diff options
| author | Philip Chen <philipchen@google.com> | 2018-04-13 15:53:09 -0700 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2018-05-14 23:56:57 -0700 |
| commit | 492b1aceeb307949ed42da65aa0ce60b4cb18325 (patch) | |
| tree | 3acbef43834a5923ccb0b9d342b7887b4f7d33b1 /driver | |
| parent | fa6c5abae5d9e962127ec15e79e45ffab9fad658 (diff) | |
| download | chrome-ec-492b1aceeb307949ed42da65aa0ce60b4cb18325.tar.gz | |
charger/rt946x: Add an interface to check charge termination
After we set TE (CL:958295), rt946x terminates charging when
the charge current is below IEOC in constant-voltage mode.
Let's add an interface to check charge termination status.
BUG=b:77870927
BRANCH=scarlet
TEST=charge scarlet, confirm rt946x_is_charge_done() returns 0 when
battery is charging and returns 1 when charge terminates (battery is
full). Then keep AC plugged and wait, confirm rt946x_is_charge_done()
returns 0 when rt946x restarts charging.
Change-Id: I559d328aa0d7c5c4cd5bf7178370ea039aa80204
Signed-off-by: Philip Chen <philipchen@google.com>
Reviewed-on: https://chromium-review.googlesource.com/1044768
Commit-Ready: Philip Chen <philipchen@chromium.org>
Tested-by: Philip Chen <philipchen@chromium.org>
Reviewed-by: Nicolas Boichat <drinkcat@chromium.org>
Diffstat (limited to 'driver')
| -rw-r--r-- | driver/charger/rt946x.c | 19 | ||||
| -rw-r--r-- | driver/charger/rt946x.h | 3 |
2 files changed, 22 insertions, 0 deletions
diff --git a/driver/charger/rt946x.c b/driver/charger/rt946x.c index 2d0f15f90c..27b92abf43 100644 --- a/driver/charger/rt946x.c +++ b/driver/charger/rt946x.c @@ -63,6 +63,13 @@ enum rt946x_ilmtsel { RT946X_ILMTSEL_LOWER_LEVEL, /* lower of above two */ }; +enum rt946x_chg_stat { + RT946X_CHGSTAT_READY = 0, + RT946X_CHGSTAT_IN_PROGRESS, + RT946X_CHGSTAT_DONE, + RT946X_CHGSTAT_FAULT, +}; + enum rt946x_adc_in_sel { RT946X_ADC_VBUS_DIV5 = 1, RT946X_ADC_VBUS_DIV2, @@ -911,6 +918,18 @@ int rt946x_is_vbus_ready(void) 0 : !!(val & RT946X_MASK_PWR_RDY); } +int rt946x_is_charge_done(void) +{ + int val = 0; + + if (rt946x_read8(RT946X_REG_CHGSTAT, &val)) + return 0; + + val = (val & RT946X_MASK_CHG_STAT) >> RT946X_SHIFT_CHG_STAT; + + return val == RT946X_CHGSTAT_DONE; +} + int rt946x_cutoff_battery(void) { return rt946x_set_bit(RT946X_REG_CHGCTRL2, RT946X_MASK_SHIP_MODE); diff --git a/driver/charger/rt946x.h b/driver/charger/rt946x.h index aff1c99928..208a8e80fe 100644 --- a/driver/charger/rt946x.h +++ b/driver/charger/rt946x.h @@ -315,6 +315,9 @@ int rt946x_enable_charger_boost(int en); */ int rt946x_is_vbus_ready(void); +/* Return 1 if rt946x triggers charge termination due to full charge. */ +int rt946x_is_charge_done(void); + /* * Cut off the battery (force BATFET to turn off). * Return 0 if it succeeds. |