1*4882a593SmuzhiyunLED connected to PWM 2*4882a593Smuzhiyun 3*4882a593SmuzhiyunRequired properties: 4*4882a593Smuzhiyun- compatible : should be "pwm-leds". 5*4882a593Smuzhiyun 6*4882a593SmuzhiyunEach LED is represented as a sub-node of the pwm-leds device. Each 7*4882a593Smuzhiyunnode's name represents the name of the corresponding LED. 8*4882a593Smuzhiyun 9*4882a593SmuzhiyunLED sub-node properties: 10*4882a593Smuzhiyun- pwms : PWM property to point to the PWM device (phandle)/port (id) and to 11*4882a593Smuzhiyun specify the period time to be used: <&phandle id period_ns>; 12*4882a593Smuzhiyun- pwm-names : (optional) Name to be used by the PWM subsystem for the PWM device 13*4882a593Smuzhiyun For the pwms and pwm-names property please refer to: 14*4882a593Smuzhiyun Documentation/devicetree/bindings/pwm/pwm.txt 15*4882a593Smuzhiyun- max-brightness : Maximum brightness possible for the LED 16*4882a593Smuzhiyun- active-low : (optional) For PWMs where the LED is wired to supply 17*4882a593Smuzhiyun rather than ground. 18*4882a593Smuzhiyun- label : (optional) 19*4882a593Smuzhiyun see Documentation/devicetree/bindings/leds/common.txt 20*4882a593Smuzhiyun- linux,default-trigger : (optional) 21*4882a593Smuzhiyun see Documentation/devicetree/bindings/leds/common.txt 22*4882a593Smuzhiyun 23*4882a593SmuzhiyunExample: 24*4882a593Smuzhiyun 25*4882a593Smuzhiyuntwl_pwm: pwm { 26*4882a593Smuzhiyun /* provides two PWMs (id 0, 1 for PWM1 and PWM2) */ 27*4882a593Smuzhiyun compatible = "ti,twl6030-pwm"; 28*4882a593Smuzhiyun #pwm-cells = <2>; 29*4882a593Smuzhiyun}; 30*4882a593Smuzhiyun 31*4882a593Smuzhiyuntwl_pwmled: pwmled { 32*4882a593Smuzhiyun /* provides one PWM (id 0 for Charing indicator LED) */ 33*4882a593Smuzhiyun compatible = "ti,twl6030-pwmled"; 34*4882a593Smuzhiyun #pwm-cells = <2>; 35*4882a593Smuzhiyun}; 36*4882a593Smuzhiyun 37*4882a593Smuzhiyunpwmleds { 38*4882a593Smuzhiyun compatible = "pwm-leds"; 39*4882a593Smuzhiyun kpad { 40*4882a593Smuzhiyun label = "omap4::keypad"; 41*4882a593Smuzhiyun pwms = <&twl_pwm 0 7812500>; 42*4882a593Smuzhiyun max-brightness = <127>; 43*4882a593Smuzhiyun }; 44*4882a593Smuzhiyun 45*4882a593Smuzhiyun charging { 46*4882a593Smuzhiyun label = "omap4:green:chrg"; 47*4882a593Smuzhiyun pwms = <&twl_pwmled 0 7812500>; 48*4882a593Smuzhiyun max-brightness = <255>; 49*4882a593Smuzhiyun }; 50*4882a593Smuzhiyun}; 51