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AM5728: Ethernet PHY configuration

Shreek
Intellectual 990 points
Part Number: AM5728


Hi,

I designed my am5728 board based on AM57XEVM, but ar8031 is used on my board, and the phy init pin is connected to gpio3_29. And I know ksz9031 is used on am57xevm and phy init pin is connected to gpio7_26, what should i do to make the ethernet work? 

  • 0
    TI__Guru**** 393215 points

    Hi,

    Please post which Linux version you are using.

  • 0 in reply to Biser Gatchev-XID
    Intellectual 990 points

    Hi,

    I'm using sdk ti-processor-sdk-linux-am57xx-evm-04.01.00.06.

  • 0 in reply to Shreek
    TI__Mastermind 40240 points

    Hi,

    I am not sure I have enough information to answer your question. Which interface are you using for example such as CPSW or PRU-ETH and which TI DTS file you are referencing.

    I will try to answer based on assuming here that you are asking about how to use the reset line that is tied to the GPIO.

    Please take a look at the dtsi file used on the AM57x IDK class boards, here is the path to the dtsi file in the linux source tree:

    arch/arm/boot/dts/am57xx-idk-common.dtsi.

    In the above file look at the appended node pruss2_mdio. You will see the same gpio line tied to both PHYs on the PRU in the interrupt parent field. Remember to set the pin mux for the gpio that you want to use. 

    Best Regards,

    Schuyler