From mboxrd@z Thu Jan 1 00:00:00 1970 From: Naga Sureshkumar Relli Subject: [LINUX RFC v4 0/4] Add stripe support for ZynqMP SoC GQSPI controller Date: Sun, 27 Nov 2016 14:03:18 +0530 Message-ID: <1480235598-33827-1-git-send-email-nagasure@xilinx.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-spi@vger.kernel.org To: , , , , Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org List-Id: linux-spi.vger.kernel.org This patch series is continuation to previous patches mentioned in below link http://marc.info/?l=linux-spi&m=145009963109143&w=2 i am re-initiating this series, Could you please help us to get this done? what is dual parallel mode? --------------------------- ZynqMP GQSPI controller supports Dual Parallel mode with following functionalities: 1) Supporting two SPI flash memories operating in parallel. 8 I/O lines. 2) Chip selects, data lines and clock are differ to both the flash devices 3) This mode is targeted for faster read/write speed and also doubles the size 4) Commands/data can be transmitted/received from both the devices(mirror), or only upper or only lower flash memory devices. 5) Data arrangement: With stripe enabled, Even bytes i.e. 0, 2, 4,... are transmitted on Lower Data Bus Odd bytes i.e. 1, 3, 5,.. are transmitted on Upper Data Bus. i have tested this on top of latest git-hub master. kindly suggest us the way, so that we can proceed further to add this support. Naga Sureshkumar Relli (4): spi: adding support for data stripe feature in core mtd: add spi_device instance to spi_nor struct mtd: spi-nor: add stripe support spi: zynqmp: gqspi: add support for stripe feature drivers/mtd/devices/m25p80.c | 1 + drivers/mtd/spi-nor/spi-nor.c | 130 ++++++++++++++++++++++++++++++++--------- drivers/spi/spi-zynqmp-gqspi.c | 26 ++++++++- drivers/spi/spi.c | 8 +++ include/linux/mtd/spi-nor.h | 3 + include/linux/spi/spi.h | 11 ++++ 6 files changed, 149 insertions(+), 30 deletions(-) -- 2.10.2