ALARM_EN status is retained in PMIC register after device shutdown
if poweron_alarm is enabled. Read it to make sure the driver has
consistent value with the register status.
Signed-off-by: Guixiong Wei <guixiong@xxxxxxxxxxxxxx>
---
drivers/rtc/rtc-pm8xxx.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/rtc/rtc-pm8xxx.c b/drivers/rtc/rtc-pm8xxx.c
index 0d9dd6f..70d1ff5 100644
--- a/drivers/rtc/rtc-pm8xxx.c
+++ b/drivers/rtc/rtc-pm8xxx.c
@@ -20,6 +20,7 @@
/* RTC_CTRL register bit fields */
#define PM8xxx_RTC_ENABLE BIT(7)
#define PM8xxx_RTC_ALARM_CLEAR BIT(0)
+#define PM8xxx_RTC_ALARM_ENABLE BIT(7)
#define NUM_8_BIT_RTC_REGS 0x4
@@ -265,6 +266,7 @@ static int pm8xxx_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
static int pm8xxx_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
{
int rc;
+ unsigned int ctrl_reg;
u8 value[NUM_8_BIT_RTC_REGS];
unsigned long secs;
struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev);
@@ -282,6 +284,13 @@ static int pm8xxx_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
rtc_time64_to_tm(secs, &alarm->time);
+ rc = regmap_read(rtc_dd->regmap, regs->alarm_ctrl, &ctrl_reg);
+ if (rc) {
+ dev_err(dev, "Read from RTC alarm control register failed\n");
+ return rc;
+ }
+ alarm->enabled = !!(ctrl_reg & PM8xxx_RTC_ALARM_ENABLE);
+
dev_dbg(dev, "Alarm set for - h:m:s=%ptRt, y-m-d=%ptRdr\n",
&alarm->time, &alarm->time);
--
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