diff --git a/.gitmodules b/.gitmodules
index 6fecf58..4ce5b97 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -10,3 +10,6 @@
 [submodule "extra/u-boot"]
 	path = extra/u-boot
 	url = git://git.denx.de/u-boot.git
+[submodule "extra/u-boot-hardkernel"]
+	path = extra/u-boot-hardkernel
+	url = https://github.com/hardkernel/u-boot.git
diff --git a/extra/u-boot-hardkernel b/extra/u-boot-hardkernel
new file mode 160000
index 0000000..8a47b26
--- /dev/null
+++ b/extra/u-boot-hardkernel
@@ -0,0 +1 @@
+Subproject commit 8a47b2602ed2e348ed2a57dc2cd874c4605c538d