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fae9816446
The previous 'o' is in conflict and not very orderly assigned.
We want to select an ioctl() major that does not conflict with
the existining ones.
Add the new reserved major (0xB4) to Documentation/ioctl/ioctl-number.txt
Fixes: 3c702e9987 ("gpio: add a userspace chardev ABI for GPIOs")
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
59 lines
1.8 KiB
C
59 lines
1.8 KiB
C
/*
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* <linux/gpio.h> - userspace ABI for the GPIO character devices
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*
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* Copyright (C) 2015 Linus Walleij
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*/
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#ifndef _UAPI_GPIO_H_
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#define _UAPI_GPIO_H_
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#include <linux/ioctl.h>
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#include <linux/types.h>
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/**
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* struct gpiochip_info - Information about a certain GPIO chip
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* @name: the Linux kernel name of this GPIO chip
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* @label: a functional name for this GPIO chip, such as a product
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* number, may be NULL
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* @lines: number of GPIO lines on this chip
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*/
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struct gpiochip_info {
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char name[32];
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char label[32];
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__u32 lines;
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};
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/* Line is in use by the kernel */
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#define GPIOLINE_FLAG_KERNEL (1UL << 0)
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#define GPIOLINE_FLAG_IS_OUT (1UL << 1)
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#define GPIOLINE_FLAG_ACTIVE_LOW (1UL << 2)
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#define GPIOLINE_FLAG_OPEN_DRAIN (1UL << 3)
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#define GPIOLINE_FLAG_OPEN_SOURCE (1UL << 4)
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/**
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* struct gpioline_info - Information about a certain GPIO line
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* @line_offset: the local offset on this GPIO device, fill this in when
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* requesting the line information from the kernel
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* @flags: various flags for this line
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* @name: the name of this GPIO line, such as the output pin of the line on the
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* chip, a rail or a pin header name on a board, as specified by the gpio
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* chip, may be NULL
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* @consumer: a functional name for the consumer of this GPIO line as set by
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* whatever is using it, will be NULL if there is no current user but may
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* also be NULL if the consumer doesn't set this up
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*/
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struct gpioline_info {
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__u32 line_offset;
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__u32 flags;
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char name[32];
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char consumer[32];
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};
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#define GPIO_GET_CHIPINFO_IOCTL _IOR(0xB4, 0x01, struct gpiochip_info)
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#define GPIO_GET_LINEINFO_IOCTL _IOWR(0xB4, 0x02, struct gpioline_info)
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#endif /* _UAPI_GPIO_H_ */
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