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=-17.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,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 7790BC433ED for ; Wed, 5 May 2021 22:02:56 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (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 ECE5A613D8 for ; Wed, 5 May 2021 22:02:55 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org ECE5A613D8 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=bootlin.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=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-Id:Date: Subject:Cc:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=wLm+I2urYH+e46CO0YjZ9/KJxo5ZZSQkFaJSpNvf50I=; b=BAiRSpigOB9Hz7lklpwzme81U FYu+5waOvtwyfmPIHADjzUdyiCUde4YKZMB7YLeX7STT0zJGxR2Gyye+ZCtVcHWD8oYJ5NP3lz2yE oqwPhXLkeShrPdaj9v2UIo8cK+PUML/BLSyKDkpOUU/5IzvCylZbSJar4yyG3YuO/p7c4YpRBnPKH 83UjPniZXdZtZOgzrHIL16ZhXG3CNgOA8RiMdCEf7Do8+SVPAwPFfZiqBEpDzR0N4jSahnQ4jZ/fd +I4+EO6YdZIlZbL5o9hbGSA7uLX1uEFBHQDnegWs5EhJqPP82ISTv8VWM0UzaXYz50anamNUtxmgs 2LBxkFzjQ==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lePak-002SCD-7R; Wed, 05 May 2021 22:02:02 +0000 Received: from bombadil.infradead.org ([2607:7c80:54:e::133]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lePDf-002OoQ-VN for linux-mtd@desiato.infradead.org; Wed, 05 May 2021 21:38:12 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: Content-Type:MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc: To:From:Sender:Reply-To:Content-ID:Content-Description; bh=YjeVqkH5v+f7PsLchxQ97m44jFa3mhhrrNQiWkzbX3o=; b=YRIAV7qjU8BgEtSXXoDzFAOyOH oAaI0Nz4XXJheeQHfE+ICAD5j5dzLB68m+IORTcWjaQmJNrFS/yLNbWBBEsS6qKbeM6+QwkD2JkoZ Zs1nEv8XndUR+DF+dmGTkz1e0sYOtmlTndbSmaLpWcKi4Vo35olXdI87N15yC8wYhkHj7S9KcCH+4 7ExI8/1rtVlJv35MV3oFTb2RzlahZkon/qVd9xYOhM5ii/GSzeU6Dh7XQza4ckDHQxpeVMyqA4I5I lwZVhn4GjDZpxdlPOfFCNnfMdfcgZqzpkggf4XFZRMpI3OIEs/hFQvwSVtN5zID3mcZgVnss4gZVk /fqmtmgA==; Received: from relay8-d.mail.gandi.net ([217.70.183.201]) by bombadil.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lePDd-005IgW-5Y for linux-mtd@lists.infradead.org; Wed, 05 May 2021 21:38:10 +0000 X-Originating-IP: 90.89.138.59 Received: from xps13.stephanxp.local (lfbn-tou-1-1325-59.w90-89.abo.wanadoo.fr [90.89.138.59]) (Authenticated sender: miquel.raynal@bootlin.com) by relay8-d.mail.gandi.net (Postfix) with ESMTPSA id E288F1BF20E; Wed, 5 May 2021 21:38:06 +0000 (UTC) From: Miquel Raynal To: Richard Weinberger , Vignesh Raghavendra , Tudor Ambarus , Cc: Thomas Petazzoni , Michal Simek , Naga Sureshkumar Relli , Amit Kumar Mahapatra , Miquel Raynal Subject: [PATCH 15/22] mtd: rawnand: Add a helper to find the closest ONFI NV-DDR mode Date: Wed, 5 May 2021 23:37:43 +0200 Message-Id: <20210505213750.257417-16-miquel.raynal@bootlin.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20210505213750.257417-1-miquel.raynal@bootlin.com> References: <20210505213750.257417-1-miquel.raynal@bootlin.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210505_143809_506120_C02D81B0 X-CRM114-Status: GOOD ( 12.43 ) X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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 Introduce a similar helper to onfi_find_closest_sdr_mode(), but for NV-DDR timings. It just takes a timing structure as parameter and returns the closest mode by comparing all minimum timings. This is useful for rigid controllers on which tuning the timings is not possible. Signed-off-by: Miquel Raynal --- drivers/mtd/nand/raw/internals.h | 2 ++ drivers/mtd/nand/raw/nand_timings.c | 42 +++++++++++++++++++++++++++++ 2 files changed, 44 insertions(+) diff --git a/drivers/mtd/nand/raw/internals.h b/drivers/mtd/nand/raw/internals.h index 012876e14317..c06bc2f1aaa2 100644 --- a/drivers/mtd/nand/raw/internals.h +++ b/drivers/mtd/nand/raw/internals.h @@ -90,6 +90,8 @@ void onfi_fill_interface_config(struct nand_chip *chip, unsigned int timing_mode); unsigned int onfi_find_closest_sdr_mode(const struct nand_sdr_timings *spec_timings); +unsigned int +onfi_find_closest_nvddr_mode(const struct nand_nvddr_timings *spec_timings); int nand_choose_best_sdr_timings(struct nand_chip *chip, struct nand_interface_config *iface, struct nand_sdr_timings *spec_timings); diff --git a/drivers/mtd/nand/raw/nand_timings.c b/drivers/mtd/nand/raw/nand_timings.c index 8eaa132c3900..7b41afc372d2 100644 --- a/drivers/mtd/nand/raw/nand_timings.c +++ b/drivers/mtd/nand/raw/nand_timings.c @@ -601,6 +601,48 @@ onfi_find_closest_sdr_mode(const struct nand_sdr_timings *spec_timings) } /** + * onfi_find_closest_nvddr_mode - Derive the closest ONFI NVDDR timing mode + * given a set of timings + * @spec_timings: the timings to challenge + */ +unsigned int +onfi_find_closest_nvddr_mode(const struct nand_nvddr_timings *spec_timings) +{ + const struct nand_nvddr_timings *onfi_timings; + int mode; + + for (mode = ARRAY_SIZE(onfi_nvddr_timings) - 1; mode > 0; mode--) { + onfi_timings = &onfi_nvddr_timings[mode].timings.nvddr; + + if (spec_timings->tCCS_min <= onfi_timings->tCCS_min && + spec_timings->tAC_min <= onfi_timings->tAC_min && + spec_timings->tADL_min <= onfi_timings->tADL_min && + spec_timings->tCAD_min <= onfi_timings->tCAD_min && + spec_timings->tCAH_min <= onfi_timings->tCAH_min && + spec_timings->tCALH_min <= onfi_timings->tCALH_min && + spec_timings->tCALS_min <= onfi_timings->tCALS_min && + spec_timings->tCAS_min <= onfi_timings->tCAS_min && + spec_timings->tCEH_min <= onfi_timings->tCEH_min && + spec_timings->tCH_min <= onfi_timings->tCH_min && + spec_timings->tCK_min <= onfi_timings->tCK_min && + spec_timings->tCS_min <= onfi_timings->tCS_min && + spec_timings->tDH_min <= onfi_timings->tDH_min && + spec_timings->tDQSCK_min <= onfi_timings->tDQSCK_min && + spec_timings->tDQSD_min <= onfi_timings->tDQSD_min && + spec_timings->tDS_min <= onfi_timings->tDS_min && + spec_timings->tDSC_min <= onfi_timings->tDSC_min && + spec_timings->tRHW_min <= onfi_timings->tRHW_min && + spec_timings->tRR_min <= onfi_timings->tRR_min && + spec_timings->tWHR_min <= onfi_timings->tWHR_min && + spec_timings->tWRCK_min <= onfi_timings->tWRCK_min && + spec_timings->tWW_min <= onfi_timings->tWW_min) + return mode; + } + + return 0; +} + +/* * onfi_fill_sdr_interface_config - Initialize a SDR interface config from a * given ONFI mode * @chip: The NAND chip -- 2.27.0 ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/