diff options
Diffstat (limited to 'Documentation/devicetree/bindings/leds/leds-pwm.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/leds/leds-pwm.txt | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/leds/leds-pwm.txt b/Documentation/devicetree/bindings/leds/leds-pwm.txt new file mode 100644 index 000000000..6c6583c35 --- /dev/null +++ b/Documentation/devicetree/bindings/leds/leds-pwm.txt @@ -0,0 +1,50 @@ +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 +- active-low : (optional) For PWMs where the LED is wired to supply + rather than ground. +- 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>; + }; +}; |