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hwmon: (pmbus/max17616): add driver for max17616
Add support for the Analog Devices MAX17616/MAX17616A Current-Limiter with Overvoltage/Surge, Undervoltage, Reverse Polarity, Loss of Ground Protection with PMBus Interface. The PMBus interface allows monitoring of input/output voltages, output current and temperature. Signed-off-by: Kim Seer Paller <kimseer.paller@analog.com>
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‎Documentation/hwmon/index.rst‎

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@@ -143,6 +143,7 @@ Hardware Monitoring Kernel Drivers
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max1619
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max16601
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max1668
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max17616
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max197
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max20730
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max20751

‎Documentation/hwmon/max17616.rst‎

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.. SPDX-License-Identifier: GPL-2.0
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Kernel driver max17616
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====================
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Supported chips:
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* Analog Devices MAX17616/MAX17616A
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Prefix: 'max17616'
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Addresses scanned: -
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Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/max17616-max17616a.pdf
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Authors: Kim Seer Paller <kimseer.paller@analog.com>
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Description
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-----------
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This driver supports hardware monitoring for Analog Devices MAX17616/MAX17616A
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Current-Limiter with OV/Surge, UV, Reverse Polarity, Loss of Ground Protection
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with PMBus Interface.
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The MAX17616/MAX17616A is a 3V to 80V, 7A current-limiter with overvoltage,
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surge, undervoltage, reverse polarity, and loss of ground protection. Through
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the PMBus interface, the device can monitor input/output voltages, output current
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and temperature.
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The driver is a client driver to the core PMBus driver. Please see
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Documentation/hwmon/pmbus.rst for details on PMBus client drivers.
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Usage Notes
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-----------
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This driver does not auto-detect devices. You will have to instantiate
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the devices explicitly. Please see Documentation/i2c/instantiating-devices.rst
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for details.
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Platform data support
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---------------------
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The driver supports standard PMBus driver platform data.
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Sysfs entries
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-------------
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================= ========================================
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in1_label "vin"
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in1_input Measured input voltage
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in1_alarm Input voltage alarm
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in2_label "vout1"
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in2_input Measured output voltage
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curr1_label "iout1"
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curr1_input Measured output current.
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curr1_alarm Output current alarm
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temp1_input Measured temperature
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temp1_alarm Chip temperature alarm
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================= ========================================

‎MAINTAINERS‎

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S: Supported
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W: https://ez.analog.com/linux-software-drivers
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F: Documentation/devicetree/bindings/hwmon/pmbus/adi,max17616.yaml
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F: Documentation/hwmon/max17616.rst
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F: drivers/hwmon/pmbus/max17616.c
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MAX2175 SDR TUNER DRIVER
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M: Ramesh Shanmugasundaram <rashanmu@gmail.com>

‎drivers/hwmon/pmbus/Kconfig‎

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This driver can also be built as a module. If so, the module will
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be called max16601.
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config SENSORS_MAX17616
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tristate "Analog Devices MAX17616/MAX17616A"
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help
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If you say yes here you get hardware monitoring support for Analog
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Devices MAX17616/MAX17616A.
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This driver can also be built as a module. If so, the module will
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be called max17616.
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config SENSORS_MAX20730
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tristate "Maxim MAX20710, MAX20730, MAX20734, MAX20743"
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help

‎drivers/hwmon/pmbus/Makefile‎

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obj-$(CONFIG_SENSORS_MAX15301) += max15301.o
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obj-$(CONFIG_SENSORS_MAX16064) += max16064.o
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obj-$(CONFIG_SENSORS_MAX16601) += max16601.o
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obj-$(CONFIG_SENSORS_MAX17616) += max17616.o
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obj-$(CONFIG_SENSORS_MAX20730) += max20730.o
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obj-$(CONFIG_SENSORS_MAX20751) += max20751.o
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obj-$(CONFIG_SENSORS_MAX31785) += max31785.o

‎drivers/hwmon/pmbus/max17616.c‎

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// SPDX-License-Identifier: GPL-2.0
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/*
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* Hardware monitoring driver for Analog Devices MAX17616/MAX17616A
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*
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* Copyright (C) 2025 Analog Devices, Inc.
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*/
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#include <linux/err.h>
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#include <linux/i2c.h>
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#include <linux/mod_devicetable.h>
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#include <linux/module.h>
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#include "pmbus.h"
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static struct pmbus_driver_info max17616_info = {
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.pages = 1,
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.format[PSC_VOLTAGE_IN] = direct,
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.m[PSC_VOLTAGE_IN] = 512,
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.b[PSC_VOLTAGE_IN] = -18,
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.R[PSC_VOLTAGE_IN] = -1,
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.format[PSC_VOLTAGE_OUT] = direct,
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.m[PSC_VOLTAGE_OUT] = 512,
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.b[PSC_VOLTAGE_OUT] = -18,
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.R[PSC_VOLTAGE_OUT] = -1,
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.format[PSC_CURRENT_OUT] = direct,
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.m[PSC_CURRENT_OUT] = 5845,
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.b[PSC_CURRENT_OUT] = 80,
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.R[PSC_CURRENT_OUT] = -1,
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.format[PSC_TEMPERATURE] = direct,
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.m[PSC_TEMPERATURE] = 71,
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.b[PSC_TEMPERATURE] = 19653,
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.R[PSC_TEMPERATURE] = -1,
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.func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT |
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PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_VOUT |
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PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_STATUS_INPUT |
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PMBUS_HAVE_STATUS_TEMP,
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};
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static int max17616_probe(struct i2c_client *client)
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{
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struct device *dev = &client->dev;
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u8 buf[I2C_SMBUS_BLOCK_MAX];
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int ret;
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if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_READ_I2C_BLOCK))
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return -ENODEV;
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ret = i2c_smbus_read_i2c_block_data(client, PMBUS_MFR_MODEL, sizeof(buf), buf);
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if (ret < 0)
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return dev_err_probe(dev, ret, "Failed to read MFR_MODEL\n");
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if ((strncmp(buf + 1, "MAX17616", 8) && strncmp(buf + 1, "MAX17616A", 9)))
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return dev_err_probe(dev, -ENODEV, "Unsupported device\n");
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return pmbus_do_probe(client, &max17616_info);
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}
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static const struct i2c_device_id max17616_id[] = {
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{ "max17616" },
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{ "max17616a" },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, max17616_id);
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static const struct of_device_id __maybe_unused max17616_of_match[] = {
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{ .compatible = "adi,max17616" },
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{ .compatible = "adi,max17616a" },
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{ }
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};
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MODULE_DEVICE_TABLE(of, max17616_of_match);
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static struct i2c_driver max17616_driver = {
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.driver = {
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.name = "max17616",
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.of_match_table = of_match_ptr(max17616_of_match),
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},
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.probe = max17616_probe,
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.id_table = max17616_id,
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};
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module_i2c_driver(max17616_driver);
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MODULE_AUTHOR("Kim Seer Paller <kim.seer.paller@analog.com>");
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MODULE_DESCRIPTION("PMBus driver for Analog Devices MAX17616/MAX17616A");
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MODULE_LICENSE("GPL");
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MODULE_IMPORT_NS(PMBUS);

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