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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 B40AAC61DF4 for ; Sat, 25 Nov 2023 01:25:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Cc:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=OpqR89t5U5uELMT6VXijN+6UUGPbq38tHVUT8eiBmiQ=; b=nHN2M1+tH7Naba d6fnXsJpV3EIJaeiCxTvAg4mIpG4yew/OBdz8/aYAEXKx1f67rVNzQznP8dRsyyGWnYsB3arVIJ/B jZ7DaeBhDkw07BxknDpbVGlg5ZF8+ueEJpiaVVhOZ7SsbKDOtBlMfxapLzS9mnyPpyZbY6ezs5GJW ORhW8mgFSWmCI65Xtboflaln2jWmK+WzV4mBz1LdpgCfadJnC5WiJV7ewSNpe5l2afWaqGmxYTqmX TUJqV07xNpBQ9UswcLzvu+Vd3V4x0FvBig5keYzVOi0oNuKbLsTy5ALzj0lq59kZFYIVXCq3LoBhV OtNPv0tFobPoWGHWMIjA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1r6hQ0-008LAX-3D; Sat, 25 Nov 2023 01:25:12 +0000 Received: from relay.smtp-ext.broadcom.com ([192.19.144.205]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1r6hPy-008L9Z-0s for linux-mtd@lists.infradead.org; Sat, 25 Nov 2023 01:25:11 +0000 Received: from bld-lvn-bcawlan-34.lvn.broadcom.net (bld-lvn-bcawlan-34.lvn.broadcom.net [10.75.138.137]) by relay.smtp-ext.broadcom.com (Postfix) with ESMTP id D881EC0000E3; Fri, 24 Nov 2023 17:25:06 -0800 (PST) DKIM-Filter: OpenDKIM Filter v2.11.0 relay.smtp-ext.broadcom.com D881EC0000E3 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=broadcom.com; s=dkimrelay; t=1700875506; bh=t0jIslGuygI39duh2X6/Zyxs22iol4D9s5tcwU8c4G8=; h=From:To:Subject:Date:In-Reply-To:References:From; b=kqxgm/DOE5n4ZIsOdwq6yBevk9A8gfsyTHsAKV+lva+I6dXQgomAhvNFYNwLXfsPX N2Eq/hsGWcWippIUsARapcI2QN1Kj2Wrt53Jz7n7S4A1Uhqn4+L98qPAAJK5NJD8AD UiniffjoUR2x8aNHlFssFyHCPgkGrOFJ5990pJFw= Received: from bcacpedev-irv-3.lvn.broadcom.net (bcacpedev-irv-3.lvn.broadcom.net [10.75.138.105]) by bld-lvn-bcawlan-34.lvn.broadcom.net (Postfix) with ESMTPSA id 90E6118728D; Fri, 24 Nov 2023 17:25:06 -0800 (PST) From: dregan@broadcom.com To: dregan@broadcom.com, miquel.raynal@bootlin.com, bcm-kernel-feedback-list@broadcom.com, linux-mtd@lists.infradead.org, f.fainelli@gmail.com, rafal@milecki.pl, joel.peshkin@broadcom.com, computersforpeace@gmail.com, dan.beygelman@broadcom.com, william.zhang@broadcom.com, frieder.schrempf@kontron.de, linux-kernel@vger.kernel.org, vigneshr@ti.com, richard@nod.at, bbrezillon@kernel.org, kdasu.kdev@gmail.com, JaimeLiao , Adam Borowski Subject: [PATCH v5 2/4] mtd: rawnand: NAND controller write protect Date: Fri, 24 Nov 2023 17:24:36 -0800 Message-Id: <20231125012438.15191-2-dregan@broadcom.com> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20231125012438.15191-1-dregan@broadcom.com> References: <20231125012438.15191-1-dregan@broadcom.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231124_172510_376204_24E091A6 X-CRM114-Status: GOOD ( 11.62 ) X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org From: David Regan Allow NAND controller to be responsible for write protect pin handling during fast path and exec_op destructive operation when controller_wp flag is set. Signed-off-by: David Regan --- Changes in v5: none Changes in v4: none Changes in v3: update comments Changes in v2: none --- drivers/mtd/nand/raw/nand_base.c | 4 ++++ include/linux/mtd/rawnand.h | 2 ++ 2 files changed, 6 insertions(+) diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c index 47cc2c35153b..38ed0ced5b8e 100644 --- a/drivers/mtd/nand/raw/nand_base.c +++ b/drivers/mtd/nand/raw/nand_base.c @@ -367,6 +367,10 @@ static int nand_check_wp(struct nand_chip *chip) if (chip->options & NAND_BROKEN_XD) return 0; + /* controller responsible for NAND write protect */ + if (chip->controller->controller_wp) + return 0; + /* Check the WP bit */ ret = nand_status_op(chip, &status); if (ret) diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h index 31aceda8616c..fcad94aa0515 100644 --- a/include/linux/mtd/rawnand.h +++ b/include/linux/mtd/rawnand.h @@ -1111,6 +1111,7 @@ struct nand_controller_ops { * the bus without restarting an entire read operation nor * changing the column. * @supported_op.cont_read: The controller supports sequential cache reads. + * @controller_wp: the controller is in charge of handling the WP pin. */ struct nand_controller { struct mutex lock; @@ -1119,6 +1120,7 @@ struct nand_controller { unsigned int data_only_read: 1; unsigned int cont_read: 1; } supported_op; + bool controller_wp; }; static inline void nand_controller_init(struct nand_controller *nfc) -- 2.37.3 ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/