1 files changed, 2 insertions, 2 deletions

diff --git a/arch/arm/mach-at91/board-csb637.c b/arch/arm/mach-at91/board-csb637.c
index 419fd19b620b..bb1a5474ddab 100644
--- a/arch/arm/mach-at91/board-csb637.c
+++ b/arch/arm/mach-at91/board-csb637.c
@@ -45,10 +45,10 @@ static void __init csb637_map_io(void)
         /* Initialize processor: 3.6864 MHz crystal */
         at91rm9200_initialize(3686400, AT91RM9200_BGA);
 
-        /* DBGU on ttyS0 */
+        /* DBGU on ttyS0. (Rx & Tx only) */
         at91_register_uart(0, 0, 0);
 
-        /* make console=ttyS0 the default */
+        /* make console=ttyS0 (ie, DBGU) the default */
         at91_set_serial_console(0);
 }