diff --git a/platforms/cpus/nuvoton_npcx9.repl b/platforms/cpus/nuvoton_npcx9.repl
index 20cf2ba..718a007 100644
--- a/platforms/cpus/nuvoton_npcx9.repl
+++ b/platforms/cpus/nuvoton_npcx9.repl
@@ -160,6 +160,30 @@
 
 gpiof: GPIOPort.NPCX_GPIO @ sysbus 0x4009F000
 
+smbus0: I2C.NPCX_SMBus @ sysbus 0x40009000
+    IRQ -> nvic@13
+
+smbus1: I2C.NPCX_SMBus @ sysbus 0x4000B000
+    IRQ -> nvic@14
+
+smbus2: I2C.NPCX_SMBus @ sysbus 0x400C0000
+    IRQ -> nvic@36
+
+smbus3: I2C.NPCX_SMBus @ sysbus 0x400C2000
+    IRQ -> nvic@37
+
+smbus4: I2C.NPCX_SMBus @ sysbus 0x40008000
+    IRQ -> nvic@19
+
+smbus5: I2C.NPCX_SMBus @ sysbus 0x40017000
+    IRQ -> nvic@20
+
+smbus6: I2C.NPCX_SMBus @ sysbus 0x40018000
+    IRQ -> nvic@16
+
+smbus7: I2C.NPCX_SMBus @ sysbus 0x40019000
+    IRQ -> nvic@8
+
 // DEV_CTL4 register from the System Configuration peripheral
 // Its `Write-Protect Internal Flash` bit is used to force
 // write protection of the internal flash
diff --git a/src/Infrastructure b/src/Infrastructure
index b8587e4..39fab07 160000
--- a/src/Infrastructure
+++ b/src/Infrastructure
@@ -1 +1 @@
-Subproject commit b8587e49ca113f8d9d321bf5bceef5376f5578cb
+Subproject commit 39fab0786e6da658dd709f1691803e9274f6cea8