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+.\"	$OpenBSD: sxipio.4,v 1.1 2018/03/31 03:22:34 jsg Exp $
+.\"
+.\" Copyright (c) 2014 Raphael Graf <r@undefined.ch>
+.\"
+.\" Permission to use, copy, modify, and distribute this software for any
+.\" purpose with or without fee is hereby granted, provided that the above
+.\" copyright notice and this permission notice appear in all copies.
+.\"
+.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+.\"
+.Dd $Mdocdate: March 31 2018 $
+.Dt SXIPIO 4
+.Os
+.Sh NAME
+.Nm sxipio
+.Nd Allwinner GPIO controller
+.Sh SYNOPSIS
+.Cd "sxipio* at fdt? early 1"
+.Cd "gpio* at sxipio?"
+.Sh DESCRIPTION
+The
+.Nm
+driver provides support for the GPIO controller integrated in Allwinner
+Technology A10, A10s, A13, A20, A23, A33, A64, A80, GR8, H3, H5 and R40 SoCs.
+The devices have several ports for multi-functional pins which can be configured
+as either inputs or outputs, and accessed using
+.Xr gpioctl 8 .
+.\" Both values are made available through the
+.\" .Xr sysctl 8
+.\" interface.
+.Sh SEE ALSO
+.Xr gpio 4 ,
+.Xr gpioctl 8
+.Sh HISTORY
+The
+.Nm
+driver first appeared in
+.Ox 5.5 .