linux-kernel - Re: [PATCH v3 1/3] dt-bindings: usb: add rk3588 compatible to rockchip,dwc3

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Date:   Thu, 12 Oct 2023 14:30:51 +0200
From:   Sebastian Reichel <sebastian.reichel@...labora.com>
To:     Rob Herring <robh@...nel.org>
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, kernel@...labora.com
Subject: Re: [PATCH v3 1/3] dt-bindings: usb: add rk3588 compatible to
 rockchip,dwc3

Hi,

On Tue, Oct 10, 2023 at 11:27:22AM -0500, Rob Herring wrote:
> [...]
> > +allOf:
> > +  - $ref: snps,dwc3.yaml#
> > +  - if:
> > +      properties:
> > +        compatible:
> > +          contains:
> > +            const: rockchip,rk3328-dwc3
> > +    then:
> > +      properties:
> > +        clocks:
> > +          minItems: 3
> > +          maxItems: 4
> > +        clock-names:
> > +          minItems: 3
> > +          items:
> > +            - const: ref_clk
> > +            - const: suspend_clk
> > +            - const: bus_clk
> > +            - const: grf_clk
> 
> No need to list everything again. Just:
> 
> contains:
>   const: grf_clk

No, that does not work because 'grf_clk' is optional and by using
'contains: grf_clk' the check will complain if the list does not
contain 'grf_clk'.

> [...] more improvements suggested by Rob [...]

These look all fine to me and I fixed them up for v4.

> > +        clock-names:
> > +          minItems: 3
> > +          items:
> > +            - const: ref_clk
> > +            - const: suspend_clk
> > +            - const: bus_clk
> > +            - const: utmi
> > +            - const: pipe
> 
> Again, can use 'contains' here. Where 'utmi' is in the list is already 
> defined by the top-level schema.

Same issue as above. On RK3588 there is one USB3 controller, which
needs all 5 clocks and two controllers with just the first 3 clocks.
I initially had two different compatible strings to have fixed lists,
but Krzysztof asked to use only a single one.

-- Sebastian

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