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 <[email protected]>
---
changes in v2:
- add newline between properties and child node
arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi | 36 +++++++++++++++++++
1 file changed, 36 insertions(+)
diff --git a/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi b/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi
index a0e13d3324ed..269e70f66a13 100644
--- a/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mn-evk.dtsi
@@ -110,6 +110,20 @@ sound-spdif {
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 @@ &isi {
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 @@ MX8MN_IOMUXC_I2C3_SDA_GPIO5_IO19 0x1c3
>;
};
+ 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
--
2.34.1