ietp(4): Driver for Elantech I2C touchpad

(cherry picked from commit d5add41d4d8713d48cfb8f8a228660c8b95ff676)

2 files changed, 82 insertions, 0 deletions

diff --git a/share/man/man4/Makefile b/share/man/man4/Makefile
index a1c6ade9bb69..0d0b016ac4e3 100644
--- a/share/man/man4/Makefile
+++ b/share/man/man4/Makefile
@@ -213,6 +213,7 @@ MAN=	aac.4 \
 	icmp.4 \
 	icmp6.4 \
 	ida.4 \
+	ietp.4 \
 	if_ipsec.4 \
 	iflib.4 \
 	ifmib.4 \
diff --git a/share/man/man4/ietp.4 b/share/man/man4/ietp.4
new file mode 100644
index 000000000000..f8dc33132609
--- /dev/null
+++ b/share/man/man4/ietp.4
@@ -0,0 +1,81 @@
+.\" Copyright (c) 2022 Vladimir Kondratyev <wulf@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 February 27, 2022
+.Dt IETP 4
+.Os
+.Sh NAME
+.Nm ietp
+.Nd Elantech I2C touchpad device driver
+.Sh SYNOPSIS
+To compile this driver into the kernel, place the following lines into
+your kernel configuration file:
+.Bd -ragged -offset indent
+.Cd "device ietp"
+.Cd "device hidbus"
+.Cd "device hid"
+.Cd "device iichid"
+.Cd "device iicbus"
+.Cd "device evdev"
+
+.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
+ietp_load="YES"
+.Ed
+.Sh DESCRIPTION
+The
+.Nm
+driver provides support for the Elantech I2C touchpad multi-touch devices
+found in many laptops.
+.Pp
+To get multi-touch device working in
+.Xr X 7 ,
+install
+.Pa ports/x11-drivers/xf86-input-libinput .
+.Sh FILES
+.Nm
+creates a pseudo-device file,
+.Pa /dev/input/eventX
+which presents the multi-touch device as an input event device.
+.Sh SEE ALSO
+.Xr hid 4 ,
+.Xr loader.conf 5 ,
+.Xr xorg.conf 5 Pq Pa ports/x11/xorg ,
+.Xr libinput 4 Pq Pa ports/x11-drivers/xf86-input-libinput .
+.Sh AUTHORS
+.An -nosplit
+The
+.Nm
+driver was written by
+.An Vladimir Kondratyev Aq Mt wulf@FreeBSD.org .
+.Sh BUGS
+.Nm
+cannot act like
+.Xr sysmouse 4