linux-kernel - Re: [PATCH V2 3/3] arm64: dts: imx8mp: Add micfil node

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Message-ID: <CAHCN7xK9TKuQshtdzY8-zFL-Ho5oGDjOQYo2gjsvTC3ooPvx9Q@mail.gmail.com>
Date:   Wed, 30 Aug 2023 17:41:31 -0500
From:   Adam Ford <aford173@...il.com>
To:     linux-arm-kernel@...ts.infradead.org
Cc:     aford@...conembedded.com, Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        Shengjiu Wang <shengjiu.wang@....com>,
        alsa-devel@...a-project.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH V2 3/3] arm64: dts: imx8mp: Add micfil node

On Sat, Aug 26, 2023 at 9:32 PM Adam Ford <aford173@...il.com> wrote:
>
> The i.MX8MP has a micfil controller which is used for interfacing
> with a pulse density microphone. Add the node and mark it as
> disabled by default.
>
> Signed-off-by: Adam Ford <aford173@...il.com>
> ---

Nak.  I guess I'll Nak myself.

> V2:  No Change
>
> diff --git a/arch/arm64/boot/dts/freescale/imx8mp.dtsi b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> index 79cdd4c066c8..b44851a2f579 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> @@ -1473,6 +1473,27 @@ easrc: easrc@...90000 {
>                                         fsl,asrc-format = <2>;
>                                         status = "disabled";
>                                 };
> +
> +                               micfil: audio-controller@...a0000 {
> +                                       compatible = "fsl,imx8mp-micfil";
> +                                       reg = <0x30ca0000 0x10000>;
> +                                       #sound-dai-cells = <0>;
> +                                       interrupts = <GIC_SPI 109 IRQ_TYPE_LEVEL_HIGH>,
> +                                                    <GIC_SPI 110 IRQ_TYPE_LEVEL_HIGH>,
> +                                                    <GIC_SPI 44 IRQ_TYPE_LEVEL_HIGH>,
> +                                                    <GIC_SPI 45 IRQ_TYPE_LEVEL_HIGH>;
> +                                       clocks = <&audio_blk_ctrl IMX8MP_CLK_AUDIOMIX_PDM_IPG>,
> +                                                <&audio_blk_ctrl IMX8MP_CLK_AUDIOMIX_PDM_ROOT>,

After a bunch of attempts to get this working on real hardware, it
turns out that IMX8MP_CLK_AUDIOMIX_PDM_ROOT doesn't really exist.  Its
real name is IMX8MP_CLK_AUDIOMIX_PDM_SEL.  I'll submit a patch to
remove this from imx8mp-clock.h and and a V3 of this series to update
the clock reference in this node.

> +                                                <&clk IMX8MP_AUDIO_PLL1_OUT>,
> +                                                <&clk IMX8MP_AUDIO_PLL2_OUT>,
> +                                                <&clk IMX8MP_CLK_EXT3>;
> +                                       clock-names = "ipg_clk", "ipg_clk_app",
> +                                                     "pll8k", "pll11k", "clkext3";
> +                                       dmas = <&sdma2 24 25 0x80000000>;
> +                                       dma-names = "rx";
> +                                       status = "disabled";
> +                               };
> +
>                         };
>
>                         sdma3: dma-controller@...00000 {
> --
> 2.39.2
>