ASoC: dt-bindings: nau8822: Add supply regulators

NAU8822 has 4 power supply pins: VDDA, VDDB, VDDC and VDDSPK, which need
to be online and stable before communication with the device is attempted.

List them (as optional) so that device tree users can ensure correct power
sequencing.

Signed-off-by: Alexey Charkov <alchark@flipper.net>
Link: https://patch.msgid.link/20260525-nau8822-reg-v2-1-7d37ae393e46@flipper.net
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/Documentation/devicetree/bindings/sound/nuvoton,nau8822.yaml b/Documentation/devicetree/bindings/sound/nuvoton,nau8822.yaml
index cb8182bbc491fca5430e1294d81daf204b6a2669..cf4c130382411da28092001d33438262bb1e2f34 100644 (file)
--- a/Documentation/devicetree/bindings/sound/nuvoton,nau8822.yaml
+++ b/Documentation/devicetree/bindings/sound/nuvoton,nau8822.yaml
@@ -30,6 +30,20 @@ properties:
   clock-names:
     const: mclk
 
+  vdda-supply:
+    description: Analog power supply
+
+  vddb-supply:
+    description: Digital buffer (input/output) supply
+
+  vddc-supply:
+    description: Digital core supply
+
+  vddspk-supply:
+    description:
+      Speaker supply (power supply pin for RSPKOUT, LSPKOUT, AUXOUT2 and
+      AUXTOUT1 output drivers)
+
   nuvoton,spk-btl:
     description:
       If set, configure the two loudspeaker outputs as a Bridge Tied Load output
@@ -54,5 +68,9 @@ examples:
         codec@1a {
             compatible = "nuvoton,nau8822";
             reg = <0x1a>;
+            vdda-supply = <&vcca_3v3_s0>;
+            vddb-supply = <&vcca_3v3_s0>;
+            vddc-supply = <&vcca_3v3_s0>;
+            vddspk-supply = <&vcca_3v3_s0>;
         };
     };