tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1Lattice iCE40 FPGA Manager
2
3Required properties:
4- compatible: Should contain "lattice,ice40-fpga-mgr"
5- reg: SPI chip select
6- spi-max-frequency: Maximum SPI frequency (>=1000000, <=25000000)
7- cdone-gpios: GPIO input connected to CDONE pin
8- reset-gpios: Active-low GPIO output connected to CRESET_B pin. Note
9 that unless the GPIO is held low during startup, the
10 FPGA will enter Master SPI mode and drive SCK with a
11 clock signal potentially jamming other devices on the
12 bus until the firmware is loaded.
13
14Example:
15 fpga: fpga@0 {
16 compatible = "lattice,ice40-fpga-mgr";
17 reg = <0>;
18 spi-max-frequency = <1000000>;
19 cdone-gpios = <&gpio 24 GPIO_ACTIVE_HIGH>;
20 reset-gpios = <&gpio 22 GPIO_ACTIVE_LOW>;
21 };