@ -1,3 +1,4 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* This header provides constants for most GPIO bindings .
*
@ -9,7 +10,27 @@
# ifndef _DT_BINDINGS_GPIO_GPIO_H
# define _DT_BINDINGS_GPIO_GPIO_H
/* Bit 0 express polarity */
# define GPIO_ACTIVE_HIGH 0
# define GPIO_ACTIVE_LOW 1
/* Bit 1 express single-endedness */
# define GPIO_PUSH_PULL 0
# define GPIO_SINGLE_ENDED 2
/* Bit 2 express Open drain or open source */
# define GPIO_LINE_OPEN_SOURCE 0
# define GPIO_LINE_OPEN_DRAIN 4
/*
* Open Drain / Collector is the combination of single - ended open drain interface .
* Open Source / Emitter is the combination of single - ended open source interface .
*/
# define GPIO_OPEN_DRAIN (GPIO_SINGLE_ENDED | GPIO_LINE_OPEN_DRAIN)
# define GPIO_OPEN_SOURCE (GPIO_SINGLE_ENDED | GPIO_LINE_OPEN_SOURCE)
/* Bit 3 express GPIO suspend/resume and reset persistence */
# define GPIO_PERSISTENT 0
# define GPIO_TRANSITORY 8
# endif