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@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;