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imx: serial: be sure to stop xmit upon shutdown

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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>
This commit is contained in:
Fabian Godehardt 2009-06-11 14:38:38 +01:00 committed by Linus Torvalds
parent 977757311e
commit 2e1463922a
1 changed files with 4 additions and 0 deletions
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4
drivers/serial/imx.c
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@ -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.
*/