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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2BA3CC433FE for ; Wed, 9 Nov 2022 22:59:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231185AbiKIW7v (ORCPT ); Wed, 9 Nov 2022 17:59:51 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53030 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230073AbiKIW7u (ORCPT ); Wed, 9 Nov 2022 17:59:50 -0500 Received: from mail-wm1-x334.google.com (mail-wm1-x334.google.com [IPv6:2a00:1450:4864:20::334]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3E29F11C36; Wed, 9 Nov 2022 14:59:49 -0800 (PST) Received: by mail-wm1-x334.google.com with SMTP id v7so117567wmn.0; Wed, 09 Nov 2022 14:59:49 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=swcrtWEk/pjEDFJKOi6muSLrFWlp8giizOyeDdjr3QI=; b=qgV5InPtVbonJaw0kv4ZbCSPNUG0xf4Pn9GME0tsiZ0IUqaOWghUYHueI4ljO6Po1T o4irPUC5EKmGrtN2mrzJF2gFRCiwSyOxJRriuGI96ZjO5Siks+qR8efhjNt9GRubLaik KgyWYE447kS3+rmtz5QuDgEmy7LzOQ50dH7ns8itJ5M8mT+n1FVvbR33jD+XIU9TNOlR 6VD7WdQkVPWhcqH4M7OEaadnw9LR+yTrKE3XVtepyRZ82Ph4VacvfwmoWmnn0zcDYlFi 1plh0u6lKqfAeTB/C4spDO4eqcFBbGJWFcJNDntsA8fgeO2LE7GOoSgCfo3oKvVar0q1 xTYQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=swcrtWEk/pjEDFJKOi6muSLrFWlp8giizOyeDdjr3QI=; b=q7/mLo3GTiUcp36bsQWKGt4YEiUwUVndgft6eFUv1QSdAzDC2Ev1X8jZWWEJVY72tQ ZUOwgl/r+PR4QxPnIdVXavspBdqVXiBDV1hBlY33Vzw4TWlzRRuRBzGX/2BUCK6rXFf9 ZWuanZxmrWrIuHjj3D/G1jsXrzH7u4Qbknhq5oEQqhll3UnDl0R/5ZqjETB/El5Vaqx7 PQjDuzhdM0Gm7ZmTCODYICCvjOLNaz48F3dARkE5HWb1c1GLhr8u/V1+oCb5bNuHp9sp mnGS3cpxwX5riE/GJj9psRCApGXkwuhKOLAjSc9icPK8LA0OmCByPz/8n/aVl3VRtSP4 5Y/A== X-Gm-Message-State: ANoB5pksH2yFvz3egQRtCaEf3Fim/2YlGTalqTRocHIPP3BevBuh0xuK l3Uv0XzWIEIbbt/y1rbEBhs= X-Google-Smtp-Source: AA0mqf79cVkwjf7QQCHzuNa6IK4Sqr+HRH2GA9ig8lczx/Yt8P39Cw2PM+3pWIS8kfcqXPHw8pEUMQ== X-Received: by 2002:a05:600c:3393:b0:3cf:b30a:e202 with SMTP id o19-20020a05600c339300b003cfb30ae202mr9650192wmp.91.1668034787609; Wed, 09 Nov 2022 14:59:47 -0800 (PST) Received: from skbuf ([188.27.184.197]) by smtp.gmail.com with ESMTPSA id q10-20020adff94a000000b0022e035a4e93sm13982413wrr.87.2022.11.09.14.59.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 09 Nov 2022 14:59:47 -0800 (PST) Date: Thu, 10 Nov 2022 00:59:44 +0200 From: Vladimir Oltean To: Sean Anderson Cc: Heiner Kallweit , Russell King , netdev@vger.kernel.org, Eric Dumazet , Paolo Abeni , Jakub Kicinski , linux-kernel@vger.kernel.org, Andrew Lunn , Ioana Ciornei , Madalin Bucur , "David S . Miller" , Alexandre Belloni , Benjamin Herrenschmidt , Claudiu Manoil , Florian Fainelli , Frank Rowand , Krzysztof Kozlowski , Li Yang , Michael Ellerman , Paul Mackerras , Rob Herring , Saravana Kannan , Shawn Guo , UNGLinuxDriver@microchip.com, Vivien Didelot , Vladimir Oltean , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org Subject: Re: [PATCH net-next v2 00/11] net: pcs: Add support for devices probed in the "usual" manner Message-ID: <20221109225944.n5pisgdytex5s6yk@skbuf> References: <20221103210650.2325784-1-sean.anderson@seco.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20221103210650.2325784-1-sean.anderson@seco.com> Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org On Thu, Nov 03, 2022 at 05:06:39PM -0400, Sean Anderson wrote: > For a long time, PCSs have been tightly coupled with their MACs. For > this reason, the MAC creates the "phy" or mdio device, and then passes > it to the PCS to initialize. This has a few disadvantages: > > - Each MAC must re-implement the same steps to look up/create a PCS > - The PCS cannot use functions tied to device lifetime, such as devm_*. > - Generally, the PCS does not have easy access to its device tree node Is there a clear need to solve these disadvantages? There comes extra runtime complexity with the PCS-as-device scheme (plus the extra complexity needed to address the DT backwards compatibility problems it causes; not addressed here).