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=-2.2 required=3.0 tests=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 D5909C83009 for ; Wed, 29 Apr 2020 14:22:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B3CFD206F0 for ; Wed, 29 Apr 2020 14:22:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727972AbgD2OW4 (ORCPT ); Wed, 29 Apr 2020 10:22:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60280 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1726811AbgD2OWz (ORCPT ); Wed, 29 Apr 2020 10:22:55 -0400 Received: from bhuna.collabora.co.uk (bhuna.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e3e3]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 99AD0C03C1AD; Wed, 29 Apr 2020 07:22:55 -0700 (PDT) Received: from localhost (unknown [IPv6:2a01:e0a:2c:6930:5cf4:84a1:2763:fe0d]) (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 D92BE2A2054; Wed, 29 Apr 2020 15:22:53 +0100 (BST) Date: Wed, 29 Apr 2020 16:22:49 +0200 From: Boris Brezillon To: "Ramuthevar, Vadivel MuruganX" Cc: linux-kernel@vger.kernel.org, linux-mtd@lists.infradead.org, devicetree@vger.kernel.org, cheol.yong.kim@intel.com, hauke.mehrtens@intel.com, qi-ming.wu@intel.com, anders.roxell@linaro.org, vigneshr@ti.com, arnd@arndb.de, richard@nod.at, brendanhiggins@google.com, linux-mips@vger.kernel.org, robh+dt@kernel.org, miquel.raynal@bootlin.com, tglx@linutronix.de, masonccyang@mxic.com.tw, andriy.shevchenko@intel.com Subject: Re: [PATCH v4 2/2] mtd: rawnand: Add NAND controller support on Intel LGM SoC Message-ID: <20200429162249.55d38ee8@collabora.com> In-Reply-To: <20200429104205.18780-3-vadivel.muruganx.ramuthevar@linux.intel.com> References: <20200429104205.18780-1-vadivel.muruganx.ramuthevar@linux.intel.com> <20200429104205.18780-3-vadivel.muruganx.ramuthevar@linux.intel.com> Organization: Collabora X-Mailer: Claws Mail 3.17.5 (GTK+ 2.24.32; x86_64-redhat-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 29 Apr 2020 18:42:05 +0800 "Ramuthevar, Vadivel MuruganX" wrote: > + > +#define EBU_ADDR_SEL(n) (0x20 + (n) * 4) > +#define EBU_ADDR_MASK (5 << 4) It's still unclear what ADDR_MASK is for. Can you add a comment explaining what it does? > +#define EBU_ADDR_SEL_REGEN 0x1 > + > + writel(lower_32_bits(ebu_host->cs[ebu_host->cs_num].nand_pa) | > + EBU_ADDR_SEL_REGEN | EBU_ADDR_MASK, > + ebu_host->ebu + EBU_ADDR_SEL(reg)); > + > + writel(EBU_MEM_BASE_CS_0 | EBU_ADDR_MASK | EBU_ADDR_SEL_REGEN, > + ebu_host->ebu + EBU_ADDR_SEL(0)); > + writel(EBU_MEM_BASE_CS_1 | EBU_ADDR_MASK | EBU_ADDR_SEL_REGEN, > + ebu_host->ebu + EBU_ADDR_SEL(reg)); That's super weird. You seem to set EBU_ADDR_SEL(reg) twice. Are you sure that's needed, and are we setting EBU_ADDR_SEL(0) here? 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=-2.3 required=3.0 tests=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 12190C83004 for ; Wed, 29 Apr 2020 14:23:15 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 7BD09206F0 for ; Wed, 29 Apr 2020 14:23:14 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="U+7uf/FB" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7BD09206F0 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=bombadil.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=onzeJQueh42W77M5OoIzUrz92vAD9TVfcynDbLN2Ajo=; b=U+7uf/FBvongLP AoYsbO0yZdEL1YbCFvMM72AvGT6xpP7bEIJLPUexPey/CoKVbef239FR751t7eitWfaLG2e5VUsBh D3HFbjDclRLlan7hHuCEiw+GSd6VBCwT5nvVWPI0IYBuJEsEMuePOxRhj0EWwTTOky4wvq2aUKn4A r36tI76dKEilWFTe92AyN7HbvImikeeIN74BRzwMt9ARxSvPdJSHZS/XI96l//WgsQHNpXJBSlrAf dQI1Lb8WE2IJxDgGtOmr9v96yIEnVEmrDXJ6ThdCAVeIJnTwmJ7JpKvIJ+xVpYI/XLgLzzsXb3Vhy E96WSSn8+jP8fyqIE8dA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jTnc4-0005s9-Jb; Wed, 29 Apr 2020 14:23:00 +0000 Received: from bhuna.collabora.co.uk ([2a00:1098:0:82:1000:25:2eeb:e3e3]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jTnc1-0005qB-Sx for linux-mtd@lists.infradead.org; Wed, 29 Apr 2020 14:22:59 +0000 Received: from localhost (unknown [IPv6:2a01:e0a:2c:6930:5cf4:84a1:2763:fe0d]) (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 D92BE2A2054; Wed, 29 Apr 2020 15:22:53 +0100 (BST) Date: Wed, 29 Apr 2020 16:22:49 +0200 From: Boris Brezillon To: "Ramuthevar, Vadivel MuruganX" Subject: Re: [PATCH v4 2/2] mtd: rawnand: Add NAND controller support on Intel LGM SoC Message-ID: <20200429162249.55d38ee8@collabora.com> In-Reply-To: <20200429104205.18780-3-vadivel.muruganx.ramuthevar@linux.intel.com> References: <20200429104205.18780-1-vadivel.muruganx.ramuthevar@linux.intel.com> <20200429104205.18780-3-vadivel.muruganx.ramuthevar@linux.intel.com> Organization: Collabora X-Mailer: Claws Mail 3.17.5 (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-20200429_072258_063493_590F1ED2 X-CRM114-Status: UNSURE ( 8.30 ) X-CRM114-Notice: Please train this message. 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: cheol.yong.kim@intel.com, devicetree@vger.kernel.org, masonccyang@mxic.com.tw, anders.roxell@linaro.org, vigneshr@ti.com, arnd@arndb.de, hauke.mehrtens@intel.com, richard@nod.at, brendanhiggins@google.com, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, robh+dt@kernel.org, linux-mtd@lists.infradead.org, miquel.raynal@bootlin.com, tglx@linutronix.de, qi-ming.wu@intel.com, andriy.shevchenko@intel.com 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, 29 Apr 2020 18:42:05 +0800 "Ramuthevar, Vadivel MuruganX" wrote: > + > +#define EBU_ADDR_SEL(n) (0x20 + (n) * 4) > +#define EBU_ADDR_MASK (5 << 4) It's still unclear what ADDR_MASK is for. Can you add a comment explaining what it does? > +#define EBU_ADDR_SEL_REGEN 0x1 > + > + writel(lower_32_bits(ebu_host->cs[ebu_host->cs_num].nand_pa) | > + EBU_ADDR_SEL_REGEN | EBU_ADDR_MASK, > + ebu_host->ebu + EBU_ADDR_SEL(reg)); > + > + writel(EBU_MEM_BASE_CS_0 | EBU_ADDR_MASK | EBU_ADDR_SEL_REGEN, > + ebu_host->ebu + EBU_ADDR_SEL(0)); > + writel(EBU_MEM_BASE_CS_1 | EBU_ADDR_MASK | EBU_ADDR_SEL_REGEN, > + ebu_host->ebu + EBU_ADDR_SEL(reg)); That's super weird. You seem to set EBU_ADDR_SEL(reg) twice. Are you sure that's needed, and are we setting EBU_ADDR_SEL(0) here? ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/