I had not gotten into details of the touchpad before this incident. When I found it was not a Synaptics touchpad, I got scared that I might not get a decent linux driver for it. Just about a month ago I was looking for a decent driver that supports Nvidia Optimus tecnology; but all my efforts were in vain.
As I started looking for a driver for my touchpad, I found out that the synaptics driver is not only for synaptics touchpads. So, I installed xf86-input-synaptics package. Tap for click started working as the default
/etc/X11/xorg.conf.d/10-synaptics.confhas the configuration for tap.
Option "TapButton1" "1"
Option "TapButton2" "2"
Option "TapButton3" "3"