Index: head/share/man/man4/ltc430x.4
===================================================================
--- head/share/man/man4/ltc430x.4	(revision 365057)
+++ head/share/man/man4/ltc430x.4	(revision 365058)
@@ -1,112 +1,116 @@
 .\"-
 .\" SPDX-License-Identifier: BSD-2-Clause
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 .\" Copyright (c) 2019 Ian Lepore <ian@freebsd.org>
 .\"
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 .\" $FreeBSD$
 .\"
-.Dd January 1, 2020
+.Dd September 1, 2020
 .Dt LTC430X 4
 .Os
 .Sh NAME
 .Nm ltc430x
 .Nd driver for LTC4305 and LTC4306 I2C mux chips
 .Sh SYNOPSIS
 To compile this driver into the kernel,
 place the following line in your
 kernel configuration file:
 .Bd -ragged -offset indent
 .Cd "device ltc430x"
 .Ed
 .Pp
 Alternatively, to load the driver as a
 module at boot time, place the following line in
 .Xr loader.conf 5 :
 .Bd -literal -offset indent
 ltc430x_load="YES"
 .Ed
 .Sh DESCRIPTION
 The
 .Nm
 driver supports the LTC4305 and LTC4306 I2C bus multiplexer (mux) chips.
 It automatically connects an upstream I2C bus to one of several downstream
 buses as needed when slave devices on the downstream buses initiate I/O.
 More information on the automatic switching behavior is available in
 .Xr iicmux 4 .
 .Sh FDT CONFIGURATION
 On an
 .Xr fdt 4
 based system, an
 .Nm
 device node is defined as a child node of its upstream i2c bus.
 The children of the
 .Nm
 node are additional i2c buses, which will have their own i2c slave
 devices described in their child nodes.
 .Pp
 The
 .Nm
 driver conforms to the standard
 .Bk -words
 .Li i2c/i2c-mux-ltc4306.txt
 .Ek
 bindings document, except that the following optional properties
 are not currently supported and will be ignored if present:
 .Bl -bullet -compact -inset -offset indent
 .It
 enable-gpios
 .It
 gpio-controller
 .It
 #gpio-cells
 .It
 ltc,downstream-accelerators-enable
 .It
 ltc,upstream-accelerators-enable
 .El
 .Sh HINTS CONFIGURATION
 On a
 .Xr device.hints 5
 based system, these values are configurable for
 .Nm :
 .Bl -tag -width indent
 .It Va hint.ltc430x.<unit>.at
 The upstream
 .Xr iicbus 4
 the
 .Nm
 instance is attached to.
+.It Va hint.ltc430x.<unit>.addr
+The slave address of the
+.Nm
+instance on the upstream bus.
 .El
 .Pp
 When configured via hints, the driver automatically adds an iicbus
 instance for every downstream bus supported by the chip.
 There is currently no way to indicate used versus unused channels.
 .Sh SEE ALSO
 .Xr iicbus 4 ,
 .Xr iicmux 4 ,
 .Sh HISTORY
 The
 .Nm
 driver first appeared in
 .Fx 13.0 .