linux-kernel - [PATCH v2 2/2] arm64: dts: imx8mp-evk: Add PDM micphone sound card support

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Message-Id: <1709017406-12624-2-git-send-email-shengjiu.wang@nxp.com>
Date: Tue, 27 Feb 2024 15:03:26 +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: imx8mp-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:
- none

 arch/arm64/boot/dts/freescale/imx8mp-evk.dts | 34 ++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mp-evk.dts b/arch/arm64/boot/dts/freescale/imx8mp-evk.dts
index 0fc6c0d21cd6..97a3198f2b59 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mp-evk.dts
@@ -145,6 +145,20 @@ sound-hdmi {
 		hdmi-out;
 	};
 
+	sound-micfil {
+		compatible = "fsl,imx-audio-card";
+		model = "micfil-audio";
+
+		pri-dai-link {
+			link-name = "micfil hifi";
+			format = "i2s";
+
+			cpu {
+				sound-dai = <&micfil>;
+			};
+		};
+	};
+
 	reserved-memory {
 		#address-cells = <2>;
 		#size-cells = <2>;
@@ -526,6 +540,16 @@ &lcdif1 {
 	status = "okay";
 };
 
+&micfil {
+	#sound-dai-cells = <0>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_pdm>;
+	assigned-clocks = <&clk IMX8MP_CLK_PDM>;
+	assigned-clock-parents = <&clk IMX8MP_AUDIO_PLL1_OUT>;
+	assigned-clock-rates = <196608000>;
+	status = "okay";
+};
+
 &mipi_dsi {
 	samsung,esc-clock-frequency = <10000000>;
 	status = "okay";
@@ -792,6 +816,16 @@ MX8MP_IOMUXC_SD1_DATA4__GPIO2_IO06	0x40
 		>;
 	};
 
+	pinctrl_pdm: pdmgrp {
+		fsl,pins = <
+			MX8MP_IOMUXC_SAI5_RXC__AUDIOMIX_PDM_CLK		0xd6
+			MX8MP_IOMUXC_SAI5_RXD0__AUDIOMIX_PDM_BIT_STREAM00	0xd6
+			MX8MP_IOMUXC_SAI5_RXD1__AUDIOMIX_PDM_BIT_STREAM01	0xd6
+			MX8MP_IOMUXC_SAI5_RXD2__AUDIOMIX_PDM_BIT_STREAM02	0xd6
+			MX8MP_IOMUXC_SAI5_RXD3__AUDIOMIX_PDM_BIT_STREAM03	0xd6
+		>;
+	};
+
 	pinctrl_pmic: pmicgrp {
 		fsl,pins = <
 			MX8MP_IOMUXC_GPIO1_IO03__GPIO1_IO03	0x000001c0
-- 
2.34.1