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Droid4's touchscreen can be used with mainline's maxtouch driver. The touchscreen's lower area is used for four soft buttons (KEY_MENU, KEY_HOME, KEY_BACK, KEY_SEARCH), but that does not seem to be currently supported by the mainline kernel. The mxt224 configuration can be saved with "mxt-app" for the kernel to load. It can be saved after the first boot with: # mxt-app -d i2c-dev:1-004a --save /lib/firmware/maxtouch.cfg Where the mxt-app can be found at: https://github.com/atmel-maxtouch/mxt-app The firmware for the droid 4 mxt224 comes with GPLv2 license in the Motorola Linux kernel sources. This firmware can be dumped out with "droid4-touchscreen-firmware" program at: https://github.com/tmlind/droid4-touchscreen-firmware The related LCD patches are still pending, but when merged, the touchscreen can be rotated in X with something like: # xrandr --output DSI-1 --rotate right # xinput set-prop 6 'Coordinate Transformation Matrix' \ 0 1 0 -1 0 1 0 0 1 For now, we rely on a gpio-hog but later on we can add the reset gpio handling to the driver and have it load the maxtouch.cfg and maxtouch.fw on boot. This patch is based on combined similar patches done by me and Sebastian. Signed-off-by: Sebastian Reichel <sre@kernel.org> Signed-off-by: Tony Lindgren <tony@atomide.com>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.