What: /dev/gpiochip[0-9]+Date: November 2015KernelVersion: 4.4Contact: linux-gpio@vger.kernel.orgDescription: The character device files /dev/gpiochip* are the interface between GPIO chips and userspace. The ioctl(2)-based ABI is defined in [include/uapi]<linux/gpio.h> and documented in Documentation/userspace-api/gpio/chardev.rst. The following file operations are supported: open(2) Currently the only useful flags are O_RDWR. ioctl(2) Initiate various actions. See Documentation/userspace-api/gpio/chardev.rst for a description of all ioctls. close(2) Stops and free up the I/O contexts that was associated with the file descriptor.Users: TBD
What: /dev/gpiochip[0-9]+
Date: November 2015
KernelVersion: 4.4
Contact: linux-gpio@vger.kernel.org
Description:
The character device files /dev/gpiochip* are the interface
between GPIO chips and userspace.
The ioctl(2)-based ABI is defined in
[include/uapi]<linux/gpio.h> and documented in
Documentation/userspace-api/gpio/chardev.rst.
The following file operations are supported:
open(2)
Currently the only useful flags are O_RDWR.
ioctl(2)
Initiate various actions.
See Documentation/userspace-api/gpio/chardev.rst
for a description of all ioctls.
close(2)
Stops and free up the I/O contexts that was associated
with the file descriptor.
Users: TBD