include/linux/regulator/gpio-regulator.h

   1 /*
   2  * gpio-regulator.h
   3  *
   4  * Copyright 2011 Heiko Stuebner <heiko@sntech.de>
   5  *
   6  * based on fixed.h
   7  *
   8  * Copyright 2008 Wolfson Microelectronics PLC.
   9  *
  10  * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
  11  *
  12  * Copyright (c) 2009 Nokia Corporation
  13  * Roger Quadros <ext-roger.quadros@nokia.com>
  14  *
  15  * This program is free software; you can redistribute it and/or
  16  * modify it under the terms of the GNU General Public License as
  17  * published by the Free Software Foundation; either version 2 of the
  18  * License, or (at your option) any later version.
  19  */
  20
  21 #ifndef __REGULATOR_GPIO_H
  22 #define __REGULATOR_GPIO_H
  23
  24 #include <linux/gpio/consumer.h>
  25
  26 struct regulator_init_data;
  27
  28 enum regulator_type;
  29
  30 /**
  31  * struct gpio_regulator_state - state description
  32  * @value:              microvolts or microamps
  33  * @gpios:              bitfield of gpio target-states for the value
  34  *
  35  * This structure describes a supported setting of the regulator
  36  * and the necessary gpio-state to achieve it.
  37  *
  38  * The n-th bit in the bitfield describes the state of the n-th GPIO
  39  * from the gpios-array defined in gpio_regulator_config below.
  40  */
  41 struct gpio_regulator_state {
  42         int value;
  43         int gpios;
  44 };
  45
  46 /**
  47  * struct gpio_regulator_config - config structure
  48  * @supply_name:        Name of the regulator supply
  49  * @enabled_at_boot:    Whether regulator has been enabled at
  50  *                      boot or not. 1 = Yes, 0 = No
  51  *                      This is used to keep the regulator at
  52  *                      the default state
  53  * @startup_delay:      Start-up time in microseconds
  54  * @gflags:             Array of GPIO configuration flags for initial
  55  *                      states
  56  * @ngpios:             Number of GPIOs and configurations available
  57  * @states:             Array of gpio_regulator_state entries describing
  58  *                      the gpio state for specific voltages
  59  * @nr_states:          Number of states available
  60  * @regulator_type:     either REGULATOR_CURRENT or REGULATOR_VOLTAGE
  61  * @init_data:          regulator_init_data
  62  *
  63  * This structure contains gpio-voltage regulator configuration
  64  * information that must be passed by platform code to the
  65  * gpio-voltage regulator driver.
  66  */
  67 struct gpio_regulator_config {
  68         const char *supply_name;
  69
  70         unsigned enabled_at_boot:1;
  71         unsigned startup_delay;
  72
  73         enum gpiod_flags *gflags;
  74         int ngpios;
  75
  76         struct gpio_regulator_state *states;
  77         int nr_states;
  78
  79         enum regulator_type type;
  80         struct regulator_init_data *init_data;
  81 };
  82
  83 #endif