linux-kernel - Re: [PATCH 3/6] dt-bindings: mtu3: add devicetree bindings

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Message-ID: <CAL_JsqJKW_C-LtCchAMn5c_VHxBz6n3DBBRFn9hCXcaAbpZrUg@mail.gmail.com>
Date:	Thu, 12 May 2016 22:09:08 -0500
From:	Rob Herring <robh@...nel.org>
To:	chunfeng yun <chunfeng.yun@...iatek.com>
Cc:	Alan Cooper <alcooperx@...il.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Felipe Balbi <felipe.balbi@...ux.intel.com>,
	Mathias Nyman <mathias.nyman@...el.com>,
	Alan Stern <stern@...land.harvard.edu>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Matthias Brugger <matthias.bgg@...il.com>,
	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
	Pawel Moll <pawel.moll@....com>,
	Kumar Gala <galak@...eaurora.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Linus Walleij <linus.walleij@...aro.org>,
	Biao Huang <biao.huang@...iatek.com>,
	USB list <linux-usb@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	linux-mediatek@...ts.infradead.org,
	"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>
Subject: Re: [PATCH 3/6] dt-bindings: mtu3: add devicetree bindings

On Thu, May 12, 2016 at 9:00 PM, chunfeng yun <chunfeng.yun@...iatek.com> wrote:
> Hi,
>
> On Thu, 2016-05-12 at 19:02 -0400, Alan Cooper wrote:
>> On Thu, May 12, 2016 at 3:24 AM, chunfeng yun <chunfeng.yun@...iatek.com> wrote:
>> >> > + - mediatek,enable-manual-drd : supports manual dual-role switch by sysfs
>> >> > +   interface; only used when receptacle is TYPE-A and also wants to support
>> >> > +   dual-role mode.
>> >>
>> >> sysfs is a Linux detail that doesn't apply to the binding. Does the
>> >> property mean "the IP block supports or doesn't support switching"  or
>> >> "I want to enable switching feature". Only the former belongs in DT.
>> >>
>> > It is the former case, and has little relation with sysfs interface.
>> > I will modify it later, sorry for my unclear description.
>>
>> Could the property name be just "enable-manual-drd" instead of
>> "mediatek,enable-manual-drd"? I expect to have to add this
>> functionality to our USB driver in the near future.
>
> Do you mean provide some APIs to in common USB driver?

Probably, but first just put the property in a common binding doc.

Rob