On Mon, Mar 03, 2025 at 02:56:48PM +0800, Inochi Amaoto wrote: > A RISC-V platform can have both DMA coherent/noncoherent devices. > Since the RISC-V architecture is marked coherent, devices should > be marked as noncoherent when coherent devices exist. > > Add dma-noncoherent property for snps,dw-axi-dmac device. It will > be used on SG2044, and it has other coherent devices. > > Signed-off-by: Inochi Amaoto <inochiama@xxxxxxxxx> > --- > Related discussion for this property. > > https://lore.kernel.org/all/20250221013758.370936-1-inochiama@xxxxxxxxx/ > --- > Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml b/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml > index 525f5f3932f5..935735a59afd 100644 > --- a/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml > +++ b/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml > @@ -59,6 +59,8 @@ properties: > minimum: 1 > maximum: 8 > > + dma-noncoherent: true I'd probably also add mutual exclusion, but I think that's something for dt-schema and not for individual bindings. Acked-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx> > + > resets: > minItems: 1 > maxItems: 2 > -- > 2.48.1 >
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