From mboxrd@z Thu Jan  1 00:00:00 1970
From: festevam@gmail.com (Fabio Estevam)
Date: Sat, 7 Jan 2017 14:48:03 -0200
Subject: imx: RS-485 problems during TX, maybe DMA related
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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