diff --git a/drivers/rtc/rtc-bd70528.c b/drivers/rtc/rtc-bd70528.c
index 4492b770422c..a255aac6740a 100644
--- a/drivers/rtc/rtc-bd70528.c
+++ b/drivers/rtc/rtc-bd70528.c
@@ -52,6 +52,7 @@ struct bd70528_rtc_alm {
 
 struct bd70528_rtc {
 	struct rohm_regmap_dev *parent;
+	struct regmap *regmap;
 	struct device *dev;
 	u8 reg_time_start;
 	bool has_rtc_timers;
@@ -234,9 +235,8 @@ static int bd71828_set_alarm(struct device *dev, struct rtc_wkalrm *a)
 	int ret;
 	struct bd71828_rtc_alm alm;
 	struct bd70528_rtc *r = dev_get_drvdata(dev);
-	struct rohm_regmap_dev *parent = r->parent;
 
-	ret = regmap_bulk_read(parent->regmap, BD71828_REG_RTC_ALM_START,
+	ret = regmap_bulk_read(r->regmap, BD71828_REG_RTC_ALM_START,
 			       &alm, sizeof(alm));
 	if (ret) {
 		dev_err(dev, "Failed to read alarm regs\n");
@@ -250,7 +250,7 @@ static int bd71828_set_alarm(struct device *dev, struct rtc_wkalrm *a)
 	else
 		alm.alm_mask |= BD70528_MASK_ALM_EN;
 
-	ret = regmap_bulk_write(parent->regmap, BD71828_REG_RTC_ALM_START,
+	ret = regmap_bulk_write(r->regmap, BD71828_REG_RTC_ALM_START,
 				&alm, sizeof(alm));
 	if (ret)
 		dev_err(dev, "Failed to set alarm time\n");
@@ -265,17 +265,16 @@ static int bd70528_set_alarm(struct device *dev, struct rtc_wkalrm *a)
 	struct bd70528_rtc_alm alm;
 	int ret;
 	struct bd70528_rtc *r = dev_get_drvdata(dev);
-	struct rohm_regmap_dev *parent = r->parent;
 
-	ret = regmap_bulk_read(parent->regmap, BD70528_REG_RTC_WAKE_START,
-			       &wake, sizeof(wake));
+	ret = regmap_bulk_read(r->regmap, BD70528_REG_RTC_WAKE_START, &wake,
+			       sizeof(wake));
 	if (ret) {
 		dev_err(dev, "Failed to read wake regs\n");
 		return ret;
 	}
 
-	ret = regmap_bulk_read(parent->regmap, BD70528_REG_RTC_ALM_START,
-			       &alm, sizeof(alm));
+	ret = regmap_bulk_read(r->regmap, BD70528_REG_RTC_ALM_START, &alm,
+			       sizeof(alm));
 	if (ret) {
 		dev_err(dev, "Failed to read alarm regs\n");
 		return ret;
@@ -292,15 +291,14 @@ static int bd70528_set_alarm(struct device *dev, struct rtc_wkalrm *a)
 		wake.ctrl &= ~BD70528_MASK_WAKE_EN;
 	}
 
-	ret = regmap_bulk_write(parent->regmap,
-				BD70528_REG_RTC_WAKE_START, &wake,
+	ret = regmap_bulk_write(r->regmap, BD70528_REG_RTC_WAKE_START, &wake,
 				sizeof(wake));
 	if (ret) {
 		dev_err(dev, "Failed to set wake time\n");
 		return ret;
 	}
-	ret = regmap_bulk_write(parent->regmap, BD70528_REG_RTC_ALM_START,
-				&alm, sizeof(alm));
+	ret = regmap_bulk_write(r->regmap, BD70528_REG_RTC_ALM_START, &alm,
+				sizeof(alm));
 	if (ret)
 		dev_err(dev, "Failed to set alarm time\n");
 
@@ -312,9 +310,8 @@ static int bd71828_read_alarm(struct device *dev, struct rtc_wkalrm *a)
 	int ret;
 	struct bd71828_rtc_alm alm;
 	struct bd70528_rtc *r = dev_get_drvdata(dev);
-	struct rohm_regmap_dev *parent = r->parent;
 
-	ret = regmap_bulk_read(parent->regmap, BD71828_REG_RTC_ALM_START,
+	ret = regmap_bulk_read(r->regmap, BD71828_REG_RTC_ALM_START,
 			       &alm, sizeof(alm));
 	if (ret) {
 		dev_err(dev, "Failed to read alarm regs\n");
@@ -336,10 +333,9 @@ static int bd70528_read_alarm(struct device *dev, struct rtc_wkalrm *a)
 	struct bd70528_rtc_alm alm;
 	int ret;
 	struct bd70528_rtc *r = dev_get_drvdata(dev);
-	struct rohm_regmap_dev *parent = r->parent;
 
-	ret = regmap_bulk_read(parent->regmap, BD70528_REG_RTC_ALM_START,
-			       &alm, sizeof(alm));
+	ret = regmap_bulk_read(r->regmap, BD70528_REG_RTC_ALM_START, &alm,
+			       sizeof(alm));
 	if (ret) {
 		dev_err(dev, "Failed to read alarm regs\n");
 		return ret;
@@ -360,14 +356,12 @@ static int bd70528_set_time_locked(struct device *dev, struct rtc_time *t)
 	int ret, tmpret, old_states;
 	struct bd70528_rtc_data rtc_data;
 	struct bd70528_rtc *r = dev_get_drvdata(dev);
-	struct rohm_regmap_dev *parent = r->parent;
 
 	ret = bd70528_disable_rtc_based_timers(r, &old_states);
 	if (ret)
 		return ret;
 
-	tmpret = regmap_bulk_read(parent->regmap,
-				  r->reg_time_start, &rtc_data,
+	tmpret = regmap_bulk_read(r->regmap, r->reg_time_start, &rtc_data,
 				  sizeof(rtc_data));
 	if (tmpret) {
 		dev_err(dev, "Failed to read RTC time registers\n");
@@ -375,8 +369,7 @@ static int bd70528_set_time_locked(struct device *dev, struct rtc_time *t)
 	}
 	tm2rtc(t, &rtc_data);
 
-	tmpret = regmap_bulk_write(parent->regmap,
-				   r->reg_time_start, &rtc_data,
+	tmpret = regmap_bulk_write(r->regmap, r->reg_time_start, &rtc_data,
 				   sizeof(rtc_data));
 	if (tmpret) {
 		dev_err(dev, "Failed to set RTC time\n");
@@ -410,13 +403,11 @@ static int bd70528_set_time(struct device *dev, struct rtc_time *t)
 static int bd70528_get_time(struct device *dev, struct rtc_time *t)
 {
 	struct bd70528_rtc *r = dev_get_drvdata(dev);
-	struct rohm_regmap_dev *parent = r->parent;
 	struct bd70528_rtc_data rtc_data;
 	int ret;
 
 	/* read the RTC date and time registers all at once */
-	ret = regmap_bulk_read(parent->regmap,
-			       r->reg_time_start, &rtc_data,
+	ret = regmap_bulk_read(r->regmap, r->reg_time_start, &rtc_data,
 			       sizeof(rtc_data));
 	if (ret) {
 		dev_err(dev, "Failed to read RTC time (err %d)\n", ret);
@@ -443,7 +434,7 @@ static int bd70528_alm_enable(struct device *dev, unsigned int enabled)
 		dev_err(dev, "Failed to change wake state\n");
 		goto out_unlock;
 	}
-	ret = regmap_update_bits(r->parent->regmap, BD70528_REG_RTC_ALM_MASK,
+	ret = regmap_update_bits(r->regmap, BD70528_REG_RTC_ALM_MASK,
 				 BD70528_MASK_ALM_EN, enableval);
 	if (ret)
 		dev_err(dev, "Failed to change alarm state\n");
@@ -462,7 +453,7 @@ static int bd71828_alm_enable(struct device *dev, unsigned int enabled)
 	if (!enabled)
 		enableval = 0;
 
-	ret = regmap_update_bits(r->parent->regmap, BD71828_REG_RTC_ALM0_MASK,
+	ret = regmap_update_bits(r->regmap, BD71828_REG_RTC_ALM0_MASK,
 				 BD70528_MASK_ALM_EN, enableval);
 	if (ret)
 		dev_err(dev, "Failed to change alarm state\n");
@@ -498,7 +489,6 @@ static int bd70528_probe(struct platform_device *pdev)
 {
 	struct bd70528_rtc *bd_rtc;
 	const struct rtc_class_ops *rtc_ops;
-	struct rohm_regmap_dev *parent;
 	const char *irq_name;
 	int ret;
 	struct rtc_device *rtc;
@@ -508,20 +498,25 @@ static int bd70528_probe(struct platform_device *pdev)
 	u8 hour_reg;
 	enum rohm_chip_type chip = platform_get_device_id(pdev)->driver_data;
 
-	parent = dev_get_drvdata(pdev->dev.parent);
-	if (!parent) {
-		dev_err(&pdev->dev, "No MFD driver data\n");
-		return -EINVAL;
-	}
 	bd_rtc = devm_kzalloc(&pdev->dev, sizeof(*bd_rtc), GFP_KERNEL);
 	if (!bd_rtc)
 		return -ENOMEM;
 
-	bd_rtc->parent = parent;
+	bd_rtc->regmap = dev_get_regmap(pdev->dev.parent, NULL);
+	if (!bd_rtc->regmap) {
+		dev_err(&pdev->dev, "No regmap\n");
+		return -EINVAL;
+	}
+
 	bd_rtc->dev = &pdev->dev;
 
 	switch (chip) {
 	case ROHM_CHIP_TYPE_BD70528:
+		bd_rtc->parent = dev_get_drvdata(pdev->dev.parent);
+		if (!bd_rtc->parent) {
+			dev_err(&pdev->dev, "No MFD data\n");
+			return -EINVAL;
+		}
 		irq_name = "bd70528-rtc-alm";
 		bd_rtc->has_rtc_timers = true;
 		bd_rtc->reg_time_start = BD70528_REG_RTC_START;
@@ -547,7 +542,7 @@ static int bd70528_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, bd_rtc);
 
-	ret = regmap_read(parent->regmap, hour_reg, &hr);
+	ret = regmap_read(bd_rtc->regmap, hour_reg, &hr);
 
 	if (ret) {
 		dev_err(&pdev->dev, "Failed to reag RTC clock\n");
@@ -595,7 +590,7 @@ static int bd70528_probe(struct platform_device *pdev)
 	 *  from sub-registers when IRQ is disabled or freed.
 	 */
 	if (enable_main_irq) {
-		ret = regmap_update_bits(parent->regmap,
+		ret = regmap_update_bits(bd_rtc->regmap,
 				 BD70528_REG_INT_MAIN_MASK,
 				 BD70528_INT_RTC_MASK, 0);
 		if (ret) {
