USB otg as serial

[axjslack]

I know that this not a proper issue, but may be useful for others: do you know it there is a way to use the OTG usb of CI20 as serial for console (both u-boot and kernel)? I see something similar on some TI boards or ST-Ericsson board.

This would be helpful for people that don't want (or can't) to use the TTL serial.

[ZubairLK]

Perhaps. Using the gadget serial driver it might be possible to use the OTG port as a serial console under Linux. Something similar might exist in u-boot as well.

This might help.
https://www.kernel.org/doc/Documentation/usb/gadget_serial.txt

But 'technically possible' doesn't mean it works. ;)

There will be SW side effort involved in getting it done.

fyi. in some boards, the usb port is physically used.
But behind the physical usb port, the actual chip is a usb to ftdi ttl converter.
Hence it is a standard serial port behind the scenes.