netdev - Re: [PATCH net-next 2/3] ptp: igb: Use the high resolution frequency method.

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Message-ID: <20161109131511.GB6491@localhost.localdomain>
Date:   Wed, 9 Nov 2016 14:15:11 +0100
From:   Richard Cochran <richardcochran@...il.com>
To:     "Keller, Jacob E" <jacob.e.keller@...el.com>
Cc:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "Manfred.Rudigier@...cron.at" <Manfred.Rudigier@...cron.at>,
        "ulrik.debie-os@...ig.org" <ulrik.debie-os@...ig.org>,
        "stefan.sorensen@...ctralink.com" <stefan.sorensen@...ctralink.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "Kirsher, Jeffrey T" <jeffrey.t.kirsher@...el.com>,
        "john.stultz@...aro.org" <john.stultz@...aro.org>,
        "intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>
Subject: Re: [PATCH net-next 2/3] ptp: igb: Use the high resolution frequency
 method.

On Tue, Nov 08, 2016 at 10:04:23PM +0000, Keller, Jacob E wrote:
> Additionally, what about min/max frequency check? Wouldn't this need to
> be updated for the new adjfine operation?

In theory you might increase the max by some sub-ppb value, but we
cannot express that as the resolution of the user space interface is
in ppb, and that little extra is not important anyhow.

Thanks,
Richard