diff options
| author | Vijay Hiremath <vijay.p.hiremath@intel.com> | 2016-12-02 14:14:53 -0800 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2016-12-07 00:36:41 -0800 |
| commit | 81e20f0e589ecada5b30be3f64a09cc805b0a04a (patch) | |
| tree | b490589de475696c8da7268a010f2efbb39be6e3 | |
| parent | 515249a7d38c8c837e4fc5c414a67beb28516ba2 (diff) | |
| download | chrome-ec-81e20f0e589ecada5b30be3f64a09cc805b0a04a.tar.gz | |
charge_ramp: Reduce max ICL if VBUS drops on stable ramp
Some chargers lose VBUS even when ramp is stable and we re-ramp for
those chargers. It continues in loop. To avoid this issue, reduce
the max input current limit if VBUS drops on stable ramp.
BUG=chrome-os-partner:60544
BRANCH=none
TEST=Tested on Reef. Ramp settles to lower current and multiple
re-ramp is not observed.
Change-Id: I6c9ce4720d01b9e8e3215e8122f798076e516c19
Signed-off-by: Vijay Hiremath <vijay.p.hiremath@intel.com>
Reviewed-on: https://chromium-review.googlesource.com/416349
Commit-Ready: Vijay P Hiremath <vijay.p.hiremath@intel.com>
Tested-by: Vijay P Hiremath <vijay.p.hiremath@intel.com>
Tested-by: Rachel Nancollas <rachelsn@google.com>
Reviewed-by: Shawn N <shawnn@chromium.org>
| -rw-r--r-- | common/charge_ramp.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/common/charge_ramp.c b/common/charge_ramp.c index f7bd48662e..175592e030 100644 --- a/common/charge_ramp.c +++ b/common/charge_ramp.c @@ -305,6 +305,8 @@ void chg_ramp_task(void) if (board_is_ramp_allowed(active_sup) && board_is_vbus_too_low(CHG_RAMP_VBUS_STABLE)) { CPRINTS("VBUS low; Re-ramp"); + max_icl = MAX(min_icl, + max_icl - RAMP_ICL_BACKOFF); active_icl_new = min_icl; ramp_st_new = CHG_RAMP_RAMP; } |