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).
Well, it's pretty clear to me now that there's good reason for it not
landing in arch/arm/ so the obvious path is to do the dmaengine
conversion and put it in drivers/dma/ if it's really a generic dma engine.
I'm not sure why you express concern over the dma engine api not fitting
with CPPI 4.1?
If it doesn't work, work with Vinod to fix the api. It's
expected, I'm working on dmaengine API changes right now to deal with a
limitation of EDMA that needs to be abstracted.
As pointed out, edma.c is already here in arch/arm/, so moving it doesn't
add something new. It does let us regression test all platforms that use it
(both Davinci and AM33xx) as I go through the conversion process.
-Matt