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+.\"	$OpenBSD: iosf.4,v 1.1 2023/04/23 00:44:44 dlg Exp $
+.\"
+.\" Copyright (c) 2023 David Gwynne <dlg@openbsd.org>
+.\"
+.\" 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: April 23 2023 $
+.Dt IOSF 4
+.Os
+.Sh NAME
+.Nm iosf
+.Nd Intel OnChip System Fabric device
+.Sh SYNOPSIS
+.Cd "iosf* at acpi?"
+.Cd "iosf* at pci?"
+.Sh DESCRIPTION
+The
+.Nm
+driver provides support routines for platforms using the
+Intel OnChip System Fabric.
+.Pp
+The
+.Xr dwiic 4
+driver uses the MailBox Interface (MBI) provided by
+.Nm
+to coordinate access to I2C devices.
+.Sh SEE ALSO
+.Xr acpi 4 ,
+.Xr dwiic 4 ,
+.Xr pci 4
+.Sh HISTORY
+The
+.Nm
+device driver first appeared in
+.Ox 7.4 .
+.Sh AUTHORS
+The
+.Nm
+driver was written by
+.An David Gwynne Aq Mt dlg@openbsd.org .