diff --git a/Documentation/devicetree/bindings/timer/renesas,rz-mtu3.yaml b/Documentation/devicetree/bindings/timer/renesas,rz-mtu3.yaml
index 3ad10c5b66ba..00cd5cbcf6e9 100644
--- a/Documentation/devicetree/bindings/timer/renesas,rz-mtu3.yaml
+++ b/Documentation/devicetree/bindings/timer/renesas,rz-mtu3.yaml
@@ -162,7 +162,6 @@ properties:
       - description: MTU8.TGRC input capture/compare match
       - description: MTU8.TGRD input capture/compare match
       - description: MTU8.TCNT overflow
-      - description: MTU8.TCNT underflow
 
   interrupt-names:
     items:
@@ -209,7 +208,6 @@ properties:
       - const: tgic8
       - const: tgid8
       - const: tciv8
-      - const: tciu8
 
   clocks:
     maxItems: 1
@@ -287,8 +285,7 @@ examples:
                    <GIC_SPI 209 IRQ_TYPE_EDGE_RISING>,
                    <GIC_SPI 210 IRQ_TYPE_EDGE_RISING>,
                    <GIC_SPI 211 IRQ_TYPE_EDGE_RISING>,
-                   <GIC_SPI 212 IRQ_TYPE_EDGE_RISING>,
-                   <GIC_SPI 213 IRQ_TYPE_EDGE_RISING>;
+                   <GIC_SPI 212 IRQ_TYPE_EDGE_RISING>;
       interrupt-names = "tgia0", "tgib0", "tgic0", "tgid0", "tciv0", "tgie0",
                         "tgif0",
                         "tgia1", "tgib1", "tciv1", "tciu1",
@@ -298,7 +295,7 @@ examples:
                         "tgiu5", "tgiv5", "tgiw5",
                         "tgia6", "tgib6", "tgic6", "tgid6", "tciv6",
                         "tgia7", "tgib7", "tgic7", "tgid7", "tciv7",
-                        "tgia8", "tgib8", "tgic8", "tgid8", "tciv8", "tciu8";
+                        "tgia8", "tgib8", "tgic8", "tgid8", "tciv8";
       clocks = <&cpg CPG_MOD R9A07G044_MTU_X_MCK_MTU3>;
       power-domains = <&cpg>;
       resets = <&cpg R9A07G044_MTU_X_PRESET_MTU3>;