diff --git a/arch/arm/boot/dts/r8a7790.dtsi b/arch/arm/boot/dts/r8a7790.dtsi
index 9df57122e9c05d74948a2026b2e933e2bcb3eac2..2c55c4b8295ffd94e6862124c02342b00d298c95 100644
--- a/arch/arm/boot/dts/r8a7790.dtsi
+++ b/arch/arm/boot/dts/r8a7790.dtsi
@@ -487,6 +487,15 @@
 			clock-output-names = "extal";
 		};
 
+		/* External PCIe clock - can be overridden by the board */
+		pcie_bus_clk: pcie_bus_clk {
+			compatible = "fixed-clock";
+			#clock-cells = <0>;
+			clock-frequency = <100000000>;
+			clock-output-names = "pcie_bus";
+			status = "disabled";
+		};
+
 		/*
 		 * The external audio clocks are configured as 0 Hz fixed frequency clocks by
 		 * default. Boards that provide audio clocks should override them.