On Wednesday 27 October 2021 17:27:41 Stefan Roese wrote: > Still I see no speed change. But this is a different story...
Could you try to upload some file in u-boot via xmodem at different speeds? E.g. via loadx command: loadx <addr> 921600 and loadx <addr> 115200 And compare if xmodem transfer is in U-Boot faster or not. Ideally also try via kermit protocol at different speeds as kernel supports streaming. This could verify if issue is in kwboot or in USB-UART/kernel.
