diff --git a/arch/mips/dts/ar9331.dtsi b/arch/mips/dts/ar9331.dtsi
index 9485fbff5..8280588ab 100644
--- a/arch/mips/dts/ar9331.dtsi
+++ b/arch/mips/dts/ar9331.dtsi
@@ -24,6 +24,8 @@
 		};
 
 		spi: spi@bf000000{
+			#address-cells = <1>;
+			#size-cells = <0>;
 			compatible = "qca,ath79-spi";
 			reg = <0xbf000000 0x01000000>;
 			status = "disabled";