[PATCH v2 6/6] arm64: dts: imx943-evk: Add PDM microphone sound card support
Shengjiu Wang
shengjiu.wang at nxp.com
Tue May 27 18:58:37 PDT 2025
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 at nxp.com>
Reviewed-by: Frank Li <Frank.Li at nxp.com>
---
arch/arm64/boot/dts/freescale/imx943-evk.dts | 60 ++++++++++++++++++++
1 file changed, 60 insertions(+)
diff --git a/arch/arm64/boot/dts/freescale/imx943-evk.dts b/arch/arm64/boot/dts/freescale/imx943-evk.dts
index 85cec644dd92..c8c3eff9df1a 100644
--- a/arch/arm64/boot/dts/freescale/imx943-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx943-evk.dts
@@ -29,6 +29,11 @@ chosen {
stdout-path = &lpuart1;
};
+ dmic: dmic {
+ compatible = "dmic-codec";
+ #sound-dai-cells = <0>;
+ };
+
reg_usdhc2_vmmc: regulator-usdhc2 {
compatible = "regulator-fixed";
off-on-delay-us = <12000>;
@@ -83,6 +88,24 @@ btcpu: simple-audio-card,cpu {
};
};
+ sound-micfil {
+ compatible = "fsl,imx-audio-card";
+ model = "micfil-audio";
+
+ pri-dai-link {
+ format = "i2s";
+ link-name = "micfil hifi";
+
+ codec {
+ sound-dai = <&dmic>;
+ };
+
+ cpu {
+ sound-dai = <&micfil>;
+ };
+ };
+ };
+
sound-wm8962 {
compatible = "fsl,imx-audio-wm8962";
audio-codec = <&wm8962>;
@@ -204,6 +227,12 @@ audio-pwren-hog {
gpio-hog;
output-high;
};
+
+ mqs-mic-sel-hog {
+ gpios = <11 GPIO_ACTIVE_HIGH>;
+ gpio-hog;
+ output-low;
+ };
};
};
@@ -314,6 +343,13 @@ pcal6416_i2c6_u44: gpio at 20 {
#gpio-cells = <2>;
gpio-controller;
+ /* pdm selection */
+ can-pdm-sel-hog {
+ gpios = <12 GPIO_ACTIVE_HIGH>;
+ gpio-hog;
+ output-low;
+ };
+
sai3-sel-hog {
gpios = <11 GPIO_ACTIVE_HIGH>;
gpio-hog;
@@ -344,6 +380,22 @@ &lpuart1 {
status = "okay";
};
+&micfil {
+ assigned-clocks = <&scmi_clk IMX94_CLK_AUDIOPLL1_VCO>,
+ <&scmi_clk IMX94_CLK_AUDIOPLL2_VCO>,
+ <&scmi_clk IMX94_CLK_AUDIOPLL1>,
+ <&scmi_clk IMX94_CLK_AUDIOPLL2>,
+ <&scmi_clk IMX94_CLK_PDM>;
+ assigned-clock-parents = <0>, <0>, <0>, <0>,
+ <&scmi_clk IMX94_CLK_AUDIOPLL1>;
+ assigned-clock-rates = <3932160000>,
+ <3612672000>, <393216000>,
+ <361267200>, <49152000>;
+ pinctrl-0 = <&pinctrl_pdm>;
+ pinctrl-names = "default";
+ status = "okay";
+};
+
&sai1 {
assigned-clocks = <&scmi_clk IMX94_CLK_AUDIOPLL1_VCO>,
<&scmi_clk IMX94_CLK_AUDIOPLL2_VCO>,
@@ -413,6 +465,14 @@ IMX94_PAD_GPIO_IO28__LPI2C6_SCL 0x40000b9e
>;
};
+ pinctrl_pdm: pdmgrp {
+ fsl,pins = <
+ IMX94_PAD_PDM_CLK__PDM_CLK 0x31e
+ IMX94_PAD_PDM_BIT_STREAM0__PDM_BIT_STREAM0 0x31e
+ IMX94_PAD_PDM_BIT_STREAM1__PDM_BIT_STREAM1 0x31e
+ >;
+ };
+
pinctrl_sai1: sai1grp {
fsl,pins = <
IMX94_PAD_SAI1_TXFS__SAI1_TX_SYNC 0x31e
--
2.34.1
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