diff options
| author | Ben Lok <ben.lok@mediatek.com> | 2015-10-20 20:38:34 +0800 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2015-11-03 09:08:20 -0800 |
| commit | b1a3d8eda54e06bf2cf99bc7dd6abfa368a5bdab (patch) | |
| tree | b9b1d186ff0dec9f2699b8b5b378e3a7d8429b0e /power | |
| parent | 80b997dc276b099714e1c5b6eeea02adbae44081 (diff) | |
| download | chrome-ec-b1a3d8eda54e06bf2cf99bc7dd6abfa368a5bdab.tar.gz | |
oak: handle the warm reset key from servo board
Warm reset key from servo board lets the POWER_GOOD signal
deasserted temporarily (about 1~2 seconds) since Oak rev4.
In order to detect this case, check the AP_RESET_L status,
ignore the transient state if reset key is pressing.
BUG=chrome-os-partner:46655
BRANCH=none
TEST=make buildall -j;
Press warm reset key of servo board, AP should reset normally.
Change-Id: Ib9f111d2273cde61354e72367fe74d4ee15d2291
Signed-off-by: Ben Lok <ben.lok@mediatek.com>
Reviewed-on: https://chromium-review.googlesource.com/307201
Tested-by: Yidi Lin <yidi.lin@mediatek.com>
Reviewed-by: Rong Chang <rongchang@chromium.org>
Diffstat (limited to 'power')
| -rw-r--r-- | power/mediatek.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/power/mediatek.c b/power/mediatek.c index 49b9154edf..87ccec5629 100644 --- a/power/mediatek.c +++ b/power/mediatek.c @@ -225,6 +225,18 @@ static int is_power_good_asserted(void) */ static int is_power_good_deasserted(void) { + /* + * Warm reset key from servo board lets the POWER_GOOD signal + * deasserted temporarily (about 1~2 seconds) on rev4. + * In order to detect this case, check the AP_RESET_L status, + * ignore the transient state if reset key is pressing. + */ + if (system_get_board_version() >= 4) { + if (0 == gpio_get_level(GPIO_AP_RESET_L)) { + return 0; + } + } + if (!(power_get_signals() & IN_POWER_GOOD)) usleep(POWER_DEBOUNCE_TIME); |