On Thu, 2015-07-23 at 12:57 +0200, Hanno Zulla wrote:

Hi there,

how can I help add support for the following device?

The "Motorola Smart Controller RZ100" is a combined telephony headset
and HID touchpad with four Android-specific buttons. It is designed 
to
work as a remote control for Motorola Android devices.

<https://motorola-global
-portal.custhelp.com/app/product_page/faqs/p/1422,7975,8227>

<http://www.amazon.com/Motorola-Bluetooth-Smart-Controller
-Android/dp/B0060EKFYG>

It is possible to pair this device with my Linux box, see the log 
output
below.

Using hid-recorder, the incoming events can be seen. But none of the
buttons or the touchpad are supported within my system.

How can I help adding this?

You could start with making the hid-recorder output available...

Cheers