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| author | reno.wang <reno.wang@lcfc.corp-partner.google.com> | 2021-12-09 14:10:48 +0800 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2022-02-25 03:29:55 +0000 |
| commit | 1e194f6d1a1d821e625f86f38864b2ed1c347263 (patch) | |
| tree | 78961223a1abb3ecc88f0c09b839e8e48771b988 | |
| parent | 2a110e0f80cf70cec1b0d9bd84690ab55bfd2bf9 (diff) | |
| download | chrome-ec-1e194f6d1a1d821e625f86f38864b2ed1c347263.tar.gz | |
treeya: undef hibernate psl and keep KSI1/3 high in deep sleep
It's workaround to reduce keyboard's "Silver Migration".
From keyboard vendor's feedback, there are two factors to cause "Silver
Migration".
1. A voltage potential between trace
2. The presence of an electrolyte , such as moisture.
The reason cause voltage potential between KSIxx trace is EC enter ec
hibernate PSL and turn EC's VCC1 power off. Besides KSI2, the other
KSIxx will be turn off. KSI2 is powered by H1.
To avoid voltage potential is keep KSI1, KSI2, and KSI3 on. That means
not to enter ec hibernate PSL.
BUG=b:214155147
BRANCH=None
TEST=make -j BOARD=treeya, KSIxx keep 3.3V under DC mode after calling
system_hibernate().
Signed-off-by: reno.wang <reno.wang@lcfc.corp-partner.google.com>
Change-Id: I36c9d945a836ad54aa33d5af02d3a69ae57f1d29
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3325632
Reviewed-by: Martin Roth <martinroth@google.com>
| -rw-r--r-- | board/treeya/board.c | 5 | ||||
| -rw-r--r-- | board/treeya/board.h | 14 |
2 files changed, 19 insertions, 0 deletions
diff --git a/board/treeya/board.c b/board/treeya/board.c index eb6985b7e0..58ae880a89 100644 --- a/board/treeya/board.c +++ b/board/treeya/board.c @@ -197,3 +197,8 @@ void board_bmi160_lsm6dsm_interrupt(enum gpio_signal signal) } #endif + +void board_hibernate_late(void) +{ + NPCX_KBSINPU = 0x0A; +} diff --git a/board/treeya/board.h b/board/treeya/board.h index 4bda4cb64c..d3809b3fda 100644 --- a/board/treeya/board.h +++ b/board/treeya/board.h @@ -12,6 +12,20 @@ #include "baseboard.h" +/* b/203442963 + * It's workaround to reduce keyboard's "Silver Migration". + * From keyboard vendor's feedback, there are two factors to cause + * "Silver Migration". + * 1. A voltage potential between trace. + * 2. The presence of an electrolyte , such as moisture. + * The reason cause voltage potential between KSIxx trace is EC enter ec + * hibernate PSL and turn EC's VCC1 power off. Besides KSI2, the other + * KSIxx will be turn off. KSI2 is powered by H1. + * To avoid voltage potential is keep KSIxx on. That means not to enter + * ec hibernate PSL. + */ +#undef CONFIG_HIBERNATE_PSL + /* * By default, enable all console messages excepted HC, ACPI and event: * The sensor stack is generating a lot of activity. |