diff --git a/drivers/mfd/88pm88x.c b/drivers/mfd/88pm88x.c
new file mode 100644
index 000000000000..301e3e8f26f4
--- /dev/null
+++ b/drivers/mfd/88pm88x.c
@@ -0,0 +1,211 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include <linux/i2c.h>
+#include <linux/mfd/core.h>
+#include <linux/module.h>
+#include <linux/notifier.h>
+#include <linux/of.h>
+#include <linux/reboot.h>
+#include <linux/regmap.h>
+
+#include <linux/mfd/88pm88x.h>
+
+#define PM88X_REG_INT_STATUS1			0x05
+
+#define PM88X_REG_INT_ENA_1			0x0a
+#define PM88X_INT_ENA1_ONKEY			BIT(0)
+
+#define PM88X_REGMAP_CONF_REG_BITS		8
+#define PM88X_REGMAP_CONF_VAL_BITS		8
+#define PM88X_REGMAP_CONF_MAX_REG		0xfe
+
+enum pm88x_irq_number {
+	PM88X_IRQ_ONKEY,
+
+	PM88X_MAX_IRQ
+};
+
+static struct regmap_irq pm88x_regmap_irqs[] = {
+	REGMAP_IRQ_REG(PM88X_IRQ_ONKEY, 0, PM88X_INT_ENA1_ONKEY),
+};
+
+static struct regmap_irq_chip pm88x_regmap_irq_chip = {
+	.name = "88pm88x",
+	.irqs = pm88x_regmap_irqs,
+	.num_irqs = ARRAY_SIZE(pm88x_regmap_irqs),
+	.num_regs = 4,
+	.status_base = PM88X_REG_INT_STATUS1,
+	.ack_base = PM88X_REG_INT_STATUS1,
+	.unmask_base = PM88X_REG_INT_ENA_1,
+};
+
+static struct resource pm88x_onkey_resources[] = {
+	DEFINE_RES_IRQ_NAMED(PM88X_IRQ_ONKEY, "88pm88x-onkey"),
+};
+
+static struct mfd_cell pm886_devs[] = {
+	{
+		.name = "88pm88x-onkey",
+		.of_compatible = "marvell,88pm88x-onkey",
+		.num_resources = ARRAY_SIZE(pm88x_onkey_resources),
+		.resources = pm88x_onkey_resources,
+	},
+	{
+		.name = "88pm88x-regulator",
+		.id = PM88X_REGULATOR_ID_LDO2,
+	},
+	{
+		.name = "88pm88x-regulator",
+		.id = PM88X_REGULATOR_ID_LDO15,
+	},
+	{
+		.name = "88pm88x-regulator",
+		.id = PM886_REGULATOR_ID_BUCK2,
+	},
+};
+
+static const struct regmap_config pm88x_i2c_regmap = {
+	.reg_bits = PM88X_REGMAP_CONF_REG_BITS,
+	.val_bits = PM88X_REGMAP_CONF_VAL_BITS,
+	.max_register = PM88X_REGMAP_CONF_MAX_REG,
+};
+
+static int pm88x_power_off_handler(struct sys_off_data *sys_off_data)
+{
+	struct pm88x_chip *chip = sys_off_data->cb_data;
+	struct regmap *regmap = chip->regmaps[PM88X_REGMAP_BASE];
+	struct device *dev = &chip->client->dev;
+	int err;
+
+	err = regmap_update_bits(regmap, PM88X_REG_MISC_CONFIG1, PM88X_SW_PDOWN,
+				PM88X_SW_PDOWN);
+	if (err) {
+		dev_err(dev, "Failed to power off the device: %d\n", err);
+		return NOTIFY_BAD;
+	}
+	return NOTIFY_DONE;
+}
+
+static int pm88x_initialize_subregmaps(struct pm88x_chip *chip)
+{
+	struct device *dev = &chip->client->dev;
+	struct i2c_client *page;
+	struct regmap *regmap;
+	int err;
+
+	/* LDO page */
+	page = devm_i2c_new_dummy_device(dev, chip->client->adapter,
+				chip->client->addr + PM88X_PAGE_OFFSET_LDO);
+	if (IS_ERR(page)) {
+		err = PTR_ERR(page);
+		dev_err(dev, "Failed to initialize LDO client: %d\n", err);
+		return err;
+	}
+	regmap = devm_regmap_init_i2c(page, &pm88x_i2c_regmap);
+	if (IS_ERR(regmap)) {
+		err = PTR_ERR(regmap);
+		dev_err(dev, "Failed to initialize LDO regmap: %d\n", err);
+		return err;
+	}
+	chip->regmaps[PM88X_REGMAP_LDO] = regmap;
+
+	return 0;
+}
+
+static int pm88x_setup_irq(struct pm88x_chip *chip,
+		struct regmap_irq_chip_data **irq_data)
+{
+	struct regmap *regmap = chip->regmaps[PM88X_REGMAP_BASE];
+	struct device *dev = &chip->client->dev;
+	int err;
+
+	/* Set interrupt clearing mode to clear on write. */
+	err = regmap_update_bits(regmap, PM88X_REG_MISC_CONFIG2,
+			PM88X_INT_INV | PM88X_INT_CLEAR | PM88X_INT_MASK_MODE,
+			PM88X_INT_WC);
+	if (err) {
+		dev_err(dev, "Failed to set interrupt clearing mode: %d\n", err);
+		return err;
+	}
+
+	err = devm_regmap_add_irq_chip(dev, regmap, chip->client->irq,
+					IRQF_ONESHOT, -1, &pm88x_regmap_irq_chip,
+					irq_data);
+	if (err) {
+		dev_err(dev, "Failed to request IRQ: %d\n", err);
+		return err;
+	}
+
+	return 0;
+}
+
+static int pm88x_probe(struct i2c_client *client)
+{
+	struct regmap_irq_chip_data *irq_data;
+	struct device *dev = &client->dev;
+	struct pm88x_chip *chip;
+	struct regmap *regmap;
+	unsigned int chip_id;
+	int err;
+
+	chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
+	if (!chip)
+		return -ENOMEM;
+
+	chip->client = client;
+	chip->whoami = (uintptr_t)device_get_match_data(dev);
+	i2c_set_clientdata(client, chip);
+
+	regmap = devm_regmap_init_i2c(client, &pm88x_i2c_regmap);
+	if (IS_ERR(regmap)) {
+		err = PTR_ERR(regmap);
+		return dev_err_probe(dev, err, "Failed to initialize regmap\n");
+	}
+	chip->regmaps[PM88X_REGMAP_BASE] = regmap;
+
+	err = regmap_read(regmap, PM88X_REG_ID, &chip_id);
+	if (err)
+		return dev_err_probe(dev, err, "Failed to read chip ID\n");
+	if (chip->whoami != chip_id)
+		return dev_err_probe(dev, -EINVAL, "Device reported wrong chip ID: %u\n",
+					chip_id);
+
+	err = pm88x_initialize_subregmaps(chip);
+	if (err)
+		return err;
+
+	err = pm88x_setup_irq(chip, &irq_data);
+	if (err)
+		return err;
+
+	err = devm_mfd_add_devices(dev, 0, pm886_devs, ARRAY_SIZE(pm886_devs),
+				NULL, 0, regmap_irq_get_domain(irq_data));
+	if (err)
+		return dev_err_probe(dev, err, "Failed to add devices\n");
+
+	err = devm_register_power_off_handler(dev, pm88x_power_off_handler, chip);
+	if (err)
+		return dev_err_probe(dev, err, "Failed to register power off handler\n");
+
+	device_init_wakeup(dev, device_property_read_bool(dev, "wakeup-source"));
+
+	return 0;
+}
+
+const struct of_device_id pm88x_of_match[] = {
+	{ .compatible = "marvell,88pm886-a1", .data = (void *)PM886_A1_CHIP_ID },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, pm88x_of_match);
+
+static struct i2c_driver pm88x_i2c_driver = {
+	.driver = {
+		.name = "88pm88x",
+		.of_match_table = pm88x_of_match,
+	},
+	.probe = pm88x_probe,
+};
+module_i2c_driver(pm88x_i2c_driver);
+
+MODULE_DESCRIPTION("Marvell 88PM88X PMIC driver");
+MODULE_AUTHOR("Karel Balej <balejk@matfyz.cz>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index e7a6e45b9fac..93ae5280fc3f 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -794,6 +794,18 @@ config MFD_88PM860X
 	  select individual components like voltage regulators, RTC and
 	  battery-charger under the corresponding menus.
 
+config MFD_88PM88X_PMIC
+	bool "Marvell 88PM886 PMIC"
+	depends on I2C=y
+	depends on OF
+	select REGMAP_I2C
+	select REGMAP_IRQ
+	select MFD_CORE
+	help
+	  This enables support for Marvell 88PM886 Power Management IC.
+	  This includes the I2C driver and the core APIs _only_, you have to
+	  select individual components like onkey under the corresponding menus.
+
 config MFD_MAX14577
 	tristate "Maxim Semiconductor MAX14577/77836 MUIC + Charger Support"
 	depends on I2C
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index c66f07edcd0e..c4f95a28f589 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -7,6 +7,7 @@
 obj-$(CONFIG_MFD_88PM860X)	+= 88pm860x.o
 obj-$(CONFIG_MFD_88PM800)	+= 88pm800.o 88pm80x.o
 obj-$(CONFIG_MFD_88PM805)	+= 88pm805.o 88pm80x.o
+obj-$(CONFIG_MFD_88PM88X_PMIC)	+= 88pm88x.o
 obj-$(CONFIG_MFD_ACT8945A)	+= act8945a.o
 obj-$(CONFIG_MFD_SM501)		+= sm501.o
 obj-$(CONFIG_ARCH_BCM2835)	+= bcm2835-pm.o
diff --git a/include/linux/mfd/88pm88x.h b/include/linux/mfd/88pm88x.h
new file mode 100644
index 000000000000..f1eaaecc784e
--- /dev/null
+++ b/include/linux/mfd/88pm88x.h
@@ -0,0 +1,46 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef __MFD_88PM88X_H
+#define __MFD_88PM88X_H
+
+#include <linux/mfd/core.h>
+
+#define PM886_A1_CHIP_ID		0xa1
+
+#define PM88X_REG_ID			0x00
+
+#define PM88X_REG_STATUS1		0x01
+#define PM88X_ONKEY_STS1		BIT(0)
+
+#define PM88X_REG_MISC_CONFIG1		0x14
+#define PM88X_SW_PDOWN			BIT(5)
+
+#define PM88X_REG_MISC_CONFIG2		0x15
+#define PM88X_INT_INV			BIT(0)
+#define PM88X_INT_CLEAR			BIT(1)
+#define PM88X_INT_RC			0x00
+#define PM88X_INT_WC			BIT(1)
+#define PM88X_INT_MASK_MODE		BIT(2)
+
+#define PM88X_PAGE_OFFSET_LDO		1
+
+enum pm88x_regulator_id {
+	PM88X_REGULATOR_ID_LDO2,
+	PM88X_REGULATOR_ID_LDO15,
+	PM886_REGULATOR_ID_BUCK2,
+
+	PM88X_REGULATOR_ID_SENTINEL
+};
+
+enum pm88x_regmap_index {
+	PM88X_REGMAP_BASE,
+	PM88X_REGMAP_LDO,
+
+	PM88X_REGMAP_NR
+};
+
+struct pm88x_chip {
+	struct i2c_client *client;
+	unsigned int whoami;
+	struct regmap *regmaps[PM88X_REGMAP_NR];
+};
+#endif /* __MFD_88PM88X_H */
