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 lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (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 B65DAC433EF for ; Mon, 14 Mar 2022 23:27:23 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4KHXkf3LQzz3bSw for ; Tue, 15 Mar 2022 10:27:22 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=sysmate.com (client-ip=58.224.160.96; helo=sysmate.com; envelope-from=pooky@sysmate.com; receiver=) Received: from sysmate.com (mail.sysmate.com [58.224.160.96]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4KFKgn22SHz2xTq for ; Fri, 11 Mar 2022 20:02:12 +1100 (AEDT) From: To: "'Patrick Williams'" References: <000001d831cf$88c2f8e0$9a48eaa0$@sysmate.com> In-Reply-To: Subject: RE: [Help] I want to know how to make an image for w25q256JV flash memory. Date: Fri, 11 Mar 2022 18:02:06 +0900 Organization: SYSMATE Message-ID: <000301d83526$af25a960$0d70fc20$@sysmate.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Mailer: Microsoft Outlook 16.0 Thread-Index: AQIP7IYXwugatMURS1KXfJvNuykWNAHy5RCJrDrdFWA= Content-Language: ko X-Mailman-Approved-At: Tue, 15 Mar 2022 10:24:35 +1100 X-BeenThere: openbmc@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Development list for OpenBMC List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: pooky@sysmate.com Cc: openbmc@lists.ozlabs.org Errors-To: openbmc-bounces+openbmc=archiver.kernel.org@lists.ozlabs.org Sender: "openbmc" Dear Patrick, I created an image based on on5263m5 Please let me know where I need to edit to log in automatically. Yours sincerely, Houn-Joung Rim -----Original Message----- From: Patrick Williams Sent: Wednesday, March 9, 2022 2:34 AM To: pooky@sysmate.com Cc: openbmc@lists.ozlabs.org Subject: Re: [Help] I want to know how to make an image for w25q256JV flash memory. On Mon, Mar 07, 2022 at 12:00:42PM +0900, pooky@sysmate.com wrote: > I am developing a motherboard using AST2500 chip using openbmc. > It is booting with w25q256JV flash memory attached to the AST2500 chip. > I want to know how to make an image for w25q256JV flash memory. That chip is relatively small for our codebase (32MB). We still have some machines running that size but we typically have to reduce the features in order to make it fit. Building an image doesn't really concern itself with the particular model of chip but the size. The more important thing for your system is all the configuration information you need to provide about your motherboard so that the software knows how to operate the hardware. In our repository you'll see a lot of 'meta-*' subdirectories. Most of these are the Yocto layers for machines designed by various companies. These are the configuration data on those machines. You may want to take one that looks similar in design and start with that. Specifically on your question regarding this chip, the only thing we really need configured is the FLASH_SIZE variable. This will build the 32MB image that can fit into your chip. Nothing else should care about the specific model because u-boot and Linux should use the JEDEC model information to determine the size of that chip when they access it. Here are a number of machines configured with a 32MB flash layout: ``` $ git grep 'FLASH_SIZE = "32768"' meta-amd/meta-ethanolx/conf/machine/ethanolx.conf:FLASH_SIZE = "32768" meta-asrock/meta-e3c246d4i/conf/machine/e3c246d4i.conf:FLASH_SIZE = "32768" meta-facebook/meta-tiogapass/conf/machine/tiogapass.conf:FLASH_SIZE = "32768" meta-facebook/meta-yosemitev2/conf/machine/yosemitev2.conf:FLASH_SIZE = "32768" meta-ibm/meta-palmetto/conf/machine/palmetto.conf:FLASH_SIZE = "32768" meta-inspur/meta-on5263m5/conf/machine/on5263m5.conf:FLASH_SIZE = "32768" meta-intel-openbmc/meta-s2600wf/conf/machine/s2600wf.conf:FLASH_SIZE = "32768" meta-nuvoton/conf/machine/evb-npcm750.conf:FLASH_SIZE = "32768" meta-quanta/meta-gsj/conf/machine/gsj.conf:FLASH_SIZE = "32768" meta-quanta/meta-olympus-nuvoton/conf/machine/olympus-nuvoton.conf:FLASH_SIZ E = "32768" meta-quanta/meta-q71l/conf/machine/quanta-q71l.conf:FLASH_SIZE = "32768" meta-supermicro/meta-x11spi/conf/machine/x11spi.conf:FLASH_SIZE = "32768" meta-tyan/meta-s7106/conf/machine/s7106.conf:FLASH_SIZE = "32768" meta-tyan/meta-s8036/conf/machine/s8036.conf:FLASH_SIZE = "32768" ``` -- Patrick Williams