[PATCH v3 0/2] Add support for Infineon eFuse xdp730

[PATCH v3 0/2] Add support for Infineon eFuse xdp730

[ASHISH YADAV]

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

Hi,

These patches add support for the Infineon XDP730 Digital eFuse Controller
by updating the existing XDP720 driver.

The XDP720 and XDP730 are PMBus-compliant digital eFuse controllers
with an integrated current sensor.They provide accurate system
telemetry (V, I, P, T) and report analog current at the IMON pin for
post-processing.

Both parts share the same PMBus register map and direct-format
coefficients; they differ in the GIMON gain step exposed via the
TELEMETRY_AVG register (bit 10) and in the VDD_VIN pin number
(XDP720: pin 9, XDP730: pin 20).

The Current and Power measurement depends on the RIMON and GIMON values.
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.

Datasheets:
 - XDP720: https://www.infineon.com/assets/row/public/documents/24/49/infineon-xdp720-001-datasheet-en.pdf
 - XDP730: https://www.infineon.com/assets/row/public/documents/24/49/infineon-xdp730-001-datasheet-en.pdf

With Best Regards,
 Ashish Yadav
---
Changes in v3:
- Link to v2:
https://lore.kernel.org/all/20260529054218.5184-1-Ashish.Yadav@infineon.com/
- Revert back the DT info file name to infineon,xdp720.yaml and added
  xdp730 info
https://lore.kernel.org/all/20260529-partake-myself-baa76ed4e279@spud/
- Revert back the driver file name to xdp720.c and added xdp730 support
https://lore.kernel.org/all/20260529062937.646091F00893@smtp.kernel.org/

Changes in v2:
- Link to v1:
https://lore.kernel.org/all/20260519075558.91466-1-Ashish.Yadav@infineon.com/
- Integrated XDP720/XDP730 drivers into one driver.
https://lore.kernel.org/all/51133193-57fb-4a22-bf9e-9817f1f52ad5@roeck-us.net/



Ashish Yadav (2):
  dt-bindings: hwmon/pmbus: Add Infineon xdp730
  hwmon:(pmbus/xdp720) Add support for efuse xdp730

 .../bindings/hwmon/pmbus/infineon,xdp720.yaml |  41 +++--
 drivers/hwmon/pmbus/Kconfig                   |   2 +-
 drivers/hwmon/pmbus/xdp720.c                  | 167 +++++++++++-------
 3 files changed, 131 insertions(+), 79 deletions(-)

-- 
2.39.5

[PATCH v3 1/2] dt-bindings: hwmon/pmbus: Add Infineon xdp730

[ASHISH YADAV]

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

Add documentation for the device tree binding of the XDP730 eFuse.

Signed-off-by: Ashish Yadav <ashish.yadav@infineon.com>
---
 .../bindings/hwmon/pmbus/infineon,xdp720.yaml | 41 ++++++++++++++-----
 1 file changed, 31 insertions(+), 10 deletions(-)

diff --git a/Documentation/devicetree/bindings/hwmon/pmbus/infineon,xdp720.yaml b/Documentation/devicetree/bindings/hwmon/pmbus/infineon,xdp720.yaml
index 72bc3a5e7139..27ec00a8a41d 100644
--- a/Documentation/devicetree/bindings/hwmon/pmbus/infineon,xdp720.yaml
+++ b/Documentation/devicetree/bindings/hwmon/pmbus/infineon,xdp720.yaml
@@ -5,23 +5,31 @@
 $id: http://devicetree.org/schemas/hwmon/pmbus/infineon,xdp720.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#
 
-title: Infineon XDP720 Digital eFuse Controller
+title: Infineon XDP720 / XDP730 Digital eFuse Controllers
 
 maintainers:
   - Ashish Yadav <ashish.yadav@infineon.com>
 
 description: |
-  The XDP720 is an eFuse with integrated current sensor and digital
-  controller. It provides accurate system telemetry (V, I, P, T) and
-  reports analog current at the IMON pin for post-processing.
+  The XDP720 and XDP730 are PMBus-compliant digital eFuse controllers
+  with an integrated current sensor.  They provide accurate system
+  telemetry (V, I, P, T) and report analog current at the IMON pin for
+  post-processing.
 
-  Datasheet:
-     https://www.infineon.com/assets/row/public/documents/24/49/infineon-xdp720-001-datasheet-en.pdf
+  Both parts share the same PMBus register map and direct-format
+  coefficients; they differ in the GIMON gain step exposed via the
+  TELEMETRY_AVG register (bit 10) and in the VDD_VIN pin number
+  (XDP720: pin 9, XDP730: pin 20).
+
+  Datasheets:
+    - XDP720: https://www.infineon.com/assets/row/public/documents/24/49/infineon-xdp720-001-datasheet-en.pdf
+    - XDP730: https://www.infineon.com/assets/row/public/documents/24/49/infineon-xdp730-001-datasheet-en.pdf
 
 properties:
   compatible:
     enum:
       - infineon,xdp720
+      - infineon,xdp730
 
   reg:
     maxItems: 1
@@ -33,9 +41,9 @@ properties:
 
   vdd-vin-supply:
     description:
-      Supply for the VDD_VIN pin (pin 9), the IC controller power supply.
-      Typically connected to the input bus (VIN) through a 100 ohm / 100 nF
-      RC filter.
+      Supply for the VDD_VIN pin (XDP720 pin 9, XDP730 pin 20), the IC
+      controller power supply.  Typically connected to the input bus
+      (VIN) through a 100 ohm / 100 nF RC filter.
 
 required:
   - compatible
@@ -50,10 +58,23 @@ examples:
         #address-cells = <1>;
         #size-cells = <0>;
 
-        hwmon@11 {
+        efuse@11 {
             compatible = "infineon,xdp720";
             reg = <0x11>;
             vdd-vin-supply = <&vdd_vin>;
             infineon,rimon-micro-ohms = <1098000000>;  /* 1.098k ohm */
         };
     };
+
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        efuse@12 {
+            compatible = "infineon,xdp730";
+            reg = <0x12>;
+            vdd-vin-supply = <&vdd_vin>;
+            infineon,rimon-micro-ohms = <1098000000>;  /* 1.098k ohm */
+        };
+    };
-- 
2.39.5

[PATCH v3 2/2] hwmon:(pmbus/xdp720) Add support for efuse xdp730

[ASHISH YADAV]

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

Adds support for the Infineon XDP730 Digital eFuse Controller by
updating the existing XDP720 driver.

Signed-off-by: Ashish Yadav <ashish.yadav@infineon.com>
---
XDP720/XDP730 Digital eFuse Controllers provides accurate system telemetry
(V, I, P, T) and reports analog current at the IMON pin for post-processing.

Both parts share the same PMBus register map and direct-format
coefficients; they differ in the GIMON gain step exposed via the
TELEMETRY_AVG register (bit 10) and in the VDD_VIN pin number
(XDP720: pin 9, XDP730: pin 20).

The Current and Power measurement depends on the RIMON and GIMON values.
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  |   2 +-
 drivers/hwmon/pmbus/xdp720.c | 167 +++++++++++++++++++++--------------
 2 files changed, 100 insertions(+), 69 deletions(-)

diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig
index 8f4bff375ecb..a9e86d92b044 100644
--- a/drivers/hwmon/pmbus/Kconfig
+++ b/drivers/hwmon/pmbus/Kconfig
@@ -715,7 +715,7 @@ config SENSORS_XDP720
 	tristate "Infineon XDP720 family"
 	help
 	  If you say yes here you get hardware monitoring support for Infineon
-	  XDP720.
+	  XDP720 and XDP730 Digital eFuse Controllers.
 
 	  This driver can also be built as a module. If so, the module will
 	  be called xdp720.
diff --git a/drivers/hwmon/pmbus/xdp720.c b/drivers/hwmon/pmbus/xdp720.c
index 8729a771f216..1a5eab09f2fd 100644
--- a/drivers/hwmon/pmbus/xdp720.c
+++ b/drivers/hwmon/pmbus/xdp720.c
@@ -1,128 +1,159 @@
 // SPDX-License-Identifier: GPL-2.0+
 /*
- * Hardware monitoring driver for Infineon XDP720 Digital eFuse Controller
+ * Hardware monitoring driver for Infineon XDP720 / XDP730 Digital
+ * eFuse Controllers.
+ *
+ * Both parts share the same PMBus register map and direct-format
+ * coefficients; they differ in the GIMON gain step exposed via
+ * the TELEMETRY_AVG register and in the VDD_VIN pin number.
  *
  * Copyright (c) 2026 Infineon Technologies. All rights reserved.
  */
 
+#include <linux/bitops.h>
 #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 <linux/math64.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/property.h>
+#include <linux/regulator/consumer.h>
 #include "pmbus.h"
 
 /*
- * The IMON resistor required to generate the system overcurrent protection.
- * Arbitrary default Rimon value: 2k Ohm
+ * The IMON resistor required to generate the system overcurrent
+ * protection.  Arbitrary default Rimon value: 2 kOhm (in micro-ohms).
  */
-#define XDP720_DEFAULT_RIMON 2000000000 /* 2k ohm */
-#define XDP720_TELEMETRY_AVG 0xE9
+#define XDP720_DEFAULT_RIMON		2000000000U	/* 2 kohm */
+#define XDP720_TELEMETRY_AVG		0xE9
+#define XDP720_TELEMETRY_AVG_GIMON	BIT(10)		/* high/low GIMON select */
+
+/* Chip identifiers carried in OF match-data and i2c_device_id->driver_data. */
+enum xdp720_chip_id {
+	CHIP_XDP720 = 0,
+	CHIP_XDP730,
+};
 
-static struct pmbus_driver_info xdp720_info = {
+struct xdp720_data {
+	enum xdp720_chip_id	 id;
+	struct pmbus_driver_info info;
+};
+
+static const 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,
+	.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.
+	 * Current and Power measurement depend on the RIMON (micro-ohm)
+	 * and GIMON (microA/A) values; scaled per-instance in probe().
 	 */
-	.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,
+	.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,
+		   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;
+	struct xdp720_data *data;
 	int ret;
-	u32 rimon;
 	int gimon;
+	u32 rimon;
 
-	info = devm_kmemdup(&client->dev, &xdp720_info, sizeof(*info),
-			    GFP_KERNEL);
-	if (!info)
+	data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
+	if (!data)
 		return -ENOMEM;
 
+	data->id = (enum xdp720_chip_id)(uintptr_t)i2c_get_match_data(client);
+	data->info = xdp720_info;
+
 	ret = devm_regulator_get_enable(&client->dev, "vdd-vin");
 	if (ret)
 		return dev_err_probe(&client->dev, ret,
-			"failed to enable vdd-vin supply\n");
+				     "failed to enable vdd-vin supply\n");
 
 	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;
+	if (ret < 0)
+		return dev_err_probe(&client->dev, ret,
+				     "failed to read TELEMETRY_AVG\n");
+
+	/* Bit 10 of TELEMETRY_AVG selects the GIMON gain step in microA/A */
+	switch (data->id) {
+	case CHIP_XDP720:
+		gimon = (ret & XDP720_TELEMETRY_AVG_GIMON) ? 18200 : 9100;
+		dev_info(&client->dev, "Initialised XDP720 instance\n");
+		break;
+	case CHIP_XDP730:
+		gimon = (ret & XDP720_TELEMETRY_AVG_GIMON) ? 20000 : 10000;
+		dev_info(&client->dev, "Initialised XDP730 instance\n");
+		break;
+	default:
+		return -EINVAL;
 	}
 
-	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 (device_property_read_u32(&client->dev,
+				     "infineon,rimon-micro-ohms", &rimon))
+		rimon = XDP720_DEFAULT_RIMON;	/* Default if not in FW */
 	if (rimon == 0)
 		return -EINVAL;
 
-	/* Adapt the current and power scale for each instance */
-	info->m[PSC_CURRENT_OUT] = DIV64_U64_ROUND_CLOSEST((u64)
-		info->m[PSC_CURRENT_OUT] * rimon * gimon, 1000000000000ULL);
-	info->m[PSC_POWER] = DIV64_U64_ROUND_CLOSEST((u64)
-		info->m[PSC_POWER] * rimon * gimon, 1000000000000000ULL);
+	/* Adapt the current and power scale for each instance. */
+	data->info.m[PSC_CURRENT_OUT] = DIV64_U64_ROUND_CLOSEST((u64)
+		data->info.m[PSC_CURRENT_OUT] * rimon * gimon,
+		1000000000000ULL);
+	data->info.m[PSC_POWER] = DIV64_U64_ROUND_CLOSEST((u64)
+		data->info.m[PSC_POWER] * rimon * gimon,
+		1000000000000000ULL);
 
-	return pmbus_do_probe(client, info);
+	return pmbus_do_probe(client, &data->info);
 }
 
 static const struct of_device_id xdp720_of_match[] = {
-	{ .compatible = "infineon,xdp720" },
-	{}
+	{ .compatible = "infineon,xdp720", .data = (void *)CHIP_XDP720 },
+	{ .compatible = "infineon,xdp730", .data = (void *)CHIP_XDP730 },
+	{ }
 };
 MODULE_DEVICE_TABLE(of, xdp720_of_match);
 
 static const struct i2c_device_id xdp720_id[] = {
-	{ "xdp720" },
-	{}
+	{ "xdp720", CHIP_XDP720 },
+	{ "xdp730", CHIP_XDP730 },
+	{ }
 };
 MODULE_DEVICE_TABLE(i2c, xdp720_id);
 
 static struct i2c_driver xdp720_driver = {
 	.driver = {
-		   .name = "xdp720",
-		   .of_match_table = xdp720_of_match,
+		.name		= "xdp720",
+		.of_match_table	= xdp720_of_match,
 	},
-	.probe = xdp720_probe,
-	.id_table = xdp720_id,
+	.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 XDP720 Digital eFuse Controller");
+MODULE_DESCRIPTION("PMBus driver for Infineon XDP720/XDP730 Digital eFuse Controllers");
 MODULE_LICENSE("GPL");
 MODULE_IMPORT_NS("PMBUS");
-- 
2.39.5

Re: [PATCH v3 1/2] dt-bindings: hwmon/pmbus: Add Infineon xdp730

[sashiko-bot]

> From: Ashish Yadav <ashish.yadav@infineon.com>
> 
> Add documentation for the device tree binding of the XDP730 eFuse.
> 
> Signed-off-by: Ashish Yadav <ashish.yadav@infineon.com>

Sashiko has reviewed this patch and found no issues. It looks great!

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260601090925.3781-1-Ashish.Yadav@infineon.com?part=1

Re: [PATCH v3 2/2] hwmon:(pmbus/xdp720) Add support for efuse xdp730

[sashiko-bot]

> From: Ashish Yadav <ashish.yadav@infineon.com>
> 
> Adds support for the Infineon XDP730 Digital eFuse Controller by
> updating the existing XDP720 driver.
> 
> Signed-off-by: Ashish Yadav <ashish.yadav@infineon.com>

Sashiko has reviewed this patch and found no issues. It looks great!

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260601090925.3781-1-Ashish.Yadav@infineon.com?part=2

Re: [PATCH v3 1/2] dt-bindings: hwmon/pmbus: Add Infineon xdp730

[Krzysztof Kozlowski]

On Mon, Jun 01, 2026 at 02:39:24PM +0530, ASHISH YADAV wrote:
>  required:
>    - compatible
> @@ -50,10 +58,23 @@ examples:
>          #address-cells = <1>;
>          #size-cells = <0>;
>  
> -        hwmon@11 {
> +        efuse@11 {

Explain that in commit msg.

>              compatible = "infineon,xdp720";
>              reg = <0x11>;
>              vdd-vin-supply = <&vdd_vin>;
>              infineon,rimon-micro-ohms = <1098000000>;  /* 1.098k ohm */
>          };
>      };
> +
> +  - |
> +    i2c {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        efuse@12 {
> +            compatible = "infineon,xdp730";
> +            reg = <0x12>;
> +            vdd-vin-supply = <&vdd_vin>;
> +            infineon,rimon-micro-ohms = <1098000000>;  /* 1.098k ohm */

It's exactly the same as previous example, drop this hunk.

> +        };
> +    };
> -- 
> 2.39.5
>