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    Subject[PATCH v5 0/5] spi: spi-mem: Add driver for NXP FlexSPI controller
    Date
    - 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[3], [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
    [3] https://patchwork.ozlabs.org/project/linux-mtd/list/?series=70384

    Yogesh 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 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 +
    arch/arm64/boot/dts/freescale/fsl-lx2160a-rdb.dts | 22 +
    arch/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 | 1145 ++++++++++++++++++++
    8 files changed, 1238 insertions(+)
    create mode 100644 Documentation/devicetree/bindings/spi/spi-nxp-fspi.txt
    create mode 100644 drivers/spi/spi-nxp-fspi.c

    --
    2.7.4

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