From: Kuninori Morimoto <[email protected]> OF graph is used mainly from V4L2, but ALSA needs to use it too. Then, ALSA needs to know each port/endpoint type, otherwise it can't detect ALSA port/endpoint correctly. This patch enables to use type property on OF graph.
Signed-off-by: Kuninori Morimoto <[email protected]> --- Documentation/devicetree/bindings/graph.txt | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/Documentation/devicetree/bindings/graph.txt b/Documentation/devicetree/bindings/graph.txt index fcb1c6a..b5b9040 100644 --- a/Documentation/devicetree/bindings/graph.txt +++ b/Documentation/devicetree/bindings/graph.txt @@ -110,6 +110,32 @@ device-2 { }; }; +port / endpoint type +-------------------- + +Each ports / port / endpoint can have its type if needed. +child node can take over parent node type. below example indicates +device0 type is "typeA" && "typeB", +device1 type is "typeA" && "typeB" && "typeC". + +device { + ports { + type = "typeA"; + + port@0 { + type = "typeB"; + + device0: endpoint@0 { + }; + + device1: endpoint@1 { + type = "typeC"; + }; + }; + ... + }; +}; + Required properties ------------------- -- 1.9.1
