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e1ccb2c3 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
8946034a SG |
2 | /* |
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 | ||
e1ccb2c3 | 13 | /* Bit 0 express polarity */ |
8946034a SG |
14 | #define GPIO_ACTIVE_HIGH 0 |
15 | #define GPIO_ACTIVE_LOW 1 | |
16 | ||
e1ccb2c3 MV |
17 | /* 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 | ||
1bb257a9 PD |
36 | /* Bit 4 express pull up */ |
37 | #define GPIO_PULL_UP 16 | |
38 | ||
39 | /* Bit 5 express pull down */ | |
40 | #define GPIO_PULL_DOWN 32 | |
41 | ||
8946034a | 42 | #endif |