On Sun, May 22, 2022 at 5:50 PM Tomer Maimon <tmaimon77@xxxxxxxxx> wrote: > +/ { > + model = "Nuvoton npcm845 Development Board (Device Tree)"; > + compatible = "nuvoton,npcm845"; > + > + aliases { > + serial0 = &serial0; > + serial1 = &serial1; > + serial2 = &serial2; > + serial3 = &serial3; > + }; > + apb { > + serial0: serial@0 { > + status = "okay"; > + }; > + > + serial1: serial@1000 { > + status = "disabled"; > + }; > + > + serial2: serial@2000 { > + status = "disabled"; > + }; > + > + serial3: serial@3000 { > + status = "disabled"; > + }; Please drop the aliases for disabled uarts. It probably also makes sense to have the status="disabled" properties in the .dtsi file and only override them when you explicitly want to enable a uart for a board. Arnd