* [PATCH] rtc: pm8xxx: Read ALARM_EN and update to alarm enabled status
@ 2020-12-24 11:28 Guixiong Wei
2021-01-12 22:46 ` Alexandre Belloni
0 siblings, 1 reply; 2+ messages in thread
From: Guixiong Wei @ 2020-12-24 11:28 UTC (permalink / raw)
To: a.zummo, alexandre.belloni; +Cc: linux-rtc, linux-kernel, Guixiong Wei
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@codeaurora.org>
---
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);
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] rtc: pm8xxx: Read ALARM_EN and update to alarm enabled status
2020-12-24 11:28 [PATCH] rtc: pm8xxx: Read ALARM_EN and update to alarm enabled status Guixiong Wei
@ 2021-01-12 22:46 ` Alexandre Belloni
0 siblings, 0 replies; 2+ messages in thread
From: Alexandre Belloni @ 2021-01-12 22:46 UTC (permalink / raw)
To: a.zummo, Guixiong Wei; +Cc: Alexandre Belloni, linux-kernel, linux-rtc
On Thu, 24 Dec 2020 19:28:57 +0800, Guixiong Wei wrote:
> 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.
Applied, thanks!
[1/1] rtc: pm8xxx: Read ALARM_EN and update to alarm enabled status
commit: 121f54efc3fb9854f581fede4f719a4aef7ed5b3
Best regards,
--
Alexandre Belloni <alexandre.belloni@bootlin.com>
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2021-01-12 22:46 ` Alexandre Belloni
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