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authorLucas Stach <l.stach@pengutronix.de>2013-05-30 15:47:04 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-06-03 10:08:28 -0700
commitbff09b099b31a31573b3c5943f805f6a08c714f0 (patch)
treea8ef4347d875e786a329a61f8d3bb6b297a94cad /drivers/tty/serial
parente4aa937ec75df0eea0bee03bffa3303ad36c986b (diff)
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op-kernel-dev-bff09b099b31a31573b3c5943f805f6a08c714f0.tar.gz
serial/imx: disable hardware flow control at startup
We only want to enable hardware flow control if RTS/CTS pins are connected. Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Signed-off-by: Markus Pargmann <mpa@pengutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial')
-rw-r--r--drivers/tty/serial/imx.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index 147c9e1..8cdfbd3 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -761,6 +761,8 @@ static int imx_startup(struct uart_port *port)
temp = readl(sport->port.membase + UCR2);
temp |= (UCR2_RXEN | UCR2_TXEN);
+ if (!sport->have_rtscts)
+ temp |= UCR2_IRTS;
writel(temp, sport->port.membase + UCR2);
if (USE_IRDA(sport)) {
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