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 X-Spam-Level: X-Spam-Status: No, score=-5.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BDD8CC6369E for ; Mon, 16 Nov 2020 17:04:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7D8312222C for ; Mon, 16 Nov 2020 17:04:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732406AbgKPREc (ORCPT ); Mon, 16 Nov 2020 12:04:32 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40570 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726236AbgKPREc (ORCPT ); Mon, 16 Nov 2020 12:04:32 -0500 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E69D4C0613CF for ; Mon, 16 Nov 2020 09:04:31 -0800 (PST) Received: from gallifrey.ext.pengutronix.de ([2001:67c:670:201:5054:ff:fe8d:eefb] helo=[IPv6:::1]) by metis.ext.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1kehvX-0000mC-Qt; Mon, 16 Nov 2020 18:04:27 +0100 Subject: Re: [PATCH v3 0/2] nvmem: skip nodes with compatibles other than "nvmem-cell" From: Ahmad Fatoum To: Rob Herring , Srinivas Kandagatla Cc: devicetree@vger.kernel.org, ceggers@arri.de, linux-kernel@vger.kernel.org, kernel@pengutronix.de References: <20200428111829.2215-1-a.fatoum@pengutronix.de> <20200512141834.GA3023@bogus> <3f050e96-8bd3-a77e-b1cf-1739a1be0c2d@pengutronix.de> Message-ID: Date: Mon, 16 Nov 2020 18:04:26 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.3.1 MIME-Version: 1.0 In-Reply-To: <3f050e96-8bd3-a77e-b1cf-1739a1be0c2d@pengutronix.de> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-SA-Exim-Connect-IP: 2001:67c:670:201:5054:ff:fe8d:eefb X-SA-Exim-Mail-From: a.fatoum@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: devicetree@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Hello Rob, Hello Srini, On 02.11.20 16:23, Ahmad Fatoum wrote: >>> I think instead, nvmem cells should be contained within a partition. >>> The partition should then have a compatible to indicate it contains >>> nvmem cells. >> >> I thought I had understood what needs to be done, but now that I finally have time >> to do it, I see that this only solves the second issue "extending the NVMEM binding >> to nodes that already have other child nodes, e.g., MTD and its partitions". >> >> The first issue: "future extension of e.g. eeprom nodes by any child nodes other than >> nvmem cells" isn't solved by having a containing partition. >> >> >> My issue is that the bootloader fixes up a partitions { compatible = "fixed-partitions"; } >> child node into the kernel device tree. The NVMEM core driver tries to parse all eeprom child >> nodes as cells and will make the driver probe of the EEPROM fail, because it can't parse that >> fixed-partitions node as a nvmem cell. >> >> To allow for co-existence of NVMEM cells and other subnodes, would following patch be >> acceptable to you and Srini? > > Gentle ping. Would the patch below be acceptable? Did you have time to look at this? > >> >> ---------------------------------------- 8< -------------------------------------- >> --- a/Documentation/devicetree/bindings/nvmem/nvmem.yaml >> +++ b/Documentation/devicetree/bindings/nvmem/nvmem.yaml >> @@ -45,7 +45,15 @@ properties: >> patternProperties: >> "^.*@[0-9a-f]+$": >> type: object >> - >> + if: >> + not: >> + properties: >> + compatible: >> + then: >> + $ref: "#/definitions/nvmem-cell" >> + >> +definitions: >> + nvmem-cell: >> properties: >> reg: >> maxItems: 1 > > Cheers, > Ahmad > -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |