[PATCH v3 3/3] arm64: dts: imx8mp-evk: Add PDM micphone sound card support

Shengjiu Wang
2024-02-28T03:45:59Z

Add PDM micphone sound card support, configure the pinmux.

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

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
---
arch/arm64/boot/dts/freescale/imx8mp-evk.dts | 34 ++++++++++++++++++++
1 file changed, 34 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mp-evk.dts b/arch/arm64/boot/dts/freescale/imx8mp-evk.dts
index 0fc6c0d21cd6..97a3198f2b59 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mp-evk.dts
@@ -145,6 +145,20 @@ sound-hdmi {
hdmi-out;
};

+ sound-micfil {
+ compatible = "fsl,imx-audio-card";
+ model = "micfil-audio";
+
+ pri-dai-link {
+ link-name = "micfil hifi";
+ format = "i2s";
+
+ cpu {
+ sound-dai = <&micfil>;
+ };
+ };
+ };
+
reserved-memory {
#address-cells = <2>;
#size-cells = <2>;
@@ -526,6 +540,16 @@ &lcdif1 {
status = "okay";
};

+&micfil {
+ #sound-dai-cells = <0>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_pdm>;
+ assigned-clocks = <&clk IMX8MP_CLK_PDM>;
+ assigned-clock-parents = <&clk IMX8MP_AUDIO_PLL1_OUT>;
+ assigned-clock-rates = <196608000>;
+ status = "okay";
+};
+
&mipi_dsi {
samsung,esc-clock-frequency = <10000000>;
status = "okay";
@@ -792,6 +816,16 @@ MX8MP_IOMUXC_SD1_DATA4__GPIO2_IO06 0x40
>;
};

+ pinctrl_pdm: pdmgrp {
+ fsl,pins = <
+ MX8MP_IOMUXC_SAI5_RXC__AUDIOMIX_PDM_CLK 0xd6
+ MX8MP_IOMUXC_SAI5_RXD0__AUDIOMIX_PDM_BIT_STREAM00 0xd6
+ MX8MP_IOMUXC_SAI5_RXD1__AUDIOMIX_PDM_BIT_STREAM01 0xd6
+ MX8MP_IOMUXC_SAI5_RXD2__AUDIOMIX_PDM_BIT_STREAM02 0xd6
+ MX8MP_IOMUXC_SAI5_RXD3__AUDIOMIX_PDM_BIT_STREAM03 0xd6
+ >;
+ };
+
pinctrl_pmic: pmicgrp {
fsl,pins = <
MX8MP_IOMUXC_GPIO1_IO03__GPIO1_IO03 0x000001c0
--
2.34.1