From 4e6de4f0938de24f407b85b6328f5114103bd45a Mon Sep 17 00:00:00 2001 From: Daniel Golle Date: Wed, 17 Mar 2021 17:27:55 +0000 Subject: [PATCH] scripts/mkits.sh: add support for adding DT overlay blobs to image Allow adding multiple device tree overlay blobs to an image and generate configurations for each of them. This is useful on boards with modern U-Boot which allow e.g. user- configurable peripherals ("shields") in that way. Note that currently, each generated configuration adds exactly one overlay on top of the base image, ie. adding multiple overlays at the same time is not yet supported. Signed-off-by: Daniel Golle --- scripts/mkits.sh | 58 ++++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 56 insertions(+), 2 deletions(-) diff --git a/scripts/mkits.sh b/scripts/mkits.sh index e5369548d7..7533baf799 100755 --- a/scripts/mkits.sh +++ b/scripts/mkits.sh @@ -32,7 +32,9 @@ usage() { printf "\n\t-d ==> include Device Tree Blob 'dtb'" printf "\n\t-r ==> include RootFS blob 'rootfs'" printf "\n\t-H ==> specify hash algo instead of SHA1" - printf "\n\t-o ==> create output file 'its_file'\n" + printf "\n\t-o ==> create output file 'its_file'" + printf "\n\t-O ==> create config with dt overlay 'name:dtb'" + printf "\n\t\t(can be specified more than once)\n" exit 1 } @@ -41,8 +43,10 @@ ROOTFSNUM=1 INITRDNUM=1 HASH=sha1 LOADABLES= +DTOVERLAY= +DTADDR= -while getopts ":A:a:c:C:D:d:e:f:i:k:n:o:v:r:S" OPTION +while getopts ":A:a:c:C:D:d:e:f:i:k:n:o:O:v:r:S" OPTION do case $OPTION in A ) ARCH=$OPTARG;; @@ -57,6 +61,7 @@ do k ) KERNEL=$OPTARG;; n ) FDTNUM=$OPTARG;; o ) OUTPUT=$OPTARG;; + O ) DTOVERLAY="$DTOVERLAY ${OPTARG}";; r ) ROOTFS=$OPTARG;; S ) HASH=$OPTARG;; v ) VERSION=$OPTARG;; @@ -78,6 +83,11 @@ if [ -n "${COMPATIBLE}" ]; then COMPATIBLE_PROP="compatible = \"${COMPATIBLE}\";" fi +[ "$DTOVERLAY" ] && { + dtbsize=$(wc -c "$DTB" | cut -d' ' -f1) + DTADDR=$(printf "0x%08x" $(($LOAD_ADDR - $dtbsize)) ) +} + # Conditionally create fdt information if [ -n "${DTB}" ]; then FDT_NODE=" @@ -86,6 +96,7 @@ if [ -n "${DTB}" ]; then ${COMPATIBLE_PROP} data = /incbin/(\"${DTB}\"); type = \"flat_dt\"; + ${DTADDR:+load = <${DTADDR}>;} arch = \"${ARCH}\"; compression = \"none\"; hash@1 { @@ -141,6 +152,47 @@ if [ -n "${ROOTFS}" ]; then LOADABLES="${LOADABLES:+$LOADABLES, }\"rootfs-${ROOTFSNUM}\"" fi +# add DT overlay blobs +FDTOVERLAY_NODE="" +OVCONFIGS="" +[ "$DTOVERLAY" ] && for overlay in $DTOVERLAY ; do + overlay_blob=${overlay##*:} + ovname=${overlay%%:*} + ovnode="fdt-$ovname" + ovsize=$(wc -c "$overlay_blob" | cut -d' ' -f1) + echo "$ovname ($overlay_blob) : $ovsize" >&2 + DTADDR=$(printf "0x%08x" $(($DTADDR - $ovsize))) + FDTOVERLAY_NODE="$FDTOVERLAY_NODE + + $ovnode { + description = \"${ARCH_UPPER} OpenWrt ${DEVICE} device tree overlay $ovname\"; + ${COMPATIBLE_PROP} + data = /incbin/(\"${overlay_blob}\"); + type = \"flat_dt\"; + arch = \"${ARCH}\"; + load = <${DTADDR}>; + compression = \"none\"; + hash@1 { + algo = \"crc32\"; + }; + hash@2 { + algo = \"${HASH}\"; + }; + }; +" + OVCONFIGS="$OVCONFIGS + + config-$ovname { + description = \"OpenWrt ${DEVICE} with $ovname\"; + kernel = \"kernel-1\"; + fdt = \"fdt-$FDTNUM\", \"$ovnode\"; + ${LOADABLES:+loadables = ${LOADABLES};} + ${COMPATIBLE_PROP} + ${INITRD_PROP} + }; + " +done + # Create a default, fully populated DTS file DATA="/dts-v1/; @@ -167,6 +219,7 @@ DATA="/dts-v1/; }; ${INITRD_NODE} ${FDT_NODE} +${FDTOVERLAY_NODE} ${ROOTFS_NODE} }; @@ -180,6 +233,7 @@ ${ROOTFS_NODE} ${COMPATIBLE_PROP} ${INITRD_PROP} }; + ${OVCONFIGS} }; };" -- 2.30.2