On Tue, Mar 30, 2021 at 11:06:30AM +0800, Zhen Lei wrote: > When I do dt_binding_check, below warning is reported: > Documentation/devicetree/bindings/sound/renesas,rsnd.example.dt.yaml: \ > sound@ec500000: 'dais' is a required property > > I looked at all the dts files in the "arch/arm64/boot/dts/renesas/" > directory, I found that all nodes that contain the "dais" property have > compatible string: "audio-graph-card". So I can be sure that the > "$ref: audio-graph.yaml#" should be corrected to > "$ref: audio-graph-card.yaml#". > > In addition, not all nodes have compatible string "audio-graph-card", so > the "$ref: audio-graph-card.yaml#" should be described as "anyOf". To > ensure the validation of "anyOf" always passes, group it with the "if" > statement, because the result of the "if" statement is always not empty. 'anyOf' is probably not right here. In any case, the is going to conflict with my series[1]. Rob [1] https://lore.kernel.org/r/20210323163634.877511-1-robh@xxxxxxxxxx/