[mirror_ubuntu-bionic-kernel.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

/* 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 persistence */
#define GPIO_SLEEP_MAINTAIN_VALUE 0
#define GPIO_SLEEP_MAY_LOOSE_VALUE 8

#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
4c0facdd LD	20	/* Bit 2 express Open drain or open source */
	21	#define GPIO_LINE_OPEN_SOURCE 0
	22	#define GPIO_LINE_OPEN_DRAIN 4
	23
69d301fd	24	/*
4c0facdd LD	25	* Open Drain/Collector is the combination of single-ended open drain interface.
4c0facdd LD	26	* Open Source/Emitter is the combination of single-ended open source interface.
69d301fd	27	*/
4c0facdd LD	28	#define GPIO_OPEN_DRAIN (GPIO_SINGLE_ENDED \| GPIO_LINE_OPEN_DRAIN)
4c0facdd LD	29	#define GPIO_OPEN_SOURCE (GPIO_SINGLE_ENDED \| GPIO_LINE_OPEN_SOURCE)
69d301fd	30
05f479bf CK	31	/* Bit 3 express GPIO suspend/resume persistence */
	32	#define GPIO_SLEEP_MAINTAIN_VALUE 0
	33	#define GPIO_SLEEP_MAY_LOOSE_VALUE 8
	34
71fab21f	35	#endif