Part Number: AM4376
Hi Team,
We are facing an issue with PHY reset after migrating our platform from Linux Kernel 5.10.10 to Linux Kernel 6.12.After migration to Kernel 6.12, the PHY reset sequence is not functioning as expected.Due to this, the Ethernet PHY is not being properly initialized after /reset.
root@am437x-evm:~# ifconfig
eth0 Link encap:Ethernet HWaddr 90:06:F2:45:E7:CD
inet6 addr: fe80::9206:f2ff:fe45:e7cd/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:4 errors:0 dropped:0 overruns:0 frame:0
TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:240 (240.0 B) TX bytes:516 (516.0 B)
eth1 Link encap:Ethernet HWaddr 5E:6A:53:2A:9C:61
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:6 errors:0 dropped:0 overruns:0 frame:0
TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:300 (300.0 B) TX bytes:300 (300.0 B)
root@am437x-evm:~# phytool write eth0/0x0/0x1F 0x8000
error: phy_write (-95)
root@am437x-evm:~# phytool write eth1/0x1/0x1F 0x8000
error: phy_write (-95)
root@am437x-evm:~# phytool write eth0/0x0/0x1F 0x0000
error: phy_write (-95)
root@am437x-evm:~# ^C
root@am437x-evm:~# uname -a
Linux am437x-evm 6.12.49 #1 Mon Oct 12 11:40:34 IST 2026 armv7l GNU/Linux
root@am437x-evm:~# ^C
root@am437x-evm:~# Please see log
