samples: drivers led strip ws2812 overlay for stm32 nucleo

The spi node of the led_ws2812 now includes the frame format
as defined by the dts bindings spi-device.yaml
SPI_FRAME_FORMAT_TI is selected with overlay for target boards.

Signed-off-by: Francois Ramu <[email protected]>

Author: FRASTM

samples/drivers/led_ws2812/boards/nucleo_f070rb.overlay

@@ -19,6 +19,7 @@
 		/* SPI */
 		reg = <0>; /* ignored, but necessary for SPI bindings */
 		spi-max-frequency = <B1414_SPI_FREQ>;
+		frame-format = <32768>; /* SPI_FRAME_FORMAT_TI */
 
 		/* B1414 */
 		chain-length = <18>; /* arbitrary; change at will */

samples/drivers/led_ws2812/boards/nucleo_g071rb.overlay

@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2021, STMicroelectronics
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <dt-bindings/led/led.h>
+
+&arduino_spi {
+	led_strip: ws2812@0 {
+		compatible = "worldsemi,ws2812-spi";
+		label = "WS2812";
+
+		/* SPI */
+		reg = <0>; /* ignored, but necessary for SPI bindings */
+		spi-max-frequency = <4000000>;
+		frame-format = <32768>; /* SPI_FRAME_FORMAT_TI */
+
+		/* WS2812 */
+		chain-length = <16>; /* arbitrary; change at will */
+		spi-one-frame = <0x70>;
+		spi-zero-frame = <0x40>;
+		color-mapping = <LED_COLOR_ID_GREEN
+				 LED_COLOR_ID_RED
+				 LED_COLOR_ID_BLUE>;
+	};
+};
+
+/ {
+	aliases {
+		led-strip = &led_strip;
+	};
+};

samples/drivers/led_ws2812/boards/nucleo_l476rg.overlay

@@ -14,6 +14,7 @@
 		/* SPI */
 		reg = <0>; /* ignored, but necessary for SPI bindings */
 		spi-max-frequency = <4000000>;
+		frame-format = <32768>; /* SPI_FRAME_FORMAT_TI */
 
 		/* WS2812 */
 		chain-length = <16>; /* arbitrary; change at will */