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niun/rpi-make-dt-blob.sh

Created October 24, 2014 14:33
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Create custom device tree blob to configure Raspberry Pi pins on early boot time
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rpi-make-dt-blob.sh
apt-get install device-tree-compiler
wget https://raw.githubusercontent.com/raspberrypi/documentation/master/configuration/images/dt-blob.dts
# for example, set P1:26 (BCM pin 7) to active low (on Raspi B Rev2.0, in dts file from August):
awk 'NR==104{print " pin@p7 { function = \"output\"; termination = \"pull_down\"; }; // SPI_CE1_N (P1:26)"}1' dt-blob.dts > dt-blob-mod.dts
dtc -I dts -O dtb -o /boot/dt-blob.bin dt-blob-mod.dts
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