From patchwork Wed Mar 18 07:42:27 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mason Yang X-Patchwork-Id: 1257226 X-Patchwork-Delegate: miquel.raynal@bootlin.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=lists.infradead.org (client-ip=2607:7c80:54:e::133; helo=bombadil.infradead.org; envelope-from=linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=mxic.com.tw Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20170209 header.b=F4xl9ErJ; dkim-atps=neutral Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 48j2996HVsz9sNg for ; Wed, 18 Mar 2020 18:43:57 +1100 (AEDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=bOFY5FQvw5DpR3S40Rjkdr1XPJSqHtInuOgghQwZLKw=; b=F4xl9ErJyvqS4tkJE6/D+ZumC7 KgftVgDFnvUisC1fsZzx0wdK0d8xXV2ACzwejvnXHkpLZoiecnlkZbiS1yXWwgkF1/SxLniCH2KEP DgKndRke2F1A86NuJU/YvzPL84AiJhccCuUBVVmL2DyySTErDwInQMqAmwZ+TPn57yyi5EBd8vu5X OqKAkfchGbGCPJBzzqNJgueObr9sJ0eI8sL+cVlzjAb5Cncwlq0e/vb6TKi6DkxxaQwUwDLJiWsVu NhQzXHiFjBZ+QiTye+facIKkaOzWNKx6hAobdOKPy9lCnFAz4FSvIQxXqc+7deBp8nmw1SHNtDtf3 ysBJjDgg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jETMb-0005kx-Jr; Wed, 18 Mar 2020 07:43:41 +0000 Received: from twhmllg4.macronix.com ([122.147.135.202]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jETMP-0005bq-Ou for linux-mtd@lists.infradead.org; Wed, 18 Mar 2020 07:43:31 +0000 Received: from localhost.localdomain ([172.17.195.96]) by TWHMLLG4.macronix.com with ESMTP id 02I7gTOA041137; Wed, 18 Mar 2020 15:42:30 +0800 (GMT-8) (envelope-from masonccyang@mxic.com.tw) From: Mason Yang To: miquel.raynal@bootlin.com, richard@nod.at, vigneshr@ti.com, bbrezillon@kernel.org Subject: [PATCH v4 1/2] mtd: rawnand: Add support for manufacturer specific suspend/resume operation Date: Wed, 18 Mar 2020 15:42:27 +0800 Message-Id: <1584517348-14486-2-git-send-email-masonccyang@mxic.com.tw> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1584517348-14486-1-git-send-email-masonccyang@mxic.com.tw> References: <1584517348-14486-1-git-send-email-masonccyang@mxic.com.tw> X-MAIL: TWHMLLG4.macronix.com 02I7gTOA041137 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200318_004330_085291_ACE6DFA9 X-CRM114-Status: GOOD ( 13.33 ) X-Spam-Score: 0.0 (/) X-Spam-Report: SpamAssassin version 3.4.3 on bombadil.infradead.org summary: Content analysis details: (0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [122.147.135.202 listed in list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: juliensu@mxic.com.tw, s.hauer@pengutronix.de, yuehaibing@huawei.com, linux-kernel@vger.kernel.org, stefan@agner.ch, linux-mtd@lists.infradead.org, frieder.schrempf@kontron.de, tglx@linutronix.de, Mason Yang , allison@lohutok.net MIME-Version: 1.0 Sender: "linux-mtd" Errors-To: linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org Patch nand_suspend() & nand_resume() to let manufacturers overwrite suspend/resume operations. Signed-off-by: Mason Yang Reviewed-by: Miquel Raynal --- drivers/mtd/nand/raw/nand_base.c | 17 +++++++++++++---- include/linux/mtd/rawnand.h | 4 ++++ 2 files changed, 17 insertions(+), 4 deletions(-) diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c index f64e3b6..bde17a3 100644 --- a/drivers/mtd/nand/raw/nand_base.c +++ b/drivers/mtd/nand/raw/nand_base.c @@ -4321,16 +4321,22 @@ static int nand_block_markbad(struct mtd_info *mtd, loff_t ofs) /** * nand_suspend - [MTD Interface] Suspend the NAND flash * @mtd: MTD device structure + * + * Returns 0 for success or negative error code otherwise. */ static int nand_suspend(struct mtd_info *mtd) { struct nand_chip *chip = mtd_to_nand(mtd); + int ret = 0; mutex_lock(&chip->lock); - chip->suspended = 1; + if (chip->suspend) + ret = chip->suspend(chip); + if (!ret) + chip->suspended = 1; mutex_unlock(&chip->lock); - return 0; + return ret; } /** @@ -4342,11 +4348,14 @@ static void nand_resume(struct mtd_info *mtd) struct nand_chip *chip = mtd_to_nand(mtd); mutex_lock(&chip->lock); - if (chip->suspended) + if (chip->suspended) { + if (chip->resume) + chip->resume(chip); chip->suspended = 0; - else + } else { pr_err("%s called for a chip which is not in suspended state\n", __func__); + } mutex_unlock(&chip->lock); } diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h index 4ab9bcc..b3dccb9 100644 --- a/include/linux/mtd/rawnand.h +++ b/include/linux/mtd/rawnand.h @@ -1064,6 +1064,8 @@ struct nand_legacy { * @lock: lock protecting the suspended field. Also used to * serialize accesses to the NAND device. * @suspended: set to 1 when the device is suspended, 0 when it's not. + * @suspend: [REPLACEABLE] specific NAND device suspend operation + * @resume: [REPLACEABLE] specific NAND device resume operation * @bbt: [INTERN] bad block table pointer * @bbt_td: [REPLACEABLE] bad block table descriptor for flash * lookup. @@ -1117,6 +1119,8 @@ struct nand_chip { struct mutex lock; unsigned int suspended : 1; + int (*suspend)(struct nand_chip *chip); + void (*resume)(struct nand_chip *chip); uint8_t *oob_poi; struct nand_controller *controller;