[Linuxptp-users] Hardware timestamping on the Raspberry Pi 4B

[Maxime L. <max...@gm...>]

Hello,

I'm following this issue on raspberry's github
https://github.com/raspberrypi/linux/issues/4151

The issue concerns the BCM54210E (or PE?) and the CM4 (a compute module
derived from the RPi4) which is in the same family of chip as the BCM54213E
(PE?) which is present.

The stock linux (5.10) currently only exposes SOF_TIMESTAMPING_TX_SOFTWARE,
yet the whole BCM5421xE family, I think, supports hardware timestamping.

https://www.broadcom.com/products/ethernet-connectivity/phy-and-poe/optical/bcm5421xe

Anyone here with more info on the matter?

Thank you very much!

Maxime