linux-kernel - [PATCH v2 2/2] arm64: dts: imx8mn-evk: Add PDM micphone sound card support

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Date: Mon,  5 Feb 2024 10:04:24 +0800
From: Shengjiu Wang <shengjiu.wang@....com>
To: robh+dt@...nel.org,
	krzysztof.kozlowski+dt@...aro.org,
	conor+dt@...nel.org,
	shawnguo@...nel.org,
	s.hauer@...gutronix.de,
	kernel@...gutronix.de,
	festevam@...il.com,
	linux-imx@....com,
	devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Cc: shengjiu.wang@...il.com
Subject: [PATCH v2 2/2] arm64: dts: imx8mn-evk: Add PDM micphone sound card support

Add PDM micphone sound card support, configure the pinmux.

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

Signed-off-by: Shengjiu Wang <shengjiu.wang@....com>
---
changes in v2:
- add newline between properties and child node

 arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi | 36 +++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi b/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi
index a0e13d3324ed..269e70f66a13 100644
--- a/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi
@@ -110,6 +110,20 @@ sound-spdif {
 		spdif-out;
 		spdif-in;
 	};
+
+	sound-micfil {
+		compatible = "fsl,imx-audio-card";
+		model = "micfil-audio";
+
+		pri-dai-link {
+			link-name = "micfil hifi";
+			format = "i2s";
+
+			cpu {
+				sound-dai = <&micfil>;
+			};
+		};
+	};
 };
 
 &easrc {
@@ -285,6 +299,16 @@ &isi {
 	status = "okay";
 };
 
+&micfil {
+	#sound-dai-cells = <0>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_pdm>;
+	assigned-clocks = <&clk IMX8MN_CLK_PDM>;
+	assigned-clock-parents = <&clk IMX8MN_AUDIO_PLL1_OUT>;
+	assigned-clock-rates = <196608000>;
+	status = "okay";
+};
+
 &mipi_csi {
 	status = "okay";
 
@@ -522,6 +546,18 @@ MX8MN_IOMUXC_I2C3_SDA_GPIO5_IO19	0x1c3
 		>;
 	};
 
+	pinctrl_pdm: pdmgrp {
+		fsl,pins = <
+			MX8MN_IOMUXC_SAI5_MCLK_SAI5_MCLK	0xd6
+			MX8MN_IOMUXC_SAI5_RXC_PDM_CLK		0xd6
+			MX8MN_IOMUXC_SAI5_RXFS_SAI5_RX_SYNC	0xd6
+			MX8MN_IOMUXC_SAI5_RXD0_PDM_BIT_STREAM0	0xd6
+			MX8MN_IOMUXC_SAI5_RXD1_PDM_BIT_STREAM1	0xd6
+			MX8MN_IOMUXC_SAI5_RXD2_PDM_BIT_STREAM2	0xd6
+			MX8MN_IOMUXC_SAI5_RXD3_PDM_BIT_STREAM3	0xd6
+		>;
+	};
+
 	pinctrl_pmic: pmicirqgrp {
 		fsl,pins = <
 			MX8MN_IOMUXC_GPIO1_IO03_GPIO1_IO3	0x141
-- 
2.34.1