netdev - [PATCH 0/3] [RFC] [v2] ptp: IEEE 1588 clock support

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Date:	Thu, 29 Apr 2010 11:19:03 +0200
From:	Richard Cochran <richardcochran@...il.com>
To:	netdev@...r.kernel.org
Subject: [PATCH 0/3] [RFC] [v2] ptp: IEEE 1588 clock support

* 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

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