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| author | Rong Chang <rongchang@chromium.org> | 2015-10-28 18:02:23 +0800 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2015-11-05 11:10:25 -0800 |
| commit | f9ffa951c1eda17f6aa5cea66b1842b0bbf5d75f (patch) | |
| tree | 1d0b7ca884ad61294ddadff92d50b0ddd79486e6 /common/charge_state_v2.c | |
| parent | 41235ac25a859880d87ea2747b95ab44d8b0057a (diff) | |
| download | chrome-ec-f9ffa951c1eda17f6aa5cea66b1842b0bbf5d75f.tar.gz | |
chg: add narrow VDC power path support
Under NVDC, BGATE natively has a body diode. Hence there's a discharging
path if VSYS is lower than VBAT. This change keeps VSYS voltage when
turning off charging.
BRANCH=none
BUG=chrome-os-partner:46698
TEST=manual
make buildall -j
load on boards with isl9237 charger.
charge the battery to full, and check charging voltage and current.
Change-Id: I8a6046444dd40a3b57f034be124b9e8fe281de40
Signed-off-by: Rong Chang <rongchang@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/309289
Reviewed-by: Alec Berg <alecaberg@chromium.org>
Diffstat (limited to 'common/charge_state_v2.c')
| -rw-r--r-- | common/charge_state_v2.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/common/charge_state_v2.c b/common/charge_state_v2.c index b4ffd06aa5..b6ad4b933f 100644 --- a/common/charge_state_v2.c +++ b/common/charge_state_v2.c @@ -373,7 +373,16 @@ static int charge_request(int voltage, int current) static int prev_volt, prev_curr; if (!voltage || !current) +#ifdef CONFIG_CHARGER_NARROW_VDC + current = 0; + /* With NVDC charger, keep VSYS voltage higher than battery */ + voltage = charger_closest_voltage( + curr.batt.voltage + charger_get_info()->voltage_step); + /* And handle dead battery case */ + voltage = MAX(voltage, battery_get_info()->voltage_min); +#else voltage = current = 0; +#endif if (curr.ac) { if (prev_volt != voltage || prev_curr != current) |