diff --git a/arch/arm/boot/dts/rk3308-voice-module-amic-mainboard-v10-aarch32.dts b/arch/arm/boot/dts/rk3308-voice-module-amic-mainboard-v10-aarch32.dts
index a05ecdb37d72..5dcc61371bc4 100644
--- a/arch/arm/boot/dts/rk3308-voice-module-amic-mainboard-v10-aarch32.dts
+++ b/arch/arm/boot/dts/rk3308-voice-module-amic-mainboard-v10-aarch32.dts
@@ -13,6 +13,11 @@
 	compatible = "rockchip,rk3308-voice-module-amic-mainboard-v10-aarch32", "rockchip,rk3308";
 };
 
+&acodec {
+	/* The grp1/2 (ADC3-6) keeps enabled always for VAD */
+	rockchip,en-always-grps = <1 2>;
+};
+
 &is31fl3236 {
 	reg = <0x3f>;
 };
diff --git a/arch/arm/boot/dts/rk3308-voice-module-board-v10-aarch32.dts b/arch/arm/boot/dts/rk3308-voice-module-board-v10-aarch32.dts
index 2efd960abf4b..4b96198a4615 100644
--- a/arch/arm/boot/dts/rk3308-voice-module-board-v10-aarch32.dts
+++ b/arch/arm/boot/dts/rk3308-voice-module-board-v10-aarch32.dts
@@ -27,4 +27,6 @@
 	rockchip,no-deep-low-power;
 	/* ADC5-6 for 2ch capture, loopback to ADC3-4 */
 	rockchip,adc-grps-route = <2 1 3 0>;
+	/* The grp2 (ADC5-6) keeps enabled always for VAD */
+	rockchip,en-always-grps = <2>;
 };