[PATCH] dt-bindings: mtd: cdns,hp-nfc: Add dma-coherent property

[Conor Dooley]

On Sat, Jan 31, 2026 at 11:26:11AM -0600, Dinh Nguyen wrote:
> From: Khairul Anuar Romli <khairul.anuar.romli at altera.com>
> 
> The Cadence HP NAND Flash Controller on supports DMA transactions through
> a coherent interconnect. In previous generations SoC (Stratix10 and Agilex)
> the interconnect was non-coherent, hence there is no need for dma-coherent
> property to be presence. In Agilex 5, the architecture has changed. It
> introduced a coherent interconnect that supports cache-coherent DMA.
> 
> Signed-off-by: Khairul Anuar Romli <khairul.anuar.romli at altera.com>
> Reviewed-by: Rob Herring (Arm) <robh at kernel.org>

Why does this v1 have an ack?

> Signed-off-by: Dinh Nguyen <dinguyen at kernel.org>
> ---
>  Documentation/devicetree/bindings/mtd/cdns,hp-nfc.yaml | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/mtd/cdns,hp-nfc.yaml b/Documentation/devicetree/bindings/mtd/cdns,hp-nfc.yaml
> index 73dc69cee4d8..367257a227b1 100644
> --- a/Documentation/devicetree/bindings/mtd/cdns,hp-nfc.yaml
> +++ b/Documentation/devicetree/bindings/mtd/cdns,hp-nfc.yaml
> @@ -40,6 +40,8 @@ properties:
>    dmas:
>      maxItems: 1
>  
> +  dma-coherent: true
> +
>    iommus:
>      maxItems: 1
>  
> -- 
> 2.42.0.411.g813d9a9188
> 
> 
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