linux-kernel - Re: [PATCH 09/14] dt-bindings: sound: Add sun8i codec documentation

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Date:   Tue, 4 Oct 2016 18:19:50 +0200
From:   Maxime Ripard <maxime.ripard@...e-electrons.com>
To:     Mylène Josserand 
        <mylene.josserand@...e-electrons.com>
Cc:     vinod.koul@...el.com, wens@...e.org, mturquette@...libre.com,
        sboyd@...eaurora.org, lgirdwood@...il.com, broonie@...nel.org,
        perex@...ex.cz, tiwai@...e.com, lee.jones@...aro.org,
        mark.rutland@....com, robh+dt@...nel.org,
        linux-kernel@...r.kernel.org, dmaengine@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-clk@...r.kernel.org,
        alsa-devel@...a-project.org, devicetree@...r.kernel.org,
        linux-sunxi@...glegroups.com, thomas.petazzoni@...e-electrons.com,
        alexandre.belloni@...e-electrons.com
Subject: Re: [PATCH 09/14] dt-bindings: sound: Add sun8i codec documentation

On Tue, Oct 04, 2016 at 11:46:22AM +0200, Mylène Josserand wrote:
> Add the documentation for dt-binding of the digital audio codec driver
> for sun8i SoC.
> 
> Signed-off-by: Mylène Josserand <mylene.josserand@...e-electrons.com>
> ---
>  .../devicetree/bindings/sound/sun8i-codec.txt      | 24 ++++++++++++++++++++++
>  1 file changed, 24 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/sound/sun8i-codec.txt
> 
> diff --git a/Documentation/devicetree/bindings/sound/sun8i-codec.txt b/Documentation/devicetree/bindings/sound/sun8i-codec.txt
> new file mode 100644
> index 0000000..1808869
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/sound/sun8i-codec.txt
> @@ -0,0 +1,24 @@
> +* Allwinner A23/A33 Codec
> +
> +Required properties:
> +- compatible: must be either "allwinner,sun4i-a23-codec" or
> +  "allwinner,sun7i-a33-codec"

Copy and paste issue ? :)

One compatible by line is usually favored, since when you'll add new
compatibles, you don't have to modify the context.xs

> +- reg: must contain the registers location and length
> +- interrupts: must contain the codec interrupt
> +- clocks: a list of phandle + clock-specifer pairs, one for each entry
> +  in clock-names.
> +- clock-names: should contain followings:
> +   - "apb": the parent APB clock for this controller
> +   - "codec": the parent module clock

We're usually calling them "bus" and "mod".

> +
> +Example:
> +codec: codec@...22e00 {
> +	#sound-dai-cells = <0>;
> +	compatible = "allwinner,sun8i-a33-codec";
> +	reg = <0x01c22e00 0x400>; /* SUNXI_AUDIO_PBASE + 0x200 */
> +	reg-names = "audio";

You don't define reg-names in your bindings, while your code relies on
it. It isn't really needed, since you have only one couple of base +
size, so it should just go away.

Thanks!
Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

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