Commit | Line | Data |
---|---|---|
08541cbc PU |
1 | LED connected to PWM |
2 | ||
3 | Required properties: | |
4 | - compatible : should be "pwm-leds". | |
5 | ||
6 | Each LED is represented as a sub-node of the pwm-leds device. Each | |
7 | node's name represents the name of the corresponding LED. | |
8 | ||
9 | LED 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 | |
b0571e7e RK |
16 | - active-low : (optional) For PWMs where the LED is wired to supply |
17 | rather than ground. | |
08541cbc PU |
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 | ||
23 | Example: | |
24 | ||
25 | twl_pwm: pwm { | |
26 | /* provides two PWMs (id 0, 1 for PWM1 and PWM2) */ | |
27 | compatible = "ti,twl6030-pwm"; | |
28 | #pwm-cells = <2>; | |
29 | }; | |
30 | ||
31 | twl_pwmled: pwmled { | |
32 | /* provides one PWM (id 0 for Charing indicator LED) */ | |
33 | compatible = "ti,twl6030-pwmled"; | |
34 | #pwm-cells = <2>; | |
35 | }; | |
36 | ||
37 | pwmleds { | |
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 | }; |