linux-kernel - Re: [PATCH net-next] ptp: add vclock timestamp conversion IOCTL

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Message-ID: <20211013175405.GB24542@hoboy.vegasvil.org>
Date:   Wed, 13 Oct 2021 10:54:05 -0700
From:   Richard Cochran <richardcochran@...il.com>
To:     Sebastien Laveze <sebastien.laveze@....nxp.com>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        yangbo.lu@....com, yannick.vignon@....nxp.com,
        rui.sousa@....nxp.com
Subject: Re: [PATCH net-next] ptp: add vclock timestamp conversion IOCTL

On Wed, Oct 13, 2021 at 03:28:12PM +0200, Sebastien Laveze wrote:
> On Wed, 2021-10-13 at 06:10 -0700, Richard Cochran wrote:
> > That means no control over the phase of the output signals.  Super.
> 
> You have. There's just a small conversion to go from and to the low-
> level hardware counter. (Which also needs to be done for rx/tx
> timestamps btw) 
> When programming an output signal you use this offset to have the right
> phase.

I have an i210 with 2 periodic output channels.  How am I supposed to
generate signals from two different virtual PTP clocks?

Thanks,
Richard