drivers/regulator/internal.h

   1 /*
   2  * internal.h  --  Voltage/Current Regulator framework internal code
   3  *
   4  * Copyright 2007, 2008 Wolfson Microelectronics PLC.
   5  * Copyright 2008 SlimLogic Ltd.
   6  *
   7  * Author: Liam Girdwood <lrg@slimlogic.co.uk>
   8  *
   9  *  This program is free software; you can redistribute  it and/or modify it
  10  *  under  the terms of  the GNU General  Public License as published by the
  11  *  Free Software Foundation;  either version 2 of the  License, or (at your
  12  *  option) any later version.
  13  *
  14  */
  15
  16 #ifndef __REGULATOR_INTERNAL_H
  17 #define __REGULATOR_INTERNAL_H
  18
  19 #include <linux/suspend.h>
  20
  21 #define REGULATOR_STATES_NUM    (PM_SUSPEND_MAX + 1)
  22
  23 struct regulator_voltage {
  24         int min_uV;
  25         int max_uV;
  26 };
  27
  28 /*
  29  * struct regulator
  30  *
  31  * One for each consumer device.
  32  * @voltage - a voltage array for each state of runtime, i.e.:
  33  *            PM_SUSPEND_ON
  34  *            PM_SUSPEND_TO_IDLE
  35  *            PM_SUSPEND_STANDBY
  36  *            PM_SUSPEND_MEM
  37  *            PM_SUSPEND_MAX
  38  */
  39 struct regulator {
  40         struct device *dev;
  41         struct list_head list;
  42         unsigned int always_on:1;
  43         unsigned int bypass:1;
  44         int uA_load;
  45         unsigned int enable_count;
  46         unsigned int deferred_disables;
  47         struct regulator_voltage voltage[REGULATOR_STATES_NUM];
  48         const char *supply_name;
  49         struct device_attribute dev_attr;
  50         struct regulator_dev *rdev;
  51         struct dentry *debugfs;
  52 };
  53
  54 extern struct class regulator_class;
  55
  56 static inline struct regulator_dev *dev_to_rdev(struct device *dev)
  57 {
  58         return container_of(dev, struct regulator_dev, dev);
  59 }
  60
  61 #ifdef CONFIG_OF
  62 struct regulator_dev *of_find_regulator_by_node(struct device_node *np);
  63 struct regulator_init_data *regulator_of_get_init_data(struct device *dev,
  64                                  const struct regulator_desc *desc,
  65                                  struct regulator_config *config,
  66                                  struct device_node **node);
  67
  68 struct regulator_dev *of_parse_coupled_regulator(struct regulator_dev *rdev,
  69                                                  int index);
  70
  71 int of_get_n_coupled(struct regulator_dev *rdev);
  72
  73 bool of_check_coupling_data(struct regulator_dev *rdev);
  74
  75 #else
  76 static inline struct regulator_dev *
  77 of_find_regulator_by_node(struct device_node *np)
  78 {
  79         return NULL;
  80 }
  81
  82 static inline struct regulator_init_data *
  83 regulator_of_get_init_data(struct device *dev,
  84                            const struct regulator_desc *desc,
  85                            struct regulator_config *config,
  86                            struct device_node **node)
  87 {
  88         return NULL;
  89 }
  90
  91 static inline struct regulator_dev *
  92 of_parse_coupled_regulator(struct regulator_dev *rdev,
  93                            int index)
  94 {
  95         return NULL;
  96 }
  97
  98 static inline int of_get_n_coupled(struct regulator_dev *rdev)
  99 {
 100         return 0;
 101 }
 102
 103 static inline bool of_check_coupling_data(struct regulator_dev *rdev)
 104 {
 105         return false;
 106 }
 107
 108 #endif
 109 enum regulator_get_type {
 110         NORMAL_GET,
 111         EXCLUSIVE_GET,
 112         OPTIONAL_GET,
 113         MAX_GET_TYPE
 114 };
 115
 116 struct regulator *_regulator_get(struct device *dev, const char *id,
 117                                  enum regulator_get_type get_type);
 118 #endif