bartoszek/zephyr
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

drivers: rtc: stm32: narrow backup domain access window during interrupts

Browse Source 
Change backup domain access gating in STM32 RTC interrupt handler
to only request access when RTC registers ar to be modified
instead of during the whole RTC interrupts service including
interrupt consumer callback execution.

Signed-off-by: Etienne Carriere <etienne.carriere@foss.st.com>
This commit is contained in:
Etienne Carriere 2025-07-02 12:09:59 +02:00 committed by Daniel DeGrasse
parent 007d3e3c85
commit 9b022972d8
1 changed files with 2 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/rtc/rtc_ll_stm32.c
View File

@ -283,13 +283,13 @@ void rtc_stm32_isr(const struct device *dev)
struct rtc_stm32_alrm *p_rtc_alrm;
int id = 0;
stm32_backup_domain_enable_access();
for (id = 0; id < RTC_STM32_ALARMS_COUNT; id++) {
if (rtc_stm32_is_active_alarm(RTC, (uint16_t)id) != 0) {
stm32_backup_domain_enable_access();
LL_RTC_DisableWriteProtection(RTC);
rtc_stm32_clear_alarm_flag(RTC, (uint16_t)id);
LL_RTC_EnableWriteProtection(RTC);
stm32_backup_domain_disable_access();
if (id == RTC_STM32_ALRM_A) {
p_rtc_alrm = &(data->rtc_alrm_a);
@ -305,8 +305,6 @@ void rtc_stm32_isr(const struct device *dev)
}
}
stm32_backup_domain_disable_access();
ll_func_exti_clear_rtc_alarm_flag(RTC_STM32_EXTI_LINE);
}