From: Vignesh R <vigneshr@ti.com>
To: Tony Lindgren <tony@atomide.com>,
Brian Norris <computersforpeace@gmail.com>,
Mark Brown <broonie@kernel.org>
Cc: Rob Herring <robh+dt@kernel.org>,
Russell King <linux@arm.linux.org.uk>, <hramrach@gmail.com>,
<devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<linux-omap@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-mtd@lists.infradead.org>, <linux-spi@vger.kernel.org>,
Vignesh R <vigneshr@ti.com>
Subject: [PATCH v5 0/5] Add memory mapped read support for ti-qspi
Date: Fri, 11 Dec 2015 09:39:55 +0530 [thread overview]
Message-ID: <1449807000-6457-1-git-send-email-vigneshr@ti.com> (raw)
Changes since v4:
Use syscon to access system control module register in ti-qspi driver.
Changes since v3:
Rework to introduce spi_flash_read_message struct.
Support different opcode/addr/data formats as per Brian's suggestion
here: https://lkml.org/lkml/2015/11/11/454
Changes since v2:
Remove mmap_lock_mutex.
Optimize enable/disable of mmap mode.
Changes since v1:
Introduce API in SPI core that MTD flash driver can call for mmap read
instead of directly calling spi-master driver callback. This API makes
sure that SPI core msg queue is locked during mmap transfers.
v1: https://lkml.org/lkml/2015/9/4/103
Cover letter:
This patch series adds support for memory mapped read port of ti-qspi.
ti-qspi has a special memory mapped port through which SPI flash
memories can be accessed directly via SoC specific memory region.
First patch adds a method to pass flash specific information like read
opcode, dummy bytes etc and to request mmap read. Second patch
implements mmap read method in ti-qspi driver. Patch 3 adapts m25p80 to
use mmap read method before trying normal SPI transfer. Patch 4 and 5
add memory map region DT entries for DRA7xx and AM43xx SoCs.
This patch series is based on the discussions here:
http://www.spinics.net/lists/linux-spi/msg04796.html
Tested on DRA74 EVM and AM437x-SK.
Read performance increases from ~100kB/s to ~2.5MB/s.
Vignesh R (5):
spi: introduce accelerated read support for spi flash devices
spi: spi-ti-qspi: add mmap mode read support
mtd: devices: m25p80: add support for mmap read request
ARM: dts: DRA7: add entry for qspi mmap region
ARM: dts: AM4372: add entry for qspi mmap region
Documentation/devicetree/bindings/spi/ti_qspi.txt | 22 +++-
arch/arm/boot/dts/am4372.dtsi | 4 +-
arch/arm/boot/dts/dra7.dtsi | 6 +-
drivers/mtd/devices/m25p80.c | 20 ++++
drivers/spi/spi-ti-qspi.c | 139 +++++++++++++++++-----
drivers/spi/spi.c | 45 +++++++
include/linux/spi/spi.h | 41 +++++++
7 files changed, 243 insertions(+), 34 deletions(-)
--
2.6.3
next reply other threads:[~2015-12-11 4:10 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-11 4:09 Vignesh R [this message]
2015-12-11 4:09 ` [PATCH v5 1/5] spi: introduce accelerated read support for spi flash devices Vignesh R
2015-12-11 4:09 ` [PATCH v5 2/5] spi: spi-ti-qspi: add mmap mode read support Vignesh R
2015-12-11 4:09 ` [PATCH v5 3/5] mtd: devices: m25p80: add support for mmap read request Vignesh R
2016-02-09 19:36 ` Mark Brown
2016-02-11 5:33 ` Vignesh R
2016-02-12 22:37 ` Mark Brown
2016-02-16 8:00 ` Vignesh R
2016-02-16 12:38 ` Mark Brown
2016-02-17 16:11 ` R, Vignesh
2016-02-24 12:21 ` Vignesh R
2015-12-11 4:09 ` [PATCH v5 4/5] ARM: dts: DRA7: add entry for qspi mmap region Vignesh R
2015-12-11 15:09 ` Rob Herring
2015-12-17 18:45 ` Tony Lindgren
2015-12-18 5:50 ` Vignesh R
2015-12-18 16:42 ` Tony Lindgren
2015-12-11 4:10 ` [PATCH v5 5/5] ARM: dts: AM4372: " Vignesh R
2015-12-21 12:03 ` [PATCH v5 0/5] Add memory mapped read support for ti-qspi Vignesh R
2016-01-05 5:20 ` Vignesh R
2016-01-05 18:19 ` Mark Brown
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