linux-kernel - Re: [PATCH v8 0/2] Add support for the Allwinner A31 DMA Controller

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Date:	Wed, 21 May 2014 17:55:51 +0200
From:	Maxime Ripard <maxime.ripard@...e-electrons.com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Dan Williams <dan.j.williams@...el.com>,
	Vinod Koul <vinod.koul@...el.com>,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	dmaengine@...r.kernel.org, linux-sunxi@...glegroups.com,
	kevin.z.m.zh@...il.com, sunny@...winnertech.com,
	shuge@...winnertech.com, zhuzhenhua@...winnertech.com,
	andriy.shevchenko@...el.com
Subject: Re: [PATCH v8 0/2] Add support for the Allwinner A31 DMA Controller

On Wed, May 21, 2014 at 05:23:41PM +0200, Arnd Bergmann wrote:
> On Wednesday 21 May 2014 17:15:54 Maxime Ripard wrote:
> > Changes from v7:
> >   - select DMA_OF, since we're only relying on DT
> > 
> 
> I missed the discussion about this issue, but it seems wrong to me.
> DMA_OF is currently enabled if we have both DMAENGINE and OF turned on.
> 
> If OF is disabled but DMA_OF gets selected by DMA_SUN6I, what happens?

Is that even possible with a multiplatform-based platform?

Maxime

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

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