[ften]

The Acer Iconia A500 uses a MXT1386 touch screen controller. Link

XDA links to source;
http://forum.xda-developers.com/showthread.php?t=1138636

I'm basis this lead off the following line in the Android kernel config;
CONFIG_TOUCHSCREEN_MXT1386_I2C=y

The driver is located in the source at;
/kernel/drviers/input/touchscreen/atmel_maxtouch.c

The source contains reference to maXTouch1386 i2c, so maybe it will help out.

 

[ften]

View attachment 2888 Strange... the /boot/config-2.6.xxxx from of my touchpad has this entry:

CONFIG_TOUCHSCREEN_CY8CTMA395=y

The config I was referencing was the config from the Android dump, not the standard Touchpad config. Although the Android config does have two touchscreen enable lines;
CONFIG_TOUCHSCREEN_CYPRESS_HP_I2C=y
CONFIG_TOUCHSCREEN_MXT1386_I2C=y

So Qualcomm could have just forgot to change the MXT1386 line or put it in for some other reason.