4 * Copyright 2011 Heiko Stuebner <heiko@sntech.de>
8 * Copyright 2008 Wolfson Microelectronics PLC.
10 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
12 * Copyright (c) 2009 Nokia Corporation
13 * Roger Quadros <ext-roger.quadros@nokia.com>
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.
21 #ifndef __REGULATOR_GPIO_H
22 #define __REGULATOR_GPIO_H
24 struct regulator_init_data;
29 * struct gpio_regulator_state - state description
30 * @value: microvolts or microamps
31 * @gpios: bitfield of gpio target-states for the value
33 * This structure describes a supported setting of the regulator
34 * and the necessary gpio-state to achieve it.
36 * The n-th bit in the bitfield describes the state of the n-th GPIO
37 * from the gpios-array defined in gpio_regulator_config below.
39 struct gpio_regulator_state {
45 * struct gpio_regulator_config - config structure
46 * @supply_name: Name of the regulator supply
47 * @enable_high: Polarity of enable GPIO
48 * 1 = Active high, 0 = Active low
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
53 * @startup_delay: Start-up time in microseconds
54 * @gpios: Array containing the gpios needed to control
55 * the setting of the regulator
56 * @nr_gpios: Number of gpios
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
63 * This structure contains gpio-voltage regulator configuration
64 * information that must be passed by platform code to the
65 * gpio-voltage regulator driver.
67 struct gpio_regulator_config {
68 const char *supply_name;
70 unsigned enable_high:1;
71 unsigned enabled_at_boot:1;
72 unsigned startup_delay;
77 struct gpio_regulator_state *states;
80 enum regulator_type type;
81 struct regulator_init_data *init_data;