[PATCH v2 1/3] arm64: dts: imx91-9x9-qsb: Add audio-related board muxes

[Chancel Liu <chancel.liu@oss.nxp.com>]

From: Chancel Liu <chancel.liu@nxp.com>

The board uses GPIO-controlled muxes to route shared signals between
different functions.

Add the audio-related mux states for:
- selecting PDM or CAN1
- selecting SAI1 or M.2
- enabling the SAI1 audio path or not

Signed-off-by: Chancel Liu <chancel.liu@nxp.com>
---
 .../boot/dts/freescale/imx91-9x9-qsb.dts      | 49 +++++++++++++++++++
 1 file changed, 49 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx91-9x9-qsb.dts b/arch/arm64/boot/dts/freescale/imx91-9x9-qsb.dts
index ea8cf14e0bc6..4821ac312ab2 100644
--- a/arch/arm64/boot/dts/freescale/imx91-9x9-qsb.dts
+++ b/arch/arm64/boot/dts/freescale/imx91-9x9-qsb.dts
@@ -30,6 +30,55 @@ chosen {
 		stdout-path = &lpuart1;
 	};
 
+	can_mux: mux-controller-0 {
+		compatible = "gpio-mux";
+		#mux-control-cells = <0>;
+		#mux-state-cells = <1>;
+		mux-gpios = <&pcal6524 17 GPIO_ACTIVE_HIGH>;
+	};
+
+	sai1_mux: mux-controller-1 {
+		compatible = "gpio-mux";
+		#mux-control-cells = <0>;
+		#mux-state-cells = <1>;
+		mux-gpios = <&pcal6524 18 GPIO_ACTIVE_HIGH>;
+	};
+
+	sai1_en_mux: mux-controller-2 {
+		compatible = "gpio-mux";
+		#mux-control-cells = <0>;
+		#mux-state-cells = <1>;
+		mux-gpios = <&pcal6524 9 GPIO_ACTIVE_HIGH>;
+	};
+
+	pinctrl-gpiomux {
+		compatible = "pinctrl-multiplexer";
+
+		can_fun: can-grp {
+			mux-states = <&can_mux 1>;
+		};
+
+		m2_fun: m2-grp {
+			mux-states = <&sai1_mux 1>;
+		};
+
+		pdm_fun: pdm-grp {
+			mux-states = <&can_mux 0>;
+		};
+
+		sai1_disable: sai1-disable-grp {
+			mux-states = <&sai1_en_mux 1>;
+		};
+
+		sai1_enable: sai1-enable-grp {
+			mux-states = <&sai1_en_mux 0>;
+		};
+
+		sai1_fun: sai1-grp {
+			mux-states = <&sai1_mux 0>;
+		};
+	};
+
 	reg_vref_1v8: regulator-adc-vref {
 		compatible = "regulator-fixed";
 		regulator-name = "vref_1v8";
-- 
2.50.1