I'm currently having trouble communicating with a ethernet switch device connected directly to the LS1021A TWR boards eTESC interface over SGMII (MAC-MAC PHY-less connection).
We are currently adding a new device to our existing embedded Linux system built using the LS1021A TWR platform. The existing system used this interface to connect to a ethernet port which we have changed to connect directly to a ethernet switch chip removing the PHY interface and connecting directly using the existing SGMII lines.
I have made the following changes to the device tree.
(ethernet 0 for reference, same as old configuration)
&enet0 {
tbi-handle = <&tbi1>;
phy-handle = <&sgmii_phy0>;
phy-connection-type = "sgmii";
status = "okay";
};
(ethernet 1 new interface to ethernet switch device with changes to device tree)
&enet1 {
tbi-handle = <&tbi1>;
phy-connection-type = "sgmii";
fixed-link = <0 1 1000 0 0>;
status = "okay";
};
When using ethtool on the interface the output is shown below
I can see outgoing traffic on the port using tcpdump but am still not getting any response from the chip.
Any help would be greatly appreciated.
