linux-kernel - Re: [PATCH v3 1/9] ARM: dts: imx6ul-isiot: Add Sound card with codec node

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Message-ID: <20170407131649.GH16503@dragon>
Date:   Fri, 7 Apr 2017 21:16:51 +0800
From:   Shawn Guo <shawnguo@...nel.org>
To:     Jagan Teki <jagan@...nedev.com>
Cc:     linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Sascha Hauer <kernel@...gutronix.de>,
        Fabio Estevam <fabio.estevam@....com>,
        Matteo Lisi <matteo.lisi@...icam.com>,
        Michael Trimarchi <michael@...rulasolutions.com>,
        Jagan Teki <jagan@...rulasolutions.com>
Subject: Re: [PATCH v3 1/9] ARM: dts: imx6ul-isiot: Add Sound card with codec
 node

On Thu, Apr 06, 2017 at 11:32:07PM +0530, Jagan Teki wrote:
> From: Jagan Teki <jagan@...rulasolutions.com>
> 
> Add support for Sound card and related codec(via i2c1) nodes
> on Engicam Is.IoT MX6UL variant module boards.
> 
> Cc: Shawn Guo <shawnguo@...nel.org>
> Cc: Matteo Lisi <matteo.lisi@...icam.com>
> Cc: Michael Trimarchi <michael@...rulasolutions.com>
> Signed-off-by: Jagan Teki <jagan@...rulasolutions.com>
> ---
> Changes for v3:
> - Replace fsl,imx-audio-sgtl5000 and use simple-audio-card
> Changes for v2:
> - Use proper [label:] node-name[@unit-address] for codec
> - Remove incorrect codec property 'wlf,shared-lrclk'
> - Remove 'gpr' from sound card node
> 
>  arch/arm/boot/dts/imx6ul-isiot-common.dtsi | 10 +++++++
>  arch/arm/boot/dts/imx6ul-isiot.dtsi        | 44 ++++++++++++++++++++++++++++++

Can you help me understand how these two files are related?  Why is
sgtl5000 added into one and sound node added into the other?

Shawn

>  2 files changed, 54 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/imx6ul-isiot-common.dtsi b/arch/arm/boot/dts/imx6ul-isiot-common.dtsi
> index 2beaab6..d456080 100644
> --- a/arch/arm/boot/dts/imx6ul-isiot-common.dtsi
> +++ b/arch/arm/boot/dts/imx6ul-isiot-common.dtsi
> @@ -41,6 +41,16 @@
>   */
>  
>  &i2c1 {
> +	sgtl5000: codec@a {
> +		compatible = "fsl,sgtl5000";
> +		reg = <0x0a>;
> +		clocks = <&clks IMX6UL_CLK_OSC>;
> +		clock-names = "mclk";
> +		VDDA-supply = <&reg_3p3v>;
> +		VDDIO-supply = <&reg_3p3v>;
> +		VDDD-supply = <&reg_1p8v>;
> +	};
> +
>  	stmpe811: gpio-expander@44 {
>  		compatible = "st,stmpe811";
>  		reg = <0x44>;
> diff --git a/arch/arm/boot/dts/imx6ul-isiot.dtsi b/arch/arm/boot/dts/imx6ul-isiot.dtsi
> index ea30380..7e947e5 100644
> --- a/arch/arm/boot/dts/imx6ul-isiot.dtsi
> +++ b/arch/arm/boot/dts/imx6ul-isiot.dtsi
> @@ -69,6 +69,50 @@
>  				    100>;
>  		default-brightness-level = <100>;
>  	};
> +
> +	reg_1p8v: regulator-1p8v {
> +		compatible = "regulator-fixed";
> +		regulator-name = "1P8V";
> +		regulator-min-microvolt = <1800000>;
> +		regulator-max-microvolt = <1800000>;
> +		regulator-always-on;
> +		regulator-boot-on;
> +	};
> +
> +	reg_3p3v: regulator-3p3v {
> +		compatible = "regulator-fixed";
> +		regulator-name = "3P3V";
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +		regulator-always-on;
> +		regulator-boot-on;
> +	};
> +
> +	sound {
> +		compatible = "simple-audio-card";
> +		simple-audio-card,name = "imx6ul-isiot-sgtl5000";
> +		simple-audio-card,format = "i2s";
> +		simple-audio-card,bitclock-master = <&dailink_master>;
> +		simple-audio-card,frame-master = <&dailink_master>;
> +		simple-audio-card,widgets =
> +			"Microphone", "Mic Jack",
> +			"Line", "Line In",
> +			"Line", "Line Out",
> +			"Headphone", "Headphone Jack";
> +		simple-audio-card,routing =
> +			"MIC_IN", "Mic Jack",
> +			"Mic Jack", "Mic Bias",
> +			"Headphone Jack", "HP_OUT";
> +
> +		simple-audio-card,cpu {
> +			sound-dai = <&sai2>;
> +		};
> +
> +		dailink_master: simple-audio-card,codec {
> +			sound-dai = <&sgtl5000>;
> +			clocks = <&clks IMX6UL_CLK_SAI2>;
> +		};
> +	};
>  };
>  
>  &i2c1 {
> -- 
> 1.9.1
>