diff -ruN linux-2.4.ORIG/arch/ppc/8xx_io/commproc.c linux-2.4/arch/ppc/8xx_io/commproc.c
--- linux-2.4.ORIG/arch/ppc/8xx_io/commproc.c	2002-09-28 05:53:19.000000000 -0400
+++ linux-2.4/arch/ppc/8xx_io/commproc.c	2003-01-18 13:34:23.000000000 -0500
@@ -404,13 +404,18 @@
 	*/
 	bp = (uint *)&cpmp->cp_brgc1;
 	bp += brg;
+
 	/* The BRG has a 12-bit counter.  For really slow baud rates (or
 	 * really fast processors), we may have to further divide by 16.
+	 *
+	 * NOTE: for integer math division, adding (divisor/2) to numerator
+	 * rounds up (if fractional part would be >= .5) for more precision
 	 */
-	if (((BRG_UART_CLK / rate) - 1) < 4096)
-		*bp = (((BRG_UART_CLK / rate) - 1) << 1) | CPM_BRG_EN;
+
+	if ((((BRG_UART_CLK + (rate/2))/ rate) - 1) < 4096)
+		*bp = ((((BRG_UART_CLK +(rate/2)) / rate) - 1) << 1) | CPM_BRG_EN;
 	else
-		*bp = (((BRG_UART_CLK_DIV16 / rate) - 1) << 1) |
+		*bp = ((((BRG_UART_CLK_DIV16 + (rate/2))/ rate) - 1) << 1) |
 						CPM_BRG_EN | CPM_BRG_DIV16;
 }