Kernel driver max16064

Supported chips:

Author: Guenter Roeck <>


This driver supports hardware monitoring for Maxim MAX16064 Quad Power-Supply Controller with Active-Voltage Output Control and PMBus Interface.

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. Limits are read-write; all other attributes are read-only.

in[1-4]_label “vout[1-4]”
in[1-4]_input Measured voltage. From READ_VOUT register.
in[1-4]_min Minimum Voltage. From VOUT_UV_WARN_LIMIT register.
in[1-4]_max Maximum voltage. From VOUT_OV_WARN_LIMIT register.
in[1-4]_lcrit Critical minimum Voltage. VOUT_UV_FAULT_LIMIT register.
in[1-4]_crit Critical maximum voltage. From VOUT_OV_FAULT_LIMIT register.
in[1-4]_min_alarm Voltage low alarm. From VOLTAGE_UV_WARNING status.
in[1-4]_max_alarm Voltage high alarm. From VOLTAGE_OV_WARNING status.
in[1-4]_lcrit_alarm Voltage critical low alarm. From VOLTAGE_UV_FAULT status.
in[1-4]_crit_alarm Voltage critical high alarm. From VOLTAGE_OV_FAULT status.
in[1-4]_highest Historical maximum voltage.
in[1-4]_reset_history Write any value to reset history.
temp1_input Measured temperature. From READ_TEMPERATURE_1 register.
temp1_max Maximum temperature. From OT_WARN_LIMIT register.
temp1_crit Critical high temperature. From OT_FAULT_LIMIT register.
temp1_max_alarm Chip temperature high alarm. Set by comparing READ_TEMPERATURE_1 with OT_WARN_LIMIT if TEMP_OT_WARNING status is set.
temp1_crit_alarm Chip temperature critical high alarm. Set by comparing READ_TEMPERATURE_1 with OT_FAULT_LIMIT if TEMP_OT_FAULT status is set.
temp1_highest Historical maximum temperature.
temp1_reset_history Write any value to reset history.