> > I also have a simple utility to communicate with that registers file to
> > read/write
> > register individually. Is there a standard Linux utility for that
> > function?
>
> I don't think standard utility exists. Binary file which can be
> written by userspace shoudl be enough.
mii-tool will allow you to read PHY registers. The kernel API it uses
allows you to read any register on the MDIO bus.
> spi@0 {
> compatible = "microchip,ksz8895";
> ...
> ports {
> port@4 {
> reg = <4>;
> label = "cpu";
> ethernet = <&mac0>;
> fixed-link {
> speed = <100>;
> full-duplex;
> };
> };
> };
> };
>
> On one side, and
>
> mac0: ethernet@800f0000 {
> phy-mode = "rmii";
> status = "okay";
> fixed-link {
> speed = <100>;
> full-duplex;
> };
> };
Are the MAC connected back-to-back, or do you have PHYs in the middle?
mac0 you have phy-mode = "rmii";. You can put the same in the port@4,
but i don't know if the driver looks for it, and configures the MAC as
needed.
Andrew
