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Message-Id: <727B3C5E-39AA-4038-AB3F-EAC862654860@kernel.crashing.org> Date: Sat, 1 May 2010 11:32:47 -0500 From: Kumar Gala <galak@...nel.crashing.org> To: Richard Cochran <richardcochran@...il.com> Cc: Netdev <netdev@...r.kernel.org> Subject: Re: [PATCH 0/3] [RFC] [v2] ptp: IEEE 1588 clock support On Apr 29, 2010, at 4:19 AM, Richard Cochran wrote: > * Patch ChangeLog > ** v2 > - Changed clock list from a static array into a dynamic list. Also, > use a bitmap to manage the clock's minor numbers. > - Replaced character device semaphore with a mutex. > - Drop .ko from module names in Kbuild help. > - Replace deprecated unifdef-y with header-y for user space header file. > - Gianfar driver now gets parameters from device tree. > - Added API documentation to Documentation/ptp/ptp.txt, with links > to both of the ptpd patches on sourceforge. > > * Preface > > Now and again there has been some talk on this list of adding PTP > support into Linux. One part of the picture is already in place, the > SO_TIMESTAMPING API for hardware time stamping. It has been pointed > out that this API is not perfect, however, it is good enough for many > real world uses of IEEE 1588. The second needed part has not, AFAICT, > ever been addressed. > > Here I offer an early draft of an idea how to bring the missing > functionality into Linux. I don't yet have all of the features > implemented, as described below. Still I would like to get your > feedback concerning this idea before getting too far into it. I do > have all of the hardware mentioned at hand, so I have a good idea that > the proposed API covers the features of those clocks. > > Thanks in advance for your comments, > > Richard > > > Richard Cochran (3): > ptp: Added a brand new class driver for ptp clocks. > ptp: Added a clock that uses the Linux system time. > ptp: Added a clock that uses the eTSEC found on the MPC85xx. > > Documentation/ptp/ptp.txt | 78 +++++++++ > Documentation/ptp/testptp.c | 130 ++++++++++++++ > Documentation/ptp/testptp.mk | 33 ++++ > arch/powerpc/boot/dts/mpc8313erdb.dts | 14 ++ > arch/powerpc/boot/dts/p2020ds.dts | 13 ++ > arch/powerpc/boot/dts/p2020rdb.dts | 14 ++ > drivers/Kconfig | 2 + > drivers/Makefile | 1 + > drivers/net/Makefile | 1 + > drivers/net/gianfar_ptp.c | 308 +++++++++++++++++++++++++++++++++ > drivers/net/gianfar_ptp_reg.h | 107 ++++++++++++ > drivers/ptp/Kconfig | 51 ++++++ > drivers/ptp/Makefile | 6 + > drivers/ptp/ptp_clock.c | 302 ++++++++++++++++++++++++++++++++ > drivers/ptp/ptp_linux.c | 122 +++++++++++++ > include/linux/Kbuild | 1 + > include/linux/ptp_clock.h | 37 ++++ > include/linux/ptp_clock_kernel.h | 134 ++++++++++++++ > kernel/time/ntp.c | 2 + > 19 files changed, 1356 insertions(+), 0 deletions(-) > create mode 100644 Documentation/ptp/ptp.txt > create mode 100644 Documentation/ptp/testptp.c > create mode 100644 Documentation/ptp/testptp.mk > create mode 100644 drivers/net/gianfar_ptp.c > create mode 100644 drivers/net/gianfar_ptp_reg.h > create mode 100644 drivers/ptp/Kconfig > create mode 100644 drivers/ptp/Makefile > create mode 100644 drivers/ptp/ptp_clock.c > create mode 100644 drivers/ptp/ptp_linux.c > create mode 100644 include/linux/ptp_clock.h > create mode 100644 include/linux/ptp_clock_kernel.h In the future please CC linuxppc-dev@...ts.ozlabs.org and devicetree-discuss@...ts.ozlabs.org since you are adding device tree bindings. - k-- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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