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rtc: pm8xxx: clear alarm register when alarm is not enabled

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Clear alarm register when alarm is not enabled otherwise the consumer
may still start alarm timer if it find the alarm register is not zero.

Signed-off-by: hankecai <hankecai@vivo.com>
Link: https://lore.kernel.org/r/APoAZgAaCEiRpKG6PlzreaqE.1.1584791417367.Hmail.hankecai@vivo.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
韩科才 2020-03-21 19:50:17 +08:00 committed by Alexandre Belloni
parent 4828a82e29
commit 34ce29774d
1 changed files with 11 additions and 0 deletions
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11
drivers/rtc/rtc-pm8xxx.c
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@ -295,6 +295,7 @@ static int pm8xxx_rtc_alarm_irq_enable(struct device *dev, unsigned int enable)
struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev);
const struct pm8xxx_rtc_regs *regs = rtc_dd->regs;
unsigned int ctrl_reg;
u8 value[NUM_8_BIT_RTC_REGS] = {0};
spin_lock_irqsave(&rtc_dd->ctrl_reg_lock, irq_flags);
@ -313,6 +314,16 @@ static int pm8xxx_rtc_alarm_irq_enable(struct device *dev, unsigned int enable)
goto rtc_rw_fail;
}
/* Clear Alarm register */
if (!enable) {
rc = regmap_bulk_write(rtc_dd->regmap, regs->alarm_rw, value,
sizeof(value));
if (rc) {
dev_err(dev, "Clear RTC ALARM register failed\n");
goto rtc_rw_fail;
}
}
rtc_rw_fail:
spin_unlock_irqrestore(&rtc_dd->ctrl_reg_lock, irq_flags);
return rc;