ASoC: dt-bindings: add regulator support to dmic codec

Add optional vref-supply property to describe the regulator supplying
the digital microphones.

Signed-off-by: Olivier Moysan <olivier.moysan@foss.st.com>
Acked-by: "Rob Herring (Arm)" <robh@kernel.org>
Link: https://patch.msgid.link/20250306171840.593443-2-olivier.moysan@foss.st.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/Documentation/devicetree/bindings/sound/dmic-codec.yaml b/Documentation/devicetree/bindings/sound/dmic-codec.yaml
index 59ef0cf6b6e5e1bf627e6df7337ac3c7b067c43b..cc3c84dd4c26fd30c24225657fdb0275089dbe67 100644 (file)
--- a/Documentation/devicetree/bindings/sound/dmic-codec.yaml
+++ b/Documentation/devicetree/bindings/sound/dmic-codec.yaml
@@ -19,6 +19,9 @@ properties:
   '#sound-dai-cells':
     const: 0
 
+  vref-supply:
+    description: Phandle to the digital microphone reference supply
+
   dmicen-gpios:
     description: GPIO specifier for DMIC to control start and stop
     maxItems: 1