linux-kernel - [PATCH 2/3] arm64: dts: imx93-11x11-evk: Add PDM microphone sound card support

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Message-Id: <1721897948-6306-3-git-send-email-shengjiu.wang@nxp.com>
Date: Thu, 25 Jul 2024 16:59:07 +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 2/3] arm64: dts: imx93-11x11-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@....com>
---
 .../boot/dts/freescale/imx93-11x11-evk.dts    | 41 +++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx93-11x11-evk.dts b/arch/arm64/boot/dts/freescale/imx93-11x11-evk.dts
index 7ed75fb287df..7ad65469625f 100644
--- a/arch/arm64/boot/dts/freescale/imx93-11x11-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx93-11x11-evk.dts
@@ -104,6 +104,20 @@ simple-audio-card,codec {
 			sound-dai = <&bt_sco_codec 1>;
 		};
 	};
+
+	sound-micfil {
+		compatible = "fsl,imx-audio-card";
+		model = "micfil-audio";
+
+		pri-dai-link {
+			link-name = "micfil hifi";
+			format = "i2s";
+
+			cpu {
+				sound-dai = <&micfil>;
+			};
+		};
+	};
 };
 
 &adc1 {
@@ -361,6 +375,17 @@ &lpuart5 {
 	status = "okay";
 };
 
+&micfil {
+	#sound-dai-cells = <0>;
+	pinctrl-names = "default", "sleep";
+	pinctrl-0 = <&pinctrl_pdm>;
+	pinctrl-1 = <&pinctrl_pdm_sleep>;
+	assigned-clocks = <&clk IMX93_CLK_PDM>;
+	assigned-clock-parents = <&clk IMX93_CLK_AUDIO_PLL>;
+	assigned-clock-rates = <49152000>;
+	status = "okay";
+};
+
 &mu1 {
 	status = "okay";
 };
@@ -564,6 +589,22 @@ MX93_PAD_CCM_CLKO2__GPIO3_IO27			0x31e
 		>;
 	};
 
+	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_pdm_sleep: pdmgrpsleep {
+		fsl,pins = <
+			MX93_PAD_PDM_CLK__GPIO1_IO08			0x31e
+			MX93_PAD_PDM_BIT_STREAM0__GPIO1_IO09		0x31e
+			MX93_PAD_PDM_BIT_STREAM1__GPIO1_IO10		0x31e
+		>;
+	};
+
 	pinctrl_sai1: sai1grp {
 		fsl,pins = <
 			MX93_PAD_SAI1_TXC__SAI1_TX_BCLK			0x31e
-- 
2.34.1