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Message-ID: <D415CD2EC4182C4EAB90A76B7D9F16DC022B0A8C5E@EX-DAG02.eckelmann.group>
Date:   Mon, 24 Jul 2017 11:49:28 +0000
From:   "Schenk, Gavin" <G.Schenk@...elmann.de>
To:     Fabio Estevam <festevam@...il.com>
CC:     Clemens Gruber <clemens.gruber@...ruber.com>,
        "linux-serial@...r.kernel.org" <linux-serial@...r.kernel.org>,
        "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>,
        "u.kleine-koenig@...gutronix.de" <u.kleine-koenig@...gutronix.de>,
        Fabio Estevam <fabio.estevam@....com>,
        "Ian Jamison" <ian.dev@...ver.com>
Subject: AW: [PATCH] serial: imx: disable DMA for RS-485 on i.MX6 SMP

Hi,

sorry for the delay!

> > Uwe Kleine-König had the idea to disable DMA on the i.MX6dl based
> platform via dts and this is our current workaround.
> 
> Please test Ian's patch:
> http://marc.info/?l=linux-serial&m=150005865213531&w=2
> 
> It should fix this DMA problem with RS485.

With this patch applied my test works fine on i.MX6dl in RS485-mode and DMA enabled.
 
Regards
Gavin Schenk



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