diff --git a/arch/arm64/boot/dts/renesas/r9a07g043u11-smarc.dts b/arch/arm64/boot/dts/renesas/r9a07g043u11-smarc.dts
index aaa29f83e84c..64370faf8f6d 100644
--- a/arch/arm64/boot/dts/renesas/r9a07g043u11-smarc.dts
+++ b/arch/arm64/boot/dts/renesas/r9a07g043u11-smarc.dts
@@ -8,6 +8,7 @@
 /dts-v1/;
 #include "r9a07g043.dtsi"
 #include "rzg2ul-smarc-som.dtsi"
+#include "rzg2ul-smarc-pinfunction.dtsi"
 #include "rz-smarc-common.dtsi"
 
 / {
@@ -73,11 +74,6 @@
 	status = "disabled";
 };
 
-&scif0 {
-	/delete-property/ pinctrl-0;
-	/delete-property/ pinctrl-names;
-};
-
 &sdhi1 {
 	/delete-property/ pinctrl-0;
 	/delete-property/ pinctrl-1;
diff --git a/arch/arm64/boot/dts/renesas/rzg2ul-smarc-pinfunction.dtsi b/arch/arm64/boot/dts/renesas/rzg2ul-smarc-pinfunction.dtsi
new file mode 100644
index 000000000000..2db9c92cf01f
--- /dev/null
+++ b/arch/arm64/boot/dts/renesas/rzg2ul-smarc-pinfunction.dtsi
@@ -0,0 +1,24 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+/*
+ * Device Tree Source for the RZ/G2UL SMARC pincontrol parts
+ *
+ * Copyright (C) 2022 Renesas Electronics Corp.
+ */
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/pinctrl/rzg2l-pinctrl.h>
+
+&pinctrl {
+	pinctrl-0 = <&sound_clk_pins>;
+	pinctrl-names = "default";
+
+	scif0_pins: scif0 {
+		pinmux = <RZG2L_PORT_PINMUX(6, 4, 6)>, /* TxD */
+			 <RZG2L_PORT_PINMUX(6, 3, 6)>; /* RxD */
+	};
+
+	sound_clk_pins: sound_clk {
+		pins = "AUDIO_CLK1", "AUDIO_CLK2";
+		input-enable;
+	};
+};