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tduszynski/debugfs_overlay
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Module allows userspace to apply some random Device Tree Overlay. Compilation =========== $ export ACH=arm $ export CROSS_COMPILE=arm-linux-gnueabihf- $ make -C ../linux M=$PWD Usage ===== # insmod debugfs_overlay.ko Once module is loaded it will create overlay directory under /sys/kernel/debug with dtb writable file inside. One applies specific overlay by writing it to dtb: # cat fragment.dtb > /sys/kernel/debug/overlay/dtb Writing some random bytes to dtb removes previously applied overlay: # echo "" > /sys/kernel/debug/overlay/dtb
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