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Original question:

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

AM5728: AM5728: [DP83822I Ethernet porting] 100Mb works but cannot change to 10Mb

Kobe Bryant
Prodigy 20 points
Part Number: AM5728


As title, finally we get 100Mb speed works, the key is about the boot strap configuration of hardware design.

And it use a external crystal with 25MHz.

According to this setting, we set cpsw as RGMII mode, and it works using udhcpc command.

But we trying to change to 10Mb speed using ethtool, it can change but interface (eth0) doesn't works (no response using udhcpc command)

My question is this case is use RGMII with 10/100Mb speed, my configuration does support 10M speed? Or just 100M only.

please give me some directions if can change to 10M mode, thanks a lot

  • +1
    TI__Mastermind 39940 points

    Hi,

    Sorry but I did not get the question exactly. Can you confirm that your question are the following:

    1. Can you change the mode of the phy10M from software
    2. Is there some modifications required in hardware with the pull up - pull down register configuration you have to change to 10M link

    Regards,
    Tanmay