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    SubjectLinuxPPS (RESUBMIT 7): the PPS Linux implementation.
    This patch set adds the PPS support into Linux.

    PPS means "pulse per second" and its API is specified by RFC 2783
    (Pulse-Per-Second API for UNIX-like Operating Systems, Version 1.0).

    The code has been tested with the NTPD program
    (http://www.eecis.udel.edu/~mills/ntp/html/index.html) and several GPS
    antennae.

    Changelog

    RESUBMIT 6 -> 7:

    * A new line discipline has been added in order to leave untouched
    the serial ports code (as suggested by Alan).

    * n_tty.c exports only GPL symbols.

    * ioctl numbers fixed in order to avoid any conflicts.

    * Last patch (0010-PPS-low-level-IRQ-timestamps-recording.patch) implements
    low level IRQs timestamps recording which mproves PPS precision but can
    be dropped for kernel inclusion! As suggested by Alan: "After that is
    sorted/merged we can come back to working out the best way to improve
    the IRQ and HARDPPS hacks."

    Rodolfo

    --

    b/Documentation/ABI/testing/sysfs-pps | 73 +++++++
    b/Documentation/ioctl-number.txt | 2
    b/Documentation/pps/Makefile | 28 ++
    b/Documentation/pps/pps.txt | 172 +++++++++++++++++
    b/Documentation/pps/ppsfind | 17 +
    b/Documentation/pps/ppsldisc.c | 46 ++++
    b/Documentation/pps/ppstest.c | 151 +++++++++++++++
    b/Documentation/pps/timepps.h | 195 +++++++++++++++++++
    b/Documentation/tty.txt | 4
    b/MAINTAINERS | 7
    b/arch/x86/kernel/irq_32.c | 17 +
    b/arch/x86/kernel/irq_64.c | 21 +-
    b/drivers/Kconfig | 2
    b/drivers/Makefile | 1
    b/drivers/char/lp.c | 61 ++++++
    b/drivers/char/n_tty.c | 54 +++--
    b/drivers/pps/Kconfig | 33 +++
    b/drivers/pps/Makefile | 8
    b/drivers/pps/clients/Kconfig | 18 +
    b/drivers/pps/clients/Makefile | 9
    b/drivers/pps/clients/ktimer.c | 124 ++++++++++++
    b/drivers/pps/clients/pps-ldisc.c | 154 +++++++++++++++
    b/drivers/pps/kapi.c | 322 ++++++++++++++++++++++++++++++++
    b/drivers/pps/pps.c | 335 ++++++++++++++++++++++++++++++++++
    b/drivers/pps/sysfs.c | 104 ++++++++++
    b/drivers/serial/8250.c | 13 +
    b/include/linux/Kbuild | 1
    b/include/linux/parport.h | 22 ++
    b/include/linux/pps.h | 202 ++++++++++++++++++++
    b/include/linux/serial_core.h | 10 -
    b/include/linux/tty.h | 16 +
    b/include/linux/tty_ldisc.h | 8
    drivers/pps/Kconfig | 14 +
    drivers/pps/Makefile | 1
    drivers/pps/clients/Kconfig | 17 +
    drivers/pps/clients/Makefile | 1
    include/linux/pps.h | 1
    include/linux/serial_core.h | 7
    include/linux/tty.h | 3
    39 files changed, 2247 insertions(+), 27 deletions(-)




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