v2 --> v3: Modified based on Rob's review comments. For example, "ports" and "port" are not allowed at the same time. For the details, please refer: https://www.mail-archive.com/linux-kernel@xxxxxxxxxxxxxxx/msg2539753.html v1 --> v2: The analysis was not clear in the previous version, "$ref: audio-graph.yaml#" is not required. It was then adjusted based on the following patch series: [1] https://lore.kernel.org/r/20210323163634.877511-1-robh@xxxxxxxxxx/ v1: When I do dt_binding_check for all YAML files, below warning is reported: /root/mainline/Documentation/devicetree/bindings/sound/renesas,rsnd.example.dt.yaml: sound@ec500000: 'dais' is a required property From schema: /root/mainline/Documentation/devicetree/bindings/sound/renesas,rsnd.yaml make dt_binding_check -j24 2>err.txt Before: cat err.txt | wc -l 2 After: cat err.txt | wc -l 0 make dtbs_check DT_SCHEMA_FILES=Documentation/devicetree/bindings/sound/renesas,rsnd.yaml -j24 2>err.txt Before: cat err.txt | wc -l 130 After: cat err.txt | wc -l 0 Zhen Lei (2): ASoC: dt-bindings: renesas, rsnd: Clear warning 'dais' is a required property ASoC: dt-bindings: renesas, rsnd: Clear warning 'ports' does not match any of the regexes .../devicetree/bindings/sound/renesas,rsnd.yaml | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) -- 2.26.0.106.g9fadedd