From: Lucas Stach <l.stach@pengutronix.de>
Date: Thu, 30 May 2013 13:47:04 +0000 (+0200)
Subject: serial/imx: disable hardware flow control at startup
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=bff09b099b31a31573b3c5943f805f6a08c714f0;p=linux-beck.git

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>
---

diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index 147c9e193595..8cdfbd365892 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)) {