X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;ds=sidebyside;f=drivers%2Fserial%2Fserial.c;h=182ca2d149ead9aba81003418e0e6c418dec2890;hb=ac5ba41c2234dd513ed2c879914e964cc05a0135;hp=76425d87901ff13930b02183e9347349e0aa8c0e;hpb=1378df792a7ff3abd1bf54a63f5475784f5b083c;p=u-boot

diff --git a/drivers/serial/serial.c b/drivers/serial/serial.c
index 76425d8790..182ca2d149 100644
--- a/drivers/serial/serial.c
+++ b/drivers/serial/serial.c
@@ -144,8 +144,13 @@ static int calc_divisor (NS16550_t port)
 #else
 #define MODE_X_DIV 16
 #endif
-	return (CFG_NS16550_CLK / MODE_X_DIV / gd->baudrate);
 
+	/* Compute divisor value. Normally, we should simply return:
+	 *   CFG_NS16550_CLK) / MODE_X_DIV / gd->baudrate
+	 * but we need to round that value by adding 0.5 or 8/16.
+	 * Rounding is especially important at high baud rates.
+	 */
+	return (((16 * CFG_NS16550_CLK) / MODE_X_DIV / gd->baudrate) + 8) / 16;
 }
 
 #if !defined(CONFIG_SERIAL_MULTI)