[PATCH] dt-bindings: PCI: mediatek-gen3: Allow memory-region for restricted DMA buffer

[AngeloGioacchino Del Regno]

On 5/8/26 08:36, Chen-Yu Tsai wrote:
> On some SoCs without an IOMMU behind the PCIe controller, the PCIe
> controller memory access could be limited to a small region by the
> firmware configuring a memory protection unit. This memory region
> must be assigned to the PCIe controller so that the OS knows to
> use that region. Otherwise PCIe devices would not work properly.
> 
> Allow the memory-region property with one item pointing to a
> restricted DMA buffer.
> 
> Signed-off-by: Chen-Yu Tsai <wenst at chromium.org>

Makes a lot of sense, and actually makes us able to provide a correct hardware
description in the devicetrees.

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>