netdev - Re: [PATCH net-next 0/3] Fully describe the waveform for PTP periodic output

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Message-ID: <66d9ad0f-d808-77af-290a-ce1a4b3417e1@intel.com>
Date:   Thu, 16 Jul 2020 14:31:30 -0700
From:   Jacob Keller <jacob.e.keller@...el.com>
To:     Vladimir Oltean <olteanv@...il.com>, kuba@...nel.org,
        davem@...emloft.net, netdev@...r.kernel.org
Cc:     richardcochran@...il.com, yangbo.lu@....com,
        xiaoliang.yang_1@....com, po.liu@....com,
        UNGLinuxDriver@...rochip.com
Subject: Re: [PATCH net-next 0/3] Fully describe the waveform for PTP periodic
 output



On 7/16/2020 2:20 PM, Vladimir Oltean wrote:
> While using the ancillary pin functionality of PTP hardware clocks to
> synchronize multiple DSA switches on a board, a need arised to be able
> to configure the duty cycle of the master of this PPS hierarchy.
> 
> Also, the PPS master is not able to emit PPS starting from arbitrary
> absolute times, so a new flag is introduced to support such hardware
> without making guesses.
> 
> With these patches, struct ptp_perout_request now basically describes a
> general-purpose square wave.

Nice!

> 
> Vladimir Oltean (3):
>   ptp: add ability to configure duty cycle for periodic output
>   ptp: introduce a phase offset in the periodic output request
>   net: mscc: ocelot: add support for PTP waveform configuration
> 
>  drivers/net/ethernet/mscc/ocelot_ptp.c | 74 +++++++++++++++++---------
>  drivers/ptp/ptp_chardev.c              | 33 +++++++++---
>  include/uapi/linux/ptp_clock.h         | 34 ++++++++++--
>  3 files changed, 107 insertions(+), 34 deletions(-)
>