DFR0941 on Raspberry 4 or 5 doesn't work

Hello all

I am trying to install the DFR0941 board on a Raspberry Pi 4 or 5 with Volumio. Unfortunately I am not able to load the driver yet.

Can anyone help me? The easiest way would be if someone could tell me what the entries in config.txt should be.
Of course I am also grateful if someone knows if it is something else.

Many thanks

Nano