freebsd-dev/sys/tools/fdt/make_dtbo.sh
Emmanuel Vadot c2f5940db3 Add dtb overlays support
DTB Overlays are useful to change/add nodes to a dtb without the need to
modify it.
Add support for building dtbo during buildkernel.
The goal of DTBO present in the FreeBSD source tree is to fill a gap in
time when we submit changes upstream (Linux). Instead of waiting 2 to 4 months
we can add a DTBO in tree in the meantime.
This is not for adding DTBO for capes/hat/addon boards, those will be
better to put in a ports.
This is also not for enabling a i2c/spi/pwm controller on certain pins,
each user have a different use case for those (which pins to use etc ...)
and we cannot have all possible configuration.

Add a dtbo for sun8i-h3-sid which add the SID node missing in upstream dts.

Reviewed by:	kevans
Differential Revision:	https://reviews.freebsd.org/D14782
2018-03-24 21:30:24 +00:00

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#!/bin/sh
#
# $FreeBSD$
# Script generates dtbo file ($3) from dtso source ($2) in build tree S ($1)
S=$1
dtso="$2"
dtbo_path=$3
if [ -z "$dtso" ]; then
echo "No DTS overlays specified"
exit 1
fi
if [ -z "${MACHINE}" ]; then
MACHINE=$(uname -m)
fi
: ${DTC:=dtc}
for d in ${dtso}; do
dtb=${dtbo_path}/`basename $d .dtso`.dtbo
echo "converting $d -> $dtb"
cpp -P -x assembler-with-cpp -I $S/gnu/dts/include -I $S/dts/${MACHINE} -I $S/gnu/dts/${MACHINE} -include $d /dev/null |
${DTC} -@ -O dtb -o $dtb -i $S/dts/${MACHINE} -i $S/gnu/dts/${MACHINE}
done