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

[Chancel Liu]

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 at nxp.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