linux-kernel - Re: [PATCH v4 1/3] dt-bindings: usb: add rk3588 compatible to rockchip,dwc3

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Date:   Fri, 20 Oct 2023 16:36:19 +0100
From:   Conor Dooley <conor@...nel.org>
To:     Sebastian Reichel <sebastian.reichel@...labora.com>
Cc:     Heiko Stuebner <heiko@...ech.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Thinh Nguyen <Thinh.Nguyen@...opsys.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        linux-rockchip@...ts.infradead.org, linux-usb@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, kernel@...labora.com
Subject: Re: [PATCH v4 1/3] dt-bindings: usb: add rk3588 compatible to
 rockchip,dwc3

On Fri, Oct 20, 2023 at 04:11:40PM +0200, Sebastian Reichel wrote:
> RK3588 has three DWC3 controllers. Two of them are fully functional in
> host, device and OTG mode including USB2 support. They are connected to
> dedicated PHYs, that also support USB-C's DisplayPort alternate mode.
> 
> The third controller is connected to one of the combphy's shared
> with PCIe and SATA. It can only be used in host mode and does not
> support USB2. Compared to the other controllers this one needs
> some extra clocks.
> 
> While adding the extra clocks required by RK3588, I noticed grf_clk
> is not available on RK3568, so I disallowed it for that platform.
> 
> Signed-off-by: Sebastian Reichel <sebastian.reichel@...labora.com>
> ---
>  .../bindings/usb/rockchip,dwc3.yaml           | 60 +++++++++++++++++--
>  1 file changed, 55 insertions(+), 5 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/usb/rockchip,dwc3.yaml b/Documentation/devicetree/bindings/usb/rockchip,dwc3.yaml
> index 291844c8f3e1..264c2178d61d 100644
> --- a/Documentation/devicetree/bindings/usb/rockchip,dwc3.yaml
> +++ b/Documentation/devicetree/bindings/usb/rockchip,dwc3.yaml
> @@ -20,9 +20,6 @@ description:
>    Type-C PHY
>    Documentation/devicetree/bindings/phy/phy-rockchip-typec.txt
>  
> -allOf:
> -  - $ref: snps,dwc3.yaml#
> -
>  select:
>    properties:
>      compatible:
> @@ -30,6 +27,7 @@ select:
>          enum:
>            - rockchip,rk3328-dwc3
>            - rockchip,rk3568-dwc3
> +          - rockchip,rk3588-dwc3
>    required:
>      - compatible
>  
> @@ -39,6 +37,7 @@ properties:
>        - enum:
>            - rockchip,rk3328-dwc3
>            - rockchip,rk3568-dwc3
> +          - rockchip,rk3588-dwc3
>        - const: snps,dwc3
>  
>    reg:
> @@ -58,7 +57,9 @@ properties:
>            Master/Core clock, must to be >= 62.5 MHz for SS
>            operation and >= 30MHz for HS operation
>        - description:
> -          Controller grf clock
> +          Controller grf clock OR UTMI clock
> +      - description:
> +          PIPE clock
>  
>    clock-names:
>      minItems: 3
> @@ -66,7 +67,10 @@ properties:
>        - const: ref_clk
>        - const: suspend_clk
>        - const: bus_clk
> -      - const: grf_clk
> +      - enum:
> +          - grf_clk
> +          - utmi
> +      - const: pipe
>  
>    power-domains:
>      maxItems: 1
> @@ -86,6 +90,52 @@ required:
>    - clocks
>    - clock-names
>  
> +allOf:
> +  - $ref: snps,dwc3.yaml#
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: rockchip,rk3328-dwc3
> +    then:
> +      properties:
> +        clocks:
> +          minItems: 3

minItems for clocks and clock-names is already 3, is it not?

Otherwise,
Reviewed-by: Conor Dooley <conor.dooley@...rochip.com>

Thanks,
Conor.

> +          maxItems: 4
> +        clock-names:
> +          minItems: 3
> +          items:
> +            - const: ref_clk
> +            - const: suspend_clk
> +            - const: bus_clk
> +            - const: grf_clk
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: rockchip,rk3568-dwc3
> +    then:
> +      properties:
> +        clocks:
> +          maxItems: 3
> +        clock-names:
> +          maxItems: 3
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: rockchip,rk3588-dwc3
> +    then:
> +      properties:
> +        clock-names:
> +          minItems: 3
> +          items:
> +            - const: ref_clk
> +            - const: suspend_clk
> +            - const: bus_clk
> +            - const: utmi
> +            - const: pipe
> +
>  examples:
>    - |
>      #include <dt-bindings/clock/rk3328-cru.h>
> -- 
> 2.42.0
> 

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