worldsemi,ws2812-pulse-io

Description

Worldsemi WS2812 LED strip, pulse_io binding

Drives a WS2812 (or compatible) LED strip through a pulse_io
controller channel in CELL mode.

Examples

/ {
      led_strip: ws2812 {
          compatible = "worldsemi,ws2812-pulse-io";
          pulse-ios = <&rmt 0>;
          chain-length = <1>;
          color-mapping = <LED_COLOR_ID_GREEN
                           LED_COLOR_ID_RED
                           LED_COLOR_ID_BLUE>;
      };
};

Properties

Node specific properties

Properties not inherited from the base binding file.

Name

Type

Details

pulse-ios

phandle-array

 
pulse_io controller and transmit channel driving the strip
data line. The pin is routed through the controller pinctrl
state.

This property is required.

reset-delay

int

 
Minimum delay to wait (in microseconds) to make sure that the strip has
latched the signal. If omitted, a default value of 8 microseconds is used.
This default is good for the WS2812 controllers. Note that despite the
WS2812 datasheet states that a 50 microseconds delay is required, it seems
6 microseconds is enough. The default is set to 8 microseconds just to be
safe.

Default value: 8

chain-length

int

 
The number of devices in the daisy-chain.

This property is required.

color-mapping

array

 
Channel to color mapping (or pixel order).

For example a GRB channel to color mapping would be

   color-mapping = <LED_COLOR_ID_GREEN
                    LED_COLOR_ID_RED
                    LED_COLOR_ID_BLUE>;

This property is required.

Deprecated node specific properties

Deprecated properties not inherited from the base binding file.

(None)

Base properties

Properties inherited from the base binding file, which defines common properties that may be set on many nodes. Not all of these may apply to the “worldsemi,ws2812-pulse-io” compatible.

(None)