The camera sensor is connected on i2c bus for config
and on a parallel bus on the main SoC.
Currently, the i2c driver remains userland, but this is intended to
change in the future. The v4l2_subdev part is the way to go in the future
and it is the mainline way of configuring i2c camera sensors on Linux.
Currently only the max framerate is supported because it is the one that
is to be used on the bebop optical flow.
Julien BERAUD