[PATCH 1/3] ASoC: dt-bindings: nau8821: Add delay control for ADC

[Seven Lee]

Change the original fixed delay to the assignment from the property. It
will make it more flexible to different platforms to avoid pop noise at
the beginning of recording.

Signed-off-by: Seven Lee <wtli@xxxxxxxxxxx>
---
 .../devicetree/bindings/sound/nuvoton,nau8821.yaml        | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/nuvoton,nau8821.yaml b/Documentation/devicetree/bindings/sound/nuvoton,nau8821.yaml
index 054b53954ac3..a726c5a9b067 100644
--- a/Documentation/devicetree/bindings/sound/nuvoton,nau8821.yaml
+++ b/Documentation/devicetree/bindings/sound/nuvoton,nau8821.yaml
@@ -103,6 +103,13 @@ properties:
         just limited to the left adc for design demand.
     type: boolean
 
+  nuvoton,adc-delay-ms:
+    description: Delay (in ms) to make input path stable and avoid pop noise.
+        The default value is 125 and range between 125 to 500 ms.
+    minimum: 125
+    maximum: 500
+    default: 125
+
   '#sound-dai-cells':
     const: 0
 
@@ -136,6 +143,7 @@ examples:
             nuvoton,jack-eject-debounce = <0>;
             nuvoton,dmic-clk-threshold = <3072000>;
             nuvoton,dmic-slew-rate = <0>;
+            nuvoton,nuvoton,adc-delay-ms = <125>;
             #sound-dai-cells = <0>;
         };
     };
-- 
2.25.1