AM67A: How to configure the PHY and switch during the initialization of the Ethernet network

zhaohang lai

Part Number: AM67A

Tool/software:

Currently, our equipment has a PHY chip and a switch chip. The address of the PHY chip is configured externally as 1, while the address of the switch is only 0.
Challenge: phy has a broadcast address of 0, which prevents AM67A from being able to use the switch in the system. Therefore, I need to disable the broadcast address 0 of the phy chip through mdio before initializing the Ethernet. I already know the configuration parameters of the register, but I'm not sure how to implement them in the driver.How should I modify the driver?

1 month ago

0 Doredla Sudheer Kumar 1 month ago

TI__Guru 64200 points

Hi,

You can use PHY with address 0. The valid range of PHY address are from 0 to 31.

Based on PHY ID, corresponding driver will be invoked.

You need map switch & PHY correctly under CPSW Port nodes.

Best Regards,
Sudheer

0 zhaohang lai 1 month ago in reply to Doredla Sudheer Kumar

Prodigy 130 points

Hi Sudheer,
What I mean is that I have set the phy chip address to 3, but it still responds to address 0. So I need to disable the response to address 0 in the register in advance. Where should I incorporate this operation into the driver?

0 Doredla Sudheer Kumar 1 month ago in reply to zhaohang lai

TI__Guru 64200 points

Hi,

Usually, the PHY address defined under MDIO node alone mapped to MAC Port.

Can you please check with PHY vendor once.

Can you please confirm, are you using Native Linux driver for CPSW3G.

Best Regards,
Sudheer

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AM67A: How to configure the PHY and switch during the initialization of the Ethernet network