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charset="utf-8" From: Chancel Liu The board uses GPIO-controlled muxes to route shared signals between different functions. Add the audio-related mux states for: - selecting PDM or CAN1 - selecting SAI1 or M.2 - enabling the SAI1 audio path or not Signed-off-by: Chancel Liu --- .../boot/dts/freescale/imx91-9x9-qsb.dts | 49 +++++++++++++++++++ 1 file changed, 49 insertions(+) diff --git a/arch/arm64/boot/dts/freescale/imx91-9x9-qsb.dts b/arch/arm64/b= oot/dts/freescale/imx91-9x9-qsb.dts index ea8cf14e0bc6..4821ac312ab2 100644 --- a/arch/arm64/boot/dts/freescale/imx91-9x9-qsb.dts +++ b/arch/arm64/boot/dts/freescale/imx91-9x9-qsb.dts @@ -30,6 +30,55 @@ chosen { stdout-path =3D &lpuart1; }; =20 + can_mux: mux-controller-0 { + compatible =3D "gpio-mux"; + #mux-control-cells =3D <0>; + #mux-state-cells =3D <1>; + mux-gpios =3D <&pcal6524 17 GPIO_ACTIVE_HIGH>; + }; + + sai1_mux: mux-controller-1 { + compatible =3D "gpio-mux"; + #mux-control-cells =3D <0>; + #mux-state-cells =3D <1>; + mux-gpios =3D <&pcal6524 18 GPIO_ACTIVE_HIGH>; + }; + + sai1_en_mux: mux-controller-2 { + compatible =3D "gpio-mux"; + #mux-control-cells =3D <0>; + #mux-state-cells =3D <1>; + mux-gpios =3D <&pcal6524 9 GPIO_ACTIVE_HIGH>; + }; + + pinctrl-gpiomux { + compatible =3D "pinctrl-multiplexer"; + + can_fun: can-grp { + mux-states =3D <&can_mux 1>; + }; + + m2_fun: m2-grp { + mux-states =3D <&sai1_mux 1>; + }; + + pdm_fun: pdm-grp { + mux-states =3D <&can_mux 0>; + }; + + sai1_disable: sai1-disable-grp { + mux-states =3D <&sai1_en_mux 1>; + }; + + sai1_enable: sai1-enable-grp { + mux-states =3D <&sai1_en_mux 0>; + }; + + sai1_fun: sai1-grp { + mux-states =3D <&sai1_mux 0>; + }; + }; + reg_vref_1v8: regulator-adc-vref { compatible =3D "regulator-fixed"; regulator-name =3D "vref_1v8"; --=20 2.50.1 From nobody Sat Jul 25 22:32:28 2026 Received: from AM0PR83CU005.outbound.protection.outlook.com (mail-westeuropeazon11010008.outbound.protection.outlook.com [52.101.69.8]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1263C2E7F20; Mon, 13 Jul 2026 02:23:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; 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charset="utf-8" From: Chancel Liu Add WM8524 sound card support which connects to SAI1. Signed-off-by: Chancel Liu --- .../boot/dts/freescale/imx91-9x9-qsb.dts | 67 +++++++++++++++++++ 1 file changed, 67 insertions(+) diff --git a/arch/arm64/boot/dts/freescale/imx91-9x9-qsb.dts b/arch/arm64/b= oot/dts/freescale/imx91-9x9-qsb.dts index 4821ac312ab2..089d999196d6 100644 --- a/arch/arm64/boot/dts/freescale/imx91-9x9-qsb.dts +++ b/arch/arm64/boot/dts/freescale/imx91-9x9-qsb.dts @@ -30,6 +30,18 @@ chosen { stdout-path =3D &lpuart1; }; =20 + wm8524: audio-codec { + compatible =3D "wlf,wm8524"; + #sound-dai-cells =3D <0>; + wlf,mute-gpios =3D <&pcal6524 2 GPIO_ACTIVE_LOW>; + + port { + codec_ep: endpoint { + remote-endpoint =3D <&sai1_ep1>; + }; + }; + }; + can_mux: mux-controller-0 { compatible =3D "gpio-mux"; #mux-control-cells =3D <0>; @@ -110,6 +122,16 @@ linux,cma { linux,cma-default; }; }; + + sound-wm8524 { + compatible =3D "audio-graph-card2"; + label =3D "wm8524-audio"; + links =3D <&sai1_port1>; + widgets =3D "Line", "Line Out Jack"; + routing =3D + "Line Out Jack", "LINEVOUTL", + "Line Out Jack", "LINEVOUTR"; + }; }; =20 &adc1 { @@ -186,6 +208,15 @@ MX91_PAD_SD2_RESET_B__GPIO3_IO7 = 0x31e >; }; =20 + pinctrl_sai1: sai1grp { + fsl,pins =3D < + MX91_PAD_SAI1_TXC__SAI1_TX_BCLK 0x31e + MX91_PAD_SAI1_TXFS__SAI1_TX_SYNC 0x31e + MX91_PAD_SAI1_TXD0__SAI1_TX_DATA0 0x31e + MX91_PAD_SAI1_RXD0__SAI1_MCLK 0x31e + >; + }; + pinctrl_uart1: uart1grp { fsl,pins =3D < MX91_PAD_UART1_RXD__LPUART1_RX 0x31e @@ -433,6 +464,42 @@ &lpuart1 { status =3D "okay"; }; =20 +&sai1 { + #sound-dai-cells =3D <0>; + pinctrl-names =3D "default"; + pinctrl-0 =3D <&pinctrl_sai1>, <&sai1_fun>, <&sai1_enable>; + assigned-clocks =3D <&clk IMX93_CLK_SAI1>; + assigned-clock-parents =3D <&clk IMX93_CLK_AUDIO_PLL>; + assigned-clock-rates =3D <24576000>; + clocks =3D <&clk IMX93_CLK_SAI1_IPG>, <&clk IMX93_CLK_DUMMY>, + <&clk IMX93_CLK_SAI1_GATE>, <&clk IMX93_CLK_DUMMY>, + <&clk IMX93_CLK_DUMMY>, <&clk IMX93_CLK_AUDIO_PLL>; + clock-names =3D "bus", "mclk0", "mclk1", "mclk2", "mclk3", "pll8k"; + fsl,sai-mclk-direction-output; + status =3D "okay"; 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Mon, 13 Jul 2026 02:23:16 +0000 Received: from GVXPR04MB10021.eurprd04.prod.outlook.com ([fe80::d247:853:3e16:1994]) by GVXPR04MB10021.eurprd04.prod.outlook.com ([fe80::d247:853:3e16:1994%5]) with mapi id 15.21.0181.014; Mon, 13 Jul 2026 02:23:16 +0000 From: Chancel Liu To: robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, Frank.Li@nxp.com, s.hauer@pengutronix.de Cc: kernel@pengutronix.de, festevam@gmail.com, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org Subject: [PATCH v3 3/3] arm64: dts: imx91-9x9-qsb: Add PDM microphone sound card support Date: Mon, 13 Jul 2026 11:22:48 +0900 Message-ID: <20260713022248.1262123-4-chancel.liu@oss.nxp.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20260713022248.1262123-1-chancel.liu@oss.nxp.com> References: <20260713022248.1262123-1-chancel.liu@oss.nxp.com> Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: SL2P216CA0197.KORP216.PROD.OUTLOOK.COM (2603:1096:101:19::10) To GVXPR04MB10021.eurprd04.prod.outlook.com (2603:10a6:150:112::20) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: GVXPR04MB10021:EE_|DBBPR04MB7659:EE_ X-MS-Office365-Filtering-Correlation-Id: 8ceda386-fef6-41d7-dfa2-08dee085b259 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|1800799024|19092799006|23010399003|7416014|376014|18002099003|22082099003|56012099006|11063799006; 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charset="utf-8" From: Chancel Liu Add PDM microphone 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: Chancel Liu --- .../boot/dts/freescale/imx91-9x9-qsb.dts | 44 +++++++++++++++++++ 1 file changed, 44 insertions(+) diff --git a/arch/arm64/boot/dts/freescale/imx91-9x9-qsb.dts b/arch/arm64/b= oot/dts/freescale/imx91-9x9-qsb.dts index 089d999196d6..044b37fcc0ba 100644 --- a/arch/arm64/boot/dts/freescale/imx91-9x9-qsb.dts +++ b/arch/arm64/boot/dts/freescale/imx91-9x9-qsb.dts @@ -42,6 +42,18 @@ codec_ep: endpoint { }; }; =20 + dmic: dmic { + compatible =3D "dmic-codec"; + #sound-dai-cells =3D <0>; + num-channels =3D <4>; + + port { + dmic_ep: endpoint { + remote-endpoint =3D <&micfil_ep>; + }; + }; + }; + can_mux: mux-controller-0 { compatible =3D "gpio-mux"; #mux-control-cells =3D <0>; @@ -123,6 +135,12 @@ linux,cma { }; }; =20 + sound-micfil { + compatible =3D "audio-graph-card2"; + label =3D "micfil-audio"; + links =3D <&micfil_port>; + }; + sound-wm8524 { compatible =3D "audio-graph-card2"; label =3D "wm8524-audio"; @@ -202,6 +220,14 @@ MX91_PAD_CCM_CLKO1__GPIO3_IO26 = 0x31e >; }; =20 + pinctrl_pdm: pdmgrp { + fsl,pins =3D < + 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_reg_usdhc2_vmmc: regusdhc2vmmcgrp { fsl,pins =3D < MX91_PAD_SD2_RESET_B__GPIO3_IO7 0x31e @@ -464,6 +490,24 @@ &lpuart1 { status =3D "okay"; }; =20 +&micfil { + #sound-dai-cells =3D <0>; + pinctrl-names =3D "default"; + pinctrl-0 =3D <&pinctrl_pdm>, <&pdm_fun>; + assigned-clocks =3D <&clk IMX93_CLK_PDM>; + assigned-clock-parents =3D <&clk IMX93_CLK_AUDIO_PLL>; + assigned-clock-rates =3D <49152000>; + status =3D "okay"; + + micfil_port: port { + capture-only; + + micfil_ep: endpoint { + remote-endpoint =3D <&dmic_ep>; + }; + }; +}; + &sai1 { #sound-dai-cells =3D <0>; pinctrl-names =3D "default"; --=20 2.50.1