[Arm-netbook] IC for analog and digital buttons (EOMA-68)

We are designing a handheld-game console (based on EOMA-68).

The problem is that EOMA-68 has very few GPIO.

We have 17 digital buttons, 2 analog joystick ( http://www.digikey.com/product-detail/en/254TA103B50B/254TA103B50B-ND/175591... ) and 2 analog triggers ( http://www.digikey.com/product-detail/en/EVA-W7NR04B34/P13569-ND/1135944 ).

Luke will use on the tablet the next IC: PCA9536.

However, this component does not meet our requirements.

Does anyone know a IC that meets these requirements (at least 17 digital buttons and at least 4 ADCs)?

Thanks.