Kernel driver max31790

Supported chips:

Author: Guenter Roeck <>


This driver implements support for Maxim MAX31730.

The MAX31730 temperature sensor monitors its own temperature and the temperatures of three external diode-connected transistors. The operating supply voltage is from 3.0V to 3.6V. Resistance cancellation compensates for high series resistance in circuit-board traces and the external thermal diode, while beta compensation corrects for temperature-measurement errors due to low-beta sensing transistors.

Sysfs entries

temp[1-4]_enable RW Temperature enable/disable Set to 0 to enable channel, 0 to disable
temp[1-4]_input RO Temperature input
temp[2-4]_fault RO Fault indicator for remote channels
temp[1-4]_max RW Maximum temperature
temp[1-4]_max_alarm RW Maximum temperature alarm
temp[1-4]_min RW Minimum temperature. Common for all channels. Only temp1_min is writeable.
temp[1-4]_min_alarm RO Minimum temperature alarm
temp[2-4]_offset RW Temperature offset for remote channels