Kernel driver max20751

Supported chips:

Author: Guenter Roeck <>


This driver supports MAX20751 Multiphase Master with PMBus Interface and Internal Buck Converter.

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.

Platform data support

The driver supports standard PMBus driver platform data.

Sysfs entries

The following attributes are supported.

in1_label “vin1”
in1_input Measured voltage.
in1_min Minimum input voltage.
in1_max Maximum input voltage.
in1_lcrit Critical minimum input voltage.
in1_crit Critical maximum input voltage.
in1_min_alarm Input voltage low alarm.
in1_lcrit_alarm Input voltage critical low alarm.
in1_min_alarm Input voltage low alarm.
in1_max_alarm Input voltage high alarm.
in2_label “vout1”
in2_input Measured voltage.
in2_min Minimum output voltage.
in2_max Maximum output voltage.
in2_lcrit Critical minimum output voltage.
in2_crit Critical maximum output voltage.
in2_min_alarm Output voltage low alarm.
in2_lcrit_alarm Output voltage critical low alarm.
in2_min_alarm Output voltage low alarm.
in2_max_alarm Output voltage high alarm.
curr1_input Measured output current.
curr1_label “iout1”
curr1_max Maximum output current.
curr1_alarm Current high alarm.
temp1_input Measured temperature.
temp1_max Maximum temperature.
temp1_crit Critical high temperature.
temp1_max_alarm Chip temperature high alarm.
temp1_crit_alarm Chip temperature critical high alarm.
power1_input Output power.
power1_label “pout1”