TDA4VM: Does PHY link status is required to read or write to PHY register?

Hi,

Manisha Narayana Gowda said:

of LinkUp status. Is it necessary to check the link up status to read or write to PHY register?

No, It is not necessary to Link Up to configure the PHY.
After MAC Port open "EnetPhy_open" will be called and initialize the PHY state Machine and bind the PHY driver with PHY.
During the PHY Sequence, PHY Config will be invoked.

For all the above activities, PHY Alive is sufficient. No need of Link Up.
In case of boot strapped PHY or FORCE Link Link Up us required and PHY config will not be invoked as PHY is strapped/forced with configuration required.

Best Regards,
Sudheer

Hi,
Based on your answer, I understand that there is no need to check the link state of PHY while reading or writing the data to PHY register. Please confirm this.

Regards
Thank You

Hi,

Manisha Narayana Gowda said:

Based on your answer, I understand that there is no need to check the link state of PHY while reading or writing the data to PHY register. Please confirm this.

Yes, PHY Alive is fine for the indication of PHY is active and connected.
Once PHY is active and connected, you can read/write PHY registers.

Best Regards,
Sudheer