linux-kernel - Re: [PATCH net-next v4 2/6] dt-bindings: net: Brcm ASP 2.0 Ethernet controller

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Date:   Wed, 24 May 2023 07:51:07 +0100
From:   Conor Dooley <conor.dooley@...rochip.com>
To:     Justin Chen <justin.chen@...adcom.com>
CC:     Conor Dooley <conor@...nel.org>, <netdev@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <dri-devel@...ts.freedesktop.org>,
        <bcm-kernel-feedback-list@...adcom.com>, <justinpopo6@...il.com>,
        <f.fainelli@...il.com>, <davem@...emloft.net>,
        <edumazet@...gle.com>, <kuba@...nel.org>, <pabeni@...hat.com>,
        <robh+dt@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>,
        <opendmb@...il.com>, <andrew@...n.ch>, <hkallweit1@...il.com>,
        <linux@...linux.org.uk>, <richardcochran@...il.com>,
        <sumit.semwal@...aro.org>, <christian.koenig@....com>,
        <simon.horman@...igine.com>,
        Florian Fainelli <florian.fainelli@...adcom.com>
Subject: Re: [PATCH net-next v4 2/6] dt-bindings: net: Brcm ASP 2.0 Ethernet
 controller

Hey Justin,
On Tue, May 23, 2023 at 04:27:12PM -0700, Justin Chen wrote:
> On Tue, May 23, 2023 at 3:55 PM Conor Dooley <conor@...nel.org> wrote:
> > On Tue, May 23, 2023 at 02:53:43PM -0700, Justin Chen wrote:
> >
> > > +  compatible:
> > > +    enum:
> > > +      - brcm,asp-v2.0
> > > +      - brcm,bcm72165-asp
> > > +      - brcm,asp-v2.1
> > > +      - brcm,bcm74165-asp
> >
> > > +        compatible = "brcm,bcm72165-asp", "brcm,asp-v2.0";
> >
> > You can't do this, as Rob's bot has pointed out. Please test the
> > bindings :( You need one of these type of constructs:
> >
> > compatible:
> >   oneOf:
> >     - items:
> >         - const: brcm,bcm72165-asp
> >         - const: brcm,asp-v2.0
> >     - items:
> >         - const: brcm,bcm74165-asp
> >         - const: brcm,asp-v2.1
> >
> > Although, given either you or Florian said there are likely to be
> > multiple parts, going for an enum, rather than const for the brcm,bcm..
> > entry will prevent some churn. Up to you.
> >
> Urg so close. Thought it was a trivial change, so didn't bother
> retesting the binding. I think I have it right now...
> 
>   compatible:
>     oneOf:
>       - items:
>           - enum:
>               - brcm,bcm72165-asp
>               - brcm,bcm74165-asp
>           - enum:
>               - brcm,asp-v2.0
>               - brcm,asp-v2.1
> 
> Something like this look good?

I am still caffeine-less, but this implies that both of
"brcm,bcm72165-asp", "brcm,asp-v2.0"
_and_
"brcm,bcm72165-asp", "brcm,asp-v2.1"
are. I suspect that that is not the case, unless "brcm,asp-v2.0" is a
valid fallback for "brcm,asp-v2.1"?
The oneOf: also becomes redundant since you only have one items:.

> Will submit a v5 tomorrow.

BTW, when you do, could you use the address listed in MAINTAINERS rather
than the one you used for this version?

Cheers,
Conor.