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do_deploy_append_raspberrypi4() {
# if ARMSTUB is set, it should be set in config.txt by earlier recipes, so replace it
if [ -n "${ARMSTUB}" ]; then
sed -i 's/^armstub=.*/armstub=bl31.bin/' ${DEPLOYDIR}/bcm2835-bootfiles/config.txt
if ! grep '^enable_gic' config.txt; then
sed -i 's/^enable_gic=.*/enable_gic=1/' ${DEPLOYDIR}/bcm2835-bootfiles/config.txt
else
echo "enable_gic=1" >> ${DEPLOYDIR}/bcm2835-bootfiles/config.txt
fi
# otherwise, set it
else
echo "# ARM stub configuration" >> ${DEPLOYDIR}/bcm2835-bootfiles/config.txt
echo "armstub=bl31.bin" >> ${DEPLOYDIR}/bcm2835-bootfiles/config.txt
echo "enable_gic=1" >> ${DEPLOYDIR}/bcm2835-bootfiles/config.txt
fi
sed -i -e "s#dtoverlay=mcp2515.*##g" ${DEPLOYDIR}/bcm2835-bootfiles/config.txt
echo "# Enable CAN (Waveshare RS485 CAN HAT)" >> ${DEPLOYDIR}/bcm2835-bootfiles/config.txt
echo "dtoverlay=mcp2515-can0,oscillator=8000000,interrupt=25,spimaxfrequency=1000000" >> ${DEPLOYDIR}/bcm2835-bootfiles/config.txt
}
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