Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Date:   Wed, 19 Oct 2022 19:13:27 -0700
From:   Jakub Kicinski <kuba@kernel.org>
To:     wei.fang@nxp.com
Cc:     davem@davemloft.net, edumazet@google.com, pabeni@redhat.com,
        netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
        frank.li@nxp.com
Subject: Re: [PATCH net-next] net: fec: Add support for periodic output
 signal of PPS
Message-ID: <20221019191327.34018fdc@kernel.org>
In-Reply-To: <20221019050808.3840206-1-wei.fang@nxp.com>
References: <20221019050808.3840206-1-wei.fang@nxp.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Precedence: bulk

On Wed, 19 Oct 2022 13:08:08 +0800 wei.fang@nxp.com wrote:
> From: Wei Fang <wei.fang@nxp.com>
> 
> This patch adds the support for configuring periodic output
> signal of PPS. So the PPS can be output at a specified time
> and period.
> For developers or testers, they can use the command "echo
> <channel> <start.sec> <start.nsec> <period.sec> <period.
> nsec> > /sys/class/ptp/ptp0/period" to specify time and  
> period to output PPS signal.
> Notice that, the channel can only be set to 0. In addtion,
> the start time must larger than the current PTP clock time.
> So users can use the command "phc_ctl /dev/ptp0 -- get" to
> get the current PTP clock time before.

You need to CC Richard C the PTP maintainer on PTP-related
patches, please repost.