--- /dev/null
+.. 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 <abdurrahman@nexthop.ai>
+
+
+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
+======================= ======================================================
corsair-psu
cros_ec_hwmon
crps
+ d1u74t
da9052
da9055
dell-smm-hwmon
F: include/dt-bindings/mux/
F: include/linux/mux/
+MURATA D1U74T PSU DRIVER
+M: Abdurrahman Hussain <abdurrahman@nexthop.ai>
+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 <b-liu@ti.com>
L: linux-usb@vger.kernel.org
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
obj-$(CONFIG_SENSORS_ZL6100) += zl6100.o
obj-$(CONFIG_SENSORS_PIM4328) += pim4328.o
obj-$(CONFIG_SENSORS_CRPS) += crps.o
+obj-$(CONFIG_SENSORS_D1U74T) += d1u74t.o
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright 2026 Nexthop Systems.
+ */
+
+#include <linux/i2c.h>
+#include <linux/of.h>
+#include <linux/module.h>
+#include <linux/pmbus.h>
+#include <linux/string.h>
+
+#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");
projects / thirdparty / linux.git / commitdiff
