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drivers: rtc: stm32 rtc driver disable alarm interrupt if not used

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Note that the Init of the alarm has no need for BCD2BIN conversion,
the LL_RTC_ALMx_Init will do. Add more log debug
The driver must clear the ALARM enable bit before wrting the alarm
registers.

Signed-off-by: Francois Ramu <francois.ramu@st.com>
This commit is contained in:
Francois Ramu 2024-05-21 16:07:43 +02:00 • committed by Maureen Helm
commit 6db2c2c2c1
1 changed files with 29 additions and 10 deletions
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35
drivers/rtc/rtc_ll_stm32.c
View file

@ -187,7 +187,10 @@ static inline ErrorStatus rtc_stm32_init_alarm(RTC_TypeDef *rtc, uint32_t format
LL_RTC_AlarmTypeDef *ll_alarm_struct, uint16_t id)
{
ll_alarm_struct->AlarmDateWeekDaySel = RTC_STM32_ALRM_DATEWEEKDAYSEL_DATE;
/* RTC write protection is disabled & enabled again inside LL_RTC_ALMx_Init functions */
/*
* RTC write protection is disabled & enabled again inside LL_RTC_ALMx_Init functions
* The LL_RTC_ALMx_Init does convert bin2bcd by itself
*/
if (id == RTC_STM32_ALRM_A) {
return LL_RTC_ALMA_Init(rtc, format, ll_alarm_struct);
}
@ -776,6 +779,7 @@ static int rtc_stm32_alarm_set_time(const struct device *dev, uint16_t id, uint1
if (rtc_stm32_is_active_alarm(RTC, id)) {
LL_RTC_DisableWriteProtection(RTC);
rtc_stm32_disable_alarm(RTC, id);
rtc_stm32_disable_interrupt_alarm(RTC, id);
LL_RTC_EnableWriteProtection(RTC);
}
LOG_DBG("Alarm %d has been disabled", id);
@ -808,9 +812,9 @@ static int rtc_stm32_alarm_set_time(const struct device *dev, uint16_t id, uint1
p_rtc_alrm->user_mask = mask;
LOG_DBG("set alarm: second = %d, min = %d, hour = %d,"
LOG_DBG("set alarm %d : second = %d, min = %d, hour = %d,"
" wday = %d, mday = %d, mask = 0x%04x",
timeptr->tm_sec, timeptr->tm_min, timeptr->tm_hour,
id, timeptr->tm_sec, timeptr->tm_min, timeptr->tm_hour,
timeptr->tm_wday, timeptr->tm_mday, mask);
#if RTC_STM32_BACKUP_DOMAIN_WRITE_PROTECTION
@ -820,15 +824,14 @@ static int rtc_stm32_alarm_set_time(const struct device *dev, uint16_t id, uint1
/* Disable the write protection for RTC registers */
LL_RTC_DisableWriteProtection(RTC);
if (rtc_stm32_is_active_alarm(RTC, id)) {
/* Disable Alarm if already active */
/* Disable ALARM so that the RTC_ISR_ALRAWF/RTC_ISR_ALRBWF is 0 */
rtc_stm32_disable_alarm(RTC, id);
}
rtc_stm32_disable_interrupt_alarm(RTC, id);
#ifdef RTC_ISR_ALRAWF
if (id == RTC_STM32_ALRM_A) {
/* Wait till RTC ALRAWF flag is set before writing to RTC registers */
while ((LL_RTC_ReadReg(RTC, ISR) & RTC_ISR_ALRAWF) == 0U) {
while (!LL_RTC_IsActiveFlag_ALRAW(RTC)) {
;
}
}
@ -837,7 +840,7 @@ static int rtc_stm32_alarm_set_time(const struct device *dev, uint16_t id, uint1
#ifdef RTC_ISR_ALRBWF
if (id == RTC_STM32_ALRM_B) {
/* Wait till RTC ALRBWF flag is set before writing to RTC registers */
while ((LL_RTC_ReadReg(RTC, ISR) & RTC_ISR_ALRBWF) == 0U) {
while (!LL_RTC_IsActiveFlag_ALRBW(RTC)) {
;
}
}
@ -874,6 +877,22 @@ disable_bkup_access:
unlock:
k_mutex_unlock(&data->lock);
if (id == RTC_STM32_ALRM_A) {
LOG_DBG("Alarm A : %dh%dm%ds mask = 0x%x",
LL_RTC_ALMA_GetHour(RTC),
LL_RTC_ALMA_GetMinute(RTC),
LL_RTC_ALMA_GetSecond(RTC),
LL_RTC_ALMA_GetMask(RTC));
}
#ifdef RTC_ALARM_B
if (id == RTC_STM32_ALRM_B) {
LOG_DBG("Alarm B : %dh%dm%ds mask = 0x%x",
LL_RTC_ALMB_GetHour(RTC),
LL_RTC_ALMB_GetMinute(RTC),
LL_RTC_ALMB_GetSecond(RTC),
LL_RTC_ALMB_GetMask(RTC));
}
#endif /* #ifdef RTC_ALARM_B */
return err;
}