Wanting to make use of this I noticed that polarity settings are only
applied once in of_phy_led(), which is not sufficient for my use-case:

I'm writing a LED driver for Aquantia PHYs and those PHYs reset the
polarity mode every time a PHY reset is triggered.

I ended up writing the patch below, but I'm not sure if phy_init_hw
should take care of this or if the polarity modes should be stored in
memory allocated by the PHY driver and re-applied by the driver after
reset (eg. in .config_init). Kinda depends on taste and on how common
this behavior is in practise, so I thought the best is to reach out to
discuss.

There was a similar discussion recently about WoL settings getting
lost. The conclusion about that was the PHY should keep track of WoL
setting. So i would say the same applies there. Please store it in a
local priv structure.

      Andrew