From: Abdurrahman Hussain Date: Fri, 15 May 2026 03:03:26 +0000 (-0700) Subject: hwmon: (pmbus/d1u74t) Add Murata D1U74T PSU driver X-Git-Url: http://git.ipfire.org/gitweb/?a=commitdiff_plain;h=ef68b3dbbe3968b1b409e4fe5190c187d3bc39ef;p=thirdparty%2Flinux.git hwmon: (pmbus/d1u74t) Add Murata D1U74T PSU driver Add PMBUS driver for Murata D1U74T power supplies. Signed-off-by: Abdurrahman Hussain Link: https://lore.kernel.org/r/20260514-d1u74t-v4-2-1f1ee7b002ec@nexthop.ai [groeck: Dropped inappropriate tags; added missing include files] Signed-off-by: Guenter Roeck --- diff --git a/Documentation/hwmon/d1u74t.rst b/Documentation/hwmon/d1u74t.rst new file mode 100644 index 0000000000000..3a9eedbda4837 --- /dev/null +++ b/Documentation/hwmon/d1u74t.rst @@ -0,0 +1,81 @@ +.. SPDX-License-Identifier: GPL-2.0-or-later + +Kernel driver d1u74t +==================== + +Supported chips: + + * Murata D1U74T + + Prefix: 'd1u74t' + + Addresses scanned: - + + Datasheet: Publicly available at the Murata website + +Authors: + Abdurrahman Hussain + + +Description +----------- + +This driver implements support for Murata D1U74T Power Supply with +PMBus support. + +The driver is a client driver to the core PMBus driver. +Please see Documentation/hwmon/pmbus.rst for details on PMBus client drivers. + + +Usage Notes +----------- + +This driver does not auto-detect devices. You will have to instantiate the +devices explicitly. Please see Documentation/i2c/instantiating-devices.rst for +details. + + +Sysfs entries +------------- + +======================= ====================================================== +curr1_label "iin" +curr1_input Measured input current +curr1_alarm Input current alarm +curr1_rated_max Maximum rated input current + +curr2_label "iout1" +curr2_input Measured output current +curr2_max Maximum output current +curr2_max_alarm Output current high alarm +curr2_crit Critical high output current +curr2_crit_alarm Output current critical high alarm +curr2_rated_max Maximum rated output current + +in1_label "vin" +in1_input Measured input voltage +in1_alarm Input voltage alarm +in1_rated_min Minimum rated input voltage +in1_rated_max Maximum rated input voltage + +in2_label "vout1" +in2_input Measured output voltage +in2_alarm Output voltage alarm +in2_rated_min Minimum rated output voltage +in2_rated_max Maximum rated output voltage + +power1_label "pin" +power1_input Measured input power +power1_alarm Input power alarm +power1_rated_max Maximum rated input power + +temp[1-3]_input Measured temperature +temp[1-3]_max Maximum temperature +temp[1-3]_max_alarm Maximum temperature alarm +temp[1-3]_rated_max Maximum rated temperature + +fan1_alarm Fan 1 warning +fan1_fault Fan 1 fault +fan1_input Fan 1 speed in RPM +fan1_target Fan 1 target +======================= ====================================================== diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst index 78c783f11e250..e880c6ca84f03 100644 --- a/Documentation/hwmon/index.rst +++ b/Documentation/hwmon/index.rst @@ -61,6 +61,7 @@ Hardware Monitoring Kernel Drivers corsair-psu cros_ec_hwmon crps + d1u74t da9052 da9055 dell-smm-hwmon diff --git a/MAINTAINERS b/MAINTAINERS index 5d4453414e772..d57da4881737f 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -18284,6 +18284,13 @@ F: drivers/mux/ F: include/dt-bindings/mux/ F: include/linux/mux/ +MURATA D1U74T PSU DRIVER +M: Abdurrahman Hussain +L: linux-hwmon@vger.kernel.org +S: Maintained +F: Documentation/hwmon/d1u74t.rst +F: drivers/hwmon/pmbus/d1u74t.c + MUSB MULTIPOINT HIGH SPEED DUAL-ROLE CONTROLLER M: Bin Liu L: linux-usb@vger.kernel.org diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig index c3bb6df2655ad..64f38654f4e7c 100644 --- a/drivers/hwmon/pmbus/Kconfig +++ b/drivers/hwmon/pmbus/Kconfig @@ -113,6 +113,15 @@ config SENSORS_CRPS This driver can also be built as a module. If so, the module will be called crps. +config SENSORS_D1U74T + tristate "Murata D1U74T Power Supply" + help + If you say yes here you get hardware monitoring support for the Murata + D1U74T Power Supply. + + This driver can also be built as a module. If so, the module will + be called d1u74t. + config SENSORS_DELTA_AHE50DC_FAN tristate "Delta AHE-50DC fan control module" help diff --git a/drivers/hwmon/pmbus/Makefile b/drivers/hwmon/pmbus/Makefile index efd70b00ca2eb..1f2c73b71953e 100644 --- a/drivers/hwmon/pmbus/Makefile +++ b/drivers/hwmon/pmbus/Makefile @@ -80,3 +80,4 @@ obj-$(CONFIG_SENSORS_XDPE1A2G7B) += xdpe1a2g7b.o obj-$(CONFIG_SENSORS_ZL6100) += zl6100.o obj-$(CONFIG_SENSORS_PIM4328) += pim4328.o obj-$(CONFIG_SENSORS_CRPS) += crps.o +obj-$(CONFIG_SENSORS_D1U74T) += d1u74t.o diff --git a/drivers/hwmon/pmbus/d1u74t.c b/drivers/hwmon/pmbus/d1u74t.c new file mode 100644 index 0000000000000..752df3af9c1a1 --- /dev/null +++ b/drivers/hwmon/pmbus/d1u74t.c @@ -0,0 +1,88 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright 2026 Nexthop Systems. + */ + +#include +#include +#include +#include +#include + +#include "pmbus.h" + +static const struct i2c_device_id d1u74t_id[] = { + { "d1u74t" }, + {}, +}; +MODULE_DEVICE_TABLE(i2c, d1u74t_id); + +static struct pmbus_driver_info d1u74t_info = { + .pages = 1, + /* PSU uses default linear data format. */ + .func[0] = PMBUS_HAVE_PIN | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | + PMBUS_HAVE_IIN | PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT | + PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_TEMP | + PMBUS_HAVE_TEMP2 | PMBUS_HAVE_TEMP3 | + PMBUS_HAVE_STATUS_TEMP | PMBUS_HAVE_FAN12 | + PMBUS_HAVE_STATUS_FAN12, +}; + +static int d1u74t_probe(struct i2c_client *client) +{ + char buf[I2C_SMBUS_BLOCK_MAX + 2] = { 0 }; + struct device *dev = &client->dev; + int rc; + + rc = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, buf); + if (rc < 0) + return dev_err_probe(dev, rc, "Failed to read PMBUS_MFR_ID\n"); + + if (rc != 9 || strncmp(buf, "Murata-PS", 9)) { + buf[rc] = '\0'; + return dev_err_probe(dev, -ENODEV, + "Unsupported Manufacturer ID '%s'\n", + buf); + } + + rc = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, buf); + if (rc < 0) + return dev_err_probe(dev, rc, + "Failed to read PMBUS_MFR_MODEL\n"); + + if (rc < 8 || strncmp(buf, "D1U74T-W", 8)) { + buf[rc] = '\0'; + return dev_err_probe(dev, -ENODEV, "Model '%s' not supported\n", + buf); + } + + rc = pmbus_do_probe(client, &d1u74t_info); + if (rc) + return dev_err_probe(dev, rc, "Failed to probe\n"); + + return 0; +} + +static const struct of_device_id d1u74t_of_match[] = { + { + .compatible = "murata,d1u74t", + }, + {}, +}; +MODULE_DEVICE_TABLE(of, d1u74t_of_match); + +static struct i2c_driver d1u74t_driver = { + .driver = { + .name = "d1u74t", + .of_match_table = d1u74t_of_match, + }, + .probe = d1u74t_probe, + .id_table = d1u74t_id, +}; + +module_i2c_driver(d1u74t_driver); + +MODULE_AUTHOR("Abdurrahman Hussain"); +MODULE_DESCRIPTION("PMBus driver for Murata D1U74T-W power supplies"); +MODULE_LICENSE("GPL"); +MODULE_IMPORT_NS("PMBUS");