Re: [PATCH v2] dt-bindings: dma: xilinx: Add power-domains to xlnx,zynqmp-dpdma

[Michal Simek]

Hi,

On 5/3/23 14:51, Laurent Pinchart wrote:
> Hi Michal,
>
> Thank you for the patch.
>
> On Wed, May 03, 2023 at 10:00:20AM +0200, Michal Simek wrote:
> > DP DMA has own power domain that's why describe optional power-domain
> > property.
>
> As far as I understand, the property should always be specified, the
> only reason why it's not mandatory is backward-compatibility (I would
> make it mandatory, as I think proper validation of new DT is more
> important than avoiding breaking validation - but not operation! - of
> old DT, but that's a separate story). If my understanding is correct,
> could you please update the example in the bindings to add the
> power-domains property ?

backward compatible - of course
always specified - if pd driver is enabled it must be there. If not it doesn't 
do anything - just describes it.

I am not in a position to decide this. But if dt folks agree with your ask I am 
happy to make it mandatory and extend example.

M