Re: [PATCH] dt-bindings: mmc: brcm,iproc-sdhci: allow dma-coherent property

[Krzysztof Kozlowski]

On Fri, Mar 06, 2026 at 08:47:03AM +0900, Lee Yongjun wrote:
> The Broadcom iProc SDHCI controller supports DMA, but its binding
> schema does not allow the 'dma-coherent' property.
> 
> As a result, dtbs_check reports the following validation errors
> on the Northstar2 SoC:
> 
>   mmc@66420000 (brcm,sdhci-iproc-cygnus): Unevaluated properties
>   are not allowed ('dma-coherent' was unexpected)
>   mmc@66430000 (brcm,sdhci-iproc-cygnus): Unevaluated properties
>   are not allowed ('dma-coherent' was unexpected)
> 
> Allow the 'dma-coherent' property in the schema to fix the validation
> errors and accurately reflect the hardware capability.

So is the hardware capable of coherent DMA or not? Entire commit msg is
silent about this and says how you fix warning without actually telling
us that it is a correct fix.

Best regards,
Krzysztof