linux-kernel - Re: [PATCH RESEND net] net: phy: xgmiitorgmii: Support generic PHY status read

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Date:   Mon, 11 Mar 2019 11:34:27 +0530
From:   Harini Katakam <harinik@...inx.com>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     Michal Simek <michal.simek@...inx.com>,
        Paul Kocialkowski <paul.kocialkowski@...tlin.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        netdev@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org,
        "David S . Miller" <davem@...emloft.net>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Heiner Kallweit <hkallweit1@...il.com>
Subject: Re: [PATCH RESEND net] net: phy: xgmiitorgmii: Support generic PHY
 status read

Hi Andrew,
On Sat, Mar 9, 2019 at 9:53 PM Andrew Lunn <andrew@...n.ch> wrote:
>
> > Related to this, I have a query on how the DT node for gmii2rgmii should look.
> > One of the users of gmii2rgmii is Cadence macb driver. In Xilinx tree, we use
> > this piece of code to register this mdiobus:
> > + mdio_np = of_get_child_by_name(np, "mdio");
> > + if (mdio_np) {
> > + of_node_put(mdio_np);
> > + err = of_mdiobus_register(bp->mii_bus, mdio_np);
> > + if (err)
> > + goto err_out_unregister_bus;
> >
> > And the DT node looks like this:
> > ethernet {
> >     phy-mode = "gmii";
> >     phy-handle = <&extphy>;
> >
> >     mdio {
> >         extphy {
> >             reg = <x>;
> >         };
> >         gmii_to_rgmii{
> >             compatible = "xlnx,gmii-to-rgmii-1.0";
> >             phy-handle = <&extphy>;
> >             reg = <x>;
> >         };
> >     };
> > };
>
> Hi Harini
>
> You have this setup:
>
> MAC <==> GMII2RGMII <==> RGMII_PHY
>
> So you want the MAC phy-handle to point to the gmii_to_rgmii 'PHY'.
>
> Feel free to submit a patch extending
> Documentation/devicetree/bindings/net/xilinx_gmii2rgmii.txt to include
> a MAC node, etc.

Thank you, will do the same.

Regards,
Harini