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 clk;
  21 struct regulator;
  22 struct dev_pm_opp;
  23 struct device;
  24 struct opp_table;
  25
  26 enum dev_pm_opp_event {
  27         OPP_EVENT_ADD, OPP_EVENT_REMOVE, OPP_EVENT_ENABLE, OPP_EVENT_DISABLE,
  28 };
  29
  30 /**
  31  * struct dev_pm_opp_supply - Power supply voltage/current values
  32  * @u_volt:     Target voltage in microvolts corresponding to this OPP
  33  * @u_volt_min: Minimum voltage in microvolts corresponding to this OPP
  34  * @u_volt_max: Maximum voltage in microvolts corresponding to this OPP
  35  * @u_amp:      Maximum current drawn by the device in microamperes
  36  *
  37  * This structure stores the voltage/current values for a single power supply.
  38  */
  39 struct dev_pm_opp_supply {
  40         unsigned long u_volt;
  41         unsigned long u_volt_min;
  42         unsigned long u_volt_max;
  43         unsigned long u_amp;
  44 };
  45
  46 /**
  47  * struct dev_pm_opp_info - OPP freq/voltage/current values
  48  * @rate:       Target clk rate in hz
  49  * @supplies:   Array of voltage/current values for all power supplies
  50  *
  51  * This structure stores the freq/voltage/current values for a single OPP.
  52  */
  53 struct dev_pm_opp_info {
  54         unsigned long rate;
  55         struct dev_pm_opp_supply *supplies;
  56 };
  57
  58 /**
  59  * struct dev_pm_set_opp_data - Set OPP data
  60  * @old_opp:    Old OPP info
  61  * @new_opp:    New OPP info
  62  * @regulators: Array of regulator pointers
  63  * @regulator_count: Number of regulators
  64  * @clk:        Pointer to clk
  65  * @dev:        Pointer to the struct device
  66  *
  67  * This structure contains all information required for setting an OPP.
  68  */
  69 struct dev_pm_set_opp_data {
  70         struct dev_pm_opp_info old_opp;
  71         struct dev_pm_opp_info new_opp;
  72
  73         struct regulator **regulators;
  74         unsigned int regulator_count;
  75         struct clk *clk;
  76         struct device *dev;
  77 };
  78
  79 #if defined(CONFIG_PM_OPP)
  80
  81 struct opp_table *dev_pm_opp_get_opp_table(struct device *dev);
  82 struct opp_table *dev_pm_opp_get_opp_table_indexed(struct device *dev, int index);
  83 void dev_pm_opp_put_opp_table(struct opp_table *opp_table);
  84
  85 unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp);
  86
  87 unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp);
  88
  89 unsigned int dev_pm_opp_get_level(struct dev_pm_opp *opp);
  90
  91 bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp);
  92
  93 int dev_pm_opp_get_opp_count(struct device *dev);
  94 unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev);
  95 unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev);
  96 unsigned long dev_pm_opp_get_max_transition_latency(struct device *dev);
  97 unsigned long dev_pm_opp_get_suspend_opp_freq(struct device *dev);
  98
  99 struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev,
 100                                               unsigned long freq,
 101                                               bool available);
 102
 103 struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
 104                                               unsigned long *freq);
 105
 106 struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev,
 107                                              unsigned long *freq);
 108 void dev_pm_opp_put(struct dev_pm_opp *opp);
 109
 110 int dev_pm_opp_add(struct device *dev, unsigned long freq,
 111                    unsigned long u_volt);
 112 void dev_pm_opp_remove(struct device *dev, unsigned long freq);
 113 void dev_pm_opp_remove_all_dynamic(struct device *dev);
 114
 115 int dev_pm_opp_enable(struct device *dev, unsigned long freq);
 116
 117 int dev_pm_opp_disable(struct device *dev, unsigned long freq);
 118
 119 int dev_pm_opp_register_notifier(struct device *dev, struct notifier_block *nb);
 120 int dev_pm_opp_unregister_notifier(struct device *dev, struct notifier_block *nb);
 121
 122 struct opp_table *dev_pm_opp_set_supported_hw(struct device *dev, const u32 *versions, unsigned int count);
 123 void dev_pm_opp_put_supported_hw(struct opp_table *opp_table);
 124 struct opp_table *dev_pm_opp_set_prop_name(struct device *dev, const char *name);
 125 void dev_pm_opp_put_prop_name(struct opp_table *opp_table);
 126 struct opp_table *dev_pm_opp_set_regulators(struct device *dev, const char * const names[], unsigned int count);
 127 void dev_pm_opp_put_regulators(struct opp_table *opp_table);
 128 struct opp_table *dev_pm_opp_set_clkname(struct device *dev, const char * name);
 129 void dev_pm_opp_put_clkname(struct opp_table *opp_table);
 130 struct opp_table *dev_pm_opp_register_set_opp_helper(struct device *dev, int (*set_opp)(struct dev_pm_set_opp_data *data));
 131 void dev_pm_opp_unregister_set_opp_helper(struct opp_table *opp_table);
 132 struct opp_table *dev_pm_opp_set_genpd_virt_dev(struct device *dev, struct device *virt_dev, int index);
 133 void dev_pm_opp_put_genpd_virt_dev(struct opp_table *opp_table, struct device *virt_dev);
 134 int dev_pm_opp_xlate_performance_state(struct opp_table *src_table, struct opp_table *dst_table, unsigned int pstate);
 135 int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq);
 136 int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, const struct cpumask *cpumask);
 137 int dev_pm_opp_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask);
 138 void dev_pm_opp_remove_table(struct device *dev);
 139 void dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask);
 140 #else
 141 static inline struct opp_table *dev_pm_opp_get_opp_table(struct device *dev)
 142 {
 143         return ERR_PTR(-ENOTSUPP);
 144 }
 145
 146 static inline struct opp_table *dev_pm_opp_get_opp_table_indexed(struct device *dev, int index)
 147 {
 148         return ERR_PTR(-ENOTSUPP);
 149 }
 150
 151 static inline void dev_pm_opp_put_opp_table(struct opp_table *opp_table) {}
 152
 153 static inline unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp)
 154 {
 155         return 0;
 156 }
 157
 158 static inline unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp)
 159 {
 160         return 0;
 161 }
 162
 163 static inline unsigned int dev_pm_opp_get_level(struct dev_pm_opp *opp)
 164 {
 165         return 0;
 166 }
 167
 168 static inline bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp)
 169 {
 170         return false;
 171 }
 172
 173 static inline int dev_pm_opp_get_opp_count(struct device *dev)
 174 {
 175         return 0;
 176 }
 177
 178 static inline unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev)
 179 {
 180         return 0;
 181 }
 182
 183 static inline unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev)
 184 {
 185         return 0;
 186 }
 187
 188 static inline unsigned long dev_pm_opp_get_max_transition_latency(struct device *dev)
 189 {
 190         return 0;
 191 }
 192
 193 static inline unsigned long dev_pm_opp_get_suspend_opp_freq(struct device *dev)
 194 {
 195         return 0;
 196 }
 197
 198 static inline struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev,
 199                                         unsigned long freq, bool available)
 200 {
 201         return ERR_PTR(-ENOTSUPP);
 202 }
 203
 204 static inline struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
 205                                         unsigned long *freq)
 206 {
 207         return ERR_PTR(-ENOTSUPP);
 208 }
 209
 210 static inline struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev,
 211                                         unsigned long *freq)
 212 {
 213         return ERR_PTR(-ENOTSUPP);
 214 }
 215
 216 static inline void dev_pm_opp_put(struct dev_pm_opp *opp) {}
 217
 218 static inline int dev_pm_opp_add(struct device *dev, unsigned long freq,
 219                                         unsigned long u_volt)
 220 {
 221         return -ENOTSUPP;
 222 }
 223
 224 static inline void dev_pm_opp_remove(struct device *dev, unsigned long freq)
 225 {
 226 }
 227
 228 static inline void dev_pm_opp_remove_all_dynamic(struct device *dev)
 229 {
 230 }
 231
 232 static inline int dev_pm_opp_enable(struct device *dev, unsigned long freq)
 233 {
 234         return 0;
 235 }
 236
 237 static inline int dev_pm_opp_disable(struct device *dev, unsigned long freq)
 238 {
 239         return 0;
 240 }
 241
 242 static inline int dev_pm_opp_register_notifier(struct device *dev, struct notifier_block *nb)
 243 {
 244         return -ENOTSUPP;
 245 }
 246
 247 static inline int dev_pm_opp_unregister_notifier(struct device *dev, struct notifier_block *nb)
 248 {
 249         return -ENOTSUPP;
 250 }
 251
 252 static inline struct opp_table *dev_pm_opp_set_supported_hw(struct device *dev,
 253                                                             const u32 *versions,
 254                                                             unsigned int count)
 255 {
 256         return ERR_PTR(-ENOTSUPP);
 257 }
 258
 259 static inline void dev_pm_opp_put_supported_hw(struct opp_table *opp_table) {}
 260
 261 static inline struct opp_table *dev_pm_opp_register_set_opp_helper(struct device *dev,
 262                         int (*set_opp)(struct dev_pm_set_opp_data *data))
 263 {
 264         return ERR_PTR(-ENOTSUPP);
 265 }
 266
 267 static inline void dev_pm_opp_unregister_set_opp_helper(struct opp_table *opp_table) {}
 268
 269 static inline struct opp_table *dev_pm_opp_set_prop_name(struct device *dev, const char *name)
 270 {
 271         return ERR_PTR(-ENOTSUPP);
 272 }
 273
 274 static inline void dev_pm_opp_put_prop_name(struct opp_table *opp_table) {}
 275
 276 static inline struct opp_table *dev_pm_opp_set_regulators(struct device *dev, const char * const names[], unsigned int count)
 277 {
 278         return ERR_PTR(-ENOTSUPP);
 279 }
 280
 281 static inline void dev_pm_opp_put_regulators(struct opp_table *opp_table) {}
 282
 283 static inline struct opp_table *dev_pm_opp_set_clkname(struct device *dev, const char * name)
 284 {
 285         return ERR_PTR(-ENOTSUPP);
 286 }
 287
 288 static inline void dev_pm_opp_put_clkname(struct opp_table *opp_table) {}
 289
 290 static inline struct opp_table *dev_pm_opp_set_genpd_virt_dev(struct device *dev, struct device *virt_dev, int index)
 291 {
 292         return ERR_PTR(-ENOTSUPP);
 293 }
 294
 295 static inline void dev_pm_opp_put_genpd_virt_dev(struct opp_table *opp_table, struct device *virt_dev) {}
 296
 297 static inline int dev_pm_opp_xlate_performance_state(struct opp_table *src_table, struct opp_table *dst_table, unsigned int pstate)
 298 {
 299         return -ENOTSUPP;
 300 }
 301
 302 static inline int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq)
 303 {
 304         return -ENOTSUPP;
 305 }
 306
 307 static inline int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, const struct cpumask *cpumask)
 308 {
 309         return -ENOTSUPP;
 310 }
 311
 312 static inline int dev_pm_opp_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask)
 313 {
 314         return -EINVAL;
 315 }
 316
 317 static inline void dev_pm_opp_remove_table(struct device *dev)
 318 {
 319 }
 320
 321 static inline void dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask)
 322 {
 323 }
 324
 325 #endif          /* CONFIG_PM_OPP */
 326
 327 #if defined(CONFIG_PM_OPP) && defined(CONFIG_OF)
 328 int dev_pm_opp_of_add_table(struct device *dev);
 329 int dev_pm_opp_of_add_table_indexed(struct device *dev, int index);
 330 void dev_pm_opp_of_remove_table(struct device *dev);
 331 int dev_pm_opp_of_cpumask_add_table(const struct cpumask *cpumask);
 332 void dev_pm_opp_of_cpumask_remove_table(const struct cpumask *cpumask);
 333 int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask);
 334 struct device_node *dev_pm_opp_of_get_opp_desc_node(struct device *dev);
 335 struct device_node *dev_pm_opp_get_of_node(struct dev_pm_opp *opp);
 336 int of_get_required_opp_performance_state(struct device_node *np, int index);
 337 void dev_pm_opp_of_register_em(struct cpumask *cpus);
 338 #else
 339 static inline int dev_pm_opp_of_add_table(struct device *dev)
 340 {
 341         return -ENOTSUPP;
 342 }
 343
 344 static inline int dev_pm_opp_of_add_table_indexed(struct device *dev, int index)
 345 {
 346         return -ENOTSUPP;
 347 }
 348
 349 static inline void dev_pm_opp_of_remove_table(struct device *dev)
 350 {
 351 }
 352
 353 static inline int dev_pm_opp_of_cpumask_add_table(const struct cpumask *cpumask)
 354 {
 355         return -ENOTSUPP;
 356 }
 357
 358 static inline void dev_pm_opp_of_cpumask_remove_table(const struct cpumask *cpumask)
 359 {
 360 }
 361
 362 static inline int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask)
 363 {
 364         return -ENOTSUPP;
 365 }
 366
 367 static inline struct device_node *dev_pm_opp_of_get_opp_desc_node(struct device *dev)
 368 {
 369         return NULL;
 370 }
 371
 372 static inline struct device_node *dev_pm_opp_get_of_node(struct dev_pm_opp *opp)
 373 {
 374         return NULL;
 375 }
 376
 377 static inline void dev_pm_opp_of_register_em(struct cpumask *cpus)
 378 {
 379 }
 380
 381 static inline int of_get_required_opp_performance_state(struct device_node *np, int index)
 382 {
 383         return -ENOTSUPP;
 384 }
 385 #endif
 386
 387 #endif          /* __LINUX_OPP_H__ */