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| author | Scott Collyer <scollyer@google.com> | 2019-05-14 17:22:01 -0700 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2019-05-21 14:20:40 -0700 |
| commit | a8f20b538784156db4c57793798894bdd0f472c8 (patch) | |
| tree | 834f6fc509ec8fd1d7bd08d99c5688bd75f2a9b5 /include | |
| parent | 1df7f1fb8b60d3a9314f354eae23db1674704a94 (diff) | |
| download | chrome-ec-a8f20b538784156db4c57793798894bdd0f472c8.tar.gz | |
bq25710: Allow IDCHG to be used as a prochot trigger
Kohaku units are currently using a 2S+1P battery back which is not
able to provide sufficient power for peak CPU load when running on
battery only. The bq25710 has various triggers for prochot and one of
those is IDCHG (battery discharge current). This CL adds a new config
option CONFIG_CHARGER_BQ25710_IDCHG_LIMIT_MA to enable this feature in
the bq25710. For prochot to be active, the bq25710 must remain in
performance mode. Chispet hooks are used to request the bq25710 in/out
of performace mode when the IDCHG prochot feature is active.
BUG=b:132285560
BRANCH=none
TEST=Manual
Connected wires to VBAT, PPVAR_SYS, PROCHOT_ODL signals and had a
current probe connected to measure IBAT. Verfied that without this CL,
VBAT shuts off when IBAT spikes. With this CL, then verified that
prochot gets asserted whenever the current spikes to values specified
by CONFIG_CHARGER_BQ25710_IDCHG_LIMIT_MA. In addition verified that
with this CL, the system can successfully boot and remain powered on
even as CPU load gets increased.
Change-Id: If13d16f561b76289936d0d75a2b984d2b71b3c37
Signed-off-by: Scott Collyer <scollyer@google.com>
Reviewed-on: https://chromium-review.googlesource.com/1613797
Commit-Ready: Scott Collyer <scollyer@chromium.org>
Tested-by: Scott Collyer <scollyer@chromium.org>
Legacy-Commit-Queue: Commit Bot <commit-bot@chromium.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/config.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/config.h b/include/config.h index 5975df08a4..ca441d17cf 100644 --- a/include/config.h +++ b/include/config.h @@ -817,6 +817,16 @@ */ #undef CONFIG_CHARGER_INPUT_CURRENT +/* + * This config option is used to enable IDCHG trigger for prochot. This macro + * should be set to the desired current limit to draw from the battery before + * triggering prochot. Note that is has a 512 mA granularity. The function that + * sets the limit will mask of the lower 10 bits. For this check to be active + * the bq25710 must be in performance mode and this config option is also used + * to keep the bq25710 in performance mode when the AP is in S0. + */ +#undef CONFIG_CHARGER_BQ25710_IDCHG_LIMIT_MA + /* Define to use Power Delivery State Machine Framework */ #undef CONFIG_USB_SM_FRAMEWORK |