On Thu, Aug 31, 2023 at 6:51 AM Adam Ford <aford173@xxxxxxxxx> wrote: > > 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> > Shawn, I forgot to mention that this patch depends on a different patch that is found: https://patchwork.kernel.org/project/linux-arm-kernel/patch/20230831044431.250338-2-aford173@xxxxxxxxx/ Sorry about that. adam > 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 >
