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3f0292ae HS |
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 | struct regulator_init_data; | |
25 | ||
26 | enum regulator_type; | |
27 | ||
28 | /** | |
29 | * struct gpio_regulator_state - state description | |
30 | * @value: microvolts or microamps | |
31 | * @gpios: bitfield of gpio target-states for the value | |
32 | * | |
33 | * This structure describes a supported setting of the regulator | |
34 | * and the necessary gpio-state to achieve it. | |
35 | * | |
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. | |
38 | */ | |
39 | struct gpio_regulator_state { | |
40 | int value; | |
41 | int gpios; | |
42 | }; | |
43 | ||
44 | /** | |
45 | * struct gpio_regulator_config - config structure | |
46 | * @supply_name: Name of the regulator supply | |
47 | * @enable_gpio: GPIO to use for enable control | |
48 | * set to -EINVAL if not used | |
49 | * @enable_high: Polarity of enable GPIO | |
50 | * 1 = Active high, 0 = Active low | |
51 | * @enabled_at_boot: Whether regulator has been enabled at | |
52 | * boot or not. 1 = Yes, 0 = No | |
53 | * This is used to keep the regulator at | |
54 | * the default state | |
55 | * @startup_delay: Start-up time in microseconds | |
56 | * @gpios: Array containing the gpios needed to control | |
57 | * the setting of the regulator | |
58 | * @nr_gpios: Number of gpios | |
59 | * @states: Array of gpio_regulator_state entries describing | |
60 | * the gpio state for specific voltages | |
61 | * @nr_states: Number of states available | |
62 | * @regulator_type: either REGULATOR_CURRENT or REGULATOR_VOLTAGE | |
63 | * @init_data: regulator_init_data | |
64 | * | |
65 | * This structure contains gpio-voltage regulator configuration | |
66 | * information that must be passed by platform code to the | |
67 | * gpio-voltage regulator driver. | |
68 | */ | |
69 | struct gpio_regulator_config { | |
70 | const char *supply_name; | |
71 | ||
72 | int enable_gpio; | |
73 | unsigned enable_high:1; | |
74 | unsigned enabled_at_boot:1; | |
75 | unsigned startup_delay; | |
76 | ||
77 | struct gpio *gpios; | |
78 | int nr_gpios; | |
79 | ||
80 | struct gpio_regulator_state *states; | |
81 | int nr_states; | |
82 | ||
83 | enum regulator_type type; | |
84 | struct regulator_init_data *init_data; | |
85 | }; | |
86 | ||
87 | #endif |