netdev - Re: [PATCH v4 1/4] dt-bindings: net: phy: Add support for NXP TJA11xx

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Date:   Wed, 29 Apr 2020 06:38:08 +0200
From:   Oleksij Rempel <o.rempel@...gutronix.de>
To:     Rob Herring <robh+dt@...nel.org>,
        "David S. Miller" <davem@...emloft.net>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Mark Rutland <mark.rutland@....com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        netdev <netdev@...r.kernel.org>, Marek Vasut <marex@...x.de>,
        David Jander <david@...tonic.nl>, devicetree@...r.kernel.org
Subject: Re: [PATCH v4 1/4] dt-bindings: net: phy: Add support for NXP TJA11xx

@Rob, thank you for the review.

@David, should I send fixes or reworked initial patches?

On Tue, Apr 28, 2020 at 12:30:06PM -0500, Rob Herring wrote:
> On Fri, Mar 13, 2020 at 12:23 AM Oleksij Rempel <o.rempel@...gutronix.de> wrote:
> >
> > Document the NXP TJA11xx PHY bindings.
> 
> Given the discussion, I'd marked this one as "changes requested"
> expecting a new version to review the schema. And gmail decided to
> make a new thread due to the extra 'RE:'. So it fell off my radar.
> 
> This schema is fundamentally broken as there's no way to match for
> when to apply this schema. How do we find a NXP TJA11xx PHY? I suppose
> we can look for 'ethernet-phy' with a child node 'ethernet-phy', but
> then that would apply to any phy like this one. This needs a
> compatible string IMO given it is non-standard.
> 
> >
> > Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
> > ---
> >  .../devicetree/bindings/net/nxp,tja11xx.yaml  | 61 +++++++++++++++++++
> >  1 file changed, 61 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/net/nxp,tja11xx.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/net/nxp,tja11xx.yaml b/Documentation/devicetree/bindings/net/nxp,tja11xx.yaml
> > new file mode 100644
> > index 000000000000..42be0255512b
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/net/nxp,tja11xx.yaml
> > @@ -0,0 +1,61 @@
> > +# SPDX-License-Identifier: GPL-2.0+
> 
> Dual license new bindings:
> 
> (GPL-2.0-only OR BSD-2-Clause)
> 
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/net/nxp,tja11xx.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: NXP TJA11xx PHY
> > +
> > +maintainers:
> > +  - Andrew Lunn <andrew@...n.ch>
> > +  - Florian Fainelli <f.fainelli@...il.com>
> > +  - Heiner Kallweit <hkallweit1@...il.com>
> > +
> > +description:
> > +  Bindings for NXP TJA11xx automotive PHYs
> 
> Perhaps some information about how this phy is special.
> 
> > +
> > +allOf:
> > +  - $ref: ethernet-phy.yaml#
> 
> Not needed here as ethernet-phy.yaml already has a 'select' condition to apply.
> 
> > +
> > +patternProperties:
> > +  "^ethernet-phy@[0-9a-f]+$":
> > +    type: object
> > +    description: |
> > +      Some packages have multiple PHYs. Secondary PHY should be defines as
> > +      subnode of the first (parent) PHY.
> > +
> > +    properties:
> > +      reg:
> > +        minimum: 0
> > +        maximum: 31
> > +        description:
> > +          The ID number for the child PHY. Should be +1 of parent PHY.
> > +
> > +    required:
> > +      - reg
> > +
> > +examples:
> > +  - |
> > +    mdio {
> > +        #address-cells = <1>;
> > +        #size-cells = <0>;
> > +
> > +        tja1101_phy0: ethernet-phy@4 {
> > +            reg = <0x4>;
> > +        };
> > +    };
> > +  - |
> > +    mdio {
> > +        #address-cells = <1>;
> > +        #size-cells = <0>;
> > +
> > +        tja1102_phy0: ethernet-phy@4 {
> > +            reg = <0x4>;
> 
> > +            #address-cells = <1>;
> > +            #size-cells = <0>;
> 
> These aren't documented.
> 
> > +
> > +            tja1102_phy1: ethernet-phy@5 {
> > +                reg = <0x5>;
> > +            };
> > +        };
> > +    };
> > --
> > 2.25.1
> >
> 

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