From: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
---
v1 -> v2
- no change
.../bindings/sound/simple-graph-card.txt | 137 +++++++++++++++++++++
1 file changed, 137 insertions(+)
create mode 100644 Documentation/devicetree/bindings/sound/simple-graph-card.txt
diff --git a/Documentation/devicetree/bindings/sound/simple-graph-card.txt b/Documentation/devicetree/bindings/sound/simple-graph-card.txt
new file mode 100644
index 0000000..5fa7b74
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/simple-graph-card.txt
@@ -0,0 +1,137 @@
+Simple-Graph-Card:
+
+Simple-Graph-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-Card property is same as Simple-Card.
+see ${LINUX}/Documentation/devicetree/bindings/sound/simple-card.txt
+
+Below are same as Simple-Card.
+
+- simple-audio-card,name
+- simple-audio-card,format
+- simple-audio-card,frame-master
+- simple-audio-card,bitclock-master
+- simple-audio-card,bitclock-inversion
+- simple-audio-card,frame-inversion
+- simple-audio-card,dai-tdm-slot-num
+- simple-audio-card,dai-tdm-slot-width
+- clocks / system-clock-frequency
+
+These should be implemented
+- simple-audio-card,widgets
+- simple-audio-card,routing
+- simple-audio-card,mclk-fs
+- simple-audio-card,hp-det-gpio
+- simple-audio-card,mic-det-gpio
+
+Required properties:
+
+- compatible : "asoc-simple-graph-card";
+- dais : list of CPU DAI port{s}
+
+Example: Single DAI case
+
+ sound_card: sound {
+ compatible = "asoc-simple-graph-card";
+
+ dais = <&cpu_port>;
+ };
+
+ codec {
+ ...
+ port {
+ codec_endpoint: endpoint {
+ remote-endpoint = <&cpu_endpoint>;
+ };
+ };
+ };
+
+ cpu {
+ ...
+ cpu_port: port@0 {
+ cpu_endpoint: endpoint {
+ remote-endpoint = <&codec_endpoint>;
+
+ simple-audio-card,format = "left_j";
+ simple-audio-card,bitclock-master = <&cpu_endpoint>;
+ simple-audio-card,frame-master = <&cpu_endpoint>;
+ ...
+ };
+ };
+ };
+
+Example: Multi DAI case
+
+ sound_card: sound {
+ compatible = "asoc-simple-graph-card";
+
+ dais = <&cpu_port0
+ &cpu_port1
+ &cpu_port2>;
+ };
+
+ codec0 {
+ ...
+ port {
+ codec0_endpoint: endpoint {
+ remote-endpoint = <&cpu_endpoint0>;
+ };
+ };
+ };
+
+ codec1 {
+ ...
+ port {
+ codec1_endpoint: endpoint {
+ remote-endpoint = <&cpu_endpoint1>;
+ };
+ };
+ };
+
+ codec2 {
+ ...
+ port {
+ codec2_endpoint: endpoint {
+ remote-endpoint = <&cpu_endpoint2>;
+ };
+ };
+ };
+
+ cpu {
+ ...
+ ports {
+ cpu_port0: port@0 {
+ cpu_endpoint0: endpoint {
+ remote-endpoint = <&codec0_endpoint>;
+
+ simple-audio-card,format = "left_j";
+ simple-audio-card,bitclock-master = <&cpu_endpoint0>;
+ simple-audio-card,frame-master = <&cpu_endpoint0>;
+ ...
+ };
+ };
+ cpu_port1: port@1 {
+ cpu_endpoint1: endpoint {
+ remote-endpoint = <&codec1_endpoint>;
+
+ simple-audio-card,format = "i2s";
+ simple-audio-card,bitclock-master = <&cpu_endpoint1>;
+ simple-audio-card,frame-master = <&cpu_endpoint1>;
+ ...
+ };
+ };
+ cpu_port2: port@2 {
+ cpu_endpoint2: endpoint {
+ remote-endpoint = <&codec2_endpoint>;
+
+ simple-audio-card,format = "i2s";
+ simple-audio-card,bitclock-master = <&cpu_endpoint2>;
+ simple-audio-card,frame-master = <&cpu_endpoint2>;
+ ...
+ };
+ };
+ };
+ };
+
--
1.9.1
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