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AM5728: [DP83822I Ethernet porting] How to get PHY registers on userspace

Part Number: AM5728
Other Parts Discussed in Thread: DP83822I,

As title, we change to DP83822I PHY on AM5728 board but got failed, we have no idea it is hardware issue or software issue.

OS: TI Linux SDK

Kernel: 4.4.12

We know we can get phy registers content from mii command of u-boot, but we want to check phy registers after driver initialization, what is suitable tool?

I checked a TI document which is about DP83822 porting on AM335X, it is use devmem2 command to read phy registers, but I'm so confuse how to load all registers, even if I read TRM, I still don't know how to read on AM5728:

Please give me some directions, thanks