linux-kernel - RE: [PATCH] net: lan743x_ptp: convert to ktime_get_clocktai

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Message-ID: <90A7E81AE28BAE4CBDDB3B35F187D2644073E9C4@CHN-SV-EXMX02.mchp-main.com>
Date:   Wed, 15 Aug 2018 18:03:51 +0000
From:   <Bryan.Whitehead@...rochip.com>
To:     <arnd@...db.de>,
        <UNGLinuxDriver@...rochipTechnology.Mail.Onmicrosoft.com>
CC:     <davem@...emloft.net>, <yuehaibing@...wei.com>,
        <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] net: lan743x_ptp: convert to ktime_get_clocktai_ts64

> 
> Question: this is the only ptp driver that sets the hardware time to the
> current system time in TAI. Why does it do that?

This is done when the driver starts up after reset. Otherwise the clock is off by 48 years. 
It seemed to me that the system time was the most appropriate clock to sync to. 
If my reasoning is incorrect, please enlighten me.

Thanks,
Bryan