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Date: Sat, 7 Jan 2017 16:34:34 +0100
From: Clemens Gruber <clemens.gruber@pqgruber.com>
To: Fabio Estevam <festevam@gmail.com>
Cc: linux-serial@vger.kernel.org,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
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        Nandor Han <nandor.han@ge.com>, Lucas Stach <l.stach@pengutronix.de>,
        Fabio Estevam <fabio.estevam@freescale.com>,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: Re: imx: RS-485 problems during TX, maybe DMA related
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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?

Regards,
Clemens