[PATCH v2 3/3] arm64: dts: imx93-9x9-qsb: Add PDM microphone sound card support

Shengjiu Wang
2024-09-12T02:25:55Z

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@nxp.com>
---
.../boot/dts/freescale/imx93-9x9-qsb.dts | 37 +++++++++++++++++++
1 file changed, 37 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx93-9x9-qsb.dts b/arch/arm64/boot/dts/freescale/imx93-9x9-qsb.dts
index f44300225656..72a0e0290a84 100644
--- a/arch/arm64/boot/dts/freescale/imx93-9x9-qsb.dts
+++ b/arch/arm64/boot/dts/freescale/imx93-9x9-qsb.dts
@@ -122,6 +122,20 @@ simple-audio-card,codec {
};
};

+ sound-micfil {
+ compatible = "fsl,imx-audio-card";
+ model = "micfil-audio";
+
+ pri-dai-link {
+ link-name = "micfil hifi";
+ format = "i2s";
+
+ cpu {
+ sound-dai = <&micfil>;
+ };
+ };
+ };
+
sound-wm8962 {
compatible = "fsl,imx-audio-wm8962";
model = "wm8962-audio";
@@ -271,6 +285,12 @@ exp-sel-hog {
gpios = <22 GPIO_ACTIVE_HIGH>;
output-low;
};
+
+ mic-can-sel-hog {
+ gpio-hog;
+ gpios = <17 GPIO_ACTIVE_HIGH>;
+ output-low;
+ };
};

pmic@25 {
@@ -355,6 +375,15 @@ &lpuart1 { /* console */
status = "okay";
};

+&micfil {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_pdm>;
+ assigned-clocks = <&clk IMX93_CLK_PDM>;
+ assigned-clock-parents = <&clk IMX93_CLK_AUDIO_PLL>;
+ assigned-clock-rates = <49152000>;
+ status = "okay";
+};
+
&mu1 {
status = "okay";
};
@@ -468,6 +497,14 @@ MX93_PAD_CCM_CLKO1__GPIO3_IO26 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_uart1: uart1grp {
fsl,pins = <
MX93_PAD_UART1_RXD__LPUART1_RX 0x31e
--
2.34.1