[PATCH 1/4] dt-bindings: iio: dac: mcp4922: add vdd-supply property

[Nicolas Frattaroli <frattaroli.nicolas@gmail.com>]

These chips have a vdd supply input, which should be modelled in
the bindings as well. Vref is only the voltage reference supply for
the string DAC.

Signed-off-by: Nicolas Frattaroli <frattaroli.nicolas@gmail.com>
---
 .../devicetree/bindings/iio/dac/microchip,mcp4922.yaml        | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/iio/dac/microchip,mcp4922.yaml b/Documentation/devicetree/bindings/iio/dac/microchip,mcp4922.yaml
index 19374401e509..a3e80e90eeca 100644
--- a/Documentation/devicetree/bindings/iio/dac/microchip,mcp4922.yaml
+++ b/Documentation/devicetree/bindings/iio/dac/microchip,mcp4922.yaml
@@ -21,11 +21,14 @@ properties:
   reg:
     maxItems: 1
 
+  vdd-supply: true
+
   vref-supply: true
 
 required:
   - compatible
   - reg
+  - vdd-supply
   - vref-supply
 
 allOf:
@@ -42,6 +45,7 @@ examples:
         dac@0 {
             compatible = "microchip,mcp4912";
             reg = <0>;
+            vdd-supply = <&dac_reg>;
             vref-supply = <&dac_vref>;
         };
     };
-- 
2.40.0