linux-kernel - Re: [PATCH 1/5] dmaengine: add ep93xx DMA support

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Message-ID: <20110526043344.GA2749@acer>
Date:	Thu, 26 May 2011 07:33:44 +0300
From:	Mika Westerberg <mika.westerberg@....fi>
To:	Linus Walleij <linus.walleij@...aro.org>
Cc:	linux-arm-kernel@...ts.infradead.org,
	Vinod Koul <vinod.koul@...el.com>,
	linux-kernel@...r.kernel.org, hsweeten@...ionengravers.com,
	ryan@...ewatersys.com, Dan Williams <dan.j.williams@...el.com>,
	Grant Likely <grant.likely@...retlab.ca>,
	spi mailing list <spi-devel-general@...ts.sourceforge.net>
Subject: Re: [PATCH 1/5] dmaengine: add ep93xx DMA support

On Wed, May 25, 2011 at 10:47:14PM +0200, Linus Walleij wrote:
> 
> > IMHO it is better to have ep93xx implementation on its own driver since it is
> > not a real AMBA PL022 peripheral but some weird hack made by Cirrus (although
> > my opinions are bit biased).
> 
> I disagree because it's IMO at first sight no more deviant than our "PL023"
> variants that still use the same pl022 driver.

Ok.

Do you think that we can go forward with this patch series if I drop the last
patch (spi/ep93xx: add DMA support)? This way we will have dmaengine
implementation in place, whatever SPI driver we choose to use with ep93xx.

We can then try to use amba-pl022 driver with ep93xx and see if it works or
not, and how much work is needed. I would like some comments from Hartley and
Ryan also.

> Is there some inexepensive hardware with EP93xx I can get to fix this
> myself?

Check for example Technologic Systems (embeddedarm.com), I have their TS-7260
board which has ep9302.
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