linux-kernel - [PATCH 3/3] arm64: dts: imx93-9x9-qsb: Add PDM microphone sound card support

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Message-Id: <1725952772-30357-4-git-send-email-shengjiu.wang@nxp.com>
Date: Tue, 10 Sep 2024 15:19:32 +0800
From: Shengjiu Wang <shengjiu.wang@....com>
To: robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	shawnguo@...nel.org,
	s.hauer@...gutronix.de,
	kernel@...gutronix.de,
	festevam@...il.com,
	devicetree@...r.kernel.org,
	imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	shengjiu.wang@...il.com
Subject: [PATCH 3/3] arm64: dts: imx93-9x9-qsb: 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@....com>
---
 .../boot/dts/freescale/imx93-9x9-qsb.dts      | 35 +++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx93-9x9-qsb.dts b/arch/arm64/boot/dts/freescale/imx93-9x9-qsb.dts
index d213a5343803..1340f5462d11 100644
--- a/arch/arm64/boot/dts/freescale/imx93-9x9-qsb.dts
+++ b/arch/arm64/boot/dts/freescale/imx93-9x9-qsb.dts
@@ -122,6 +122,18 @@ simple-audio-card,codec {
 		};
 	};
 
+	sound-micfil {
+		compatible = "fsl,imx-audio-card";
+		model = "micfil-audio";
+		pri-dai-link {
+			link-name = "micfil hifi";
+			format = "i2s";
+			cpu {
+				sound-dai = <&micfil>;
+			};
+		};
+	};
+
 	sound-wm8962 {
 		compatible = "fsl,imx-audio-wm8962";
 		model = "wm8962-audio";
@@ -266,6 +278,12 @@ pcal6524: gpio@22 {
 		pinctrl-names = "default";
 		pinctrl-0 = <&pinctrl_pcal6524>;
 
+		mic-can-sel-hog {
+			gpio-hog;
+			gpios = <17 GPIO_ACTIVE_HIGH>;
+			output-low;
+		};
+
 		exp-sel-hog {
 			gpio-hog;
 			gpios = <22 GPIO_ACTIVE_HIGH>;
@@ -355,6 +373,15 @@ &lpuart1 { /* console */
 	status = "okay";
 };
 
+&micfil {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_pdm>;
+	assigned-clocks = <&clk IMX93_CLK_PDM>;
+	assigned-clock-parents = <&clk IMX93_CLK_AUDIO_PLL>;
+	assigned-clock-rates = <49152000>;
+	status = "okay";
+};
+
 &mu1 {
 	status = "okay";
 };
@@ -535,6 +562,14 @@ MX93_PAD_SD1_STROBE__USDHC1_STROBE	0x15fe
 		>;
 	};
 
+	pinctrl_pdm: pdmgrp {
+		fsl,pins = <
+			MX93_PAD_PDM_CLK__PDM_CLK			0x31e
+			MX93_PAD_PDM_BIT_STREAM0__PDM_BIT_STREAM00	0x31e
+			MX93_PAD_PDM_BIT_STREAM1__PDM_BIT_STREAM01	0x31e
+		>;
+	};
+
 	pinctrl_reg_usdhc2_vmmc: regusdhc2vmmcgrp {
 		fsl,pins = <
 			MX93_PAD_SD2_RESET_B__GPIO3_IO07	0x31e
-- 
2.34.1