linux-kernel - Re: [PATCH 06/13] DMAENGINE: driver for the ARM PL080/PL081 PrimeCells

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Message-ID: <4C176148.4020507@gmail.com>
Date:	Tue, 15 Jun 2010 13:17:28 +0200
From:	Maurus Cuelenaere <mcuelenaere@...il.com>
To:	Jassi Brar <jassisinghbrar@...il.com>
CC:	Kukjin Kim <kgene.kim@...sung.com>,
	Linus Walleij <linus.walleij@...ricsson.com>,
	Dan Williams <dan.j.williams@...el.com>,
	linux-arm-kernel@...ts.infradead.org, yuanyabin1978@...a.com,
	Viresh Kumar <viresh.kumar@...com>,
	Alessandro Rubini <rubini@...pv.it>,
	linux-kernel@...r.kernel.org, Ben Dooks <ben-linux@...ff.org>,
	Peter Pearse <peter.pearse@....com>
Subject: Re: [PATCH 06/13] DMAENGINE: driver for the ARM PL080/PL081  PrimeCells

Op 15-06-10 12:45, Jassi Brar schreef:
> On Tue, Jun 15, 2010 at 7:25 PM, Kukjin Kim <kgene.kim@...sung.com> wrote:
>> Linus Walleij wrote:
>>>
>>> This creates a DMAengine driver for the ARM PL080/PL081 PrimeCells
>>> based on the implementation earlier submitted by Peter Pearse.
>>> This is working like a charm for memcpy on the PB11MPCore, but
>>> slave DMA to devices is still not working.
>>>
>>> This DMA controller is used in mostly unmodified form in the ARM
>>> RealView and Versatile platforms, in the ST-Ericsson Nomadik, and
>>> in the ST SPEAr platform.
>>>
>>> It has been converted to use the header from the Samsung PL080
>>> derivate instead of its own defintions, and can potentially support
>>> several controllers in the same system.
>>>
>>> Cc: Peter Pearse <peter.pearse@....com>
>>> Cc: Ben Dooks <ben-linux@...ff.org>
>>> Cc: Kukjin Kim <kgene.kim@...sung.com>
>>
>> Looks good, but please give me some time to test on the board(SMDK6410).
>> If any problem, let you know. Of course no problem, will ack.
> Samsung doesn't use the DMA API, so this driver is unlikely to work.

It doesn't indeed, but it could be adapted to be a wrapper around the DMA engine API.
Or even better, the drivers could be adapted to use that API.
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