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GET /api/patches/278/?format=api
{ "id": 278, "url": "http://patchwork.ozlabs.org/api/patches/278/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-mtd/patch/ea2442770809150537p538f5298s9b5b003a1825b09f@mail.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": "<ea2442770809150537p538f5298s9b5b003a1825b09f@mail.gmail.com>", "list_archive_url": null, "date": "2008-09-15T12:37:29", "name": "nand_base.c: reset chip first", "commit_ref": null, "pull_url": null, "state": "accepted", "archived": false, "hash": "f929e025d8dccd6def300dc906b2d972fc87ddf1", "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/ea2442770809150537p538f5298s9b5b003a1825b09f@mail.gmail.com/mbox/", "series": [], "comments": "http://patchwork.ozlabs.org/api/patches/278/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/278/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 DF2E6DE66D\n\tfor <patchwork@ozlabs.org>; Mon, 15 Sep 2008 22:37:57 +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 1KfDKh-0003wc-Ug; Mon, 15 Sep 2008 12:37:35 +0000", "from mail-gx0-f12.google.com ([209.85.217.12])\n\tby bombadil.infradead.org with esmtp (Exim 4.68 #1 (Red Hat Linux))\n\tid 1KfDKc-0003vD-EV\n\tfor linux-mtd@lists.infradead.org; Mon, 15 Sep 2008 12:37:30 +0000", "by gxk5 with SMTP id 5so23457891gxk.18\n\tfor <linux-mtd@lists.infradead.org>;\n\tMon, 15 Sep 2008 05:37:29 -0700 (PDT)", "by 10.100.120.15 with SMTP id s15mr8260536anc.128.1221482249120;\n\tMon, 15 Sep 2008 05:37:29 -0700 (PDT)", "by 10.100.142.14 with HTTP; Mon, 15 Sep 2008 05:37:29 -0700 (PDT)" ], "Message-ID": "<ea2442770809150537p538f5298s9b5b003a1825b09f@mail.gmail.com>", "Date": "Mon, 15 Sep 2008 14:37:29 +0200", "From": "\"Karl Beldan\" <karl.beldan@gmail.com>", "To": "linux-mtd@lists.infradead.org", "Subject": "[PATCH] [MTD] [NAND] nand_base.c: reset chip first", "MIME-Version": "1.0", "Content-Disposition": "inline", "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\n*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", "prefixes": [] }