Add 'canaan,k230-usb' compatible string with 'snps,dwc2' as fallback
for the DWC2 IP which is used by Canaan K230.

Signed-off-by: Jiayu Du <jiayu.riscv@isrc.iscas.ac.cn>
---
 Documentation/devicetree/bindings/usb/dwc2.yaml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/usb/dwc2.yaml b/Documentation/devicetree/bindings/usb/dwc2.yaml
index 6c3a10991b8b..352487c6392a 100644
--- a/Documentation/devicetree/bindings/usb/dwc2.yaml
+++ b/Documentation/devicetree/bindings/usb/dwc2.yaml
@@ -17,6 +17,9 @@ properties:
   compatible:
     oneOf:
       - const: brcm,bcm2835-usb
+      - items:
+          - const: canaan,k230-usb
+          - const: snps,dwc2
       - const: hisilicon,hi6220-usb
       - const: ingenic,jz4775-otg
       - const: ingenic,jz4780-otg
-- 
2.52.0

On Thu, 15 Jan 2026 14:42:20 +0800, Jiayu Du wrote:
> Add 'canaan,k230-usb' compatible string with 'snps,dwc2' as fallback
> for the DWC2 IP which is used by Canaan K230.
> 
> Signed-off-by: Jiayu Du <jiayu.riscv@isrc.iscas.ac.cn>
> ---
>  Documentation/devicetree/bindings/usb/dwc2.yaml | 3 +++
>  1 file changed, 3 insertions(+)
> 

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/phy/canaan,k230-usb-phy.example.dtb: usb-phy@91585000 (canaan,k230-usb-phy): reg: [[0, 2438483968], [0, 1024]] is too long
	from schema $id: http://devicetree.org/schemas/phy/canaan,k230-usb-phy.yaml

doc reference errors (make refcheckdocs):

See https://patchwork.kernel.org/project/devicetree/patch/20260115064223.21926-3-jiayu.riscv@isrc.iscas.ac.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.

On Thu, Jan 15, 2026 at 02:30:03AM -0600, Rob Herring (Arm) wrote:
> 
> On Thu, 15 Jan 2026 14:42:20 +0800, Jiayu Du wrote:
> > Add 'canaan,k230-usb' compatible string with 'snps,dwc2' as fallback
> > for the DWC2 IP which is used by Canaan K230.
> > 
> > Signed-off-by: Jiayu Du <jiayu.riscv@isrc.iscas.ac.cn>
> > ---
> >  Documentation/devicetree/bindings/usb/dwc2.yaml | 3 +++
> >  1 file changed, 3 insertions(+)
> > 
> 
> 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/phy/canaan,k230-usb-phy.example.dtb: usb-phy@91585000 (canaan,k230-usb-phy): reg: [[0, 2438483968], [0, 1024]] is too long
> 	from schema $id: http://devicetree.org/schemas/phy/canaan,k230-usb-phy.yaml
> 
> doc reference errors (make refcheckdocs):
> 
> See https://patchwork.kernel.org/project/devicetree/patch/20260115064223.21926-3-jiayu.riscv@isrc.iscas.ac.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.
I will run the make dt_binding_check, and then fix it in v3.

Regards,
Jiayu Du