netdev - RE: [PATCH v2 4/8] dt-bindings: net: renesas: Document Renesas Ethernet Switch

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Date:   Mon, 26 Sep 2022 09:14:43 +0000
From:   Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        "kishon@...com" <kishon@...com>,
        "vkoul@...nel.org" <vkoul@...nel.org>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "edumazet@...gle.com" <edumazet@...gle.com>,
        "kuba@...nel.org" <kuba@...nel.org>,
        "pabeni@...hat.com" <pabeni@...hat.com>,
        "richardcochran@...il.com" <richardcochran@...il.com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "krzysztof.kozlowski+dt@...aro.org" 
        <krzysztof.kozlowski+dt@...aro.org>,
        "geert+renesas@...der.be" <geert+renesas@...der.be>
CC:     "andrew@...n.ch" <andrew@...n.ch>,
        "linux-phy@...ts.infradead.org" <linux-phy@...ts.infradead.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-renesas-soc@...r.kernel.org" 
        <linux-renesas-soc@...r.kernel.org>
Subject: RE: [PATCH v2 4/8] dt-bindings: net: renesas: Document Renesas
 Ethernet Switch

> From: Krzysztof Kozlowski, Sent: Monday, September 26, 2022 3:50 PM
> 
> On 26/09/2022 08:10, Yoshihiro Shimoda wrote:
> 
> > I'll add a blank line here.
> >
> >>> +      '#size-cells':
> >>> +        const: 0
> >>> +
> >>> +    additionalProperties: false
> >>
> >> Don't put it between properties. For nested object usually this is
> >> before properties:
> >
> > I'll drop it.
> 
> Don't drop, but instead put it before "properties" for this nested object.

Oh, I got it. Thanks!
I'll put this before "properties:" like below:
-----
  ethernet-ports:
    type: object

    additionalProperties: false

    properties:
      '#address-cells':
        description: Port number of ETHA (TSNA).
        const: 1

      '#size-cells':
        const: 0
-----

Best regards,
Yoshihiro Shimoda

> >
> >>> +
> >>> +    patternProperties:
> >>> +      "^port@[0-9a-f]+$":
> >>> +        type: object
> >>> +
> >>
> >> Skip blank line.
> >
> > I got it.
> >
> >>> +        $ref: "/schemas/net/ethernet-controller.yaml#"
> >>
> >> No need for quotes.
> >
> > I'll drop the quotes.
> >
> >>> +        unevaluatedProperties: false
> >>> +
> >>> +        properties:
> >>> +          reg:
> >>> +            description:
> >>> +              Port number of ETHA (TSNA).
> >>> +
> >>> +          phy-handle:
> >>> +            description:
> >>> +              Phandle of an Ethernet PHY.
> >>
> >> Why do you need to mention this property? Isn't it coming from
> >> ethernet-controller.yaml?
> >
> > Indeed. I'll drop the description.
> >
> >>> +
> >>> +          phy-mode:
> >>> +            description:
> >>> +              This specifies the interface used by the Ethernet PHY.
> >>> +            enum:
> >>> +              - mii
> >>> +              - sgmii
> >>> +              - usxgmii
> >>> +
> >>> +          phys:
> >>> +            maxItems: 1
> >>> +            description:
> >>> +              Phandle of an Ethernet SERDES.
> >>
> >> This is getting confusing. You have now:
> >> - phy-handle
> >> - phy
> >> - phy-device
> >> - phys
> >> in one schema... although lan966x serdes seems to do the same. :/
> >
> > Yes... I found the following documents have "phy" and "phy-handle" by using
> > git grep -l -w "phys" `git grep -l phy-handle Documentation/devicetree/bindings/`:
> > Documentation/devicetree/bindings/net/cdns,macb.yaml
> > Documentation/devicetree/bindings/net/cpsw.txt
> > Documentation/devicetree/bindings/net/microchip,lan966x-switch.yaml
> > Documentation/devicetree/bindings/net/microchip,sparx5-switch.yaml
> > Documentation/devicetree/bindings/net/ti,cpsw-switch.yaml
> > Documentation/devicetree/bindings/net/ti,k3-am654-cpsw-nuss.yaml
> > Documentation/devicetree/bindings/phy/phy-bindings.txt
> >
> > And I'm interesting that the phy-bindings.txt said the following:
> > -----
> > phys : the phandle for the PHY device (used by the PHY subsystem; not to be
> >        confused with the Ethernet specific 'phy' and 'phy-handle' properties,
> >        see Documentation/devicetree/bindings/net/ethernet.txt for these)
> > -----
> 
> Indeed, seems ok.
> 
> >
> 
> Best regards,
> Krzysztof