1LED connected to PWM
2
3Required properties:
4- compatible : should be "pwm-leds".
5
6Each LED is represented as a sub-node of the pwm-leds device.  Each
7node's name represents the name of the corresponding LED.
8
9LED sub-node properties:
10- pwms : PWM property to point to the PWM device (phandle)/port (id) and to
11  specify the period time to be used: <&phandle id period_ns>;
12- pwm-names : (optional) Name to be used by the PWM subsystem for the PWM device
13  For the pwms and pwm-names property please refer to:
14  Documentation/devicetree/bindings/pwm/pwm.txt
15- max-brightness : Maximum brightness possible for the LED
16- active-low : (optional) For PWMs where the LED is wired to supply
17  rather than ground.
18- label :  (optional)
19  see Documentation/devicetree/bindings/leds/common.txt
20- linux,default-trigger :  (optional)
21  see Documentation/devicetree/bindings/leds/common.txt
22
23Example:
24
25twl_pwm: pwm {
26	/* provides two PWMs (id 0, 1 for PWM1 and PWM2) */
27	compatible = "ti,twl6030-pwm";
28	#pwm-cells = <2>;
29};
30
31twl_pwmled: pwmled {
32	/* provides one PWM (id 0 for Charing indicator LED) */
33	compatible = "ti,twl6030-pwmled";
34	#pwm-cells = <2>;
35};
36
37pwmleds {
38	compatible = "pwm-leds";
39	kpad {
40		label = "omap4::keypad";
41		pwms = <&twl_pwm 0 7812500>;
42		max-brightness = <127>;
43	};
44
45	charging {
46		label = "omap4:green:chrg";
47		pwms = <&twl_pwmled 0 7812500>;
48		max-brightness = <255>;
49	};
50};
51