From mboxrd@z Thu Jan  1 00:00:00 1970
From: Fabio Estevam <festevam@gmail.com>
Subject: Re: imx: RS-485 problems during TX, maybe DMA related
Date: Sat, 7 Jan 2017 14:48:03 -0200
Message-ID: <CAOMZO5CY3ys6moE133LwSKcS4egv56JdmhPMRG0TmAnfD+ZBAw@mail.gmail.com>
References: <20170104160024.GA13442@archie.localdomain>
 <CAOMZO5C3enuThR1DpcwNnqFdxd8tGoBwd76O62Gnviz8x1_a9w@mail.gmail.com>
 <20170106225026.GA3804@archie.localdomain>
 <CAOMZO5CywajwZEL8K2ATfS80WzqY69YVX+3S7hq9_HmNdNAwaw@mail.gmail.com>
 <20170107134557.GA12299@archie.localdomain>
 <CAOMZO5ALSQj3C6Yn-avMZdzTvtWCZPQ5+pNdzYi03G-GZB_t+w@mail.gmail.com>
 <20170107153434.GA13307@archie.localdomain>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Return-path: <linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org>
In-Reply-To: <20170107153434.GA13307@archie.localdomain>
List-Unsubscribe: <http://lists.infradead.org/mailman/options/linux-arm-kernel>,
 <mailto:linux-arm-kernel-request@lists.infradead.org?subject=unsubscribe>
List-Archive: <http://lists.infradead.org/pipermail/linux-arm-kernel/>
List-Post: <mailto:linux-arm-kernel@lists.infradead.org>
List-Help: <mailto:linux-arm-kernel-request@lists.infradead.org?subject=help>
List-Subscribe: <http://lists.infradead.org/mailman/listinfo/linux-arm-kernel>,
 <mailto:linux-arm-kernel-request@lists.infradead.org?subject=subscribe>
Sender: "linux-arm-kernel" <linux-arm-kernel-bounces@lists.infradead.org>
Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org
To: Clemens Gruber <clemens.gruber@pqgruber.com>
Cc: Fabio Estevam <fabio.estevam@freescale.com>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Sascha Hauer <s.hauer@pengutronix.de>, =?UTF-8?Q?Uwe_Kleine=2DK=C3=B6nig?= <u.kleine-koenig@pengutronix.de>, linux-kernel <linux-kernel@vger.kernel.org>, "linux-serial@vger.kernel.org" <linux-serial@vger.kernel.org>, Nandor Han <nandor.han@ge.com>, "linux-arm-kernel@lists.infradead.org" <linux-arm-kernel@lists.infradead.org>, Lucas Stach <l.stach@pengutronix.de>
List-Id: linux-serial@vger.kernel.org

On Sat, Jan 7, 2017 at 1:34 PM, Clemens Gruber
<clemens.gruber@pqgruber.com> wrote:
> Hi Fabio,
>
> On Sat, Jan 07, 2017 at 12:57:10PM -0200, Fabio Estevam wrote:
>> The MX6QDL_PAD_CSI0_DAT16__UART4_CTS_B option is only valid in dte mode.
>
> Ah, the input select is limited in that way, I see.
>
> You wrote that you tried rts-gpios.
> What about setting cts-gpios to gpio6 2 in the DT?
>
> Or can you remux RX and TX to be switched to work in dte mode?

I managed to get RS485 in half-duplex working with rts-gios. Will send
a patch shortly.

Thanks