[PATCH v2 6/6] arm64: dts: imx943-evk: Add PDM microphone sound card support

[Shengjiu Wang]

Add PDM micphone sound card support, configure the pinmux.

This sound card supports recording sound from PDM microphone and convert
the PDM format data to PCM data.

Signed-off-by: Shengjiu Wang <shengjiu.wang at nxp.com>
Reviewed-by: Frank Li <Frank.Li at nxp.com>
---
 arch/arm64/boot/dts/freescale/imx943-evk.dts | 60 ++++++++++++++++++++
 1 file changed, 60 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx943-evk.dts b/arch/arm64/boot/dts/freescale/imx943-evk.dts
index 85cec644dd92..c8c3eff9df1a 100644
--- a/arch/arm64/boot/dts/freescale/imx943-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx943-evk.dts
@@ -29,6 +29,11 @@ chosen {
 		stdout-path = &lpuart1;
 	};
 
+	dmic: dmic {
+		compatible = "dmic-codec";
+		#sound-dai-cells = <0>;
+	};
+
 	reg_usdhc2_vmmc: regulator-usdhc2 {
 		compatible = "regulator-fixed";
 		off-on-delay-us = <12000>;
@@ -83,6 +88,24 @@ btcpu: simple-audio-card,cpu {
 		};
 	};
 
+	sound-micfil {
+		compatible = "fsl,imx-audio-card";
+		model = "micfil-audio";
+
+		pri-dai-link {
+			format = "i2s";
+			link-name = "micfil hifi";
+
+			codec {
+				sound-dai = <&dmic>;
+			};
+
+			cpu {
+				sound-dai = <&micfil>;
+			};
+		};
+	};
+
 	sound-wm8962 {
 		compatible = "fsl,imx-audio-wm8962";
 		audio-codec = <&wm8962>;
@@ -204,6 +227,12 @@ audio-pwren-hog {
 					gpio-hog;
 					output-high;
 				};
+
+				mqs-mic-sel-hog {
+					gpios = <11 GPIO_ACTIVE_HIGH>;
+					gpio-hog;
+					output-low;
+				};
 			};
 		};
 
@@ -314,6 +343,13 @@ pcal6416_i2c6_u44: gpio at 20 {
 				#gpio-cells = <2>;
 				gpio-controller;
 
+				/* pdm selection */
+				can-pdm-sel-hog {
+					gpios = <12 GPIO_ACTIVE_HIGH>;
+					gpio-hog;
+					output-low;
+				};
+
 				sai3-sel-hog {
 					gpios = <11 GPIO_ACTIVE_HIGH>;
 					gpio-hog;
@@ -344,6 +380,22 @@ &lpuart1 {
 	status = "okay";
 };
 
+&micfil {
+	assigned-clocks = <&scmi_clk IMX94_CLK_AUDIOPLL1_VCO>,
+			  <&scmi_clk IMX94_CLK_AUDIOPLL2_VCO>,
+			  <&scmi_clk IMX94_CLK_AUDIOPLL1>,
+			  <&scmi_clk IMX94_CLK_AUDIOPLL2>,
+			  <&scmi_clk IMX94_CLK_PDM>;
+	assigned-clock-parents = <0>, <0>, <0>, <0>,
+				 <&scmi_clk IMX94_CLK_AUDIOPLL1>;
+	assigned-clock-rates = <3932160000>,
+			       <3612672000>, <393216000>,
+			       <361267200>, <49152000>;
+	pinctrl-0 = <&pinctrl_pdm>;
+	pinctrl-names = "default";
+	status = "okay";
+};
+
 &sai1 {
 	assigned-clocks = <&scmi_clk IMX94_CLK_AUDIOPLL1_VCO>,
 			  <&scmi_clk IMX94_CLK_AUDIOPLL2_VCO>,
@@ -413,6 +465,14 @@ IMX94_PAD_GPIO_IO28__LPI2C6_SCL		0x40000b9e
 		>;
 	};
 
+	pinctrl_pdm: pdmgrp {
+		fsl,pins = <
+			IMX94_PAD_PDM_CLK__PDM_CLK			0x31e
+			IMX94_PAD_PDM_BIT_STREAM0__PDM_BIT_STREAM0	0x31e
+			IMX94_PAD_PDM_BIT_STREAM1__PDM_BIT_STREAM1	0x31e
+		>;
+	};
+
 	pinctrl_sai1: sai1grp {
 		fsl,pins = <
 			IMX94_PAD_SAI1_TXFS__SAI1_TX_SYNC	0x31e
-- 
2.34.1