> 
> Hi Igor
> 
> Can you point to some section of the PHY datasheet? I could not find
> anything which fit the vague description you have of this feature in
> your patch. Maybe Heiner or I can implement and verify the PHY driver
> using this feature.

Will try to findout. Not found in customer datasheets yet.

> Since this feature can be implemented directly in the PHY driver, and
> indirectly via the MAC in firmware, it would be good to have a uniform
> interface to do this. So please do add a PHY tunable via MAC driver.

Yep, had the same thought. Will do.

> Does the MAC also have the ability to configure PHY downshift? You
> could implement that tunable as well.

Right, its also possible and this is what I'm thinking on as well.

This will require a minor change in ethtool infrastructure code to allow
MAC driver to handle phy tunable requests.

Regards,
  Igor

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