linux-kernel - Re: [PATCH net-next v1 3/4] dt-bindings: net: phy: add MaxLinear GPY2xx bindings

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Date:   Wed, 28 Dec 2022 16:00:01 +0100
From:   Michael Walle <michael@...le.cc>
To:     Rob Herring <robh@...nel.org>
Cc:     Xu Liang <lxu@...linear.com>, Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        "David S . Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH net-next v1 3/4] dt-bindings: net: phy: add MaxLinear
 GPY2xx bindings

>> +
>> +      Affected PHYs (as far as known) are GPY215B and GPY215C.
>> +    type: boolean
>> +
>> +dependencies:
>> +  maxlinear,use-broken-interrupts: [ interrupts ]

Btw. I'd presume that the tools will also allow interrupts-extended, but 
that
doesn't seem to be the case. Do I need some kind of anyOf here?

>> +
>> +unevaluatedProperties: false
>> +
>> +examples:
>> +  - |
>> +    ethernet {
>> +        #address-cells = <1>;
>> +        #size-cells = <0>;
>> +
>> +        ethernet-phy@0 {
>> +            reg = <0>;
>> +            interrupts-extended = <&intc 0>;
>> +            maxlinear,use-broken-interrupts;
> 
> This is never actually checked by be schema because there is nothing to
> match on. If you want custom properties, then you need a compatible.

I can add an unwanted compatible here, or skip the example altogether. 
But
what puzzles me is that this schema pulls in the ethernet-phy.yaml. The 
latter
then has a custom select statement on the $nodename and even a comment:

# The dt-schema tools will generate a select statement first by using
# the compatible, and second by using the node name if any. In our
# case, the node name is the one we want to match on, while the
# compatible is optional.

Why doesn't that work?

-michael