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* <linux/gpio.h> - userspace ABI for the GPIO character devices
* Copyright (C) 2015 Linus Walleij
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
#ifndef _UAPI_GPIO_H_
#define _UAPI_GPIO_H_
#include <linux/ioctl.h>
#include <linux/types.h>
* struct gpiochip_info - Information about a certain GPIO chip
* @name: the Linux kernel name of this GPIO chip
* @label: a functional name for this GPIO chip, such as a product
* number, may be NULL
* @lines: number of GPIO lines on this chip
struct gpiochip_info {
char name[32];
char label[32];
__u32 lines;
/* Line is in use by the kernel */
#define GPIOLINE_FLAG_IS_OUT (1UL << 1)
* struct gpioline_info - Information about a certain GPIO line
* @line_offset: the local offset on this GPIO device, fill this in when
* requesting the line information from the kernel
* @flags: various flags for this line
* @name: the name of this GPIO line, such as the output pin of the line on the
* chip, a rail or a pin header name on a board, as specified by the gpio
* chip, may be NULL
* @consumer: a functional name for the consumer of this GPIO line as set by
* whatever is using it, will be NULL if there is no current user but may
* also be NULL if the consumer doesn't set this up
struct gpioline_info {
__u32 line_offset;
__u32 flags;
char name[32];
char consumer[32];
#define GPIO_GET_CHIPINFO_IOCTL _IOR(0xB4, 0x01, struct gpiochip_info)
#define GPIO_GET_LINEINFO_IOCTL _IOWR(0xB4, 0x02, struct gpioline_info)
#endif /* _UAPI_GPIO_H_ */