diff options
| author | Edward Hill <ecgh@chromium.org> | 2018-11-27 12:40:17 -0700 |
|---|---|---|
| committer | ChromeOS Commit Bot <chromeos-commit-bot@chromium.org> | 2018-11-29 20:21:33 +0000 |
| commit | fe6034e36dd260d336acb66a890f2341e818707b (patch) | |
| tree | d69162ede8ed88115543c6e415806568dc079402 /baseboard | |
| parent | 9784183ede8b35294b64a59f5dfb2748fc55dd5f (diff) | |
| download | chrome-ec-fe6034e36dd260d336acb66a890f2341e818707b.tar.gz | |
grunt: Enable PPC sink FET before hibernating
Some versions of some boards keep the port 0 PPC powered on while
the EC hibernates (so Closed Case Debugging keeps working).
Make sure the source FET is off and turn on the sink FET, so that
plugging in AC will wake the EC. This matches the dead-battery
behavior of the powered off PPC.
BUG=b:119850162,b:113654692
BRANCH=grunt
TEST=1) "ectool reboot_ec hibernate", wake on port 0 AC.
2) AP in S0, sink in port 0, EC console: "hibernate", unplug sink,
wake on port 0 AC.
Change-Id: I4dd7ebe5408bbb2d4c92da1a44ea8b4152dbb7da
Signed-off-by: Edward Hill <ecgh@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1352059
Reviewed-by: Raul E Rangel <rrangel@chromium.org>
Reviewed-by: Jett Rink <jettrink@chromium.org>
(cherry picked from commit a478633db9e11c2300c113c8fb959adc9c894037)
Reviewed-on: https://chromium-review.googlesource.com/c/1351928
Diffstat (limited to 'baseboard')
| -rw-r--r-- | baseboard/grunt/baseboard.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/baseboard/grunt/baseboard.c b/baseboard/grunt/baseboard.c index 1c0d0d55fc..579b7758c5 100644 --- a/baseboard/grunt/baseboard.c +++ b/baseboard/grunt/baseboard.c @@ -586,3 +586,16 @@ uint32_t board_override_feature_flags1(uint32_t flags1) { return flags1; } + +void board_hibernate(void) +{ + /* + * Some versions of some boards keep the port 0 PPC powered on while + * the EC hibernates (so Closed Case Debugging keeps working). + * Make sure the source FET is off and turn on the sink FET, so that + * plugging in AC will wake the EC. This matches the dead-battery + * behavior of the powered off PPC. + */ + ppc_vbus_source_enable(0, 0); + ppc_vbus_sink_enable(0, 1); +} |