Index: share/man/man4/Makefile
===================================================================
--- share/man/man4/Makefile
+++ share/man/man4/Makefile
@@ -72,6 +72,7 @@
 	aue.4 \
 	${_aw_gpio.4} \
 	${_aw_mmc.4} \
+	${_aw_rsb.4} \
 	${_aw_rtc.4} \
 	axe.4 \
 	axge.4 \
@@ -596,6 +597,7 @@
 MLINKS+=ath_pci.4 if_ath_pci.4
 MLINKS+=an.4 if_an.4
 MLINKS+=aue.4 if_aue.4
+MLINKS+=${_aw_rsb.4} ${_aw_p2wi.4}
 MLINKS+=axe.4 if_axe.4
 MLINKS+=bce.4 if_bce.4
 MLINKS+=bfe.4 if_bfe.4
@@ -762,6 +764,8 @@
 .if ${MACHINE_CPUARCH} == "arm" || ${MACHINE_CPUARCH} == "aarch64"
 _aw_gpio.4=	aw_gpio.4
 _aw_mmc.4=	aw_mmc.4
+_aw_p2wi.4=	aw_p2wi.4
+_aw_rsb.4=	aw_rsb.4
 _aw_rtc.4=	aw_rtc.4
 .endif
 
Index: share/man/man4/aw_rsb.4
===================================================================
--- /dev/null
+++ share/man/man4/aw_rsb.4
@@ -0,0 +1,68 @@
+.\"-
+.\" Copyright (c) 2018 Emmanuel Vadot <manu@freebsd.org>
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\" $FreeBSD$
+.\"
+.Dd Jan 01, 2018
+.Dt AW_RSB 4
+.Os
+.Sh NAME
+.Nm aw_rsb
+.Nd driver for the Reduced Serial Bus/Push-Pull Two Wire Interface
+.Sh SYNOPSIS
+.Cd "device rsb"
+.Cd "device p2wi"
+.Sh DESCRIPTION
+The
+.Nm
+device driver provides support for either the RSB or P2WI interface present
+on Allwinner SoCs.
+RSB/P2WI is an interface similar to i2c developed and used by Allwinner.
+.Sh HARDWARE
+The current version of the
+.Nm
+driver supports SoCs with one of these compatible strings:
+.Pp
+.Bl -bullet -compact
+.It
+allwinner,sun6i-a31-p2wi
+.It
+allwinner,sun8i-a23-rsb
+.El
+.Sh SEE ALSO
+.Xr fdt 4 ,
+.Xr iicbus 4
+.Sh HISTORY
+The
+.Nm
+device driver first appeared in
+.Fx 11.0 .
+.Sh AUTHORS
+The
+.Nm
+device driver was written by
+.An Jared McNeill Aq Mt jmcneill@invisible.ca .
+This manual page was written by
+.An Emmanuel Vadot Aq Mt manu@freebsd.org .