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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8C11FC61D97 for ; Sat, 25 Nov 2023 01:25:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231608AbjKYBZE (ORCPT ); Fri, 24 Nov 2023 20:25:04 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46822 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229665AbjKYBZB (ORCPT ); Fri, 24 Nov 2023 20:25:01 -0500 Received: from relay.smtp-ext.broadcom.com (saphodev.broadcom.com [192.19.144.205]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1FA4219A8 for ; Fri, 24 Nov 2023 17:25:08 -0800 (PST) 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 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.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