diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 7bbaf5991268..99fd45ae2625 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -1033,6 +1033,13 @@ config REGULATOR_QCOM_USB_VBUS
 	  Say M here if you want to include support for enabling the VBUS output
 	  as a module. The module will be named "qcom_usb_vbus_regulator".
 
+config REGULATOR_RAA215300
+	tristate "Renesas RAA215300 driver"
+	select REGMAP_I2C
+	depends on I2C
+	help
+	  Support for the Renesas RAA215300 PMIC.
+
 config REGULATOR_RASPBERRYPI_TOUCHSCREEN_ATTINY
 	tristate "Raspberry Pi 7-inch touchscreen panel ATTINY regulator"
 	depends on BACKLIGHT_CLASS_DEVICE
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index 0b3ad1b0a999..1b885d6a050c 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -124,6 +124,7 @@ obj-$(CONFIG_REGULATOR_TPS51632) += tps51632-regulator.o
 obj-$(CONFIG_REGULATOR_PBIAS) += pbias-regulator.o
 obj-$(CONFIG_REGULATOR_PCAP) += pcap-regulator.o
 obj-$(CONFIG_REGULATOR_PCF50633) += pcf50633-regulator.o
+obj-$(CONFIG_REGULATOR_RAA215300)	+= raa215300.o
 obj-$(CONFIG_REGULATOR_RASPBERRYPI_TOUCHSCREEN_ATTINY)  += rpi-panel-attiny-regulator.o
 obj-$(CONFIG_REGULATOR_RC5T583)  += rc5t583-regulator.o
 obj-$(CONFIG_REGULATOR_RK808)   += rk808-regulator.o
diff --git a/drivers/regulator/raa215300.c b/drivers/regulator/raa215300.c
new file mode 100644
index 000000000000..cdbbbb63daec
--- /dev/null
+++ b/drivers/regulator/raa215300.c
@@ -0,0 +1,118 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Renesas RAA215300 PMIC driver
+ *
+ * Copyright (C) 2023 Renesas Electronics Corporation
+ */
+
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
+
+#define RAA215300_REG_BLOCK_EN	0x6c
+#define RAA215300_HW_REV	0xf8
+
+#define RAA215300_RTC_DEFAULT_ADDR 0x6f
+#define RAA215300_REG_BLOCK_EN_RTC_EN	BIT(6)
+
+static bool raa215300_is_volatile_reg(struct device *dev, unsigned int reg)
+{
+	return true;
+}
+
+static const struct regmap_config raa215300_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = 0xff,
+	.volatile_reg = raa215300_is_volatile_reg,
+	.cache_type = REGCACHE_FLAT,
+};
+
+static void raa215300_rtc_unregister_device(void *data)
+{
+	i2c_unregister_device(data);
+}
+
+static int raa215300_i2c_probe(struct i2c_client *client)
+{
+	struct device *dev = &client->dev;
+	unsigned int pmic_version;
+	bool int_osc_en = true;
+	struct regmap *regmap;
+	struct clk *clkin;
+	struct clk *xin;
+	int ret;
+
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
+		return -EOPNOTSUPP;
+
+	regmap = devm_regmap_init_i2c(client, &raa215300_regmap_config);
+	if (IS_ERR(regmap))
+		return dev_err_probe(dev, PTR_ERR(regmap),
+				     "regmap i2c init failed\n");
+
+	ret = regmap_read(regmap, RAA215300_HW_REV, &pmic_version);
+	if (ret < 0)
+		return dev_err_probe(dev, ret, "HW rev read failed\n");
+
+	dev_dbg(dev, "RAA215300 PMIC version 0x%04x\n", pmic_version);
+
+	xin = devm_clk_get_optional(&client->dev, "xin");
+	if (IS_ERR_OR_NULL(xin)) {
+		clkin = devm_clk_get(&client->dev, "clkin");
+		if (IS_ERR(clkin))
+			return PTR_ERR(clkin);
+
+		int_osc_en = false;
+		xin = NULL;
+	} else {
+		clkin = NULL;
+	}
+
+	if (xin || clkin)  {
+		struct i2c_client *rtc_client;
+
+		/* Enable RTC block */
+		regmap_update_bits(regmap, RAA215300_REG_BLOCK_EN,
+				   RAA215300_REG_BLOCK_EN_RTC_EN,
+				   RAA215300_REG_BLOCK_EN_RTC_EN);
+
+		rtc_client = i2c_new_ancillary_device(client, "rtc",
+						      RAA215300_RTC_DEFAULT_ADDR,
+						      pmic_version >= 0x12 ?
+						      "isl1208" : "raa215300_a0");
+		if (IS_ERR(rtc_client))
+			return PTR_ERR(rtc_client);
+
+		ret = devm_add_action_or_reset(dev,
+					       raa215300_rtc_unregister_device,
+					       rtc_client);
+		if (ret < 0)
+			return ret;
+	}
+
+	return 0;
+}
+
+static const struct of_device_id raa215300_dt_match[] = {
+	{ .compatible = "renesas,raa215300" },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, raa215300_dt_match);
+
+static struct i2c_driver raa215300_i2c_driver = {
+	.driver = {
+		.name = "raa215300",
+		.of_match_table = raa215300_dt_match,
+	},
+	.probe_new = raa215300_i2c_probe,
+};
+module_i2c_driver(raa215300_i2c_driver);
+
+MODULE_DESCRIPTION("Renesas RAA215300 PMIC driver");
+MODULE_AUTHOR("Fabrizio Castro <fabrizio.castro.jz@renesas.com>");
+MODULE_AUTHOR("Biju Das <biju.das.jz@bp.renesas.com>");
+MODULE_LICENSE("GPL");
