Release 4.7 include/dt-bindings/gpio/gpio.h

/*
 * 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

/*
 * Open Drain/Collector is the combination of single-ended active low,
 * Open Source/Emitter is the combination of single-ended active high.
 */

#define GPIO_OPEN_DRAIN (GPIO_SINGLE_ENDED | GPIO_ACTIVE_LOW)

#define GPIO_OPEN_SOURCE (GPIO_SINGLE_ENDED | GPIO_ACTIVE_HIGH)

#endif
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stephen warren
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Directory: include/dt-bindings/gpio

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