1Common leds properties. 2 3LED and flash LED devices provide the same basic functionality as current 4regulators, but extended with LED and flash LED specific features like 5blinking patterns, flash timeout, flash faults and external flash strobe mode. 6 7Many LED devices expose more than one current output that can be connected 8to one or more discrete LED component. Since the arrangement of connections 9can influence the way of the LED device initialization, the LED components 10have to be tightly coupled with the LED device binding. They are represented 11by child nodes of the parent LED device binding. 12 13Optional properties for child nodes: 14- led-sources : List of device current outputs the LED is connected to. The 15 outputs are identified by the numbers that must be defined 16 in the LED device binding documentation. 17- label : The label for this LED. If omitted, the label is 18 taken from the node name (excluding the unit address). 19 20- linux,default-trigger : This parameter, if present, is a 21 string defining the trigger assigned to the LED. Current triggers are: 22 "backlight" - LED will act as a back-light, controlled by the framebuffer 23 system 24 "default-on" - LED will turn on (but for leds-gpio see "default-state" 25 property in Documentation/devicetree/bindings/gpio/led.txt) 26 "heartbeat" - LED "double" flashes at a load average based rate 27 "ide-disk" - LED indicates disk activity 28 "timer" - LED flashes at a fixed, configurable rate 29 30- max-microamp : maximum intensity in microamperes of the LED 31 (torch LED for flash devices) 32- flash-max-microamp : maximum intensity in microamperes of the 33 flash LED; it is mandatory if the LED should 34 support the flash mode 35- flash-timeout-us : timeout in microseconds after which the flash 36 LED is turned off 37 38 39Examples: 40 41system-status { 42 label = "Status"; 43 linux,default-trigger = "heartbeat"; 44 ... 45}; 46 47camera-flash { 48 label = "Flash"; 49 led-sources = <0>, <1>; 50 max-microamp = <50000>; 51 flash-max-microamp = <320000>; 52 flash-timeout-us = <500000>; 53}; 54