Kernel driver max20730

Supported chips:

Author: Guenter Roeck <>


This driver implements support for Maxim MAX20710, MAX20730, MAX20734, and MAX20743 Integrated, Step-Down Switching Regulators 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_crit RW/RO Critical output current. Please see datasheet for supported limits. Read-only if the chip is write protected; read-write otherwise.
curr1_crit_alarm RO Output current critical alarm
curr1_input RO Output current
curr1_label RO ‘iout1’
in1_alarm RO Input voltage alarm
in1_input RO Input voltage
in1_label RO ‘vin’
in2_alarm RO Output voltage alarm
in2_input RO Output voltage
in2_label RO ‘vout1’
temp1_crit RW/RO Critical temeperature. Supported values are 130 or 150 degrees C. Read-only if the chip is write protected; read-write otherwise.
temp1_crit_alarm RO Temperature critical alarm
temp1_input RO Chip temperature