dts: xtensa: nxp_imx8m: Add PDM MICFIL node

This adds micfil node for NPX i.MX8MP SOC.

Signed-off-by: Daniel Baluta <[email protected]>

Author: dbaluta

boards/nxp/imx8mp_evk/imx8mp_evk-pinctrl.dtsi

@@ -21,6 +21,20 @@
 		};
 	};
 
+	pdm_default: pdm_default {
+		group0 {
+			pinmux = <&iomuxc_sai5_rxc_pdm_clk_pdm_clk>,
+				 <&iomuxc_sai5_rxd0_pdm_bit_stream_pdm_bit_stream0>,
+				 <&iomuxc_sai5_rxd1_pdm_bit_stream_pdm_bit_stream1>,
+				 <&iomuxc_sai5_rxd2_pdm_bit_stream_pdm_bit_stream2>,
+				 <&iomuxc_sai5_rxd3_pdm_bit_stream_pdm_bit_stream3>;
+			bias-pull-up;
+			slew-rate = "fast";
+			drive-strength = "x6";
+			input-schmitt-enable;
+		};
+	};
+
 	uart2_default: uart2_default {
 		group0 {
 			pinmux = <&iomuxc_uart2_rxd_uart_rx_uart2_rx>,

boards/nxp/imx8mp_evk/imx8mp_evk_mimx8ml8_adsp.dts

@@ -21,6 +21,11 @@
 	};
 };
 
+&micfil {
+	pinctrl-0 = <&pdm_default>;
+	pinctrl-names = "default";
+};
+
 &sai3 {
 	pinctrl-0 = <&sai3_default>;
 	pinctrl-names = "default";

dts/xtensa/nxp/nxp_imx8m.dtsi

@@ -113,6 +113,15 @@
 			status = "disabled";
 		};
 
+		micfil: micfil@30ca0000 {
+			compatible = "nxp,dai-micfil";
+			reg = <0x30ca0000 DT_SIZE_K(64)>;
+			dai-index = <2>;
+			dmas = <&sdma3 24 6>;
+			fifo-depth = <32>;
+			status = "disabled";
+		};
+
 		iomuxc: iomuxc@30330000 {
 			compatible = "nxp,imx-iomuxc";
 			reg = <0x30330000 DT_SIZE_K(64)>;