diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst
index 88dadea85cfc..0ec96abe3f7d 100644
--- a/Documentation/hwmon/index.rst
+++ b/Documentation/hwmon/index.rst
@@ -121,6 +121,7 @@ Hardware Monitoring Kernel Drivers
    ltc2947
    ltc2978
    ltc2990
+   ltc2991
    ltc3815
    ltc4151
    ltc4215
diff --git a/Documentation/hwmon/ltc2991.rst b/Documentation/hwmon/ltc2991.rst
new file mode 100644
index 000000000000..9ab29dd85012
--- /dev/null
+++ b/Documentation/hwmon/ltc2991.rst
@@ -0,0 +1,43 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+Kernel driver ltc2991
+=====================
+
+Supported chips:
+
+  * Analog Devices LTC2991
+
+    Prefix: 'ltc2991'
+
+    Addresses scanned: I2C 0x48 - 0x4f
+
+    Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/2991ff.pdf
+
+Authors:
+
+  - Antoniu Miclaus <antoniu.miclaus@analog.com>
+
+
+Description
+-----------
+
+This driver supports hardware monitoring for Analog Devices LTC2991 Octal I2C
+Voltage, Current and Temperature Monitor.
+
+The LTC2991 is used to monitor system temperatures, voltages and currents.
+Through the I2C serial interface, the eight monitors can individually measure
+supply voltages and can be paired for differential measurements of current sense
+resistors or temperature sensing transistors. Additional measurements include
+internal temperatureand internal VCC.
+
+
+sysfs-Interface
+-------------
+
+The following attributes are supported. Limits are read-only.
+
+=============== =================
+inX_input:      voltage input
+currX_input:    current input
+tempX_input:    temperature input
+=============== =================
diff --git a/MAINTAINERS b/MAINTAINERS
index 6c4cce45a09d..edfa49c42848 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -12449,6 +12449,14 @@ F:	drivers/hwmon/ltc2947-i2c.c
 F:	drivers/hwmon/ltc2947-spi.c
 F:	drivers/hwmon/ltc2947.h
 
+LTC2991 HARDWARE MONITOR DRIVER
+M:	Antoniu Miclaus <antoniu.miclaus@analog.com>
+L:	linux-hwmon@vger.kernel.org
+S:	Supported
+W:	https://ez.analog.com/linux-software-drivers
+F:	Documentation/devicetree/bindings/hwmon/adi,ltc2991.yaml
+F:	drivers/hwmon/ltc2991.c
+
 LTC2983 IIO TEMPERATURE DRIVER
 M:	Nuno Sá <nuno.sa@analog.com>
 L:	linux-iio@vger.kernel.org
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index ec38c8892158..818a67328fcd 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -932,6 +932,17 @@ config SENSORS_LTC2990
 	  This driver can also be built as a module. If so, the module will
 	  be called ltc2990.
 
+config SENSORS_LTC2991
+	tristate "Analog Devices LTC2991"
+	depends on I2C
+	help
+	  If you say yes here you get support for Analog Devices LTC2991
+	  Octal I2C Voltage, Current, and Temperature Monitor. The LTC2991
+	  supports a combination of voltage, current and temperature monitoring.
+
+	  This driver can also be built as a module. If so, the module will
+	  be called ltc2991.
+
 config SENSORS_LTC2992
 	tristate "Linear Technology LTC2992"
 	depends on I2C
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index 4ac9452b5430..f324d057535a 100644
--- a/drivers/hwmon/Makefile
+++ b/drivers/hwmon/Makefile
@@ -127,6 +127,7 @@ obj-$(CONFIG_SENSORS_LTC2947)	+= ltc2947-core.o
 obj-$(CONFIG_SENSORS_LTC2947_I2C) += ltc2947-i2c.o
 obj-$(CONFIG_SENSORS_LTC2947_SPI) += ltc2947-spi.o
 obj-$(CONFIG_SENSORS_LTC2990)	+= ltc2990.o
+obj-$(CONFIG_SENSORS_LTC2991)	+= ltc2991.o
 obj-$(CONFIG_SENSORS_LTC2992)	+= ltc2992.o
 obj-$(CONFIG_SENSORS_LTC4151)	+= ltc4151.o
 obj-$(CONFIG_SENSORS_LTC4215)	+= ltc4215.o
diff --git a/drivers/hwmon/ltc2991.c b/drivers/hwmon/ltc2991.c
new file mode 100644
index 000000000000..bd63c61129a9
--- /dev/null
+++ b/drivers/hwmon/ltc2991.c
@@ -0,0 +1,437 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2023 Analog Devices, Inc.
+ * Author: Antoniu Miclaus <antoniu.miclaus@analog.com>
+ */
+
+#include <linux/bitops.h>
+#include <linux/err.h>
+#include <linux/hwmon.h>
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+
+#define LTC2991_STATUS_LOW		0x00
+#define LTC2991_CH_EN_TRIGGER		0x01
+#define LTC2991_V1_V4_CTRL		0x06
+#define LTC2991_V5_V8_CTRL		0x07
+#define LTC2991_PWM_TH_LSB_T_INT	0x08
+#define LTC2991_PWM_TH_MSB		0x09
+#define LTC2991_CHANNEL_V_MSB(x)	(0x0A + ((x) * 2))
+#define LTC2991_CHANNEL_T_MSB(x)	(0x0A + ((x) * 4))
+#define LTC2991_CHANNEL_C_MSB(x)	(0x0C + ((x) * 4))
+#define LTC2991_T_INT_MSB		0x1A
+#define LTC2991_VCC_MSB			0x1C
+
+#define LTC2991_V7_V8_EN		BIT(7)
+#define LTC2991_V5_V6_EN		BIT(6)
+#define LTC2991_V3_V4_EN		BIT(5)
+#define LTC2991_V1_V2_EN		BIT(4)
+#define LTC2991_T_INT_VCC_EN		BIT(3)
+
+#define LTC2991_V3_V4_FILT_EN		BIT(7)
+#define LTC2991_V3_V4_TEMP_EN		BIT(5)
+#define LTC2991_V3_V4_DIFF_EN		BIT(4)
+#define LTC2991_V1_V2_FILT_EN		BIT(3)
+#define LTC2991_V1_V2_TEMP_EN		BIT(1)
+#define LTC2991_V1_V2_DIFF_EN		BIT(0)
+
+#define LTC2991_V7_V8_FILT_EN		BIT(7)
+#define LTC2991_V7_V8_TEMP_EN		BIT(5)
+#define LTC2991_V7_V8_DIFF_EN		BIT(4)
+#define LTC2991_V5_V6_FILT_EN		BIT(7)
+#define LTC2991_V5_V6_TEMP_EN		BIT(5)
+#define LTC2991_V5_V6_DIFF_EN		BIT(4)
+
+#define LTC2991_REPEAT_ACQ_EN		BIT(4)
+#define LTC2991_T_INT_FILT_EN		BIT(3)
+
+#define LTC2991_MAX_CHANNEL		4
+#define LTC2991_T_INT_CH_NR		4
+#define LTC2991_VCC_CH_NR		0
+
+struct ltc2991_state {
+	struct device		*dev;
+	struct regmap		*regmap;
+	u32			r_sense_uohm[LTC2991_MAX_CHANNEL];
+	bool			temp_en[LTC2991_MAX_CHANNEL];
+};
+
+static int ltc2991_read_reg(struct ltc2991_state *st, u8 addr, u8 reg_len,
+			    int *val)
+{
+	__be16 regvals;
+	int ret;
+
+	if (reg_len < 2)
+		return regmap_read(st->regmap, addr, val);
+
+	ret = regmap_bulk_read(st->regmap, addr, &regvals, reg_len);
+	if (ret)
+		return ret;
+
+	*val = be16_to_cpu(regvals);
+
+	return 0;
+}
+
+static int ltc2991_get_voltage(struct ltc2991_state *st, u32 reg, long *val)
+{
+	int reg_val, ret, offset = 0;
+
+	ret = ltc2991_read_reg(st, reg, 2, &reg_val);
+	if (ret)
+		return ret;
+
+	if (reg == LTC2991_VCC_MSB)
+		/* Vcc 2.5V offset */
+		offset = 2500;
+
+	/* Vx, 305.18uV/LSB */
+	*val = DIV_ROUND_CLOSEST(sign_extend32(reg_val, 14) * 30518,
+				 1000 * 100) + offset;
+
+	return 0;
+}
+
+static int ltc2991_read_in(struct device *dev, u32 attr, int channel, long *val)
+{
+	struct ltc2991_state *st = dev_get_drvdata(dev);
+	u32 reg;
+
+	switch (attr) {
+	case hwmon_in_input:
+		if (channel == LTC2991_VCC_CH_NR)
+			reg = LTC2991_VCC_MSB;
+		else
+			reg = LTC2991_CHANNEL_V_MSB(channel - 1);
+
+		return ltc2991_get_voltage(st, reg, val);
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+static int ltc2991_get_curr(struct ltc2991_state *st, u32 reg, int channel,
+			    long *val)
+{
+	int reg_val, ret;
+
+	ret = ltc2991_read_reg(st, reg, 2, &reg_val);
+	if (ret)
+		return ret;
+
+	/* Vx-Vy, 19.075uV/LSB */
+	*val = DIV_ROUND_CLOSEST(sign_extend32(reg_val, 14) * 19075,
+				 st->r_sense_uohm[channel]);
+
+	return 0;
+}
+
+static int ltc2991_read_curr(struct device *dev, u32 attr, int channel,
+			     long *val)
+{
+	struct ltc2991_state *st = dev_get_drvdata(dev);
+	u32 reg;
+
+	switch (attr) {
+	case hwmon_curr_input:
+		reg = LTC2991_CHANNEL_C_MSB(channel);
+		return ltc2991_get_curr(st, reg, channel, val);
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+static int ltc2991_get_temp(struct ltc2991_state *st, u32 reg, int channel,
+			    long *val)
+{
+	int reg_val, ret;
+
+	ret = ltc2991_read_reg(st, reg, 2, &reg_val);
+	if (ret)
+		return ret;
+
+	/* Temp LSB = 0.0625 Degrees */
+	*val = DIV_ROUND_CLOSEST(sign_extend32(reg_val, 12) * 1000, 16);
+
+	return 0;
+}
+
+static int ltc2991_read_temp(struct device *dev, u32 attr, int channel,
+			     long *val)
+{
+	struct ltc2991_state *st = dev_get_drvdata(dev);
+	u32 reg;
+
+	switch (attr) {
+	case hwmon_temp_input:
+		if (channel == LTC2991_T_INT_CH_NR)
+			reg = LTC2991_T_INT_MSB;
+		else
+			reg = LTC2991_CHANNEL_T_MSB(channel);
+
+		return ltc2991_get_temp(st, reg, channel, val);
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+static int ltc2991_read(struct device *dev, enum hwmon_sensor_types type,
+			u32 attr, int channel, long *val)
+{
+	switch (type) {
+	case hwmon_in:
+		return ltc2991_read_in(dev, attr, channel, val);
+	case hwmon_curr:
+		return ltc2991_read_curr(dev, attr, channel, val);
+	case hwmon_temp:
+		return ltc2991_read_temp(dev, attr, channel, val);
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+static umode_t ltc2991_is_visible(const void *data,
+				  enum hwmon_sensor_types type, u32 attr,
+				  int channel)
+{
+	const struct ltc2991_state *st = data;
+
+	switch (type) {
+	case hwmon_in:
+		switch (attr) {
+		case hwmon_in_input:
+			if (channel == LTC2991_VCC_CH_NR)
+				return 0444;
+			if (st->temp_en[(channel - 1) / 2])
+				break;
+			if (channel % 2)
+				return 0444;
+			if (!st->r_sense_uohm[(channel - 1) / 2])
+				return 0444;
+		}
+		break;
+	case hwmon_curr:
+		switch (attr) {
+		case hwmon_curr_input:
+			if (st->r_sense_uohm[channel])
+				return 0444;
+			break;
+		}
+		break;
+	case hwmon_temp:
+		switch (attr) {
+		case hwmon_temp_input:
+			if (st->temp_en[channel] ||
+			    channel == LTC2991_T_INT_CH_NR)
+				return 0444;
+			break;
+		}
+		break;
+	default:
+		break;
+	}
+
+	return 0;
+}
+
+static const struct hwmon_ops ltc2991_hwmon_ops = {
+	.is_visible = ltc2991_is_visible,
+	.read = ltc2991_read,
+};
+
+static const struct hwmon_channel_info *ltc2991_info[] = {
+	HWMON_CHANNEL_INFO(temp,
+			   HWMON_T_INPUT,
+			   HWMON_T_INPUT,
+			   HWMON_T_INPUT,
+			   HWMON_T_INPUT,
+			   HWMON_T_INPUT
+			   ),
+	HWMON_CHANNEL_INFO(curr,
+			   HWMON_C_INPUT,
+			   HWMON_C_INPUT,
+			   HWMON_C_INPUT,
+			   HWMON_C_INPUT
+			   ),
+	HWMON_CHANNEL_INFO(in,
+			   HWMON_I_INPUT,
+			   HWMON_I_INPUT,
+			   HWMON_I_INPUT,
+			   HWMON_I_INPUT,
+			   HWMON_I_INPUT,
+			   HWMON_I_INPUT,
+			   HWMON_I_INPUT,
+			   HWMON_I_INPUT,
+			   HWMON_I_INPUT
+			   ),
+	NULL
+};
+
+static const struct hwmon_chip_info ltc2991_chip_info = {
+	.ops = &ltc2991_hwmon_ops,
+	.info = ltc2991_info,
+};
+
+static const struct regmap_config ltc2991_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = 0x1D,
+};
+
+static int ltc2991_init(struct ltc2991_state *st)
+{
+	struct fwnode_handle *child;
+	int ret;
+	u32 val, addr;
+	u8 v5_v8_reg_data = 0, v1_v4_reg_data = 0;
+
+	ret = devm_regulator_get_enable(st->dev, "vcc");
+	if (ret)
+		return dev_err_probe(st->dev, ret,
+				     "failed to enable regulator\n");
+
+	device_for_each_child_node(st->dev, child) {
+		ret = fwnode_property_read_u32(child, "reg", &addr);
+		if (ret < 0) {
+			fwnode_handle_put(child);
+			return ret;
+		}
+
+		if (addr > 3) {
+			fwnode_handle_put(child);
+			return -EINVAL;
+		}
+
+		ret = fwnode_property_read_u32(child,
+					       "shunt-resistor-micro-ohms",
+					       &val);
+		if (!ret) {
+			if (!val)
+				return dev_err_probe(st->dev, -EINVAL,
+						     "shunt resistor value cannot be zero\n");
+
+			st->r_sense_uohm[addr] = val;
+
+			switch (addr) {
+			case 0:
+				v1_v4_reg_data |= LTC2991_V1_V2_DIFF_EN;
+				break;
+			case 1:
+				v1_v4_reg_data |= LTC2991_V3_V4_DIFF_EN;
+				break;
+			case 2:
+				v5_v8_reg_data |= LTC2991_V5_V6_DIFF_EN;
+				break;
+			case 3:
+				v5_v8_reg_data |= LTC2991_V7_V8_DIFF_EN;
+				break;
+			default:
+				break;
+			}
+		}
+
+		ret = fwnode_property_read_bool(child,
+						"adi,temperature-enable");
+		if (ret) {
+			st->temp_en[addr] = ret;
+
+			switch (addr) {
+			case 0:
+				v1_v4_reg_data |= LTC2991_V1_V2_TEMP_EN;
+				break;
+			case 1:
+				v1_v4_reg_data |= LTC2991_V3_V4_TEMP_EN;
+				break;
+			case 2:
+				v5_v8_reg_data |= LTC2991_V5_V6_TEMP_EN;
+				break;
+			case 3:
+				v5_v8_reg_data |= LTC2991_V7_V8_TEMP_EN;
+				break;
+			default:
+				break;
+			}
+		}
+	}
+
+	ret = regmap_write(st->regmap, LTC2991_V5_V8_CTRL, v5_v8_reg_data);
+	if (ret)
+		return dev_err_probe(st->dev, ret,
+				     "Error: Failed to set V5-V8 CTRL reg.\n");
+
+	ret = regmap_write(st->regmap, LTC2991_V1_V4_CTRL, v1_v4_reg_data);
+	if (ret)
+		return dev_err_probe(st->dev, ret,
+				     "Error: Failed to set V1-V4 CTRL reg.\n");
+
+	ret = regmap_write(st->regmap, LTC2991_PWM_TH_LSB_T_INT,
+			   LTC2991_REPEAT_ACQ_EN);
+	if (ret)
+		return dev_err_probe(st->dev, ret,
+				     "Error: Failed to set contiuous mode.\n");
+
+	/* Enable all channels and trigger conversions */
+	return regmap_write(st->regmap, LTC2991_CH_EN_TRIGGER,
+			    LTC2991_V7_V8_EN | LTC2991_V5_V6_EN |
+			    LTC2991_V3_V4_EN | LTC2991_V1_V2_EN |
+			    LTC2991_T_INT_VCC_EN);
+}
+
+static int ltc2991_i2c_probe(struct i2c_client *client)
+{
+	int ret;
+	struct device *hwmon_dev;
+	struct ltc2991_state *st;
+
+	st = devm_kzalloc(&client->dev, sizeof(*st), GFP_KERNEL);
+	if (!st)
+		return -ENOMEM;
+
+	st->dev = &client->dev;
+	st->regmap = devm_regmap_init_i2c(client, &ltc2991_regmap_config);
+	if (IS_ERR(st->regmap))
+		return PTR_ERR(st->regmap);
+
+	ret = ltc2991_init(st);
+	if (ret)
+		return ret;
+
+	hwmon_dev = devm_hwmon_device_register_with_info(&client->dev,
+							 client->name, st,
+							 &ltc2991_chip_info,
+							 NULL);
+
+	return PTR_ERR_OR_ZERO(hwmon_dev);
+}
+
+static const struct of_device_id ltc2991_of_match[] = {
+	{ .compatible = "adi,ltc2991" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, ltc2991_of_match);
+
+static const struct i2c_device_id ltc2991_i2c_id[] = {
+	{ "ltc2991", 0 },
+	{}
+};
+MODULE_DEVICE_TABLE(i2c, ltc2991_i2c_id);
+
+static struct i2c_driver ltc2991_i2c_driver = {
+	.driver = {
+		.name = "ltc2991",
+		.of_match_table = ltc2991_of_match,
+	},
+	.probe = ltc2991_i2c_probe,
+	.id_table = ltc2991_i2c_id,
+};
+
+module_i2c_driver(ltc2991_i2c_driver);
+
+MODULE_AUTHOR("Antoniu Miclaus <antoniu.miclaus@analog.com>");
+MODULE_DESCRIPTION("Analog Devices LTC2991 HWMON Driver");
+MODULE_LICENSE("GPL");
