This is a note to let you know that I've just added the patch titled
serial: imx: Fix DCD reading
to the 4.8-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
serial-imx-fix-dcd-reading.patch
and it can be found in the queue-4.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 4b75f80003617fe35771a9e27022e8fbd6a41875 Mon Sep 17 00:00:00 2001
From: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
Date: Mon, 26 Sep 2016 15:55:31 +0200
Subject: serial: imx: Fix DCD reading
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From: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
commit 4b75f80003617fe35771a9e27022e8fbd6a41875 upstream.
The USR2_DCDIN bit is tested for in register usr1. As the name
suggests the usr2 register should be used instead. This fixes
reading the Carrier detect status.
Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
Fixes: 90ebc4838666 ("serial: imx: repair and complete handshaking")
Acked-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>
Reviewed-by: Fabio Estevam <fabio.estevam@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/tty/serial/imx.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -740,12 +740,13 @@ static unsigned int imx_get_hwmctrl(stru
{
unsigned int tmp = TIOCM_DSR;
unsigned usr1 = readl(sport->port.membase + USR1);
+ unsigned usr2 = readl(sport->port.membase + USR2);
if (usr1 & USR1_RTSS)
tmp |= TIOCM_CTS;
/* in DCE mode DCDIN is always 0 */
- if (!(usr1 & USR2_DCDIN))
+ if (!(usr2 & USR2_DCDIN))
tmp |= TIOCM_CAR;
if (sport->dte_mode)
Patches currently in stable-queue which might be from s.hauer@xxxxxxxxxxxxxx are
queue-4.8/serial-imx-fix-dcd-reading.patch
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