linux-kernel - Re: [PATCH v2] spi: s3c64xx: move to generic dmaengine API

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Message-ID: <20130417144637.GW13687@opensource.wolfsonmicro.com>
Date:	Wed, 17 Apr 2013 15:46:37 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Kukjin Kim <kgene.kim@...sung.com>,
	linux-samsung-soc@...r.kernel.org,
	spi-devel-general@...ts.sourceforge.net,
	Grant Likely <grant.likely@...retlab.ca>,
	Padma Venkat <padma.kvr@...il.com>
Subject: Re: [PATCH v2] spi: s3c64xx: move to generic dmaengine API

On Thu, Apr 11, 2013 at 10:42:03PM +0200, Arnd Bergmann wrote:
> The spi-s3c64xx uses a Samsung proprietary interface for
> talking to the DMA engine, which does not work with
> multiplatform kernels.

Actually it seems that this patch is causing issues for bulk SPI
transfers on s3c64xx, especially when they're driven quickly one after
another.  I've only just found the problem so I've not been able to
debug yet but a revert fixes it...

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