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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 name of this GPIO chip
* @label: a functional name for this GPIO chip
* @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_KERNEL (1UL << 0)
#define GPIOLINE_FLAG_IS_OUT (1UL << 1)
#define GPIOLINE_FLAG_ACTIVE_LOW (1UL << 2)
#define GPIOLINE_FLAG_OPEN_DRAIN (1UL << 3)
#define GPIOLINE_FLAG_OPEN_SOURCE (1UL << 4)
/**
* struct gpioline_info - Information about a certain GPIO line
* @line_offset: the local offset on this GPIO device, fill in when
* requesting information from the kernel
* @flags: various flags for this line
* @name: the name of this GPIO line
* @label: a functional name for this GPIO line
* @kernel: this GPIO is in use by the kernel
* @out: this GPIO is an output line (false means it is an input)
* @active_low: this GPIO is active low
*/
struct gpioline_info {
__u32 line_offset;
__u32 flags;
char name[32];
char label[32];
};
#define GPIO_GET_CHIPINFO_IOCTL _IOR('o', 0x01, struct gpiochip_info)
#define GPIO_GET_LINEINFO_IOCTL _IOWR('o', 0x02, struct gpioline_info)
#endif /* _UAPI_GPIO_H_ */
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