[PATCH 4/8] imx: serial: be sure to stop xmit upon shutdown

["Oskar Schirmer" <os@emlix.com>]

From: Fabian Godehardt <fg@emlix.com>

needed to avoid continued transmission by hardware
while software already shuts down, which might
cause dangling characters to show up in hardware
queues when restarting the device.

Signed-off-by: Fabian Godehardt <fg@emlix.com>
Signed-off-by: Oskar Schirmer <os@emlix.com>
---
 drivers/serial/imx.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/drivers/serial/imx.c b/drivers/serial/imx.c
index afcec9e..3fa07a9 100644
--- a/drivers/serial/imx.c
+++ b/drivers/serial/imx.c
@@ -634,6 +634,10 @@ static void imx_shutdown(struct uart_port *port)
 	struct imx_port *sport = (struct imx_port *)port;
 	unsigned long temp;
 
+	temp = readl(sport->port.membase + UCR2);
+	temp &= ~(UCR2_TXEN);
+	writel(temp, sport->port.membase + UCR2);
+
 	/*
 	 * Stop our timer.
 	 */
-- 
1.5.3.7