From: Ashish Yadav <ashish.yadav@infineon.com>

Add the pmbus driver for Infineon XDP720 Digital eFuse Controller.

Signed-off-by: Ashish Yadav <ashish.yadav@infineon.com>
---
XDP720 Digital eFuse Controller provides accurate system telemetry
(V, I, P, T) and reports analog current at the IMON pin for post-processing.

The Current and Power measurement depends on the RIMON and GIMON values.
Please look into data sheet sections 5.4.2 and 5.4.4 for more details:
https://www.infineon.com/assets/row/public/documents/24/49/infineon-xdp720-001-datasheet-en.pdf

The GIMON (microA/A) depends on the 10th bit of TELEMETRY_AVG PMBUS Register.
The value of RIMON (kohm) can be provided by the user through device tree using
infineon,rimon-micro-ohms  property.
---
 drivers/hwmon/pmbus/Kconfig  |   9 +++
 drivers/hwmon/pmbus/Makefile |   1 +
 drivers/hwmon/pmbus/xdp720.c | 122 +++++++++++++++++++++++++++++++++++
 3 files changed, 132 insertions(+)
 create mode 100644 drivers/hwmon/pmbus/xdp720.c

diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig
index fc1273abe357..c8e53852d0c3 100644
--- a/drivers/hwmon/pmbus/Kconfig
+++ b/drivers/hwmon/pmbus/Kconfig
@@ -702,6 +702,15 @@ config SENSORS_XDP710
 	  This driver can also be built as a module. If so, the module will
 	  be called xdp710.
 
+config SENSORS_XDP720
+        tristate "Infineon XDP720 family"
+        help
+          If you say yes here you get hardware monitoring support for Infineon
+          XDP720.
+
+          This driver can also be built as a module. If so, the module will
+          be called xdp720.
+
 config SENSORS_XDPE152
 	tristate "Infineon XDPE152 family"
 	help
diff --git a/drivers/hwmon/pmbus/Makefile b/drivers/hwmon/pmbus/Makefile
index d6c86924f887..bb0a7526d5b3 100644
--- a/drivers/hwmon/pmbus/Makefile
+++ b/drivers/hwmon/pmbus/Makefile
@@ -68,6 +68,7 @@ obj-$(CONFIG_SENSORS_TPS546D24)	+= tps546d24.o
 obj-$(CONFIG_SENSORS_UCD9000)	+= ucd9000.o
 obj-$(CONFIG_SENSORS_UCD9200)	+= ucd9200.o
 obj-$(CONFIG_SENSORS_XDP710)	+= xdp710.o
+obj-$(CONFIG_SENSORS_XDP720)    += xdp720.o
 obj-$(CONFIG_SENSORS_XDPE122)	+= xdpe12284.o
 obj-$(CONFIG_SENSORS_XDPE152)	+= xdpe152c4.o
 obj-$(CONFIG_SENSORS_ZL6100)	+= zl6100.o
diff --git a/drivers/hwmon/pmbus/xdp720.c b/drivers/hwmon/pmbus/xdp720.c
new file mode 100644
index 000000000000..862de828198d
--- /dev/null
+++ b/drivers/hwmon/pmbus/xdp720.c
@@ -0,0 +1,122 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Hardware monitoring driver for Infineon XDP720 Digital eFuse Controller
+ *
+ * Copyright (c) 2026 Infineon Technologies. All rights reserved.
+ */
+
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/of_device.h>
+#include <linux/bitops.h>
+#include "pmbus.h"
+
+/*
+ * The IMON resistor required to generate the system overcurrent protection.
+ * Arbitrary default Rimon value: 2k Ohm
+ */
+#define XDP720_DEFAULT_RIMON 2000000000 /* 2k ohm */
+#define XDP720_TELEMETRY_AVG 0xE9
+
+static struct pmbus_driver_info xdp720_info = {
+	.pages = 1,
+	.format[PSC_VOLTAGE_IN] = direct,
+	.format[PSC_VOLTAGE_OUT] = direct,
+	.format[PSC_CURRENT_OUT] = direct,
+	.format[PSC_POWER] = direct,
+	.format[PSC_TEMPERATURE] = direct,
+
+	.m[PSC_VOLTAGE_IN] = 4653,
+	.b[PSC_VOLTAGE_IN] = 0,
+	.R[PSC_VOLTAGE_IN] = -2,
+	.m[PSC_VOLTAGE_OUT] = 4653,
+	.b[PSC_VOLTAGE_OUT] = 0,
+	.R[PSC_VOLTAGE_OUT] = -2,
+	/*
+	 * Current and Power measurement depends on the RIMON (kOhm) and
+	 * GIMON(microA/A) values.
+	 */
+	.m[PSC_CURRENT_OUT] = 24668,
+	.b[PSC_CURRENT_OUT] = 0,
+	.R[PSC_CURRENT_OUT] = -4,
+	.m[PSC_POWER] = 4486,
+	.b[PSC_POWER] = 0,
+	.R[PSC_POWER] = -1,
+	.m[PSC_TEMPERATURE] = 54,
+	.b[PSC_TEMPERATURE] = 22521,
+	.R[PSC_TEMPERATURE] = -1,
+
+	.func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_PIN |
+		   PMBUS_HAVE_TEMP | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_INPUT |
+		   PMBUS_HAVE_STATUS_TEMP,
+};
+
+static int xdp720_probe(struct i2c_client *client)
+{
+	struct pmbus_driver_info *info;
+	int ret;
+	u32 rimon;
+	int gimon;
+
+	info = devm_kmemdup(&client->dev, &xdp720_info, sizeof(*info),
+			    GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+
+	ret = i2c_smbus_read_word_data(client, XDP720_TELEMETRY_AVG);
+	if (ret < 0) {
+		dev_err(&client->dev, "Can't get TELEMETRY_AVG\n");
+		return ret;
+	}
+
+	ret >>= 10; /* 10th bit of TELEMETRY_AVG REG for GIMON Value */
+	ret &= GENMASK(0, 0);
+	if (ret == 1)
+		gimon = 18200; /* output gain 18.2 microA/A */
+	else
+		gimon = 9100; /* output gain 9.1 microA/A */
+
+	if (of_property_read_u32(client->dev.of_node,
+				 "infineon,rimon-micro-ohms", &rimon))
+		rimon = XDP720_DEFAULT_RIMON; /* Default if not set via DT */
+	if (rimon == 0)
+		return -EINVAL;
+
+	/* Adapt the current and power scale for each instance */
+	info->m[PSC_CURRENT_OUT] = DIV_ROUND_CLOSEST_ULL((u64)
+		info->m[PSC_CURRENT_OUT] * rimon * gimon, 1000000000000);
+	info->m[PSC_POWER] = DIV_ROUND_CLOSEST_ULL((u64)
+		info->m[PSC_POWER] * rimon * gimon, 1000000000000);
+
+	return pmbus_do_probe(client, info);
+}
+
+static const struct of_device_id xdp720_of_match[] = {
+	{ .compatible = "infineon,xdp720" },
+	{}
+};
+
+static const struct i2c_device_id xdp720_id[] = {
+	{ "xdp720" },
+	{}
+};
+
+MODULE_DEVICE_TABLE(i2c, xdp720_id);
+
+static struct i2c_driver xdp720_driver = {
+	.driver = {
+		   .name = "xdp720",
+		   .of_match_table = xdp720_of_match,
+	},
+	.probe = xdp720_probe,
+	.id_table = xdp720_id,
+};
+
+module_i2c_driver(xdp720_driver);
+
+MODULE_AUTHOR("Ashish Yadav <ashish.yadav@infineon.com>");
+MODULE_DESCRIPTION("PMBus driver for Infineon Digital eFuse Controller");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS("PMBUS");
-- 
2.39.5