[PATCH v7 01/10] ARM: davinci: move private EDMA API to arm/common
sshtylyov at mvista.com
Fri Feb 1 15:49:11 EST 2013
On 02/01/2013 09:58 PM, Felipe Balbi 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.
> good point, do you wanna send some patches ?
I have already sent them countless times and even stuck CPPI 4.1 support (in
arch/arm/common/cppi41.c) in Russell's patch system. TI requested to remove the
> I guess to make the MUSB side simpler we would need musb-dma-engine glue
> to map dmaengine to the private MUSB API. Then we would have some
> starting point to also move inventra (and anybody else) to dmaengine
Why? Inventra is a dedicated device's private DMA controller, why make
universal DMA driver for it?
> Once that's done, we drop MUSB's private API.
Don't think it's a good idea.
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