linux-kernel - Re: [PATCH v2] arm64: dts: imx8mp-msc-sm2s: Add sound card

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Message-ID: <20230527132149.GD560301@dragon>
Date:   Sat, 27 May 2023 21:21:49 +0800
From:   Shawn Guo <shawnguo@...nel.org>
To:     Luca Ceresoli <luca.ceresoli@...tlin.com>
Cc:     devicetree@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+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>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] arm64: dts: imx8mp-msc-sm2s: Add sound card

On Thu, May 25, 2023 at 12:47:55PM +0200, Luca Ceresoli wrote:
> The MSC SM2-MB-EP1 carrier board for the SM2S-IMX8PLUS SMARC module has an
> NXP SGTL5000 audio codec connected to I2S-0 (sai2).
> 
> This requires to:
> 
>  * add the power supplies (always on)
>  * enable sai2 with pinmuxes
>  * reparent the CLKOUT1 clock that feeds the codec SYS_MCLK to
>    IMX8MP_CLK_24M in order it to generate an accurate 24 MHz rate
> 
> Signed-off-by: Luca Ceresoli <luca.ceresoli@...tlin.com>
> 
> ---
> 
> Changed in v2:
> 
>  - switch to simple-audio-card
>  - fix typo in commit message
>  - no underscores in node names
>  - rename "sgtl5000-sound" node to "sound"
> ---
>  .../dts/freescale/imx8mp-msc-sm2s-ep1.dts     | 70 +++++++++++++++++++
>  1 file changed, 70 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/freescale/imx8mp-msc-sm2s-ep1.dts b/arch/arm64/boot/dts/freescale/imx8mp-msc-sm2s-ep1.dts
> index 470ff8e31e32..cd651e1e3262 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mp-msc-sm2s-ep1.dts
> +++ b/arch/arm64/boot/dts/freescale/imx8mp-msc-sm2s-ep1.dts
> @@ -14,6 +14,67 @@ / {
>  	compatible = "avnet,sm2s-imx8mp-14N0600E-ep1",
>  		     "avnet,sm2s-imx8mp-14N0600E", "avnet,sm2s-imx8mp",
>  		     "fsl,imx8mp";
> +
> +	reg_vcc_3v3_audio: 3v3-audio-regulator {
> +		compatible = "regulator-fixed";
> +		regulator-name = "VCC_3V3_AUD";
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +	};
> +
> +	reg_vcc_1v8_audio: 1v8-audio-regulator {
> +		compatible = "regulator-fixed";
> +		regulator-name = "VCC_1V8_AUD";
> +		regulator-min-microvolt = <1800000>;
> +		regulator-max-microvolt = <1800000>;
> +	};
> +
> +	sound {
> +		compatible = "simple-audio-card";
> +		simple-audio-card,name = "sgtl5000-audio";
> +		simple-audio-card,format = "i2s";
> +		simple-audio-card,frame-master = <&codec_dai>;
> +		simple-audio-card,bitclock-master = <&codec_dai>;
> +
> +		simple-audio-card,cpu {
> +			sound-dai = <&sai2>;
> +		};
> +
> +		codec_dai: simple-audio-card,codec {
> +			sound-dai = <&sgtl5000>;
> +		};
> +	};
> +};
> +
> +&i2c1 {
> +	sgtl5000: sgtl5000@a {

audio-codec for node name.

Shawn

> +		compatible = "fsl,sgtl5000";
> +		reg = <0x0a>;
> +
> +		assigned-clocks = <&clk IMX8MP_CLK_CLKOUT1_SEL>;
> +		assigned-clock-parents = <&clk IMX8MP_CLK_24M>;
> +		assigned-clock-rates = <24000000>;
> +		clocks = <&clk IMX8MP_CLK_CLKOUT1>;
> +		clock-names = "mclk";
> +		#sound-dai-cells = <0>;
> +
> +		VDDA-supply  = <&reg_vcc_3v3_audio>;
> +		VDDD-supply  = <&reg_vcc_1v8_audio>;
> +		VDDIO-supply = <&reg_vcc_1v8_audio>;
> +	};
> +};
> +
> +/* I2S-0 = sai2 */
> +&sai2 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_sai2>;
> +
> +	assigned-clocks = <&clk IMX8MP_CLK_SAI2>;
> +	assigned-clock-parents = <&clk IMX8MP_AUDIO_PLL1_OUT>;
> +	assigned-clock-rates = <12288000>;
> +
> +	fsl,sai-mclk-direction-output;
> +	status = "okay";
>  };
>  
>  &flexcan1 {
> @@ -32,6 +93,15 @@ &iomuxc {
>  	pinctrl-names = "default";
>  	pinctrl-0 = <&pinctrl_smarc_gpio>;
>  
> +	pinctrl_sai2: sai2grp {
> +		fsl,pins = <
> +			MX8MP_IOMUXC_SAI2_TXFS__AUDIOMIX_SAI2_TX_SYNC   0xd6
> +			MX8MP_IOMUXC_SAI2_TXC__AUDIOMIX_SAI2_TX_BCLK    0xd6
> +			MX8MP_IOMUXC_SAI2_RXD0__AUDIOMIX_SAI2_RX_DATA00 0xd6
> +			MX8MP_IOMUXC_SAI2_TXD0__AUDIOMIX_SAI2_TX_DATA00 0xd6
> +		>;
> +	};
> +
>  	pinctrl_smarc_gpio: smarcgpiosgrp {
>  		fsl,pins =
>  			<MX8MP_IOMUXC_GPIO1_IO11__GPIO1_IO11	0x19>, /* GPIO0 */
> 
> base-commit: efdde75fee54667153a5fa236907b55452fddbfa
> -- 
> 2.34.1
>