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+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/worldsemi,ws2812b-spi.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: WS2812B LEDs driven using SPI
+
+maintainers:
+ - Chuanhong Guo <gch981213@gmail.com>
+
+description: |
+ WorldSemi WS2812B is a individually addressable LED chip that can be chained
+ together and controlled individually using a single wire.
+ This driver simulates the protocol used by this LED chip with SPI bus.
+ Typical setups includes connecting the data pin of the LED chain to MOSI as
+ the only device or using CS and MOSI with a tri-state voltage-level shifter
+ for the data pin.
+ The SPI frequency needs to be 2.105MHz~2.85MHz for the timing to be correct
+ and the controller needs to send all the bytes continuously.
+
+allOf:
+ - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+properties:
+ compatible:
+ const: worldsemi,ws2812b-spi
+
+ reg:
+ description: The chip-select line on the SPI bus
+ maxItems: 1
+
+ spi-max-frequency:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description:
+ Maximum SPI clocking speed of the device in Hz.
+ minimum: 2105000
+ maximum: 2850000
+
+ "#address-cells":
+ const: 1
+
+ "#size-cells":
+ const: 0
+
+patternProperties:
+ "^multi-led(@[0-9a-f])?$":
+ type: object
+ $ref: leds-class-multicolor.yaml#
+
+ properties:
+ color-index:
+ description: |
+ A 3-item array specifying color of each components in this LED. It
+ should be one of the LED_COLOR_ID_* prefixed definitions from the
+ header include/dt-bindings/leds/common.h. Defaults to
+ <LED_COLOR_ID_GREEN LED_COLOR_ID_RED LED_COLOR_ID_BLUE>
+ if unspecified.
+ $ref: /schemas/types.yaml#/definitions/uint32-array
+ minItems: 3
+ maxItems: 3
+
+ default-intensity:
+ description: |
+ An array of 3 integer specifying the default intensity of each color
+ components in this LED. <255 255 255> if unspecified.
+ $ref: /schemas/types.yaml#/definitions/uint32-array
+ minItems: 3
+ maxItems: 3
+ items:
+ minimum: 0
+ maximum: 255
+
+ reg:
+ description: |
+ Which LED this node represents. The reg of the first LED on the chain
+ is 0.
+
+ required:
+ - reg
+ - color
+ - function
+
+required:
+ - compatible
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/leds/common.h>
+ spi {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ ws2812b@0 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "worldsemi,ws2812b-spi";
+ reg = <0>;
+ spi-max-frequency = <2850000>;
+ multi-led@0 {
+ reg = <0>;
+ color-index = <LED_COLOR_ID_RED LED_COLOR_ID_GREEN LED_COLOR_ID_BLUE>;
+ default-intensity = <10 50 90>;
+ color = <LED_COLOR_ID_RGB>;
+ function = LED_FUNCTION_STATUS;
+ function-enumerator = <0>;
+ };
+ multi-led@1 {
+ reg = <1>;
+ color = <LED_COLOR_ID_RGB>;
+ function = LED_FUNCTION_STATUS;
+ function-enumerator = <1>;
+ };
+ multi-led@2 {
+ reg = <2>;
+ color = <LED_COLOR_ID_RGB>;
+ function = LED_FUNCTION_STATUS;
+ function-enumerator = <2>;
+ };
+ multi-led@3 {
+ reg = <3>;
+ color = <LED_COLOR_ID_RGB>;
+ function = LED_FUNCTION_STATUS;
+ function-enumerator = <3>;
+ };
+ };
+ };
+
+...
This patch adds dt binding schema for WorldSemi WS2812B driven using SPI bus. Signed-off-by: Chuanhong Guo <gch981213@gmail.com> --- .../bindings/leds/worldsemi,ws2812b-spi.yaml | 131 ++++++++++++++++++ 1 file changed, 131 insertions(+) create mode 100644 Documentation/devicetree/bindings/leds/worldsemi,ws2812b-spi.yaml