From mboxrd@z Thu Jan 1 00:00:00 1970 From: matthias.bgg@gmail.com (Matthias Brugger) Date: Fri, 31 Oct 2014 17:36:35 +0100 Subject: [PATCH RESEND] tty: serial: 8250_mtk: Fix quot calculation Message-ID: <1414773395-9916-1-git-send-email-matthias.brugger@bq.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org From: Matthias Brugger The calculation of value quot for highspeed register set to three was wrong. This patch fixes the calculation so that the serial port for baudrates bigger then 576000 baud is working correctly. Signed-off-by: Matthias Brugger --- drivers/tty/serial/8250/8250_mtk.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tty/serial/8250/8250_mtk.c b/drivers/tty/serial/8250/8250_mtk.c index 8f37d57..de7aae5 100644 --- a/drivers/tty/serial/8250/8250_mtk.c +++ b/drivers/tty/serial/8250/8250_mtk.c @@ -81,7 +81,7 @@ mtk8250_set_termios(struct uart_port *port, struct ktermios *termios, /* Set to highest baudrate supported */ if (baud >= 1152000) baud = 921600; - quot = DIV_ROUND_CLOSEST(port->uartclk, 256 * baud); + quot = (port->uartclk / (256 * baud)) + 1; } /* -- 1.9.1