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=-7.3 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_MUTT autolearn=ham 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 566F2C43441 for ; Tue, 27 Nov 2018 17:35:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 264F420659 for ; Tue, 27 Nov 2018 17:35:17 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="key not found in DNS" (0-bit key) header.d=p23q.org header.i=@p23q.org header.b="bax00iMV" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 264F420659 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=p23q.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731829AbeK1Edw (ORCPT ); Tue, 27 Nov 2018 23:33:52 -0500 Received: from mail.gnuzifer.de ([78.46.242.17]:33581 "EHLO mail.gnuzifer.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726288AbeK1Edw (ORCPT ); Tue, 27 Nov 2018 23:33:52 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=p23q.org; s=20170531; h=Content-Type:MIME-Version:Message-ID:Subject:To:From:Date; bh=JuuLw8MTnSF+VbgGA6AE3nezuoFXrqLq7CumPTQqzAA=; b=bax00iMVS7dcip7eD+8lIN7pFevp0848v+y1Qng5FgZlrALjUJRaDdi9IkKLtzPOfuekJ2Ly/mLfR3zLgi7wkFhAr50jVxnE2vbQwkBosRabqSDXxfpQp/nyieQvw+qpW8owz2kodwcw2O53aFKPSkf+bM3UxtSU2J61aibk2qgm49J6z+R+mzGm1IYfFLWUDl+kzsfxF/xRxRObqtujAma6BMUZCCP+z4WU4f5QiVDblEQsrXI9I9I6gVOPkYStR3Ar9UY7MOSP1JCpopW2HSnS6CWTuY+iz9KOfYs4elkzoF4aL9SRm5Ff0KQ51BI0ztZKE3noFVtsY7BbKHzrGNV6mMnLS+ytgx2ZxDpv9Ko31zwhjtKeFpfAAkNzBA6n9FnHQ+4GHJbwHriaQp91UbKn17H/uzvxTch0Z52Ks/PIak4ufsymgBbaJOVYTHssKPz2pxOj7gZLQbCk4yQlbb4cyrARXdLy3u6zdoNBlYMGMZHZ4KcQ46aGacUVqAE0M8KztnYyo1Xgt3RX3lJQPkHkzBzweUoBpiatIOGZ8/mi2np6QX3S5TvdNsAbiYTsarUpriUQjafb6TOxU0R1FCULuB8zGojUlCtYYboJw6w9pGCnmkFPBn8FMWaP4CSemhsqD0hcbarN+29uI2EyMB6GqtUWEbvzm54OGAcKUuw=; Received: from authenticated user by mail.gnuzifer.de with esmtpsa (TLS1.2:DHE_RSA_AES_128_CBC_SHA1:128) (Exim 4.84_2) (envelope-from ) id 1gRgfg-0000Es-CF; Tue, 27 Nov 2018 17:57:14 +0100 Date: Tue, 27 Nov 2018 16:57:05 +0000 From: "David R. Piegdon" To: "Gustavo A. R. Silva" , Alan Stern , Chunfeng Yun , Greg Kroah-Hartman , Johan Hovold , Kay Sievers , Mark Rutland , Martin Blumenstingl , Mathias Nyman , Rob Herring , Roger Quadros , Sebastian Andrzej Siewior , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, systemd-devel@lists.freedesktop.org Subject: [RFC PATCH 0/2] USB: DTS: allow suggesting busnumber for platform USB bus via DTS alias Message-ID: <20181127165705.GA13460@lagavulin.indurad.x> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, on our embedded systems we rely on systemd's persistent netdev names. Those currently do not work for USB netdevs that are connected to a platform USB bus. In https://github.com/systemd/systemd/pull/7273 a systemd patch was suggested that would allow exactly this, but it was (rightfully) said that numbering of theses busses is not guaranteed. Internally we used the patch for a while now, but exactly that has happened with one of our platforms across different kernel revisions. The following kernel patches allow suggesting a USB busnumber for each USB platform bus via a DTS alias, as can be done similarly for many other devices. In combination with above systemd patch, these changes allow use of persistent netdev names also on platform USB busses. NOTE: this patch might change ordering of busses on devices that use platform-busses, if aliases for these busses have already been defined! In the current master there are a few platforms that contain such aliases, e.g. am33xx, dm814x or imx6qdl Yours, David David R. Piegdon (2): usb core: dts: allow suggesting usb bus number for platform busses dt-bindings: allow suggesting usb bus number for usb platform busses Documentation/devicetree/bindings/usb/usb-hcd.txt | 9 +++++++ drivers/usb/core/hcd.c | 30 ++++++++++++++++++----- 2 files changed, 33 insertions(+), 6 deletions(-) -- 2.11.0