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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 809ECC44536 for ; Wed, 22 Jul 2026 13:08:05 +0000 (UTC) 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:In-Reply-To:References:To:From:Cc: Subject:Message-Id:Date:Mime-Version:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=ZrrPjI6M9jOVz1dI8L9w6WDCWK54XQ2m0T9lZpjeioQ=; b=T2/AJZg2iT47qv Pd9YyLBKHubkNqZZ0mRJMfSCGpYwCkHoGbluUdZz9nA6jXGmdcCFuUpf9F1KQtjdaD3twXxWYzpnT O2uGEq+UQ2LdeMgpY2YxZJJIHSwIMl2bJdEypCYsITLFCeKgjP6K/Sdnqs10c9jtHjcocPL9yAjJF 3JbPi6Hq5JvyzBBLRZk0R1/JPToRwHFV0kjaVsSiTLte1jmKUkfZWpoXaHqCJRnfYrcaCNKPb8VBB eJTI7PBXH6igGhylf8oEWre+VNRzuNBEuzBGgXPh5KJsL+L2CQ4M9hcGvS6BNEwQxqXxDDbL3BuGF 0GAwjQViWMxs88Bn8JHQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wmWg7-0000000Br7O-0InU; Wed, 22 Jul 2026 13:08:03 +0000 Received: from 0001.3ffe.de ([159.69.201.130] helo=mail.3ffe.de) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wmWfu-0000000Br0R-2AHN for linux-mtd@lists.infradead.org; Wed, 22 Jul 2026 13:08:01 +0000 Received: from localhost (unknown [IPv6:2a02:810b:4320:1000:4685:ff:fe12:5967]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mail.3ffe.de (Postfix) with ESMTPSA id B8CBD507; Wed, 22 Jul 2026 15:07:46 +0200 (CEST) Mime-Version: 1.0 Date: Wed, 22 Jul 2026 15:07:46 +0200 Message-Id: Subject: Re: [PATCH 02/30] mtd: spi-nor: winbond: Normalize names Cc: "Pratyush Yadav" , "Takahiro Kuwano" , "Richard Weinberger" , "Vignesh Raghavendra" , "Thomas Petazzoni" , "Steam Lin" , , From: "Michael Walle" To: "Miquel Raynal" X-Mailer: aerc 0.20.0 References: <20260529-winbond-v7-1-spi-nor-jv-cleanup-v1-0-87e5d3122244@bootlin.com> <20260529-winbond-v7-1-spi-nor-jv-cleanup-v1-2-87e5d3122244@bootlin.com> <878q73jif0.fsf@bootlin.com> In-Reply-To: <878q73jif0.fsf@bootlin.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260722_060750_715605_E4F70E8C X-CRM114-Status: GOOD ( 13.99 ) 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org Hi Miquel, On Wed Jul 22, 2026 at 2:52 PM CEST, Miquel Raynal wrote: >>> As a result, W25Q01NWxxIQ is irrelevant and would better be named >>> W25Q01NW-Q, W25Q02JV is irrelevant and would better be named W25Q02JV-M, >>> etc. >> >> OTOH if you try to search for that name on the internet/datasheets >> you don't find anything, while the xx somehow indicates that >> something is missing here. > > The datasheet is often the same for N/Q/M variants, a table close to the > end mentions the differences. The intermediate letters have no useful > meaning for us and IIRC they number may vary. The meanging is: > > - W: Winbond > - 25Q: SPI NOR family > - 02J: Density > - V: Voltage level > - Useless information for software support such as the package > size or some ratings which have no impact on the software, the > absence of lead, etc. > - And then there are subtleties such as features available or > not, enabled by default or not, which can be disabled or not, > that is carried by the last letter. I get that, but still, that part name "W25Q01NW-Q" simply doesn't exist. I've argued with Tudor years ago, since he wanted me to use a similar naming (w25q32jwm). I mean I don't care to much. It's like I've said, you won't find anything about that on the web, as the name is made up by us :) -michael ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/