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

From: Jassi Brar
Date: Tue Jun 15 2010 - 07:45:42 EST

On Tue, Jun 15, 2010 at 8:17 PM, Maurus Cuelenaere
<mcuelenaere@xxxxxxxxx> wrote:
> Op 15-06-10 12:45, Jassi Brar schreef:
>> On Tue, Jun 15, 2010 at 7:25 PM, Kukjin Kim <> 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@xxxxxxx>
>>>> Cc: Ben Dooks <ben-linux@xxxxxxxxx>
>>>> Cc: Kukjin Kim <>
>>> 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.
I don't particularly like the idea of making Samsung's drivers use the DMA API.
IMHO the S3C dma api is better atm.
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