diff --git a/Documentation/devicetree/bindings/spi/spi-rockchip.yaml b/Documentation/devicetree/bindings/spi/spi-rockchip.yaml
index 3fad6ad71abd..fe2f770e42bb 100644
--- a/Documentation/devicetree/bindings/spi/spi-rockchip.yaml
+++ b/Documentation/devicetree/bindings/spi/spi-rockchip.yaml
@@ -99,6 +99,10 @@ properties:
       slave.
     type: boolean
 
+  ready-gpios:
+    description: GPIO spec for the spi slave ready signal.
+    maxItems: 1
+
 required:
   - compatible
   - reg