linux-kernel - Re: [PATCH v8 RESEND 1/3] dt-bindings: dmaengine: Add dma multiplexer for CV18XX/SG200X series SoC

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Message-ID:
 <IA1PR20MB49537B8C3871AE401426539CBBB02@IA1PR20MB4953.namprd20.prod.outlook.com>
Date: Tue, 30 Jul 2024 08:35:44 +0800
From: Inochi Amaoto <inochiama@...look.com>
To: Rob Herring <robh@...nel.org>, Inochi Amaoto <inochiama@...look.com>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>, 
	Albert Ou <aou@...s.berkeley.edu>, devicetree@...r.kernel.org, Palmer Dabbelt <palmer@...belt.com>, 
	Paul Walmsley <paul.walmsley@...ive.com>, linux-kernel@...r.kernel.org, 
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, dmaengine@...r.kernel.org, Conor Dooley <conor+dt@...nel.org>, 
	Liu Gui <kenneth.liu@...hgo.com>, linux-riscv@...ts.infradead.org, 
	Chen Wang <unicorn_wang@...look.com>, Vinod Koul <vkoul@...nel.org>
Subject: Re: [PATCH v8 RESEND 1/3] dt-bindings: dmaengine: Add dma
 multiplexer for CV18XX/SG200X series SoC

On Mon, Jul 29, 2024 at 10:02:01AM GMT, Rob Herring wrote:
> On Mon, Jul 29, 2024 at 08:28:09PM +0800, Inochi Amaoto wrote:
> > On Mon, Jul 29, 2024 at 11:30:20AM GMT, Krzysztof Kozlowski wrote:
> > > On 29/07/2024 09:00, Inochi Amaoto wrote:
> > > >> yamllint warnings/errors:
> > > >>
> > > >> dtschema/dtc warnings/errors:
> > > >> /builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/dma/sophgo,cv1800-dmamux.example.dtb: dma-router@154: dma-masters: 4294967295 is not of type 'array'
> > > >> 	from schema $id: http://devicetree.org/schemas/dma/sophgo,cv1800-dmamux.yaml#
> > > >> /builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/dma/sophgo,cv1800-dmamux.example.dtb: dma-router@154: dma-masters: 4294967295 is not of type 'array'
> > > >> 	from schema $id: http://devicetree.org/schemas/dma/sophgo,cv1800-dmamux.yaml#
> > > >> /builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/dma/sophgo,cv1800-dmamux.example.dtb: dma-router@154: dma-masters: 4294967295 is not of type 'array'
> > > >> 	from schema $id: http://devicetree.org/schemas/dma/dma-router.yaml#
> > > >> /builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/dma/sophgo,cv1800-dmamux.example.dtb: dma-router@154: dma-masters: 4294967295 is not of type 'array'
> > > >> 	from schema $id: http://devicetree.org/schemas/dma/dma-router.yaml#
> > > >>
> > > > 
> > > > Hi Rob,
> > > > 
> > > > Could you share some suggestions? I can not reproduce this error with
> > > > latest dtschema. I think this is more like a misreporting.
> > > 
> > > You would need dtschema from the master branch, so newer than 2024.05.
> > > 
> > > Best regards,
> > > Krzysztof
> > > 
> > 
> > Is it a must for the type array to have more than 1 element?
> > I have tested the value "<&dmac 0>" and "<&dmac>, <&dmac>".
> > Both pass the check (These value are just for test, not the
> > real hardware).
> > 
> > Setting dma-masters to type "phandle" also has no change. 
> > It do not accept the value "<&dmac>", Is there any suggestion
> > for this? Thanks in advance.
> 
> The issue is 'dma-masters' is also defined as a uint32 in the Spear 
> binding. Types aren't local to a binding, so when there's a 4 byte 
> value, is that a phandle or plain uint32? I'm working on a fix in 
> dtschema for this. It should be committed shortly.
> 
> 
> Reviewed-by: Rob Herring (Arm) <robh@...nel.org>
> 
> Rob

Thanks for the explanation.

Regards,
Inochi.