make ARCH=arm CROSS_COMPILE=... embt2_defconfig

is your starting point, the resulting dtb is called omap4-epson-embt2ws.dtb

What works

• IMU in the glasses
• IMU in the constol
• Backlight
• buttons
• USB
• LED
• reading of various voltages (esp. VUSB, VBAT)
• WLAN
• Bluetooth (one command in the firmware from https://github.com/TI-ECS/bt-firmware/raw/master/TIInit_10.6.15.bts needs to be skipped)
• GPS (not mainlined)
• Sound (not mainlined)

WIP

• touchpad (reliability)
• display (requires some init remains from original system, so setup-bootchoice form an initrd stuff is required)

not started

• separate accelerometer