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iMX6 and Ethernet LED state in suspend.

Question asked by Anders Rønningen on Apr 5, 2018
Latest reply on Apr 11, 2018 by Anders Rønningen

We have a custom board and a Variscite DART-MX6, both equipped with the Micrel  KSZ9031 Gigabit Ethernet Tranceiver. On both I have the same issue.

 

When hitting suspend, the LEDs do not turn off, but light up constantly at a dimmed down level. If the ethernet cable is not connected and the lights are off when I invoke suspend, it still decides to light up again.

 

I've looked at the Micrel datasheet, as well as the linux drivers for fec/micrel, but find nothing to "defend" this kind of behaviour, so I just wanted to say it out loud here in case someone has a clue.

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