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Date: Fri, 31 Oct 2014 17:36:35 +0100 From: Matthias Brugger <matthias.bgg@...il.com> To: gregkh@...uxfoundation.org Cc: linux-kernel@...r.kernel.org, jslaby@...e.cz, alan@...ux.intel.com, matthias.bgg@...il.com, heiko@...ech.de, yingjoe.chen@...il.com, ibanezchen@...il.com, linux-serial@...r.kernel.org, linux-arm-kernel@...ts.infradead.org Subject: [PATCH RESEND] tty: serial: 8250_mtk: Fix quot calculation From: Matthias Brugger <matthias.bgg@...il.com> 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 <matthias.bgg@...il.com> --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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