linux-kernel - Re: [PATCH 1/4] dt-bindings: usb: mtk-xhci: add support 'resets' property

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Date:   Mon, 23 May 2022 18:41:25 +0800
From:   Rex-BC Chen <rex-bc.chen@...iatek.com>
To:     Chunfeng Yun <chunfeng.yun@...iatek.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh+dt@...nel.org>
CC:     Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Mathias Nyman <mathias.nyman@...el.com>,
        <linux-usb@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        Eddie Hung <eddie.hung@...iatek.com>
Subject: Re: [PATCH 1/4] dt-bindings: usb: mtk-xhci: add support 'resets'
 property

On Mon, 2022-05-23 at 17:04 +0800, Chunfeng Yun wrote:
> Add 'resets' property to support IP reset usually by top pericfg.
> 
> Signed-off-by: Chunfeng Yun <chunfeng.yun@...iatek.com>
> ---
>  Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.yaml | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/usb/mediatek,mtk-
> xhci.yaml b/Documentation/devicetree/bindings/usb/mediatek,mtk-
> xhci.yaml
> index 084d7135b2d9..892718459d25 100644
> --- a/Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.yaml
> +++ b/Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.yaml
> @@ -113,6 +113,9 @@ properties:
>    vbus-supply:
>      description: Regulator of USB VBUS5v
>  
> +  resets:
> +    maxItems: 1
> +
>    usb3-lpm-capable: true
>  
>    usb2-lpm-disable: true

Hello Chunfeng,

Which soc we will use this reset?
I am upstreaming another series for system clock reset.
I think you should add how to use for this series base on [1].

[1]: 
https://lore.kernel.org/linux-clk/5067ec46-7a82-6b7b-5b07-3102cfaefbf6@collabora.com/T/#m5b6abb9bd2109e4ed9a1a3eeee6e7976892cb8c2

BRs,
Rex