freebsd-skq/usr.sbin/gpioctl/gpioctl.8

.\" 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. 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 June 6, 2018
.Dt GPIOCTL 8
.Os
.Sh NAME
.Nm gpioctl
.Nd GPIO control utility
.Sh SYNOPSIS
.Nm
.Op Fl f Ar ctldev
.Cm -l
.Op Fl v
.Nm
.Op Fl f Ar ctldev
.Op Fl pN
.Cm -t
.Ar pin
.Nm
.Op Fl f Ar ctldev
.Op Fl pN
.Cm -c
.Ar pin
.Ar flag
.Op flag ...
.Nm
.Op Fl f Ar ctldev
.Op Fl pN
.Cm -n
.Ar pin
.Ar pin-name
.Nm
.Op Cm -f Ar ctldev
.Op Fl pN
.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
.Pa pin
argument can either be a
.Pa pin-number
or a
.Pa pin-name .
If it is a number and a pin has this number as its name and you did not use
.Fl N
or
.Fl p
, then
.Nm
exits.
.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
If not specified, defaults to
.Pa /dev/gpioc0
.It Fl l
list available pins
.It Fl n Ar pin Ar pin-name
set the name used to describe the pin
.It Fl t Ar pin
toggle value of provided pin
.It Fl v
be verbose: for each listed pin print current configuration
.It Fl p
Force
.Pa pin
to be interpreted as a pin number
.It Fl N
Force
.Pa pin
to be interpreted as a pin name
.El
.Sh EXAMPLES
.Bl -bullet
.It
List pins available on GPIO controller defined by device /dev/gpioc0
.Pp
gpioctl -f /dev/gpioc0 -l
.It
Set the value of pin 12 to 1
.Pp
gpioctl -f /dev/gpioc0 12 1
.It
Configure pin 12 to be input pin
.Pp
gpioctl -f /dev/gpioc0 -c 12 IN
.It
Set the name of pin 12 to test
.Pp
gpioctl -f /dev/gpioc0 -n 12 test
.It
Toggle the value the pin named test
.Pp
gpioctl -f /dev/gpioc0 -t test
.It
Toggle the value of pin number 12 even if another pin has the name 12
.Pp
gpioctl -f /dev/gpioc0 -pt 12
.El
.Sh SEE ALSO
.Xr gpio 4 ,
.Xr gpioiic 4 ,
.Xr gpioled 4
.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 Mt gonzo@freebsd.org .