[PATCH v5 1/3] ARM: add CPPI 4.1 DMA support

[Sergei Shtylyov]

Hello.

Felipe Balbi wrote:

> On Tue, Jan 04, 2011 at 11:41:05PM +0800, Ming Lei wrote:
>> OMAP GPIOs have many usages or use cases, so we can use gpiolib
>> to simplify access to GPIOs.  If GPIOs has only one usage or use case,
>> it is not necessary to access GPIOs by gpiolib.

>> Now this kind of DMA controllers are only used by MUSB or only for
>> MUSB, so it doesn't matter to access them by dmaengine or not.

> Not entirely true. TUSB uses OMAP system DMA and AFAICT CPPI is used
> also for ethernet.

    Yes, but the CPPI registers are not compatible between MUSB and EMAC, only 
the descriptors are, AFAIK.

WBR, Sergei