arm64: dts: imx8mn-evk: Add PDM micphone sound card support

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>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

diff --git a/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi b/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi
index a0e13d3324ed1211720a2bae9a8b9bd242bd1727..269e70f66a1331da780422dd6d3eb1402560d3c8 100644 (file)
--- a/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi
@@ -110,6 +110,20 @@
                spdif-out;
                spdif-in;
        };
+
+       sound-micfil {
+               compatible = "fsl,imx-audio-card";
+               model = "micfil-audio";
+
+               pri-dai-link {
+                       link-name = "micfil hifi";
+                       format = "i2s";
+
+                       cpu {
+                               sound-dai = <&micfil>;
+                       };
+               };
+       };
 };
 
 &easrc {
@@ -285,6 +299,16 @@
        status = "okay";
 };
 
+&micfil {
+       #sound-dai-cells = <0>;
+       pinctrl-names = "default";
+       pinctrl-0 = <&pinctrl_pdm>;
+       assigned-clocks = <&clk IMX8MN_CLK_PDM>;
+       assigned-clock-parents = <&clk IMX8MN_AUDIO_PLL1_OUT>;
+       assigned-clock-rates = <196608000>;
+       status = "okay";
+};
+
 &mipi_csi {
        status = "okay";
 
@@ -522,6 +546,18 @@
                >;
        };
 
+       pinctrl_pdm: pdmgrp {
+               fsl,pins = <
+                       MX8MN_IOMUXC_SAI5_MCLK_SAI5_MCLK        0xd6
+                       MX8MN_IOMUXC_SAI5_RXC_PDM_CLK           0xd6
+                       MX8MN_IOMUXC_SAI5_RXFS_SAI5_RX_SYNC     0xd6
+                       MX8MN_IOMUXC_SAI5_RXD0_PDM_BIT_STREAM0  0xd6
+                       MX8MN_IOMUXC_SAI5_RXD1_PDM_BIT_STREAM1  0xd6
+                       MX8MN_IOMUXC_SAI5_RXD2_PDM_BIT_STREAM2  0xd6
+                       MX8MN_IOMUXC_SAI5_RXD3_PDM_BIT_STREAM3  0xd6
+               >;
+       };
+
        pinctrl_pmic: pmicirqgrp {
                fsl,pins = <
                        MX8MN_IOMUXC_GPIO1_IO03_GPIO1_IO3       0x141