On Mon, Nov 25, 2013 at 2:30 PM, Stephen Warren [off-list ref] wrote:

On 11/25/2013 03:09 PM, Arnd Bergmann wrote:

quoted

On Monday 25 November 2013 14:53:36 Stephen Warren wrote:

quoted

v2: Use of_dma_slave_xlate() rather than of_dma_simple_xlate(), as
    suggested by Arnd Bergmann.

This patch is part of a series with strong internal depdendencies. I'm
looking for an ack so that I can take the entire series through the Tegra
and arm-soc trees. The series will be part of a stable branch that can be
merged into other subsystems if needed to avoid/resolve dependencies.

Did I suggest of_dma_slave_xlate()? I don't think I've actually heard
of that function, and I can't find anything in the kernel source or
using google.

Why not just use an open-coded xlate function?

Well, you suggested not using of_dma_simple_xlate() since it wasn't
appropriate. I then started to implement an open-coded xlate function,
but found that it was 99% identical to the same thing in the mmp driver,
and hence created a common of_dma_slave_xlate() so as not to just
cut/paste it everywhere. Unfortunately, I only sent that patch to
dmaengine at vger.kernel.org and the DMA maintainers, and there's no
archive of that list:-(

There is, however, an archive of the patches:

dma: add common of_dma_slave_xlate()
https://patchwork.kernel.org/patch/3234751/

dma: mmp_pdma: use of_dma_slave_xlate()
https://patchwork.kernel.org/patch/3234761/

..btw I think we should squash those two together.