diff --git a/arch/arm/boot/dts/rk3126-86v.dts b/arch/arm/boot/dts/rk3126-86v.dts
index 00c81f8dc015..92abb3794697 100644
--- a/arch/arm/boot/dts/rk3126-86v.dts
+++ b/arch/arm/boot/dts/rk3126-86v.dts
@@ -59,7 +59,7 @@
         };
 	
     chosen {
-	bootargs = "vmalloc=496M cma=4M";
+	bootargs = "vmalloc=496M cma=4M rockchip_jtag";
        };
 
 };
diff --git a/arch/arm/boot/dts/rk312x-sdk.dtsi b/arch/arm/boot/dts/rk312x-sdk.dtsi
index 78318f99edf6..8f629d3b01d7 100755
--- a/arch/arm/boot/dts/rk312x-sdk.dtsi
+++ b/arch/arm/boot/dts/rk312x-sdk.dtsi
@@ -10,7 +10,7 @@
 	};
 
 	chosen {
-		bootargs = "vmalloc=496M";
+		bootargs = "vmalloc=496M rockchip_jtag";
 	};
 
 	pwm_regulator1:pwm-regulator1 {