Hello,
I am in the process of updating one of our older i.MX6 Solo based products from an older 4.9.11 Linux kernel to a newer 6.1.55-2.2.1 Linux kernel (from linux-imx repository). So far I have been able to boot the device but we are having a problem with ethernet (FEC) connectivity. The FEC driver and Micrel 9031 PHY that we are using are recognized and loaded by the kernel but there is no network communication. The RJ45 network jack has its LEDs blinking normally but there is no data (other than ARP requests) going through the interface. I found that if I add a fixed-link property (see below) to the device tree then I are able to get data in and out of the ethernet port and can ping. The problem is that we can’t have the port fixed at a particular speed as we need to be able to support both 100 Mbps and 1000 Mbps. I would appreciate any help.
Here are snippets from our device tree that are relevant to the ethernet FEC. It works with the fixed-link node and if we remove the fixed-link node we get nothing out of the ethernet port.
Top-level DTS file snippet:
[...]
/dts-v1/;
#include "imx6dl.dtsi"
#include "ourcustom.dtsi"
/ {
model = "Our Custom Device";
compatible = "fsl,imx6dl-sabrelite", "fsl,imx6dl";
};
[...]
DTSI file ourcustom.dtsi snippet:
[…]
&fec {
phy-mode = "rgmii";
status = "okay";
fixed-link {
speed = <1000>;
full-duplex;
};
};
[…]
Thanks,
Patrick
