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Date:   Wed, 20 May 2020 09:03:48 +0800
From:   Shawn Guo <shawnguo@...nel.org>
To:     Adam Ford <aford173@...il.com>
Cc:     linux-arm-kernel@...ts.infradead.org, aford@...conemedded.com,
        Rob Herring <robh+dt@...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>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: imx8mm: Add support for micfil

On Sat, May 02, 2020 at 07:59:48AM -0500, Adam Ford wrote:
> The i.MX8M Mini has supports the MICFIL digital interface.
> It's a 16-bit audio signal from a PDM microphone bitstream.
> The driver is already in the kernel, but the node is missing.
> 
> This patch adds the micfil node.
> 
> Signed-off-by: Adam Ford <aford173@...il.com>
> 
> diff --git a/arch/arm64/boot/dts/freescale/imx8mm.dtsi b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
> index c63685ae80ee..d46e727fc362 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mm.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
> @@ -339,6 +339,25 @@ sai6: sai@...60000 {
>  				status = "disabled";
>  			};
>  
> +			micfil: micfil@...80000 {

Find a generic node name, audio-controller maybe?

Shawn

> +				compatible = "fsl,imx8mm-micfil";
> +				reg = <0x30080000 0x10000>;
> +				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 = <&clk IMX8MM_CLK_PDM_IPG>,
> +					 <&clk IMX8MM_CLK_PDM_ROOT>,
> +					 <&clk IMX8MM_AUDIO_PLL1_OUT>,
> +					 <&clk IMX8MM_AUDIO_PLL2_OUT>,
> +					 <&clk IMX8MM_CLK_EXT3>;
> +				clock-names = "ipg_clk", "ipg_clk_app",
> +					      "pll8k", "pll11k", "clkext3";
> +				dmas = <&sdma2 24 25 0x80000000>;
> +				dma-names = "rx";
> +				status = "disabled";
> +			};
> +
>  			gpio1: gpio@...00000 {
>  				compatible = "fsl,imx8mm-gpio", "fsl,imx35-gpio";
>  				reg = <0x30200000 0x10000>;
> -- 
> 2.25.1
> 

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