diff options
| author | Shawn Nematbakhsh <shawnn@chromium.org> | 2016-10-10 15:28:15 -0700 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2016-11-30 19:11:30 -0800 |
| commit | b1014fc6bf6a5e103c494d648ee615e7d0cc3136 (patch) | |
| tree | 0f22e4623d265fa11a590335f470c04d133655ca /include | |
| parent | a285debf1f1d91ea767d6a79b7109c8c42f6f3f8 (diff) | |
| download | chrome-ec-b1014fc6bf6a5e103c494d648ee615e7d0cc3136.tar.gz | |
charger: Add CONFIG option to maintain VBAT voltage
On the bd9995*, back boosting may occur when actual battery voltage
drops below VBAT register setting. Maintain the VBAT register at the
battery-requested charge voltage even when not charging to ensure the
bd9995* doesn't become a back boosted animal.
BUG=chrome-os-partner:56139,chrome-os-partner:54248
BRANCH=gru
TEST=Manual on kevin, unplug AC, run 'charger', verify that 'V_batt' is
maintained at 8688 mV. Attach charger, verify 'V_batt' stays at 8688 mV
and device charges.
Change-Id: Ia0cc7f9279cb460e20a8faf332ad432067dc5482
Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/400087
Commit-Ready: Daisuke Nojiri <dnojiri@chromium.org>
Tested-by: Shawn N <shawnn@chromium.org>
Reviewed-by: Vijay P Hiremath <vijay.p.hiremath@intel.com>
Reviewed-by: Daisuke Nojiri <dnojiri@chromium.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/config.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/config.h b/include/config.h index b1655d1017..76a5e9805d 100644 --- a/include/config.h +++ b/include/config.h @@ -479,6 +479,13 @@ */ #undef CONFIG_CHARGER_MAX_INPUT_CURRENT +/* + * Leave charger VBAT configured to battery-requested voltage under all + * conditions, even when AC is not present. This may be necessary to work + * around quirks of certain charger chips, such as the BD9995X. + */ +#undef CONFIG_CHARGER_MAINTAIN_VBAT + /* Minimum battery percentage for power on */ #undef CONFIG_CHARGER_MIN_BAT_PCT_FOR_POWER_ON |