1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  * gpio-regulator.h
4  *
5  * Copyright 2011 Heiko Stuebner <heiko@sntech.de>
6  *
7  * based on fixed.h
8  *
9  * Copyright 2008 Wolfson Microelectronics PLC.
10  *
11  * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
12  *
13  * Copyright (c) 2009 Nokia Corporation
14  * Roger Quadros <ext-roger.quadros@nokia.com>
15  */
16 
17 #ifndef __REGULATOR_GPIO_H
18 #define __REGULATOR_GPIO_H
19 
20 #include <linux/gpio/consumer.h>
21 
22 struct regulator_init_data;
23 
24 enum regulator_type;
25 
26 /**
27  * struct gpio_regulator_state - state description
28  * @value:		microvolts or microamps
29  * @gpios:		bitfield of gpio target-states for the value
30  *
31  * This structure describes a supported setting of the regulator
32  * and the necessary gpio-state to achieve it.
33  *
34  * The n-th bit in the bitfield describes the state of the n-th GPIO
35  * from the gpios-array defined in gpio_regulator_config below.
36  */
37 struct gpio_regulator_state {
38 	int value;
39 	int gpios;
40 };
41 
42 /**
43  * struct gpio_regulator_config - config structure
44  * @supply_name:	Name of the regulator supply
45  * @input_supply:	Name of the input regulator supply
46  * @enabled_at_boot:	Whether regulator has been enabled at
47  *			boot or not. 1 = Yes, 0 = No
48  *			This is used to keep the regulator at
49  *			the default state
50  * @startup_delay:	Start-up time in microseconds
51  * @gflags:		Array of GPIO configuration flags for initial
52  *			states
53  * @ngpios:		Number of GPIOs and configurations available
54  * @states:		Array of gpio_regulator_state entries describing
55  *			the gpio state for specific voltages
56  * @nr_states:		Number of states available
57  * @regulator_type:	either REGULATOR_CURRENT or REGULATOR_VOLTAGE
58  * @init_data:		regulator_init_data
59  *
60  * This structure contains gpio-voltage regulator configuration
61  * information that must be passed by platform code to the
62  * gpio-voltage regulator driver.
63  */
64 struct gpio_regulator_config {
65 	const char *supply_name;
66 	const char *input_supply;
67 
68 	unsigned enabled_at_boot:1;
69 	unsigned startup_delay;
70 
71 	enum gpiod_flags *gflags;
72 	int ngpios;
73 
74 	struct gpio_regulator_state *states;
75 	int nr_states;
76 
77 	enum regulator_type type;
78 	struct regulator_init_data *init_data;
79 };
80 
81 #endif
82