1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/leds/leds-pwm.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: LEDs connected to PWM
8
9maintainers:
10  - Pavel Machek <pavel@ucw.cz>
11
12description:
13  Each LED is represented as a sub-node of the pwm-leds device.  Each
14  node's name represents the name of the corresponding LED.
15
16properties:
17  compatible:
18    const: pwm-leds
19
20patternProperties:
21  "^led(-[0-9a-f]+)?$":
22    type: object
23    $ref: common.yaml#
24    unevaluatedProperties: false
25
26    properties:
27      pwms:
28        maxItems: 1
29
30      pwm-names: true
31
32      max-brightness:
33        description:
34          Maximum brightness possible for the LED
35        $ref: /schemas/types.yaml#/definitions/uint32
36
37      active-low:
38        description:
39          For PWMs where the LED is wired to supply rather than ground.
40        type: boolean
41
42    required:
43      - pwms
44      - max-brightness
45
46additionalProperties: false
47
48examples:
49  - |
50
51    #include <dt-bindings/leds/common.h>
52
53    led-controller {
54        compatible = "pwm-leds";
55
56        led-1 {
57            label = "omap4::keypad";
58            pwms = <&twl_pwm 0 7812500>;
59            max-brightness = <127>;
60        };
61
62        led-2 {
63            color = <LED_COLOR_ID_GREEN>;
64            function = LED_FUNCTION_CHARGING;
65            pwms = <&twl_pwmled 0 7812500>;
66            max-brightness = <255>;
67        };
68    };
69
70...
71