From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753270AbbKCKHJ (ORCPT ); Tue, 3 Nov 2015 05:07:09 -0500 Received: from devils.ext.ti.com ([198.47.26.153]:48978 "EHLO devils.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752594AbbKCKHA (ORCPT ); Tue, 3 Nov 2015 05:07:00 -0500 From: Vignesh R To: Mark Brown , Tony Lindgren CC: Michal Suchanek , Russell King , Vignesh R , , , , , , Subject: [PATCH v2 3/5] mtd: devices: m25p80: add support for mmap read request Date: Tue, 3 Nov 2015 15:36:12 +0530 Message-ID: <1446545174-14193-4-git-send-email-vigneshr@ti.com> X-Mailer: git-send-email 2.6.2 In-Reply-To: <1446545174-14193-1-git-send-email-vigneshr@ti.com> References: <1446545174-14193-1-git-send-email-vigneshr@ti.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.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() interface, if supported, to make use of memory-mapped interface. Signed-off-by: Vignesh R --- drivers/mtd/devices/m25p80.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c index 9cd3631170ef..3978bcb513b9 100644 --- a/drivers/mtd/devices/m25p80.c +++ b/drivers/mtd/devices/m25p80.c @@ -133,6 +133,11 @@ 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_mmap_read_supported(spi)) + return 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)); -- 2.6.2