| Optional properties for child nodes: |
| - label : The label for this LED. If omitted, the label is |
| taken from the node name (excluding the unit address). |
| - linux,default-trigger : This parameter, if present, is a |
| string defining the trigger assigned to the LED. Current triggers are: |
| "backlight" - LED will act as a back-light, controlled by the framebuffer |
| "default-on" - LED will turn on (but for leds-gpio see "default-state" |
| property in Documentation/devicetree/bindings/gpio/led.txt) |
| "heartbeat" - LED "double" flashes at a load average based rate |
| "ide-disk" - LED indicates disk activity |
| "timer" - LED flashes at a fixed, configurable rate |
| linux,default-trigger = "heartbeat"; |