Hi Rob Thank you for reviewing > > +patternProperties: > > # For DAI base > > - rcar_sound,dai: > > + 'rcar_sound,dai(@[0-9a-f]+)?$': > > With a unit-address you need a 'reg' property. (snip) > Here too would need a 'reg' property. Did you test any of this because > that would be a dtc warning. I don't remember detail, but some reviewer indicated that it is not needed, because we have default "reg" property somewhere/somehow. Thank you for your help !! Best regards --- Kuninori Morimoto