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=-11.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 19215C433DF for ; Mon, 15 Jun 2020 08:59:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id ED9AC2065F for ; Mon, 15 Jun 2020 08:59:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729201AbgFOI7u (ORCPT ); Mon, 15 Jun 2020 04:59:50 -0400 Received: from relay7-d.mail.gandi.net ([217.70.183.200]:60859 "EHLO relay7-d.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728875AbgFOI7u (ORCPT ); Mon, 15 Jun 2020 04:59:50 -0400 X-Originating-IP: 91.224.148.103 Received: from localhost.localdomain (unknown [91.224.148.103]) (Authenticated sender: miquel.raynal@bootlin.com) by relay7-d.mail.gandi.net (Postfix) with ESMTPSA id 1B37720008; Mon, 15 Jun 2020 08:59:47 +0000 (UTC) From: Miquel Raynal To: Sivaprakash Murugesan , miquel.raynal@bootlin.com, richard@nod.at, vigneshr@ti.com, peter.ujfalusi@ti.com, boris.brezillon@collabora.com, linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH V4 2/2] mtd: rawnand: qcom: set BAM mode only if not set already Date: Mon, 15 Jun 2020 10:59:46 +0200 Message-Id: <20200615085946.22390-1-miquel.raynal@bootlin.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <1591948696-16015-3-git-send-email-sivaprak@codeaurora.org> References: MIME-Version: 1.0 X-linux-mtd-patch-notification: thanks X-linux-mtd-patch-commit: 7c9765940d6f1835a39bba2e77d80d26d64f5dd2 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2020-06-12 at 07:58:16 UTC, Sivaprakash Murugesan wrote: > BAM is DMA controller on QCOM ipq platforms, BAM mode on NAND driver > is set by writing BAM_MODE_EN bit on NAND_CTRL register. > > NAND_CTRL is an operational register and in BAM mode operational > registers are read only. > > So, before enabling BAM mode by writing the NAND_CTRL register, check > if BAM mode was already enabled by the bootloader, and enable BAM mode > only if it is not enabled already. > > Signed-off-by: Sivaprakash Murugesan Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next, thanks. Miquel