I'm working on getting a driver squared away in the 2.5 kernel and some red
flags were raised regarding parsing writes to entries in /proc. The cpia
and zoran drivers both look like they allow writes to a single entry in
/proc and parse the write to see if it is a proper control adjustment. The
writes are normally used to alter settings for which V4L has no matching
parameter. I copied fairly closely the parsing mechanism from cpia, but
many on the usb list felt that any parsing in the kernel space is
inappropriate. Greg KH believes a more appropriate method would be to
create a directory entry for each device and have one value per file, so:
echo "gain=5" >/proc/video/vicam/video0
becomes
echo "5" >/proc/video/vicam/video0/gain
I have no attachment to either method and am perfectly willing to implement
the latter method. I just wanted to see if anybody had strong opinions on
the matter.
-Joe
