 }
  83
  84 static inline int dev_pm_opp_get_opp_count(struct device *dev)
  85 {
  86         return 0;
  87 }
  88
  89 static inline unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev)
  90 {
  91         return 0;
  92 }
  93
  94 static inline unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev)
  95 {
  96         return 0;
  97 }
  98
  99 static inline unsigned long dev_pm_opp_get_max_transition_latency(struct device *dev)
 100 {
 101         return 0;
 102 }
 103
 104 static inline struct dev_pm_opp *dev_pm_opp_get_suspend_opp(struct device *dev)
 105 {
 106         return NULL;
 107 }
 108
 109 static inline struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev,
 110                                         unsigned long freq, bool available)
 111 {
 112         return ERR_PTR(-EINVAL);
 113 }
 114
 115 static inline struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
 116                                         unsigned long *freq)
 117 {
 118         return ERR_PTR(-EINVAL);
 119 }
 120
 121 static inline struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev,
 122                                         unsigned long *freq)
 123 {
 124         return ERR_PTR(-EINVAL);
 125 }
 126
 127 static inline int dev_pm_opp_add(struct device *dev, unsigned long freq,
 128                                         unsigned long u_volt)
 129 {
 130         return -EINVAL;
 131 }
 132
 133 static inline void dev_pm_opp_remove(struct device *dev, unsigned long freq)
 134 {
 135 }
 136
 137 static inline int dev_pm_opp_enable(struct device *dev, unsigned long freq)
 138 {
 139         return 0;
 140 }
 141
 142 static inline int dev_pm_opp_disable(struct device *dev, unsigned long freq)
 143 {
 144         return 0;
 145 }
 146
 147 static inline struct srcu_notifier_head *dev_pm_opp_get_notifier(
 148                                                         struct device *dev)
 149 {
 150         return ERR_PTR(-EINVAL);
 151 }
 152
 153 static inline int dev_pm_opp_set_supported_hw(struct device *dev,
 154                                               const u32 *versions,
 155                                               unsigned int count)
 156 {
 157         return -EINVAL;
 158 }
 159
 160 static inline void dev_pm_opp_put_supported_hw(struct device *dev) {}
 161
 162 static inline int dev_pm_opp_set_prop_name(struct device *dev, const char *name)
 163 {
 164         return -EINVAL;
 165 }
 166
 167 static inline void dev_pm_opp_put_prop_name(struct device *dev) {}
 168
 169 static inline int dev_pm_opp_set_regulator(struct device *dev, const char *name)
 170 {
 171         return -EINVAL;
 172 }
 173
 174 static inline void dev_pm_opp_put_regulator(struct device *dev) {}
 175
 176 static inline int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq)
 177 {
 178         return -EINVAL;
 179 }
 180
 181 #endif          /* CONFIG_PM_OPP */
 182
 183 #if defined(CONFIG_PM_OPP) && defined(CONFIG_OF)
 184 int dev_pm_opp_of_add_table(struct device *dev);
 185 void dev_pm_opp_of_remove_table(struct device *dev);
 186 int dev_pm_opp_of_cpumask_add_table(cpumask_var_t cpumask);
 187 void dev_pm_opp_of_cpumask_remove_table(cpumask_var_t cpumask);
 188 int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, cpumask_var_t cpumask);
 189 int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, cpumask_var_t cpumask);
 190 #else
 191 static inline int dev_pm_opp_of_add_table(struct device *dev)
 192 {
 193         return -EINVAL;
 194 }
 195
 196 static inline void dev_pm_opp_of_remove_table(struct device *dev)
 197 {
 198 }
 199
 200 static inline int dev_pm_opp_of_cpumask_add_table(cpumask_var_t cpumask)
 201 {
 202         return -ENOSYS;
 203 }
 204
 205 static inline void dev_pm_opp_of_cpumask_remove_table(cpumask_var_t cpumask)
 206 {
 207 }
 208
 209 static inline int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, cpumask_var_t cpumask)
 210 {
 211         return -ENOSYS;
 212 }
 213
 214 static inline int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, cpumask_var_t cpumask)
 215 {
 216         return -ENOSYS;
 217 }
 218 #endif
 219
 220 #endif          /* __LINUX_OPP_H__ */