From: Shengjiu Wang <shengjiu.wang@nxp.com>
Date: Wed, 28 May 2025 01:58:37 +0000 (+0800)
Subject: arm64: dts: imx943-evk: Add PDM microphone sound card support
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=715dc11c78d8db5648e211e28b2cf5e9a80b90c5;p=users%2Fjedix%2Flinux-maple.git

arm64: dts: imx943-evk: Add PDM microphone sound card support

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@nxp.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
---

diff --git a/arch/arm64/boot/dts/freescale/imx943-evk.dts b/arch/arm64/boot/dts/freescale/imx943-evk.dts
index 85cec644dd926..c8c3eff9df1a2 100644
--- a/arch/arm64/boot/dts/freescale/imx943-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx943-evk.dts
@@ -29,6 +29,11 @@
 		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 @@
 		};
 	};
 
+	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 @@
 					gpio-hog;
 					output-high;
 				};
+
+				mqs-mic-sel-hog {
+					gpios = <11 GPIO_ACTIVE_HIGH>;
+					gpio-hog;
+					output-low;
+				};
 			};
 		};
 
@@ -314,6 +343,13 @@
 				#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 @@
 	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 @@
 		>;
 	};
 
+	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