Re: [PATCH v3] dt-bindings: dma: qcom,bam-dma: Allow memory-region property

[Rob Herring]

On Wed, Oct 21, 2026 at 11:22:35AM +0530, Vishnu Santhosh wrote:
> Some Qualcomm SoCs, such as Shikra, run the modem in a separate security
> domain, preventing it from accessing BAM descriptor FIFOs allocated from
> arbitrary host memory.
> 
> Add an optional memory-region property to constrain DMA allocations made
> by the BAM DMA controller to a restricted DMA pool. Access permissions
> for the remote execution environment are managed separately.

dma-ranges is normally how address restrictions for a device are 
defined. Why can't that be used here?

Rob