From patchwork Wed Sep 12 07:51:08 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bartosz Golaszewski X-Patchwork-Id: 10596911 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 3A09313B8 for ; Wed, 12 Sep 2018 07:52:08 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 285CF29950 for ; Wed, 12 Sep 2018 07:52:08 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 1AB4D2995B; Wed, 12 Sep 2018 07:52:08 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 1AD2529950 for ; Wed, 12 Sep 2018 07:52:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Message-Id:Date: Subject: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=hazW2DqMrkwhfbUXsXVTZC22UR2a77UjB7ih2FsmfpQ=; b=Kwb AkK1NK3EArs2cM25C3M+5SZWI8vszFdYqB8IROZ7zpLI1FIoKLOQgbxAXqsGSSt+3ssVanN8zHsfG 3Hwcoc8T5NSpLReusBPqgRC4bDU9tcgKIpWuvvbudUCDB5wIXbxtqEbdz8e51KECnBQhqSiFFUJ+L 2RCrvYJSKI4mZULFvbnSrNlFOvWwWgww4pgClZlvXl40qXWzW9hfrQnSGe7ue1JpjCnRoBgQyFg4g tCaPOq9iUeIJoK1l55dFuean762NN9QwrcQ44YzMx+x52e+Zq/x14Eyt7SiZoY32M07L/lp9VqSwj 7L6GOUVV51ksphYZHBt7x8Iq6UyVkHQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1fzzwK-0004QV-Bv; Wed, 12 Sep 2018 07:51:56 +0000 Received: from mail-wm0-x22f.google.com ([2a00:1450:400c:c09::22f]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1fzzwF-0004LU-W3 for linux-arm-kernel@lists.infradead.org; Wed, 12 Sep 2018 07:51:54 +0000 Received: by mail-wm0-x22f.google.com with SMTP id t25-v6so1225086wmi.3 for ; Wed, 12 Sep 2018 00:51:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bgdev-pl.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id; bh=TJZEkVnSvAIA3IqHAOBx/ownWju+/i0MtjAf6LSOEBE=; b=biiWKRRv8fWa8di98ZGF+cGigmBkVpiLsK+oSDa44+53p68XevXsx8nWElVV8C9FeI IKKq8lGfIhRfpBulV+tGwoLTS1jRql+TGkgDeZeKhoKvznXU6UG9ig1YdXBlGAm+grMh z1iAfWC5jjDcZePN+MhbjfN07q69koyGqZSzkWNThlpsIT7B8FVdN2YgP1jSO5ClRiL6 I9IkAs1bFIKBAZNKDSI6IFyt4bVqtUx5LBqxzovXGw3VDoB1nwhax1HEHHOKJPCEG8N8 3od7xIAlkHRAKzOAvNs25LbbjtSstqDMBdlvHEMEbNyCzLEH8CgiVtpgV6DwgnkHYjGR G0QQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=TJZEkVnSvAIA3IqHAOBx/ownWju+/i0MtjAf6LSOEBE=; b=U0AgFHWkGNigU7yW/aRd8HZGBx+Yomw9nI7F8CMgOGlRkZcY+gdaSWyx2Lmgr4IgWS cIhdazP9/0HisCZm8p6WTlSQKvL0X9LPkCoreaClSCbQbGyxwhB5FOGQcsZ3bEDHRsa/ zRPDnzhmLAWcoStEmCQdbz46z48La/N0AVBSAYRJ4l6S/edjW4qJJYhiWySm/N1hIXMM 2MqZH3/++qTUc2mcWeAc/iZ6bTgYRFrLXclpe95rG6wJhZDoRkSSCYXWCQ5u1JentspV mgkMro+RCCnoBvFBToojQtoaZhck3yxVO9jWMIrvFY4yueHfr8f0wZ9qZS2BbSILLtDE zJuA== X-Gm-Message-State: APzg51AqZAfqKfQoO+EPTwlr8tn3ceAmDKMKwOokd4ocOUpzD36Xs7rN QFe8P7sr/HlwvW8rF/x7OFWUOw== X-Google-Smtp-Source: ANB0VdY6TgOoTSMyBjRuWb2GQXY1JIKjUJf+ppPRKE36sKh9vNuW9k0yIeTRmf18Wr5lHOcjTMfsIQ== X-Received: by 2002:a1c:c44a:: with SMTP id u71-v6mr758518wmf.43.1536738699724; Wed, 12 Sep 2018 00:51:39 -0700 (PDT) Received: from brgl-bgdev.lan (LFbn-MAR-1-609-89.w90-118.abo.wanadoo.fr. [90.118.185.89]) by smtp.gmail.com with ESMTPSA id l7-v6sm169341wrt.67.2018.09.12.00.51.38 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 12 Sep 2018 00:51:39 -0700 (PDT) From: Bartosz Golaszewski To: Srinivas Kandagatla , "David S . Miller" , Mauro Carvalho Chehab , Greg Kroah-Hartman , Andrew Morton , Arnd Bergmann , Jonathan Corbet , Sekhar Nori , Kevin Hilman , David Lechner , Boris Brezillon , Andrew Lunn , Alban Bedel , Maxime Ripard , Chen-Yu Tsai Subject: [PATCH v3 00/21] nvmem: rework of the subsystem for non-DT users Date: Wed, 12 Sep 2018 09:51:08 +0200 Message-Id: <20180912075129.25185-1-brgl@bgdev.pl> X-Mailer: git-send-email 2.18.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180912_005152_041891_7E92E8A0 X-CRM114-Status: GOOD ( 18.28 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Bartosz Golaszewski , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Bartosz Golaszewski This series contains nvmem framework changes prerequisite for further development of my previous series[1] that aims at removal of the platform data struct from at24 EEPROM driver. The patches are conceptually split into a couple groups. First five patches fix issues with existing issues. Patch 6 switches the nvmem providers to using kref which is necessary for removal of the return value from nvmem_unregister(). This is an approach similar to the one used in the clock framework where the provider is only removed after the last reference to it is dropped. Patches 7-9 convert last remaining users of nvmem_unregister() who still check its return value to using devm_nvmem_unregister() and patch 10 changes its return value from int to void. Patches 11-14 introduce the most significant changes of this series: we remove the global cell list, add support for static cell definitions external to the provider structure, change the way DT lookup works and allow to associate resources and consumers using lookup tables. The way nvmem_cell_get() for non-DT users is changed but there are no current users and it's currently broken anyway (cell being removed after a call to nvmem_cell_put()). Patch 15 updates the documentation. Patch 16 adds support for notifiers to nvmem so that users can subscribe for events such as device or cell registration or removal. Patches 17 & 18 add some minor improvements to the codebase. Last three patches contain fixes to warnings emitted by checkpatch. It's a good moment to add them if we're already touching a big part of the subsystem's code. Tested both DT and non-DT use cases. [1] https://lkml.org/lkml/2018/8/10/149 v1 -> v2: - extended the lookup structure with a proper con_id independent from the cell name defined in the cell definition table - added a patch that makes the naming convention for the cell name argument in the nvmem_cell_get() family of functions consistent - there were two users of nvmem_unregister() that still checked the return value, now switched to devm_nvmem_register() - fixed build failures reported by kbuild test robot v2 -> v3: - dropped the patch removing unused APIs and introduced changes on top of existing code instead - fixed nvmem provider reference decreasing in error paths - added checkpatch fixes - removed nvmem-machine.h and distributed new definitions among existing consumer and provider headers - reordered patches thematically - added more patches fixing issues in existing codebase Bartosz Golaszewski (21): nvmem: provide nvmem_dev_name() nvmem: remove the name field from struct nvmem_device nvmem: use list_for_each_entry_safe in nvmem_device_remove_all_cells() nvmem: remove a stray newline nvmem: check the return value of nvmem_add_cells() nvmem: use kref nvmem: lpc18xx_eeprom: use devm_nvmem_register() nvmem: sunxi_sid: use devm_nvmem_register() nvmem: mxs-ocotp: use devm_nvmem_register() nvmem: change the signature of nvmem_unregister() nvmem: remove the global cell list nvmem: add support for cell info nvmem: resolve cells from DT at registration time nvmem: add support for cell lookups from machine code Documentation: nvmem: document cell tables and lookup entries nvmem: add a notifier chain nvmem: use SPDX license identifiers nvmem: make the naming of arguments in nvmem_cell_get() consistent nvmem: use EOPNOTSUPP instead of ENOSYS nvmem: fix commenting style nvmem: use octal permissions instead of constants Documentation/nvmem/nvmem.txt | 31 ++ drivers/nvmem/core.c | 527 ++++++++++++++++++++++----------- drivers/nvmem/lpc18xx_eeprom.c | 6 +- drivers/nvmem/mxs-ocotp.c | 4 +- drivers/nvmem/sunxi_sid.c | 20 +- include/linux/nvmem-consumer.h | 100 +++++-- include/linux/nvmem-provider.h | 49 +-- 7 files changed, 497 insertions(+), 240 deletions(-)