From mboxrd@z Thu Jan  1 00:00:00 1970
From: Tuomas Tynkkynen <tuomas@tuxera.com>
Date: Fri, 9 Mar 2018 18:04:15 +0200
Subject: [U-Boot] [PATCH v2 1/2] serial_bcm283x_mu: Flush RX queue after
 setting baud rate
In-Reply-To: <20180307210825.50709-2-agraf@suse.de>
References: <20180307210825.50709-1-agraf@suse.de>
 <20180307210825.50709-2-agraf@suse.de>
Message-ID: <20180309180415.752cce2a@duuni>
List-Id: <u-boot.lists.denx.de>
MIME-Version: 1.0
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
To: u-boot@lists.denx.de

On Wed, 7 Mar 2018 22:08:24 +0100
Alexander Graf <agraf@suse.de> wrote:

> After the UART was initialized, we may still have bogus data in the
> RX queue if it was enabled with incorrect pin muxing before.
>=20
> So let's flush the RX queue whenever we initialize baud rates.
>=20
> This fixes a regression with the dynamic pinmuxing code when enable_uart=
=3D1
> is not set in config.txt.
>=20
> Fixes: caf2233b28 ("bcm283x: Add pinctrl driver")
> Reported-by: G=C3=B6ran Lundberg <goran@lundberg.email>
> Reported-by: Peter Robinson <pbrobinson@gmail.com>
> Signed-off-by: Alexander Graf <agraf@suse.de>
> ---
>  drivers/serial/serial_bcm283x_mu.c | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
>=20

On a RPi 1, with no enable_uart in config.txt:

Tested-by: Tuomas Tynkkynen <tuomas@tuxera.com>