linux-kernel - Re: [PATCH v2 1/2] dt-bindings: usb: mediatek,mtk-xhci: add str-clock-on

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Message-ID: <1604656720.24301.24.camel@mtkswgap22>
Date:   Fri, 6 Nov 2020 17:58:40 +0800
From:   Macpaul Lin <macpaul.lin@...iatek.com>
To:     Rob Herring <robh@...nel.org>
CC:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Mathias Nyman <mathias.nyman@...el.com>,
        "Chunfeng Yun (云春峰)" 
        <Chunfeng.Yun@...iatek.com>,
        Ainge Hsu (徐巧宜) 
        <ainge.hsu@...iatek.com>,
        Eddie Hung (洪正鑫) 
        <Eddie.Hung@...iatek.com>,
        wsd_upstream <wsd_upstream@...iatek.com>,
        Macpaul Lin <macpaul@...il.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>
Subject: Re: [PATCH v2 1/2] dt-bindings: usb: mediatek,mtk-xhci: add
 str-clock-on

On Fri, 2020-11-06 at 17:46 +0800, Macpaul Lin wrote:
> Option "mediatek,str-clock-on" means to keep clock on during system
> suspend and resume. Some platform will flush register settings if clock has
> been disabled when system is suspended. Set this option to avoid clock off.
> 
> Change-Id: Id841f58e9d7fb3656511072b3eb14d0d355e2dd5

Sorry I've found a Change-ID tag here,
I'll send patch v3.

> Signed-off-by: Macpaul Lin <macpaul.lin@...iatek.com>
> ---
> Changes for v2:
>   - Rename "mediatek,keep-clock-on" to "mediatek,str-clock-on" which implies
>     this option related to STR functions.
>   - After discussion with Chunfeng, resend dt-bindings descritption based on
>     mediatek,mtk-xhci.txt instead of yaml format.
> 
>  .../devicetree/bindings/usb/mediatek,mtk-xhci.txt  |    3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.txt b/Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.txt
> index 42d8814..fc93bcf 100644
> --- a/Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.txt
> +++ b/Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.txt
> @@ -37,6 +37,9 @@ Required properties:
>  
>  Optional properties:
>   - wakeup-source : enable USB remote wakeup;
> + - mediatek,str-clock-on: Keep clock on during system suspend and resume.
> +	Some platform will flush register settings if clock has been disabled
> +	when system is suspended.
>   - mediatek,syscon-wakeup : phandle to syscon used to access the register
>  	of the USB wakeup glue layer between xHCI and SPM; it depends on
>  	"wakeup-source", and has two arguments:

Thanks
Macpaul Lin