linux-kernel - [PATCH 4/5] arm64: dts: imx91-11x11-evk: Add PDM microphone sound card support

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20251203070605.1868821-5-chancel.liu@nxp.com>
Date: Wed,  3 Dec 2025 16:06:04 +0900
From: Chancel Liu <chancel.liu@....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
Subject: [PATCH 4/5] arm64: dts: imx91-11x11-evk: Add PDM microphone sound card support

Add PDM micphone sound card support.

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

Signed-off-by: Chancel Liu <chancel.liu@....com>
---
 .../boot/dts/freescale/imx91-11x11-evk.dts    | 40 +++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx91-11x11-evk.dts b/arch/arm64/boot/dts/freescale/imx91-11x11-evk.dts
index a70a9af50ab7..605b1d10513a 100644
--- a/arch/arm64/boot/dts/freescale/imx91-11x11-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx91-11x11-evk.dts
@@ -117,6 +117,20 @@ btcpu: simple-audio-card,cpu {
 			dai-tdm-slot-width = <16>;
 		};
 	};
+
+	sound-micfil {
+		compatible = "fsl,imx-audio-card";
+		model = "micfil-audio";
+
+		pri-dai-link {
+			link-name = "micfil hifi";
+			format = "i2s";
+
+			cpu {
+				sound-dai = <&micfil>;
+			};
+		};
+	};
 };
 
 &adc1 {
@@ -412,6 +426,16 @@ bluetooth {
 	};
 };
 
+&micfil {
+	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";
+};
+
 &sai1 {
 	pinctrl-names = "default", "sleep";
 	pinctrl-0 = <&pinctrl_sai1>;
@@ -590,6 +614,22 @@ MX91_PAD_I2C2_SDA__LPI2C2_SDA                           0x40000b9e
 		>;
 	};
 
+	pinctrl_pdm: pdmgrp {
+		fsl,pins = <
+			MX91_PAD_PDM_CLK__PDM_CLK			0x31e
+			MX91_PAD_PDM_BIT_STREAM0__PDM_BIT_STREAM0	0x31e
+			MX91_PAD_PDM_BIT_STREAM1__PDM_BIT_STREAM1	0x31e
+		>;
+	};
+
+	pinctrl_pdm_sleep: pdmsleepgrp {
+		fsl,pins = <
+			MX91_PAD_PDM_CLK__GPIO1_IO8			0x51e
+			MX91_PAD_PDM_BIT_STREAM0__GPIO1_IO9		0x51e
+			MX91_PAD_PDM_BIT_STREAM1__GPIO1_IO10		0x51e
+		>;
+	};
+
 	pinctrl_sai1: sai1grp {
 		fsl,pins = <
 			MX91_PAD_SAI1_TXC__SAI1_TX_BCLK			0x31e
-- 
2.50.1