From 4e9d2d6a27c9a88aebda54ca9b2d3253bdc8145f Mon Sep 17 00:00:00 2001
From: John Klug <john.klug@multitech.com>
Date: Thu, 10 Mar 2022 15:22:30 -0600
Subject: Kernel image install from ipk

---
 recipes-kernel/linux/linux-at91_5.4.81.bb | 40 +++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/recipes-kernel/linux/linux-at91_5.4.81.bb b/recipes-kernel/linux/linux-at91_5.4.81.bb
index de29088..985dedf 100644
--- a/recipes-kernel/linux/linux-at91_5.4.81.bb
+++ b/recipes-kernel/linux/linux-at91_5.4.81.bb
@@ -274,3 +274,43 @@ KERNEL_MODULE_AUTOLOAD_mtre += " \
 	${NET_LOAD_ALL_MACHINES} \
 	${DRIVER_LOAD_ALL_MACHINES} \
 "
+
+# Never delete /boot, as it poisons the overlay
+# and you cannot get it back.
+pkg_preinst_kernel-image-uimage() {
+    set -x
+    if [ -d /boot ] ; then
+        cd /boot
+        rm -rf /boot/{*,.*} 2>/dev/null || true
+    else
+        mkdir -m 0755 /boot
+    fi
+    mkdir -m 0755 /var/volatile/boot 2>/dev/null || true
+    mount -o bind /var/volatile/boot /boot
+}
+
+pkg_prerm_kernel-image-uimage() {
+        umount -lf /boot || true
+        rm -rf /var/volatile/boot || true
+        rm -rf /boot/{*,.*} 2>/dev/null || true
+}
+
+PACKAGES =+ "kernel-image-uimage-inst"
+# Not sure how to get the name below generated automatically
+RDEPENDS_kernel-image-uimage-inst += "kernel-image-uimage-${PV}"
+ALLOW_EMPTY_kernel-image-uimage-inst = "1"
+
+pkg_postinst_kernel-image-uimage-inst() {
+	# Only installs all the kernel on the device (D is defined in bitbake)
+	if [[ -z "$D" ]] ; then
+	    logger -s -p user.info -t opkg "Upgrading kernel ${PV} -- poweroff will create an unbootable device"
+	    set -x
+	    kernel_mtd="/dev/$(cat /proc/mtd | grep '\"uImage\"' | cut -d : -f 1)"
+	    flash_erase ${kernel_mtd} 0 0
+	    if nandwrite -p ${kernel_mtd} /boot/uImage-${PV} ; then
+                echo 'Kernel image update is successful'
+            fi
+	    set +x
+	fi
+}
+
-- 
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