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+.\"	$OpenBSD: leioc.4,v 1.1 2016/11/17 15:06:16 visa Exp $
+.\"
+.\" Copyright (c) 2016 Visa Hankala
+.\"
+.\" 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: November 17 2016 $
+.Dt LEIOC 4 loongson
+.Os
+.Sh NAME
+.Nm leioc
+.Nd Loongson 3A low-end IO controller
+.Sh SYNOPSIS
+.Cd "leioc* at mainbus0"
+.Cd "com* at leioc?"
+.Sh DESCRIPTION
+The
+.Nm
+driver supports the low-end IO controller present in Loongson 3A CPU packages.
+.Pp
+The controller provides several IO interfaces:
+.Pp
+.Bl -dash -compact -offset indent
+.It
+a conventional
+.Xr pci 4
+bus
+.It
+a Low Pin Count
+.Pq LPC
+bus
+.It
+a Serial Peripheral Interface
+.Pq SPI
+bus
+.It
+16
+.Xr gpio 4
+pins
+.It
+two
+.Xr com 4
+interfaces
+.El
+.Pp
+Currently, only the
+.Xr com 4
+interfaces are supported by the
+.Nm
+driver.
+.Sh SEE ALSO
+.Xr com 4 ,
+.Xr mainbus 4
+.Sh HISTORY
+The
+.Nm
+driver first appeared in
+.Ox 6.1 .