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| author | Shawn Nematbakhsh <shawnn@chromium.org> | 2015-01-15 14:49:04 -0800 |
|---|---|---|
| committer | ChromeOS Commit Bot <chromeos-commit-bot@chromium.org> | 2015-01-16 09:45:05 +0000 |
| commit | 93bb7195a8d85ff0b7078b794d24ebab2e6828ff (patch) | |
| tree | 42abf679e692a0bd25c1290937eafe0545df10b9 /common | |
| parent | 94515d9ee25c76c7813addff38599636d916931d (diff) | |
| download | chrome-ec-93bb7195a8d85ff0b7078b794d24ebab2e6828ff.tar.gz | |
charger v2: Don't report 0 battery charge if we're running off battery
Some batteries report 0 charge when their charge level is very low.
powerd has a special interpretation of 0 charge, which causes
low-battery shutdown to not occur. Work-around this powerd behavior by
never reporting 0 charge if our battery is discharging.
BUG=chrome-os-partner:35188
TEST=Manual on Samus. Drain battery to critically low level, verify that
powerd correctly shuts down system.
BRANCH=Samus
Change-Id: I6bd50e038f0e22de7e7de754fa2ea459dc662f35
Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/241101
Reviewed-by: Bill Richardson <wfrichar@chromium.org>
Diffstat (limited to 'common')
| -rw-r--r-- | common/charge_state_v2.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/common/charge_state_v2.c b/common/charge_state_v2.c index 85a0d661c6..13cf6d20ef 100644 --- a/common/charge_state_v2.c +++ b/common/charge_state_v2.c @@ -186,8 +186,17 @@ static void update_dynamic_battery_info(void) if (!(curr.batt.flags & BATT_FLAG_BAD_CURRENT)) *memmap_rate = ABS(curr.batt.current); - if (!(curr.batt.flags & BATT_FLAG_BAD_REMAINING_CAPACITY)) - *memmap_cap = curr.batt.remaining_capacity; + if (!(curr.batt.flags & BATT_FLAG_BAD_REMAINING_CAPACITY)) { + /* + * If we're running off the battery, it must have some charge. + * Don't report zero charge, as that has special meaning + * to Chrome OS powerd. + */ + if (curr.batt.remaining_capacity == 0 && !curr.batt_is_charging) + *memmap_cap = 1; + else + *memmap_cap = curr.batt.remaining_capacity; + } cap_changed = 0; if (!(curr.batt.flags & BATT_FLAG_BAD_FULL_CAPACITY) && |