Re: [Linuxptp-users] Clarification about Driver Compatibility Matrix

[Ledda W. E. <Wil...@it...>]

Thanks Richard. I can therefore conclude that if I have support for PHC means that the interface supports time stamping hardware (on MAC or PHY)? 
Sorry if I insist on this, maybe the question is stupid, but I cannot have doubts about.

Thanks a lot.

William


-----Original Message-----
From: Richard Cochran [mailto:ric...@gm...] 
Sent: 06 August 2013 09:18
To: Ledda William EXT
Cc: lin...@li...
Subject: Re: [Linuxptp-users] Clarification about Driver Compatibility Matrix

On Mon, Aug 05, 2013 at 04:32:14PM +0000, Ledda William EXT wrote:

> Sorry Richard, but I'm stiil a bit confused about the meaning of the 
> PHY column. Let me make an example, I have a i350 that has the igb 
> driver. I read from the table the following table:
>
> Driver        Hardware                SOTS    PHC     PHY     VER
> igb           Intel 82576, 82580      RAW     Y       NA      3.5
> 
> In this case, this means that I have a PTP-capable PHY attached to PTP-capable MAC?

The PHY column reads "NA" meaning "Not Applicable." Even if you attach a PTP capable PHY (like the National Semiconductor PHYTER) to your
i350 MAC, still you will never get any time stamps from the PHY, as the MAC driver will intercept the SIOCSHWTSTAMP ioctl.

HTH,
Richard