linux-kernel - Re: [PATCH v9 net-next 02/11] dt-bindings: net: add mdio property

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Message-ID: <7526eff194e4dcfec1b8d88fc30b22aeb83e3100.camel@microchip.com>
Date:   Tue, 22 Mar 2022 20:16:00 +0530
From:   Prasanna Vengateshan <prasanna.vengateshan@...rochip.com>
To:     Rob Herring <robh@...nel.org>
CC:     <andrew@...n.ch>, <netdev@...r.kernel.org>, <olteanv@...il.com>,
        <UNGLinuxDriver@...rochip.com>, <woojung.huh@...rochip.com>,
        <hkallweit1@...il.com>, <linux@...linux.org.uk>,
        <davem@...emloft.net>, <kuba@...nel.org>,
        <linux-kernel@...r.kernel.org>, <vivien.didelot@...il.com>,
        <f.fainelli@...il.com>, <devicetree@...r.kernel.org>
Subject: Re: [PATCH v9 net-next 02/11] dt-bindings: net: add mdio property

On Mon, 2022-03-21 at 18:27 -0500, Rob Herring wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you know the
> content is safe
> 
> On Fri, Mar 18, 2022 at 02:25:31PM +0530, Prasanna Vengateshan wrote:
> > mdio bus is applicable to any switch hence it is added as per the below
> > request,
> > https://lore.kernel.org/netdev/1300f84832ef1c43ecb9edb311fb817e3aab5420.camel@microchip.com/
> 
> Quoting that thread:
> 
> > Yes indeed, since this is a common property of all DSA switches, it can
> > be defined or not depending on whether the switch does have an internal
> > MDIO bus controller or not.
> 
> Whether or not a switch has an MDIO controller or not is a property of
> that switch and therefore 'mdio' needs to be documented in those switch
> bindings.
> 
> > 
> > Signed-off-by: Prasanna Vengateshan <prasanna.vengateshan@...rochip.com>
> > ---
> >  Documentation/devicetree/bindings/net/dsa/dsa.yaml | 4 ++++
> >  1 file changed, 4 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/net/dsa/dsa.yaml
> > b/Documentation/devicetree/bindings/net/dsa/dsa.yaml
> > index b9d48e357e77..0f8426e219eb 100644
> > --- a/Documentation/devicetree/bindings/net/dsa/dsa.yaml
> > +++ b/Documentation/devicetree/bindings/net/dsa/dsa.yaml
> > @@ -31,6 +31,10 @@ properties:
> >        switch 1. <1 0> is cluster 1, switch 0. A switch not part of any
> > cluster
> >        (single device hanging off a CPU port) must not specify this property
> >      $ref: /schemas/types.yaml#/definitions/uint32-array
> > +
> > +  mdio:
> > +    $ref: /schemas/net/mdio.yaml#
> > +    unevaluatedProperties: false
> 
> From a schema standpoint, this bans every switch from adding additional
> properties under an mdio node. Not likely what you want.
> 
> Rob

Thanks for the feedback. Do you mean that the 'unevaluatedProperties: false' to
be removed, so that the additional properties can be added? or mdio is not
supposed to be defined in the dsa.yaml ?