linux-kernel - Re: [PATCH v2 devicetree 2/2] powerpc: dts: t1040rdb: add ports for Seville Ethernet switch

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Date:   Tue, 29 Sep 2020 22:10:48 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Vladimir Oltean <vladimir.oltean@....com>
Cc:     "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "mpe@...erman.id.au" <mpe@...erman.id.au>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "benh@...nel.crashing.org" <benh@...nel.crashing.org>,
        "paulus@...ba.org" <paulus@...ba.org>,
        "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "Madalin Bucur (OSS)" <madalin.bucur@....nxp.com>,
        Radu-andrei Bulie <radu-andrei.bulie@....com>,
        "fido_max@...ox.ru" <fido_max@...ox.ru>,
        Vladimir Oltean <olteanv@...il.com>
Subject: Re: [PATCH v2 devicetree 2/2] powerpc: dts: t1040rdb: add ports for
 Seville Ethernet switch

On Tue, Sep 29, 2020 at 07:39:54PM +0000, Vladimir Oltean wrote:
> On Tue, Sep 29, 2020 at 09:11:53PM +0200, Andrew Lunn wrote:
> > > +&seville_port0 {
> > > +	managed = "in-band-status";
> > > +	phy-handle = <&phy_qsgmii_0>;
> > > +	phy-mode = "qsgmii";
> > > +	/* ETH4 written on chassis */
> > > +	label = "swp4";
> >
> > If ETH4 is on the chassis why not use ETH4?
> 
> You mean all-caps, just like that?

Yes.

DSA is often used in WiFI access point, etc. The user is not a
computer professional. If the WebGUI says ETH4, and the label on the
front says ETH4, they probably think the two are the same, and are
happy.

I have one box which does not have an labels on the front panels, but
the industrial sockets for Ethernet are colour coded. So the interface
names are red, blue, green, to match the socket colour, and the cable
set is also colour coded the same.

So long as it is unique, the kernel does not care. So make it easy for
the user.

    Andrew