netdev - [PATCH v2 net-next 0/2] timestamping support for gianfar

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Date:	Fri, 9 Apr 2010 11:09:25 +0200
From:	Manfred Rudigier <Manfred.Rudigier@...cron.at>
To:	"'netdev@...r.kernel.org'" <netdev@...r.kernel.org>,
	"'linuxppc-dev@...ts.ozlabs.org'" <linuxppc-dev@...ts.ozlabs.org>
CC:	"'sandeep.kumar@...escale.com'" <sandeep.kumar@...escale.com>,
	"'David Miller'" <davem@...emloft.net>,
	"'Scott Wood'" <scottwood@...escale.com>
Subject: [PATCH v2 net-next 0/2] timestamping support for gianfar

On 2010-04-07 Manfred Rudigier wrote:
> this patch series adds support for hardware time stamping to gianfar. It uses
> the new SO_TIMESTAMPING infrastructure to deliver raw hardware timestamps to
> user space applications.
> 
> Freescale CPUs with an eTSEC are able to time stamp all incoming network packets
> and can also time stamp transmit packets when instructed. The time stamps are
> generated by the eTSEC timer clock module which is running either from an
> external oscillator or internal clock.
> 
> The submitted patches do not initialize the timer clock module since the
> oscillator frequency might be different from board to board. Thus the user
> must configure the timer clock module by hand at the moment - otherwise no
> time stamps will be reported. Below is a simple example code which
> shows how to configure the timer clock module on the P2020DS/RDB. It can be
> used to quickly try out the patches.
> 
> Testing was done with the time stamping program from Patrick Ohly which can
> be found in the kernel sources under Documentation/networking/timestamping.
> I have verified the functionality on the MPC8313RDB, P2020DS and P2020RDB
> board with the latest net-2.6 kernel. Send and receive time stamps could be
> retrieved on all eTSEC ports.

Hello,

I've modified the patches according to your comments so far. 

Version 2 changes:
- Only two instead of four patches so every patch adds some useful functionality
- hwts_rx_en and hwts_tx_en are no bitfields any more

Manfred
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