Add devicetree loading

Signed-off-by: Peter Jones <pjones@redhat.com>

Switch to use APM Mustang device tree, for hardware testing.

Signed-off-by: David A. Marlin <d.marlin@redhat.com>

Use the default device tree from the grub default file

instead of hardcoding a value.

Signed-off-by: David A. Marlin <dmarlin@redhat.com>

util/grub-mkconfig.in

@@ -254,7 +254,8 @@ export GRUB_DEFAULT \
   GRUB_ENABLE_CRYPTODISK \
   GRUB_BADRAM \
   GRUB_OS_PROBER_SKIP_LIST \
-  GRUB_DISABLE_SUBMENU
+  GRUB_DISABLE_SUBMENU \
+  GRUB_DEFAULT_DTB
 
 if test "x${grub_cfg}" != "x"; then
   rm -f "${grub_cfg}.new"

util/grub.d/10_linux.in

@@ -153,6 +153,13 @@ EOF
     sed "s/^/$submenu_indentation/" << EOF
 	echo	'$(echo "$message" | grub_quote)'
 	initrd	$(echo $initrd_path)
+EOF
+  fi
+  if test -n "${fdt}" ; then
+    message="$(gettext_printf "Loading fdt ...")"
+    sed "s/^/$submenu_indentation/" << EOF
+	echo	'$(echo "$message" | grub_quote)'
+	devicetree	${rel_dirname}/${fdt}
 EOF
   fi
   sed "s/^/$submenu_indentation/" << EOF
@@ -236,6 +243,14 @@ while [ "x$list" != "x" ] ; do
     gettext_printf "Found initrd image: %s\n" "$(echo $initrd_display)" >&2
   fi
 
+  fdt=
+  for i in "dtb-${version}" "dtb-${alt_version}"; do
+    if test -f "${dirname}/${i}/${GRUB_DEFAULT_DTB}" ; then
+      fdt="${i}/${GRUB_DEFAULT_DTB}"
+      break
+    fi
+  done
+
   config=
   for i in "${dirname}/config-${version}" "${dirname}/config-${alt_version}" "/etc/kernels/kernel-config-${version}" ; do
     if test -e "${i}" ; then