[PATCH 2/2] doc: dts: Add device tree information regarding wm8940 codec

[Lukasz Majewski]

This commit provides documentation entry for wm8940 codec.

Signed-off-by: Lukasz Majewski <lukma at denx.de>
---
 .../devicetree/bindings/sound/wlf,wm8940.yaml | 57 +++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/sound/wlf,wm8940.yaml

diff --git a/Documentation/devicetree/bindings/sound/wlf,wm8940.yaml b/Documentation/devicetree/bindings/sound/wlf,wm8940.yaml
new file mode 100644
index 000000000000..8aadcbeed502
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/wlf,wm8940.yaml
@@ -0,0 +1,57 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/wlf,wm8940.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Wolfson WM8940 Codec Device Tree Bindings
+
+maintainers:
+  - patches at opensource.cirrus.com
+
+properties:
+  '#sound-dai-cells':
+    const: 0
+
+  compatible:
+    const: wlf,wm8940
+
+  reg:
+    maxItems: 1
+
+  spi-max-frequency:
+    maximum: 526000
+
+required:
+  - '#sound-dai-cells'
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        codec at 0 {
+            #sound-dai-cells = <0>;
+            compatible = "wlf,wm8940";
+            reg = <0>;
+            spi-max-frequency = <500000>;
+        };
+    };
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        codec at 1a {
+            #sound-dai-cells = <0>;
+            compatible = "wlf,wm8940";
+            reg = <0x1a>;
+        };
+    };
+
+...
-- 
2.35.1