| /* |
| * <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 _GPIO_H_ |
| #define _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_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 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 /* _GPIO_H_ */ |
