Update nice_nano_v2.overlay

config/boards/nice_nano_v2.overlay

@@ -1,27 +1,14 @@
 #include <dt-bindings/led/led.h>
 
-&pinctrl {
-    spi3_default: spi3_default {
-        group1 {
-            psels = <NRF_PSEL(SPIM_MOSI, 0, 6)>;
-        };
-    };
 
-    spi3_sleep: spi3_sleep {
-        group1 {
-            psels = <NRF_PSEL(SPIM_MOSI, 0, 6)>;
-            low-power-enable;
-		};
-	};
-};
-
-&spi3 {
+&spi1 {
 	compatible = "nordic,nrf-spim";
+	/* Cannot be used together with i2c0. */
 	status = "okay";
-
-	pinctrl-0 = <&spi3_default>;
-	pinctrl-1 = <&spi3_sleep>;
-	pinctrl-names = "default", "sleep";
+	mosi-pin = <6>;
+	// Unused pins, needed for SPI definition, but not used by the ws2812 driver itself.
+	sck-pin = <5>;
+	miso-pin = <7>;
 
 	led_strip: ws2812@0 {
 		compatible = "worldsemi,ws2812-spi";
@@ -32,10 +19,9 @@
 		spi-max-frequency = <4000000>;
 
 		/* WS2812 */
-		chain-length = <26>; /* arbitrary; change at will */
+		chain-length = <26>; /* There are per-key RGB, but the first 6 are underglow */
 		spi-one-frame = <0x70>;
 		spi-zero-frame = <0x40>;
-
 		color-mapping = <LED_COLOR_ID_GREEN LED_COLOR_ID_RED LED_COLOR_ID_BLUE>;
 	};
 };