linux-kernel - Re: [PATCH v2 2/2] dt-bindings: dma: adi,axi-dmac: deprecate adi,channels node

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Message-ID: <28e6bf79-eac0-4ab2-8505-3d210cf145a9@baylibre.com>
Date: Tue, 29 Oct 2024 16:00:03 -0500
From: David Lechner <dlechner@...libre.com>
To: "Rob Herring (Arm)" <robh@...nel.org>
Cc: linux-kernel@...r.kernel.org, dmaengine@...r.kernel.org,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Vinod Koul <vkoul@...nel.org>,
 devicetree@...r.kernel.org, Lars-Peter Clausen <lars@...afoo.de>,
 Nuno Sa <nuno.sa@...log.com>
Subject: Re: [PATCH v2 2/2] dt-bindings: dma: adi,axi-dmac: deprecate
 adi,channels node

On 10/29/24 3:42 PM, Rob Herring (Arm) wrote:
> 
> On Tue, 29 Oct 2024 14:29:15 -0500, David Lechner wrote:
>> Deprecate the adi,channels node in the adi,axi-dmac binding. Prior to
>> IP version 4.3.a, this information was required. Since then, there are
>> memory-mapped registers that can be read to get the same information.
>>
>> Acked-by: Nuno Sa <nuno.sa@...log.com>
>> Signed-off-by: David Lechner <dlechner@...libre.com>
>> ---
>>
>> For context, the adi,channels node has not been required in the Linux
>> kernel since [1].
>>
>> [1]: https://lore.kernel.org/all/20200825151950.57605-7-alexandru.ardelean@analog.com/
>> ---
>>  .../devicetree/bindings/dma/adi,axi-dmac.yaml         | 19 +++++--------------
>>  1 file changed, 5 insertions(+), 14 deletions(-)
>>
> 
> My bot found errors running 'make dt_binding_check' on your patch:
> 
> yamllint warnings/errors:
> 
> dtschema/dtc warnings/errors:
> /builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/dma/adi,axi-dmac.example.dtb: dma-controller@...20000: 'adi,channels' is a required property
> 	from schema $id: http://devicetree.org/schemas/dma/adi,axi-dmac.yaml#
> 
> doc reference errors (make refcheckdocs):
> 
> See https://patchwork.ozlabs.org/project/devicetree-bindings/patch/20241029-axi-dma-dt-yaml-v2-2-52a6ec7df251@baylibre.com
> 
> The base for the series is generally the latest rc1. A different dependency
> should be noted in *this* patch.
> 
> If you already ran 'make dt_binding_check' and didn't see the above
> error(s), then make sure 'yamllint' is installed and dt-schema is up to
> date:
> 
> pip3 install dtschema --upgrade
> 
> Please check and re-submit after running the above command yourself. Note
> that DT_SCHEMA_FILES can be set to your schema file to speed up checking
> your schema. However, it must be unset to test all examples with your schema.
> 

Ugh, somehow lost a line from v1 in the rebase and didn't notice.

This is the part missing from this patch:

@@ -109,7 +113,6 @@ required:
   - interrupts
   - clocks
   - "#dma-cells"
-  - adi,channels
 
 additionalProperties: false
 

Will wait a bit for other feedback and then send a fixed version.