Re: [PATCH 1/2] dt-bindings: usb: Add Rockchip RK3568 compatible for EHCI and OHCI

["Diederik de Haas" <diederik@cknow-tech.com>]

Hi Jonas,

On Tue Jun 9, 2026 at 5:41 PM CEST, Jonas Karlman wrote:
> The Rockchip RK3568 EHCI/OHCI controller depends on clk_usbphy1_480m
> being enabled, or the system may freeze when registers are accessed.
>
> Add Rockchip RK3568 EHCI and OHCI compatibles with a similar four-clock
> constraint as RK3588.
>
> Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
> ---
> Existing DTs for RK3568 use the plain generic-ehci/ohci compatible,
> next patch make use of these new compatibles and adds the missing
> clk_usbphy1_480m clock references.
> ---
>  .../devicetree/bindings/usb/generic-ehci.yaml          | 10 ++++++++++
>  .../devicetree/bindings/usb/generic-ohci.yaml          |  5 ++++-
>  2 files changed, 14 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/devicetree/bindings/usb/generic-ehci.yaml b/Documentation/devicetree/bindings/usb/generic-ehci.yaml
> index 55a5aa7d7a54..c49a1bbc8cfd 100644
> --- a/Documentation/devicetree/bindings/usb/generic-ehci.yaml
> +++ b/Documentation/devicetree/bindings/usb/generic-ehci.yaml
> @@ -52,6 +52,7 @@ properties:
>                - ibm,476gtr-ehci
>                - nxp,lpc1850-ehci
>                - qca,ar7100-ehci
> +              - rockchip,rk3568-ehci
>                - rockchip,rk3588-ehci
>                - snps,hsdk-v1.0-ehci
>                - socionext,uniphier-ehci
> @@ -186,6 +187,15 @@ allOf:
>        required:
>          - clocks
>          - clock-names
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: rockchip,rk3568-ehci
> +    then:
> +      properties:
> +        clocks:
> +          minItems: 4

I think that the constraint for rk3588 is this:
- minItems: 1
- maxItems: 4

Like ~ every other compatible; there's no 'branch' for rk3588-ehci.

That's different from what you add for rk3568. Is that deliberate?
Because from the commit message I assumed they should be the same.

>  unevaluatedProperties: false
>  
> diff --git a/Documentation/devicetree/bindings/usb/generic-ohci.yaml b/Documentation/devicetree/bindings/usb/generic-ohci.yaml
> index d42f448fa204..5f1b4d2bff89 100644
> --- a/Documentation/devicetree/bindings/usb/generic-ohci.yaml
> +++ b/Documentation/devicetree/bindings/usb/generic-ohci.yaml
> @@ -47,6 +47,7 @@ properties:
>                - hpe,gxp-ohci
>                - ibm,476gtr-ohci
>                - ingenic,jz4740-ohci
> +              - rockchip,rk3568-ohci
>                - rockchip,rk3588-ohci
>                - snps,hsdk-v1.0-ohci
>            - const: generic-ohci
> @@ -198,7 +199,9 @@ allOf:
>        properties:
>          compatible:
>            contains:
> -            const: rockchip,rk3588-ohci
> +            enum:
> +              - rockchip,rk3568-ohci
> +              - rockchip,rk3588-ohci

Here they clearly do have the same constraint.

Cheers,
  Diederik

>      then:
>        properties:
>          clocks: