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stm32f40xxx_rtcc ISR register and write protection fix

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This commit is contained in:
Eetu Nevalainen 2017-07-03 11:06:07 -06:00 committed by Gregory Nutt
parent 68315b7444
commit 21dcc8cbc7
1 changed files with 9 additions and 2 deletions
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11
arch/arm/src/stm32/stm32f40xxx_rtcc.c
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@ -600,6 +600,10 @@ static int stm32_rtc_alarm_handler(int irq, void *context, void *arg)
uint32_t cr;
int ret = OK;
/* Disable the write protection for RTC registers */
rtc_wprunlock();
isr = getreg32(STM32_RTC_ISR);
/* Check for EXTI from Alarm A or B and handle according */
@ -624,7 +628,7 @@ static int stm32_rtc_alarm_handler(int irq, void *context, void *arg)
}
isr = getreg32(STM32_RTC_ISR) & ~RTC_ISR_ALRAF;
putreg32(isr, STM32_RTC_CR);
putreg32(isr, STM32_RTC_ISR);
}
}
@ -649,11 +653,14 @@ static int stm32_rtc_alarm_handler(int irq, void *context, void *arg)
}
isr = getreg32(STM32_RTC_ISR) & ~RTC_ISR_ALRBF;
putreg32(isr, STM32_RTC_CR);
putreg32(isr, STM32_RTC_ISR);
}
}
#endif
/* Re-enable the write protection for RTC registers */
rtc_wprlock();
return ret;
}
#endif