1. 根目录:
2. include
3. dt-bindings
4. pinctrl
5. am43xx.h

/*
 * This header provides constants specific to AM43XX pinctrl bindings.
 */

#ifndef _DT_BINDINGS_PINCTRL_AM43XX_H
#define _DT_BINDINGS_PINCTRL_AM43XX_H

#define MUX_MODE0	0
#define MUX_MODE1	1
#define MUX_MODE2	2
#define MUX_MODE3	3
#define MUX_MODE4	4
#define MUX_MODE5	5
#define MUX_MODE6	6
#define MUX_MODE7	7
#define MUX_MODE8	8

#define PULL_DISABLE		(1 << 16)
#define PULL_UP			(1 << 17)
#define INPUT_EN		(1 << 18)
#define SLEWCTRL_SLOW		(1 << 19)
#define SLEWCTRL_FAST		0
#define DS0_PULL_UP_DOWN_EN	(1 << 27)

#define PIN_OUTPUT		(PULL_DISABLE)
#define PIN_OUTPUT_PULLUP	(PULL_UP)
#define PIN_OUTPUT_PULLDOWN	0
#define PIN_INPUT		(INPUT_EN | PULL_DISABLE)
#define PIN_INPUT_PULLUP	(INPUT_EN | PULL_UP)
#define PIN_INPUT_PULLDOWN	(INPUT_EN)

#endif