| LED connected to PWM |
| |
| Required properties: |
| - compatible : should be "pwm-leds". |
| |
| Each LED is represented as a sub-node of the pwm-leds device. Each |
| node's name represents the name of the corresponding LED. |
| |
| LED sub-node properties: |
| - pwms : PWM property to point to the PWM device (phandle)/port (id) and to |
| specify the period time to be used: <&phandle id period_ns>; |
| - pwm-names : (optional) Name to be used by the PWM subsystem for the PWM device |
| For the pwms and pwm-names property please refer to: |
| Documentation/devicetree/bindings/pwm/pwm.txt |
| - max-brightness : Maximum brightness possible for the LED |
| - label : (optional) |
| see Documentation/devicetree/bindings/leds/common.txt |
| - linux,default-trigger : (optional) |
| see Documentation/devicetree/bindings/leds/common.txt |
| |
| Example: |
| |
| twl_pwm: pwm { |
| /* provides two PWMs (id 0, 1 for PWM1 and PWM2) */ |
| compatible = "ti,twl6030-pwm"; |
| #pwm-cells = <2>; |
| }; |
| |
| twl_pwmled: pwmled { |
| /* provides one PWM (id 0 for Charing indicator LED) */ |
| compatible = "ti,twl6030-pwmled"; |
| #pwm-cells = <2>; |
| }; |
| |
| pwmleds { |
| compatible = "pwm-leds"; |
| kpad { |
| label = "omap4::keypad"; |
| pwms = <&twl_pwm 0 7812500>; |
| max-brightness = <127>; |
| }; |
| |
| charging { |
| label = "omap4:green:chrg"; |
| pwms = <&twl_pwmled 0 7812500>; |
| max-brightness = <255>; |
| }; |
| }; |
