[PATCH 2/8] ASoC: rockchip: rk3308: add audio card bindings

[luca . ceresoli]

From: Luca Ceresoli <luca.ceresoli@xxxxxxxxxxx>

Add device tree bindings document for the audio card based on the internal
I2S of the Rockchip RK3308 SoC.

Signed-off-by: Luca Ceresoli <luca.ceresoli@xxxxxxxxxxx>
---
 .../rockchip,rk3308-audio-graph-card.yaml     | 50 +++++++++++++++++++
 MAINTAINERS                                   |  5 ++
 2 files changed, 55 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/sound/rockchip,rk3308-audio-graph-card.yaml

diff --git a/Documentation/devicetree/bindings/sound/rockchip,rk3308-audio-graph-card.yaml b/Documentation/devicetree/bindings/sound/rockchip,rk3308-audio-graph-card.yaml
new file mode 100644
index 000000000000..8445a69dcdbb
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/rockchip,rk3308-audio-graph-card.yaml
@@ -0,0 +1,50 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/rockchip,rk3308-audio-graph-card.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Rockchip RK3308 Audio card based on internal I2S
+
+maintainers:
+  - Luca Ceresoli <luca.ceresoli@xxxxxxxxxxx>
+
+allOf:
+  - $ref: /schemas/sound/audio-graph.yaml#
+
+properties:
+  compatible:
+    const: rockchip,rk3308-audio-graph-card
+
+required:
+  - compatible
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    sound {
+        compatible = "rockchip,rk3308-audio-graph-card";
+        dais = <&i2s_8ch_2_port>;
+    };
+
+    i2s_8ch_2 {
+        i2s_8ch_2_port: port {
+            i2s_8ch_2_endpoint: endpoint {
+                remote-endpoint = <&acodec_endpoint>;
+                dai-format = "i2s";
+
+                /* The RK3308 acodec has no clock dividers, use the CPU */
+                bitclock-master = <&i2s_8ch_2_endpoint>;
+                frame-master = <&i2s_8ch_2_endpoint>;
+            };
+        };
+    };
+
+    acodec {
+        port {
+            acodec_endpoint: endpoint {
+                remote-endpoint = <&i2s_8ch_2_endpoint>;
+            };
+        };
+    };
diff --git a/MAINTAINERS b/MAINTAINERS
index d53a8e74cb1e..079bdd95dc49 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -17594,6 +17594,11 @@ S:	Maintained
 F:	Documentation/devicetree/bindings/sound/rockchip,rk3308-codec.yaml
 F:	include/dt-bindings/sound/rockchip,rk3308-codec.h
 
+ROCKCHIP RK3308 SOUND CARD DRIVER
+M:	Luca Ceresoli <luca.ceresoli@xxxxxxxxxxx>
+S:	Maintained
+F:	Documentation/devicetree/bindings/sound/rockchip,rk3308-audio-graph-card.yaml
+
 ROCKCHIP VIDEO DECODER DRIVER
 M:	Ezequiel Garcia <ezequiel@xxxxxxxxxxxxxxxxxxxx>
 L:	linux-media@xxxxxxxxxxxxxxx
-- 
2.34.1