linux-kernel - Re: [PATCH v6 0/5] spi: spi-mem: Add driver for NXP FlexSPI controller

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Date:   Wed, 9 Jan 2019 14:19:08 +0000
From:   Schrempf Frieder <frieder.schrempf@...tron.de>
To:     Yogesh Narayan Gaur <yogeshnarayan.gaur@....com>,
        "linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>,
        "boris.brezillon@...tlin.com" <boris.brezillon@...tlin.com>,
        "marek.vasut@...il.com" <marek.vasut@...il.com>,
        "broonie@...nel.org" <broonie@...nel.org>,
        "linux-spi@...r.kernel.org" <linux-spi@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
CC:     "robh@...nel.org" <robh@...nel.org>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "computersforpeace@...il.com" <computersforpeace@...il.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v6 0/5] spi: spi-mem: Add driver for NXP FlexSPI
 controller

On 08.01.19 10:24, Yogesh Narayan Gaur wrote:
> - Add driver for NXP FlexSPI host controller
> 
>   FlexSPI is a flexsible SPI host controller [1], Chapter 30 page 1475,
>   which supports two SPI channels and up to 4 external devices.
>   Each channel supports Single/Dual/Quad/Octal mode data transfer (1/2/4/8 bidirectional data lines)
>   i.e. FlexSPI acts as an interface to external devices, maximum 4, each with up to 8
>   bidirectional data lines.
> 
> - Tested this driver with mtd_debug(Erase/Write/Read) utility and JFFS2
>   filesystem mounting and booting on NXP LX2160ARDB[2] and LX2160AQDS targets.
>   LX2160ARDB is having two NOR slave device connected on single bus A
>   i.e. A0 and A1 (CS0 and CS1).
>   LX2160AQDS is having two NOR slave device connected on separate buses
>   one flash on A0 and second on B1 i.e. (CS0 and CS3).
>   Verified this driver on following SPI NOR flashes:
>     Micron, mt35xu512aba, [Read - 1 bit mode]
>     Cypress, s25fl512s, [Read - 1/2/4 bit mode]
> 
> [1] https://www.nxp.com/docs/en/reference-manual/IMXRT1050RM.pdf
> [2] https://patchwork.kernel.org/project/linux-arm-kernel/list/?submitter=182097
> 
> Yogesh Narayan Gaur (5):
>    spi: spi-mem: Add driver for NXP FlexSPI controller
>    dt-bindings: spi: add binding file for NXP FlexSPI controller
>    arm64: dts: lx2160a: add FlexSPI node property
>    arm64: defconfig: enable NXP FlexSPI driver
>    MAINTAINERS: add maintainers for the NXP FlexSPI driver
> 
> Changes for v6:
> - Rebase on top of v5.0-rc1.

Your patches don't apply to v5.0-rc1. It seems like you have instead 
rebased onto the for-5.1 or for-next branch of the SPI tree. I guess 
this is okay, but you should have pointed that out correctly here.

> - Incorporated review comments for
>    patch 'spi: spi-mem: Add driver for NXP FlexSPI controller'.
> - Updated s-b tag in all patches.
> Changes for v5:
> - Rebase on top of v4.20-rc2
> - Incorporated review comments for
>    patch 'spi: spi-mem: Add driver for NXP FlexSPI controller'.
> Changes for v4:
> - Incorporated review comments for
>    patch 'spi: spi-mem: Add driver for NXP FlexSPI controller'.
> - Incorporated binding file review comments.
> Changes for v3:
> - Incorporated review comments for
>    patch 'spi: spi-mem: Add driver for NXP FlexSPI controller'.
> Changes for v2:
> - Incorporated Boris review comments and drop below patches as per the comments.
>   - Patch 'spi: add slave device size in spi_device struct'
>   - Patch 'spi: add flags for octal I/O data transfer'
> - Incorporated DTS and Binding file review comments of Shawn Guo and Rob Herring.
> 
>   .../devicetree/bindings/spi/spi-nxp-fspi.txt  |   39 +
>   MAINTAINERS                                   |    7 +
>   .../boot/dts/freescale/fsl-lx2160a-rdb.dts    |   22 +
>   .../arm64/boot/dts/freescale/fsl-lx2160a.dtsi |   13 +
>   arch/arm64/configs/defconfig                  |    1 +
>   drivers/spi/Kconfig                           |   10 +
>   drivers/spi/Makefile                          |    1 +
>   drivers/spi/spi-nxp-fspi.c                    | 1095 +++++++++++++++++
>   8 files changed, 1188 insertions(+)
>   create mode 100644 Documentation/devicetree/bindings/spi/spi-nxp-fspi.txt
>   create mode 100644 drivers/spi/spi-nxp-fspi.c
>