diff options
| author | Jonathan Brandmeyer <jbrandmeyer@chromium.org> | 2018-07-10 14:11:15 -0600 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2018-07-11 23:06:45 -0700 |
| commit | caa47a8f560b48b0499520644bb0c6491875cf9c (patch) | |
| tree | 5634cf25c210c75e9e3b429c8c6fef8435d6c630 /include | |
| parent | febbdc42a4c1ddd8ec5cc6c46388aa84180f8ac7 (diff) | |
| download | chrome-ec-caa47a8f560b48b0499520644bb0c6491875cf9c.tar.gz | |
grunt,careena: Raise the charger current supremum.
Raise the current limit to the maximum Sink Standby limit allowable by
USB-PD. The former current limit is intended to improve compatibility
with BC1.2 chargers that brownout at the full 500 mA of supply.
However, there is a risk that it will also cause battery brownouts and
failure to boot in a startup condition of a highly imbalanced battery
pack. This startup condition may happen after an extended period of
rest prior to delivery to the end customer, which leads to poor customer
first impressions and a high RMA rate.
TEST=Grunt EVT clamshell and USB-PD analyzer, verify that the lowest
current drawn during an initial boot sequence is ~0.5A.
BRANCH=none
BUG=b:111214767
Change-Id: I4dc7b143fd947c1c5bbdb8787ab30f92e587ed47
Signed-off-by: Jonathan Brandmeyer <jbrandmeyer@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1133424
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Reviewed-by: Jett Rink <jettrink@chromium.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/config.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/include/config.h b/include/config.h index 7a0eadd75b..14b20f20a2 100644 --- a/include/config.h +++ b/include/config.h @@ -661,12 +661,13 @@ #undef CONFIG_CHARGER_ILIM_PIN_DISABLED /* - * Default input current for the board, in mA. + * Default input current for the board, in mA. Many boards also use this as the + * least maximum input current during transients. * * This value should depend on external power adapter, designed charging * voltage, and the maximum power of the running system. For type-C chargers, * this should be set to 512 mA in order to not brown-out low-current USB - * charge ports. + * charge ports in accordance with USB-PD r3.0 Sec. 7.3 */ #undef CONFIG_CHARGER_INPUT_CURRENT |