Hello, This patchset adds a new driver for the 7 series FPGA's SelectMAP interface. The SelectMAP interface shares a common GPIO protocol with the SPI interface which is already in the kernel (drivers/fpga/xilinx-spi.c). The approach proposed in this patchset is to refactor xilinx-spi.c into xilinx-core.c which would handle the common GPIO protocol. This is then used to build two drivers, the already existing xilinx-spi.c driver and a newly added xilinx-selectmap.c driver. The SelectMAP driver proposed only supports 8 bit mode. This is because the 16 and 32 bits mode have limitations with regards to compressed bitstream support as well as introducing endianness considerations. I'm testing xilinx-selectmap.c on a custom i.MX6 board connected to an Artix 7 FPGA. Flashing a 913K bitstream takes 0.44 seconds. v2: From Krzysztof Kozlowski review's: * Use more conventional names for gpio DT bindings * fix example in DT bindings * add mc-peripheral-props.yaml to DT bindings * fix various formatting mistakes * Remove all occurences of the "slave" word. Charles Perry (3): fpga: xilinx-spi: extract a common driver core dt-bindings: fpga: xlnx,fpga-slave-selectmap: add DT schema fpga: xilinx-selectmap: add new driver .../bindings/fpga/xlnx,fpga-selectmap.yaml | 83 +++++++ drivers/fpga/Kconfig | 12 + drivers/fpga/Makefile | 2 + drivers/fpga/xilinx-core.c | 215 ++++++++++++++++++ drivers/fpga/xilinx-core.h | 28 +++ drivers/fpga/xilinx-selectmap.c | 106 +++++++++ drivers/fpga/xilinx-spi.c | 205 ++--------------- 7 files changed, 462 insertions(+), 189 deletions(-) create mode 100644 Documentation/devicetree/bindings/fpga/xlnx,fpga-selectmap.yaml create mode 100644 drivers/fpga/xilinx-core.c create mode 100644 drivers/fpga/xilinx-core.h create mode 100644 drivers/fpga/xilinx-selectmap.c -- 2.43.0
