* [PATCH] dt-bindings: dma: snps,dw-axi-dmac: Allow devices to be marked as noncoherent
@ 2025-03-03 6:56 Inochi Amaoto
2025-03-03 16:31 ` Conor Dooley
2025-03-10 21:06 ` Vinod Koul
0 siblings, 2 replies; 3+ messages in thread
From: Inochi Amaoto @ 2025-03-03 6:56 UTC (permalink / raw)
To: Eugeniy Paltsev, Vinod Koul, Rob Herring, Krzysztof Kozlowski,
Conor Dooley
Cc: Inochi Amaoto, dmaengine, devicetree, linux-kernel, Yixun Lan,
Longbin Li
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@gmail.com>
---
Related discussion for this property.
https://lore.kernel.org/all/20250221013758.370936-1-inochiama@gmail.com/
---
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
+
resets:
minItems: 1
maxItems: 2
--
2.48.1
^ permalink raw reply related [flat|nested] 3+ messages in thread* Re: [PATCH] dt-bindings: dma: snps,dw-axi-dmac: Allow devices to be marked as noncoherent
2025-03-03 6:56 [PATCH] dt-bindings: dma: snps,dw-axi-dmac: Allow devices to be marked as noncoherent Inochi Amaoto
@ 2025-03-03 16:31 ` Conor Dooley
2025-03-10 21:06 ` Vinod Koul
1 sibling, 0 replies; 3+ messages in thread
From: Conor Dooley @ 2025-03-03 16:31 UTC (permalink / raw)
To: Inochi Amaoto
Cc: Eugeniy Paltsev, Vinod Koul, Rob Herring, Krzysztof Kozlowski,
Conor Dooley, dmaengine, devicetree, linux-kernel, Yixun Lan,
Longbin Li
[-- Attachment #1: Type: text/plain, Size: 1370 bytes --]
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@gmail.com>
> ---
> Related discussion for this property.
>
> https://lore.kernel.org/all/20250221013758.370936-1-inochiama@gmail.com/
> ---
> 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@microchip.com>
> +
> resets:
> minItems: 1
> maxItems: 2
> --
> 2.48.1
>
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] dt-bindings: dma: snps,dw-axi-dmac: Allow devices to be marked as noncoherent
2025-03-03 6:56 [PATCH] dt-bindings: dma: snps,dw-axi-dmac: Allow devices to be marked as noncoherent Inochi Amaoto
2025-03-03 16:31 ` Conor Dooley
@ 2025-03-10 21:06 ` Vinod Koul
1 sibling, 0 replies; 3+ messages in thread
From: Vinod Koul @ 2025-03-10 21:06 UTC (permalink / raw)
To: Eugeniy Paltsev, Rob Herring, Krzysztof Kozlowski, Conor Dooley,
Inochi Amaoto
Cc: dmaengine, devicetree, linux-kernel, Yixun Lan, Longbin Li
On Mon, 03 Mar 2025 14:56:48 +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.
>
> [...]
Applied, thanks!
[1/1] dt-bindings: dma: snps,dw-axi-dmac: Allow devices to be marked as noncoherent
commit: 6ec29d4086ed8b951fa794ac6c0e7cd7ae3762d9
Best regards,
--
~Vinod
^ permalink raw reply [flat|nested] 3+ messages in thread
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2025-03-03 6:56 [PATCH] dt-bindings: dma: snps,dw-axi-dmac: Allow devices to be marked as noncoherent Inochi Amaoto
2025-03-03 16:31 ` Conor Dooley
2025-03-10 21:06 ` Vinod Koul
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