--- linux-2.6.39.4-original/drivers/tty/serial/pch_uart.c	2011-08-03 12:43:28.000000000 -0700
+++ linux-2.6.39.4/drivers/tty/serial/pch_uart.c	2012-09-18 14:09:27.000000000 -0700
@@ -1405,7 +1405,10 @@
 	if (!rxbuf)
 		goto init_port_free_txbuf;
 
-	base_baud = 1843200; /* 1.8432MHz */
+	/* Change the default input reference clock to 48MHz */
+
+	/* base_baud = 1843200;*/ /* 1.8432MHz */
+	base_baud = 48000000; /* 48MHz */
 
 	/* quirk for CM-iTC board */
 	board_name = dmi_get_system_info(DMI_BOARD_NAME);