From: Stephan Gatzka <stephan@gatzka.org>
To: john stultz <johnstul@us.ibm.com>
Cc: Arnd Bergmann <arnd@arndb.de>,
netdev@vger.kernel.org,
Richard Cochran <richardcochran@gmail.com>,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
Rodolfo Giometti <giometti@linux.it>,
devicetree-discuss@lists.ozlabs.org,
linux-arm-kernel@lists.infradead.org,
Krzysztof Halasa <khc@pm.waw.pl>
Subject: Re: [PATCH 1/5] ptp: Added a brand new class driver for ptp clocks.
Date: Tue, 24 Aug 2010 20:30:31 +0200 [thread overview]
Message-ID: <4C740FC7.90106@gatzka.org> (raw)
In-Reply-To: <1282594125.3111.344.camel@localhost.localdomain>
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Hello!
> I'm curious if its possible to do the PTP hardware offset/adjustment
> calculation in a module internally to the kernel? That would allow the
> PPS interface to still be used to sync the system time, and not expose
> additional interfaces.
Just my 2 cents on this issue. PTP is very often used in embedded
systems, where the PTP timestamps will go into some dedicated hardware,
for instance an FPGA.
I'm currently working on a project where it is not necessary to adjust
the Linux system time via PTP (although it would be a nice to have), but
we only need the timestamps from the PHY to put them into our FPGA
device. So we need some kind of API to access the PTP timestamp registers.
Kind regards,
Stephan
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next prev parent reply other threads:[~2010-08-24 18:30 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-16 11:17 [PATCH v5 0/5] ptp: IEEE 1588 clock support Richard Cochran
2010-08-16 11:17 ` [PATCH 1/5] ptp: Added a brand new class driver for ptp clocks Richard Cochran
2010-08-16 14:26 ` Arnd Bergmann
2010-08-16 19:00 ` Richard Cochran
2010-08-16 19:59 ` Arnd Bergmann
2010-08-17 8:32 ` Richard Cochran
2010-08-17 9:25 ` Arnd Bergmann
2010-08-17 10:52 ` Richard Cochran
2010-08-17 11:36 ` Arnd Bergmann
2010-08-18 0:40 ` john stultz
2010-08-18 14:04 ` Richard Cochran
2010-08-18 15:02 ` Arnd Bergmann
2010-08-19 9:22 ` Richard Cochran
2010-08-19 12:29 ` Arnd Bergmann
2010-08-19 15:23 ` Ira W. Snyder
2010-08-19 15:48 ` Arnd Bergmann
2010-08-16 19:24 ` john stultz
2010-08-16 19:38 ` john stultz
2010-08-17 8:53 ` Richard Cochran
2010-08-18 0:22 ` john stultz
2010-08-18 7:19 ` Richard Cochran
2010-08-19 0:12 ` john stultz
2010-08-19 5:55 ` Richard Cochran
2010-08-19 12:28 ` Arnd Bergmann
2010-08-19 15:38 ` Richard Cochran
2010-08-23 20:21 ` john stultz
2010-08-27 11:08 ` Richard Cochran
2010-08-27 12:03 ` Arnd Bergmann
2010-08-27 20:56 ` John Stultz
2010-08-27 12:45 ` Alan Cox
2010-08-27 20:14 ` John Stultz
2010-08-23 20:08 ` john stultz
2010-08-24 18:30 ` Stephan Gatzka [this message]
2010-08-25 9:40 ` Christian Riesch
2010-08-27 1:57 ` john stultz
2010-08-27 7:57 ` Richard Cochran
2010-08-27 12:41 ` Alan Cox
2010-08-27 14:02 ` Richard Cochran
2010-08-27 14:50 ` Alan Cox
2010-08-27 15:35 ` M. Warner Losh
2010-08-29 13:32 ` Christian Riesch
2010-08-27 12:38 ` Richard Cochran
2010-08-27 13:38 ` Alan Cox
2010-08-27 14:34 ` Richard Cochran
2010-08-27 15:06 ` Alan Cox
2010-08-27 15:21 ` Patrick Loschmidt
2010-08-27 16:17 ` Jacob Keller
2010-08-27 22:30 ` John Stultz
2010-09-06 6:33 ` Richard Cochran
2010-09-21 16:54 ` Stephan Gatzka
2010-09-21 20:47 ` Kyle Moffett
2010-09-22 10:14 ` Richard Cochran
2010-08-16 11:18 ` [PATCH 2/5] ptp: Added a clock that uses the Linux system time Richard Cochran
2010-08-16 11:18 ` [PATCH 3/5] ptp: Added a clock that uses the eTSEC found on the MPC85xx Richard Cochran
2010-08-16 11:18 ` [PATCH 4/5] ptp: Added a clock driver for the IXP46x Richard Cochran
2010-08-16 11:19 ` [PATCH 5/5] ptp: Added a clock driver for the National Semiconductor PHYTER Richard Cochran
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