diff --git a/arch/arm/dts/r8a774c0.dtsi b/arch/arm/dts/r8a774c0.dtsi
index 151e32a..ad2e87b 100644
--- a/arch/arm/dts/r8a774c0.dtsi
+++ b/arch/arm/dts/r8a774c0.dtsi
@@ -49,17 +49,14 @@
 		opp-shared;
 		opp-800000000 {
 			opp-hz = /bits/ 64 <800000000>;
-			opp-microvolt = <820000>;
 			clock-latency-ns = <300000>;
 		};
 		opp-1000000000 {
 			opp-hz = /bits/ 64 <1000000000>;
-			opp-microvolt = <820000>;
 			clock-latency-ns = <300000>;
 		};
 		opp-1200000000 {
 			opp-hz = /bits/ 64 <1200000000>;
-			opp-microvolt = <820000>;
 			clock-latency-ns = <300000>;
 			opp-suspend;
 		};
@@ -1317,7 +1314,7 @@
 
 		rcar_sound: sound@ec500000 {
 			/*
-			 * #sound-dai-cells is required
+			 * #sound-dai-cells is required if simple-card
 			 *
 			 * Single DAI : #sound-dai-cells = <0>;	<&rcar_sound>;
 			 * Multi  DAI : #sound-dai-cells = <1>;	<&rcar_sound N>;
@@ -1707,8 +1704,8 @@
 				 <0x02000000 0 0xfe200000 0 0xfe200000 0 0x00200000>,
 				 <0x02000000 0 0x30000000 0 0x30000000 0 0x08000000>,
 				 <0x42000000 0 0x38000000 0 0x38000000 0 0x08000000>;
-			/* Map all possible DDR as inbound ranges */
-			dma-ranges = <0x42000000 0 0x40000000 0 0x40000000 0 0x40000000>;
+			/* Map all possible DDR/IOMMU as inbound ranges */
+			dma-ranges = <0x42000000 0 0x00000000 0 0x00000000 1 0x00000000>;
 			interrupts = <GIC_SPI 116 IRQ_TYPE_LEVEL_HIGH>,
 				     <GIC_SPI 117 IRQ_TYPE_LEVEL_HIGH>,
 				     <GIC_SPI 118 IRQ_TYPE_LEVEL_HIGH>;
@@ -1719,6 +1716,8 @@
 			clock-names = "pcie", "pcie_bus";
 			power-domains = <&sysc R8A774C0_PD_ALWAYS_ON>;
 			resets = <&cpg 319>;
+			iommu-map = <0 &ipmmu_hc 0 1>;
+			iommu-map-mask = <0>;
 			status = "disabled";
 		};