How to set ls1028 eth ports to fixed-link on dts file?

[xinliwang]

Hi, community

I want to set ls1028 ports to a fixed-link on dts file, here down below is I have done

but it seems doesn't work I found out it only change the internal link but not the external link.

So, does anyone know who to set ls1028 eth ports to a fixed link mode? 

Thanks

[khushbur]

Hi @xinliwang 

Can you brief about your set up? Is your setup is PHYLess(MAC to MAc)?

Please change your dts file as following

&enetc_port0 {
phy-connection-type = "sgmii";
managed = "in-band-status";

fixed-link = <0 1 1000 0 0>;
status = "okay";

};

Thanks

Khushbu

[xinliwang]

Hi @khushbur 

Thank you for your reply

My setup is pretty much the same as reference board. Not mac to mac but mac to phy.

I've tried the dts file like this

&enetc_port0 {
phy-connection-type = "sgmii";
managed = "in-band-status";

fixed-link {

   speed =<100>;

  full-duplex;

};
status = "okay";

}

It doesn't work and even the eno0 is missing.

But anyway I'll try your setup of dts to see if it works.

Thanks

[khushbur]

Hi @xinliwang 

For mac to phy connection please define below in your DTS file.

&enetc_port0 {
phy-handle = <&sgmii_phy0>;
phy-connection-type = "sgmii";
managed = "in-band-status";
status = "okay";

mdio {
#address-cells = <1>;
#size-cells = <0>;
sgmii_phy0: ethernet-phy@yourphy_addr {
reg = <0xyourphy_addr>;
};
};
};

 Thanks

Khushbu

[xinliwang]

Hi @khushbur 

My original setup of dts is exactly the same as your recommand. It works fine but it is autonegotiation.

But my question is how to change it to the fixed-link. I didn't see any fix-linked setup from your dts.

Thanks

[khushbur · Accepted solution]

Hi @xinliwang 

"fixed-link" property is for phyless configuration.

When you declare a "fixed-link", you tell Linux that there is no PHY
at all. A dummy PHY driver is used then, all parameters are set
statically as specified in the DT, no link status is tracked at all.

To set fixed-link with phy you need to modify your phy driver code.

Thanks

Khushbu