The baseboard has a connector for a pulse density microphone.
This is connected via the micfil interface and uses the DMIC
audio codec with the simple-audio-card.
Signed-off-by: Adam Ford <aford173@xxxxxxxxx>
diff --git a/arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi
index 313e93663d6f..d0dd4c81a557 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi
@@ -6,6 +6,13 @@
#include <dt-bindings/phy/phy-imx8-pcie.h>
/ {
+
+ dmic_codec: dmic-codec {
+ compatible = "dmic-codec";
+ num-channels = <1>;
+ #sound-dai-cells = <0>;
+ };
+
leds {
compatible = "gpio-leds";
@@ -98,6 +105,22 @@ reg_usdhc2_vmmc: regulator-usdhc2 {
enable-active-high;
};
+ sound-dmic {
+ compatible = "simple-audio-card";
+ simple-audio-card,name = "dmic";
+ simple-audio-card,format = "pdm";
+ simple-audio-card,bitclock-master = <&dailink_master>;
+ simple-audio-card,frame-master = <&dailink_master>;
+
+ dailink_master: simple-audio-card,cpu {
+ sound-dai = <&micfil>;
+ };
+
+ simple-audio-card,codec {
+ sound-dai = <&dmic_codec>;
+ };
+ };
+
sound-wm8962 {
compatible = "simple-audio-card";
simple-audio-card,name = "wm8962";
@@ -228,6 +251,16 @@ pca6416_1: gpio@21 {
};
};
+&micfil {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_pdm>;
+ assigned-clocks = <&clk IMX8MM_CLK_PDM>;
+ assigned-clock-parents = <&clk IMX8MM_AUDIO_PLL1_OUT>;
+ assigned-clock-rates = <49152000>;
+ status = "okay";
+ #sound-dai-cells = <0>;
+};
+
&mipi_csi {
status = "okay";
ports {
@@ -365,6 +398,13 @@ MX8MM_IOMUXC_SAI2_MCLK_GPIO4_IO27 0x19
>;
};
+ pinctrl_pdm: pdmgrp {
+ fsl,pins = <
+ MX8MM_IOMUXC_SAI5_RXC_PDM_CLK 0xd6
+ MX8MM_IOMUXC_SAI5_RXD0_PDM_DATA0 0xd6
+ >;
+ };
+
pinctrl_reg_usb_otg1: usbotg1grp {
fsl,pins = <
MX8MM_IOMUXC_SAI3_RXC_GPIO4_IO29 0x19
--
2.39.2
