From nobody Mon Feb 9 05:59:35 2026 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 EDF10EB64D9 for ; Mon, 10 Jul 2023 12:42:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232060AbjGJMmu (ORCPT ); Mon, 10 Jul 2023 08:42:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42128 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232072AbjGJMmr (ORCPT ); Mon, 10 Jul 2023 08:42:47 -0400 Received: from mail-wm1-x32e.google.com (mail-wm1-x32e.google.com [IPv6:2a00:1450:4864:20::32e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 12F00103 for ; Mon, 10 Jul 2023 05:42:44 -0700 (PDT) Received: by mail-wm1-x32e.google.com with SMTP id 5b1f17b1804b1-3fbc244d384so45481375e9.0 for ; Mon, 10 Jul 2023 05:42:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1688992962; x=1691584962; h=content-transfer-encoding:in-reply-to:content-language:references :cc:to:subject:from:user-agent:mime-version:date:message-id:from:to :cc:subject:date:message-id:reply-to; bh=TdvM16o5h23jwD1okqOHQiuKkM8L7IpEOiBotY2IGmY=; b=b376hUBVwU5cG0vV849R90AbgHClWR5m0B0ip65d7lLM9lEjoEwc5JayOE5aBw1QWX b5bc3XGTXrLab8Vol+LypXiM7YozU6vCehy1UgWdXKnRUbzAxcuf3jD3mHKCLihQnTbt 2ECT/v7hdYss29tOsNN/+7uQmX9S/toJpC2ipJ0kEYWK7rOYfnP51klWTWVEWZM3inYG wvCQZoqU3Ac9v7ROA07LO0/1ACRT258GaaUcxrTdGiCAzpPRx8VNORi88g7HuqMlN/CI SbKQahle6Va+QU6n+8MeOKUcO5358RHYMp+fKK3/50Zmoow6bjq6YzhwNI9BeTM73JQp 4ESg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1688992962; x=1691584962; h=content-transfer-encoding:in-reply-to:content-language:references :cc:to:subject:from:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=TdvM16o5h23jwD1okqOHQiuKkM8L7IpEOiBotY2IGmY=; b=X9B4844hF2F4nM3gPmIOiB3HE0xJX3SUEvuF10irkwe0t2VU+Sb2QNQTnwW07C0l0Y r0/NfjBTEnTvn1f8z5golJSoatRxX6ev5X8KDPfYzOi0oCCx8mGU95CA3cRpHPe0sEIT WfLCLNDNkhhWBKnJVEd0rv3W64Z8AdJ0HnGepwacrpStBPIMJGopHWSdUvR9QgjK1LV/ LHk8ZJtbsmGnHWpGMxNPavijp84N91sqPXCVd5kVJrYROuObJkCoOHe8/xsTI8sd8BSt T6XSAvCtnDsWChC+IiiWtqiRRrRQMAu4BpLhX8s3NSrtFKxs66jQaMMwn7pwb06o/cEI h8Qw== X-Gm-Message-State: ABy/qLb67baUs0rucGPT5sIwlA7J0vyfv/tIFFvCoEUWAP8OFv1fa5Cp uzcrKxMuuVNITRQYKaiRtcw= X-Google-Smtp-Source: APBJJlHd019CoyCypGiulVzj6NCOiOfzkSWrETKAuTfVD3XhhcYEgNfYy/2loWPSYkCuLickws37OA== X-Received: by 2002:a1c:ed14:0:b0:3fb:4149:b816 with SMTP id l20-20020a1ced14000000b003fb4149b816mr10732743wmh.8.1688992962064; Mon, 10 Jul 2023 05:42:42 -0700 (PDT) Received: from [192.168.2.1] (81-204-249-205.fixed.kpn.net. [81.204.249.205]) by smtp.gmail.com with ESMTPSA id e32-20020a5d5960000000b0031432f1528csm11637235wri.45.2023.07.10.05.42.41 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 10 Jul 2023 05:42:41 -0700 (PDT) Message-ID: <0d6d0c57-c1e3-6761-9ecd-48176b4b6d4c@gmail.com> Date: Mon, 10 Jul 2023 14:42:40 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.11.0 From: Johan Jonker Subject: [PATCH v4 3/3] mtd: rawnand: rockchip: add skipbbt option To: miquel.raynal@bootlin.com Cc: richard@nod.at, vigneshr@ti.com, heiko@sntech.de, linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, yifeng.zhao@rock-chips.com References: <08f694df-4c1d-f059-43fd-f1aee678062c@gmail.com> Content-Language: en-US In-Reply-To: <08f694df-4c1d-f059-43fd-f1aee678062c@gmail.com> Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" On Rockchip SoCs the first boot stages are written on NAND with help of manufacturer software that uses a different format then the MTD framework. Skip the automatic BBT scan with the NAND_SKIP_BBTSCAN option so that the original content is unchanged during the driver probe. The NAND_NO_BBM_QUIRK option allows us to erase bad blocks with the nand_erase_nand() function and the flash_erase command. With these options the user has the "freedom of choice" by neutral access mode to read and write in whatever format is needed. Signed-off-by: Johan Jonker --- Changed V4: Reduce subject size Changes V3: Change prefixes Changed V2: reword --- I'm aware that the maintainer finds it "awful", but it's absolute necessary to: 1: read/write boot blocks in user space without touching original content 2: format a NAND for MTD either with built in or external driver module So we keep it include in this serie. --- drivers/mtd/nand/raw/rockchip-nand-controller.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/mtd/nand/raw/rockchip-nand-controller.c b/drivers/mtd/= nand/raw/rockchip-nand-controller.c index 5a04680342c3..fcda4c760ffa 100644 --- a/drivers/mtd/nand/raw/rockchip-nand-controller.c +++ b/drivers/mtd/nand/raw/rockchip-nand-controller.c @@ -188,6 +188,10 @@ struct rk_nfc { unsigned long assigned_cs; }; +static int skipbbt; +module_param(skipbbt, int, 0644); +MODULE_PARM_DESC(skipbbt, "Skip BBT scan if data on the NAND chip is not i= n MTD format."); + static inline struct rk_nfc_nand_chip *rk_nfc_to_rknand(struct nand_chip *= chip) { return container_of(chip, struct rk_nfc_nand_chip, chip); @@ -1153,6 +1157,9 @@ static int rk_nfc_nand_chip_init(struct device *dev, = struct rk_nfc *nfc, nand_set_controller_data(chip, nfc); + if (skipbbt) + chip->options |=3D NAND_SKIP_BBTSCAN | NAND_NO_BBM_QUIRK; + chip->options |=3D NAND_USES_DMA | NAND_NO_SUBPAGE_WRITE; chip->bbt_options =3D NAND_BBT_USE_FLASH | NAND_BBT_NO_OOB; -- 2.30.2