Eric Lee / smarc-fsl-linux-kernel

16 Feb, 2009

1 commit

  • a75244c3d   timecompare: generic infrastructure to map between two time bases ... Browse Code ยป

    Mapping from a struct timecounter to a time returned by functions like
    ktime_get_real() is implemented. This is sufficient to use this code
    in a network device driver which wants to support hardware time
    stamping and transformation of hardware time stamps to system time.

    The interface could have been made more versatile by not depending on
    a time counter, but this wasn't done to avoid writing glue code
    elsewhere.

    The method implemented here is the one used and analyzed under the name
    "assisted PTP" in the LCI PTP paper:
    http://www.linuxclustersinstitute.org/conferences/archive/2008/PDF/Ohly_92221.pdf

    Acked-by: John Stultz
    Signed-off-by: Patrick Ohly
    Signed-off-by: David S. Miller

    Patrick Ohly