Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) What:		/dev/gpiochip[0-9]+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) Date:		November 2015
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) KernelVersion:	4.4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) Contact:	linux-gpio@vger.kernel.org
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) 		The character device files /dev/gpiochip* are the interface
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) 		between GPIO chips and userspace.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 		The ioctl(2)-based ABI is defined and documented in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 		[include/uapi]<linux/gpio.h>.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 		The following file operations are supported:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 		open(2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 		  Currently the only useful flags are O_RDWR.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 		ioctl(2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 		  Initiate various actions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 		  See the inline documentation in [include/uapi]<linux/gpio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 		  for descriptions of all ioctls.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 		close(2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 		  Stops and free up the I/O contexts that was associated
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 		  with the file descriptor.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) Users:		TBD