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

[Linus Walleij]

2011/2/1 Russell King - ARM Linux <linux at arm.linux.org.uk>:

> So, the solutions as I see it are:
>
> 1. If DMAREQCTL = 1, move the burst limiting work-around into the DMA
>   engine driver, if it really is a problem.
>
> 2. Set DMAREQCTL = 0.
>
> (2) seems to be the most sane solution to me.

Let's go with that as indicated in other mail.

However the DMAREQCTL is an odd beast and I just cannot
wrap my head around it. It certainly isn't there to solve any
software problems, so I need to find some usecase for it.

Generating SDIO traffic with odd bytechunks isn't that easy
though.

Linus Walleij