Hi Yogesh, On Fri, 31 Aug 2018 15:59:57 +0530 Yogesh Gaur <yogeshnarayan.gaur@xxxxxxx> wrote: > - Add a 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. > > FlexSPI controller is similar to the existing Freescale/NXP QuadSPI > controller with advanced features. > > - 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] > > Patch 1 adds variable size in spi_device struct, to save the > size of connected slave device. > Patch 2 adds flags for octal I/O data transfer. > Support for octal flash commands and other framework changes would going to be done in different > patch set. > Patch 3 adds a driver for the NXP FlexSPI controller, driver is based on > new spi-mem framework. Can we please omit octa mode support for now and focus on single/dual/quad SPI support? That is, drop patch 2, and do not set the OCTAL flags in patch 3. Regards, Boris > Patch 4 add binding file for this driver. > Patch 5 add device node property for FlexSPI driver for lx2160 SoC. > Patch 6 enables the config option. > Patch 7 add MAINTAINERS file. > > [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 > > This series adds below patches: > Yogesh Gaur (7): > spi: add slave device size in spi_device struct > spi: add flags for octal I/O data transfer > spi: spi-mem: Add a driver for NXP FlexSPI controller > dt-bindings: spi: add binding file for NXP FlexSPI driver > arm64: dts: lx2160a: add fspi node property > arm64: defconfig: enable NXP FlexSPI driver > MAINTAINERS: add maintainers for the NXP FlexSPI driver > > .../devicetree/bindings/spi/spi-nxp-fspi.txt | 42 + > MAINTAINERS | 6 + > arch/arm64/boot/dts/freescale/fsl-lx2160a-rdb.dts | 21 + > arch/arm64/boot/dts/freescale/fsl-lx2160a.dtsi | 12 + > arch/arm64/configs/defconfig | 1 + > drivers/mtd/devices/m25p80.c | 6 + > drivers/mtd/spi-nor/spi-nor.c | 2 + > drivers/spi/Kconfig | 10 + > drivers/spi/Makefile | 1 + > drivers/spi/spi-nxp-fspi.c | 1242 ++++++++++++++++++++ > include/linux/spi/spi.h | 4 + > 11 files changed, 1347 insertions(+) > create mode 100644 Documentation/devicetree/bindings/spi/spi-nxp-fspi.txt > create mode 100644 drivers/spi/spi-nxp-fspi.c >
