.\" $FreeBSD$
.\"
.Dd Apr 18, 2023
.Dt NCTHWM 4
.Os
.Sh NAME
.Nm ncthwm
.Nd Hardware monitoring controller on Nuvoton Super I/Os
.Sh SYNOPSIS
.Cd "device ncthwm"
.Cd "device superio"
.Sh DESCRIPTION
The
.Nm
is a driver for hardware monitoring controller that can be found in Nuvoton
Super I/O chips. It expose fan speed via
.Xr sysctl 8 .

.Pp
The
.Nm
driver supports the following chips:
.Pp
.Bl -bullet -compact
.It
Nuvoton NCT6779
.It
Nuvoton NCT6796D-E
.El

.Sh SYSCTL VARIABLES
These variables are available as read-only
.Xr sysctl 8
variables:
.Bl -tag -width indent
.It Va dev.ncthwm.0.CPUFAN
CPU fan speed in RPM.
.It Va dev.ncthwm.0.SYSFAN
System fan speed in RPM.
.It Va dev.ncthwm.0.AUXFAN0
AUX0 fan speed in RPM.
.It Va dev.ncthwm.0.AUXFAN1
AUX1 fan speed in RPM.
.It Va dev.ncthwm.0.AUXFAN2
AUX2 fan speed in RPM.
.El

.Sh HISTORY
The driver first appeared in
.Fx 14.0 .
.Sh AUTHORS
The driver was initially written by
.An Stéphane Rochoy Aq Mt stephane.rochoy@stormshield.eu .