diff options
| author | Philip Chen <philipchen@google.com> | 2018-12-27 18:42:02 -0800 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2019-01-05 14:52:12 -0800 |
| commit | edb881c3dded700075a7f0cda5465ccd4a96dcc4 (patch) | |
| tree | 33030713db67f738c7185acf7312db5815005e78 | |
| parent | 88f7e7992fde6b0797c72474c8cba827ade82492 (diff) | |
| download | chrome-ec-edb881c3dded700075a7f0cda5465ccd4a96dcc4.tar.gz | |
chip/stm32/clock: Cleanly clear pending RTC alarm IRQ
We want to reset RTC alarm and clear pending IRQ when EC wakes up
from deep sleep mode.
Unfortunately, RTC alarm IRQ is still latched and pending in NVIC unless
we explicitly clear the flag in ICPR register.
BUG=chromium:769503
BRANCH=scarlet
TEST=confirm RTC alarm irq is not fired after EC exits deep sleep mode
Change-Id: If6b9815337fbd24a0337116ef9c5fa1521671a93
Signed-off-by: Philip Chen <philipchen@google.com>
Reviewed-on: https://chromium-review.googlesource.com/1390947
Commit-Ready: Philip Chen <philipchen@chromium.org>
Tested-by: Philip Chen <philipchen@chromium.org>
Reviewed-by: Nicolas Boichat <drinkcat@chromium.org>
| -rw-r--r-- | chip/stm32/clock-f.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/chip/stm32/clock-f.c b/chip/stm32/clock-f.c index ee1c28dbb2..1872b0ce3c 100644 --- a/chip/stm32/clock-f.c +++ b/chip/stm32/clock-f.c @@ -254,6 +254,9 @@ void reset_rtc_alarm(struct rtc_time_reg *rtc) STM32_EXTI_IMR &= ~EXTI_RTC_ALR_EVENT; STM32_EXTI_PR = EXTI_RTC_ALR_EVENT; + /* Clear the pending RTC alarm IRQ in NVIC */ + task_clear_pending_irq(STM32_IRQ_RTC_ALARM); + /* Read current time */ rtc_read(rtc); |