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>
Reviewed-by: Daniel Baluta <daniel.baluta@nxp.com>
---
 arch/arm64/boot/dts/freescale/imx952-evk.dts | 54 ++++++++++++++++++++
 1 file changed, 54 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx952-evk.dts b/arch/arm64/boot/dts/freescale/imx952-evk.dts
index 2615fbb63145..62d1c1c7c501 100644
--- a/arch/arm64/boot/dts/freescale/imx952-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx952-evk.dts
@@ -52,6 +52,12 @@ chosen {
 		stdout-path = &lpuart1;
 	};
 
+	dmic: dmic {
+		compatible = "dmic-codec";
+		#sound-dai-cells = <0>;
+		num-channels = <2>;
+	};
+
 	memory@80000000 {
 		device_type = "memory";
 		reg = <0x0 0x80000000 0 0x80000000>;
@@ -164,6 +170,24 @@ 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-asrc = <&asrc1>;
@@ -411,6 +435,22 @@ &lpspi7 {
 	status = "okay";
 };
 
+&micfil {
+	assigned-clocks = <&scmi_clk IMX952_CLK_AUDIOPLL1_VCO>,
+			  <&scmi_clk IMX952_CLK_AUDIOPLL2_VCO>,
+			  <&scmi_clk IMX952_CLK_AUDIOPLL1>,
+			  <&scmi_clk IMX952_CLK_AUDIOPLL2>,
+			  <&scmi_clk IMX952_CLK_PDM>;
+	assigned-clock-parents = <0>, <0>, <0>, <0>,
+				<&scmi_clk IMX952_CLK_AUDIOPLL1>;
+	assigned-clock-rates = <3932160000>, <3612672000>,
+			       <393216000>, <361267200>, <49152000>;
+	pinctrl-0 = <&pinctrl_pdm>;
+	pinctrl-1 = <&pinctrl_pdm_sleep>;
+	pinctrl-names = "default", "sleep";
+	status = "okay";
+};
+
 &sai1 {
 	assigned-clocks = <&scmi_clk IMX952_CLK_AUDIOPLL1_VCO>,
 			  <&scmi_clk IMX952_CLK_AUDIOPLL2_VCO>,
@@ -604,6 +644,20 @@ IMX952_PAD_GPIO_IO36__WAKEUPMIX_TOP_GPIO5_IO_16		0x31e
 		>;
 	};
 
+	pinctrl_pdm: pdmgrp {
+		fsl,pins = <
+			IMX952_PAD_PDM_CLK__AONMIX_TOP_PDM_CLK				0x31e
+			IMX952_PAD_PDM_BIT_STREAM0__AONMIX_TOP_PDM_BIT_STREAM_0		0x31e
+		>;
+	};
+
+	pinctrl_pdm_sleep: pdmsleepgrp {
+		fsl,pins = <
+			IMX952_PAD_PDM_CLK__AONMIX_TOP_GPIO1_IO_8		0x31e
+			IMX952_PAD_PDM_BIT_STREAM0__AONMIX_TOP_GPIO1_IO_9	0x31e
+		>;
+	};
+
 	pinctrl_ptn5110: ptn5110grp {
 		fsl,pins = <
 			IMX952_PAD_GPIO_IO34__WAKEUPMIX_TOP_GPIO5_IO_14		     0x31e
-- 
2.34.1