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Date: Wed, 10 Jun 2009 14:08:31 +0200 From: "Oskar Schirmer" <os@...ix.com> To: Sascha Hauer <kernel@...gutronix.de> Cc: linux-kernel@...r.kernel.org, Andrew Morton <akpm@...ux-foundation.org>, Alan Cox <alan@...rguk.ukuu.org.uk>, Oskar Schirmer <os@...ix.com>, Fabian Godehardt <fg@...ix.com> Subject: [PATCH 4/9 -v2] imx: serial: be sure to stop xmit upon shutdown From: Fabian Godehardt <fg@...ix.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@...ix.com> Signed-off-by: Oskar Schirmer <os@...ix.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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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