From patchwork Fri Aug 11 01:36:03 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Golle X-Patchwork-Id: 13485 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:b824:0:b0:3f2:4152:657d with SMTP id z4csp809120vqi; Thu, 10 Aug 2023 19:20:49 -0700 (PDT) X-Google-Smtp-Source: AGHT+IFf75g6bI61lYhTRhU3BzAfGwReestFSl68nHgIDyz9L/n17t1RVaAvCVFWxQF6X1EYzavz X-Received: by 2002:a17:906:cc0e:b0:99b:dfd7:b0d3 with SMTP id ml14-20020a170906cc0e00b0099bdfd7b0d3mr496790ejb.56.1691720448719; Thu, 10 Aug 2023 19:20:48 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1691720448; cv=none; d=google.com; s=arc-20160816; b=wKoI2HhPY2Q3Ers07qHI4SP1MkcjsDx/MYEgUxzYyA64PPy0VPtRWW13tkwqCoT5E3 WwfS+XpjsKkCEwugmUwJU/JoFTVw9O332C/Mt+Acvp0tT8aaBmZAHiWWSzlEOamHLHur Y91Oixx4N2K+bysEvd6ssVho0eoy8WajoJ019DzvIWy15PAz/Rubn3DUX6cxZRzHqq0J bdWcbm3XvL93pKbDjWUoqaLMIUHbYjcnBT8AgX9gu4KpxS+5V6R+a9dmi6OLatTOQ2gu u4oVgewusO/2/wwpHanXKHaRKnfaNMO+ujXarRm+KqD8jwjMKU4K8X4Ma93DKhXHTMGg v0fQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-disposition:mime-version:message-id :subject:to:from:date; bh=ryGcDdohf21q8Noi+vxnh7JwDPCdiw0hP/cgoyrKrko=; fh=fqW8oMY9ydixFpWZdFhmrmd4m3lvFBw58fIoJyq/l8o=; b=bptc2xbQ+dMPmF6KJ3onh9LjOjRJ2HYDGWshtdDf+CiflBMI4f6EPQ1zJqsGy9eTdH WH7U7URL2Vxz19F6Nkq0lPqlYtdU/1jXCA9wtazd2pezAdU7rnBq4KJasJPVumVCSLX7 QUGhzuBH6JgbkKdwxNH2kCqepusOZQwDw95HjEp10QQblXIWxKbmQ1jcLjtqdzD45rb2 PNIjvNgzPuxxU4GMEk4dayOyLUrZzaUJCIuuOw7QxlUTkqBeGK2oYTnpU0kt/VOtapDz GVj6Ndtfvbmgl0O8hnnWsOEUkSadp1il6Z6cgq+b7yOJxvgl9QbwTGJ9DfXh9k+yfAZ+ IrOQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id br20-20020a170906d15400b00993cdec0182si2532711ejb.143.2023.08.10.19.20.24; Thu, 10 Aug 2023 19:20:48 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231851AbjHKBg7 (ORCPT + 99 others); Thu, 10 Aug 2023 21:36:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34776 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229468AbjHKBg6 (ORCPT ); Thu, 10 Aug 2023 21:36:58 -0400 Received: from pidgin.makrotopia.org (pidgin.makrotopia.org [185.142.180.65]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1A8B22D4F; Thu, 10 Aug 2023 18:36:55 -0700 (PDT) Received: from local by pidgin.makrotopia.org with esmtpsa (TLS1.3:TLS_AES_256_GCM_SHA384:256) (Exim 4.96) (envelope-from ) id 1qUH4h-00052h-2s; Fri, 11 Aug 2023 01:36:24 +0000 Date: Fri, 11 Aug 2023 02:36:03 +0100 From: Daniel Golle To: Randy Dunlap , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Daniel Golle , linux-mtd@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 0/8] mtd: ubi: allow UBI volumes to provide NVMEM Message-ID: MIME-Version: 1.0 Content-Disposition: inline X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1773897461505203337 X-GMAIL-MSGID: 1773897461505203337 The series is a follow-up and contains all patches of the previous series "mtd: ubi: behave like a good MTD citizen"[1] which was meant in preparation for implementing the NVMEM provider. The goal is to support embedded Linux devices which got NVMEM bits stored inside a UBI volume. Representing the UBI volume in the Device Tree, adding a phandle to be referenced by NVMEM consumers allows such devices to come up with their correct MAC addresses and device-specific Wi-Fi calibration data loaded. In order to be available for other drivers, attaching UBI devices has to be moved from late_initcall (which is too late for other drivers) to happen earlier. As an alternative to the existing kernel cmdline parameter the Device Tree property 'compatible = "linux,ubi";' inside an MTD partition can be used to have that MTD device attached as UBI device. MTD partitions which serve as UBI devices may have a "volumes" firmware subnode with volumes which may be compatible with "nvmem-cells". In this way, other drivers (think: Ethernet, Wi-Fi) can resolve and acquire NVMEM bits using the usual device tree phandle, just this time the NVMEM content is read from a UBI volume. [1]: https://patchwork.ozlabs.org/project/linux-mtd/list/?series=353177&state=%2A&archive=both Changes since v3: * dt-bindings fixes as requested Changes since v2: * include dt-bindings additions Changes since v1: * include patch to fix exiting Kconfig formatting issues * fix typo and indentation in Kconfig Daniel Golle (8): dt-bindings: mtd: add basic bindings for UBI dt-bindings: mtd: nvmem-cells: add support for UBI volumes mtd: ubi: block: don't return on error when removing mtd: ubi: block: use notifier to create ubiblock mtd: ubi: attach MTD partition from device-tree mtd: ubi: introduce pre-removal notification for UBI volumes mtd: ubi: populate ubi volume fwnode mtd: ubi: provide NVMEM layer over UBI volumes .../bindings/mtd/partitions/linux,ubi.yaml | 66 ++++++ .../bindings/mtd/partitions/nvmem-cells.yaml | 5 +- .../bindings/mtd/partitions/ubi-volume.yaml | 36 ++++ drivers/mtd/ubi/Kconfig | 12 ++ drivers/mtd/ubi/Makefile | 1 + drivers/mtd/ubi/block.c | 186 ++++++++++------- drivers/mtd/ubi/build.c | 160 +++++++++++---- drivers/mtd/ubi/cdev.c | 4 +- drivers/mtd/ubi/nvmem.c | 189 ++++++++++++++++++ drivers/mtd/ubi/ubi.h | 6 +- drivers/mtd/ubi/vmt.c | 32 +++ include/linux/mtd/ubi.h | 2 + 12 files changed, 579 insertions(+), 120 deletions(-) create mode 100644 Documentation/devicetree/bindings/mtd/partitions/linux,ubi.yaml create mode 100644 Documentation/devicetree/bindings/mtd/partitions/ubi-volume.yaml create mode 100644 drivers/mtd/ubi/nvmem.c