linux-kernel - Re: [PATCH 1/7] dt-bindings: phy: samsung,usb3-drd-phy: add gs101 compatible

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Date: Wed, 24 Apr 2024 14:43:31 -0500
From: Rob Herring <robh@...nel.org>
To: André Draszik <andre.draszik@...aro.org>
Cc: Vinod Koul <vkoul@...nel.org>,
	Kishon Vijay Abraham I <kishon@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Peter Griffin <peter.griffin@...aro.org>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Sylwester Nawrocki <s.nawrocki@...sung.com>,
	Alim Akhtar <alim.akhtar@...sung.com>,
	Sam Protsenko <semen.protsenko@...aro.org>,
	Krzysztof Kozlowski <krzk@...nel.org>,
	Tudor Ambarus <tudor.ambarus@...aro.org>,
	Will McVicker <willmcvicker@...gle.com>,
	Roy Luo <royluo@...gle.com>, kernel-team@...roid.com,
	linux-phy@...ts.infradead.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org,
	Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: Re: [PATCH 1/7] dt-bindings: phy: samsung,usb3-drd-phy: add gs101
 compatible

On Tue, Apr 23, 2024 at 06:06:03PM +0100, André Draszik wrote:
> Add a dedicated google,gs101-usb31drd-phy compatible for Google Tensor
> gs101 SoC.
> 
> It needs additional clocks enabled for register access, and additional
> memory regions (PCS & PMA) are required for successful configuration.
> 
> Signed-off-by: André Draszik <andre.draszik@...aro.org>
> ---
>  .../bindings/phy/samsung,usb3-drd-phy.yaml         | 78 +++++++++++++++++-----
>  1 file changed, 61 insertions(+), 17 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/phy/samsung,usb3-drd-phy.yaml b/Documentation/devicetree/bindings/phy/samsung,usb3-drd-phy.yaml
> index 452e584d9812..db1dc4c60b72 100644
> --- a/Documentation/devicetree/bindings/phy/samsung,usb3-drd-phy.yaml
> +++ b/Documentation/devicetree/bindings/phy/samsung,usb3-drd-phy.yaml
> @@ -25,6 +25,7 @@ description: |
>  properties:
>    compatible:
>      enum:
> +      - google,gs101-usb31drd-phy
>        - samsung,exynos5250-usbdrd-phy
>        - samsung,exynos5420-usbdrd-phy
>        - samsung,exynos5433-usbdrd-phy
> @@ -57,7 +58,18 @@ properties:
>        the OF graph bindings specified.
>  
>    reg:
> -    maxItems: 1
> +    minItems: 1
> +    items:
> +      - description: PHY register base address.
> +      - description: PCS register base address.
> +      - description: PMA register base address.
> +
> +  reg-names:
> +    minItems: 1
> +    items:
> +      - const: phy
> +      - const: pcs
> +      - const: pma
>  
>    samsung,pmu-syscon:
>      $ref: /schemas/types.yaml#/definitions/phandle
> @@ -85,30 +97,62 @@ allOf:
>        properties:
>          compatible:
>            contains:
> -            enum:
> -              - samsung,exynos5433-usbdrd-phy
> -              - samsung,exynos7-usbdrd-phy
> +            const: google,gs101-usb31drd-phy
>      then:
>        properties:
>          clocks:
> -          minItems: 5
> -          maxItems: 5
> -        clock-names:
>            items:
> -            - const: phy
> -            - const: ref
> -            - const: phy_utmi
> -            - const: phy_pipe
> -            - const: itp
> -    else:
> -      properties:
> -        clocks:
> -          minItems: 2
> -          maxItems: 2
> +            - description: Gate of main PHY clock
> +            - description: Gate of PHY reference clock
> +            - description: Gate of control interface AXI clock
> +            - description: Gate of control interface APB clock
> +            - description: Gate of SCL APB clock
>          clock-names:
>            items:
>              - const: phy
>              - const: ref
> +            - const: ctrl_aclk
> +            - const: ctrl_pclk
> +            - const: scl_pclk
> +        reg:
> +          minItems: 3
> +        reg-names:
> +          minItems: 3
> +      required:
> +        - reg-names
> +    else:
> +      if:

We generally try to avoid having nested else/if like this. Please change 
the existing 'else' to an 'if' and then add an 'if' for your new 
compatible.

Rob