diff -urN a/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts b/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts
--- a/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts	2019-12-17 14:43:47.273940258 +0800
+++ b/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts	2019-12-17 14:44:20.300945884 +0800
@@ -19,6 +19,7 @@
 
 	chosen {
 		stdout-path = "serial2:115200n8";
+		bootargs = "console=ttyS2,115200n8";
 	};
 
 	cpus {