Fritzbox 7362 (SL) OpenWrt port

Jep, there definitly is a regression with the xrx200 switch.

OpenWrt 19.07.7 Kernel 4.14.221 supports ports 3 + 4
Openwrt 21.02.0-rc1 Kernel 5.4.111 ports 3 + 4 are dead

root@OpenWrt:~# dmesg|grep -A5 -B5 PHY
[    0.163028] pinctrl core: initialized pinctrl subsystem
[    0.170653] NET: Registered protocol family 16
[    0.183980] dcdc-xrx200 1f106a00.dcdc: Core Voltage : 1016 mV
[    0.198588] pinctrl-xway 1e100b10.pinmux: Init done
[    0.205140] dma-xway 1e104100.dma: Init done - hw rev: 7, ports: 7, channels: 28
[    0.216895] pcie-xrx200 1d900000.pcie: failed to get the PCIe PHY
[    0.265910] usbcore: registered new interface driver usbfs
[    0.271499] usbcore: registered new interface driver hub
[    0.276869] usbcore: registered new device driver usb
[    0.282522] workqueue: max_active 576 requested for napi_workq is out of range, clamping between 1 and 512
[    0.294467] clocksource: Switched to clocksource MIPS
--
[    0.708199] NET: Registered protocol family 10
[    0.715876] Segment Routing with IPv6
[    0.718218] NET: Registered protocol family 17
[    0.722769] bridge: filtering via arp/ip/ip6tables is no longer available by default. Update your scripts to load br_netfilter if you need this.
[    0.735555] 8021q: 802.1Q VLAN Support v1.8
[    0.746142] pcie-xrx200 1d900000.pcie: failed to get the PCIe PHY
[    0.859313] libphy: lantiq,xrx200-mdio: probed
[    0.869051] net-xrx200: invalid MAC, using random
[    0.872575] Atheros 8030 ethernet 0:00: attached PHY driver [Atheros 8030 ethernet] (mii_bus:phy_addr=0:00, irq=POLL)
[    0.883256] Atheros 8030 ethernet 0:01: attached PHY driver [Atheros 8030 ethernet] (mii_bus:phy_addr=0:01, irq=POLL)
[    0.894242] Intel XWAY PHY11G (xRX v1.2 integrated) 0:11: attached PHY driver [Intel XWAY PHY11G (xRX v1.2 integrated)] (mii_bus:phy_addr=0:11, irq=POLL)
[    0.907971] Intel XWAY PHY11G (xRX v1.2 integrated) 0:13: attached PHY driver [Intel XWAY PHY11G (xRX v1.2 integrated)] (mii_bus:phy_addr=0:13, irq=POLL)
[    1.046546] PCI host bridge /fpi@10000000/pcie@d900000 ranges:
[    1.051221] PCI host bridge to bus 0000:00
[    1.055083] pci_bus 0000:00: root bus resource [mem 0x1c000000-0x1cffffff]
[    1.061969] pci_bus 0000:00: root bus resource [io  0x1d800000-0x1d8fffff]
[    1.068840] pci_bus 0000:00: root bus resource [??? 0x00000000 flags 0x0]

Notably might be the line ”failed to get the PCIe PHY“ which does not appear in 19.07.7.