linux-kernel - Re: [PATCH v1 4/6] dt-bindings: clock: mediatek: add "simple-mfd" in audsys documentation

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Message-ID: <20180105190236.bapetnwxd6dii7re@rob-hp-laptop>
Date:   Fri, 5 Jan 2018 13:02:36 -0600
From:   Rob Herring <robh@...nel.org>
To:     Ryder Lee <ryder.lee@...iatek.com>
Cc:     Stephen Boyd <sboyd@...eaurora.org>,
        Mark Brown <broonie@...nel.org>,
        Lee Jones <lee.jones@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-clk@...r.kernel.org, Garlic Tseng <garlic.tseng@...iatek.com>
Subject: Re: [PATCH v1 4/6] dt-bindings: clock: mediatek: add "simple-mfd" in
 audsys documentation

On Thu, Jan 04, 2018 at 03:44:20PM +0800, Ryder Lee wrote:
> Add "simple-mfd" to support MFD device and add a compatible string for MT2701.
> 
> Signed-off-by: Ryder Lee <ryder.lee@...iatek.com>
> ---
>  .../bindings/arm/mediatek/mediatek,audsys.txt       | 21 +++++++++++++++------
>  1 file changed, 15 insertions(+), 6 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/arm/mediatek/mediatek,audsys.txt b/Documentation/devicetree/bindings/arm/mediatek/mediatek,audsys.txt
> index 9b8f578..6e97552 100644
> --- a/Documentation/devicetree/bindings/arm/mediatek/mediatek,audsys.txt
> +++ b/Documentation/devicetree/bindings/arm/mediatek/mediatek,audsys.txt
> @@ -6,17 +6,25 @@ The MediaTek AUDSYS controller provides various clocks to the system.
>  Required Properties:
>  
>  - compatible: Should be one of:
> -	- "mediatek,mt7622-audsys", "syscon"
> +	- "mediatek,mt2701-audsys", "syscon", "simple-mfd"
> +	- "mediatek,mt7622-audsys", "syscon", "simple-mfd"
>  - #clock-cells: Must be 1

I don't think this is a simple-mfd. The AFE uses clocks created by its 
parent, right? So the parent should be probed first. You should have 
the parent instantiate the child nodes.

>  The AUDSYS controller uses the common clk binding from
>  Documentation/devicetree/bindings/clock/clock-bindings.txt
>  The available clocks are defined in dt-bindings/clock/mt*-clk.h.
>  
> +See ../sound/mt2701-afe-pcm.txt for details about required subnode.
> +
>  Example:
>  
> -audsys: audsys@...20000 {
> -	compatible = "mediatek,mt7622-audsys", "syscon";
> -	reg = <0 0x11220000 0 0x1000>;
> -	#clock-cells = <1>;
> -};
> +	audsys: audio-subsystem@...20000 {
> +		compatible = "mediatek,mt2701-audsys", "syscon", "simple-mfd";
> +		reg = <0 0x11220000 0 0x1000>;
> +		#clock-cells = <1>;
> +
> +		afe: audio-controller {
> +			compatible = "mediatek,mt2701-audio";
> +			...
> +		};
> +	};
> -- 
> 1.9.1
> 
> --
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