diff options
| author | Aseda Aboagye <aaboagye@google.com> | 2020-01-16 15:17:33 -0800 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2020-01-21 23:55:45 +0000 |
| commit | 7616354e44fb36d2721bc6bdb6bd8d18697fd60b (patch) | |
| tree | 0eed47614d1feaf7211825b16fa172d026639103 /chip/it83xx/clock.c | |
| parent | 23b0af225ef6cc09d5725343a0b7ae211ad53f86 (diff) | |
| download | chrome-ec-7616354e44fb36d2721bc6bdb6bd8d18697fd60b.tar.gz | |
dedede: Add z-state support
Dedede has support for the new low power "Z-state". In this state. the
EC and H1 are unpowered, but power will be restored to the EC once one
of the wakeup events occurs. These events are ACOK, lid open, and a
power button press. This commit simply enables the Z-state when the EC
hibernates.
BUG=b:147819424
BRANCH=None
TEST=build and flash waddledoo, enter `hibernate`, verify that EC power
is turned off and can be restored by pressing the power button or
plugging in a charger.
Change-Id: I4f93efd0632f457354f4bf6bf0274b19a9cd799c
Signed-off-by: Aseda Aboagye <aaboagye@google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2006215
Tested-by: Aseda Aboagye <aaboagye@chromium.org>
Auto-Submit: Aseda Aboagye <aaboagye@chromium.org>
Reviewed-by: Diana Z <dzigterman@chromium.org>
Commit-Queue: Diana Z <dzigterman@chromium.org>
Diffstat (limited to 'chip/it83xx/clock.c')
| -rw-r--r-- | chip/it83xx/clock.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/chip/it83xx/clock.c b/chip/it83xx/clock.c index 7c679bffbe..0fd7335080 100644 --- a/chip/it83xx/clock.c +++ b/chip/it83xx/clock.c @@ -465,7 +465,12 @@ void __enter_hibernate(uint32_t seconds, uint32_t microseconds) } /* bit5: watchdog is disabled. */ IT83XX_ETWD_ETWCTRL |= BIT(5); - /* Setup GPIOs for hibernate */ + + /* + * Setup GPIOs for hibernate. On some boards, it's possible that this + * may not return at all. On those boards, power to the EC is likely + * being turn off entirely. + */ if (board_hibernate_late) board_hibernate_late(); |