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=-9.7 required=3.0 tests=DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED,DKIM_VALID,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,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 46469C5DF63 for ; Wed, 6 Nov 2019 14:09:23 +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 132C020663 for ; Wed, 6 Nov 2019 14:09:23 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="D3B7e7L3"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="M4LY1AVp" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 132C020663 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.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:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=TiQG6NuWqBKe+HrQTpJ84+maceYNbuhylgmael+sDx0=; b=D3B7e7L3bHYLI3 E/FX8xALarGMuVEQTu5ZybXPr9VD0s0QhynnD6X6Dl1tlM+kWTwkyf2XiSFNINYyz6lX1bMcvsKo5 JdXLvVrHxcKTY+xubHINyMrk21Zbv6samoXkAU5HYbtEQ3QOJ/ayxHqIJvjDzZqFzURLBQ5e8rmpv LWu/tyiXfkoepzQJ+DHigIB1Xtg2IXsWSiz1hAbceOqOxSwnGb9ZHfGmEb8QcLXCkDqbi7pCHO/uV 6ZCy8dMfzbSrNMuFI8QviyP6grC5TR2tAGT1PMQmo5z9XXclal7e6ha2Psot6xdKr8tH92UW+I7q3 mp1d7SIR24un+pxA04ww==; 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 1iSLzb-0005F0-Vw; Wed, 06 Nov 2019 14:09:04 +0000 Received: from mail-pg1-x541.google.com ([2607:f8b0:4864:20::541]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1iSLzL-0004us-Cb; Wed, 06 Nov 2019 14:08:48 +0000 Received: by mail-pg1-x541.google.com with SMTP id e4so17240714pgs.1; Wed, 06 Nov 2019 06:08:47 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=IGrpDRKjGtiRT6QlcUQ2diK8Wp4T7B3HNEKu57gaI70=; b=M4LY1AVpLRKaQ2PYpl4ihvdNmjYEbPsEsgJGBp5awZvOHExCB4h9/vK/P1ajy7wo4R eCznYQKQmR0sxuEQhx2oXaGnZRS0+eVNZY2kX4ZjBV+ps4U7af3uQx7sDze9vlQLznir 0+HGyIcrR0PoJ69qYWqFpl7aLdHYCXI3x25DrYnY6IKnvJ8a3f1uICEEInJ1jqriXyOi AAPSaDfApqTsa50NTGrK4sl1f6wa1GLuun1S1qnjDGiOinOxUozoZUHhc192xjATsI1Z nG4xZajoba2Bx/4KevwV9PXpoOylk3TpskZAbiV/uma4ZsBPl4rEF50ZQ44nc2Od9vxI bmOw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=IGrpDRKjGtiRT6QlcUQ2diK8Wp4T7B3HNEKu57gaI70=; b=V0VERCNapzQ0qpnmMuddk6KboxCOHc0YFnyO1RRdHLibgJ9z88VU9o/YgpbKiKJqN6 SjLzIN73CN5zeSJ8T2zdRHr/vEl2fl8bDAEtHuE5A+Mb5w0JpVfU8HvyxWVSmkicQmdz /VDEhg1xyyB/GBpC8U/NSYnmVpodCOQCCUlVyYij3WXNks6FM1+UWezUtT9s6bwHsAHI S2cDzx/d7SwYHTfY/ZJPKJcE4eIP8qj6EIWcHLx3WDmBVUUIsFNSNlrC+Xr+NHDTW/a/ cxHqucz3NWKlIJ9jd+J1r/yLZmc5ZnVzegXQMCfITXbXR6/GXi4EYstjC4oWwHDlMknU XfQQ== X-Gm-Message-State: APjAAAWa4kBoUEYKqfbnwCaR9ZSSCFOxVRIeeNhDXh51lZ53V1eotSAB mWAIxHBCfp8KwSlql1i8lUrZ9rwcndk= X-Google-Smtp-Source: APXvYqyciAa1ghxUmSQPYlowrrMDo0Qpjz7jY0Ac/lNoa/xPayE7Fj+LDRfNpWCrFpdZ8Nu12OBZsg== X-Received: by 2002:a65:5885:: with SMTP id d5mr3017512pgu.278.1573049326032; Wed, 06 Nov 2019 06:08:46 -0800 (PST) Received: from localhost.localdomain ([2001:19f0:7001:2668:5400:1ff:fe62:2bbd]) by smtp.gmail.com with ESMTPSA id a16sm4707345pfc.56.2019.11.06.06.08.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 06 Nov 2019 06:08:43 -0800 (PST) From: Chuanhong Guo To: linux-mtd@lists.infradead.org Subject: [PATCH 1/2] mtd: mtk-quadspi: add support for memory-mapped flash reading Date: Wed, 6 Nov 2019 22:07:47 +0800 Message-Id: <20191106140748.13100-2-gch981213@gmail.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20191106140748.13100-1-gch981213@gmail.com> References: <20191106140748.13100-1-gch981213@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191106_060847_457626_D8A38094 X-CRM114-Status: GOOD ( 14.57 ) 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: Mark Rutland , devicetree@vger.kernel.org, Vignesh Raghavendra , Tudor Ambarus , Richard Weinberger , linux-kernel@vger.kernel.org, Chuanhong Guo , Rob Herring , linux-mediatek@lists.infradead.org, Miquel Raynal , Matthias Brugger , Brian Norris , David Woodhouse , linux-arm-kernel@lists.infradead.org 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 PIO reading mode on this controller is ridiculously inefficient (one cmd+addr+dummy sequence reads only one byte) This patch adds support for reading from memory-mapped flash area which increases reading speed from 1MB/s to 5.6MB/s Signed-off-by: Chuanhong Guo --- drivers/mtd/spi-nor/mtk-quadspi.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/mtd/spi-nor/mtk-quadspi.c b/drivers/mtd/spi-nor/mtk-quadspi.c index 34db01ab6cab..ba8b3be39896 100644 --- a/drivers/mtd/spi-nor/mtk-quadspi.c +++ b/drivers/mtd/spi-nor/mtk-quadspi.c @@ -106,6 +106,7 @@ struct mtk_nor { struct spi_nor nor; struct device *dev; void __iomem *base; /* nor flash base address */ + void __iomem *flash_base; struct clk *spi_clk; struct clk *nor_clk; }; @@ -272,6 +273,11 @@ static ssize_t mtk_nor_read(struct spi_nor *nor, loff_t from, size_t length, mtk_nor_set_read_mode(mtk_nor); mtk_nor_set_addr(mtk_nor, addr); + if (mtk_nor->flash_base) { + memcpy_fromio(buffer, mtk_nor->flash_base + from, length); + return length; + } + for (i = 0; i < length; i++) { ret = mtk_nor_execute_cmd(mtk_nor, MTK_NOR_PIO_READ_CMD); if (ret < 0) @@ -475,6 +481,11 @@ static int mtk_nor_drv_probe(struct platform_device *pdev) if (IS_ERR(mtk_nor->base)) return PTR_ERR(mtk_nor->base); + res = platform_get_resource(pdev, IORESOURCE_MEM, 1); + mtk_nor->flash_base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(mtk_nor->flash_base)) + mtk_nor->flash_base = NULL; + mtk_nor->spi_clk = devm_clk_get(&pdev->dev, "spi"); if (IS_ERR(mtk_nor->spi_clk)) return PTR_ERR(mtk_nor->spi_clk); -- 2.21.0 ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/