How to enable I2S/pcm5102a sound device on NanoPi NEO2?

Hello, happily running DietPi on an RPi4. Also trying to get it fully working on a NanoPi NEO2 (built into my MiniDSP SHD). It installs, it runs, but I cannot figure out how to enable I2S and make the TI pcm5102a based device/hat work. The driver seems to be there. But there is no option to enable I2S. And I may have to add an overlay, but can’t figure out which one (if needed/available at all)? Any suggestion to make this work would be appreciated. Thanks!