linux-kernel - Re: [net-next PATCH v5 15/15] arm: mvebu: dt: Add PHY LED support for 370-rd WAN port

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Message-ID: <ZBykRJmkxF7zf8g8@duo.ucw.cz>
Date:   Thu, 23 Mar 2023 20:11:00 +0100
From:   Pavel Machek <pavel@....cz>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     Christian Marangi <ansuelsmth@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...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>,
        Lee Jones <lee@...nel.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, linux-leds@...r.kernel.org
Subject: Re: [net-next PATCH v5 15/15] arm: mvebu: dt: Add PHY LED support
 for 370-rd WAN port

Hi!

> > > The WAN port of the 370-RD has a Marvell PHY, with one LED on
> > > the front panel. List this LED in the device tree.
> > > 
> > > Signed-off-by: Andrew Lunn <andrew@...n.ch>
> > > Signed-off-by: Christian Marangi <ansuelsmth@...il.com>
> > 
> > > @@ -135,6 +136,19 @@ &mdio {
> > >  	pinctrl-names = "default";
> > >  	phy0: ethernet-phy@0 {
> > >  		reg = <0>;
> > > +		leds {
> > > +			#address-cells = <1>;
> > > +			#size-cells = <0>;
> > > +
> > > +			led@0 {
> > > +				reg = <0>;
> > > +				label = "WAN";
> > > +				color = <LED_COLOR_ID_WHITE>;
> > > +				function = LED_FUNCTION_LAN;
> > > +				function-enumerator = <1>;
> > > +				linux,default-trigger = "netdev";
> > > +			};
> > > +		};
> > >  	};
> > >  
> > 
> > How will this end up looking in sysfs?
> 
> Hi Pavel
> 
> It is just a plain boring LED, so it will look like all other LEDs.
> There is nothing special here.

Well, AFAICT it will end up as /sys/class/leds/WAN, which is really
not what we want. (Plus the netdev trigger should be tested; we'll
need some kind of link to the ethernet device if we want this to work
on multi-ethernet systems).

> > Should documentation be added to Documentation/leds/leds-blinkm.rst
> >  ?
> 
> This has nothing to do with blinkm, which appears to be an i2c LED
> driver.

Sorry, I meant

Should documentation be added to Documentation/leds/well-known-leds.txt ?

Best regards,
								Pavel
-- 
People of Russia, stop Putin before his war on Ukraine escalates.

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