iCameraProperties where do the ranges get read

what is the mapping for gain and exposure compensation to the device tree params.

I am trying to map v4l2 stuff to my vendors device tree and not getting anywhere.

v4l2-ctl --all seem to have alot of zero’s in the Camera Controls part of my system.
also v4l2-compliance -d /dev/video0 shows that one of the IOCTL fails,

Thanks
Terry

Thanks
Terry