diff --git a/Documentation/devicetree/bindings/pci/rockchip,rk3399-pcie.yaml b/Documentation/devicetree/bindings/pci/rockchip,rk3399-pcie.yaml
index 531008f0b6ac..002b728cbc71 100644
--- a/Documentation/devicetree/bindings/pci/rockchip,rk3399-pcie.yaml
+++ b/Documentation/devicetree/bindings/pci/rockchip,rk3399-pcie.yaml
@@ -37,6 +37,7 @@ properties:
     description: This property is needed if using 24MHz OSC for RC's PHY.
 
   ep-gpios:
+    maxItems: 1
     description: pre-reset GPIO
 
   vpcie12v-supply: