Hi everyone,
At our work company, we recently made the design of a new board using a KSZ9031 for ethernet connection.
It is working OK in 10/100 mbits mode : I can ping an other host without any issue.
The problem appears when trying gigabit connection : the interface goes up and then down a few seconds later, like a yoyo.
I tried using the mi-tool utility to dump phy registers, but I'm getting an error : SIOCGMIIPHY on 'eth0' failed: No such device.
So the question is : what could be the issue if phy is working in 100mbits but not gigabit ?
We are using a kernel 3.10.17 and I implemented the device tree to support the phy.
I have no experience debugging ethernet phy hardware issues so any help / hint is appreciated.
Thx,
Phil
Hi Phil
one can look at drivers on
https://community.nxp.com/thread/311185
https://community.nxp.com/thread/321938
for RGMII one may need to adjust skew according to i.MX6 RGMII
datasheet requirements, KSZ9031 has skew pad registers
which may be used for tweaking timings.
Best regards
igor
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