[PATCH] ARM: add PrimeCell generic DMA to MMCI/PL180

[Russell King - ARM Linux]

On Mon, Jan 24, 2011 at 10:06:53PM +0100, Linus Walleij wrote:
> This was an addition from Per Forlin, IIRC the requirement
> to not push more than one word at the time into the FIFO
> below a certain threadhold is a requirement for the MMCI,
> not the DMA engine.

The MMCI has four DMA request signals:
- BREQ (burst request)
- SREQ (single request)
- LBREQ (last burst request)
- LSREQ (last single request)