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| author | Louis Yung-Chieh Lo <yjlou@chromium.org> | 2014-02-12 16:37:56 +0800 |
|---|---|---|
| committer | chrome-internal-fetch <chrome-internal-fetch@google.com> | 2014-03-06 23:14:07 +0000 |
| commit | 1484116cb0173bce860c4a26aaf5d9625824a401 (patch) | |
| tree | 22a2d036e2586f7735a83dd7ddba8c15707115e8 /power/tegra.c | |
| parent | 6bdc69940188cd4f17ecde547afbbc3ad8335367 (diff) | |
| download | chrome-ec-1484116cb0173bce860c4a26aaf5d9625824a401.tar.gz | |
stm32l: supports fake-hibernate
We don't have available GPIO pin for power button as the hibernate
(stand-by) wake-up source. Also, we don't want to do board change.
So, put the EC in a decent infinite loop to pretend the hibernate mode
and wait for particular wake-up event. This should be fine because
the AP is already down before EC hibernates.
BUG=chrome-os-partner:25435
BRANCH=Nyan
TEST=see comment #6 of issue for detailed test steps.
Change-Id: I2cae131789f9ca5808b60d5f2495222ca9016e7c
Signed-off-by: Louis Yung-Chieh Lo <yjlou@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/186061
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Diffstat (limited to 'power/tegra.c')
| -rw-r--r-- | power/tegra.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/power/tegra.c b/power/tegra.c index 021626ee93..4ca3a172f3 100644 --- a/power/tegra.c +++ b/power/tegra.c @@ -318,6 +318,10 @@ static void power_on(void) { uint64_t t; + /* Set pull-up and enable interrupt */ + gpio_set_flags(GPIO_SUSPEND_L, GPIO_INPUT | GPIO_PULL_UP | + GPIO_INT_BOTH); + /* Make sure we de-assert the PMI_THERM_L and AP_RESET_L pin. */ set_pmic_therm(0); set_ap_reset(0); @@ -390,6 +394,9 @@ static void power_off(void) /* switch off all rails */ chipset_force_shutdown(); + /* Change SUSPEND_L pin to high-Z to reduce power draw. */ + gpio_set_flags(GPIO_SUSPEND_L, GPIO_INPUT); + lid_opened = 0; enable_sleep(SLEEP_MASK_AP_RUN); powerled_set_state(POWERLED_STATE_OFF); |