Eric Lee / smarc-fsl-linux-kernel

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