Hello Vladimir,

On Thu, 9 Mar 2023 01:03:21 +0200
Vladimir Oltean [off-list ref] wrote:

(trimmed CC list of bouncing email addresses)

  
Thanks, I will be more careful on next patch series version.
 

From previous discussions, I believe that a device tree property was
added in order to prevent perceived performance regressions when
timestamping support is added to a PHY driver, correct?

Yes, i.e. to select the default and better timestamp on a board.
 

I have a dumb question: if updating the device trees is needed in order
to prevent these behavior changes, then how is the regression problem
addressed for those device trees which don't contain this new property
(all device trees)?

On that case there is not really solution, but be aware that
CONFIG_PHY_TIMESTAMPING need to be activated to allow timestamping on the PHY.
Currently in mainline only few (3) defconfig have it enabled so it is really
not spread, maybe I could add more documentation to prevent further regression
issue when adding support of timestamp to a PHY driver.

Regards,
Köry