netdev - Re: [PATCH 2/4 net-next] tg3: PTP - Implement the ptp api and ethtool functions

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Message-ID: <20121204075318.GB2261@netboy.at.omicron.at>
Date:	Tue, 4 Dec 2012 08:53:18 +0100
From:	Richard Cochran <richardcochran@...il.com>
To:	Nithin Nayak Sujir <nsujir@...adcom.com>
Cc:	Michael Chan <mchan@...adcom.com>, davem@...emloft.net,
	netdev@...r.kernel.org
Subject: Re: [PATCH 2/4 net-next] tg3: PTP - Implement the ptp api and
 ethtool functions

On Mon, Dec 03, 2012 at 01:52:16PM -0800, Nithin Nayak Sujir wrote:
> 
> Yes, the hardware does seem to be different from what you describe
> but I think the conversion is right. I tested this with ptp4l in a
> back-to-back configuration and observed convergence of the master
> offset to ~0. Without this code, the offset keeps increasing.

Okay, thanks, just asking.

It appears that this works just like the IGB. The register value is a
binary fraction of the increment value, and not an addend as I
assumed.

Thanks,
Richard
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