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Marek Vasute1ccb2c2018-06-14 13:32:10 +02001/* SPDX-License-Identifier: GPL-2.0 */
Simon Glass89460342014-06-11 23:29:52 -06002/*
3 * This header provides constants for most GPIO bindings.
4 *
5 * Most GPIO bindings include a flags cell as part of the GPIO specifier.
6 * In most cases, the format of the flags cell uses the standard values
7 * defined in this header.
8 */
9
10#ifndef _DT_BINDINGS_GPIO_GPIO_H
11#define _DT_BINDINGS_GPIO_GPIO_H
12
Marek Vasute1ccb2c2018-06-14 13:32:10 +020013/* Bit 0 express polarity */
Simon Glass89460342014-06-11 23:29:52 -060014#define GPIO_ACTIVE_HIGH 0
15#define GPIO_ACTIVE_LOW 1
16
Marek Vasute1ccb2c2018-06-14 13:32:10 +020017/* Bit 1 express single-endedness */
18#define GPIO_PUSH_PULL 0
19#define GPIO_SINGLE_ENDED 2
20
21/* Bit 2 express Open drain or open source */
22#define GPIO_LINE_OPEN_SOURCE 0
23#define GPIO_LINE_OPEN_DRAIN 4
24
25/*
26 * Open Drain/Collector is the combination of single-ended open drain interface.
27 * Open Source/Emitter is the combination of single-ended open source interface.
28 */
29#define GPIO_OPEN_DRAIN (GPIO_SINGLE_ENDED | GPIO_LINE_OPEN_DRAIN)
30#define GPIO_OPEN_SOURCE (GPIO_SINGLE_ENDED | GPIO_LINE_OPEN_SOURCE)
31
32/* Bit 3 express GPIO suspend/resume and reset persistence */
33#define GPIO_PERSISTENT 0
34#define GPIO_TRANSITORY 8
35
Simon Glass89460342014-06-11 23:29:52 -060036#endif