[PATCH] arm64: dts: imx8mp-ab2: Enable MU2 for DSP communication

[shengjiu . wang]

From: Shengjiu Wang <shengjiu.wang@xxxxxxx>

Enable the MU2 (Message Unit 2) node on the i.MX8MP Audio Board v2.
MU2 is required for inter-processor communication between the
application CPU and the HiFi4 DSP, allowing DSP firmware to exchange
control and status messages with the Linux host.

Without this change, the DSP driver cannot establish the message
channel and DSP audio processing is non-functional.

Fixes: bf68c18150efc ("arm64: dts: imx8mp-ab2: add support for NXP i.MX8MP audio board (version 2)")
Signed-off-by: Shengjiu Wang <shengjiu.wang@xxxxxxx>
---
 arch/arm64/boot/dts/freescale/imx8mp-ab2.dts | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mp-ab2.dts b/arch/arm64/boot/dts/freescale/imx8mp-ab2.dts
index 443e4fd5b9bf..285bf79864eb 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp-ab2.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mp-ab2.dts
@@ -775,6 +775,10 @@ &micfil {
 	status = "okay";
 };
 
+&mu2 {
+	status = "okay";
+};
+
 &pwm1 {
 	pinctrl-0 = <&pinctrl_pwm1>;
 	pinctrl-names = "default";
-- 
2.34.1