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Tue, 19 May 2026 00:56:34 -0700 (PDT) From: ASHISH YADAV X-Google-Original-From: ASHISH YADAV To: Guenter Roeck , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-hwmon@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Ashish Yadav Subject: [PATCH 1/2] dt-bindings: hwmon/pmbus: Add Infineon XDP730 Date: Tue, 19 May 2026 13:25:57 +0530 Message-Id: <20260519075558.91466-2-Ashish.Yadav@infineon.com> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20260519075558.91466-1-Ashish.Yadav@infineon.com> References: <20260519075558.91466-1-Ashish.Yadav@infineon.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Ashish Yadav Add documentation for the device tree binding of the XDP730 eFuse. Signed-off-by: Ashish Yadav --- .../bindings/hwmon/pmbus/infineon,xdp730.yaml | 59 +++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 Documentation/devicetree/bindings/hwmon/pmbus/infineon,= xdp730.yaml diff --git a/Documentation/devicetree/bindings/hwmon/pmbus/infineon,xdp730.= yaml b/Documentation/devicetree/bindings/hwmon/pmbus/infineon,xdp730.yaml new file mode 100644 index 000000000000..a7361a07891c --- /dev/null +++ b/Documentation/devicetree/bindings/hwmon/pmbus/infineon,xdp730.yaml @@ -0,0 +1,59 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- + +$id: http://devicetree.org/schemas/hwmon/pmbus/infineon,xdp730.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Infineon XDP730 Digital eFuse Controller + +maintainers: + - Ashish Yadav + +description: | + The XDP730 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. + + Datasheet: + https://www.infineon.com/assets/row/public/documents/24/49/infineon-x= dp730-001-datasheet-en.pdf + +properties: + compatible: + enum: + - infineon,xdp730 + + reg: + maxItems: 1 + + infineon,rimon-micro-ohms: + description: + The value of the RIMON resistor, in micro ohms, required to enable + the system overcurrent protection. + + vdd-vin-supply: + description: + Supply for the VDD_VIN pin (pin 20), the IC controller power supply. + Typically connected to the input bus (VIN) through a 100 ohm / 100 nF + RC filter. + +required: + - compatible + - reg + - vdd-vin-supply + +additionalProperties: false + +examples: + - | + i2c { + #address-cells =3D <1>; + #size-cells =3D <0>; + + hwmon@11 { + compatible =3D "infineon,xdp730"; + reg =3D <0x11>; + vdd-vin-supply =3D <&vdd_vin>; + infineon,rimon-micro-ohms =3D <1098000000>; /* 1.098k ohm */ + }; + }; --=20 2.39.5 From nobody Mon May 25 03:47:24 2026 Received: from mail-pj1-f51.google.com (mail-pj1-f51.google.com [209.85.216.51]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9FCD03DBD51 for ; 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charset="utf-8" From: Ashish Yadav Add the pmbus driver for Infineon XDP730 Digital eFuse Controller. Signed-off-by: Ashish Yadav --- XDP730 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 4.4.2 and 4.4.4 for more details: https://www.infineon.com/assets/row/public/documents/24/49/infineon-xdp730-= 001-datasheet-en.pdf The GIMON (microA/A) depends on the 10th bit of TELEMETRY_AVG PMBUS Registe= r. The value of RIMON (kohm) can be provided by the user through device tree u= sing infineon,rimon-micro-ohms property. --- drivers/hwmon/pmbus/Kconfig | 9 +++ drivers/hwmon/pmbus/Makefile | 1 + drivers/hwmon/pmbus/xdp730.c | 128 +++++++++++++++++++++++++++++++++++ 3 files changed, 138 insertions(+) create mode 100644 drivers/hwmon/pmbus/xdp730.c diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig index 8f4bff375ecb..11c26a495e31 100644 --- a/drivers/hwmon/pmbus/Kconfig +++ b/drivers/hwmon/pmbus/Kconfig @@ -720,6 +720,15 @@ config SENSORS_XDP720 This driver can also be built as a module. If so, the module will be called xdp720. =20 +config SENSORS_XDP730 + tristate "Infineon XDP730 family" + help + If you say yes here you get hardware monitoring support for Infineon + XDP730. + + This driver can also be built as a module. If so, the module will + be called xdp730. + config SENSORS_XDPE152 tristate "Infineon XDPE152 family" help diff --git a/drivers/hwmon/pmbus/Makefile b/drivers/hwmon/pmbus/Makefile index 7129b62bc00f..32061c2ed29c 100644 --- a/drivers/hwmon/pmbus/Makefile +++ b/drivers/hwmon/pmbus/Makefile @@ -70,6 +70,7 @@ obj-$(CONFIG_SENSORS_UCD9000) +=3D ucd9000.o obj-$(CONFIG_SENSORS_UCD9200) +=3D ucd9200.o obj-$(CONFIG_SENSORS_XDP710) +=3D xdp710.o obj-$(CONFIG_SENSORS_XDP720) +=3D xdp720.o +obj-$(CONFIG_SENSORS_XDP730) +=3D xdp730.o obj-$(CONFIG_SENSORS_XDPE122) +=3D xdpe12284.o obj-$(CONFIG_SENSORS_XDPE152) +=3D xdpe152c4.o obj-$(CONFIG_SENSORS_XDPE1A2G7B) +=3D xdpe1a2g7b.o diff --git a/drivers/hwmon/pmbus/xdp730.c b/drivers/hwmon/pmbus/xdp730.c new file mode 100644 index 000000000000..ea8968de9f26 --- /dev/null +++ b/drivers/hwmon/pmbus/xdp730.c @@ -0,0 +1,128 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Hardware monitoring driver for Infineon XDP730 Digital eFuse Controller + * + * Copyright (c) 2026 Infineon Technologies. All rights reserved. + */ + +#include +#include +#include +#include +#include +#include +#include +#include "pmbus.h" + +/* + * The IMON resistor required to generate the system overcurrent protectio= n. + * Arbitrary default Rimon value: 2k Ohm + */ +#define XDP730_DEFAULT_RIMON 2000000000 /* 2k ohm */ +#define XDP730_TELEMETRY_AVG 0xE9 + +static struct pmbus_driver_info xdp730_info =3D { + .pages =3D 1, + .format[PSC_VOLTAGE_IN] =3D direct, + .format[PSC_VOLTAGE_OUT] =3D direct, + .format[PSC_CURRENT_OUT] =3D direct, + .format[PSC_POWER] =3D direct, + .format[PSC_TEMPERATURE] =3D direct, + + .m[PSC_VOLTAGE_IN] =3D 4653, + .b[PSC_VOLTAGE_IN] =3D 0, + .R[PSC_VOLTAGE_IN] =3D -2, + .m[PSC_VOLTAGE_OUT] =3D 4653, + .b[PSC_VOLTAGE_OUT] =3D 0, + .R[PSC_VOLTAGE_OUT] =3D -2, + /* + * Current and Power measurement depends on the RIMON (kOhm) and + * GIMON(microA/A) values. + */ + .m[PSC_CURRENT_OUT] =3D 24668, + .b[PSC_CURRENT_OUT] =3D 0, + .R[PSC_CURRENT_OUT] =3D -4, + .m[PSC_POWER] =3D 4486, + .b[PSC_POWER] =3D 0, + .R[PSC_POWER] =3D -1, + .m[PSC_TEMPERATURE] =3D 54, + .b[PSC_TEMPERATURE] =3D 22521, + .R[PSC_TEMPERATURE] =3D -1, + + .func[0] =3D 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 xdp730_probe(struct i2c_client *client) +{ + struct pmbus_driver_info *info; + int ret; + u32 rimon; + int gimon; + + info =3D devm_kmemdup(&client->dev, &xdp730_info, sizeof(*info), + GFP_KERNEL); + if (!info) + return -ENOMEM; + + ret =3D devm_regulator_get_enable(&client->dev, "vdd-vin"); + if (ret) + return dev_err_probe(&client->dev, ret, + "failed to enable vdd-vin supply\n"); + + ret =3D i2c_smbus_read_word_data(client, XDP730_TELEMETRY_AVG); + if (ret < 0) { + dev_err(&client->dev, "Can't get TELEMETRY_AVG\n"); + return ret; + } + + ret >>=3D 10; /* 10th bit of TELEMETRY_AVG REG for GIMON Value */ + ret &=3D GENMASK(0, 0); + if (ret =3D=3D 1) + gimon =3D 20000; /* output gain 20 microA/A */ + else + gimon =3D 10000; /* output gain 10 microA/A */ + + if (of_property_read_u32(client->dev.of_node, + "infineon,rimon-micro-ohms", &rimon)) + rimon =3D XDP730_DEFAULT_RIMON; /* Default if not set via DT */ + if (rimon =3D=3D 0) + return -EINVAL; + + /* Adapt the current and power scale for each instance */ + info->m[PSC_CURRENT_OUT] =3D DIV64_U64_ROUND_CLOSEST((u64) + info->m[PSC_CURRENT_OUT] * rimon * gimon, 1000000000000ULL); + info->m[PSC_POWER] =3D DIV64_U64_ROUND_CLOSEST((u64) + info->m[PSC_POWER] * rimon * gimon, 1000000000000000ULL); + + return pmbus_do_probe(client, info); +} + +static const struct of_device_id xdp730_of_match[] =3D { + { .compatible =3D "infineon,xdp730" }, + {} +}; +MODULE_DEVICE_TABLE(of, xdp730_of_match); + +static const struct i2c_device_id xdp730_id[] =3D { + { "xdp730" }, + {} +}; +MODULE_DEVICE_TABLE(i2c, xdp730_id); + +static struct i2c_driver xdp730_driver =3D { + .driver =3D { + .name =3D "xdp730", + .of_match_table =3D xdp730_of_match, + }, + .probe =3D xdp730_probe, + .id_table =3D xdp730_id, +}; + +module_i2c_driver(xdp730_driver); + +MODULE_AUTHOR("Ashish Yadav "); +MODULE_DESCRIPTION("PMBus driver for Infineon XDP730 Digital eFuse Control= ler"); +MODULE_LICENSE("GPL"); +MODULE_IMPORT_NS("PMBUS"); --=20 2.39.5