diff --git a/.gitmodules b/.gitmodules
index 88c6abf..4959195 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -16,3 +16,12 @@
 [submodule "hdl"]
 	path = hdl
 	url = https://github.com/analogdevicesinc/hdl
+[submodule "firmware/buildroot"]
+	path = firmware/buildroot
+	url = https://github.com/analogdevicesinc/buildroot
+[submodule "firmware/linux"]
+	path = firmware/linux
+	url = https://github.com/analogdevicesinc/linux
+[submodule "firmware/u-boot-xlnx"]
+	path = firmware/u-boot-xlnx
+	url = https://github.com/analogdevicesinc/u-boot-xlnx
diff --git a/firmware/buildroot b/firmware/buildroot
new file mode 160000
index 0000000..f70f4af
--- /dev/null
+++ b/firmware/buildroot
@@ -0,0 +1 @@
+Subproject commit f70f4aff40bcc16e3d9a920984d034ad108f4993
diff --git a/firmware/linux b/firmware/linux
new file mode 160000
index 0000000..e14e351
--- /dev/null
+++ b/firmware/linux
@@ -0,0 +1 @@
+Subproject commit e14e351533f934047ba0473e836e561682ec67fe
diff --git a/firmware/u-boot-xlnx b/firmware/u-boot-xlnx
new file mode 160000
index 0000000..90401ce
--- /dev/null
+++ b/firmware/u-boot-xlnx
@@ -0,0 +1 @@
+Subproject commit 90401ce9ce029e5563f4dface63914d42badf5bc