Dennis Lee Bieber  wrote:
> On Mon, 29 Jul 2019 00:32:15 -0700 (PDT), heiko.bruckmeyer@gmail.com
> declaimed the following:
>
> >Hello,
> >
> >can anyone tell me if the new RaspberryPi4 is capable of hardware
> > timestamping according to IEEE1588/PTP?
> >
>
>         I highly doubt it... Given the requirements for
> http://home.mit.bme.hu/~khazy/ptpd/ (namely, NIC having 1588 hardware
> assist -- while the R-Pi4 provides a faster network interface, I doubt it
> includes special hardware at this price point -- the 82580 chip is $17
> alone when ordering 200+ units).

It's unclear which ethernet MAC the Pi4 is actually using - we know it uses
the Broadcom GENET driver, which is used by some BCM7xxx set top box chips,
but as usual with Broadcom we don't get any documentation.  The Linux driver
is pretty minimal and doesn't do much beyond transferring packets.

Until such time as more data comes out, I don't think we'll be any the
wiser.

Theo

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