Re: [RFC PATCH net-next 7/9] net: dsa: microchip: ksz9477: add hardware time stamping support

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On Thu, Oct 22, 2020 at 02:39:35AM +0300, Vladimir Oltean wrote:
> So how _does_ that work for TI PHYTER?
> 
> As far as we understand, the PHYTER appears to autonomously mangle PTP packets
> in the following way:
> - subtracting t2 on RX from the correctionField of the Pdelay_Req
> - adding t3 on TX to the correctionField of the Pdelay_Resp

The Phyter does not support peer-to-peer one step.

The only driver that implements it is ptp_ines.c.

And *that* driver/HW implements it correctly.

Thanks,
Richard




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