[deliverable/linux.git] / 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
Commit	Line	Data
71fab21f SW	1	/*
	2	* This header provides constants for most GPIO bindings.
	3	*
	4	* Most GPIO bindings include a flags cell as part of the GPIO specifier.
	5	* In most cases, the format of the flags cell uses the standard values
	6	* defined in this header.
	7	*/
	8
	9	#ifndef _DT_BINDINGS_GPIO_GPIO_H
	10	#define _DT_BINDINGS_GPIO_GPIO_H
	11
69d301fd	12	/* Bit 0 express polarity */
71fab21f SW	13	#define GPIO_ACTIVE_HIGH 0
	14	#define GPIO_ACTIVE_LOW 1
	15
69d301fd LW	16	/* Bit 1 express single-endedness */
	17	#define GPIO_PUSH_PULL 0
	18	#define GPIO_SINGLE_ENDED 2
	19
	20	/*
	21	* Open Drain/Collector is the combination of single-ended active low,
	22	* Open Source/Emitter is the combination of single-ended active high.
	23	*/
	24	#define GPIO_OPEN_DRAIN (GPIO_SINGLE_ENDED \| GPIO_ACTIVE_LOW)
	25	#define GPIO_OPEN_SOURCE (GPIO_SINGLE_ENDED \| GPIO_ACTIVE_HIGH)
	26
71fab21f	27	#endif