DMA range support on BCM283x

[Dave Stevenson]

On Thu, 14 Mar 2024 at 13:47, Mark Brown <broonie at kernel.org> wrote:
>
> On Fri, Mar 08, 2024 at 03:06:01PM +0000, Dave Stevenson wrote:
>
> > Assuming I'm correct with the above, the question is how to implement
> > a solution that corrects the behaviour whilst still supporting the old
> > DT, and preferably isn't spread far and wide through the code.
> > Worst case is to require all DMA users and the DMA controller to look
> > for the dma-ranges property, observe the range isn't present, and drop
> > back to the current behaviour.
> > Slightly nicer is to use the knowledge that "ranges" and "dma-ranges"
> > in this case should be identical, so have the DMA controller driver
> > attempt a lookup with "ranges" if "dma-ranges" fails.
>
> Either of those solutions seems fine to me.

Thanks Mark.
At least I know I'm not wasting my time trying to implement either of those.

  Dave