grub: support loading devicetrees

srcpkgs/grub/patches/devicetree-loading.patch

@@ -0,0 +1,50 @@
+support loading a devicetree based on GRUB_DEFAULT_DTB in /etc/default/grub
+
+looks in /boot/dtbs/dtbs-${version}/${GRUB_DEFAULT_DTB}
+
+based on https://src.fedoraproject.org/rpms/grub2/blob/rawhide/f/0022-Add-devicetree-loading.patch
+
+--- a/util/grub-mkconfig.in
++++ b/util/grub-mkconfig.in
+@@ -255,7 +255,8 @@
+   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"
+--- a/util/grub.d/10_linux.in
++++ b/util/grub.d/10_linux.in
+@@ -129,6 +129,14 @@
+ 
+   echo "	insmod gzio" | sed "s/^/$submenu_indentation/"
+ 
++  if test -n "${dtb}" ; then
++    message="$(gettext_printf "Loading devicetree ...")"
++    sed "s/^/$submenu_indentation/" << EOF
++	echo	'$(echo "$message" | grub_quote)'
++	devicetree	${rel_dirname}/${dtb}
++EOF
++  fi
++
+   if [ x$dirname = x/ ]; then
+     if [ -z "${prepare_root_cache}" ]; then
+       prepare_root_cache="$(prepare_grub_to_access_device ${GRUB_DEVICE} | grub_add_tab)"
+@@ -250,6 +258,14 @@
+     gettext_printf "Found initrd image: %s\n" "$(echo $initrd_display)" >&2
+   fi
+ 
++  dtb=
++  for i in "dtbs-${version}" "dtbs-${alt_version}"; do
++    if test -f "${dirname}/dtbs/${i}/${GRUB_DEFAULT_DTB}" ; then
++      dtb="dtbs/${i}/${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

srcpkgs/grub/template

@@ -1,7 +1,7 @@
 # Template file for 'grub'
 pkgname=grub
 version=2.12
-revision=1
+revision=2
 hostmakedepends="python3 pkg-config flex freetype-devel font-unifont-bdf help2man
  automake gettext-devel-tools"
 makedepends="libusb-compat-devel ncurses-devel freetype-devel liblzma-devel