Hardware monitoring devices let you monitor the hardware health
of a system. Most modern motherboards include such a device. It
can include temperature sensors, voltage sensors, fan speed
sensors and various additional features such as the ability to
control the speed of the fans. If you want this support you
should say Y here and also to the specific driver(s) for your
sensors chip(s) below.

To find out which specific driver(s) you need, use the
sensors-detect script from the lm_sensors package. Read
Documentation/hwmon/userspace-tools for details.

This support can also be built as a module. If so, the module
will be called hwmon.

source code:

drivers/hwmon/hwmon.c