diff --git a/Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml b/Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml
index 2223408e91a9..eed59ec00e78 100644
--- a/Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml
+++ b/Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml
@@ -79,6 +79,7 @@ properties:
           - mediatek,mt8192-m4u  # generation two
           - mediatek,mt8195-iommu-vdo        # generation two
           - mediatek,mt8195-iommu-vpp        # generation two
+          - mediatek,mt8195-iommu-infra      # generation two
 
       - description: mt7623 generation one
         items:
@@ -131,7 +132,6 @@ required:
   - compatible
   - reg
   - interrupts
-  - mediatek,larbs
   - '#iommu-cells'
 
 allOf:
@@ -163,6 +163,17 @@ allOf:
       required:
         - power-domains
 
+  - if: # The IOMMUs don't have larbs.
+      not:
+        properties:
+          compatible:
+            contains:
+              const: mediatek,mt8195-iommu-infra
+
+    then:
+      required:
+        - mediatek,larbs
+
 additionalProperties: false
 
 examples:
diff --git a/include/dt-bindings/memory/mt8195-memory-port.h b/include/dt-bindings/memory/mt8195-memory-port.h
index c10e8b61f1e8..70ba9f498eeb 100644
--- a/include/dt-bindings/memory/mt8195-memory-port.h
+++ b/include/dt-bindings/memory/mt8195-memory-port.h
@@ -387,4 +387,22 @@
 #define M4U_PORT_L28_CAM_DRZS4NO_R1		MTK_M4U_ID(28, 5)
 #define M4U_PORT_L28_CAM_TNCSO_R1		MTK_M4U_ID(28, 6)
 
+/* Infra iommu ports */
+/* PCIe1: read: BIT16; write BIT17. */
+#define IOMMU_PORT_INFRA_PCIE1			MTK_IFAIOMMU_PERI_ID(16)
+/* PCIe0: read: BIT18; write BIT19. */
+#define IOMMU_PORT_INFRA_PCIE0			MTK_IFAIOMMU_PERI_ID(18)
+#define IOMMU_PORT_INFRA_SSUSB_P3_R		MTK_IFAIOMMU_PERI_ID(20)
+#define IOMMU_PORT_INFRA_SSUSB_P3_W		MTK_IFAIOMMU_PERI_ID(21)
+#define IOMMU_PORT_INFRA_SSUSB_P2_R		MTK_IFAIOMMU_PERI_ID(22)
+#define IOMMU_PORT_INFRA_SSUSB_P2_W		MTK_IFAIOMMU_PERI_ID(23)
+#define IOMMU_PORT_INFRA_SSUSB_P1_1_R		MTK_IFAIOMMU_PERI_ID(24)
+#define IOMMU_PORT_INFRA_SSUSB_P1_1_W		MTK_IFAIOMMU_PERI_ID(25)
+#define IOMMU_PORT_INFRA_SSUSB_P1_0_R		MTK_IFAIOMMU_PERI_ID(26)
+#define IOMMU_PORT_INFRA_SSUSB_P1_0_W		MTK_IFAIOMMU_PERI_ID(27)
+#define IOMMU_PORT_INFRA_SSUSB2_R		MTK_IFAIOMMU_PERI_ID(28)
+#define IOMMU_PORT_INFRA_SSUSB2_W		MTK_IFAIOMMU_PERI_ID(29)
+#define IOMMU_PORT_INFRA_SSUSB_R		MTK_IFAIOMMU_PERI_ID(30)
+#define IOMMU_PORT_INFRA_SSUSB_W		MTK_IFAIOMMU_PERI_ID(31)
+
 #endif
diff --git a/include/dt-bindings/memory/mtk-memory-port.h b/include/dt-bindings/memory/mtk-memory-port.h
index 7d64103209af..2f68a0511a25 100644
--- a/include/dt-bindings/memory/mtk-memory-port.h
+++ b/include/dt-bindings/memory/mtk-memory-port.h
@@ -12,4 +12,6 @@
 #define MTK_M4U_TO_LARB(id)		(((id) >> 5) & 0x1f)
 #define MTK_M4U_TO_PORT(id)		((id) & 0x1f)
 
+#define MTK_IFAIOMMU_PERI_ID(port)	MTK_M4U_ID(0, port)
+
 #endif