#include &spi1 { compatible = "nordic,nrf-spim"; status = "okay"; mosi-pin = <38>; // Unused pins, needed for SPI definition, but not used by the ws2812 driver itself. sck-pin = <12>; // 0.12 is not broken out on the nRFMicro miso-pin = <22>; // 0.22 is not broken out on the nRFMicro led_strip: ws2812@0 { compatible = "worldsemi,ws2812-spi"; label = "WS2812"; /* SPI */ reg = <0>; /* ignored, but necessary for SPI bindings */ spi-max-frequency = <4000000>; /* WS2812 */ chain-length = <2>; spi-one-frame = <0x70>; spi-zero-frame = <0x40>; color-mapping = ; }; }; / { chosen { zmk,underglow = &led_strip; }; };