diff --git a/dts/riscv/rv32m1_ri5cy.dtsi b/dts/riscv/rv32m1_ri5cy.dtsi
index e02e9e54370..ac7b9d6bc80 100644
--- a/dts/riscv/rv32m1_ri5cy.dtsi
+++ b/dts/riscv/rv32m1_ri5cy.dtsi
@@ -93,17 +93,17 @@
 
 &lptmr0 {
 	interrupt-parent = <&intmux0_ch0>;
-	interrupts = <INTMUX_LEVEL2_IRQ(INTMUX_CH0, 7)>;
+	interrupts = <7>;
 };
 
 &lptmr1 {
 	interrupt-parent = <&intmux0_ch1>;
-	interrupts = <INTMUX_LEVEL2_IRQ(INTMUX_CH1, 8)>;
+	interrupts = <8>;
 };
 
 &lptmr2 {
 	interrupt-parent = <&intmux0_ch1>;
-	interrupts = <INTMUX_LEVEL2_IRQ(INTMUX_CH1, 22)>;
+	interrupts = <22>;
 };
 
 &gpioa {
@@ -113,22 +113,22 @@
 
 &gpiob {
 	interrupt-parent = <&intmux0_ch1>;
-	interrupts = <INTMUX_LEVEL2_IRQ(INTMUX_CH1, 15)>;
+	interrupts = <15>;
 };
 
 &gpioc {
 	interrupt-parent = <&intmux0_ch1>;
-	interrupts = <INTMUX_LEVEL2_IRQ(INTMUX_CH1, 16)>;
+	interrupts = <16>;
 };
 
 &gpiod {
 	interrupt-parent = <&intmux0_ch1>;
-	interrupts = <INTMUX_LEVEL2_IRQ(INTMUX_CH1, 17)>;
+	interrupts = <17>;
 };
 
 &gpioe {
 	interrupt-parent = <&intmux0_ch1>;
-	interrupts = <INTMUX_LEVEL2_IRQ(INTMUX_CH1, 27)>;
+	interrupts = <27>;
 };
 
 &uart0 {
@@ -138,17 +138,17 @@
 
 &uart1 {
 	interrupt-parent = <&intmux0_ch1>;
-	interrupts = <INTMUX_LEVEL2_IRQ(INTMUX_CH1, 13)>;
+	interrupts = <13>;
 };
 
 &uart2 {
 	interrupt-parent = <&intmux0_ch1>;
-	interrupts = <INTMUX_LEVEL2_IRQ(INTMUX_CH1, 14)>;
+	interrupts = <14>;
 };
 
 &uart3 {
 	interrupt-parent = <&intmux0_ch1>;
-	interrupts = <INTMUX_LEVEL2_IRQ(INTMUX_CH1, 26)>;
+	interrupts = <26>;
 };
 
 &i2c0 {
@@ -163,10 +163,10 @@
 
 &i2c2 {
 	interrupt-parent = <&intmux0_ch1>;
-	interrupts = <INTMUX_LEVEL2_IRQ(INTMUX_CH1, 11)>;
+	interrupts = <11>;
 };
 
 &i2c3 {
 	interrupt-parent = <&intmux0_ch1>;
-	interrupts = <INTMUX_LEVEL2_IRQ(INTMUX_CH1, 24)>;
+	interrupts = <24>;
 };
diff --git a/dts/riscv/rv32m1_zero_riscy.dtsi b/dts/riscv/rv32m1_zero_riscy.dtsi
index c8a8cd64f11..7af2929336a 100644
--- a/dts/riscv/rv32m1_zero_riscy.dtsi
+++ b/dts/riscv/rv32m1_zero_riscy.dtsi
@@ -92,12 +92,12 @@
 
 &lptmr0 {
 	interrupt-parent = <&intmux1_ch0>;
-	interrupts = <INTMUX_LEVEL2_IRQ(INTMUX_CH0, 6)>;
+	interrupts = <6>;
 };
 
 &lptmr1 {
 	interrupt-parent = <&intmux1_ch0>;
-	interrupts = <INTMUX_LEVEL2_IRQ(INTMUX_CH0, 7)>;
+	interrupts = <7>;
 };
 
 &lptmr2 {
@@ -107,22 +107,22 @@
 
 &gpioa {
 	interrupt-parent = <&intmux1_ch0>;
-	interrupts = <INTMUX_LEVEL2_IRQ(INTMUX_CH0, 25)>;
+	interrupts = <25>;
 };
 
 &gpiob {
 	interrupt-parent = <&intmux1_ch0>;
-	interrupts = <INTMUX_LEVEL2_IRQ(INTMUX_CH0, 26)>;
+	interrupts = <26>;
 };
 
 &gpioc {
 	interrupt-parent = <&intmux1_ch0>;
-	interrupts = <INTMUX_LEVEL2_IRQ(INTMUX_CH0, 27)>;
+	interrupts = <27>;
 };
 
 &gpiod {
 	interrupt-parent = <&intmux1_ch0>;
-	interrupts = <INTMUX_LEVEL2_IRQ(INTMUX_CH0, 28)>;
+	interrupts = <28>;
 };
 
 &gpioe {
@@ -132,17 +132,17 @@
 
 &uart0 {
 	interrupt-parent = <&intmux1_ch0>;
-	interrupts = <INTMUX_LEVEL2_IRQ(INTMUX_CH0, 21)>;
+	interrupts = <21>;
 };
 
 &uart1 {
 	interrupt-parent = <&intmux1_ch0>;
-	interrupts = <INTMUX_LEVEL2_IRQ(INTMUX_CH0, 22)>;
+	interrupts = <22>;
 };
 
 &uart2 {
 	interrupt-parent = <&intmux1_ch0>;
-	interrupts = <INTMUX_LEVEL2_IRQ(INTMUX_CH0, 23)>;
+	interrupts = <23>;
 };
 
 &uart3 {
@@ -152,17 +152,17 @@
 
 &i2c0 {
 	interrupt-parent = <&intmux1_ch0>;
-	interrupts = <INTMUX_LEVEL2_IRQ(INTMUX_CH0, 13)>;
+	interrupts = <13>;
 };
 
 &i2c1 {
 	interrupt-parent = <&intmux1_ch0>;
-	interrupts = <INTMUX_LEVEL2_IRQ(INTMUX_CH0, 14)>;
+	interrupts = <14>;
 };
 
 &i2c2 {
 	interrupt-parent = <&intmux1_ch0>;
-	interrupts = <INTMUX_LEVEL2_IRQ(INTMUX_CH0, 15)>;
+	interrupts = <15>;
 };
 
 &i2c3 {
diff --git a/include/dt-bindings/interrupt-controller/openisa-intmux.h b/include/dt-bindings/interrupt-controller/openisa-intmux.h
index 7ac9957c923..222ffe0043d 100644
--- a/include/dt-bindings/interrupt-controller/openisa-intmux.h
+++ b/include/dt-bindings/interrupt-controller/openisa-intmux.h
@@ -7,19 +7,6 @@
 #ifndef ZEPHYR_INCLUDE_DT_BINDINGS_INTERRUPT_CONTROLLER_OPENISA_INTMUX_H_
 #define ZEPHYR_INCLUDE_DT_BINDINGS_INTERRUPT_CONTROLLER_OPENISA_INTMUX_H_
 
-/*
- * Symbols for intmux channels, for DT readability when using
- * INTMUX_LEVEL2_IRQ().
- */
-#define INTMUX_CH0 0
-#define INTMUX_CH1 1
-#define INTMUX_CH2 2
-#define INTMUX_CH3 3
-#define INTMUX_CH4 4
-#define INTMUX_CH5 5
-#define INTMUX_CH6 6
-#define INTMUX_CH7 7
-
 /*
  * Level 1 IRQ offsets for each INTMUX channel.
  */
@@ -32,12 +19,4 @@
 #define INTMUX_CH6_IRQ 30
 #define INTMUX_CH7_IRQ 31
 
-/*
- * Multi-level IRQ number for a INTMUX channel/line interrupt.
- *
- * See gen_isr_tables.py for details.
- */
-#define INTMUX_LEVEL2_IRQ(channel, line) \
-	((((line) + 1) << 8) | ((channel) + INTMUX_CH0_IRQ))
-
 #endif