> Ok, looks like a more flexible way to doing it. Let's go with something > like this: > > renesas,miic-port-connection = <PORTIN_GMAC2>, <MAC2>, <SWITCH_PORTC>, > <SWITCH_PORTB>, <SWITCH_PORTA>; Not all combinations are possible. In fact, there is a limited choice for each value. So consider getting the yaml tools to help you by listing what is valid for each setting. You might need a different format than. Also, this format it is not clear what each value refers to. renesas,miic-port-connection-mii-conv1 = <PORTIN_GMAC2>; renesas,miic-port-connection-mii-conv2 = <MAC2>; renesas,miic-port-connection-mii-conv3 = <SWITCH_PORTC>; renesas,miic-port-connection-mii-conv4 = <SWITCH_PORTB>; renesas,miic-port-connection-mii-conv5 = <SWITCH_PORTA>; is more sense documenting, and i suspect easier to make the validator work for you. Andrew