From patchwork Fri Sep 4 08:30:00 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Raghavendra, Vignesh" X-Patchwork-Id: 514347 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2001:1868:205::9]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 79AE314032F for ; Fri, 4 Sep 2015 18:33:13 +1000 (AEST) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZXmOo-00088Q-SB; Fri, 04 Sep 2015 08:31:06 +0000 Received: from devils.ext.ti.com ([198.47.26.153]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZXmOb-0007ny-0d; Fri, 04 Sep 2015 08:30:53 +0000 Received: from dflxv15.itg.ti.com ([128.247.5.124]) by devils.ext.ti.com (8.13.7/8.13.7) with ESMTP id t848UOUq023632; Fri, 4 Sep 2015 03:30:24 -0500 Received: from DFLE72.ent.ti.com (dfle72.ent.ti.com [128.247.5.109]) by dflxv15.itg.ti.com (8.14.3/8.13.8) with ESMTP id t848UNNF029981; Fri, 4 Sep 2015 03:30:23 -0500 Received: from dlep32.itg.ti.com (157.170.170.100) by DFLE72.ent.ti.com (128.247.5.109) with Microsoft SMTP Server id 14.3.224.2; Fri, 4 Sep 2015 03:30:22 -0500 Received: from uda0132425.apr.dhcp.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep32.itg.ti.com (8.14.3/8.13.8) with ESMTP id t848U6x0021698; Fri, 4 Sep 2015 03:30:19 -0500 From: Vignesh R To: Benoit Cousson , Tony Lindgren , Russell King , David Woodhouse , Brian Norris , Mark Brown , Subject: [PATCH 3/5] mtd: devices: m25p80: add support for mmap read request Date: Fri, 4 Sep 2015 14:00:00 +0530 Message-ID: <1441355402-6837-4-git-send-email-vigneshr@ti.com> X-Mailer: git-send-email 2.5.1 In-Reply-To: <1441355402-6837-1-git-send-email-vigneshr@ti.com> References: <1441355402-6837-1-git-send-email-vigneshr@ti.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150904_013053_181403_EEBE60A8 X-CRM114-Status: UNSURE ( 8.46 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -6.9 (------) X-Spam-Report: SpamAssassin version 3.4.0 on bombadil.infradead.org summary: Content analysis details: (-6.9 points) pts rule name description ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at http://www.dnswl.org/, high trust [198.47.26.153 listed in list.dnswl.org] -0.0 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -0.0 SPF_PASS SPF: sender matches SPF record -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Vignesh R , linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org, linux-mtd@lists.infradead.org, linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org Sender: "linux-mtd" Errors-To: linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org Certain spi controllers may support memory mapped interface to read from m25p80 type flash devices. This interface provides better read performance than regular SPI interface. Call spi_mtd_mmap_read() function, if available, to make use of memory-mapped interface. Signed-off-by: Vignesh R --- drivers/mtd/devices/m25p80.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c index d313f948b96c..b8b391aab331 100644 --- a/drivers/mtd/devices/m25p80.c +++ b/drivers/mtd/devices/m25p80.c @@ -133,6 +133,14 @@ static int m25p80_read(struct spi_nor *nor, loff_t from, size_t len, /* convert the dummy cycles to the number of bytes */ dummy /= 8; + if (spi->master->spi_mtd_mmap_read) { + return spi->master->spi_mtd_mmap_read(spi, from, len, + retlen, buf, + nor->read_opcode, + nor->addr_width, + dummy); + } + spi_message_init(&m); memset(t, 0, (sizeof t));