Re: [PATCH 1/7] dt-bindings: dma: ti,cppi41: Convert to DT schema

[sashiko-bot@kernel.org]

Thank you for your contribution! Sashiko AI review found 2 potential issue(s) to consider:
- [Medium] The newly added deprecated properties `#dma-channels` and `#dma-requests` lack a type reference, which will cause `dt_binding_check` to fail.
- [Medium] The `interrupts` property is strictly required by the hardware and driver but is missing from the global or variant-specific `required` lists, while `interrupt-names` is required without `interrupts`.
--

--- Patch [1]: [PATCH 1/7] dt-bindings: dma: ti,cppi41: Convert to DT schema ---
commit 9d239577372b14253a6bd9fcf116eef3c7b58ad3
Author: Bhargav Joshi <j.bhargav.u@gmail.com>

dt-bindings: dma: ti,cppi41: Convert to DT schema

Convert TI CPPI 4.1 DMA controller text bindings to DT schema. Add
ti,am3359-cppi41 and ti,da830-cppi41 into single schema since they share
the same hardware IP block and driver. Add undocumented dma-requests
and power-domains properties to match existing DTS usage.

> diff --git a/Documentation/devicetree/bindings/dma/ti/ti,cppi41.yaml b/Documentation/devicetree/bindings/dma/ti/ti,cppi41.yaml
> new file mode 100644
> index 0000000000000..110cf62c66d20
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/dma/ti/ti,cppi41.yaml
> @@ -0,0 +1,108 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/dma/ti/ti,cppi41.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#

[ ... ]

> +  power-domains:
> +    maxItems: 1
> +
> +  "#dma-channels":
> +    description: Deprecated, use dma-channels instead.
> +    deprecated: true
> +
> +  "#dma-requests":
> +    description: Deprecated, use dma-requests instead.
> +    deprecated: true

[Severity: Medium]
Do these deprecated properties need an explicit type reference, such as
$ref: /schemas/types.yaml#/definitions/uint32? Without a type reference,
will dt_binding_check fail with a missing type definition error for these
custom properties?

> +
> +required:
> +  - compatible
> +  - reg
> +  - reg-names
> +  - "#dma-cells"
> +  - dma-channels

[Severity: Medium]
Should interrupts be included in this top-level required list? Since the
hardware and driver unconditionally fail probing without it, omitting
interrupts here might allow incomplete device trees to silently pass schema
validation.

> +
> +allOf:
> +  - $ref: /schemas/dma/dma-controller.yaml#
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: ti,am3359-cppi41
> +    then:
> +      properties:
> +        reg:
> +          minItems: 4
> +        reg-names:
> +          items:
> +            - const: glue
> +            - const: controller
> +            - const: scheduler
> +            - const: queuemgr
> +        power-domains: false
> +      required:
> +        - interrupt-names
> +        - dma-requests

[Severity: Medium]
Does requiring interrupt-names here also imply that interrupts should be
required? It seems logically inconsistent to mandate the names but not the
interrupts property itself.

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260818-ti-am33-usb-v1-0-69ac5f92df45@gmail.com?part=1

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