arm64: dts: meson-axg: s400: add pdm to the sound card

Enable the PDM input device on the S400 and it to the sound card
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

arch/arm64/boot/dts/amlogic/meson-axg-s400.dts

@@ -240,6 +240,9 @@ sound {
 				"TODDR_A IN 2", "TDMIN_C OUT",
 				"TODDR_B IN 2", "TDMIN_C OUT",
 				"TODDR_C IN 2", "TDMIN_C OUT",
+				"TODDR_A IN 4", "PDM Capture",
+				"TODDR_B IN 4", "PDM Capture",
+				"TODDR_C IN 4", "PDM Capture",
 				"TODDR_A IN 6", "TDMIN_LB OUT",
 				"TODDR_B IN 6", "TDMIN_LB OUT",
 				"TODDR_C IN 6", "TDMIN_LB OUT",
@@ -312,6 +315,14 @@ codec {
 				sound-dai = <&spdif_dit>;
 			};
 		};
+
+		dai-link@8 {
+			sound-dai = <&pdm>;
+
+			codec {
+				sound-dai = <&dmics>;
+			};
+		};
 	};
 
 	wifi32k: wifi32k {
@@ -394,6 +405,13 @@ gpio_speaker: gpio-controller@1f {
 	};
 };
 
+&pdm {
+	pinctrl-0 = <&pdm_dclk_a14_pins>, <&pdm_din0_pins>,
+		    <&pdm_din1_pins>, <&pdm_din2_pins>, <&pdm_din3_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+};
+
 &pwm_ab {
 	status = "okay";
 	pinctrl-0 = <&pwm_a_x20_pins>;