linux-kernel - Re: [PATCH v2 2/2] arm64: dts: imx8mm-evk: Enable audio codec wm8524

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Message-ID: <20190423051738.tmyto7nvm4w5zt4r@pengutronix.de>
Date:   Tue, 23 Apr 2019 07:17:38 +0200
From:   Marco Felsch <m.felsch@...gutronix.de>
To:     Daniel Baluta <daniel.baluta@....com>
Cc:     "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "mark.rutland@....com" <mark.rutland@....com>,
        Aisheng Dong <aisheng.dong@....com>,
        Peng Fan <peng.fan@....com>, Anson Huang <anson.huang@....com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        dl-linux-imx <linux-imx@....com>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "festevam@...il.com" <festevam@...il.com>,
        "S.j. Wang" <shengjiu.wang@....com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v2 2/2] arm64: dts: imx8mm-evk: Enable audio codec wm8524

Hi Daniel,

On 19-04-22 19:36, Daniel Baluta wrote:
> i.MX8MM has one wm8524 audio codec connected with
> SAI3 digital audio interface.
> 
> This patch uses simple-card machine driver in order
> to enable wm8524 codec.
> 
> We need to set:
> 	* SAI3 pinctrl configuration
> 	* clock hierarchy
> 	* codec node
> 	* simple-card configuration
> 
> Signed-off-by: Daniel Baluta <daniel.baluta@....com>
> ---
>  arch/arm64/boot/dts/freescale/imx8mm-evk.dts | 48 ++++++++++++++++++++
>  1 file changed, 48 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/freescale/imx8mm-evk.dts b/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
> index 2d5d89475b76..207b13266a96 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
> +++ b/arch/arm64/boot/dts/freescale/imx8mm-evk.dts
> @@ -37,6 +37,35 @@
>  		gpio = <&gpio2 19 GPIO_ACTIVE_HIGH>;
>  		enable-active-high;
>  	};
> +
> +	wm8524: audio-codec {
> +		#sound-dai-cells = <0>;
> +		compatible = "wlf,wm8524";
> +		wlf,mute-gpios = <&gpio5 21 GPIO_ACTIVE_LOW>;

I would mux the gpio where I use them.

> +	};
> +
> +	sound-wm8524 {
> +		compatible = "simple-audio-card";
> +		simple-audio-card,name = "wm8524-audio";
> +		simple-audio-card,format = "i2s";
> +		simple-audio-card,frame-master = <&cpudai>;
> +		simple-audio-card,bitclock-master = <&cpudai>;
> +		simple-audio-card,widgets =
> +			"Line", "Left Line Out Jack",
> +			"Line", "Right Line Out Jack";
> +		simple-audio-card,routing =
> +			"Left Line Out Jack", "LINEVOUTL",
> +			"Right Line Out Jack", "LINEVOUTR";
> +
> +		cpudai: simple-audio-card,cpu {
> +			sound-dai = <&sai3>;
> +		};
> +
> +		link_codec: simple-audio-card,codec {

Can you drop that phandle?

Regards,
  Marco

> +			sound-dai = <&wm8524>;
> +			clocks = <&clk IMX8MM_CLK_SAI3_ROOT>;
> +		};
> +	};
>  };
>  
>  &fec1 {
> @@ -61,6 +90,15 @@
>  	};
>  };
>  
> +&sai3 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_sai3>;
> +	assigned-clocks = <&clk IMX8MM_CLK_SAI3>;
> +	assigned-clock-parents = <&clk IMX8MM_AUDIO_PLL1_OUT>;
> +	assigned-clock-rates = <24576000>;
> +	status = "okay";
> +};
> +
>  &uart2 { /* console */
>  	pinctrl-names = "default";
>  	pinctrl-0 = <&pinctrl_uart2>;
> @@ -130,6 +168,16 @@
>  		>;
>  	};
>  
> +	pinctrl_sai3: sai3grp {
> +		fsl,pins = <
> +			MX8MM_IOMUXC_SAI3_TXFS_SAI3_TX_SYNC     0xd6
> +			MX8MM_IOMUXC_SAI3_TXC_SAI3_TX_BCLK      0xd6
> +			MX8MM_IOMUXC_SAI3_MCLK_SAI3_MCLK        0xd6
> +			MX8MM_IOMUXC_SAI3_TXD_SAI3_TX_DATA0     0xd6
> +			MX8MM_IOMUXC_I2C4_SDA_GPIO5_IO21        0xd6
> +		>;
> +	};
> +
>  	pinctrl_uart2: uart2grp {
>  		fsl,pins = <
>  			MX8MM_IOMUXC_UART2_RXD_UART2_DCE_RX	0x140
> -- 
> 2.17.1
> 

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