linux-imx/Documentation/ABI/testing/gpio-cdev
Mauro Carvalho Chehab 54a19b4d3f docs: ABI: cleanup several ABI documents
There are some ABI documents that, while they don't generate
any warnings, they have issues when parsed by get_abi.pl script
on its output result.

Address them, in order to provide a clean output.

Reviewed-by: Tom Rix <trix@redhat.com> # for fpga-manager
Reviewed-By: Kajol Jain<kjain@linux.ibm.com> # for sysfs-bus-event_source-devices-hv_gpci and sysfs-bus-event_source-devices-hv_24x7
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> #for IIO
Acked-by: Oded Gabbay <oded.gabbay@gmail.com> # for Habanalabs
Acked-by: Vaibhav Jain <vaibhav@linux.ibm.com> # for sysfs-bus-papr-pmem
Acked-by: Cezary Rojewski <cezary.rojewski@intel.com> # for catpt
Acked-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Acked-by: Ilya Dryomov <idryomov@gmail.com> # for rbd
Acked-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/5bc78e5b68ed1e9e39135173857cb2e753be868f.1604042072.git.mchehab+huawei@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-10-30 13:14:29 +01:00

666 B

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 and documented in
	[include/uapi]<linux/gpio.h>.

	The following file operations are supported:

	open(2)
	  Currently the only useful flags are O_RDWR.

	ioctl(2)
	  Initiate various actions.

	  See the inline documentation in [include/uapi]<linux/gpio.h>
	  for descriptions of all ioctls.

	close(2)
	  Stops and free up the I/O contexts that was associated
	  with the file descriptor.

Users: TBD