diff --git a/arch/arm64/boot/dts/renesas/r9a09g056.dtsi b/arch/arm64/boot/dts/renesas/r9a09g056.dtsi
index 8aee35bba3ff..8b7b25a4f1d4 100644
--- a/arch/arm64/boot/dts/renesas/r9a09g056.dtsi
+++ b/arch/arm64/boot/dts/renesas/r9a09g056.dtsi
@@ -177,6 +177,86 @@
 			resets = <&cpg 0x30>;
 		};
 
+		ostm0: timer@11800000 {
+			compatible = "renesas,r9a09g056-ostm", "renesas,ostm";
+			reg = <0x0 0x11800000 0x0 0x1000>;
+			interrupts = <GIC_SPI 17 IRQ_TYPE_EDGE_RISING>;
+			clocks = <&cpg CPG_MOD 0x43>;
+			resets = <&cpg 0x6d>;
+			power-domains = <&cpg>;
+			status = "disabled";
+		};
+
+		ostm1: timer@11801000 {
+			compatible = "renesas,r9a09g056-ostm", "renesas,ostm";
+			reg = <0x0 0x11801000 0x0 0x1000>;
+			interrupts = <GIC_SPI 18 IRQ_TYPE_EDGE_RISING>;
+			clocks = <&cpg CPG_MOD 0x44>;
+			resets = <&cpg 0x6e>;
+			power-domains = <&cpg>;
+			status = "disabled";
+		};
+
+		ostm2: timer@14000000 {
+			compatible = "renesas,r9a09g056-ostm", "renesas,ostm";
+			reg = <0x0 0x14000000 0x0 0x1000>;
+			interrupts = <GIC_SPI 19 IRQ_TYPE_EDGE_RISING>;
+			clocks = <&cpg CPG_MOD 0x45>;
+			resets = <&cpg 0x6f>;
+			power-domains = <&cpg>;
+			status = "disabled";
+		};
+
+		ostm3: timer@14001000 {
+			compatible = "renesas,r9a09g056-ostm", "renesas,ostm";
+			reg = <0x0 0x14001000 0x0 0x1000>;
+			interrupts = <GIC_SPI 20 IRQ_TYPE_EDGE_RISING>;
+			clocks = <&cpg CPG_MOD 0x46>;
+			resets = <&cpg 0x70>;
+			power-domains = <&cpg>;
+			status = "disabled";
+		};
+
+		ostm4: timer@12c00000 {
+			compatible = "renesas,r9a09g056-ostm", "renesas,ostm";
+			reg = <0x0 0x12c00000 0x0 0x1000>;
+			interrupts = <GIC_SPI 21 IRQ_TYPE_EDGE_RISING>;
+			clocks = <&cpg CPG_MOD 0x47>;
+			resets = <&cpg 0x71>;
+			power-domains = <&cpg>;
+			status = "disabled";
+		};
+
+		ostm5: timer@12c01000 {
+			compatible = "renesas,r9a09g056-ostm", "renesas,ostm";
+			reg = <0x0 0x12c01000 0x0 0x1000>;
+			interrupts = <GIC_SPI 22 IRQ_TYPE_EDGE_RISING>;
+			clocks = <&cpg CPG_MOD 0x48>;
+			resets = <&cpg 0x72>;
+			power-domains = <&cpg>;
+			status = "disabled";
+		};
+
+		ostm6: timer@12c02000 {
+			compatible = "renesas,r9a09g056-ostm", "renesas,ostm";
+			reg = <0x0 0x12c02000 0x0 0x1000>;
+			interrupts = <GIC_SPI 23 IRQ_TYPE_EDGE_RISING>;
+			clocks = <&cpg CPG_MOD 0x49>;
+			resets = <&cpg 0x73>;
+			power-domains = <&cpg>;
+			status = "disabled";
+		};
+
+		ostm7: timer@12c03000 {
+			compatible = "renesas,r9a09g056-ostm", "renesas,ostm";
+			reg = <0x0 0x12c03000 0x0 0x1000>;
+			interrupts = <GIC_SPI 24 IRQ_TYPE_EDGE_RISING>;
+			clocks = <&cpg CPG_MOD 0x4a>;
+			resets = <&cpg 0x74>;
+			power-domains = <&cpg>;
+			status = "disabled";
+		};
+
 		scif: serial@11c01400 {
 			compatible = "renesas,scif-r9a09g056",
 				     "renesas,scif-r9a09g057";