From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtpout-02.galae.net (smtpout-02.galae.net [185.246.84.56]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 99B4B370D4D for ; Wed, 22 Jul 2026 15:19:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.246.84.56 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784733600; cv=none; b=L/s1O7i8i4jzyKa+W95UwhjkVm1tfl8pAWDaZU07Ivf2HkqII38ktD0064bp2ZsIKdIBAZOqQndck8a9DaX8VBU1Q/EgMCGuEMaYVvdDp1Lgf4Zla2HE6hYAwp4WaW8IzbuxZdea2v+vRLNNRxkrJhP8JuaPmjymeeQzyRhkHxk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784733600; c=relaxed/simple; bh=7/NFzUdZfC/6H4a1Um+8GuY78RzQuK7Fa16BhcEnbhI=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=TsxnPKMSTHmZa0G5Fy0EZo3TpBX8z2yckYl2L3nKZMiDb6clK1dhUDCTMOd+EKWt4qIzQuw6i1FW56K4QBAAbXR9kQaUO3rBUhOrEd1c6TZOoTtrTkCiI7uFfsIDfECbvcqZxid75vBeSosAH8gQxuxAtdIeV9X8OflHfItsiAc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=AW0bpR7t; arc=none smtp.client-ip=185.246.84.56 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="AW0bpR7t" Received: from smtpout-01.galae.net (smtpout-01.galae.net [212.83.139.233]) by smtpout-02.galae.net (Postfix) with ESMTPS id 440EA1A116B; Wed, 22 Jul 2026 15:19:54 +0000 (UTC) Received: from mail.galae.net (mail.galae.net [212.83.136.155]) by smtpout-01.galae.net (Postfix) with ESMTPS id 1733760388; Wed, 22 Jul 2026 15:19:54 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 82FD911BD2234; Wed, 22 Jul 2026 17:19:51 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim; t=1784733593; h=from:subject:date:message-id:to:cc:mime-version:content-type: in-reply-to:references; bh=4AtK/QMggaWIJppHcimsREGdYEKGXbtDT2MVjp8qhwI=; b=AW0bpR7tUkZhucA0dI/s38f6DpI1Z8ysbli9g2hv0BrcyIM+nIunEVL5qOfZsiqxL84Gxf u6eLe19TRefLg3VKLdARRudGqvjoeHbXdDgB9YC936AR41hXNF3b2mJw8xD3L3+frp6B7V BcGpKoVNStskjPN6DhvgCwj45L8kj/2I7RUnPgy1b//wpgf1YLQs1n9JcigOqDM/yuzqoQ tXMGPGvDyQPmc9BSyl8JrcuAYBc0iGosh5bjzCYIDJ+PHJPz8DZczmGsr2o46SqXXTHckA WvipzNxuikKjW81p+mP66raXyp1jrJLUKaqIyRk99WV5wF8kP8Cg4iJjp4SjkA== From: Miquel Raynal To: "Michael Walle" Cc: "Pratyush Yadav" , "Takahiro Kuwano" , "Richard Weinberger" , "Vignesh Raghavendra" , "Thomas Petazzoni" , "Steam Lin" , , Subject: Re: [PATCH 02/30] mtd: spi-nor: winbond: Normalize names In-Reply-To: (Michael Walle's message of "Wed, 22 Jul 2026 15:07:46 +0200") 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> User-Agent: mu4e 1.12.7; emacs 30.2 Date: Wed, 22 Jul 2026 17:19:50 +0200 Message-ID: <87a4rjhx0p.fsf@bootlin.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain X-Last-TLS-Session-Version: TLSv1.3 On 22/07/2026 at 15:07:46 +02, "Michael Walle" wrote: > 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 :) I get the same results with the two names. I know it is not fully deterministic since I must have a history in searching for SPI NOR datasheets on the internet, but both copy-paste in Google search engine return very similar results. "w25q32jwm" looks like an exact name, whereas with the minus sign it indicates a potential break in the name, no? The problem with the 'x' is that you don't know how many you need.