[PATCH] serial: zynq: Use DIV_ROUND_CLOSEST() to calcurate divider value

[Kunihiko Hayashi]

Since the calulation of "bgen" is rounded down, using a higher
baudrate will result in a larger difference from the actual
baudrate. Should use DIV_ROUND_CLOSEST() like the Linux driver.

Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko at socionext.com>
---
 drivers/serial/serial_zynq.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/serial/serial_zynq.c b/drivers/serial/serial_zynq.c
index 83adfb5fb98a..857c570c5836 100644
--- a/drivers/serial/serial_zynq.c
+++ b/drivers/serial/serial_zynq.c
@@ -75,7 +75,7 @@ static void _uart_zynq_serial_setbrg(struct uart_zynq *regs,
 	 * Find acceptable values for baud generation.
 	 */
 	for (bdiv = 4; bdiv < 255; bdiv++) {
-		bgen = clock / (baud * (bdiv + 1));
+		bgen = DIV_ROUND_CLOSEST(clock, (baud * (bdiv + 1)));
 		if (bgen < 2 || bgen > 65535)
 			continue;
 
-- 
2.7.4