diff --git a/drivers/rtc/rtc-pcf85363.c b/drivers/rtc/rtc-pcf85363.c
index 540042b9eec8..c03d5a65c5f7 100644
--- a/drivers/rtc/rtc-pcf85363.c
+++ b/drivers/rtc/rtc-pcf85363.c
@@ -14,6 +14,7 @@
 #include <linux/err.h>
 #include <linux/errno.h>
 #include <linux/bcd.h>
+#include <linux/device.h>
 #include <linux/of.h>
 #include <linux/regmap.h>
 
@@ -295,23 +296,67 @@ static int pcf85363_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
 static irqreturn_t pcf85363_rtc_handle_irq(int irq, void *dev_id)
 {
 	struct pcf85363 *pcf85363 = i2c_get_clientdata(dev_id);
+	bool handled = false;
 	unsigned int flags;
 	int err;
 
 	err = regmap_read(pcf85363->regmap, CTRL_FLAGS, &flags);
+
 	if (err)
 		return IRQ_NONE;
 
+	if (flags) {
+		dev_dbg(&pcf85363->rtc->dev, "IRQ flags: 0x%02x%s%s\n",
+			flags, (flags & FLAGS_A1F) ? " [A1F]" : "",
+			(flags & FLAGS_BSF) ? " [BSF]" : "");
+	}
+
 	if (flags & FLAGS_A1F) {
 		rtc_update_irq(pcf85363->rtc, 1, RTC_IRQF | RTC_AF);
 		regmap_update_bits(pcf85363->regmap, CTRL_FLAGS, FLAGS_A1F, 0);
-		return IRQ_HANDLED;
+		handled = true;
 	}
 
-	return IRQ_NONE;
+	if (flags & FLAGS_BSF) {
+		regmap_update_bits(pcf85363->regmap, CTRL_FLAGS, FLAGS_BSF, 0);
+		handled = true;
+	}
+
+	return handled ? IRQ_HANDLED : IRQ_NONE;
+}
+
+static int pcf85363_rtc_ioctl(struct device *dev,
+			      unsigned int cmd, unsigned long arg)
+{
+	struct pcf85363 *pcf85363 = dev_get_drvdata(dev);
+	unsigned int val;
+	int ret;
+
+	switch (cmd) {
+	case RTC_VL_READ: {
+		u32 status = 0;
+
+		ret = regmap_read(pcf85363->regmap, CTRL_FLAGS, &val);
+
+		if (ret)
+			return ret;
+
+		if (val & FLAGS_BSF)
+			status |= RTC_VL_BACKUP_SWITCH;
+
+		return put_user(status, (u32 __user *)arg);
+	}
+
+	case RTC_VL_CLR:
+		return regmap_update_bits(pcf85363->regmap, CTRL_FLAGS, FLAGS_BSF, 0);
+
+	default:
+		return -ENOIOCTLCMD;
+	}
 }
 
 static const struct rtc_class_ops rtc_ops = {
+	.ioctl  = pcf85363_rtc_ioctl,
 	.read_time	= pcf85363_rtc_read_time,
 	.set_time	= pcf85363_rtc_set_time,
 	.read_alarm	= pcf85363_rtc_read_alarm,