[PATCH v2 1/2] dt-bindings: i3c: add Realtek RTS490x I3C HUB

[Rob Herring (Arm)]

On Mon, 25 May 2026 20:51:27 +0800, zain_zhou at realsil.com.cn wrote:
> From: Yin Zhou <zain_zhou at realsil.com.cn>
> 
> Add DT binding schema for Realtek RTS490x series I3C HUB devices.
> 
> The binding describes configuration properties for:
>   - LDO enable/disable and voltage level per port group
>   - Pull-up resistance per port group
>   - IO driver strength per port
>   - Per target-port mode (I3C/SMBus/GPIO/disabled), pull-up,
>     IO mode, SMBus clock frequency and polling interval
>   - Hub network always-I3C mode
>   - Hardware identification via CSEL pin (id) and CP1 pins (id-cp1)
> 
> Signed-off-by: Yin Zhou <zain_zhou at realsil.com.cn>
> 
> Changes in v2:
> - Rework binding per Krzysztof Kozlowski's review:
>   add realtek, vendor prefix to all custom properties; use boolean
>   for enable flags; use u32 with unit suffixes (-microvolt, -ohms)
>   for voltage/resistance; change to unevaluatedProperties: false;
>   fix title, maintainer name, description, $nodename pattern
> - Consolidate examples; add dt-bindings/i2c/i2c.h include
> ---
>  .../bindings/i3c/realtek,rts490x-i3c-hub.yaml | 263 ++++++++++++++++++
>  1 file changed, 263 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/i3c/realtek,rts490x-i3c-hub.yaml
> 

My bot found errors running 'make dt_binding_check' on your patch:

yamllint warnings/errors:

dtschema/dtc warnings/errors:
Documentation/devicetree/bindings/i3c/realtek,rts490x-i3c-hub.example.dtb: /example-0/i3c-master at d040000/hub at 70,4ba00000000/target-port at 1/i2c at 10: failed to match any schema with compatible: ['i2c-slave-mqueue']

doc reference errors (make refcheckdocs):

See https://patchwork.kernel.org/project/devicetree/patch/20260525125128.297-1-zain_zhou@realsil.com.cn

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.