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author | Jesper Nilsson <jesper.nilsson@axis.com> | 2010-07-30 15:33:07 (GMT) |
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committer | Jesper Nilsson <jesper.nilsson@axis.com> | 2010-08-04 10:58:55 (GMT) |
commit | 60dbd6633178a8625ed71329da0167c6d50c559c (patch) | |
tree | bcbc1004dfe356ce7cf30f183725dbbc9dad3e4f /net/packet | |
parent | 26bfeea38a4a5daf52c8f01c986ca8680bf1f6a1 (diff) | |
download | linux-fsl-qoriq-60dbd6633178a8625ed71329da0167c6d50c559c.tar.xz |
CRIS: GENERIC_TIME fixes
GENERIC_TIME was not functional for CRIS, giving random backward
time jumps.
For CRISv32 implement a new clocksource using the free running counter
and ditch the arch_gettimeoffset.
The random time jumps still existed, but turned out to be the write_seqlock
which was missing around our do_timer() call.
So switch over to GENERIC_TIME using the clocksource for CRISv32.
CRISv10 doesn't have the free running counter needed for the
clocksource trick, but we can still use GENERIC_TIME with
arch_gettimeoffset.
Unfortunately, there were problems in using the prescaler register
to timer0 for the gettimeoffset calculation, so it is now ignored,
making our resolution worse by the tune of 40usec (0.4%) worst case.
At the same time, clean up some formatting and use NSEC_PER_SEC
instead of 1000000000.
Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
Diffstat (limited to 'net/packet')
0 files changed, 0 insertions, 0 deletions