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 and documented in
10		[include/uapi]<linux/gpio.h>.
11
12		The following file operations are supported:
13
14		open(2)
15		  Currently the only useful flags are O_RDWR.
16
17		ioctl(2)
18		  Initiate various actions.
19
20		  See the inline documentation in [include/uapi]<linux/gpio.h>
21		  for descriptions of all ioctls.
22
23		close(2)
24		  Stops and free up the I/O contexts that was associated
25		  with the file descriptor.
26
27Users:		TBD