openwrt-archive/target/linux/imx6/patches-4.4/100-bootargs.patch

--- a/arch/arm/boot/dts/imx6dl-wandboard.dts
+++ b/arch/arm/boot/dts/imx6dl-wandboard.dts
@@ -19,4 +19,8 @@
 	memory {
 		reg = <0x10000000 0x40000000>;
 	};
+
+	chosen {
+		bootargs = "console=ttymxc0,115200";
+	};
 };