linux-kernel - Re: [PATCH v2 2/7] dt-bindings: ASoC: tlv320aic26: Add device tree binding

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Date:   Sun, 31 Mar 2019 01:41:21 -0500
From:   Rob Herring <robh@...nel.org>
To:     "Cormier, Jonathan" <jcormier@...ticallink.com>
Cc:     Liam Girdwood <lgirdwood@...il.com>, devicetree@...r.kernel.org,
        Bob Duke <bduke@...ticallink.com>,
        Mike Williamson <michael.williamson@...ticallink.com>,
        Greg Gluszek <greg.gluszek@...ticallink.com>,
        Mark Brown <broonie@...aro.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Peter Ujfalusi <peter.ujfalusi@...com>,
        Jyri Sarha <jsarha@...com>,
        Misael Lopez Cruz <misael.lopez@...com>,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/7] dt-bindings: ASoC: tlv320aic26: Add device tree
 binding

On Thu, Mar 21, 2019 at 06:15:44PM -0400, Cormier, Jonathan wrote:
> Add support for the TI tlv320aic26 sound codec
> 
> Signed-off-by: Cormier, Jonathan <jcormier@...ticallink.com>
> ---
>  .../devicetree/bindings/sound/tlv320aic26.txt | 65 +++++++++++++++++++
>  1 file changed, 65 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/sound/tlv320aic26.txt
> 
> diff --git a/Documentation/devicetree/bindings/sound/tlv320aic26.txt b/Documentation/devicetree/bindings/sound/tlv320aic26.txt
> new file mode 100644
> index 000000000000..93aa0f76ec0d
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/sound/tlv320aic26.txt
> @@ -0,0 +1,65 @@
> +Texas Instruments - tlv320aic26 Codec module
> +
> +The tlv320aic26 serial control bus communicates through I2C protocols
> +
> +Required properties:
> +
> +- compatible - "string" - One of:
> +    "ti,tlv320aic26" - TLV320AIC26
> +- reg - <int> -  SPI chip select
> +
> +CODEC input pins:
> +  * MICIN
> +  * AUX
> +
> +CODEC output pins:
> +  * HPL
> +  * HPR
> +
> +The pins can be used in referring sound node's audio-routing property.
> +
> +Example:
> +
> +tlv320aic26: tlv320aic26@0 {

audio-codec@0

> +	compatible = "ti,tlv320aic26";
> +	reg = <0>;
> +};
> +
> +&spi0 {
> +	pinctrl-names = "default", "sleep";
> +	pinctrl-0 = <&spi0_pins>;
> +	pinctrl-1 = <&spi0_sleep_pins>;
> +
> +	status = "okay";

Don't show status in examples.

> +	ti,pindir-d0-out-d1-in = <1>;
> +
> +	tlv320aic26: tlv320aic26@1 {

This split is convention, but outside the scope of binding docs, so 
please just show the complete node.

> +		compatible = "ti,tlv320aic26";
> +		reg = <0x1>;
> +		status = "okay";
> +
> +		spi-max-frequency = <2000000>;
> +		spi-cpha;
> +	};
> +};
> +
> +sound {
> +	compatible = "simple-audio-card";
> +	simple-audio-card,name = "AM335x_SND";
> +	simple-audio-card,format = "dsp_b";
> +	/* SND_SOC_DAIFMT_CBM_CFM */
> +	simple-audio-card,bitclock-master = <&tlv320aic26_codec>;
> +	simple-audio-card,frame-master = <&tlv320aic26_codec>;
> +	/* SND_SOC_DAIFMT_IB_NF */
> +	simple-audio-card,bitclock-inversion;
> +
> +	simple-audio-card,cpu {
> +		sound-dai = <&mcasp1>;
> +		system-clock-frequency = <24576000>;
> +	};
> +
> +	tlv320aic26_codec: simple-audio-card,codec {
> +		sound-dai = <&tlv320aic26>;
> +		system-clock-frequency = <24576000>;
> +	};
> +};
> -- 
> 2.21.0
>