diff --git a/arch/arm64/boot/dts/renesas/r9a07g054.dtsi b/arch/arm64/boot/dts/renesas/r9a07g054.dtsi
index 1207a99bf3fed..50cb2f0e6e732 100644
--- a/arch/arm64/boot/dts/renesas/r9a07g054.dtsi
+++ b/arch/arm64/boot/dts/renesas/r9a07g054.dtsi
@@ -629,18 +629,36 @@
 		};
 
 		ostm0: timer@12801000 {
+			compatible = "renesas,r9a07g054-ostm",
+				     "renesas,ostm";
 			reg = <0x0 0x12801000 0x0 0x400>;
-			/* place holder */
+			interrupts = <GIC_SPI 46 IRQ_TYPE_EDGE_RISING>;
+			clocks = <&cpg CPG_MOD R9A07G054_OSTM0_PCLK>;
+			resets = <&cpg R9A07G054_OSTM0_PRESETZ>;
+			power-domains = <&cpg>;
+			status = "disabled";
 		};
 
 		ostm1: timer@12801400 {
+			compatible = "renesas,r9a07g054-ostm",
+				     "renesas,ostm";
 			reg = <0x0 0x12801400 0x0 0x400>;
-			/* place holder */
+			interrupts = <GIC_SPI 47 IRQ_TYPE_EDGE_RISING>;
+			clocks = <&cpg CPG_MOD R9A07G054_OSTM1_PCLK>;
+			resets = <&cpg R9A07G054_OSTM1_PRESETZ>;
+			power-domains = <&cpg>;
+			status = "disabled";
 		};
 
 		ostm2: timer@12801800 {
+			compatible = "renesas,r9a07g054-ostm",
+				     "renesas,ostm";
 			reg = <0x0 0x12801800 0x0 0x400>;
-			/* place holder */
+			interrupts = <GIC_SPI 48 IRQ_TYPE_EDGE_RISING>;
+			clocks = <&cpg CPG_MOD R9A07G054_OSTM2_PCLK>;
+			resets = <&cpg R9A07G054_OSTM2_PRESETZ>;
+			power-domains = <&cpg>;
+			status = "disabled";
 		};
 	};