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GET /api/patches/279/?format=api
{ "id": 279, "url": "http://patchwork.ozlabs.org/api/patches/279/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-mtd/patch/48CE6C43.8050500@gmail.com/", "project": { "id": 3, "url": "http://patchwork.ozlabs.org/api/projects/3/?format=api", "name": "Linux MTD development", "link_name": "linux-mtd", "list_id": "linux-mtd.lists.infradead.org", "list_email": "linux-mtd@lists.infradead.org", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<48CE6C43.8050500@gmail.com>", "list_archive_url": null, "date": "2008-09-15T14:08:03", "name": "[PATCH] [MTD] [NAND] nand_base.c: reset chip first", "commit_ref": "ef89a8801321e0d0665c327c9d77d602ef764c87", "pull_url": null, "state": "accepted", "archived": false, "hash": "284c1480d2ae96d7d8ad688070a89e6c4dd67c83", "submitter": { "id": 144, "url": "http://patchwork.ozlabs.org/api/people/144/?format=api", "name": "Karl Beldan", "email": "karl.beldan@gmail.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-mtd/patch/48CE6C43.8050500@gmail.com/mbox/", "series": [], "comments": "http://patchwork.ozlabs.org/api/patches/279/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/279/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<linux-mtd-bounces+patchwork=ozlabs.org@lists.infradead.org>", "X-Original-To": "patchwork@ozlabs.org", "Delivered-To": "patchwork@ozlabs.org", "Received": [ "from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34])\n\t(using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits))\n\t(Client did not present a certificate)\n\tby ozlabs.org (Postfix) with ESMTPS id 35952DE356\n\tfor <patchwork@ozlabs.org>; Tue, 16 Sep 2008 00:08:33 +1000 (EST)", "from localhost ([127.0.0.1] helo=bombadil.infradead.org)\n\tby bombadil.infradead.org with esmtp (Exim 4.68 #1 (Red Hat Linux))\n\tid 1KfEkR-0002mi-2m; Mon, 15 Sep 2008 14:08:15 +0000", "from rn-out-0910.google.com ([64.233.170.190])\n\tby bombadil.infradead.org with esmtp (Exim 4.68 #1 (Red Hat Linux))\n\tid 1KfEkO-0002ee-Tk\n\tfor linux-mtd@lists.infradead.org; Mon, 15 Sep 2008 14:08:13 +0000", "by rn-out-0910.google.com with SMTP id m7so1453040rnd.3\n\tfor <linux-mtd@lists.infradead.org>;\n\tMon, 15 Sep 2008 07:08:12 -0700 (PDT)", "by 10.86.68.1 with SMTP id q1mr6022966fga.2.1221487691676;\n\tMon, 15 Sep 2008 07:08:11 -0700 (PDT)", "from ?192.168.2.205? ( [82.225.11.200])\n\tby mx.google.com with ESMTPS id 3sm15019978fge.3.2008.09.15.07.08.03\n\t(version=TLSv1/SSLv3 cipher=RC4-MD5);\n\tMon, 15 Sep 2008 07:08:04 -0700 (PDT)" ], "Message-ID": "<48CE6C43.8050500@gmail.com>", "Date": "Mon, 15 Sep 2008 16:08:03 +0200", "From": "Karl Beldan <karl.beldan@gmail.com>", "User-Agent": "Thunderbird 2.0.0.9 (X11/20071031)", "MIME-Version": "1.0", "To": "linux-mtd@lists.infradead.org", "Subject": "Re: [PATCH] [MTD] [NAND] nand_base.c: reset chip first", "References": "<ea2442770809150537p538f5298s9b5b003a1825b09f@mail.gmail.com>", "In-Reply-To": "<ea2442770809150537p538f5298s9b5b003a1825b09f@mail.gmail.com>", "X-Spam-Score": "0.0 (/)", "Cc": "David.Woodhouse@intel.com", "X-BeenThere": "linux-mtd@lists.infradead.org", "X-Mailman-Version": "2.1.9", "Precedence": "list", "List-Id": "Linux MTD discussion mailing list <linux-mtd.lists.infradead.org>", "List-Unsubscribe": "<http://lists.infradead.org/mailman/listinfo/linux-mtd>,\n\t<mailto:linux-mtd-request@lists.infradead.org?subject=unsubscribe>", "List-Archive": "<http://lists.infradead.org/pipermail/linux-mtd>", "List-Post": "<mailto:linux-mtd@lists.infradead.org>", "List-Help": "<mailto:linux-mtd-request@lists.infradead.org?subject=help>", "List-Subscribe": "<http://lists.infradead.org/mailman/listinfo/linux-mtd>,\n\t<mailto:linux-mtd-request@lists.infradead.org?subject=subscribe>", "Content-Type": "text/plain; charset=\"us-ascii\"", "Content-Transfer-Encoding": "7bit", "Sender": "linux-mtd-bounces@lists.infradead.org", "Errors-To": "linux-mtd-bounces+patchwork=ozlabs.org@lists.infradead.org" }, "content": "Some chips require a RESET after power-up (e.g. Micron MT29FxGxxxxx).\nThe first command sent is NAND_CMD_READID.\nIssue a NAND_CMD_RESET in nand_scan_ident before reading the device id.\nTested with an MT29F4G08AAC.\n\nSigned-off-by: Karl Beldan <karl.beldan@gmail.com>", "diff": "diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c\nindex d1129ba..2cfac9b 100644\n--- a/drivers/mtd/nand/nand_base.c\n+++ b/drivers/mtd/nand/nand_base.c\n@@ -2318,6 +2318,12 @@ static struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd,\n \t/* Select the device */\n \tchip->select_chip(mtd, 0);\n \n+\t/*\n+\t * Reset the chip, required by some chips (e.g. Micron MT29FxGxxxxx)\n+\t * after power-up\n+\t */\n+\tchip->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);\n+\n \t/* Send the command for reading device ID */\n \tchip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1);\n \n@@ -2488,6 +2494,8 @@ int nand_scan_ident(struct mtd_info *mtd, int maxchips)\n \t/* Check for a chip array */\n \tfor (i = 1; i < maxchips; i++) {\n \t\tchip->select_chip(mtd, i);\n+\t\t/* See comment in nand_get_flash_type for reset */\n+\t\tchip->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);\n \t\t/* Send the command for reading device ID */\n \t\tchip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1);\n \t\t/* Read manufacturer and device IDs */\n", "prefixes": [ "MTD", "NAND" ] }