PHY register test on Orange Pi One Plus (Allwinner H6)

U-Boot(2021.10) configuration

$ cp orangepi_one_plus_defconfig{,.orig}
$ echo "CONFIG_NET=y" >> orangepi_one_plus_defconfig
$ echo "CONFIG_SUN8I_EMAC=y" >> orangepi_one_plus_defconfig

build with ATF, no crust(SCP) firmware


---
U-Boot commands for test

# ensure syscon value is suitable for emac/external phy
mw 03000030 00050846
# enable PD6 as GPIO/output
mw 0300b06c 51555555
# PD6=high
mw 0300b07c 00000040
# check phy address=0x00-0x0f, register=3
mw 05020048 00300031; sleep 1; md 05020048 2
mw 05020048 00301031; sleep 1; md 05020048 2
mw 05020048 00302031; sleep 1; md 05020048 2
mw 05020048 00303031; sleep 1; md 05020048 2
mw 05020048 00304031; sleep 1; md 05020048 2
mw 05020048 00305031; sleep 1; md 05020048 2
mw 05020048 00306031; sleep 1; md 05020048 2
mw 05020048 00307031; sleep 1; md 05020048 2
mw 05020048 00308031; sleep 1; md 05020048 2
mw 05020048 00309031; sleep 1; md 05020048 2
mw 05020048 0030a031; sleep 1; md 05020048 2
mw 05020048 0030b031; sleep 1; md 05020048 2
mw 05020048 0030c031; sleep 1; md 05020048 2
mw 05020048 0030d031; sleep 1; md 05020048 2
mw 05020048 0030e031; sleep 1; md 05020048 2
mw 05020048 0030f031; sleep 1; md 05020048 2


---
result (example)
=> mw 03000030 00050846
=> mw 0300b06c 51555555
=> mw 0300b07c 00000040
=> mw 05020048 00300031; sleep 1; md 05020048 2
05020048: 00300030 0000c915                    0.0.....
=> mw 05020048 00301031; sleep 1; md 05020048 2
05020048: 00301030 0000ffff                    0.0.....
=> mw 05020048 00302031; sleep 1; md 05020048 2
05020048: 00302030 0000ffff                    0 0.....
=> mw 05020048 00303031; sleep 1; md 05020048 2
05020048: 00303030 0000ffff                    000.....
=> mw 05020048 00307031; sleep 1; md 05020048 2
05020048: 00307030 0000c915                    0p0.....
=> mw 05020048 00308031; sleep 1; md 05020048 2
05020048: 00308030 0000ffff                    0.0.....
=> mw 05020048 00309031; sleep 1; md 05020048 2
05020048: 00309030 0000ffff                    0.0.....
=> mw 05020048 0030a031; sleep 1; md 05020048 2
05020048: 0030a030 0000ffff                    0.0.....
=>