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 X-Spam-Level: X-Spam-Status: No, score=-5.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_2 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D04C4C433E0 for ; Wed, 3 Feb 2021 11:25:25 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 2252264F61 for ; Wed, 3 Feb 2021 11:25:25 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2252264F61 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=collabora.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-ID: Subject:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=65nwekRsJpZk0cEtqZOnXVTcbHDenLmUmD4bE7Zuw1k=; b=cXC+gA3/ey7hWVVH2ZKV/qY+6 zjXmx8PUXIslkkHc8XmzVGTa+6ugh7qtOt3BbmoscvIxDgyW8FD0yrp6W9KqDTTHBoHB0hHfWgAz6 vDL6ukRhtwcbTAsl3yej3mx6Yy+crNQ4aL4UrXeq5kXstAfnYFsBo0GVa8m7WNK18r/H9C0AUU7Us bULvuXR4bnLxWRt6tspAHhh1pefy9+o4CEn4JVhnNLJaypuVR/5ZXQOPjzVjv6552v6BDVQZfwrk4 7YsN0cq6Ae/+xL3LWuZx6+PjlDonH0eQQDrZLkaDKtclqipWs537nDuEAhqmrtmiqTV0L9nzE+R6/ ZvSUqFiNQ==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l7GGy-0001kf-3U; Wed, 03 Feb 2021 11:24:36 +0000 Received: from bhuna.collabora.co.uk ([46.235.227.227]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1l7GGv-0001k1-DG for linux-mtd@lists.infradead.org; Wed, 03 Feb 2021 11:24:34 +0000 Received: from localhost (unknown [IPv6:2a01:e0a:2c:6930:b93f:9fae:b276:a89a]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: bbrezillon) by bhuna.collabora.co.uk (Postfix) with ESMTPSA id C06581F451BB; Wed, 3 Feb 2021 11:24:28 +0000 (GMT) Date: Wed, 3 Feb 2021 12:24:22 +0100 From: Boris Brezillon To: Manivannan Sadhasivam , richard@nod.at Subject: Re: [PATCH] mtd: rawnand: Do not check for bad block if bbt is unavailable Message-ID: <20210203122422.6963b0ed@collabora.com> In-Reply-To: <8A2468D5-B435-4923-BA4F-7BF7CC0FF207@linaro.org> References: <20210130035412.6456-1-manivannan.sadhasivam@linaro.org> <20210201151824.5a9dca4a@xps13> <20210202041614.GA840@work> <20210202091459.0c41a769@xps13> <20210203110522.12f2b326@xps13> <20210203111914.1c2f68f6@collabora.com> <8A2468D5-B435-4923-BA4F-7BF7CC0FF207@linaro.org> Organization: Collabora X-Mailer: Claws Mail 3.17.8 (GTK+ 2.24.32; x86_64-redhat-linux-gnu) MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210203_062433_589318_67F59158 X-CRM114-Status: GOOD ( 16.91 ) 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: vigneshr@ti.com, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, bjorn.andersson@linaro.org, linux-mtd@lists.infradead.org, Miquel Raynal 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 On Wed, 03 Feb 2021 16:22:42 +0530 Manivannan Sadhasivam wrote: > On 3 February 2021 3:49:14 PM IST, Boris Brezillon wrote: > >On Wed, 03 Feb 2021 15:42:02 +0530 > >Manivannan Sadhasivam wrote: > > > >> >> > >> >> I got more information from the vendor, Telit. The access to the > >3rd > >> >partition is protected by Trustzone and any access in non privileged > >> >mode (where Linux kernel runs) causes kernel panic and the device > >> >reboots. > > > >Out of curiosity, is it a per-CS-line thing or is this section > >protected on all CS? > > > > Sorry, I didn't get your question. The qcom controller can handle several chips, each connected through a different CS (chip-select) line, right? I'm wondering if the firmware running in secure mode has the ability to block access for a specific CS line or if all CS lines have the same constraint. That will impact the way you describe it in your DT (in one case the secure-region property should be under the controller node, in the other case it should be under the NAND chip node). ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/