Touche

#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/led/led.h>

&arduino_spi {
    status = "okay";
    compatible = "nordic,nrf-spim";
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 = <12>;
               color-mapping = <
                   LED_COLOR_ID_GREEN
                   LED_COLOR_ID_RED
                   LED_COLOR_ID_BLUE
                   >;
               spi-one-frame = <0x70>;
               spi-zero-frame = <0x40>;
           };
};

/ {
    aliases {
        led-strip = &led_strip;
    };
};