PL-330 DMA driver

[jassi brar]

On Thu, Feb 18, 2010 at 6:53 AM, Linus Walleij
<linus.ml.walleij at gmail.com> wrote:
> 2010/2/17 Guennadi Liakhovetski <g.liakhovetski at gmx.de>:
>
>> Of course, there's also a problem of reusing peripheral drivers with
>> different DMA controllers...
>
> That's what I'm facing with MMCI and a host of other peripherals.
>
> We have to either:
>
> (1) Use something, i.e the DMA engine slave
>
> (2) Fork the driver entirely to some ste-mmci.c and delete all generic
>  code. (Repeat for each vendor using a primecell!)
>
> (3) Sprinkle mmci.c with #ifdef ARCH_U300 for our DMA engine.
>  Or, not so bad, atleast sprinkle the smallish part I have now
>  broken out in mmci.c that deals with DMA transfers.
>
> I think the current patch does (1) and it actually works, then if
> it gets burdensome to others, using a generic DMA engine can
> be a special case of (3) since that works for us so we're on the right
> path in two cases and (2) doesn't look good to me.
>
> Yours,
> Linus Walleij

CCing the S3C maintainer (Ben Dooks)  to share his opinion.