linux-kernel - Re: [PATCH v6 1/2] dt-bindings: phy: add bcm63xx-usbh bindings

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Message-ID: <20200716154604.GA2370346@bogus>
Date:   Thu, 16 Jul 2020 09:46:04 -0600
From:   Rob Herring <robh@...nel.org>
To:     Álvaro Fernández Rojas <noltari@...il.com>
Cc:     simon@...ott.org, jonas.gorski@...il.com, kishon@...com,
        vkoul@...nel.org, f.fainelli@...il.com,
        bcm-kernel-feedback-list@...adcom.com, p.zabel@...gutronix.de,
        krzk@...nel.org, gregkh@...uxfoundation.org, alcooperx@...il.com,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v6 1/2] dt-bindings: phy: add bcm63xx-usbh bindings

On Wed, Jul 15, 2020 at 03:18:02PM +0200, Álvaro Fernández Rojas wrote:
> Document BCM63xx USBH PHY bindings.
> 
> Signed-off-by: Álvaro Fernández Rojas <noltari@...il.com>
> Reviewed-by: Florian Fainelli <f.fainelli@...il.com>
> ---
>  v6: introduce changes suggested by Rob:
>   - Add another if case to device tree binding for SoCs with just 1 clock.
>   - Ignored "additionalProperties: false" suggestion since it triggers a
>     warning. This has been reported, but I haven't received any answer yet.

Ask your question here or I have to go look for it...

Looks like it is for 'clocks' though. The main schema has to define all 
the properties for 'additionalProperties: false'. More below...

>  v5: no changes.
>  v4: conditionally require 1/2 clocks and fix clock/reset values.
>  v3: no changes.
>  v2: phy-cells changed to 1.
> 
>  .../bindings/phy/brcm,bcm63xx-usbh-phy.yaml   | 97 +++++++++++++++++++
>  1 file changed, 97 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/phy/brcm,bcm63xx-usbh-phy.yaml
> 
> diff --git a/Documentation/devicetree/bindings/phy/brcm,bcm63xx-usbh-phy.yaml b/Documentation/devicetree/bindings/phy/brcm,bcm63xx-usbh-phy.yaml
> new file mode 100644
> index 000000000000..8ab0ab3154ed
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/brcm,bcm63xx-usbh-phy.yaml
> @@ -0,0 +1,97 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: "http://devicetree.org/schemas/phy/brcm,bcm63xx-usbh-phy.yaml#"
> +$schema: "http://devicetree.org/meta-schemas/core.yaml#"
> +
> +title: BCM63xx USBH PHY
> +
> +maintainers:
> +  - Álvaro Fernández Rojas <noltari@...il.com>
> +
> +properties:
> +  compatible:
> +    enum:
> +      - brcm,bcm6318-usbh-phy
> +      - brcm,bcm6328-usbh-phy
> +      - brcm,bcm6358-usbh-phy
> +      - brcm,bcm6362-usbh-phy
> +      - brcm,bcm6368-usbh-phy
> +      - brcm,bcm63268-usbh-phy
> +
> +  reg:
> +    maxItems: 1
> +
> +  resets:
> +    maxItems: 1
> +
> +  "#phy-cells":
> +    const: 1
> +
> +required:
> +  - compatible
> +  - reg
> +  - resets
> +  - "#phy-cells"
> +
> +allOf:
> +  - if:
> +      properties:
> +        compatible:
> +          enum:
> +            - brcm,bcm6328-usbh-phy
> +            - brcm,bcm6358-usbh-phy
> +            - brcm,bcm6362-usbh-phy
> +            - brcm,bcm6368-usbh-phy
> +    then:
> +      properties:
> +        clocks:
> +          maxItems: 1
> +        clock-names:
> +          items:
> +            - const: usbh

With the below changes, this can be:

then:
  properties:
    clocks:
      maxItems: 1
    clock-names:
      maxItems: 1
else:
  properties:
    clocks:
      minItems: 2
    clock-names:
      minItems: 2

> +      required:
> +        - clocks
> +        - clock-names

Looks like these are always required and can be at the top level.

> +  - if:
> +      properties:
> +        compatible:
> +          enum:
> +            - brcm,bcm6318-usbh-phy
> +            - brcm,bcm63268-usbh-phy
> +    then:
> +      properties:
> +        clocks:
> +          maxItems: 2
> +        clock-names:
> +          items:
> +            - const: usbh
> +            - const: usb_ref

Move this to the main schema with {minItems: 1, maxItems: 2} for both.

> +      required:
> +        - clocks
> +        - clock-names
> +  - if:
> +      properties:
> +        compatible:
> +          enum:
> +            - brcm,bcm6318-usbh-phy
> +            - brcm,bcm6328-usbh-phy
> +            - brcm,bcm6362-usbh-phy
> +            - brcm,bcm63268-usbh-phy
> +    then:
> +      properties:
> +        power-domains:
> +          maxItems: 1

This can be in the main section.

> +      required:
> +        - power-domains

And then add to disallow power-domains:

else:
  properties:
    power-domains: false

> +
> +examples:
> +  - |
> +    usbh: usb-phy@...01700 {
> +      compatible = "brcm,bcm6368-usbh-phy";
> +      reg = <0x10001700 0x38>;
> +      clocks = <&periph_clk 15>;
> +      clock-names = "usbh";
> +      resets = <&periph_rst 12>;
> +      #phy-cells = <1>;
> +    };
> -- 
> 2.27.0
>