From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Subject: dt-binding: usb: add usb-role-switch property From: Rob Herring Message-Id: <20190502194905.GA22144@bogus> Date: Thu, 2 May 2019 14:49:05 -0500 To: Chunfeng Yun Cc: Greg Kroah-Hartman , Mark Rutland , Matthias Brugger , linux-usb@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, Biju Das , Yu Chen , Heikki Krogerus , Min Guo , Felipe Balbi List-ID: T24gU3VuLCBBcHIgMjgsIDIwMTkgYXQgMDg6Mjc6NDZQTSArMDgwMCwgQ2h1bmZlbmcgWXVuIHdy b3RlOgo+IEFkZCBhIHByb3BlcnR5IHVzYi1yb2xlLXN3aXRjaCB0byB0ZWxsIER1YWwtUm9sZSBj b250cm9sbGVyIGRyaXZlcgo+IHRoYXQgdXNlIFVTQiBSb2xlIFN3aXRjaCBmcmFtZXdvcmsgdG8g aGFuZGxlIHRoZSByb2xlIHN3aXRjaCBiZXR3ZWVuCj4gaG9zdCBtb2RlIGFuZCBkZXZpY2UgbW9k ZSwgaXQncyB1c2VmdWwgd2hlbiB0aGUgZHJpdmVyIGhhcyBhbHJlYWR5Cj4gc3VwcG9ydGVkIG90 aGVyIHdheXMsIHN1Y2ggYXMgZXh0Y29uIGZyYW1ld29yayBldGMuCj4gCj4gQ2M6IEJpanUgRGFz IDxiaWp1LmRhc0BicC5yZW5lc2FzLmNvbT4KPiBDYzogWXUgQ2hlbiA8Y2hlbnl1NTZAaHVhd2Vp LmNvbT4KPiBTaWduZWQtb2ZmLWJ5OiBDaHVuZmVuZyBZdW4gPGNodW5mZW5nLnl1bkBtZWRpYXRl ay5jb20+Cj4gLS0tCj4gdjE6Cj4gdGhlIHByb3BlcnR5IGlzIGRpc2N1c3NlZCBpbjoKPiBbdjIs Mi83XSBkdC1iaW5kaW5nczogdXNiOiByZW5lc2FzX3VzYjM6IGFkZCB1c2Itcm9sZS1zd2l0Y2gg cHJvcGVydHkKPiBodHRwczovL3BhdGNod29yay5rZXJuZWwub3JnL3BhdGNoLzEwODUyNDk3Lwo+ IAo+IE1lZGlhdGVrIGFuZCBIaXNpbGljb24gYWxzbyB0cnkgdG8gdXNlIGl0Ogo+IFt2NCwzLzZd IGR0LWJpbmRpbmdzOiB1c2I6IG10dTM6IGFkZCBwcm9wZXJ0aWVzIGFib3V0IFVTQiBSb2xlIFN3 aXRjaAo+IGh0dHBzOi8vcGF0Y2h3b3JrLmtlcm5lbC5vcmcvcGF0Y2gvMTA5MTgzODUvCj4gW3Y0 LDYvNl0gdXNiOiBtdHUzOiByZWdpc3RlciBhIFVTQiBSb2xlIFN3aXRjaCBmb3IgZHVhbCByb2xl IG1vZGUKPiBodHRwczovL3BhdGNod29yay5rZXJuZWwub3JnL3BhdGNoLzEwOTE4MzY3Lwo+IAo+ IFt2NiwxMC8xM10gdXNiOiBkd2MzOiBSZWdpc3RlcmluZyBhIHJvbGUgc3dpdGNoIGluIHRoZSBE UkQgY29kZQo+IGh0dHBzOi8vcGF0Y2h3b3JrLmtlcm5lbC5vcmcvcGF0Y2gvMTA5MDk5ODEvCj4g LS0tCj4gIERvY3VtZW50YXRpb24vZGV2aWNldHJlZS9iaW5kaW5ncy91c2IvZ2VuZXJpYy50eHQg fCAzICsrKwo+ICAxIGZpbGUgY2hhbmdlZCwgMyBpbnNlcnRpb25zKCspCj4gCj4gZGlmZiAtLWdp dCBhL0RvY3VtZW50YXRpb24vZGV2aWNldHJlZS9iaW5kaW5ncy91c2IvZ2VuZXJpYy50eHQgYi9E b2N1bWVudGF0aW9uL2RldmljZXRyZWUvYmluZGluZ3MvdXNiL2dlbmVyaWMudHh0Cj4gaW5kZXgg MGE3NGFiOGRmZGMyLi5jNzM5NTBiNzI1MTMgMTAwNjQ0Cj4gLS0tIGEvRG9jdW1lbnRhdGlvbi9k ZXZpY2V0cmVlL2JpbmRpbmdzL3VzYi9nZW5lcmljLnR4dAo+ICsrKyBiL0RvY3VtZW50YXRpb24v ZGV2aWNldHJlZS9iaW5kaW5ncy91c2IvZ2VuZXJpYy50eHQKPiBAQCAtMzAsNiArMzAsOSBAQCBP cHRpb25hbCBwcm9wZXJ0aWVzOgo+ICAJCQlvcHRpb25hbCBmb3IgT1RHIGRldmljZS4KPiAgIC0g YWRwLWRpc2FibGU6IHRlbGxzIE9URyBjb250cm9sbGVycyB3ZSB3YW50IHRvIGRpc2FibGUgT1RH IEFEUCwgQURQIGlzCj4gIAkJCW9wdGlvbmFsIGZvciBPVEcgZGV2aWNlLgo+ICsgLSB1c2Itcm9s ZS1zd2l0Y2g6IHRlbGxzIER1YWwtUm9sZSBVU0IgY29udHJvbGxlciBkcml2ZXIgdGhhdCB3ZSB3 YW50IHRvIHVzZQo+ICsJCQlVU0IgUm9sZSBTd2l0Y2ggZnJhbWV3b3JrIHRvIGhhbmRsZSB0aGUg cm9sZSBzd2l0Y2gKPiArCQkJYmV0d2VlbiBob3N0IG1vZGUgYW5kIGRldmljZSBtb2RlLgoKUGxl YXNlIGRlc2NyaWJlIHRoaXMgaW4gdGVybXMgb2YgaC93IGZ1bmN0aW9uYWxpdHksIG5vdCBkcml2 ZXJzIGFuZCAKTGludXggdGhpbmdzLgoKUm9iCg== From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS, T_DKIMWL_WL_HIGH,URIBL_BLOCKED,USER_AGENT_MUTT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9A986C43219 for ; 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[24.155.109.49]) by smtp.gmail.com with ESMTPSA id 189sm89076oid.35.2019.05.02.12.49.05 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 02 May 2019 12:49:05 -0700 (PDT) Date: Thu, 2 May 2019 14:49:05 -0500 From: Rob Herring To: Chunfeng Yun Cc: Greg Kroah-Hartman , Mark Rutland , Matthias Brugger , linux-usb@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, Biju Das , Yu Chen , Heikki Krogerus , Min Guo , Felipe Balbi Subject: Re: [PATCH] dt-binding: usb: add usb-role-switch property Message-ID: <20190502194905.GA22144@bogus> References: <5756e05930f5e6a3940ad9d019399c8e63d24f18.1556454324.git.chunfeng.yun@mediatek.com> MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Disposition: inline In-Reply-To: <5756e05930f5e6a3940ad9d019399c8e63d24f18.1556454324.git.chunfeng.yun@mediatek.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Message-ID: <20190502194905.hIvtArGNFgM7zRKAl02rElHAjPGMkgn1HHQngfaaN24@z> On Sun, Apr 28, 2019 at 08:27:46PM +0800, Chunfeng Yun wrote: > Add a property usb-role-switch to tell Dual-Role controller driver > that use USB Role Switch framework to handle the role switch between > host mode and device mode, it's useful when the driver has already > supported other ways, such as extcon framework etc. > > Cc: Biju Das > Cc: Yu Chen > Signed-off-by: Chunfeng Yun > --- > v1: > the property is discussed in: > [v2,2/7] dt-bindings: usb: renesas_usb3: add usb-role-switch property > https://patchwork.kernel.org/patch/10852497/ > > Mediatek and Hisilicon also try to use it: > [v4,3/6] dt-bindings: usb: mtu3: add properties about USB Role Switch > https://patchwork.kernel.org/patch/10918385/ > [v4,6/6] usb: mtu3: register a USB Role Switch for dual role mode > https://patchwork.kernel.org/patch/10918367/ > > [v6,10/13] usb: dwc3: Registering a role switch in the DRD code > https://patchwork.kernel.org/patch/10909981/ > --- > Documentation/devicetree/bindings/usb/generic.txt | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/Documentation/devicetree/bindings/usb/generic.txt b/Documentation/devicetree/bindings/usb/generic.txt > index 0a74ab8dfdc2..c73950b72513 100644 > --- a/Documentation/devicetree/bindings/usb/generic.txt > +++ b/Documentation/devicetree/bindings/usb/generic.txt > @@ -30,6 +30,9 @@ Optional properties: > optional for OTG device. > - adp-disable: tells OTG controllers we want to disable OTG ADP, ADP is > optional for OTG device. > + - usb-role-switch: tells Dual-Role USB controller driver that we want to use > + USB Role Switch framework to handle the role switch > + between host mode and device mode. Please describe this in terms of h/w functionality, not drivers and Linux things. Rob