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On some but not all devices using the RTL8221B 2.5GBit/s PHY the SerDes setup sequence may hang under some circumstances (eg. <2500M link partner present during boot). RTL8221B-VB-CG 2.5Gbps PHY (C45) mdio-bus:01: rtl822xb_config_init failed: -110 Work-around the issue by performing a hardware reset and subsequent retry of the SerDes setup, which seems to always succeed. Doing this requires moving ALDPS setup to config_init (which is anyway the better place for that) as it otherwise doesn't survive the reset. Also disable listening on MDIO address 0 which may be used by other PHYs despite being spec'ed as "broadcast address", as bus activity on address 0 may otherwise confuse the RealTek PHY for good reasons. Tested-by: Luis Mita <luis@luismita.com> Signed-off-by: Daniel Golle <daniel@makrotopia.org>