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Date:   Mon, 20 Jul 2020 17:29:22 -0700
From:   Richard Cochran <>
To:     Vladimir Oltean <>
Subject: Re: [PATCH net-next 2/2] testptp: add new options for perout phase
 and pulse width

On Mon, Jul 20, 2020 at 08:55:59PM +0300, Vladimir Oltean wrote:
> Extend the example program for PTP ancillary functionality with the
> ability to configure not only the periodic output's period (frequency),
> but also the phase and duty cycle (pulse width) which were newly
> introduced.
> The ioctl level also needs to be updated to the new PTP_PEROUT_REQUEST2,
> since the original PTP_PEROUT_REQUEST doesn't support this
> functionality. For an in-tree testing program, not having explicit
> backwards compatibility is fine, as it should always be tested with the
> current kernel headers and sources.
> Tested with an oscilloscope on the felix switch PHC:
> echo '2 0' > /sys/class/ptp/ptp1/pins/switch_1588_dat0
> ./testptp -d /dev/ptp1 -p 1000000000 -w 100000000 -H 1000 -i 0
> Signed-off-by: Vladimir Oltean <>

Thanks for following up with this!

Acked-by: Richard Cochran <>

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