X-Git-Url: https://git.ozlabs.org/?a=blobdiff_plain;f=utils%2Fhooks%2F20-update-dtb-sample;fp=utils%2Fhooks%2F20-update-dtb-sample;h=44186a9e5745fe13554a535fd1fc356b140c9b3c;hb=ed6021ebefa8b56604cdbb23a1c38008ed88b8c7;hp=0000000000000000000000000000000000000000;hpb=aaa1de0046295cfd1f7a5428f399a5d1f9e1e563;p=petitboot

diff --git a/utils/hooks/20-update-dtb-sample b/utils/hooks/20-update-dtb-sample
new file mode 100644
index 0000000..44186a9
--- /dev/null
+++ b/utils/hooks/20-update-dtb-sample
@@ -0,0 +1,22 @@
+#!/bin/sh
+#
+# This is a sample boot hook to add a single property to the new kernel's
+# device tree.
+
+[ -z "$boot_dtb" ] && exit
+
+dtb_in=$boot_dtb
+dtb_out=$(mktemp)
+
+# Convert the dtb to dts, append our extra property, and convert back to dtb
+(
+	dtc -I dtb -O dts $dtb_in
+	echo '/ { petitboot,test = "test"; };'
+) | dtc -I dts -O dtb -o $dtb_out
+
+# If we have a good dtb (ie, the compile succeeded), replace the existing
+# dtb file.
+if [ $? = 0 ]
+then
+	mv $dtb_out $dtb_in
+fi