linux-kernel - Re: [PATCH] ARM: dts: sun8i: add NAND controller node for A23/A33

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Message-ID: <20160825205343.GJ32598@lukather>
Date:   Thu, 25 Aug 2016 22:53:43 +0200
From:   Maxime Ripard <maxime.ripard@...e-electrons.com>
To:     Icenowy Zheng <icenowy@...c.xyz>
Cc:     Boris Brezillon <boris.brezillon@...e-electrons.com>,
        Russell King <linux@...linux.org.uk>,
        Chen-Yu Tsai <wens@...e.org>, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-sunxi@...glegroups.com" <linux-sunxi@...glegroups.com>
Subject: Re: [PATCH] ARM: dts: sun8i: add NAND controller node for A23/A33

Hi,

On Wed, Aug 24, 2016 at 04:21:35PM +0800, Icenowy Zheng wrote:
> Hi Maxime,
> 
> 24.08.2016, 14:02, "Maxime Ripard" <maxime.ripard@...e-electrons.com>:
> > Hi,
> >
> > On Tue, Aug 23, 2016 at 09:55:46PM +0800, Icenowy Zheng wrote:
> >>  A23/A33 has a NAND controller which can now be used properly.
> >>
> >>  Add a device node for it.
> >>
> >>  The DMA function cannot work because of changed DMA IP block, so it's
> >>  temporarily removed in the device node. However, with PIO mode it can still
> >>  work.
> >
> > What is preventing the NAND driver to work with DMA with the sun6i driver?
>
> It seems that under sun6i we should use dedicated rx and tx DMAs, but not a
> "rxtx" DMA.

Ah, I see. I just applied your patch, thanks!
Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

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