diff options
| author | Vijay Hiremath <vijay.p.hiremath@intel.com> | 2016-11-21 19:38:09 -0800 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2016-11-28 01:01:16 -0800 |
| commit | 31e1ee195561f0c21ca390f5da9cb4816d668f70 (patch) | |
| tree | 7b8a639d693d7d8f98f89dca20b7c211f209313b /driver/charger/bd9995x.c | |
| parent | ba50aab90456504b0dc8d5f27baffd0f553dc251 (diff) | |
| download | chrome-ec-31e1ee195561f0c21ca390f5da9cb4816d668f70.tar.gz | |
reef: BD9995X: Suspend DC-DC converter when discharging on AC
When the battery is fully charged or not charging, upon removal of
the AC, discharge takes long time. To overcome this issue suspend
the DC-DC converter when discharging on AC.
BUG=chrome-os-partner:58969
BRANCH=none
TEST=Manually tested on reef. Discharge is in the permissible range.
'chgstate' console command prints correct values.
Change-Id: I64afa992e50b6e18daf43edf237fde8cf658a8a2
Signed-off-by: Vijay Hiremath <vijay.p.hiremath@intel.com>
Reviewed-on: https://chromium-review.googlesource.com/413153
Commit-Ready: Vijay P Hiremath <vijay.p.hiremath@intel.com>
Tested-by: Vijay P Hiremath <vijay.p.hiremath@intel.com>
Reviewed-by: Shawn N <shawnn@chromium.org>
Diffstat (limited to 'driver/charger/bd9995x.c')
| -rw-r--r-- | driver/charger/bd9995x.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/driver/charger/bd9995x.c b/driver/charger/bd9995x.c index 1acd753da3..d87f9340ba 100644 --- a/driver/charger/bd9995x.c +++ b/driver/charger/bd9995x.c @@ -795,10 +795,18 @@ int charger_discharge_on_ac(int enable) if (rv) return rv; + /* + * Suspend USB charging and DC/DC converter so that BATT_LEARN mode + * doesn't auto exit if VBAT < VSYSVAL_THL_SET and also it helps to + * discharge VBUS quickly when charging is not allowed and the AC + * is removed. + */ if (enable) - reg |= BD9995X_CMD_CHGOP_SET2_BATT_LEARN; + reg |= BD9995X_CMD_CHGOP_SET2_BATT_LEARN | + BD9995X_CMD_CHGOP_SET2_USB_SUS; else - reg &= ~BD9995X_CMD_CHGOP_SET2_BATT_LEARN; + reg &= ~(BD9995X_CMD_CHGOP_SET2_BATT_LEARN | + BD9995X_CMD_CHGOP_SET2_USB_SUS); return ch_raw_write16(BD9995X_CMD_CHGOP_SET2, reg, BD9995X_EXTENDED_COMMAND); |