.\"	$NetBSD: bcmgpio.4,v 1.3 2017/02/18 22:39:00 wiz Exp $
.\"
.\"Copyright (c) 2014 Frank Kardel
.\"All rights reserved.
.\"
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.\"modification, are permitted provided that the following conditions
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.\"   notice, this list of conditions and the following disclaimer.
.\"2. Redistributions in binary form must reproduce the above copyright
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.\"THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS
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.Dd February 17, 2017
.Dt BCMGPIO 4
.Os
.Sh NAME
.Nm bcmgpio
.Nd driver for BCM2835 onboard gpio
.Sh SYNOPSIS
.Cd "bcmgpio0 at obio?"
.Cd "bcmgpio1 at obio?"
.Cd "gpio* at gpiobus?"
.Sh DESCRIPTION
The
.Nm
driver supports up to two instances.
Access to the pins is provided by the
.Xr gpio 4
interface.
The
.Nm
.Ar unitnumber
argument selects the pin range.
Unit 0 covers GPIO pins 0 through 31 and unit 1 covers pins 32
through 53.
GPIO pins being used in alternate configurations are not available
for GPIO operations.
.Sh SEE ALSO
.Xr evbarm/intro 4 ,
.Xr gpio 4
.Sh HISTORY
The
.Nm
driver first appeared in
.Nx 7.0 .
.Sh AUTHORS
.An -nosplit
The
.Nm
driver was written by
.An Frank Kardel Aq Mt kardel@NetBSD.org .