[PATCH 1/2] ASoC: dt-bindings: nau8822: Add supply regulators

[Alexey Charkov]

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@xxxxxxxxxxx>
---
 .../devicetree/bindings/sound/nuvoton,nau8822.yaml         | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/nuvoton,nau8822.yaml b/Documentation/devicetree/bindings/sound/nuvoton,nau8822.yaml
index cb8182bbc491..0a8e40a140c3 100644
--- 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

-- 
2.52.0