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/* SPDX-License-Identifier: GPL-2.0 */ /* * This header provides constants for most GPIO bindings. * * Most GPIO bindings include a flags cell as part of the GPIO specifier. * In most cases, the format of the flags cell uses the standard values * defined in this header. */ #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 /* Bit 4 express pull up */ #define GPIO_PULL_UP 16 /* Bit 5 express pull down */ #define GPIO_PULL_DOWN 32 #endif