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 A50E9CCA473 for ; Wed, 15 Jun 2022 17:15:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350965AbiFORPT (ORCPT ); Wed, 15 Jun 2022 13:15:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53108 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344049AbiFORPS (ORCPT ); Wed, 15 Jun 2022 13:15:18 -0400 Received: from mail-pf1-x436.google.com (mail-pf1-x436.google.com [IPv6:2607:f8b0:4864:20::436]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9EC50338B9 for ; Wed, 15 Jun 2022 10:15:17 -0700 (PDT) Received: by mail-pf1-x436.google.com with SMTP id w21so12067945pfc.0 for ; Wed, 15 Jun 2022 10:15:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=message-id:date:mime-version:user-agent:subject:content-language:to :cc:references:from:in-reply-to:content-transfer-encoding; bh=nPsbkcbBeqbASqCJC2zl/rCrhRNAADIrDvak/nQhe9I=; b=zuUSSOBt4Ggjo0c6W+e3LgU4K8RLCr5F6HVZo7DVgpVZYW7riUD3FxWdyShRtnpMAd gD+qtluAXQsN8laYT3xeuEGuv0DrHBfYrgnttvxnqepG3/xslpnx+osllE93T4ST88+O dIe7oLe58IH8oAe+ScDXmlcmYTfJ9RDysO8JM7xTGO60AeiL7d/EEKC6DfZrssuCns49 mItlwhRGLv2lcbNJNAVRzp+SeGobY19ZlGiy7IT/Ey3N4z2nBpIGc7xwYJBLLEnr4DyG FGroZZaSzoHw6OS3i0d2hE3+1Y6EdBwec+ShpWaU5IDziPGTWyEAk97HswqN9AILr/8u xaSw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:date:mime-version:user-agent:subject :content-language:to:cc:references:from:in-reply-to :content-transfer-encoding; bh=nPsbkcbBeqbASqCJC2zl/rCrhRNAADIrDvak/nQhe9I=; b=hQMSs0PEDuWvkA9+cp3NXjyFexSvfLVkszxqxlNMUqwhjLpiVOhm/L28owrh9fs6Qw T2L/B9uKVF+sKweyhsjk26jFTfxX9lpi58r9M8VVsRbqtB8uCKy1kloyBsxp1RHf5fYJ 01JwUXM3tf4RzDn6G3Fc76kBwWg3cS1KbfHsMtc62cDlQJQIiBPAKrxR+seh4uHNkCZs t7weSjy2znxD0YkbHMibSlbW6RBBK66ZXxX+DPCSs06wMqZZIV0OTm8fGWJY2bUnKsor XrypFKnnRbdvA36bWGQFzwNaJ6Hnoj4Zijmzm+kARJ+Ke7+D2j+kTIo3m+4shRJ40ppk d3EA== X-Gm-Message-State: AJIora+LJ4pJpjnASPO0MqEAlZ2lmc+I/w7SLBn9pJj30UWyBlxohYOS Mkn9Nr4pX9gc1ev64AigE/9Arw== X-Google-Smtp-Source: AGRyM1tYcSNkOShX6GUjY540L3XsgD4qhnoZ7s0AKq1KR4hZIS/RVxyoI7gWFkGA1LbJjPUi1Gog6w== X-Received: by 2002:a63:e517:0:b0:3fe:4273:1063 with SMTP id r23-20020a63e517000000b003fe42731063mr672021pgh.371.1655313317162; Wed, 15 Jun 2022 10:15:17 -0700 (PDT) Received: from [172.22.33.138] ([192.77.111.2]) by smtp.gmail.com with ESMTPSA id h30-20020aa79f5e000000b00519cfca8e30sm10153151pfr.209.2022.06.15.10.15.15 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 15 Jun 2022 10:15:16 -0700 (PDT) Message-ID: <12e3bb72-af2d-653f-b342-c6b4d6a1f292@linaro.org> Date: Wed, 15 Jun 2022 10:15:15 -0700 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.10.0 Subject: Re: [PATCH v1 0/5] power: domain: Add driver for a PM domain provider which controls Content-Language: en-US To: Max Krummenacher , Geert Uytterhoeven Cc: Rob Herring , Max Krummenacher , Ulf Hansson , Linux PM list , Francesco Dolcini , Mark Brown , "Rafael J . Wysocki" , Kevin Hilman , Andrejs Cainikovs , Biju Das , Bjorn Andersson , Catalin Marinas , Dmitry Baryshkov , Fabio Estevam , Geert Uytterhoeven , Krzysztof Kozlowski , Marcel Ziswiler , NXP Linux Team , Pengutronix Kernel Team , Sascha Hauer , Shawn Guo , Vinod Koul , Will Deacon , "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" , Linux ARM , Linux Kernel Mailing List References: <20220609150851.23084-1-max.oss.09@gmail.com> <20220613191549.GA4092455-robh@kernel.org> From: Krzysztof Kozlowski In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org On 15/06/2022 09:10, Max Krummenacher wrote: > Hi > > On Tue, Jun 14, 2022 at 9:22 AM Geert Uytterhoeven wrote: >> >> Hi Rob, >> >> On Mon, Jun 13, 2022 at 9:15 PM Rob Herring wrote: >>> On Thu, Jun 09, 2022 at 05:08:46PM +0200, Max Krummenacher wrote: >>>> From: Max Krummenacher >>>> >>>> its power enable by using a regulator. >>>> >>>> The currently implemented PM domain providers are all specific to >>>> a particular system on chip. >>> >>> Yes, power domains tend to be specific to an SoC... 'power-domains' is >>> supposed to be power islands in a chip. Linux 'PM domains' can be >>> anything... > > I don't see why such power islands should be restricted to a SoC. You can > build the exact same idea on a PCB or even more modular designs. In the SoC these power islands are more-or-less defined. These are real regions gated by some control knob. Calling few devices on a board "power domain" does not make it a power domain. There is no grouping, there is no control knob. Aren't you now re-implementing regulator supplies? How is this different than existing supplies? Best regards, Krzysztof