boards: arm: adafruit_kb2040: add led-strip configuration

Adafruit KB2040 has one NeoPixel(WS2812) LED that
attaches to GPIO17 pin.
Add configuration for it.

Signed-off-by: TOKITA Hiroshi <[email protected]>

Author: soburi

boards/arm/adafruit_kb2040/adafruit_kb2040-pinctrl.dtsi

@@ -50,4 +50,10 @@
 
 	clocks_default: clocks_default {
 	};
+
+	ws2812_pio0_default: ws2812_pio0_default {
+		ws2812 {
+			pinmux = <PIO0_P17>;
+		};
+	};
 };

boards/arm/adafruit_kb2040/adafruit_kb2040.dts

@@ -11,6 +11,7 @@
 #include "adafruit_kb2040-pinctrl.dtsi"
 #include "sparkfun_pro_micro_connector.dtsi"
 #include <freq.h>
+#include <zephyr/dt-bindings/led/led.h>
 
 / {
 	chosen {
@@ -24,6 +25,7 @@
 
 	aliases {
 		watchdog0 = &wdt0;
+		led-strip = &ws2812;
 	};
 };
 
@@ -94,6 +96,29 @@
 	pinctrl-names = "default";
 };
 
+&pio0 {
+	status = "okay";
+
+	pio-ws2812 {
+		compatible = "worldsemi,ws2812-rpi_pico-pio";
+		status = "okay";
+		pinctrl-0 = <&ws2812_pio0_default>;
+		pinctrl-names = "default";
+		bit-waveform = <3>, <3>, <4>;
+
+		ws2812: ws2812 {
+			status = "okay";
+			output-pin = <17>;
+			chain-length = <1>;
+			color-mapping = <LED_COLOR_ID_GREEN
+					 LED_COLOR_ID_RED
+					 LED_COLOR_ID_BLUE>;
+			reset-delay = <280>;
+			frequency = <800000>;
+		};
+	};
+};
+
 zephyr_udc0: &usbd {
 	status = "okay";
 };