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SubjectRe: [PATCH 05/39] ARM: ux500: Stop passing MMC's platform data for Device Tree boots
On Wed, May 15, 2013 at 11:51 AM, Lee Jones <> wrote:

> It was required to pass DMA channel configuration information to the
> MMC driver before the new DMA API was in place. Now that it is, and
> is fully compatible with Device Tree we can stop doing that.
> Reviewed-by: Linus Walleij <>
> Signed-off-by: Lee Jones <>

So since the use of dma_request_slave_channel() is not upstream,
I guess this will break DMA use (i.e slow down transfers!) on all
device tree boots?

I'd be happy to apply it once the MMCI patch is in linux-next
indicating there may just be a window in the merge period
where it falls back to IRQ mode, but I don't want to disable
DMA on DT boots for an entire kernel cycle just like that.

Not applied as of yet.

Linus Walleij

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