- 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] Support for octal flash commands and other Octal data transfer related framework changes work is in progress. [1] https://www.nxp.com/docs/en/reference-manual/IMXRT1050RM.pdf [2] https://patchwork.kernel.org/project/linux-arm-kernel/list/?series=9721 [3] https://patchwork.ozlabs.org/project/linux-mtd/list/?series=63445 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 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 | 42 + MAINTAINERS | 6 + arch/arm64/boot/dts/freescale/fsl-lx2160a-rdb.dts | 22 + arch/arm64/boot/dts/freescale/fsl-lx2160a.dtsi | 12 + arch/arm64/configs/defconfig | 1 + drivers/spi/Kconfig | 10 + drivers/spi/Makefile | 1 + drivers/spi/spi-nxp-fspi.c | 1231 ++++++++++++++++++++ 8 files changed, 1324 insertions(+) create mode 100644 Documentation/devicetree/bindings/spi/spi-nxp-fspi.txt create mode 100644 drivers/spi/spi-nxp-fspi.c -- 2.7.4
