Comment # 14 on bug 1030001 from Roger Whittaker

We may be in luck here with ic_type.

When the module gets loaded we see:

[ 2478.860692] elan_i2c i2c-ELAN0600:00: Elan Touchpad: Module ID: 0x004e
               Firmware: 0x0001
               Sample: 0x0003
               IAP: 0x0009
               Elan Touchpad Extra Information:
                   Max ABS X,Y:   2738,1791
                   Width X,Y:   152,149
                   Resolution X,Y:   31,31 (dots/mm)
                   ic type: 0x9
                   info pattern: 0x0

(Here I'm using the 1.6.3 version mentioned above in comment#9, not the version
in the current kernel.)

For product_id:

# find /sys | grep -i elan | grep product
/sys/devices/pci0000:00/INT3433:00/i2c-7/i2c-ELAN0600:00/input/input133/id/product
/sys/devices/pci0000:00/INT3433:00/i2c-7/i2c-ELAN0600:00/product_id

The first of these contains 004e and the second 78.0 so I'm assuming I need
0x4e in the code.