Kernel-4.18.0-80.el8_lattice-ice40-fpga-mgr

Lattice iCE40 FPGA Manager

Required properties:

• compatible: Should contain “lattice,ice40-fpga-mgr”
• reg: SPI chip select
• spi-max-frequency: Maximum SPI frequency (>=1000000, <=25000000)
• cdone-gpios: GPIO input connected to CDONE pin
• reset-gpios: Active-low GPIO output connected to CRESET_B pin. Note

        that unless the GPIO is held low during startup, the
        FPGA will enter Master SPI mode and drive SCK with a
        clock signal potentially jamming other devices on the
        bus until the firmware is loaded.
  

Example:
fpga: fpga@0 {
compatible = “lattice,ice40-fpga-mgr”;
reg = <0>;
spi-max-frequency = <1000000>;
cdone-gpios = <&gpio 24 GPIO_ACTIVE_HIGH>;
reset-gpios = <&gpio 22 GPIO_ACTIVE_LOW>;
};