On 25/12/2022 11:31, Hal Feng wrote: > > gmac0_rmii_refin: clock { > ... > }; > > gmac0_rgmii_rxin: clock { > ... > }; > ... > >> nothing. It looks like you avoid to define proper clock controller. >> What's the point for all these clocks? These are no-op. > > These are all external fixed rate clocks inputted to the SoC. They are the root If they are all external, then it is fine. > >> >>> + compatible = "fixed-clock"; >>> + #clock-cells = <0>; >>> + }; Best regards, Krzysztof