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reef: Discharge on AC till charger is detected

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To avoid inrush current from the external charger, enable discharge
on AC till the new charger is detected and charge detect delay has
passed.

BUG=chrome-os-partner:60547
BRANCH=none
TEST=Multiple Ramp Resets and inrush current is not observed.

Change-Id: Ie3317fa6e6c2e8f00d4ce7cb9c6bee81c50d7bb2
Signed-off-by: Vijay Hiremath <vijay.p.hiremath@intel.com>
Reviewed-on: https://chromium-review.googlesource.com/417168
Commit-Ready: Vijay P Hiremath <vijay.p.hiremath@intel.com>
Tested-by: Vijay P Hiremath <vijay.p.hiremath@intel.com>
Reviewed-by: Shawn N <shawnn@chromium.org>
This commit is contained in:
Vijay Hiremath
2016-12-06 19:06:56 -08:00
committed by chrome-bot
parent 80d5601f39
commit d3e662bf77
2 changed files with 17 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
board/reef/battery.c
View File

@@ -8,6 +8,7 @@
#include "battery.h"
#include "battery_smart.h"
#include "bd9995x.h"
#include "charge_ramp.h"
#include "charge_state.h"
#include "console.h"
#include "ec_commands.h"
@@ -279,11 +280,17 @@ int charger_profile_override(struct charge_state_data *curr)
*
* To overcome this issue enable the battery learning operation
* and suspend USB charging and DC/DC converter.
*
* And also to avoid inrush current from the external charger, enable
* discharge on AC till the new charger is detected and charge detect
* delay has passed.
*/
disch_on_ac = curr->batt.is_present == BP_YES &&
disch_on_ac = (curr->batt.is_present == BP_YES &&
!battery_is_cut_off() &&
!(curr->batt.flags & BATT_FLAG_WANT_CHARGE) &&
curr->batt.status & STATUS_FULLY_CHARGED;
curr->batt.status & STATUS_FULLY_CHARGED) ||
(!chg_ramp_is_detected() &&
curr->batt.state_of_charge > 2);
charger_discharge_on_ac(disch_on_ac);

8
board/reef/board.c
View File

@@ -568,6 +568,14 @@ int board_set_active_charge_port(int charge_port)
case CHARGE_PORT_NONE:
bd9995x_port_select = 0;
bd9995x_port = BD9995X_CHARGE_PORT_BOTH;
/*
* To avoid inrush current from the external charger, enable
* discharge on AC till the new charger is detected and
* charge detect delay has passed.
*/
if (charge_get_percent() > 2)
charger_discharge_on_ac(1);
break;
default:
panic("Invalid charge port\n");