diff --git a/.gitmodules b/.gitmodules
index 044ac24e..aafb0f52 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -149,3 +149,9 @@
 [submodule "hw/mcu/raspberry_pi/Pico-PIO-USB"]
 	path = hw/mcu/raspberry_pi/Pico-PIO-USB
 	url = https://github.com/sekigon-gonnoc/Pico-PIO-USB.git
+[submodule "/home/ubuntu/tinyusb/hw/mcu/st/cmsis_device_u5"]
+	path = /home/ubuntu/tinyusb/hw/mcu/st/cmsis_device_u5
+	url = https://github.com/STMicroelectronics/cmsis_device_u5
+[submodule "/home/ubuntu/tinyusb/hw/mcu/st/stm32u5xx_hal_driver"]
+	path = /home/ubuntu/tinyusb/hw/mcu/st/stm32u5xx_hal_driver
+	url = https://github.com/STMicroelectronics/stm32u5xx_hal_driver
diff --git a/hw/mcu/st/cmsis_device_u5 b/hw/mcu/st/cmsis_device_u5
new file mode 160000
index 00000000..bc00f3c9
--- /dev/null
+++ b/hw/mcu/st/cmsis_device_u5
@@ -0,0 +1 @@
+Subproject commit bc00f3c9d8a4e25220f84c26d414902cc6bdf566
diff --git a/hw/mcu/st/stm32u5xx_hal_driver b/hw/mcu/st/stm32u5xx_hal_driver
new file mode 160000
index 00000000..2e1d4cdb
--- /dev/null
+++ b/hw/mcu/st/stm32u5xx_hal_driver
@@ -0,0 +1 @@
+Subproject commit 2e1d4cdb386e33391cb261dfff4fefa92e4aa35a