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hwmon: (pmbus/max20860a) Add driver for Analog Devices MAX20860A
Add a PMBus driver for the Analog Devices MAX20860A step-down DC-DC switching regulator. The MAX20860A provides monitoring of input/output voltage, output current, and temperature via the PMBus interface using linear data format. Optional regulator support is available via CONFIG_SENSORS_MAX20860A_REGULATOR. Signed-off-by: Syed Arif <arif.syed@hpe.com> Signed-off-by: Sanman Pradhan <psanman@juniper.net> Link: https://lore.kernel.org/r/20260601184516.919488-3-sanman.pradhan@hpe.com Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Syed Arif
Guenter Roeck
parent
9ccccac56b
commit
9e8475a02b
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@ -163,6 +163,7 @@ Hardware Monitoring Kernel Drivers
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max20730
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max20751
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max20830
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max20860a
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max31722
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max31730
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max31760
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57
Documentation/hwmon/max20860a.rst
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57
Documentation/hwmon/max20860a.rst
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@ -0,0 +1,57 @@
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.. SPDX-License-Identifier: GPL-2.0
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Kernel driver max20860a
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=======================
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Supported chips:
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* Analog Devices MAX20860A
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Prefix: 'max20860a'
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Addresses scanned: -
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Datasheet: https://www.analog.com/en/products/max20860a.html
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Author:
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- Syed Arif <arif.syed@hpe.com>
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- Sanman Pradhan <psanman@juniper.net>
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Description
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-----------
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This driver supports hardware monitoring for Analog Devices MAX20860A
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Step-Down Switching Regulator with PMBus Interface.
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The MAX20860A is a fully integrated step-down DC-DC switching regulator.
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Through the PMBus interface, the device can monitor input/output voltages,
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output current 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.
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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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in2_alarm Output voltage alarm
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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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temp2_input Measured temperature (secondary)
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================= ========================================
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@ -15693,6 +15693,14 @@ F: Documentation/devicetree/bindings/hwmon/pmbus/adi,max20830.yaml
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F: Documentation/hwmon/max20830.rst
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F: drivers/hwmon/pmbus/max20830.c
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MAX20860A HARDWARE MONITOR DRIVER
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M: Sanman Pradhan <psanman@juniper.net>
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L: linux-hwmon@vger.kernel.org
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S: Maintained
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F: Documentation/devicetree/bindings/hwmon/pmbus/adi,max20860a.yaml
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F: Documentation/hwmon/max20860a.rst
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F: drivers/hwmon/pmbus/max20860a.c
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MAX2175 SDR TUNER DRIVER
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M: Ramesh Shanmugasundaram <rashanmu@gmail.com>
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L: linux-media@vger.kernel.org
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@ -402,6 +402,25 @@ config SENSORS_MAX20830
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This driver can also be built as a module. If so, the module will
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be called max20830.
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config SENSORS_MAX20860A
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tristate "Analog Devices MAX20860A"
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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 MAX20860A step-down converter.
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This driver can also be built as a module. If so, the module will
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be called max20860a.
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config SENSORS_MAX20860A_REGULATOR
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bool "Regulator support for MAX20860A"
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depends on SENSORS_MAX20860A && REGULATOR
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help
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If you say yes here you get regulator support for Analog Devices
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MAX20860A step-down converter.
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This enables the MAX20860A to be used as a regulator device,
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providing voltage control through the regulator framework.
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config SENSORS_MAX31785
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tristate "Maxim MAX31785 and compatibles"
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help
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@ -39,6 +39,7 @@ 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_MAX20830) += max20830.o
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obj-$(CONFIG_SENSORS_MAX20860A) += max20860a.o
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obj-$(CONFIG_SENSORS_MAX31785) += max31785.o
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obj-$(CONFIG_SENSORS_MAX34440) += max34440.o
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obj-$(CONFIG_SENSORS_MAX8688) += max8688.o
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68
drivers/hwmon/pmbus/max20860a.c
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68
drivers/hwmon/pmbus/max20860a.c
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@ -0,0 +1,68 @@
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Hardware monitoring driver for Analog Devices MAX20860A
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*
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* SPDX-FileCopyrightText: Copyright Hewlett Packard Enterprise Development LP
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*/
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#include <linux/i2c.h>
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#include <linux/module.h>
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#include <linux/regulator/driver.h>
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#include "pmbus.h"
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#if IS_ENABLED(CONFIG_SENSORS_MAX20860A_REGULATOR)
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static const struct regulator_desc max20860a_reg_desc[] = {
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PMBUS_REGULATOR_ONE("vout"),
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};
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#endif
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static struct pmbus_driver_info max20860a_info = {
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.pages = 1,
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.format[PSC_VOLTAGE_IN] = linear,
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.format[PSC_VOLTAGE_OUT] = linear,
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.format[PSC_CURRENT_OUT] = linear,
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.format[PSC_TEMPERATURE] = linear,
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.func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT |
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PMBUS_HAVE_STATUS_VOUT |
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PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
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PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 |
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PMBUS_HAVE_STATUS_TEMP | PMBUS_HAVE_STATUS_INPUT,
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#if IS_ENABLED(CONFIG_SENSORS_MAX20860A_REGULATOR)
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.num_regulators = 1,
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.reg_desc = max20860a_reg_desc,
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#endif
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};
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static int max20860a_probe(struct i2c_client *client)
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{
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return pmbus_do_probe(client, &max20860a_info);
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}
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static const struct i2c_device_id max20860a_id[] = {
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{"max20860a"},
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{}
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};
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MODULE_DEVICE_TABLE(i2c, max20860a_id);
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static const struct of_device_id max20860a_of_match[] = {
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{ .compatible = "adi,max20860a" },
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{}
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};
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MODULE_DEVICE_TABLE(of, max20860a_of_match);
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static struct i2c_driver max20860a_driver = {
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.driver = {
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.name = "max20860a",
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.of_match_table = max20860a_of_match,
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},
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.probe = max20860a_probe,
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.id_table = max20860a_id,
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};
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module_i2c_driver(max20860a_driver);
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MODULE_AUTHOR("Syed Arif <arif.syed@hpe.com>");
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MODULE_AUTHOR("Sanman Pradhan <psanman@juniper.net>");
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MODULE_DESCRIPTION("PMBus driver for Analog Devices MAX20860A");
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MODULE_LICENSE("GPL");
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MODULE_IMPORT_NS("PMBUS");
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