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Subject[PATCH v3 16/17] ASoC: add simple-graph-scu-card document
Date

From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
---
v2 -> v3

- Added how to use Simple-Graph-SCU-Card, and cleaned-up

.../bindings/sound/simple-graph-scu-card.txt | 65 ++++++++++++++++++++++
1 file changed, 65 insertions(+)
create mode 100644 Documentation/devicetree/bindings/sound/simple-graph-scu-card.txt

diff --git a/Documentation/devicetree/bindings/sound/simple-graph-scu-card.txt b/Documentation/devicetree/bindings/sound/simple-graph-scu-card.txt
new file mode 100644
index 0000000..223096a
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/simple-graph-scu-card.txt
@@ -0,0 +1,65 @@
+Simple-Graph-SCU-Card:
+
+Simple-Graph-SCU-Card specifies audio DAI connections of SoC <-> codec.
+It is based on common bindings for device graphs.
+see ${LINUX}/Documentation/devicetree/bindings/graph.txt
+
+Basically, Simple-Graph-SCU-Card property is same as Simple-Card / Simple-Graph-Card.
+see ${LINUX}/Documentation/devicetree/bindings/sound/simple-card.txt
+ ${LINUX}/Documentation/devicetree/bindings/sound/simple-graph-card.txt
+
+Main difference between Simple-Graph-Card and Simple-Graph-SCU-Card is that
+Simple-Graph-SCU-Card can use multi CPU.
+
+Required properties:
+
+- compatible : "asoc-simple-graph-scu-card";
+- simple-audio-card,routing : see simple-card.txt
+
+Example
+
+ak4643: codec@12 {
+ compatible = "asahi-kasei,ak4643";
+ ...
+ port {
+ ak4643_fe: endpoint@0 {
+ remote-endpoint = <&rsnd_fe>;
+ ...
+ };
+ ak4643_be: endpoint@1 {
+ remote-endpoint = <&rsnd_be>;
+ ...
+ };
+ };
+};
+
+rcar_sound {
+ ...
+ ports {
+ compatible = "asoc-simple-graph-scu-card";
+
+ simple-audio-card,name = "graph-sound";
+ simple-audio-card,format = "left_j";
+ simple-audio-card,bitclock-master = <&rsnd_fe>;
+ simple-audio-card,frame-master = <&rsnd_fe>;
+ simple-audio-card,convert-rate = <48000>;
+ simple-audio-card,convert-channels = <2>;
+ simple-audio-card,prefix = "ak4642";
+ simple-audio-card,routing =
+ "ak4642 Playback", "DAI0 Playback",
+ "ak4642 Playback", "DAI1 Playback";
+
+ port@0 {
+ rsnd_fe: endpoint@0 {
+ remote-endpoint = <&ak4643_fe>;
+ ...
+ };
+ };
+ port@1 {
+ rsnd_be: endpoint@1 {
+ remote-endpoint = <&ak4643_be>;
+ ...
+ };
+ };
+ };
+};
--
1.9.1
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