0001 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
0002 %YAML 1.2
0003 ---
0004 $id: http://devicetree.org/schemas/leds/leds-pwm.yaml#
0005 $schema: http://devicetree.org/meta-schemas/core.yaml#
0006
0007 title: LEDs connected to PWM
0008
0009 maintainers:
0010 - Pavel Machek <pavel@ucw.cz>
0011
0012 description:
0013 Each LED is represented as a sub-node of the pwm-leds device. Each
0014 node's name represents the name of the corresponding LED.
0015
0016 properties:
0017 compatible:
0018 const: pwm-leds
0019
0020 patternProperties:
0021 "^led(-[0-9a-f]+)?$":
0022 type: object
0023
0024 $ref: common.yaml#
0025
0026 properties:
0027 pwms:
0028 maxItems: 1
0029
0030 pwm-names: true
0031
0032 max-brightness:
0033 description:
0034 Maximum brightness possible for the LED
0035 $ref: /schemas/types.yaml#/definitions/uint32
0036
0037 active-low:
0038 description:
0039 For PWMs where the LED is wired to supply rather than ground.
0040 type: boolean
0041
0042 required:
0043 - pwms
0044 - max-brightness
0045
0046 additionalProperties: false
0047
0048 examples:
0049 - |
0050
0051 #include <dt-bindings/leds/common.h>
0052
0053 led-controller {
0054 compatible = "pwm-leds";
0055
0056 led-1 {
0057 label = "omap4::keypad";
0058 pwms = <&twl_pwm 0 7812500>;
0059 max-brightness = <127>;
0060 };
0061
0062 led-2 {
0063 color = <LED_COLOR_ID_GREEN>;
0064 function = LED_FUNCTION_CHARGING;
0065 pwms = <&twl_pwmled 0 7812500>;
0066 max-brightness = <255>;
0067 };
0068 };
0069
0070 ...
