Colibri VF50 with exterenal switch etherenet port detection issues

Technical Support
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1

hi, I am using Colibri VF50 on a custom carrier board. On the carrier board, there is a Micrel KSZ8863 switch we would like to use. The switch is connected to two external Ethernet ports (port1 and port2). Right now, the Linux would determine the whether the Ethernet port is up/down base on the physical connection of port1 (and port1 only), and ignoring port2. However, I would like to modify it such that the Linux would think the Ethernet port is up when EITHER port1 OR port2 is physically connected.

In the device tree file, vf-colibri-dual-eth.dtsi, we have:

Ethernet0 = &fec0; 
&fec0 {
    phy-mode = "rmii";
    pinctrl-names = "default";
    pinctrl-0 = <&pinctrl_fec0>;
    status = "okay";
};

I can set Ethernet0 = &fec0; as suggested here, however, after doing that, Linux would think Ethernet would always be up even with any physical connections.
please help

thank you

2

Reporting the link being always up is really the expected and correct behaviour as it is indeed always connected to your switch chip. What you are looking for is to get the port status of your other switch chip ports which you may be able to get using its switchdev integration as already mentioned here: