TS-8390-49XX Touchscreen

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The touchscreen uses the TI ADS7843 resistive touch controller. The driver provides a /dev/input/event* device which evdev can use from X11 in the default distribution, or lower level apis like SDL or DirectFB can interact with directly. The default Yocto distribution ships with X11 calibration data already in /etc/pointercal or /usr/share/X11/xorg.conf.d/99-calibration.conf for other distributions.

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