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arch: cxd56xx: Fix RTC alarm cancellation process

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There is an issue that the next alarm is expired immediately after
canceling a RTC alarm. Fixed alarm settings to be completely cleared
when canceling an RTC alarm.
This commit is contained in:
SPRESENSE 2021-05-19 17:04:01 +09:00 committed by Alin Jerpelea
parent 67a56410ee
commit 89fd987a1a
1 changed files with 35 additions and 1 deletions
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36
arch/arm/src/cxd56xx/cxd56_rtc.c
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@ -542,6 +542,7 @@ int cxd56_rtc_setalarm(FAR struct alm_setalarm_s *alminfo)
int ret = -EBUSY;
int id;
uint64_t count;
uint32_t mask;
ASSERT(alminfo != NULL);
DEBUGASSERT(RTC_ALARM_LAST > alminfo->as_id);
@ -565,6 +566,13 @@ int cxd56_rtc_setalarm(FAR struct alm_setalarm_s *alminfo)
count -= g_rtc_save->offset;
/* clear previsous setting */
mask = RTCREG_ALM0_ERR_FLAG_MASK | RTCREG_ALM0_FLAG_MASK;
mask <<= id;
putreg32(mask, CXD56_RTC0_ALMCLR);
/* wait until previous alarm request is completed */
while (RTCREG_ASET_BUSY_MASK & getreg32(CXD56_RTC0_SETALMPRECNT(id)));
@ -609,10 +617,11 @@ int cxd56_rtc_cancelalarm(enum alm_id_e alarmid)
FAR struct alm_cbinfo_s *cbinfo;
irqstate_t flags;
int ret = -ENODATA;
uint32_t mask;
DEBUGASSERT(RTC_ALARM_LAST > alarmid);
/* Set the alarm in hardware and enable interrupts */
/* Cancel the alarm in hardware and clear interrupts */
cbinfo = &g_alarmcb[alarmid];
@ -628,6 +637,31 @@ int cxd56_rtc_cancelalarm(enum alm_id_e alarmid)
putreg32(0, CXD56_RTC0_ALMOUTEN(alarmid));
while (RTCREG_ALM_BUSY_MASK & getreg32(CXD56_RTC0_ALMOUTEN(alarmid)));
/* wait until previous alarm request is completed */
while (RTCREG_ASET_BUSY_MASK &
getreg32(CXD56_RTC0_SETALMPRECNT(alarmid)));
/* clear the alarm counter */
putreg32(0, CXD56_RTC0_SETALMPOSTCNT(alarmid));
putreg32(0, CXD56_RTC0_SETALMPRECNT(alarmid));
while (RTCREG_ASET_BUSY_MASK &
getreg32(CXD56_RTC0_SETALMPRECNT(alarmid)));
/* wait until the interrupt flag is clear */
mask = RTCREG_ALM0_ERR_FLAG_MASK | RTCREG_ALM0_FLAG_MASK;
mask <<= alarmid;
while (mask & getreg32(CXD56_RTC0_ALMFLG))
{
putreg32(mask, CXD56_RTC0_ALMCLR);
}
spin_unlock_irqrestore(NULL, flags);
ret = OK;