Eric Lee / smarc-fsl-linux-kernel

09 Sep, 2017

1 commit

  • a2d818030   drivers/pps: aesthetic tweaks to PPS-related content ... Browse Code »

    Collection of aesthetic adjustments to various PPS-related files,
    directories and Documentation, some quite minor just for the sake of
    consistency, including:

    * Updated example of pps device tree node (courtesy Rodolfo G.)
    * "PPS-API" -> "PPS API"
    * "pps_source_info_s" -> "pps_source_info"
    * "ktimer driver" -> "pps-ktimer driver"
    * "ppstest /dev/pps0" -> "ppstest /dev/pps1" to match example
    * Add missing PPS-related entries to MAINTAINERS file
    * Other trivialities

    Link: http://lkml.kernel.org/r/alpine.LFD.2.20.1708261048220.8106@localhost.localdomain
    Signed-off-by: Robert P. J. Day
    Acked-by: Rodolfo Giometti
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Robert P. J. Day
     

05 Jan, 2017

3 commits

28 Apr, 2016

1 commit

15 Jul, 2015

1 commit

22 Jun, 2015

1 commit

  • ce9ae951d   Doc:pps: Fix typo in pps.txt ... Browse Code »

    This patch fix a spelling typo in Documentation/pps/pps.txt

    Signed-off-by: Masanari Iida
    Acked-by: Rodolfo Giometti
    [jc: did s/into/in the/ on the same line while we were there]
    Signed-off-by: Jonathan Corbet

    Masanari Iida
     

27 Sep, 2013

1 commit

  • 833efc0ed   USB: serial: invoke dcd_change ldisc's handler. ... Browse Code »

    The DCD pin of the serial port can receive a PPS signal. By calling
    the port line discipline dcd handle, this patch allow to monitor PPS
    through USB serial devices.

    However the performance aren't as good as the uart drivers, so
    document this point too.

    Signed-off-by: Paul Chavent
    Acked-by: Rodolfo Giometti
    Signed-off-by: Greg Kroah-Hartman

    Paul Chavent
     

14 Jan, 2011

1 commit

  • 46b402a0e   pps: add parallel port PPS signal generator ... Browse Code »

    Add PPS signal generator which utilizes STROBE pin of a parallel port to
    send PPS signals. It uses parport abstraction layer and hrtimers to
    precisely control the signal.

    [akpm@linux-foundation.org: fix build]
    Signed-off-by: Alexander Gordeev
    Acked-by: Rodolfo Giometti
    Cc: john stultz
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Alexander Gordeev
     

19 Jun, 2009

1 commit

  • eae9d2ba0   LinuxPPS: core support ... Browse Code »

    This patch adds the kernel side of the PPS support currently named
    "LinuxPPS".

    PPS means "pulse per second" and a PPS source is just a device which
    provides a high precision signal each second so that an application can
    use it to adjust system clock time.

    Common use is the combination of the NTPD as userland program with a GPS
    receiver as PPS source to obtain a wallclock-time with sub-millisecond
    synchronisation to UTC.

    To obtain this goal the userland programs shoud use the PPS API
    specification (RFC 2783 - Pulse-Per-Second API for UNIX-like Operating
    Systems, Version 1.0) which in part is implemented by this patch. It
    provides a set of chars devices, one per PPS source, which can be used to
    get the time signal. The RFC's functions can be implemented by accessing
    to these char devices.

    Signed-off-by: Rodolfo Giometti
    Cc: David Woodhouse
    Cc: Greg KH
    Cc: Randy Dunlap
    Cc: Kay Sievers
    Acked-by: Alan Cox
    Cc: Michael Kerrisk
    Cc: Christoph Hellwig
    Cc: Roman Zippel
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Rodolfo Giometti