From: matthias.bgg@gmail.com (Matthias Brugger)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH RESEND] tty: serial: 8250_mtk: Fix quot calculation
Date: Fri, 31 Oct 2014 17:36:35 +0100 [thread overview]
Message-ID: <1414773395-9916-1-git-send-email-matthias.brugger@bq.com> (raw)
From: Matthias Brugger <matthias.bgg@gmail.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@gmail.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
next reply other threads:[~2014-10-31 16:36 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-31 16:36 Matthias Brugger [this message]
2014-10-31 16:48 ` [PATCH RESEND] tty: serial: 8250_mtk: Fix quot calculation Arnd Bergmann
2014-11-03 2:27 ` eddie huang
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