include/linux/regulator/driver.h

   1 /*
   2  * driver.h -- SoC Regulator driver support.
   3  *
   4  * Copyright (C) 2007, 2008 Wolfson Microelectronics PLC.
   5  *
   6  * Author: Liam Girdwood <lg@opensource.wolfsonmicro.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  *
  12  * Regulator Driver Interface.
  13  */
  14
  15 #ifndef __LINUX_REGULATOR_DRIVER_H_
  16 #define __LINUX_REGULATOR_DRIVER_H_
  17
  18 #include <linux/device.h>
  19 #include <linux/regulator/consumer.h>
  20
  21 struct regulator_dev;
  22 struct regulator_init_data;
  23
  24 /**
  25  * struct regulator_ops - regulator operations.
  26  *
  27  * This struct describes regulator operations which can be implemented by
  28  * regulator chip drivers.
  29  *
  30  * @enable: Enable the regulator.
  31  * @disable: Disable the regulator.
  32  * @is_enabled: Return 1 if the regulator is enabled, 0 otherwise.
  33  *
  34  * @set_voltage: Set the voltage for the regulator within the range specified.
  35  *               The driver should select the voltage closest to min_uV.
  36  * @get_voltage: Return the currently configured voltage for the regulator.
  37  *
  38  * @set_current_limit: Configure a limit for a current-limited regulator.
  39  * @get_current_limit: Get the limit for a current-limited regulator.
  40  *
  41  * @set_mode: Set the operating mode for the regulator.
  42  * @get_mode: Get the current operating mode for the regulator.
  43  * @get_optimum_mode: Get the most efficient operating mode for the regulator
  44  *                    when running with the specified parameters.
  45  *
  46  * @set_suspend_voltage: Set the voltage for the regulator when the system
  47  *                       is suspended.
  48  * @set_suspend_enable: Mark the regulator as enabled when the system is
  49  *                      suspended.
  50  * @set_suspend_disable: Mark the regulator as disabled when the system is
  51  *                       suspended.
  52  * @set_suspend_mode: Set the operating mode for the regulator when the
  53  *                    system is suspended.
  54  */
  55 struct regulator_ops {
  56
  57         /* get/set regulator voltage */
  58         int (*set_voltage) (struct regulator_dev *, int min_uV, int max_uV);
  59         int (*get_voltage) (struct regulator_dev *);
  60
  61         /* get/set regulator current  */
  62         int (*set_current_limit) (struct regulator_dev *,
  63                                  int min_uA, int max_uA);
  64         int (*get_current_limit) (struct regulator_dev *);
  65
  66         /* enable/disable regulator */
  67         int (*enable) (struct regulator_dev *);
  68         int (*disable) (struct regulator_dev *);
  69         int (*is_enabled) (struct regulator_dev *);
  70
  71         /* get/set regulator operating mode (defined in regulator.h) */
  72         int (*set_mode) (struct regulator_dev *, unsigned int mode);
  73         unsigned int (*get_mode) (struct regulator_dev *);
  74
  75         /* get most efficient regulator operating mode for load */
  76         unsigned int (*get_optimum_mode) (struct regulator_dev *, int input_uV,
  77                                           int output_uV, int load_uA);
  78
  79         /* the operations below are for configuration of regulator state when
  80          * its parent PMIC enters a global STANDBY/HIBERNATE state */
  81
  82         /* set regulator suspend voltage */
  83         int (*set_suspend_voltage) (struct regulator_dev *, int uV);
  84
  85         /* enable/disable regulator in suspend state */
  86         int (*set_suspend_enable) (struct regulator_dev *);
  87         int (*set_suspend_disable) (struct regulator_dev *);
  88
  89         /* set regulator suspend operating mode (defined in regulator.h) */
  90         int (*set_suspend_mode) (struct regulator_dev *, unsigned int mode);
  91 };
  92
  93 /*
  94  * Regulators can either control voltage or current.
  95  */
  96 enum regulator_type {
  97         REGULATOR_VOLTAGE,
  98         REGULATOR_CURRENT,
  99 };
 100
 101 /**
 102  * struct regulator_desc - Regulator descriptor
 103  *
 104  * Each regulator registered with the core is described with a structure of
 105  * this type.
 106  *
 107  * @name: Identifying name for the regulator.
 108  * @id: Numerical identifier for the regulator.
 109  * @ops: Regulator operations table.
 110  * @irq: Interrupt number for the regulator.
 111  * @type: Indicates if the regulator is a voltage or current regulator.
 112  * @owner: Module providing the regulator, used for refcounting.
 113  */
 114 struct regulator_desc {
 115         const char *name;
 116         int id;
 117         struct regulator_ops *ops;
 118         int irq;
 119         enum regulator_type type;
 120         struct module *owner;
 121 };
 122
 123 struct regulator_dev *regulator_register(struct regulator_desc *regulator_desc,
 124         struct device *dev, void *driver_data);
 125 void regulator_unregister(struct regulator_dev *rdev);
 126
 127 int regulator_notifier_call_chain(struct regulator_dev *rdev,
 128                                   unsigned long event, void *data);
 129
 130 void *rdev_get_drvdata(struct regulator_dev *rdev);
 131 struct device *rdev_get_dev(struct regulator_dev *rdev);
 132 int rdev_get_id(struct regulator_dev *rdev);
 133
 134 void *regulator_get_init_drvdata(struct regulator_init_data *reg_init_data);
 135
 136 #endif