linux-kernel - Re: [net-next PATCH v3 09/14] dt-bindings: net: dsa: dsa-port: Document support for LEDs node

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Message-ID: <afd1f052-6bb6-4388-9620-1adb02e6d607@lunn.ch>
Date:   Wed, 15 Mar 2023 02:58:23 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Vladimir Oltean <olteanv@...il.com>
Cc:     Christian Marangi <ansuelsmth@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Gregory Clement <gregory.clement@...tlin.com>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        John Crispin <john@...ozen.org>, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-arm-msm@...r.kernel.org, Lee Jones <lee@...nel.org>,
        linux-leds@...r.kernel.org
Subject: Re: [net-next PATCH v3 09/14] dt-bindings: net: dsa: dsa-port:
 Document support for LEDs node

On Wed, Mar 15, 2023 at 02:50:00AM +0200, Vladimir Oltean wrote:
> On Tue, Mar 14, 2023 at 11:15:11AM +0100, Christian Marangi wrote:
> > Document support for LEDs node in dsa port.
> > Switch may support different LEDs that can be configured for different
> > operation like blinking on traffic event or port link.
> > 
> > Also add some Documentation to describe the difference of these nodes
> > compared to PHY LEDs, since dsa-port LEDs are controllable by the switch
> > regs and the possible intergated PHY doesn't have control on them.
> > 
> > Signed-off-by: Christian Marangi <ansuelsmth@...il.com>
> > ---
> >  .../devicetree/bindings/net/dsa/dsa-port.yaml | 21 +++++++++++++++++++
> >  1 file changed, 21 insertions(+)
> 
> Of all schemas, why did you choose dsa-port.yaml? Why not either something
> hardware specific (qca8k.yaml) or more generic (ethernet-controller.yaml)?

The binding should be generic. So qca8k.yaml is way to specific. The
Marvell switch should re-use it at some point.

Looking at the hierarchy, ethernet-controller.yaml would work since
dsa-port includes ethernet-switch-port, which includes
ethernet-controller.

These are MAC LEDs, and there is no reason why a standalone MAC in a
NIC could not implement such LEDs. So yes,
ethernet-controller.yaml.

Is there actually anything above ethernet-controller.yaml? This is
about a netdev really, so a wifi MAC, or even a CAN MAC could also use
the binding....

    Andrew