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authorFabian Godehardt <fg@emlix.com>2009-06-11 14:38:38 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-11 08:51:08 -0700
commit2e1463922a35584c863f71d4021e1e71f76eaed0 (patch)
tree5ad929468cd62126645f5b0e1d4d773344e0e5fc /drivers/serial/imx.c
parent977757311e50dc5d832c9fef34e7555411f7ccd8 (diff)
downloadblackbird-op-linux-2e1463922a35584c863f71d4021e1e71f76eaed0.tar.gz
blackbird-op-linux-2e1463922a35584c863f71d4021e1e71f76eaed0.zip
imx: serial: be sure to stop xmit upon shutdown
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> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/serial/imx.c')
-rw-r--r--drivers/serial/imx.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/serial/imx.c b/drivers/serial/imx.c
index 49f2e12ba58d..e6c2ba26dcbb 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.
*/
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