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: Vignesh Raghavendra X-Patchwork-Id: 7120771 Return-Path: X-Original-To: patchwork-linux-spi@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 5D0FFBEEC1 for ; Fri, 4 Sep 2015 08:32:51 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 8E96620859 for ; Fri, 4 Sep 2015 08:32:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5432D2073D for ; Fri, 4 Sep 2015 08:32:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932752AbbIDIbv (ORCPT ); Fri, 4 Sep 2015 04:31:51 -0400 Received: from devils.ext.ti.com ([198.47.26.153]:60017 "EHLO devils.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932539AbbIDIay (ORCPT ); Fri, 4 Sep 2015 04:30:54 -0400 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 , CC: , , , , , , Vignesh R 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 Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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));