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| author | Alec Berg <alecaberg@chromium.org> | 2014-06-21 03:58:41 -0700 |
|---|---|---|
| committer | chrome-internal-fetch <chrome-internal-fetch@google.com> | 2014-06-27 22:54:20 +0000 |
| commit | f8171d72f30392807af3b69450b7153ef0b1082f (patch) | |
| tree | 6eaeb90e1d4b0a230127284dc6888f8816e7a580 | |
| parent | 9924b19d6fa21d4c7b807017b30c3ee07a204733 (diff) | |
| download | chrome-ec-f8171d72f30392807af3b69450b7153ef0b1082f.tar.gz | |
samus: temporary fix to allow dead battery charging w/o AC PRESENT signal
This is a temporary workaround to allow dead battery charging without
an AC PRESENT signal by delaying going into hibernate with an extremely
low value in order to check if AC is present by waiting for PD MCU.
BUG=chrome-os-partner:29842
BRANCH=none
TEST=Test with a dead battery that when you plug in AC and reboot, it
is able to charge. Previous to this change with a dead battery and AC
plugged in the EC would boot and almost immediately go back into hibernate
Change-Id: I338a0cc9ee37dab3e6caf29369ac6e819772ca91
Signed-off-by: Alec Berg <alecaberg@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/205147
Reviewed-by: Bill Richardson <wfrichar@chromium.org>
| -rw-r--r-- | common/charge_state_v2.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/common/charge_state_v2.c b/common/charge_state_v2.c index 94d53a90cb..ba88aabc2d 100644 --- a/common/charge_state_v2.c +++ b/common/charge_state_v2.c @@ -387,6 +387,23 @@ static inline int battery_too_low(void) curr.batt.voltage <= batt_info->voltage_min)); } +#ifdef BOARD_SAMUS +/* + * TODO(crosbug.com/p/29842): remove this workaround once the AC_PRESENT + * input is avaible. + */ +static void check_deep_discharge_again(void) +{ + /* Check again if power is present */ + if (!extpower_is_present()) { + /* AP is off, so shut down the EC now */ + CPRINTS("charge force EC hibernate due to low battery"); + system_hibernate(0, 0); + } +} +DECLARE_DEFERRED(check_deep_discharge_again); +#endif + /* Shut everything down before the battery completely dies. */ static void prevent_deep_discharge(void) { @@ -394,9 +411,17 @@ static void prevent_deep_discharge(void) return; if (chipset_in_state(CHIPSET_STATE_ANY_OFF)) { +#ifdef BOARD_SAMUS + /* + * TODO(crosbug.com/p/29842): remove this workaround once + * the AC_PRESENT input is avaible. + */ + hook_call_deferred(check_deep_discharge_again, 10*SECOND); +#else /* AP is off, so shut down the EC now */ CPRINTS("charge force EC hibernate due to low battery"); system_hibernate(0, 0); +#endif } else if (!shutdown_warning_time.val) { /* Warn AP battery level is so low we'll shut down */ CPRINTS("charge warn shutdown due to low battery"); |