[PATCH 1/2] ARM: dts: imx6qdl-gw5904: add internal mdio nodes

[Tim Harvey]

On Fri, Dec 2, 2022 at 5:08 AM Andrew Lunn <andrew at lunn.ch> wrote:
>
> On Thu, Dec 01, 2022 at 10:02:08PM -0300, Fabio Estevam wrote:
> > Hi Tim,
> >
> > [Adding Andrew]
>
> It is not wrong, but it should also mostly not be needed. The switch
> driver can link internal PHYs to ports.

Andrew,

I should have mentioned in the commit log that this does not change
behavior on Linux but is required for boot firmware. Specifically
U-Boot requires the internal PHY ports to be defined for its DSA
architecture and they share dt's as much as possible.

>
> > >                                 port at 5 {
> > >                                         reg = <5>;
> > >                                         label = "cpu";
> > >                                         ethernet = <&fec>;
> > > +                                       phy-mode = "rgmii-id";
> > > +
> > > +                                       fixed-link {
> > > +                                               speed = <1000>;
> > > +                                               full-duplex;
> > > +                                       };
> > >                                 };
>
> This part is needed to make a warning go away. Does the SoC network interface
> have phy-mode = "rgmii"; ?

No, it looks like this:

&fec {
        pinctrl-names = "default";
        pinctrl-0 = <&pinctrl_enet>;
        phy-mode = "rgmii-id";
        status = "okay";

        fixed-link {
                speed = <1000>;
                full-duplex;
        };

        mdio {
                #address-cells = <1>;
                #size-cells = <0>;

                switch at 0 {
                        compatible = "marvell,mv88e6085";
                        reg = <0>;
...

Is something here wrong?

Best Regards,

Tim