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 <[email protected]>
diff --git a/arch/arm64/boot/dts/freescale/imx8mp-beacon-kit.dts b/arch/arm64/boot/dts/freescale/imx8mp-beacon-kit.dts
index acd265d8b58e..ee64c6ffb551 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp-beacon-kit.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mp-beacon-kit.dts
@@ -49,6 +49,12 @@ ss_ep: endpoint {
};
};
+ dmic_codec: dmic-codec {
+ compatible = "dmic-codec";
+ num-channels = <1>;
+ #sound-dai-cells = <0>;
+ };
+
gpio-keys {
compatible = "gpio-keys";
autorepeat;
@@ -147,6 +153,22 @@ reg_usb1_host_vbus: regulator-usb1-vbus {
enable-active-high;
};
+ sound-dmic {
+ compatible = "simple-audio-card";
+ simple-audio-card,name = "sound-pdm";
+ simple-audio-card,format = "i2s";
+ 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";
@@ -174,6 +196,11 @@ simple-audio-card,codec {
};
};
+&audio_blk_ctrl {
+ assigned-clocks = <&clk IMX8MP_AUDIO_PLL1>, <&clk IMX8MP_AUDIO_PLL2>;
+ assigned-clock-rates = <393216000>, <135475200>;
+};
+
&ecspi2 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_ecspi2>;
@@ -364,6 +391,15 @@ hd3ss3220_out_ep: endpoint {
};
};
+&micfil {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_pdm>;
+ assigned-clocks = <&clk IMX8MP_CLK_PDM>;
+ assigned-clock-parents = <&clk IMX8MP_AUDIO_PLL1_OUT>;
+ assigned-clock-rates = <49152000>;
+ status = "okay";
+};
+
&pcie {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_pcie>;
@@ -545,6 +581,13 @@ MX8MP_IOMUXC_SAI2_RXFS__GPIO4_IO21 0x10 /* PCIe_nRST */
>;
};
+ pinctrl_pdm: pdmgrp {
+ fsl,pins = <
+ MX8MP_IOMUXC_SAI5_RXC__AUDIOMIX_PDM_CLK 0xd6
+ MX8MP_IOMUXC_SAI5_RXD0__AUDIOMIX_PDM_BIT_STREAM00 0xd6
+ >;
+ };
+
pinctrl_reg_usdhc2_vmmc: regusdhc2vmmcgrp {
fsl,pins = <
MX8MP_IOMUXC_SD2_RESET_B__GPIO2_IO19 0x40
--
2.39.2