diff --git a/arch/arm/dts/dragonboard820c.dts b/arch/arm/dts/dragonboard820c.dts
index 7bfae1c..7457d7b 100644
--- a/arch/arm/dts/dragonboard820c.dts
+++ b/arch/arm/dts/dragonboard820c.dts
@@ -50,6 +50,7 @@
 		blsp2_uart1: serial@75b0000 {
 			compatible = "qcom,msm-uartdm-v1.4", "qcom,msm-uartdm";
 			reg = <0x75b0000 0x1000>;
+			clock = <&gcc 4>;
 		};
 
 		sdhc2: sdhci@74a4900 {