diff --git a/src/mainboard/msi/ms7e56/Kconfig b/src/mainboard/msi/ms7e56/Kconfig
index 7c189b54bf..159894093c 100644
--- a/src/mainboard/msi/ms7e56/Kconfig
+++ b/src/mainboard/msi/ms7e56/Kconfig
@@ -82,4 +82,8 @@ config CPU_PT_ROM_MAP_GB
 config MRC_SETTINGS_CACHE_SIZE
 	default 0x1000000
 
+# Do not move this address. It has to match APCB.
+config ECAM_MMCONF_BASE_ADDRESS
+	default 0xe0000000
+
 endif # BOARD_MSI_PRO_B850_P
diff --git a/src/mainboard/msi/ms7e56/devicetree.cb b/src/mainboard/msi/ms7e56/devicetree.cb
index 1c087db9b4..8c75ca8747 100644
--- a/src/mainboard/msi/ms7e56/devicetree.cb
+++ b/src/mainboard/msi/ms7e56/devicetree.cb
@@ -332,7 +332,7 @@ chip soc/amd/phoenix
 				device pnp 4e.9 off end		# GPIO8-9, GPIO1-8 AF
 				device pnp 4e.a on		# ACPI
 					irq 0x70 = 0x40
-					# Vendor firmware did not assign I/O
+					io 0x60 = 0xa10
 				end
 				device pnp 4e.b on		# EC
 					io 0x60 = 0xa20