37c0b6a091
This patch adds a "dtdiff" script to do a useful form diff of two device trees. This automatically converts the tree to dts form (if it's not already) and uses a new "-s" option in dtc to "sort" the tree. That is, it sorts the reserve entries, it sorts the properties within each node by name, and it sorts nodes by name within their parent. This gives a pretty sensible diff between the trees, which will ignore semantically null internal rearrangements (directly diffing the dts files can give a lot of noise due to the order changes). Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
38 lines
636 B
Bash
38 lines
636 B
Bash
#! /bin/bash
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# This script uses the bash <(...) extension.
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# If you want to change this to work with a generic /bin/sh, make sure
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# you fix that.
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DTC=dtc
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source_and_sort () {
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DT="$1"
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if [ -d "$DT" ]; then
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IFORMAT=fs
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elif [ -f "$DT" ]; then
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case "$DT" in
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*.dts)
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IFORMAT=dts
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;;
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*.dtb)
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IFORMAT=dtb
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;;
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esac
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fi
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if [ -z "$IFORMAT" ]; then
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echo "Unrecognized format for $DT" >&2
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exit 2
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fi
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$DTC -I $IFORMAT -O dts -qq -f -s -o - "$DT"
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}
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if [ $# != 2 ]; then
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echo "Usage: dtdiff <device tree> <device tree>" >&2
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exit 1
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fi
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diff -u <(source_and_sort "$1") <(source_and_sort "$2")
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