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         struct regulator_voltage voltage[REGULATOR_STATES_NUM];
  46         const char *supply_name;
  47         struct device_attribute dev_attr;
  48         struct regulator_dev *rdev;
  49         struct dentry *debugfs;
  50 };
  51
  52 extern struct class regulator_class;
  53
  54 static inline struct regulator_dev *dev_to_rdev(struct device *dev)
  55 {
  56         return container_of(dev, struct regulator_dev, dev);
  57 }
  58
  59 #ifdef CONFIG_OF
  60 struct regulator_dev *of_find_regulator_by_node(struct device_node *np);
  61 struct regulator_init_data *regulator_of_get_init_data(struct device *dev,
  62                                  const struct regulator_desc *desc,
  63                                  struct regulator_config *config,
  64                                  struct device_node **node);
  65
  66 struct regulator_dev *of_parse_coupled_regulator(struct regulator_dev *rdev,
  67                                                  int index);
  68
  69 int of_get_n_coupled(struct regulator_dev *rdev);
  70
  71 bool of_check_coupling_data(struct regulator_dev *rdev);
  72
  73 #else
  74 static inline struct regulator_dev *
  75 of_find_regulator_by_node(struct device_node *np)
  76 {
  77         return NULL;
  78 }
  79
  80 static inline struct regulator_init_data *
  81 regulator_of_get_init_data(struct device *dev,
  82                            const struct regulator_desc *desc,
  83                            struct regulator_config *config,
  84                            struct device_node **node)
  85 {
  86         return NULL;
  87 }
  88
  89 static inline struct regulator_dev *
  90 of_parse_coupled_regulator(struct regulator_dev *rdev,
  91                            int index)
  92 {
  93         return NULL;
  94 }
  95
  96 static inline int of_get_n_coupled(struct regulator_dev *rdev)
  97 {
  98         return 0;
  99 }
 100
 101 static inline bool of_check_coupling_data(struct regulator_dev *rdev)
 102 {
 103         return false;
 104 }
 105
 106 #endif
 107 enum regulator_get_type {
 108         NORMAL_GET,
 109         EXCLUSIVE_GET,
 110         OPTIONAL_GET,
 111         MAX_GET_TYPE
 112 };
 113
 114 struct regulator *_regulator_get(struct device *dev, const char *id,
 115                                  enum regulator_get_type get_type);
 116 #endif