49 lines
1.4 KiB
Groff
49 lines
1.4 KiB
Groff
.\" $NetBSD: gpiosim.4,v 1.5 2014/03/18 18:20:39 riastradh Exp $
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.\"
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.\" Copyright (c) 2009, 2013 Marc Balmer <marc@msys.ch>
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.\" All rights reserved.
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.\"
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.\" Permission to use, copy, modify, and distribute this software for any
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.\" purpose with or without fee is hereby granted, provided that the above
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.\" copyright notice and this permission notice appear in all copies.
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.\"
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.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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.\"
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.Dd May 20, 2013
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.Dt GPIOSIM 4
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.Os
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.Sh NAME
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.Nm gpiosim
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.Nd General Purpose Input/Output Simulator
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.Sh SYNOPSIS
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.Cd "pseudo-device gpiosim"
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.Sh DESCRIPTION
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The
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.Nm
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pseudo-device simulates a 64-bit wide
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.Xr gpio 4
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device.
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The state of the simulated device can be manipulated through the
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.Xr sysctl 8
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interface.
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For this purpose, access the "hw.gpiosim\*[Lt]N\*[Gt].value"
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.Xr sysctl 8
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variable, where "\*[Lt]N\*[Gt]" denotes the number of the
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.Nm
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instance.
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.Sh SEE ALSO
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.Xr gpio 4 ,
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.Xr sysctl 8
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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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driver was written by
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.An Marc Balmer Aq Mt marc@msys.ch .
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