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+.\" Copyright (c) 1980, 1991, 1993
+.\"	The Regents of the University of California.  All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\" $FreeBSD$
+.\"
+.Dd September 27, 2010
+.Dt GPIOCTL 1
+.Os
+.Sh NAME
+.Nm gpioctl
+.Nd GPIO control utility
+.Sh SYNOPSIS
+.Nm
+.Cm -l 
+.Fl f Ar ctldev
+.Op Fl v
+.Nm
+.Cm -t 
+.Fl f Ar ctldev
+.Ar pin
+.Nm
+.Cm -c 
+.Fl f Ar ctldev
+.Ar pin
+.Ar flag 
+.Op flag ...
+.Nm
+.Cm -f Ar ctldev 
+.Ar pin
+.Ar [0|1]
+.Sh DESCRIPTION
+The
+.Nm
+utility could be used to manage GPIO pins from userland and list available pins.
+.Pp
+The options are as follows:
+.Bl -tag -width ".Fl f Ar ctldev"
+.It Fl c Ar pin Ar flag Op flag ...
+Configure pin by setting provided flags. The following flags are currently defined:
+.Bl -tag -offset indent -width ".Cm PULSE"
+.It Cm IN
+Input pin
+.It Cm OUT
+Output pin
+.It Cm OD
+Open drain pin
+.It Cm PP
+Push pull pin
+.It Cm TS
+Tristate pin
+.It Cm PU
+Pull-up pin
+.It Cm PD
+Pull-down pin
+.It Cm II
+Inverted input pin
+.It Cm IO
+Inverted output pin
+.El
+.It Fl f Ar ctldev
+GPIO controller device to use
+.It Fl l
+list available pins
+.It Fl t Ar pin
+toggle value of provided pin number
+.It Fl v
+be verbose: for each listed pin print current configuration
+.El
+.Sh EXAMPLES
+.Pp
+.Bl -bullet
+.It
+List pins available on GPIO controller defined by device /dev/gpioctl0
+.Pp
+gpioctl -f /dev/gpioctl0 -l
+.It
+Set the value of pin 12 to 1
+.Pp
+gpioctl -f /dev/gpioctl0 12 1
+.It
+Configure pin 12 to be input pin
+.Pp
+gpioctl -f /dev/gpioctl0 -c 12 IN
+.El
+.Sh HISTORY
+The
+.Nm
+utility appeared in
+.Fx 9.0 .
+.Sh AUTHORS
+.An -nosplit
+The
+.Nm
+utility and this manual page were written by
+.An Oleksandr Tymoshenko
+.Aq gonzo@freebsd.org