[Linuxptp-users] time stamping accuracy of Freescale P2020

[Mozhdeh K. <kam...@gm...>]

Hi,

I thought it is better to open a new discussion for this topic :)

I am a bit getting confusion about accuracy of P2020 reference board. I
could not find any timestamping accuracy in its datasheet. Ii seems it uses

— 10/100/1000 BaseT Ethernet ports:
– eTSEC1, RGMII: four 10/100/1000 ports using Vitesse™ VSC7385 L2 switch
– eTSEC2, SGMII: one 10/100/1000 port using Vitesse™ VSC8221
– eTSEC3, RGMII: one 10/100/1000 port Vitesse™ VSC8641


I know VSC8221 and VSC8641, doesn't have hardware timestamping. But how
about VSC7385 L2 switch? I could not find in its datasheet, but maybe I
made a mistake!!

If none of these ports doesn't have hardware timestamping, how P2020 can be
accurate enough to even consider as a boundary clock?

-- 
*Mozhdeh *