[PATCH v2 4/7] of: address: Add support for the dma-parent property

[Rob Herring]

On Wed, Feb 6, 2019 at 1:42 PM Maxime Ripard <maxime.ripard at bootlin.com> wrote:
>
> Some SoCs have devices that are using a separate bus from the main bus to
> perform DMA.
>
> These buses might have some restrictions and/or different mapping than from
> the CPU side, so we'd need to express those using the usual dma-ranges, but
> using a different DT node than the node's parent.
>
> Add support for a dma-parent property that links to the DMA bus used by the
> device in such a case.

?? dma-parent is gone now, right? And I see #dma-parent-cells?

Rob