linux-kernel - Re: [PATCH v5 1/3] ARM: add CPPI 4.1 DMA support

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Message-ID: <4CA1BFBF.2090102@mvista.com>
Date:	Tue, 28 Sep 2010 14:13:19 +0400
From:	Sergei Shtylyov <sshtylyov@...sta.com>
To:	Linus Walleij <linus.ml.walleij@...il.com>
CC:	Sergei Shtylyov <sshtylyov@...mvista.com>,
	linux-arm-kernel@...ts.infradead.org,
	davinci-linux-open-source@...ux.davincidsp.com,
	khilman@...prootsystems.com, linux@....linux.org.uk,
	linux kernel <linux-kernel@...r.kernel.org>,
	Dan Williams <dan.j.williams@...el.com>
Subject: Re: [PATCH v5 1/3] ARM: add CPPI 4.1 DMA support

Hello.

On 28-09-2010 13:13, Linus Walleij wrote:

>> Add support for Texas Instuments Communication Port Programming Interface 4.1
>> (CPPI 4.1) used on OMAP-L1x/DA8xx and AM35x.

> Sorry for late feedback ...

>> +++ linux-davinci/arch/arm/common/cppi41.c

> Can you migrate this driver to drivers/dma/cppi41.c and use the
> DMAengine interface like so many DMA drivers we have created
> recently, or is there some very special characteristics about this
> DMA controller meriting it to be placed in arch/arm/*?

    I have once studied the possibility of doing this driver under 
drivers/dma/, and found that hardly achievable. Maybe I should try again though...

> Yours,
> Linus Walleij

WBR, Sergei
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