diff --git a/Documentation/devicetree/bindings/iio/dac/adi,ad3552r.yaml b/Documentation/devicetree/bindings/iio/dac/adi,ad3552r.yaml
index 41fe000347428..2d2561a526838 100644
--- a/Documentation/devicetree/bindings/iio/dac/adi,ad3552r.yaml
+++ b/Documentation/devicetree/bindings/iio/dac/adi,ad3552r.yaml
@@ -60,6 +60,12 @@ properties:
     $ref: /schemas/types.yaml#/definitions/uint32
     enum: [0, 1, 2, 3]
 
+  io-backends:
+    description: The iio backend reference.
+      Device can be optionally connected to the "axi-ad3552r IP" fpga-based
+      QSPI + DDR (Double Data Rate) controller to reach high speed transfers.
+    maxItems: 1
+
   '#address-cells':
     const: 1
 
@@ -128,6 +134,7 @@ patternProperties:
           - custom-output-range-config
 
 allOf:
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
   - if:
       properties:
         compatible: