linux-kernel - Re: [PATCH net-next 06/12] net: dsa: rzn1-a5psw: add Renesas RZ/N1 advanced 5 port switch driver

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Date:   Thu, 14 Apr 2022 19:51:16 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Vladimir Oltean <olteanv@...il.com>
Cc:     Clément Léger <clement.leger@...tlin.com>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Magnus Damm <magnus.damm@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Herve Codina <herve.codina@...tlin.com>,
        Miquèl Raynal <miquel.raynal@...tlin.com>,
        Milan Stevanovic <milan.stevanovic@...com>,
        Jimmy Lalande <jimmy.lalande@...com>,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-renesas-soc@...r.kernel.org, netdev@...r.kernel.org,
        Laurent Gonzales <laurent.gonzales@....se.com>,
        Jean-Pierre Geslin <jean-pierre.geslin@....se.com>,
        Phil Edworthy <phil.edworthy@...esas.com>
Subject: Re: [PATCH net-next 06/12] net: dsa: rzn1-a5psw: add Renesas RZ/N1
 advanced 5 port switch driver

> > +static int a5psw_probe_mdio(struct a5psw *a5psw)
> > +{
> > +	struct device *dev = a5psw->dev;
> > +	struct device_node *mdio_node;
> > +	struct mii_bus *bus;
> > +	int err;
> > +
> > +	if (of_property_read_u32(dev->of_node, "clock-frequency",
> > +				 &a5psw->mdio_freq))
> > +		a5psw->mdio_freq = A5PSW_MDIO_DEF_FREQ;
> 
> Shouldn't the clock-frequency be a property of the "mdio" node?
> At least I see it in Documentation/devicetree/bindings/net/mdio.yaml.

Yes. And the example in the binding document for this driver also
places it in the mdio node.

       Andrew