Re: [BISECTED] v4.5-rc1 phylib regression

quoted

Nope, not an option. Only a small number of DTB actually use c22 or
c45. The majority of devices have no compatible at all. Why should
they, the binding documentation says it is optional!

So one thing that can be done is to just have a whitelist in the
driver that we add the known phy compatibles to, with a nice comment
above that this should only be for legacy device trees.

So you mean drivers/of/of_mdio.c:of_mdiobus_child_is_phy()
has a white list like:

"brcm,40nm-ephy"
"marvell,88E1111", 
"marvell,88e1116",
"marvell,88e1118",
"marvell,88e1149r",
"marvell,88e1310",
"marvell,88E1510",
"marvell,88E1514",
"moxa,moxart-rtl8201cp",

Yes, that would work.

We should also update the binding documentation to limit what is legal
in the compatible string.

   Andrew