diff --git a/drivers/mfd/sec-core.c b/drivers/mfd/sec-core.c
index 34c18fb8c0896b46f49de48b4d5631a5d780a811..54cc25546592c7c7a1ba113104ca96fa5cacab83 100644
--- a/drivers/mfd/sec-core.c
+++ b/drivers/mfd/sec-core.c
@@ -81,31 +81,31 @@ static struct of_device_id sec_dt_match[] = {
 
 int sec_reg_read(struct sec_pmic_dev *sec_pmic, u8 reg, void *dest)
 {
-	return regmap_read(sec_pmic->regmap, reg, dest);
+	return regmap_read(sec_pmic->regmap_pmic, reg, dest);
 }
 EXPORT_SYMBOL_GPL(sec_reg_read);
 
 int sec_bulk_read(struct sec_pmic_dev *sec_pmic, u8 reg, int count, u8 *buf)
 {
-	return regmap_bulk_read(sec_pmic->regmap, reg, buf, count);
+	return regmap_bulk_read(sec_pmic->regmap_pmic, reg, buf, count);
 }
 EXPORT_SYMBOL_GPL(sec_bulk_read);
 
 int sec_reg_write(struct sec_pmic_dev *sec_pmic, u8 reg, u8 value)
 {
-	return regmap_write(sec_pmic->regmap, reg, value);
+	return regmap_write(sec_pmic->regmap_pmic, reg, value);
 }
 EXPORT_SYMBOL_GPL(sec_reg_write);
 
 int sec_bulk_write(struct sec_pmic_dev *sec_pmic, u8 reg, int count, u8 *buf)
 {
-	return regmap_raw_write(sec_pmic->regmap, reg, buf, count);
+	return regmap_raw_write(sec_pmic->regmap_pmic, reg, buf, count);
 }
 EXPORT_SYMBOL_GPL(sec_bulk_write);
 
 int sec_reg_update(struct sec_pmic_dev *sec_pmic, u8 reg, u8 val, u8 mask)
 {
-	return regmap_update_bits(sec_pmic->regmap, reg, mask, val);
+	return regmap_update_bits(sec_pmic->regmap_pmic, reg, mask, val);
 }
 EXPORT_SYMBOL_GPL(sec_reg_update);
 
@@ -166,6 +166,11 @@ static struct regmap_config s5m8767_regmap_config = {
 	.cache_type = REGCACHE_FLAT,
 };
 
+static const struct regmap_config sec_rtc_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+};
+
 #ifdef CONFIG_OF
 /*
  * Only the common platform data elements for s5m8767 are parsed here from the
@@ -266,9 +271,9 @@ static int sec_pmic_probe(struct i2c_client *i2c,
 		break;
 	}
 
-	sec_pmic->regmap = devm_regmap_init_i2c(i2c, regmap);
-	if (IS_ERR(sec_pmic->regmap)) {
-		ret = PTR_ERR(sec_pmic->regmap);
+	sec_pmic->regmap_pmic = devm_regmap_init_i2c(i2c, regmap);
+	if (IS_ERR(sec_pmic->regmap_pmic)) {
+		ret = PTR_ERR(sec_pmic->regmap_pmic);
 		dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
 			ret);
 		return ret;
@@ -277,6 +282,15 @@ static int sec_pmic_probe(struct i2c_client *i2c,
 	sec_pmic->rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR);
 	i2c_set_clientdata(sec_pmic->rtc, sec_pmic);
 
+	sec_pmic->regmap_rtc = devm_regmap_init_i2c(sec_pmic->rtc,
+			&sec_rtc_regmap_config);
+	if (IS_ERR(sec_pmic->regmap_rtc)) {
+		ret = PTR_ERR(sec_pmic->regmap_rtc);
+		dev_err(&i2c->dev, "Failed to allocate RTC register map: %d\n",
+			ret);
+		return ret;
+	}
+
 	if (pdata && pdata->cfg_pmic_irq)
 		pdata->cfg_pmic_irq();
 
diff --git a/drivers/mfd/sec-irq.c b/drivers/mfd/sec-irq.c
index 0dd84e99081e9d30539ab96cccc255591a18be82..b441b1be27cbe9165bd66f94e26c9f750125e665 100644
--- a/drivers/mfd/sec-irq.c
+++ b/drivers/mfd/sec-irq.c
@@ -280,19 +280,19 @@ int sec_irq_init(struct sec_pmic_dev *sec_pmic)
 
 	switch (type) {
 	case S5M8763X:
-		ret = regmap_add_irq_chip(sec_pmic->regmap, sec_pmic->irq,
+		ret = regmap_add_irq_chip(sec_pmic->regmap_pmic, sec_pmic->irq,
 				  IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
 				  sec_pmic->irq_base, &s5m8763_irq_chip,
 				  &sec_pmic->irq_data);
 		break;
 	case S5M8767X:
-		ret = regmap_add_irq_chip(sec_pmic->regmap, sec_pmic->irq,
+		ret = regmap_add_irq_chip(sec_pmic->regmap_pmic, sec_pmic->irq,
 				  IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
 				  sec_pmic->irq_base, &s5m8767_irq_chip,
 				  &sec_pmic->irq_data);
 		break;
 	case S2MPS11X:
-		ret = regmap_add_irq_chip(sec_pmic->regmap, sec_pmic->irq,
+		ret = regmap_add_irq_chip(sec_pmic->regmap_pmic, sec_pmic->irq,
 				  IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
 				  sec_pmic->irq_base, &s2mps11_irq_chip,
 				  &sec_pmic->irq_data);
diff --git a/drivers/regulator/s5m8767.c b/drivers/regulator/s5m8767.c
index cbf91e25cf7ff2a632270caed53d05533fcf81db..aeb40aad0ae7775442f775403fdaea047bdd16d8 100644
--- a/drivers/regulator/s5m8767.c
+++ b/drivers/regulator/s5m8767.c
@@ -925,7 +925,7 @@ static int s5m8767_pmic_probe(struct platform_device *pdev)
 		config.dev = s5m8767->dev;
 		config.init_data = pdata->regulators[i].initdata;
 		config.driver_data = s5m8767;
-		config.regmap = iodev->regmap;
+		config.regmap = iodev->regmap_pmic;
 		config.of_node = pdata->regulators[i].reg_node;
 
 		rdev[i] = devm_regulator_register(&pdev->dev, &regulators[id],
diff --git a/drivers/rtc/rtc-s5m.c b/drivers/rtc/rtc-s5m.c
index 0ba56b7cb3823d61b88ae442f73841bd6b014d05..ae8119dc2846aac28c8f47019720bf93fd39803f 100644
--- a/drivers/rtc/rtc-s5m.c
+++ b/drivers/rtc/rtc-s5m.c
@@ -567,7 +567,7 @@ static int s5m_rtc_probe(struct platform_device *pdev)
 
 	info->dev = &pdev->dev;
 	info->s5m87xx = s5m87xx;
-	info->regmap = s5m87xx->regmap;
+	info->regmap = s5m87xx->regmap_rtc;
 	info->device_type = s5m87xx->device_type;
 	info->wtsr_smpl = s5m87xx->wtsr_smpl;
 
diff --git a/include/linux/mfd/samsung/core.h b/include/linux/mfd/samsung/core.h
index 2d0c9071bcfb795a4f34cdc44b1e88abae394c5e..cab2dd27907661e9c312e03088e398cc06c89a20 100644
--- a/include/linux/mfd/samsung/core.h
+++ b/include/linux/mfd/samsung/core.h
@@ -39,7 +39,8 @@ enum sec_device_type {
 struct sec_pmic_dev {
 	struct device *dev;
 	struct sec_platform_data *pdata;
-	struct regmap *regmap;
+	struct regmap *regmap_pmic;
+	struct regmap *regmap_rtc;
 	struct i2c_client *i2c;
 	struct i2c_client *rtc;