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22e3858c24
hrs@ provided this verison of the patch and showed me where all the needed changes were to be made outside of gpioctl.c Approved by: re (hrs) MFC after: 2 weeks
124 lines
3.1 KiB
Groff
124 lines
3.1 KiB
Groff
.\" Copyright (c) 1980, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd August 13, 2013
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.Dt GPIOCTL 1
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.Os
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.Sh NAME
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.Nm gpioctl
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.Nd GPIO control utility
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.Sh SYNOPSIS
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.Nm
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.Cm -l
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.Op Fl f Ar ctldev
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.Op Fl v
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.Nm
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.Cm -t
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.Op Fl f Ar ctldev
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.Ar pin
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.Nm
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.Cm -c
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.Op Fl f Ar ctldev
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.Ar pin
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.Ar flag
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.Op flag ...
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.Nm
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.Op Cm -f Ar ctldev
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.Ar pin
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.Ar [0|1]
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.Sh DESCRIPTION
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The
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.Nm
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utility could be used to manage GPIO pins from userland and list available pins.
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.Pp
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The options are as follows:
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.Bl -tag -width ".Fl f Ar ctldev"
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.It Fl c Ar pin Ar flag Op flag ...
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Configure pin by setting provided flags. The following flags are currently defined:
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.Bl -tag -offset indent -width ".Cm PULSE"
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.It Cm IN
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Input pin
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.It Cm OUT
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Output pin
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.It Cm OD
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Open drain pin
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.It Cm PP
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Push pull pin
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.It Cm TS
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Tristate pin
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.It Cm PU
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Pull-up pin
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.It Cm PD
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Pull-down pin
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.It Cm II
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Inverted input pin
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.It Cm IO
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Inverted output pin
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.El
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.It Fl f Ar ctldev
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GPIO controller device to use
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If not specified, defaults to
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.Pa /dev/gpioc0
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.It Fl l
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list available pins
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.It Fl t Ar pin
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toggle value of provided pin number
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.It Fl v
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be verbose: for each listed pin print current configuration
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.El
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.Sh EXAMPLES
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.Bl -bullet
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.It
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List pins available on GPIO controller defined by device /dev/gpioc0
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.Pp
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gpioctl -f /dev/gpioc0 -l
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.It
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Set the value of pin 12 to 1
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.Pp
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gpioctl -f /dev/gpioc0 12 1
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.It
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Configure pin 12 to be input pin
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.Pp
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gpioctl -f /dev/gpioc0 -c 12 IN
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.El
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.Sh SEE ALSO
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.Xr gpio 4
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.Sh HISTORY
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The
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.Nm
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utility appeared in
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.Fx 9.0 .
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.Sh AUTHORS
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.An -nosplit
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The
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.Nm
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utility and this manual page were written by
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.An Oleksandr Tymoshenko
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.Aq gonzo@freebsd.org
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