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| author | Wealian Liao <whliao@nuvoton.corp-partner.google.com> | 2020-10-29 01:55:56 -0700 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2021-01-12 02:35:14 +0000 |
| commit | 88b780027ddfc0afa55c4cf3c6d5606d7676cbca (patch) | |
| tree | 32aac28aa0a1c737aecea4162b43a7599a035bef /common/main.c | |
| parent | 72106b0e0997ac8d0df70335471659372466133b (diff) | |
| download | chrome-ec-88b780027ddfc0afa55c4cf3c6d5606d7676cbca.tar.gz | |
npcx/system: LCT compensate for MTC in PSL_hibernate
NPCX chip uses the MTC module as the RTC counter. However, in PSL
hibernate, MTC will stop counting. NPCX9 supports the LCT module which
could count continuously when VCC1 power is off. The CL uses LCT to
compensate for the MTC counter value after PSL hibernate wake-up. The
LCT maximum counting value is 16 weeks.
BRANCH=none
BUG=b:165777478, b:171919875
TEST=pass "make buildall"
TEST=Check the RTC value in the following scenario:
1. "hibernate" and wake up EC by PSL input.
2. "hibernate 30" and wake up EC after timeout.
3. "hibernate 30" and wake up EC by PSL input before timeout.
Signed-off-by: Wealian Liao <whliao@nuvoton.corp-partner.google.com>
Change-Id: I39e370a437f40749acbd3a35a8b37ebec70f1bf2
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2506864
Reviewed-by: Keith Short <keithshort@chromium.org>
Diffstat (limited to 'common/main.c')
| -rw-r--r-- | common/main.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/common/main.c b/common/main.c index c1228d0a7a..2e9fe5a444 100644 --- a/common/main.c +++ b/common/main.c @@ -124,6 +124,10 @@ test_mockable __keep int main(void) */ timer_init(); + /* Compensate the elapsed time for the RTC. */ + if (IS_ENABLED(CONFIG_HIBERNATE_PSL_COMPENSATE_RTC)) + system_compensate_rtc(); + /* Main initialization stage. Modules may enable interrupts here. */ cpu_init(); |