Linux kernel mirror (for testing)
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linux
1What: /dev/gpiochip[0-9]+
2Date: November 2015
3KernelVersion: 4.4
4Contact: linux-gpio@vger.kernel.org
5Description:
6 The character device files /dev/gpiochip* are the interface
7 between GPIO chips and userspace.
8
9 The ioctl(2)-based ABI is defined in
10 [include/uapi]<linux/gpio.h> and documented in
11 Documentation/userspace-api/gpio/chardev.rst.
12
13 The following file operations are supported:
14
15 open(2)
16 Currently the only useful flags are O_RDWR.
17
18 ioctl(2)
19 Initiate various actions.
20
21 See Documentation/userspace-api/gpio/chardev.rst
22 for a description of all ioctls.
23
24 close(2)
25 Stops and free up the I/O contexts that was associated
26 with the file descriptor.
27
28Users: TBD