Re: [PATCH v7 01/10] ARM: davinci: move private EDMA API to arm/common

[Sergei Shtylyov]

Hello.

On 01-02-2013 22:59, Matt Porter wrote:

> > > > > Move mach-davinci/dma.c to common/edma.c so it can be used
> > > > > by OMAP (specifically AM33xx) as well.

> > > > I think this should rather go to drivers/dma/?

> > > No, this is the private EDMA API. It's the analogous thing to
> > > the private OMAP dma API that is in plat-omap/dma.c. The actual
> > > dmaengine driver is in drivers/dma/edma.c as a wrapper around
> > > this...same way OMAP DMA engine conversion is being done.

> >    Keeps me wondering why we couldn't have the same with CPPI 4.1 when I proposed
> > that, instead of waiting indefinitely for TI to convert it to drivers/dma/
> > directly. We could have working MUSB DMA on OMAP-L1x/Sitara all this time... Sigh.

> That is a shame. Yeah, I've pointed out that I was doing this exactly
> the same way as was acceptable for the OMAP DMA conversion since it was
> in RFC. The reasons are sound since in both cases, we have many drivers
> to convert that need to continue using the private DMA APIs.

   In case of CPPI 4.1, we'd only have to convert MUSB DMA driver. Other 
in-tree CPPI 4.1 having SoCs don't use it for anything but MUSB -- it even is 
sub-block of their MUSB device, AFAIK (I maybe wrong about Sitaras -- I don't 
know them well).

> -Matt

WBR, Sergei

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