netdev - Re: [PATCH net-next V3 0/2] igb: ptp hardware clock

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Date:	Sat, 07 Jan 2012 17:02:39 -0800
From:	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To:	Richard Cochran <richardcochran@...il.com>
Cc:	netdev@...r.kernel.org, e1000-devel@...ts.sourceforge.net,
	Jacob Keller <jacob.e.keller@...el.com>,
	John Ronciak <john.ronciak@...el.com>,
	John Stultz <john.stultz@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH net-next V3 0/2] igb: ptp hardware clock

On Sat, 2012-01-07 at 20:38 +0100, Richard Cochran wrote:
> * ChangeLog
> ** V3
>    - Driver compiles even without CONFIG_PTP_1588_CLOCK.
>    - Timestamping always works, even when PTP code missing or fails.
> ** V2
>    - Fixed wrong bit shifting in the 82576 code.
>    - Explained the timestamp locking with a comment in the code.
>    - Preserved the comments from the original timecompare
> implementation.
>    - Added an additional test within the overflow counter code to fix
>      a race condition. Details of the problem are given in the commit
>      message.
> 
> This patch series implements a PHC driver for the Intel 82576 and
> 82580 devices, as part of the igb driver.
> 
> The first patch adds the PHC driver code as a new source module but
> does not link it into the main igb driver. Because the system time
> counter is not so very wide, the code implements an overflow counter
> in software. Every read operation maintains the overflow counter, as
> does a "delayed work" watchdog. Only the base clock operations are
> implemented. The hardware does have some ancillary features, but these
> can be easily added later.
> 
> The second patch removes the timecompare code and links in the new
> functions.
> 
> I have tested the 82580 with good results. However, I don't have the
> 82576 and so would appreciate testing and feedback.
> 
> Thanks,
> Richard 

Thanks Richard, I will add this series to my queue.

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