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samus: remove learn mode workaround for new boards

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Remove learn mode workaround for backboosting on all new board
revisions, starting with board 1.

BUG=chrome-os-partner:34938
BRANCH=samus
TEST=load on board with board revision 1 and make sure local var
use_bkboost_workaround is 0.

Change-Id: Ieccd7f86baca72d231b5e1491db824e53472eff7
Signed-off-by: Alec Berg <alecaberg@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/241121
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
This commit is contained in:
Alec Berg
2015-01-15 15:26:19 -08:00
committed by ChromeOS Commit Bot
parent 3cb209aa8e
commit 7627bd21d0
1 changed files with 19 additions and 6 deletions
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25
board/samus/extpower.c
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@@ -16,6 +16,7 @@
#include "gpio.h"
#include "hooks.h"
#include "host_command.h"
#include "system.h"
#include "task.h"
#include "util.h"
@@ -70,20 +71,32 @@ static void extpower_board_hacks(int extpower)
/*
* Use discharge_on_ac() to workaround hardware backboosting
* charge circuit problems.
*
*/
int use_bkboost_workaround = (system_get_board_version() < 1);
/*
* When in G3, PP5000 needs to be enabled to accurately sense
* CC voltage when AC is attached. When AC is disconnceted
* it needs to be off to save power.
*/
if (extpower && !extpower_prev) {
charger_discharge_on_ac(0);
if (use_bkboost_workaround)
charger_discharge_on_ac(0);
set_pp5000_in_g3(PP5000_IN_G3_AC, 1);
} else if (extpower && extpower_prev) {
/* Glitch on AC_PRESENT, attempt to recover from backboost */
charger_discharge_on_ac(1);
charger_discharge_on_ac(0);
if (use_bkboost_workaround) {
/*
* Glitch on AC_PRESENT, attempt to recover from
* backboost
*/
charger_discharge_on_ac(1);
charger_discharge_on_ac(0);
}
} else {
charger_discharge_on_ac(1);
if (use_bkboost_workaround)
charger_discharge_on_ac(1);
set_pp5000_in_g3(PP5000_IN_G3_AC, 0);
}
extpower_prev = extpower;