device-tree-bindings/leds/leds-gpio.txt

4 - compatible : should be "gpio-leds".
6 Each LED is represented as a sub-node of the gpio-leds device.  Each
9 LED sub-node properties:
10 - gpios :  Should specify the LED's GPIO, see "gpios property" in
13 - label :  (optional)
15 - linux,default-trigger :  (optional)
17 - default-state:  (optional) The initial state of the LED.  Valid
18   values are "on", "off", and "keep".  If the LED is already on or off
19   and the default-state property is set the to same value, then no
20   glitch should be produced where the LED momentarily turns off (or
22   state is, without producing a glitch.  The default is off if this
28 	compatible = "gpio-leds";
31 		gpios = <&mcu_pio 0 1>; /* Active low */
32 		linux,default-trigger = "ide-disk";
36 		gpios = <&mcu_pio 1 0>;
38 		default-state = "keep";
42 run-control {
43 	compatible = "gpio-leds";
45 		gpios = <&mpc8572 6 0>;
46 		default-state = "off";
49 		gpios = <&mpc8572 7 0>;
50 		default-state = "on";