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Is that what you want? If not, > maxItems should be explicit. Yes, 'maxItems: 2' is what I want but I can also add 'maxItems: 2' in v3 to be explicit/more clear about it. >> + - | >> + #include >> + #include >> + >> + gpio: siul2-gpio@4009d700 { > > gpio@... > > Drop unused label. I will fix in v3. Best regards, Andrei