Eric Lee / smarc-fsl-linux-kernel

24 May, 2019

1 commit

  • 74ba9207e   treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 ... Browse Code »

    Based on 1 normalized pattern(s):

    this program is free software you can redistribute it and or modify
    it under the terms of the gnu general public license as published by
    the free software foundation either version 2 of the license or at
    your option any later version this program is distributed in the
    hope that it will be useful but without any warranty without even
    the implied warranty of merchantability or fitness for a particular
    purpose see the gnu general public license for more details you
    should have received a copy of the gnu general public license along
    with this program if not write to the free software foundation inc
    675 mass ave cambridge ma 02139 usa

    extracted by the scancode license scanner the SPDX license identifier

    GPL-2.0-or-later

    has been chosen to replace the boilerplate/reference in 441 file(s).

    Signed-off-by: Thomas Gleixner
    Reviewed-by: Michael Ellerman (powerpc)
    Reviewed-by: Richard Fontana
    Reviewed-by: Allison Randal
    Reviewed-by: Kate Stewart
    Cc: linux-spdx@vger.kernel.org
    Link: https://lkml.kernel.org/r/20190520071858.739733335@linutronix.de
    Signed-off-by: Greg Kroah-Hartman

    Thomas Gleixner
     

21 May, 2019

1 commit

15 Mar, 2018

1 commit

07 Feb, 2018

1 commit

  • 28f3a488e   pps: parport: use timespec64 instead of timespec ... Browse Code »

    getnstimeofday() is deprecated, so I'm converting this to use
    ktime_get_real_ts64() as a safe replacement. I considered using
    ktime_get_real() instead, but since the algorithm here depends on the
    exact timing, I decided to introduce fewer changes and leave the code
    that determines the nanoseconds since the last seconds wrap untouched.

    It's not entirely clear to me whether we should also change the time
    base to CLOCK_BOOTTIME or CLOCK_TAI. With boottime, we would be
    independent of changes due to settimeofday() and only see the speed
    adjustment from the upstream clock source, with the downside of having
    the signal be at an arbirary offset from the start of the UTC second
    signal. With CLOCK_TAI, we would use the same offset from the UTC
    second as before and still suffer from settimeofday() adjustments, but
    would be less confused during leap seconds.

    Both boottime and tai only offer usable (i.e. avoiding ktime_t to
    timespec64 conversion) interfaces for ktime_t though, so either way,
    changing it wouldn't take significantly more work. CLOCK_MONOTONIC
    could be used with ktime_get_ts64(), but would lose synchronization
    across a suspend/resume cycle, which seems worse.

    Link: http://lkml.kernel.org/r/20180116171451.3095620-1-arnd@arndb.de
    Signed-off-by: Arnd Bergmann
    Acked-by: Rodolfo Giometti
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Arnd Bergmann
     

09 Sep, 2017

1 commit

18 May, 2017

1 commit

23 Mar, 2011

1 commit

  • 77d1c8eb8   pps: remove unreachable code ... Browse Code »

    Remove code enabled only when CONFIG_PREEMPT_RT is turned on because it is
    not used in the vanilla kernel.

    Signed-off-by: Alexander Gordeev
    Cc: john stultz
    Cc: Rodolfo Giometti
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Alexander Gordeev
     

05 Mar, 2011

1 commit

  • 95b90afec   pps: make pps_gen_parport depend on BROKEN ... Browse Code »

    This driver causes hard lockups, when the active clock soure is jiffies.

    The reason is that it loops with interrupts disabled waiting for a
    timestamp to be reached by polling getnstimeofday(). Though with a
    jiffies clocksource, when that code runs on the same CPU which is
    responsible for updating jiffies, then we loop in circles for ever
    simply because the timer interrupt cannot update jiffies. So both UP
    and SMP can be affected.

    There is no easy fix for that problem so make it depend on BROKEN for
    now.

    Signed-off-by: Thomas Gleixner
    Cc: Alexander Gordeev
    Cc: Rodolfo Giometti
    Cc: john stultz
    Cc: Ingo Molnar
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Thomas Gleixner
     

26 Jan, 2011

1 commit

  • 4f542e3dd   pps: claim parallel port exclusively ... Browse Code »

    Both pps_parport and pps_gen_parport are written in a way that they
    can't share a port with any other driver. This can result in locking up
    the process that loads modules or even the whole kernel if the modules
    are compiled in. Use PARPORT_FLAG_EXCL to indicate this.

    Signed-off-by: Alexander Gordeev
    Cc: Alexander Gordeev
    Cc: Ingo Molnar
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Alexander Gordeev
     

14 Jan, 2011

2 commits

  • 563558b2c   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.

    Signed-off-by: Alexander Gordeev
    Cc: Rodolfo Giometti
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Alexander Gordeev
     
  • 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