2 * <linux/gpio.h> - userspace ABI for the GPIO character devices
4 * Copyright (C) 2015 Linus Walleij
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 as published by
8 * the Free Software Foundation.
13 #include <linux/ioctl.h>
14 #include <linux/types.h>
17 * struct gpiochip_info - Information about a certain GPIO chip
18 * @name: the name of this GPIO chip
19 * @label: a functional name for this GPIO chip
20 * @lines: number of GPIO lines on this chip
22 struct gpiochip_info {
28 /* Line is in use by the kernel */
29 #define GPIOLINE_FLAG_KERNEL (1UL << 0)
30 #define GPIOLINE_FLAG_IS_OUT (1UL << 1)
31 #define GPIOLINE_FLAG_ACTIVE_LOW (1UL << 2)
32 #define GPIOLINE_FLAG_OPEN_DRAIN (1UL << 3)
33 #define GPIOLINE_FLAG_OPEN_SOURCE (1UL << 4)
36 * struct gpioline_info - Information about a certain GPIO line
37 * @line_offset: the local offset on this GPIO device, fill in when
38 * requesting information from the kernel
39 * @flags: various flags for this line
40 * @name: the name of this GPIO line
41 * @label: a functional name for this GPIO line
42 * @kernel: this GPIO is in use by the kernel
43 * @out: this GPIO is an output line (false means it is an input)
44 * @active_low: this GPIO is active low
46 struct gpioline_info {
53 #define GPIO_GET_CHIPINFO_IOCTL _IOR('o', 0x01, struct gpiochip_info)
54 #define GPIO_GET_LINEINFO_IOCTL _IOWR('o', 0x02, struct gpioline_info)
56 #endif /* _UAPI_GPIO_H_ */