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=-1.0 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS autolearn=ham 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 AA2E7C43219 for ; Fri, 3 May 2019 11:27:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 792D220652 for ; Fri, 3 May 2019 11:27:44 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="HtW8rkXO" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727447AbfECL1n (ORCPT ); Fri, 3 May 2019 07:27:43 -0400 Received: from mail-wm1-f66.google.com ([209.85.128.66]:34834 "EHLO mail-wm1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726372AbfECL1n (ORCPT ); Fri, 3 May 2019 07:27:43 -0400 Received: by mail-wm1-f66.google.com with SMTP id y197so6319987wmd.0 for ; Fri, 03 May 2019 04:27:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:cc:references:from:openpgp:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=qT8fctyh/NTtgLpBOVz/YqcyXidYhaHzijOB2ar/c2Y=; b=HtW8rkXO6GVnxXCxg9W+TehfpHqgFJ4BDrZWs1UpshGfMMBH1Hp7Sb2G5AupRSuOtO 9gsCEo/dUNF5WwRryKFg5rQifBtBv8IMx6mg5yfbXdETsXOzH6UGEFgfs8oGxnAM2f0d dJliHrIRRP5r1jrPfvgeKQKmlBRA0NXNqmZi1Gkp0aqeZsufMMHbLobNLpsAewm1vaSg TEqQPmEydFQ4oU9Nhaf5qq1Jjg/fVH3VIAZJ83mlx0Od4+kWZsdnbKgnINlL/C5TUhBB coNkicnUrD9SRF1F+vLTVGdoGkPTJl7VR+0PKuGYG8v3SwFNnnMbf3qugIhae8yLffil czbQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:openpgp:message-id :date:user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=qT8fctyh/NTtgLpBOVz/YqcyXidYhaHzijOB2ar/c2Y=; b=L13kzh0RUSvquO+mg5HW53WbtnOkH4OUIDhvRi7U/RwsYc7GyXeT4yLGLyLNjBbLbq iS8lWU6dGMA8viR8YoK0wyJwq8qbNvtKgD8LObP/Mn6fQ9spP/+xh+qvjiz9McxQTIBl 2c0IZLTkpFZlSEXOf+7wGidZLoOUSiMHr7uR794YrkexKC8dpAaPbZ+pCqaFkUk0YRR1 9vfINhIcjcJBeY7WR+sjLQ2z/nz1bwUNIJEa5hxxhvECAIUDhMYfYz435ztEfQ7pfptr eD4uAhwk2OJEhKAgGi4n3fTFHIIbg4DnzT4cxwMBcWd8F1jJmeOBbkAf2I0Ceh4CW9ek 21vA== X-Gm-Message-State: APjAAAWtFibts6EVZphCdrkIdpuY6AiQlhx+XmvgUOHWihBiUq7RGmgC 9E/Bi2EuRFHavtvvBukRV6Q= X-Google-Smtp-Source: APXvYqw62T5hIXnX6MLwYBTQsAQFn3c0zBFxcl9l5uMqqjVkvyOiVR7Ixq62QGnGKXTaeDyvYXHmaA== X-Received: by 2002:a05:600c:28c:: with SMTP id 12mr5640674wmk.65.1556882861274; Fri, 03 May 2019 04:27:41 -0700 (PDT) Received: from [192.168.1.4] (ip-86-49-110-70.net.upcbroadband.cz. [86.49.110.70]) by smtp.gmail.com with ESMTPSA id r9sm1931240wrv.82.2019.05.03.04.27.40 (version=TLS1_3 cipher=AEAD-AES128-GCM-SHA256 bits=128/128); Fri, 03 May 2019 04:27:40 -0700 (PDT) Subject: Re: [PATCH] mtd: spi-nor: enable 4B opcodes for n25q256a To: Simon Goldschmidt Cc: linux-mtd@lists.infradead.org, linux-kernel , Brian Norris , Richard Weinberger , David Woodhouse , Boris Brezillon , Tudor Ambarus References: <20190503085327.5180-1-simon.k.r.goldschmidt@gmail.com> <8161008c-fafd-a89f-d2d8-413224844cd2@gmail.com> From: Marek Vasut Openpgp: preference=signencrypt Message-ID: <4ff197be-6ede-6644-d135-b13aab590bb6@gmail.com> Date: Fri, 3 May 2019 13:27:39 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 5/3/19 12:37 PM, Simon Goldschmidt wrote: > On Fri, May 3, 2019 at 12:00 PM Marek Vasut wrote: >> >> On 5/3/19 10:53 AM, Simon Goldschmidt wrote: >>> Tested on socfpga cyclone5 where this is required to ensure that the >>> boot rom can access this flash after warm reboot. >> >> Are you sure _all_ variants of the N25Q256 support 4NB opcodes ? >> I think there were some which didn't, but I might be wrong. > > Oh, damn, you're right. The documentation [1] statest that 4-byte erase and > program opcodes are only supported for part numbers N25Q256A83ESF40x, > N25Q256A83E1240x and N25QA83ESFA0F. ;-) > Any idea of how I can still enable 4-byte opcodes for my chip? Maybe SFDP tables contains some information whether the chip supports the 4B opcodes ? -- Best regards, Marek Vasut