From patchwork Sat Oct 22 21:13:17 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?UmFmYcWCIE1pxYJlY2tp?= X-Patchwork-Id: 617499 Delivered-To: patch@linaro.org Received: by 2002:a17:522:c983:b0:460:3032:e3c4 with SMTP id kr3csp1803565pvb; Sat, 22 Oct 2022 14:14:20 -0700 (PDT) X-Google-Smtp-Source: AMsMyM60IdZ28V2+41GiXxF/QElqwH6hkAF0ENj+7cPhif5pM18Q7+yTkFFfXWTUR/+3z4YMCbxn X-Received: by 2002:a63:6948:0:b0:46e:af43:14a4 with SMTP id e69-20020a636948000000b0046eaf4314a4mr10596565pgc.391.1666473260168; Sat, 22 Oct 2022 14:14:20 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1666473260; cv=none; d=google.com; s=arc-20160816; b=WC0ltinTdTiC0804oqjFCO9GttDLoiABdRktivbZwI7l58Wq0rPTOar0/XM7XSyit4 d9AdmgPOyy3RopNjBETUilZsKae37N9aBxEsmVLng6dfiEfOIjaFPFhGC61/1HTn2vXD PaqvPRPKx3Wd+d6YhnLuPsDhq5qSrmGgO9uPSUA1WJBSJ2pAaZcxQ73P//lNkV18zDkF QmToLQ4P6mCR/nuq7pa6Ms7BXcYtuQ9ZCFPqvRj/Tggdjy5+5FPmeuV0rVmG2s8JznSQ aoEQA8lQJHXze6QlQFVK6YRBZhryqjbaBNlUlqqdzQ8nlbHf2MTLEBY9qLgzCgBfRC4p 8hqg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=errors-to:sender:content-transfer-encoding:list-subscribe:list-help :list-post:list-archive:list-unsubscribe:list-id:precedence :mime-version:message-id:date:subject:cc:to:from:dkim-signature :dkim-signature; bh=374hRwSmZkevQ4AI0K6sO5+2PGRce7OZqN6zJqlIYPU=; b=qwllge7OP/fKfd9uG5TsYtHgfMgbv0ClFaAXQ7XIkRCweEXIsEz9W16QRTGejLT/XB eh2eRrkDpy+n5yiN60Ogig7z6tQ5csQWAbBCpcp0fi/mb0eQ1xqPEiCLda3s7DiXYN41 iMboN/jY2svw04Lpz9tQMJBidt7n+3fcW1FZk/h9YhVlWNr/jhPwCN5DJSXgw6+HaidG UHD1jE2A6qLqV3vOeW9j6By1g9l3+Sg1Glf7plklJFiY4wnokSRGrSoCchR9NsJWdPvH y+BuRT1Q1meNhSlOWMlAjRiwVdmqxkp+rZvOKuGBL0g0kZD8KI89A2/PYQjkn3byYfB9 SchQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@lists.infradead.org header.s=bombadil.20210309 header.b=b94xzeFc; dkim=neutral (body hash did not verify) header.i=@gmail.com header.s=20210112 header.b=NmBEE6eF; spf=pass (google.com: best guess record for domain of linux-mtd-bounces+patch=linaro.org@lists.infradead.org designates 2607:7c80:54:3::133 as permitted sender) smtp.mailfrom="linux-mtd-bounces+patch=linaro.org@lists.infradead.org"; dmarc=fail (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Return-Path: Received: from bombadil.infradead.org (bombadil.infradead.org. [2607:7c80:54:3::133]) by mx.google.com with ESMTPS id w63-20020a638242000000b0046ec9d1ffc7si5363808pgd.692.2022.10.22.14.14.19 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 22 Oct 2022 14:14:20 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-mtd-bounces+patch=linaro.org@lists.infradead.org designates 2607:7c80:54:3::133 as permitted sender) client-ip=2607:7c80:54:3::133; Authentication-Results: mx.google.com; dkim=pass header.i=@lists.infradead.org header.s=bombadil.20210309 header.b=b94xzeFc; dkim=neutral (body hash did not verify) header.i=@gmail.com header.s=20210112 header.b=NmBEE6eF; spf=pass (google.com: best guess record for domain of linux-mtd-bounces+patch=linaro.org@lists.infradead.org designates 2607:7c80:54:3::133 as permitted sender) smtp.mailfrom="linux-mtd-bounces+patch=linaro.org@lists.infradead.org"; dmarc=fail (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:Cc :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=374hRwSmZkevQ4AI0K6sO5+2PGRce7OZqN6zJqlIYPU=; b=b94xzeFcdojMsw hD3E5H3JFg4X/jERkL691Sj09DSQGsvUeckBWGljPObNQ2H61dF48Vt8fY8FzZhzDuaFYWt6Nh9I3 N451qOqb5kwEJxeFFkm/CLN0oLObwbG06DKvMrZZ6IQh6BGP8Y6TFG2YuEcTu3xORHcHPy/YHUY01 8CSOQTpcj/jcg90tftHBTiw9JBMXPGA6tKYCXDkl9S32mICbdeuRtRJ7BZBakP77/BHD+txdGOvuO ZVl1tetLyN6c1YNRkQNKAHLfkLkS209V/Z3/q1rgh9uj5X1Qe60q0dNEQkyGX1bF40Uj2kWzKyCMK 2BwV6kzZU766qBb7Df5w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1omLoA-00DpBI-7a; Sat, 22 Oct 2022 21:13:30 +0000 Received: from mail-ed1-x52a.google.com ([2a00:1450:4864:20::52a]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1omLo7-00DpA9-4A for linux-mtd@lists.infradead.org; Sat, 22 Oct 2022 21:13:28 +0000 Received: by mail-ed1-x52a.google.com with SMTP id a5so5048373edb.11 for ; Sat, 22 Oct 2022 14:13:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=C5hHs2S/RQl/JXIwHudGm/5mav5RsuOJ5skKbHJaT7M=; b=NmBEE6eFFqAk065UYolm1o7PT0D3spxPjIpTB1GN4doSOzS/VyF0MqEGtviFaTzcZc kkyskhusTgRHUEXA+SUJWNZZZMtBpySOqUoLqvRB5ZBLRjhEc9KjhLe9c5jK8ry4uTV2 Nk789OK4t4+qNfxNc4QY99Syb9ofJ5Ow89nccso5G+zA4tp0VGicKZTAp9x+JY0nIJAz F+e7O3kIGx94sm6tXjxLuCdaD+lqhx63E8T/5sM8hYbr3w3szKdM8Thn11CAbYOPpln1 t8lbqWF+RU+6NYlfHw/1fmuOYBoXOLkZUGM3TezeU14AoBjoAJHSGDkc9AdSC9EA9b48 y46Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=C5hHs2S/RQl/JXIwHudGm/5mav5RsuOJ5skKbHJaT7M=; b=8NDmEmY7D7r6zfKFjyIb1gcU/2imYnCmkUBpPWjZPFh1BqN1SQC8wJFe3jaXlktbeg 4SZL7rNNexfUf6N0ZQP6ozii2wCLBn3pVyF7niZAOwCVGoEAgcBw6GomL3emSnmAu8qx kkKVMISyA4jd9BDgMtEGtDUbAALeVQ/dmmqMTwGpM63K4WlN4v3th5A40quKbhLrDbPW 5eV2ultKpW7nuMIPQskd6UvGN3KM9np7VQYLim7CZefLvB0VTLwnliSzqm9mTVqGA4Hq AS1dea+gWBScMiEGr3x/yARWZmLYwK3AcsdEzqzdbRIdzSfBQN/aK+MXr/s5kvOUg43c gNcQ== X-Gm-Message-State: ACrzQf0sS/YU8N5ZLDrMhjmSDxXHZbJkwxdKNWBKVIamUpkdEnu87Gvq WAYGwyWa51YGdQrJSVkSsZo= X-Received: by 2002:a17:907:3f23:b0:78e:260a:fc33 with SMTP id hq35-20020a1709073f2300b0078e260afc33mr21579377ejc.152.1666473203739; Sat, 22 Oct 2022 14:13:23 -0700 (PDT) Received: from localhost.lan (ip-194-187-74-233.konfederacka.maverick.com.pl. [194.187.74.233]) by smtp.gmail.com with ESMTPSA id la5-20020a170907780500b0077f20a722dfsm13382584ejc.165.2022.10.22.14.13.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 22 Oct 2022 14:13:23 -0700 (PDT) From: =?utf-8?b?UmFmYcWCIE1pxYJlY2tp?= To: Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Rob Herring , Krzysztof Kozlowski Cc: Mikhail Zhilkin , Christian Marangi , Wolfram Sang , Chaitanya Kulkarni , "Martin K . Petersen" , Jens Axboe , Andrew Morton , linux-mtd@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, =?utf-8?b?UmFmYcWCIE1pxYJlY2tp?= Subject: [PATCH V3 1/2] dt-bindings: mtd: partitions: support marking rootfs partition Date: Sat, 22 Oct 2022 23:13:17 +0200 Message-Id: <20221022211318.32009-1-zajec5@gmail.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221022_141327_232382_2C5A7959 X-CRM114-Status: GOOD ( 12.64 ) X-Spam-Score: 0.1 (/) X-Spam-Report: =?utf-8?q?Spam_detection_software=2C_running_on_the_system_?= =?utf-8?q?=22bombadil=2Einfradead=2Eorg=22=2C?= =?utf-8?q?_has_NOT_identified_this_incoming_email_as_spam=2E__The_original?= =?utf-8?q?_message_has_been_attached_to_this_so_you_can_view_it_or_label?= =?utf-8?q?_similar_future_email=2E__If_you_have_any_questions=2C_see?= =?utf-8?q?_the_administrator_of_that_system_for_details=2E?= =?utf-8?q?_?= =?utf-8?q?_Content_preview=3A__From=3A_Rafa=C3=85=C2=82_Mi=C3=85=C2=82ecki_L?= =?utf-8?q?inux_needs_to_know_what_to_use_as_root?= =?utf-8?q?_device=2E_On_embedded_devices_with_flash_the_only_common_way_to_s?= =?utf-8?q?pecify_that?= =?utf-8?q?_is_cmdline_=26_root=3D_parameter=2E_That_solution_works_with_U-Bo?= =?utf-8?q?ot_which_is_Linux?= =?utf-8?q?_=26_cmdline_aware_but_isn=27t_available_with_all_market_bootloade?= =?utf-8?q?rs=2E_Also_that?= =?utf-8?q?_method_is_fragile=3A_1=2E_Requires_specific_probing_order_on_mult?= =?utf-8?q?i-flash_devices?= =?utf-8?b?IDIgWy4uLl0g?= =?utf-8?q?_?= =?utf-8?q?_Content_analysis_details=3A___=280=2E1_points=2C_5=2E0_required?= =?utf-8?q?=29?= =?utf-8?q?_?= =?utf-8?q?_pts_rule_name______________description?= =?utf-8?q?_----_----------------------_-------------------------------------?= =?utf-8?q?-------------?= =?utf-8?q?_-0=2E0_RCVD=5FIN=5FDNSWL=5FNONE_____RBL=3A_Sender_listed_at_https?= =?utf-8?q?=3A//www=2Ednswl=2Eorg/=2C?= =?utf-8?q?_no_trust?= =?utf-8?b?IFsyYTAwOjE0NTA6NDg2NDoyMDowOjA6MDo1MmEgbGlzdGVkIGluXQ==?= =?utf-8?b?IFtsaXN0LmRuc3dsLm9yZ10=?= =?utf-8?q?_-0=2E0_SPF=5FPASS_______________SPF=3A_sender_matches_SPF_record?= =?utf-8?q?_0=2E0_SPF=5FHELO=5FNONE__________SPF=3A_HELO_does_not_publish_an_?= =?utf-8?q?SPF_Record?= =?utf-8?q?_0=2E0_FREEMAIL=5FFROM__________Sender_email_is_commonly_abused_en?= =?utf-8?q?duser_mail?= =?utf-8?q?_provider?= =?utf-8?q?_=5Bzajec5=5Bat=5Dgmail=2Ecom=5D?= =?utf-8?q?_0=2E2_FREEMAIL=5FENVFROM=5FEND=5FDIGIT_Envelope-from_freemail_use?= =?utf-8?q?rname_ends?= =?utf-8?q?_in_digit?= =?utf-8?q?_=5Bzajec5=5Bat=5Dgmail=2Ecom=5D?= =?utf-8?q?_-0=2E1_DKIM=5FVALID=5FAU__________Message_has_a_valid_DKIM_or_DK_?= =?utf-8?q?signature_from?= =?utf-8?q?_author=27s_domain?= =?utf-8?q?_-0=2E1_DKIM=5FVALID_____________Message_has_at_least_one_valid_DK?= =?utf-8?q?IM_or_DK_signature?= =?utf-8?q?_0=2E1_DKIM=5FSIGNED____________Message_has_a_DKIM_or_DK_signature?= =?utf-8?q?=2C_not_necessarily?= =?utf-8?q?_valid?= =?utf-8?q?_-0=2E1_DKIM=5FVALID=5FEF__________Message_has_a_valid_DKIM_or_DK_?= =?utf-8?q?signature_from?= =?utf-8?q?_envelope-from_domain?= X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-mtd" Errors-To: linux-mtd-bounces+patch=linaro.org@lists.infradead.org From: Rafał Miłecki Linux needs to know what to use as root device. On embedded devices with flash the only common way to specify that is cmdline & root= parameter. That solution works with U-Boot which is Linux & cmdline aware but isn't available with all market bootloaders. Also that method is fragile: 1. Requires specific probing order on multi-flash devices 2. Uses hardcoded partitions indexes A lot of devices use different partitioning methods. It may be "fixed-partitions" or some dynamic partitioning (e.g. based on parts table). For such cases allow "linux,rootfs" property to mark correct flash partition. Signed-off-by: Rafał Miłecki Reviewed-by: Rob Herring --- V2: Use "linux,rootfs" as more accurate. Thanks Rob. --- .../devicetree/bindings/mtd/partitions/fixed-partitions.yaml | 1 + .../devicetree/bindings/mtd/partitions/partition.yaml | 4 ++++ 2 files changed, 5 insertions(+) diff --git a/Documentation/devicetree/bindings/mtd/partitions/fixed-partitions.yaml b/Documentation/devicetree/bindings/mtd/partitions/fixed-partitions.yaml index ad3ccd250802..d66a6e3bcb56 100644 --- a/Documentation/devicetree/bindings/mtd/partitions/fixed-partitions.yaml +++ b/Documentation/devicetree/bindings/mtd/partitions/fixed-partitions.yaml @@ -84,6 +84,7 @@ examples: partition@0 { label = "filesystem"; reg = <0x00000000 0x1 0x00000000>; + linux,rootfs; }; }; diff --git a/Documentation/devicetree/bindings/mtd/partitions/partition.yaml b/Documentation/devicetree/bindings/mtd/partitions/partition.yaml index f1a02d840b12..a25cd23a34c0 100644 --- a/Documentation/devicetree/bindings/mtd/partitions/partition.yaml +++ b/Documentation/devicetree/bindings/mtd/partitions/partition.yaml @@ -52,6 +52,10 @@ properties: immune to paired-pages corruptions type: boolean + linux,rootfs: + description: Marks partition that contains root filesystem to mount and boot + user space from + if: not: required: [ reg ]