AD4030 and similar devices all connect to the system as SPI peripherals.
Reference spi-peripheral-props so common SPI peripheral can be used from
ad4030 dt-binding.

Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Marcelo Schmitt <marcelo.schmitt@analog.com>
---
 Documentation/devicetree/bindings/iio/adc/adi,ad4030.yaml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad4030.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad4030.yaml
index 54e7349317b7..a8fee4062d0e 100644
--- a/Documentation/devicetree/bindings/iio/adc/adi,ad4030.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/adi,ad4030.yaml
@@ -20,6 +20,8 @@ description: |
   * https://www.analog.com/media/en/technical-documentation/data-sheets/ad4630-24_ad4632-24.pdf
   * https://www.analog.com/media/en/technical-documentation/data-sheets/ad4630-16-4632-16.pdf
 
+$ref: /schemas/spi/spi-peripheral-props.yaml#
+
 properties:
   compatible:
     enum:
-- 
2.39.2