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