evdev controls elantech buttons but not touchpad

[twobirdstone]

If at all possible, I want to use the kernel driver elantech and the xorg driver evdev to handle my elantech touchpad.

The system is a new gentoo build from min install cd
hw: samsung 300E5C laptop with both a usb mouse and a usbkeyboard attached
sw: gentoo 3.12.21 amd
Xorg 1.15.0

I'm only trying to configure Xorg right now (no window manager yet).

In the past, I've used a psmouse module and loaded it. However, evdev should drive the touchpad
if the kernel has the elantech driver built into it (my kernel does -see the makemenu.conf below).

My Questions:
1-How can I use the evdev driver to fully operate my elantech touchpad?

2-Is my understanding of how the Xorg and kernel drivers interact correct?
kernel driver (elantech) -> Xorg virtual pointer -> Xorg driver for kernel driver (evdev)

3-Is it legitimate that Xorg loads evdev twice for the _same_ touchpad?

Clues:
A) It seems Xorg 1.15.0 is loading the evdev driver for the Elantech Touchpad twice:

once as /dev/input/event7 -which appears to fully recognize all the Elantech capabilities
and once as /dev/input/mouse0 -which Xorg claims it has no declared drivers and ignores it.

B) xev shows the elantech buttons working but nothing for the touchpad
c) when I change the Driver "evdev" to "elantech", not even the buttons work in xev

Here is 10-evdev.conf from /usr/share/X11/xorg.conf.d (the only file in this directory):