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Subject[PATCH] rtc-pm8xxx: Clear Alarm register on resume
Date
Currently, alarm register is not cleared on resume
leading to reboot during power off charging mode.

Signed-off-by: Mohit Aggarwal <maggarwa@codeaurora.org>
---
drivers/rtc/rtc-pm8xxx.c | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/rtc/rtc-pm8xxx.c b/drivers/rtc/rtc-pm8xxx.c
index bbe013f..96e7985 100644
--- a/drivers/rtc/rtc-pm8xxx.c
+++ b/drivers/rtc/rtc-pm8xxx.c
@@ -1,5 +1,5 @@
// SPDX-License-Identifier: GPL-2.0-only
-/* Copyright (c) 2010-2011, 2019, The Linux Foundation. All rights reserved. */
+/* Copyright (c) 2010-2011, 2019-2020, The Linux Foundation. All rights reserved. */

#include <linux/of.h>
#include <linux/module.h>
@@ -301,6 +301,7 @@ 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);

@@ -319,6 +320,16 @@ 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, "Write to RTC ALARM register failed\n");
+ goto rtc_rw_fail;
+ }
+ }
+
rtc_rw_fail:
spin_unlock_irqrestore(&rtc_dd->ctrl_reg_lock, irq_flags);
return rc;
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
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