linux-kernel - Re: [PATCH 3/3] ARM: dts: sun8i: V3/S3: add i2s peripheral

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Date:   Tue, 2 Mar 2021 10:14:14 +0100
From:   Maxime Ripard <maxime@...no.tech>
To:     Tobias Schramm <t.schramm@...jaro.org>
Cc:     Chen-Yu Tsai <wens@...e.org>, Rob Herring <robh+dt@...nel.org>,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] ARM: dts: sun8i: V3/S3: add i2s peripheral

Hi,

On Fri, Feb 26, 2021 at 11:30:28AM +0100, Tobias Schramm wrote:
> The V3 and S3 SoCs feature an i2s peripheral identical to that of the H3.
> Add it to the dts.
> 
> Signed-off-by: Tobias Schramm <t.schramm@...jaro.org>

Why is it added to the v3 DTSI and not the global one?

> ---
>  arch/arm/boot/dts/sun8i-v3.dtsi | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/sun8i-v3.dtsi b/arch/arm/boot/dts/sun8i-v3.dtsi
> index c279e13583ba..17ea6b8f091f 100644
> --- a/arch/arm/boot/dts/sun8i-v3.dtsi
> +++ b/arch/arm/boot/dts/sun8i-v3.dtsi
> @@ -30,3 +30,18 @@ uart1_pg_pins: uart1-pg-pins {
>  		function = "uart1";
>  	};
>  };
> +
> +&soc {

You don't need a label for that, you can just put it under / { soc {

> +		i2s0: i2s@...2000 {
> +			#sound-dai-cells = <0>;
> +			compatible = "allwinner,sun8i-h3-i2s";

We should also have a v3 specific compatible here in addition to the H3
(and document it in the bindings).

Maxime

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