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DP83867IR: Can not read all the registers of ETH phy

Part Number: DP83867IR

Hello TI team,

We are using Eth-phy : DP83867IR with SOC AM6254.

Exact part number image given below.


Can not read or write any registers above the address 0x20, logs given below.

=> mii read 0 0x00-0x01A4
addr=00 reg=00 data=1940
addr=00 reg=01 data=7949
addr=00 reg=02 data=2000
addr=00 reg=03 data=A231
addr=00 reg=04 data=01E1
addr=00 reg=05 data=0000
addr=00 reg=06 data=0064
addr=00 reg=07 data=2001
addr=00 reg=08 data=0000
addr=00 reg=09 data=0300
addr=00 reg=0a data=4000
addr=00 reg=0b data=0000
addr=00 reg=0c data=0000
addr=00 reg=0d data=401F
addr=00 reg=0e data=0C1F
addr=00 reg=0f data=3000
addr=00 reg=10 data=5048
addr=00 reg=11 data=0002
addr=00 reg=12 data=0000
addr=00 reg=13 data=0040
addr=00 reg=14 data=29C7
addr=00 reg=15 data=0000
addr=00 reg=16 data=0000
addr=00 reg=17 data=0000
addr=00 reg=18 data=6150
addr=00 reg=19 data=4444
addr=00 reg=1a data=0002
addr=00 reg=1b data=0000
addr=00 reg=1c data=0000
addr=00 reg=1d data=0000
addr=00 reg=1e data=0002
addr=00 reg=1f data=0000
Error reading from the PHY addr=00 reg=20
Error reading from the PHY addr=00 reg=21
Error reading from the PHY addr=00 reg=22
Error reading from the PHY addr=00 reg=23
Error reading from the PHY addr=00 reg=24
Error reading from the PHY addr=00 reg=25
Error reading from the PHY addr=00 reg=26
Error reading from the PHY addr=00 reg=27
Error reading from the PHY addr=00 reg=28
Error reading from the PHY addr=00 reg=29
Error reading from the PHY addr=00 reg=2a
Error reading from the PHY addr=00 reg=2b
Error reading from the PHY addr=00 reg=2c
Error reading from the PHY addr=00 reg=2d
Error reading from the PHY addr=00 reg=2e
Error reading from the PHY addr=00 reg=2f
Error reading from the PHY addr=00 reg=30
Error reading from the PHY addr=00 reg=31
Error reading from the PHY addr=00 reg=32
Error reading from the PHY addr=00 reg=33
Error reading from the PHY addr=00 reg=34
Error reading from the PHY addr=00 reg=35
Error reading from the PHY addr=00 reg=36
Error reading from the PHY addr=00 reg=37
Error reading from the PHY addr=00 reg=38
Error reading from the PHY addr=00 reg=39
Error reading from the PHY addr=00 reg=3a
Error reading from the PHY addr=00 reg=3b
Error reading from the PHY addr=00 reg=3c
Error reading from the PHY addr=00 reg=3d
Error reading from the PHY addr=00 reg=3e
Error reading from the PHY addr=00 reg=3f
Error reading from the PHY addr=00 reg=40
Error reading from the PHY addr=00 reg=41
Error reading from the PHY addr=00 reg=42
Error reading from the PHY addr=00 reg=43
Error reading from the PHY addr=00 reg=44
Error reading from the PHY addr=00 reg=45
Error reading from the PHY addr=00 reg=46
Error reading from the PHY addr=00 reg=47
Error reading from the PHY addr=00 reg=48
Error reading from the PHY addr=00 reg=49
Error reading from the PHY addr=00 reg=4a
Error reading from the PHY addr=00 reg=4b
Error reading from the PHY addr=00 reg=4c
Error reading from the PHY addr=00 reg=4d
Error reading from the PHY addr=00 reg=4e
Error reading from the PHY addr=00 reg=4f
Error reading from the PHY addr=00 reg=50
Error reading from the PHY addr=00 reg=51
Error reading from the PHY addr=00 reg=52
Error reading from the PHY addr=00 reg=53
Error reading from the PHY addr=00 reg=54
Error reading from the PHY addr=00 reg=55
Error reading from the PHY addr=00 reg=56
Error reading from the PHY addr=00 reg=57
Error reading from the PHY addr=00 reg=58
Error reading from the PHY addr=00 reg=59
Error reading from the PHY addr=00 reg=5a
Error reading from the PHY addr=00 reg=5b
Error reading from the PHY addr=00 reg=5c
Error reading from the PHY addr=00 reg=5d
Error reading from the PHY addr=00 reg=5e
Error reading from the PHY addr=00 reg=5f
Error reading from the PHY addr=00 reg=60
Error reading from the PHY addr=00 reg=61
Error reading from the PHY addr=00 reg=62
Error reading from the PHY addr=00 reg=63
Error reading from the PHY addr=00 reg=64
Error reading from the PHY addr=00 reg=65
Error reading from the PHY addr=00 reg=66
Error reading from the PHY addr=00 reg=67
Error reading from the PHY addr=00 reg=68
Error reading from the PHY addr=00 reg=69
Error reading from the PHY addr=00 reg=6a
Error reading from the PHY addr=00 reg=6b
Error reading from the PHY addr=00 reg=6c
Error reading from the PHY addr=00 reg=6d
Error reading from the PHY addr=00 reg=6e
Error reading from the PHY addr=00 reg=6f
Error reading from the PHY addr=00 reg=70
Error reading from the PHY addr=00 reg=71
Error reading from the PHY addr=00 reg=72
Error reading from the PHY addr=00 reg=73
Error reading from the PHY addr=00 reg=74
Error reading from the PHY addr=00 reg=75
Error reading from the PHY addr=00 reg=76
Error reading from the PHY addr=00 reg=77
Error reading from the PHY addr=00 reg=78
Error reading from the PHY addr=00 reg=79
Error reading from the PHY addr=00 reg=7a
Error reading from the PHY addr=00 reg=7b
Error reading from the PHY addr=00 reg=7c
Error reading from the PHY addr=00 reg=7d
Error reading from the PHY addr=00 reg=7e
Error reading from the PHY addr=00 reg=7f
Error reading from the PHY addr=00 reg=80
Error reading from the PHY addr=00 reg=81
Error reading from the PHY addr=00 reg=82
Error reading from the PHY addr=00 reg=83
Error reading from the PHY addr=00 reg=84
Error reading from the PHY addr=00 reg=85
Error reading from the PHY addr=00 reg=86
Error reading from the PHY addr=00 reg=87
Error reading from the PHY addr=00 reg=88
Error reading from the PHY addr=00 reg=89
Error reading from the PHY addr=00 reg=8a
Error reading from the PHY addr=00 reg=8b
Error reading from the PHY addr=00 reg=8c
Error reading from the PHY addr=00 reg=8d
Error reading from the PHY addr=00 reg=8e
Error reading from the PHY addr=00 reg=8f
Error reading from the PHY addr=00 reg=90
Error reading from the PHY addr=00 reg=91
Error reading from the PHY addr=00 reg=92
Error reading from the PHY addr=00 reg=93
Error reading from the PHY addr=00 reg=94
Error reading from the PHY addr=00 reg=95
Error reading from the PHY addr=00 reg=96
Error reading from the PHY addr=00 reg=97
Error reading from the PHY addr=00 reg=98
Error reading from the PHY addr=00 reg=99
Error reading from the PHY addr=00 reg=9a
Error reading from the PHY addr=00 reg=9b
Error reading from the PHY addr=00 reg=9c
Error reading from the PHY addr=00 reg=9d
Error reading from the PHY addr=00 reg=9e
Error reading from the PHY addr=00 reg=9f
Error reading from the PHY addr=00 reg=a0
Error reading from the PHY addr=00 reg=a1
Error reading from the PHY addr=00 reg=a2
Error reading from the PHY addr=00 reg=a3
Error reading from the PHY addr=00 reg=a4
=> 


=> mii info
PHY 0x00: OUI = 0x80028, Model = 0x23, Rev = 0x01, 100baseT, FDX
PHY 0x01: OUI = 0x80028, Model = 0x23, Rev = 0x01, 10baseT, HDX
=>

It's not connecting with 1000baseT.

Please guide us on the same


Thanks and regards,
Ishan