Hi Steven
>which pin is the PPS pin on a imx8qxp processor？ the ENET0_REFCLK_125M_25M ALT2?
yes this is correct. For usage one can refer to sect.4.2 ENET IEEE-1588 i.MX Linux Reference Manual
unit test:
FSL-UT-IEEE1588-001.txt\doc\misc\test - imx-test - i.MX Driver Test Application Software
https://community.nxp.com/message/1233356
configuration example
How to add iMX8QXP PAD（GPIO) Wakeup
Best regards
igor
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