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 6F10AC433FE for ; Mon, 20 Dec 2021 15:48:41 +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-Type: Content-Transfer-Encoding:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:Message-ID:References:In-Reply-To:Subject:Cc:To:From :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=E5baM64okieeyH067vS8qRPvzO/nbm4EBxBsc54OX+o=; b=0hPN9Yof65fO1nVA9rCmNdo75m lSX0Ct/RVQ4jYgLc163uyFucDBcGJoyCf9qxu1JI1Zm/QPsEd5nSqd06c74ds6Jld2NTRJRIQQ7eH egLd5HkXsr08JtmK979tOfpf9FnCBd3kkppR1mo6SEOtlRaY00RDPK5qBzETExavaVdaVkSdJxh+j P6xSKqzabLgjA1UWW974wt9TRl9KTqeuL2ppPJcewHEqKt/oaRFTZE1Aw/YlZKaVA/16MAWwqi7IE ZBag3TcZcjTYmmW1ydlCdhoOgqoY7mUFvRysZ5mFKgxAFdXsCa7EaihmncZJ2GPHALVOJlc7gJIs8 1Mya6zLQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mzKtE-0039zv-Dk; Mon, 20 Dec 2021 15:47:52 +0000 Received: from ssl.serverraum.org ([176.9.125.105]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mzKtB-0039ys-5R for linux-mtd@lists.infradead.org; Mon, 20 Dec 2021 15:47:50 +0000 Received: from ssl.serverraum.org (web.serverraum.org [172.16.0.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ssl.serverraum.org (Postfix) with ESMTPSA id 6F4E5223ED; Mon, 20 Dec 2021 16:47:45 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=walle.cc; s=mail2016061301; t=1640015267; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=8/3Ez7mRfxbwsP6b4TIPeFtFpVI24qbdeAeJgmIgils=; b=oquRCuHl4wJfYFLqxMXoMRuJM79wwCuVzpxgAvwFiVJntyj/alqM9t+tlOv8GF1eB2mnAM 4vCpA/UjcitQ+ib9GvB/xK55gSHTo2AxZhNR5lYAus82Y440jtRMQvrMIkyPod4eRZRs5C bKOfYxALWPZET2WYvZ/bAsGrGaAoXbk= MIME-Version: 1.0 Date: Mon, 20 Dec 2021 16:47:45 +0100 From: Michael Walle To: Takahiro Kuwano Cc: Tudor.Ambarus@microchip.com, Takahiro.Kuwano@infineon.com, juliensu@mxic.com.tw, jaimeliao@mxic.com.tw, Bacem.Daassi@infineon.com, beanhuo@micron.com, shiva.linuxworks@gmail.com, sshivamurthy@micron.com, p.yadav@ti.com, linux-mtd@lists.infradead.org Subject: Re: How does an SPI NOR handle a single byte write in Octal DTR mode? In-Reply-To: References: User-Agent: Roundcube Webmail/1.4.11 Message-ID: X-Sender: michael@walle.cc X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211220_074749_396713_24B50E71 X-CRM114-Status: UNSURE ( 7.98 ) X-CRM114-Notice: Please train this message. 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-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org Hi, Am 2021-12-20 11:32, schrieb Takahiro Kuwano: > In case of Infineon(Cypress) S28 devices, it can be done by > de-asserting > chip select before clock falling (not sure typical controllers support > this). > That means the device can take odd address in 8D-8D-8D mode. Ahh nice. FWIW, I had a quick look at the FlexSPI controller found on the NXP LS1028A, it doesn't seem to support deasserting the CS after half a clock cycle, though. -michael ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/