tests: drivers: build_all: led_strip: Add build test for ws2812-uart driver

This commit adds a build test for the new `worldsemi,ws2812-uart`
driver. A devicetree node for the driver is added to the app.overlay,
instantiated on a `vnd,serial` test UART.

Signed-off-by: Wai-Hong Tam <[email protected]>

Author: waihongtam

tests/drivers/build_all/led_strip/app.overlay

@@ -84,5 +84,29 @@
 				spi-zero-frame = <2>;
 			};
 		};
+
+		test_uart: uart@55556666 {
+			compatible = "vnd,serial";
+			reg = <0x55556666 0x100>;
+			status = "okay";
+			current-speed = <2500000>;
+			data-bits = <7>;
+			tx-invert;
+
+			test_ws2812_uart: ws2812-strip {
+				compatible = "worldsemi,ws2812-uart";
+				status = "okay";
+
+				one-symbol = <6>;   /* 0b110 */
+				zero-symbol = <4>;  /* 0b100 */
+				bits-per-symbol = <3>;
+
+				chain-length = <8>;
+				reset-delay = <50>;
+				color-mapping = <LED_COLOR_ID_GREEN
+						 LED_COLOR_ID_RED
+						 LED_COLOR_ID_BLUE>;
+			};
+		};
 	};
 };

tests/drivers/build_all/led_strip/prj.conf

@@ -3,4 +3,5 @@ CONFIG_TEST_USERSPACE=y
 
 CONFIG_GPIO=y
 CONFIG_SPI=y
+CONFIG_SERIAL=y
 CONFIG_LED_STRIP=y