In the past, all the configuration of SerDes and PHYs on the realtek
switches were done using u-boot (`rtk init`). But since RTL930x switched
to SerDes configuration under Linux, the SoC side is no longer using the
Realtek-proprietary variant of USXGMII. The communication to the RTL8261N
PHYs on those switches broke because of this incompatibility.
Enabling the full initialization on `CONFIG_MACH_REALTEK_RTL` converts also
the PHY side to the standard USXGMII and therefore ensures that both sides
speak the same dialect.
Co-authored-by: Jonas Jelonek <jelonek.jonas@gmail.com>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Link: https://github.com/openwrt/openwrt/pull/23076
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
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