[PATCH v19 1/4] dt-bindings: i2c: Split AST2600 binding into a new YAML

[Rob Herring (Arm)]

On Mon, 20 Oct 2025 09:31:57 +0800, Ryan Chen wrote:
> The AST2600 I2C controller is a new hardware design compared to the
> I2C controllers in previous ASPEED SoCs (e.g., AST2400, AST2500).
> 
> It introduces new features such as:
>  - A redesigned register layout
>  - Separation between controller and target mode registers
>  - Transfer mode selection (byte, buffer, DMA)
>  - Support for a shared global register block for configuration
> 
> Due to these fundamental differences, maintaining a separate
> devicetree binding file for AST2600 helps to clearly distinguish
> the hardware capabilities and configuration options from the older
> controllers.
> 
> Signed-off-by: Ryan Chen <ryan_chen at aspeedtech.com>
> ---
>  .../devicetree/bindings/i2c/aspeed,i2c.yaml   |  3 +-
>  .../devicetree/bindings/i2c/ast2600-i2c.yaml  | 67 +++++++++++++++++++
>  2 files changed, 68 insertions(+), 2 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/i2c/ast2600-i2c.yaml
> 

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/i2c/ast2600-i2c.yaml: warning: ignoring duplicate '$id' value 'http://devicetree.org/schemas/i2c/aspeed,i2c.yaml#'
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/i2c/ast2600-i2c.yaml: properties:reg: {'minItems': 1, 'maxItems': 2, 'items': [{'description': 'address offset and range of bus'}, {'description': 'address offset and range of bus buffer'}]} should not be valid under {'required': ['maxItems']}
	hint: "maxItems" is not needed with an "items" list
	from schema $id: http://devicetree.org/meta-schemas/items.yaml#
/builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/i2c/ast2600-i2c.yaml: $id: Cannot determine base path from $id, relative path/filename doesn't match actual path or filename
 	 $id: http://devicetree.org/schemas/i2c/aspeed,i2c.yaml
 	file: /builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/i2c/ast2600-i2c.yaml
Documentation/devicetree/bindings/i2c/ast2600-i2c.example.dtb: /example-0/i2c at 40: failed to match any schema with compatible: ['aspeed,ast2600-i2c-bus']

doc reference errors (make refcheckdocs):

See https://patchwork.ozlabs.org/project/devicetree-bindings/patch/20251020013200.1858325-2-ryan_chen@aspeedtech.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.