[{"id":1776386,"web_url":"http://patchwork.ozlabs.org/comment/1776386/","msgid":"<20170927141213.GF13516@lunn.ch>","list_archive_url":null,"date":"2017-09-27T14:12:13","subject":"Re: [PATCH v6 11/11] of: mdio: Prevent of_mdiobus_register from\n\tscanning mdio-mux nodes","submitter":{"id":13608,"url":"http://patchwork.ozlabs.org/api/people/13608/","name":"Andrew Lunn","email":"andrew@lunn.ch"},"content":"On Wed, Sep 27, 2017 at 09:34:14AM +0200, Corentin Labbe wrote:\n> Each child node of an MDIO node is scanned as a PHY when calling\n> of_mdiobus_register() givint the following result:\n> [ 18.175379] mdio_bus stmmac-0: /soc/ethernet@1c30000/mdio/mdio-mux has invalid PHY address\n> [ 18.175408] mdio_bus stmmac-0: scan phy mdio-mux at address 0\n> [ 18.175450] mdio_bus stmmac-0: scan phy mdio-mux at address 1\n> [...]\n> [ 18.176420] mdio_bus stmmac-0: scan phy mdio-mux at address 30\n> [ 18.176452] mdio_bus stmmac-0: scan phy mdio-mux at address 31\n> \n> Since mdio-mux nodes are not PHY, this patch a way to to not scan\n> them.\n\nHi Corentin\n\nI still don't like this, but ...\n\n> \n> Signed-off-by: Corentin Labbe \n> ---\n> drivers/of/of_mdio.c | 10 ++++++++++\n> 1 file changed, 10 insertions(+)\n> \n> diff --git a/drivers/of/of_mdio.c b/drivers/of/of_mdio.c\n> index d94dd8b77abd..d90ddb0d90f2 100644\n> --- a/drivers/of/of_mdio.c\n> +++ b/drivers/of/of_mdio.c\n> @@ -190,6 +190,10 @@ int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np)\n> \tstruct device_node *child;\n> \tbool scanphys = false;\n> \tint addr, rc;\n> +\tstatic const struct of_device_id do_not_scan[] = {\n> +\t\t{ .compatible = \"mdio-mux\" },\n> +\t\t{}\n> +\t};\n\nPlease rename this to some less generic. What i don't want is other\ncompatible strings added here. We want to make the exception for\nmuxes, but nothing else. So something like compatible_muxes?\n\n Andrew","headers":{"Return-Path":"","X-Original-To":"patchwork-incoming@ozlabs.org","Delivered-To":"patchwork-incoming@ozlabs.org","Authentication-Results":"ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=vger.kernel.org\n\t(client-ip=209.132.180.67; helo=vger.kernel.org;\n\tenvelope-from=netdev-owner@vger.kernel.org;\n\treceiver=)","Received":["from vger.kernel.org (vger.kernel.org [209.132.180.67])\n\tby ozlabs.org (Postfix) with ESMTP id 3y2KXK5F6Nz9t3m\n\tfor ;\n\tThu, 28 Sep 2017 00:12:33 +1000 (AEST)","(majordomo@vger.kernel.org) by vger.kernel.org via listexpand\n\tid S1753339AbdI0OMX (ORCPT );\n\tWed, 27 Sep 2017 10:12:23 -0400","from vps0.lunn.ch ([185.16.172.187]:58178 \"EHLO vps0.lunn.ch\"\n\trhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP\n\tid S1752406AbdI0OMV (ORCPT );\n\tWed, 27 Sep 2017 10:12:21 -0400","from andrew by vps0.lunn.ch with local (Exim 4.84_2)\n\t(envelope-from )\n\tid 1dxD4P-0002h0-Ld; Wed, 27 Sep 2017 16:12:13 +0200"],"Date":"Wed, 27 Sep 2017 16:12:13 +0200","From":"Andrew Lunn ","To":"Corentin Labbe ","Cc":"robh+dt@kernel.org, mark.rutland@arm.com,\n\tmaxime.ripard@free-electrons.com, wens@csie.org,\n\tlinux@armlinux.org.uk, catalin.marinas@arm.com,\n\twill.deacon@arm.com, peppe.cavallaro@st.com,\n\talexandre.torgue@st.com, f.fainelli@gmail.com,\n\tfrowand.list@gmail.com, netdev@vger.kernel.org,\n\tdevicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,\n\tlinux-kernel@vger.kernel.org, linux-sunxi@googlegroups.com","Subject":"Re: [PATCH v6 11/11] of: mdio: Prevent of_mdiobus_register from\n\tscanning mdio-mux nodes","Message-ID":"<20170927141213.GF13516@lunn.ch>","References":"<20170927073414.17361-1-clabbe.montjoie@gmail.com>\n\t<20170927073414.17361-12-clabbe.montjoie@gmail.com>","MIME-Version":"1.0","Content-Type":"text/plain; charset=us-ascii","Content-Disposition":"inline","In-Reply-To":"<20170927073414.17361-12-clabbe.montjoie@gmail.com>","User-Agent":"Mutt/1.5.23 (2014-03-12)","Sender":"netdev-owner@vger.kernel.org","Precedence":"bulk","List-ID":"","X-Mailing-List":"netdev@vger.kernel.org"}},{"id":1776759,"web_url":"http://patchwork.ozlabs.org/comment/1776759/","msgid":"","list_archive_url":null,"date":"2017-09-28T04:50:46","subject":"Re: [PATCH v6 11/11] of: mdio: Prevent of_mdiobus_register from\n\tscanning mdio-mux nodes","submitter":{"id":2800,"url":"http://patchwork.ozlabs.org/api/people/2800/","name":"Florian Fainelli","email":"f.fainelli@gmail.com"},"content":"On 09/27/2017 07:12 AM, Andrew Lunn wrote:\n> On Wed, Sep 27, 2017 at 09:34:14AM +0200, Corentin Labbe wrote:\n>> Each child node of an MDIO node is scanned as a PHY when calling\n>> of_mdiobus_register() givint the following result:\n>> [ 18.175379] mdio_bus stmmac-0: /soc/ethernet@1c30000/mdio/mdio-mux has invalid PHY address\n>> [ 18.175408] mdio_bus stmmac-0: scan phy mdio-mux at address 0\n>> [ 18.175450] mdio_bus stmmac-0: scan phy mdio-mux at address 1\n>> [...]\n>> [ 18.176420] mdio_bus stmmac-0: scan phy mdio-mux at address 30\n>> [ 18.176452] mdio_bus stmmac-0: scan phy mdio-mux at address 31\n>>\n>> Since mdio-mux nodes are not PHY, this patch a way to to not scan\n>> them.\n> \n> Hi Corentin\n> \n> I still don't like this, but ...\n\nMe neither, even more so as I don't understand the reasoning behind\nputting the mux as a child node of the MDIO bus controller in the first\nplace.\n\nAlso, you need to re-order patches such that this patch comes before the\nDTS changes.\n\n> \n>>\n>> Signed-off-by: Corentin Labbe \n>> ---\n>> drivers/of/of_mdio.c | 10 ++++++++++\n>> 1 file changed, 10 insertions(+)\n>>\n>> diff --git a/drivers/of/of_mdio.c b/drivers/of/of_mdio.c\n>> index d94dd8b77abd..d90ddb0d90f2 100644\n>> --- a/drivers/of/of_mdio.c\n>> +++ b/drivers/of/of_mdio.c\n>> @@ -190,6 +190,10 @@ int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np)\n>> \tstruct device_node *child;\n>> \tbool scanphys = false;\n>> \tint addr, rc;\n>> +\tstatic const struct of_device_id do_not_scan[] = {\n>> +\t\t{ .compatible = \"mdio-mux\" },\n>> +\t\t{}\n>> +\t};\n> \n> Please rename this to some less generic. What i don't want is other\n> compatible strings added here. We want to make the exception for\n> muxes, but nothing else. So something like compatible_muxes?\n> \n> Andrew\n>","headers":{"Return-Path":"","X-Original-To":"patchwork-incoming@ozlabs.org","Delivered-To":"patchwork-incoming@ozlabs.org","Authentication-Results":["ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=vger.kernel.org\n\t(client-ip=209.132.180.67; helo=vger.kernel.org;\n\tenvelope-from=netdev-owner@vger.kernel.org;\n\treceiver=)","ozlabs.org; dkim=pass (2048-bit key;\n\tunprotected) header.d=gmail.com header.i=@gmail.com\n\theader.b=\"mXVolsHO\"; dkim-atps=neutral"],"Received":["from vger.kernel.org (vger.kernel.org [209.132.180.67])\n\tby ozlabs.org (Postfix) with ESMTP id 3y2j2445g1z9sNc\n\tfor ;\n\tThu, 28 Sep 2017 14:51:08 +1000 (AEST)","(majordomo@vger.kernel.org) by vger.kernel.org via listexpand\n\tid S1752464AbdI1Eux (ORCPT );\n\tThu, 28 Sep 2017 00:50:53 -0400","from mail-oi0-f65.google.com ([209.85.218.65]:34935 \"EHLO\n\tmail-oi0-f65.google.com\" rhost-flags-OK-OK-OK-OK) by vger.kernel.org\n\twith ESMTP id S1751746AbdI1Euv (ORCPT\n\t); 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Linux x86_64; rv:52.0) Gecko/20100101\n\tThunderbird/52.3.0","MIME-Version":"1.0","In-Reply-To":"<20170927141213.GF13516@lunn.ch>","Content-Type":"text/plain; charset=windows-1252","Content-Language":"en-US","Content-Transfer-Encoding":"7bit","Sender":"netdev-owner@vger.kernel.org","Precedence":"bulk","List-ID":"","X-Mailing-List":"netdev@vger.kernel.org"}},{"id":1781074,"web_url":"http://patchwork.ozlabs.org/comment/1781074/","msgid":"<20171005220927.7rabn3ftvow253xj@rob-hp-laptop>","list_archive_url":null,"date":"2017-10-05T22:09:27","subject":"Re: [PATCH v6 11/11] of: mdio: Prevent of_mdiobus_register from\n\tscanning mdio-mux nodes","submitter":{"id":62529,"url":"http://patchwork.ozlabs.org/api/people/62529/","name":"Rob Herring","email":"robh@kernel.org"},"content":"On Wed, Sep 27, 2017 at 09:50:46PM -0700, Florian Fainelli wrote:\n> \n> \n> On 09/27/2017 07:12 AM, Andrew Lunn wrote:\n> > On Wed, Sep 27, 2017 at 09:34:14AM +0200, Corentin Labbe wrote:\n> >> Each child node of an MDIO node is scanned as a PHY when calling\n> >> of_mdiobus_register() givint the following result:\n> >> [ 18.175379] mdio_bus stmmac-0: /soc/ethernet@1c30000/mdio/mdio-mux has invalid PHY address\n> >> [ 18.175408] mdio_bus stmmac-0: scan phy mdio-mux at address 0\n> >> [ 18.175450] mdio_bus stmmac-0: scan phy mdio-mux at address 1\n> >> [...]\n> >> [ 18.176420] mdio_bus stmmac-0: scan phy mdio-mux at address 30\n> >> [ 18.176452] mdio_bus stmmac-0: scan phy mdio-mux at address 31\n> >>\n> >> Since mdio-mux nodes are not PHY, this patch a way to to not scan\n> >> them.\n> > \n> > Hi Corentin\n> > \n> > I still don't like this, but ...\n> \n> Me neither, even more so as I don't understand the reasoning behind\n> putting the mux as a child node of the MDIO bus controller in the first\n> place.\n\nIf no one agrees with me, then you shouldn't just accept my answers. I'm \nnot always right.\n\nLooking at this some more, why can't mdio-mux-mmio be used? Then there \nis nothing to review or discuss. If you want to extend that then make it \nclear this is just extending/inheriting already defined bindings.\n\nThat being said, if we were starting over I would probably do mux \ndesigns differently with DT hierarchy reflecting the mux hierarchy, but \nthat ship has sailed.\n\nRob","headers":{"Return-Path":"","X-Original-To":"patchwork-incoming@ozlabs.org","Delivered-To":"patchwork-incoming@ozlabs.org","Authentication-Results":"ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=vger.kernel.org\n\t(client-ip=209.132.180.67; helo=vger.kernel.org;\n\tenvelope-from=netdev-owner@vger.kernel.org;\n\treceiver=)","Received":["from vger.kernel.org (vger.kernel.org [209.132.180.67])\n\tby ozlabs.org (Postfix) with ESMTP id 3y7RlB1zb7z9t63\n\tfor ;\n\tFri, 6 Oct 2017 09:09:42 +1100 (AEDT)","(majordomo@vger.kernel.org) by vger.kernel.org via listexpand\n\tid S1751498AbdJEWJa (ORCPT );\n\tThu, 5 Oct 2017 18:09:30 -0400","from mail-oi0-f48.google.com ([209.85.218.48]:47365 \"EHLO\n\tmail-oi0-f48.google.com\" rhost-flags-OK-OK-OK-OK) by vger.kernel.org\n\twith ESMTP id S1751369AbdJEWJ3 (ORCPT\n\t); Thu, 5 Oct 2017 18:09:29 -0400","by mail-oi0-f48.google.com with SMTP id p187so26952710oif.4;\n\tThu, 05 Oct 2017 15:09:28 -0700 (PDT)","from localhost (216-188-254-6.dyn.grandenetworks.net.\n\t[216.188.254.6]) by smtp.gmail.com with ESMTPSA id\n\th124sm33184oib.34.2017.10.05.15.09.27\n\t(version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256);\n\tThu, 05 Oct 2017 15:09:27 -0700 (PDT)"],"X-Google-DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/relaxed;\n\td=1e100.net; s=20161025;\n\th=x-gm-message-state:date:from:to:cc:subject:message-id:references\n\t:mime-version:content-disposition:in-reply-to:user-agent;\n\tbh=1RCN6xC8xFRao7A8uSNOdvC+lX7CucwQZP5OaoiOGIM=;\n\tb=WWFN4biWc+BHB6h1Ii1/UDAl0Z1NzFO8UzRpMXX0Ii+ohrtpO5Qgg/5zZGJ+QvumCb\n\tf+kPleUFxdiqlxq1ojg414lDT93mqXYd9F3/6S68cdoUnCM+z4rD7b2z8rKhXMq3Wyg7\n\teUCYidmGXYYADC3Dt7YOKkV9zvVE4CMk7TiNXvfiijo/XBIudY3kycyRg5VDt9VNIx/I\n\twfUUFwqgYHT9vtoSDbTSeyfgYITtZ2ssjkQdlhk5pnAz9LYnSKgrGUQmyVQWerSgd+DS\n\t1H2O1XcZi3gsU7GFWKjFil94Xs6A9fS64RODTq2+zIsYOTkG6sgKNcsLKHDvI/G3r92a\n\tI0pw==","X-Gm-Message-State":"AMCzsaV42Nd2LrN+m/JRb3uYanZ6km0KWA+ltJnUbLzTdK4CoxTPyokU\n\tkQiHeISlKQ0daI3/7bZamw==","X-Google-Smtp-Source":"AOwi7QDPUahKbsVHGeHRlwyw1j1WAAJqRFcgA0ij/YHvnGmGEJhVF0hCkigHa8le0iWUjpO5uNyVPw==","X-Received":"by 10.157.46.207 with SMTP id w73mr78092ota.227.1507241368458;\n\tThu, 05 Oct 2017 15:09:28 -0700 (PDT)","Date":"Thu, 5 Oct 2017 17:09:27 -0500","From":"Rob Herring ","To":"Florian Fainelli ","Cc":"Andrew Lunn , Corentin Labbe ,\n\tmark.rutland@arm.com, maxime.ripard@free-electrons.com,\n\twens@csie.org, linux@armlinux.org.uk, catalin.marinas@arm.com,\n\twill.deacon@arm.com, peppe.cavallaro@st.com,\n\talexandre.torgue@st.com, frowand.list@gmail.com,\n\tnetdev@vger.kernel.org, devicetree@vger.kernel.org,\n\tlinux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,\n\tlinux-sunxi@googlegroups.com","Subject":"Re: [PATCH v6 11/11] of: mdio: Prevent of_mdiobus_register from\n\tscanning mdio-mux nodes","Message-ID":"<20171005220927.7rabn3ftvow253xj@rob-hp-laptop>","References":"<20170927073414.17361-1-clabbe.montjoie@gmail.com>\n\t<20170927073414.17361-12-clabbe.montjoie@gmail.com>\n\t<20170927141213.GF13516@lunn.ch>\n\t","MIME-Version":"1.0","Content-Type":"text/plain; charset=us-ascii","Content-Disposition":"inline","In-Reply-To":"","User-Agent":"NeoMutt/20170113 (1.7.2)","Sender":"netdev-owner@vger.kernel.org","Precedence":"bulk","List-ID":"","X-Mailing-List":"netdev@vger.kernel.org"}},{"id":1781091,"web_url":"http://patchwork.ozlabs.org/comment/1781091/","msgid":"<20171005222159.GO13247@lunn.ch>","list_archive_url":null,"date":"2017-10-05T22:21:59","subject":"Re: [PATCH v6 11/11] of: mdio: Prevent of_mdiobus_register from\n\tscanning mdio-mux nodes","submitter":{"id":13608,"url":"http://patchwork.ozlabs.org/api/people/13608/","name":"Andrew Lunn","email":"andrew@lunn.ch"},"content":"> Looking at this some more, why can't mdio-mux-mmio be used?\n\nHi Rob\n\nThat was my first thought. And then i dug into the details. The mux is\nmore than just a couple of bits in an address space. Clocks needs to\nbe enabled/disabled, and the MAC needs a reset, when the mux changes.\nSo the mux needs intimate knowledge of MAC.\n\n Andrew","headers":{"Return-Path":"","X-Original-To":"patchwork-incoming@ozlabs.org","Delivered-To":"patchwork-incoming@ozlabs.org","Authentication-Results":"ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=vger.kernel.org\n\t(client-ip=209.132.180.67; helo=vger.kernel.org;\n\tenvelope-from=netdev-owner@vger.kernel.org;\n\treceiver=)","Received":["from vger.kernel.org (vger.kernel.org [209.132.180.67])\n\tby ozlabs.org (Postfix) with ESMTP id 3y7S2D0Qbzz9t6D\n\tfor ;\n\tFri, 6 Oct 2017 09:22:44 +1100 (AEDT)","(majordomo@vger.kernel.org) by vger.kernel.org via listexpand\n\tid S1752036AbdJEWWT (ORCPT );\n\tThu, 5 Oct 2017 18:22:19 -0400","from vps0.lunn.ch ([185.16.172.187]:42140 \"EHLO vps0.lunn.ch\"\n\trhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP\n\tid S1751395AbdJEWWS (ORCPT );\n\tThu, 5 Oct 2017 18:22:18 -0400","from andrew by vps0.lunn.ch with local (Exim 4.84_2)\n\t(envelope-from )\n\tid 1e0EWl-0004WR-Pf; Fri, 06 Oct 2017 00:21:59 +0200"],"Date":"Fri, 6 Oct 2017 00:21:59 +0200","From":"Andrew Lunn ","To":"Rob Herring ","Cc":"Florian Fainelli ,\n\tCorentin Labbe ,\n\tmark.rutland@arm.com, maxime.ripard@free-electrons.com,\n\twens@csie.org, linux@armlinux.org.uk, catalin.marinas@arm.com,\n\twill.deacon@arm.com, peppe.cavallaro@st.com,\n\talexandre.torgue@st.com, frowand.list@gmail.com,\n\tnetdev@vger.kernel.org, devicetree@vger.kernel.org,\n\tlinux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,\n\tlinux-sunxi@googlegroups.com","Subject":"Re: [PATCH v6 11/11] of: mdio: Prevent of_mdiobus_register from\n\tscanning mdio-mux nodes","Message-ID":"<20171005222159.GO13247@lunn.ch>","References":"<20170927073414.17361-1-clabbe.montjoie@gmail.com>\n\t<20170927073414.17361-12-clabbe.montjoie@gmail.com>\n\t<20170927141213.GF13516@lunn.ch>\n\t\n\t<20171005220927.7rabn3ftvow253xj@rob-hp-laptop>","MIME-Version":"1.0","Content-Type":"text/plain; charset=us-ascii","Content-Disposition":"inline","In-Reply-To":"<20171005220927.7rabn3ftvow253xj@rob-hp-laptop>","User-Agent":"Mutt/1.5.23 (2014-03-12)","Sender":"netdev-owner@vger.kernel.org","Precedence":"bulk","List-ID":"","X-Mailing-List":"netdev@vger.kernel.org"}}]