46 lines · c
1/* SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) */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 values7 * defined in this header.8 */9 10#ifndef _DT_BINDINGS_GPIO_GPIO_H11#define _DT_BINDINGS_GPIO_GPIO_H12 13/* Bit 0 express polarity */14#define GPIO_ACTIVE_HIGH 015#define GPIO_ACTIVE_LOW 116 17/* Bit 1 express single-endedness */18#define GPIO_PUSH_PULL 019#define GPIO_SINGLE_ENDED 220 21/* Bit 2 express Open drain or open source */22#define GPIO_LINE_OPEN_SOURCE 023#define GPIO_LINE_OPEN_DRAIN 424 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 034#define GPIO_TRANSITORY 835 36/* Bit 4 express pull up */37#define GPIO_PULL_UP 1638 39/* Bit 5 express pull down */40#define GPIO_PULL_DOWN 3241 42/* Bit 6 express pull disable */43#define GPIO_PULL_DISABLE 6444 45#endif46