#include &pinctrl { spi1_default: spi1_default { group1 { psels = ; }; }; spi1_sleep: spi1_sleep { group1 { psels = ; low-power-enable; }; }; }; &spi1 { compatible = "nordic,nrf-spim"; status = "okay"; pinctrl-0 = <&spi1_default>; pinctrl-1 = <&spi1_sleep>; pinctrl-names = "default", "sleep"; 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 = <10>; /* arbitrary; change at will */ spi-one-frame = <0x70>; spi-zero-frame = <0x40>; color-mapping = ; }; }; / { chosen { zmk,underglow = &led_strip; }; };