diff --git a/Documentation/hwmon/mp2891.rst b/Documentation/hwmon/mp2891.rst
new file mode 100644
index 000000000..eaf73fe60
--- /dev/null
+++ b/Documentation/hwmon/mp2891.rst
@@ -0,0 +1,95 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+Kernel driver mp2891
+====================
+
+Supported chips:
+
+  * MPS mp2891
+
+    Prefix: 'mp2891'
+
+  * Datasheet
+
+    Publicly available at the MPS website : https://www.monolithicpower.com/en/mp2891.html
+
+Author:
+
+	Noah Wang <noahwang.wang@outlook.com>
+
+Description
+-----------
+
+This driver implements support for Monolithic Power Systems, Inc. (MPS)
+MP2891 Multi-phase Digital VR Controller.
+
+Device compliant with:
+
+- PMBus rev 1.3 interface.
+
+Device supports direct and linear format for reading input voltage,
+output voltage, input currect, output current, input power, output
+power, and temperature.
+
+The driver exports the following attributes via the 'sysfs' files
+for input voltage:
+
+**in1_input**
+
+**in1_label**
+
+The driver provides the following attributes for output voltage:
+
+**in2_input**
+
+**in2_label**
+
+**in3_input**
+
+**in3_label**
+
+The driver provides the following attributes for input current:
+
+**curr1_input**
+
+**curr1_label**
+
+**curr2_input**
+
+**curr2_label**
+
+The driver provides the following attributes for output current:
+
+**curr3_input**
+
+**curr3_label**
+
+**curr4_input**
+
+**curr4_label**
+
+The driver provides the following attributes for input power:
+
+**power1_input**
+
+**power1_label**
+
+**power2_input**
+
+**power2_label**
+
+The driver provides the following attributes for output power:
+
+**power3_input**
+
+**power3_label**
+
+**power4_input**
+
+**power4_label**
+
+The driver provides the following attributes for temperature:
+
+**temp1_input**
+
+**temp2_input**
diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig
index 557ae0c41..b8b6c7724 100644
--- a/drivers/hwmon/pmbus/Kconfig
+++ b/drivers/hwmon/pmbus/Kconfig
@@ -361,6 +361,15 @@ config SENSORS_MP5990
 	  This driver can also be built as a module. If so, the module will
 	  be called mp5990.

+config SENSORS_MP2891
+    tristate "MPS MP2891"
+    help
+      If you say yes here you get hardware monitoring support for MPS
+      MP2891 Dual Loop Digital Multi-Phase Controller.
+
+      This driver can also be built as a module. If so, the module will
+      be called mp2891.
+
 config SENSORS_MPQ7932_REGULATOR
 	bool "Regulator support for MPQ7932"
 	depends on SENSORS_MPQ7932 && REGULATOR
diff --git a/drivers/hwmon/pmbus/Makefile b/drivers/hwmon/pmbus/Makefile
index f14ecf03a..57b91c20e 100644
--- a/drivers/hwmon/pmbus/Makefile
+++ b/drivers/hwmon/pmbus/Makefile
@@ -38,6 +38,7 @@ obj-$(CONFIG_SENSORS_MP2888)	+= mp2888.o
 obj-$(CONFIG_SENSORS_MP2975)	+= mp2975.o
 obj-$(CONFIG_SENSORS_MP5023)	+= mp5023.o
 obj-$(CONFIG_SENSORS_MP5990)	+= mp5990.o
+obj-$(CONFIG_SENSORS_MP2891)   += mp2891.o
 obj-$(CONFIG_SENSORS_MPQ7932)	+= mpq7932.o
 obj-$(CONFIG_SENSORS_MPQ8785)	+= mpq8785.o
 obj-$(CONFIG_SENSORS_PLI1209BC)	+= pli1209bc.o
diff --git a/drivers/hwmon/pmbus/mp2891.c b/drivers/hwmon/pmbus/mp2891.c
new file mode 100644
index 000000000..c98d9ec6b
--- /dev/null
+++ b/drivers/hwmon/pmbus/mp2891.c
@@ -0,0 +1,210 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Hardware monitoring driver for MPS Multi-phase Digital VR Controllers(MP2891)
+ */
+
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include "pmbus.h"
+
+/* Vendor specific registers, the register READ_PIN_EST(0x94),
+ * MFR_VOUT_LOOP_CTRL(0xBD) and READ_IIN_EST(0x95) redefine
+ * the standard PMBUS register.
+ */
+#define MFR_VOUT_LOOP_CTRL      0xBD
+#define READ_PIN_EST            0x94
+#define READ_IIN_EST            0x95
+
+#define MP2891_PAGE_NUM			2
+
+#define MP2891_RAIL1_FUNC	(PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | \
+							PMBUS_HAVE_IOUT | PMBUS_HAVE_TEMP | \
+							PMBUS_HAVE_POUT | PMBUS_HAVE_PIN | \
+							PMBUS_HAVE_IIN | PMBUS_PHASE_VIRTUAL)
+
+#define MP2891_RAIL2_FUNC	(PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT | \
+							PMBUS_HAVE_TEMP | PMBUS_HAVE_POUT | \
+							PMBUS_HAVE_IIN | PMBUS_PHASE_VIRTUAL)
+
+struct mp2891_data {
+	struct pmbus_driver_info info;
+};
+
+#define to_mp2891_data(x) container_of(x, struct mp2891_data, info)
+
+static int mp2891_read_byte_data(struct i2c_client *client, int page, int reg)
+{
+	int ret;
+
+	switch (reg) {
+	case PMBUS_VOUT_MODE:
+		ret = PB_VOUT_MODE_DIRECT;
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	return ret;
+}
+
+static int mp2891_read_word_data(struct i2c_client *client, int page, int phase,
+			      int reg)
+{
+	int ret;
+
+	switch (reg) {
+	case PMBUS_READ_VIN:
+	case PMBUS_READ_IOUT:
+	case PMBUS_READ_POUT:
+	case PMBUS_READ_VOUT:
+	case PMBUS_READ_TEMPERATURE_1:
+		ret = pmbus_read_word_data(client, page, phase, reg);
+		break;
+	case PMBUS_READ_IIN:
+		ret = pmbus_read_word_data(client, page, phase, READ_IIN_EST);
+		break;
+	case PMBUS_READ_PIN:
+		ret = pmbus_read_word_data(client, page, phase, READ_PIN_EST);
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	return ret;
+}
+
+static int
+mp2891_identify_vout_scale(struct i2c_client *client, struct mp2891_data *data,
+							u32 reg, int page)
+{
+	int ret;
+
+	ret = i2c_smbus_write_byte_data(client, PMBUS_PAGE, page);
+	if (ret < 0)
+		return ret;
+
+	ret = i2c_smbus_read_word_data(client, reg);
+	if (ret < 0)
+		return ret;
+
+	/*
+	 * Obtain vout scale from the register MFR_VOUT_LOOP_CTRL, bits 15-14,bit 13.
+	 * If MFR_VOUT_LOOP_CTRL[13] = 1, the vout scale is below:
+	 * 2.5mV/LSB
+	 * If MFR_VOUT_LOOP_CTRL[13] = 0, the vout scale is decided by
+	 * MFR_VOUT_LOOP_CTRL[15:14]:
+	 * 00b - 6.25mV/LSB, 01b - 5mV/LSB, 10b - 2mV/LSB, 11b - 1mV
+	 */
+	if (ret & GENMASK(13, 13)) {
+		data->info.m[PSC_VOLTAGE_OUT] = 4;
+		data->info.R[PSC_VOLTAGE_OUT] = -1;
+		data->info.b[PSC_VOLTAGE_OUT] = 0;
+	} else {
+		ret = (ret & GENMASK(15, 14)) >> 14;
+		if (ret == 0) {
+			data->info.m[PSC_VOLTAGE_OUT] = 16;
+			data->info.R[PSC_VOLTAGE_OUT] = -2;
+			data->info.b[PSC_VOLTAGE_OUT] = 0;
+		} else if (ret == 1) {
+			data->info.m[PSC_VOLTAGE_OUT] = 2;
+			data->info.R[PSC_VOLTAGE_OUT] = -1;
+			data->info.b[PSC_VOLTAGE_OUT] = 0;
+		} else if (ret == 2) {
+			data->info.m[PSC_VOLTAGE_OUT] = 5;
+			data->info.R[PSC_VOLTAGE_OUT] = -1;
+			data->info.b[PSC_VOLTAGE_OUT] = 0;
+		} else {
+			data->info.m[PSC_VOLTAGE_OUT] = 1;
+			data->info.R[PSC_VOLTAGE_OUT] = 0;
+			data->info.b[PSC_VOLTAGE_OUT] = 0;
+		}
+	}
+
+	return 0;
+}
+
+static int
+mp2891_identify_rails_vout_scale(struct i2c_client *client, struct mp2891_data *data)
+{
+	int ret;
+
+	/* Identify vout scale from register  MFR_VOUT_LOOP_CTRL. */
+	/* Identify vout scale for rail 1. */
+	ret = mp2891_identify_vout_scale(client, data, MFR_VOUT_LOOP_CTRL, 0);
+	if (ret < 0)
+		return ret;
+
+	/* Identify vout scale for rail 2. */
+	ret = mp2891_identify_vout_scale(client, data, MFR_VOUT_LOOP_CTRL, 1);
+
+	return ret;
+}
+
+static struct pmbus_driver_info mp2891_info = {
+	.pages = MP2891_PAGE_NUM,
+	.format[PSC_VOLTAGE_IN] = linear,
+	.format[PSC_CURRENT_IN] = linear,
+	.format[PSC_CURRENT_OUT] = linear,
+	.format[PSC_TEMPERATURE] = linear,
+	.format[PSC_POWER] = linear,
+	.format[PSC_VOLTAGE_OUT] = direct,
+
+	.func[0] = MP2891_RAIL1_FUNC,
+	.func[1] = MP2891_RAIL2_FUNC,
+	.read_word_data = mp2891_read_word_data,
+	.read_byte_data = mp2891_read_byte_data,
+};
+
+static int mp2891_probe(struct i2c_client *client)
+{
+	struct pmbus_driver_info *info;
+	struct mp2891_data *data;
+	int ret;
+
+	data = devm_kzalloc(&client->dev, sizeof(struct mp2891_data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	memcpy(&data->info, &mp2891_info, sizeof(*info));
+	info = &data->info;
+
+	/* Identify vout scale per rail. */
+	ret = mp2891_identify_rails_vout_scale(client, data);
+	if (ret < 0)
+		return ret;
+
+	return pmbus_do_probe(client, info);
+}
+
+static const struct i2c_device_id mp2891_id[] = {
+	{"mp2891", 0},
+	{}
+};
+MODULE_DEVICE_TABLE(i2c, mp2891_id);
+
+static const struct of_device_id __maybe_unused mp2891_of_match[] = {
+	{.compatible = "mps,mp2891"},
+	{}
+};
+MODULE_DEVICE_TABLE(of, mp2891_of_match);
+
+static struct i2c_driver mp2891_driver = {
+	.driver = {
+		.name = "mp2891",
+		.of_match_table = mp2891_of_match,
+	},
+	.probe = mp2891_probe,
+	.id_table = mp2891_id,
+};
+
+module_i2c_driver(mp2891_driver);
+
+MODULE_AUTHOR("Noah Wang <noahwang.wang@outlook.com>");
+MODULE_DESCRIPTION("PMBus driver for MPS MP2891 device");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS(PMBUS);
