Description¶

This driver implements support for the Nuvoton NCT6683D eSIO chip.

The chips implement up to shared 32 temperature and voltage sensors.It supports up to 16 fan rotation sensors and up to 8 fan control engines.

Temperatures are measured in degrees Celsius. Measurement resolution is0.5 degrees C.

Voltage sensors (also known as IN sensors) report their values in millivolts.

Fan rotation speeds are reported in RPM (rotations per minute).

Usage Note¶

Limit register locations on Intel boards with EC firmware version 1.0build date 04/03/13 do not match the register locations in the Nuvotondatasheet. Nuvoton confirms that Intel uses a special firmware versionwith different register addresses. The specification describing the Intelfirmware is held under NDA by Nuvoton and Intel and not availableto the public.

Some of the register locations can be reverse engineered; others are toowell hidden. Given this, writing any values from the operating system isconsidered too risky with this firmware and has been disabled. All limitsmust all be written from the BIOS.

The driver has only been tested with the Intel firmware, and by defaultonly instantiates on Intel boards. To enable it on non-Intel boards,set the ‘force’ module parameter to 1.

Tested Boards and Firmware Versions¶

The driver has been reported to work with the following boards andfirmware versions.