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| author | Vincent Palatin <vpalatin@chromium.org> | 2012-08-05 20:47:54 -0700 |
|---|---|---|
| committer | Gerrit <chrome-bot@google.com> | 2012-08-06 18:55:00 -0700 |
| commit | dbc861c5f0115ec673be2a7c6837d19dc9e3c4c1 (patch) | |
| tree | 5f1082ee2e4c0a6bc7e75c70ea42a92c1cd5dcd7 /core | |
| parent | d8e04f0db75a0088121981df3bd57c3dccb10945 (diff) | |
| download | chrome-ec-dbc861c5f0115ec673be2a7c6837d19dc9e3c4c1.tar.gz | |
add a function to fast forward system timer
When we wake up from a deep sleep mode, the system timer clock might
have been stopped. We need to be able to set using another time source
(e.g. the RTC).
Signed-off-by: Vincent Palatin <vpalatin@chromium.org>
BUG=chrome-os-partner:8866
TEST=make BOARD=snow && make BOARD=link
on Snow, on a software implementing STOP mode, check the system time is
still accurate by comparing it to the wall clock.
Change-Id: Ieddbb423d052c7aceb398470866b25b25a74c0a0
Reviewed-on: https://gerrit.chromium.org/gerrit/29314
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Commit-Ready: Vincent Palatin <vpalatin@chromium.org>
Tested-by: Vincent Palatin <vpalatin@chromium.org>
Diffstat (limited to 'core')
| -rw-r--r-- | core/cortex-m/timer.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/core/cortex-m/timer.c b/core/cortex-m/timer.c index 994f9c1245..10370aeeb6 100644 --- a/core/cortex-m/timer.c +++ b/core/cortex-m/timer.c @@ -169,6 +169,14 @@ timestamp_t get_time(void) } +void force_time(timestamp_t ts) +{ + clksrc_high = ts.le.hi; + __hw_clock_source_set(ts.le.lo); + /* some timers might be already expired : process them */ + task_trigger_irq(timer_irq); +} + void timer_print_info(void) { uint64_t t = get_time().val; |