diff options
| author | Philip Chen <philipchen@google.com> | 2018-02-21 20:38:09 -0800 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2018-02-27 20:17:35 -0800 |
| commit | 0f80ec94747db28e592c3a08b2568bc87cc5f295 (patch) | |
| tree | 739802ae19a69451c8bd27d6986dfd7cfa90c03a | |
| parent | 284c0c35893ff40a2023d52f58670d3b92172a59 (diff) | |
| download | chrome-ec-0f80ec94747db28e592c3a08b2568bc87cc5f295.tar.gz | |
scarlet: Keep VBAT on for the fuel gauge
The fuel gauge (max17055) on Scarlet is powered by VBAT.
To use max17055 to detect batttery presence, we want to keep
it alive even if battery is disconnected.
BUG=b:72697658
BRANCH=scarlet
TEST=boot scarlet rev3 w/o battery on AC and don't see VBAT drops
Change-Id: Ice27384ded257be75ee29a28c0ada9f73b173f6c
Signed-off-by: Philip Chen <philipchen@google.com>
Reviewed-on: https://chromium-review.googlesource.com/930572
Commit-Ready: Philip Chen <philipchen@chromium.org>
Tested-by: Philip Chen <philipchen@chromium.org>
Reviewed-by: Alexandru M Stan <amstan@chromium.org>
Reviewed-by: David Schneider <dnschneid@chromium.org>
| -rw-r--r-- | board/scarlet/board.c | 8 | ||||
| -rw-r--r-- | board/scarlet/board.h | 1 |
2 files changed, 6 insertions, 3 deletions
diff --git a/board/scarlet/board.c b/board/scarlet/board.c index a1d384765a..97b4e9110d 100644 --- a/board/scarlet/board.c +++ b/board/scarlet/board.c @@ -158,10 +158,14 @@ int board_set_active_charge_port(int charge_port) /* Don't charge from a source port */ if (board_vbus_source_enabled(charge_port)) return -1; - rt946x_enable_charger_boost(1); break; case CHARGE_PORT_NONE: - rt946x_enable_charger_boost(0); + /* + * To ensure the fuel gauge (max17055) is always powered + * even when battery is disconnected, keep VBAT rail on but + * set the charging current to minimum. + */ + charger_set_current(0); break; default: panic("Invalid charge port\n"); diff --git a/board/scarlet/board.h b/board/scarlet/board.h index 9958eadd4d..437dc45cd7 100644 --- a/board/scarlet/board.h +++ b/board/scarlet/board.h @@ -71,7 +71,6 @@ #define CONFIG_CHARGER #define CONFIG_CHARGER_RT9467 #define CONFIG_CHARGER_INPUT_CURRENT 512 -#define CONFIG_CHARGER_MAINTAIN_VBAT #define CONFIG_CHARGER_V2 #define CONFIG_CHARGER_MIN_BAT_PCT_FOR_POWER_ON 2 #define CONFIG_CHARGER_LIMIT_POWER_THRESH_BAT_PCT 2 |