Hi Rob I noticed that it seems "$ref: audio-graph-port.yaml#" is not working. For example, below is under "renesas,rcar.yaml" control which is using "$ref: audio-graph-port.yaml#" for ports/port and endpoint. "audio-graph-port.yaml" has "endpoint" properties, and below are not allowed by it. But there is no warning/error by make dtbs_check DT_SCHEMA_FILES=Documentation/devicetree/bindings/sound/renesas,rsnd.yaml Am I misunderstanding ? -------- diff --git a/arch/arm64/boot/dts/renesas/ulcb.dtsi b/arch/arm64/boot/dts/renesas/ulcb.dtsi index 1f177af3eb9d..f40ec421b45a 100644 --- a/arch/arm64/boot/dts/renesas/ulcb.dtsi +++ b/arch/arm64/boot/dts/renesas/ulcb.dtsi @@ -410,8 +410,8 @@ rsnd_port0: port@0 { rsnd_for_ak4613: endpoint { remote-endpoint = <&ak4613_endpoint>; - dai-format = "left_j"; + dai-format = "foo-bar"; - bitclock-master = <&rsnd_for_ak4613>; + bitclock-master = <1>; frame-master = <&rsnd_for_ak4613>; playback = <&ssi0>, <&src0>, <&dvc0>; ------ Thank you for your help !! Best regards --- Kuninori Morimoto