Re: [PATCH v2 2/2] dt-bindings: spi: ti,davinci-spi: convert to DT schema

[sashiko-bot@kernel.org]

Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
- [Medium] Schema validation conditional uses `const` instead of `contains: const`, bypassing requirements for compatible string arrays.
--

--- Patch [2]: [PATCH v2 2/2] dt-bindings: spi: ti,davinci-spi: convert to DT schema ---
commit d0abc65d99912b6ce06eea7206590c61cb52b6de
Author: Bhargav Joshi <j.bhargav.u@gmail.com>

dt-bindings: spi: ti,davinci-spi: convert to DT schema

This commit converts the TI DaVinci/Keystone SPI controller binding from text
format to DT schema. It creates a separate schema for peripheral properties,
adds missing DMA properties, and introduces constraints to the ti,spi-wdelay
property.

> diff --git a/Documentation/devicetree/bindings/spi/ti,davinci-spi.yaml b/Documentation/devicetree/bindings/spi/ti,davinci-spi.yaml
> new file mode 100644
> index 0000000000000..b685082de721c
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/spi/ti,davinci-spi.yaml

[ ... ]

> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - clocks
> +  - ti,davinci-spi-intr-line
> +
> +allOf:
> +  - $ref: spi-controller.yaml#
> +  - if:
> +      properties:
> +        compatible:
> +          const: ti,keystone-spi

[Severity: Medium]
Should this use contains: const instead of just const?

Because dt-schema evaluates this strictly based on JSON Schema rules, an array
value will not match the scalar const. As a result, when the compatible
property is an array, this conditional is bypassed.

This allows device tree configurations to silently pass dt_binding_check even
if they erroneously omit the mandatory power-domains property.

> +    then:
> +      required:
> +        - power-domains
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    spi@20bf0000 {
> +        compatible = "ti,keystone-spi","ti,dm6441-spi";
> +        reg = <0x20bf0000 0x1000>;
> +        num-cs = <4>;
> +        ti,davinci-spi-intr-line = <0>;
> +        interrupts = <338>;
> +        clocks = <&clkspi>;
> +        #address-cells = <1>;
> +        #size-cells = <0>;

Does the lack of contains: const explain why this example passes validation
despite omitting the power-domains property?

[ ... ]

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260816-ti-davinci-spi-v2-0-6c6f5171422b@gmail.com?part=2