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V4L2 UART subdevice

Randy Scheifele
Intellectual 550 points

Hi,

I am currently using a video decoder chip whose control interface is a UART bus.  I have been able to understand how to create SPI and I2C subdevices in the V4L2 framework, but I there doesn't seem to be any supporting API's for UART subdevices.

What I really want is access to a kernel API that is similar to a userspace read/write API.  I have a user space program that I can use to read/write registers on the video decoder chip but since it needs to be part of the V4L2 subdevice framework, this code needs to execute in kernel space.

Has anyone done this before?  Anyone have any hints/tips?

Thanks,

Randy