[PATCH 1/1] dt-bindings: iio: adc: add missing vref-supply

[Alexander Stein <alexander.stein@xxxxxxxxxxxxxxx>]

Although this property is used right now for IIO_CHAN_INFO_SCALE,
this ADC has two internal reference voltages, which the driver currently
doesn't make use of.

Fixes: db73419d8c06 ("dt-bindings: iio: adc: Add binding documentation for NXP IMX8QXP ADC")
Signed-off-by: Alexander Stein <alexander.stein@xxxxxxxxxxxxxxx>
---
 .../devicetree/bindings/iio/adc/nxp,imx8qxp-adc.yaml          | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/iio/adc/nxp,imx8qxp-adc.yaml b/Documentation/devicetree/bindings/iio/adc/nxp,imx8qxp-adc.yaml
index 63369ba388e4..879768af0303 100644
--- a/Documentation/devicetree/bindings/iio/adc/nxp,imx8qxp-adc.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/nxp,imx8qxp-adc.yaml
@@ -39,6 +39,9 @@ properties:
   power-domains:
     maxItems: 1
 
+  vref-supply:
+    description: External ADC reference voltage supply on VREFH pad.
+
   "#io-channel-cells":
     const: 1
 
@@ -72,6 +75,7 @@ examples:
             assigned-clocks = <&clk IMX_SC_R_ADC_0>;
             assigned-clock-rates = <24000000>;
             power-domains = <&pd IMX_SC_R_ADC_0>;
+            vref-supply = <&reg_1v8>;
             #io-channel-cells = <1>;
         };
     };
-- 
2.34.1