xref: /linux/Documentation/devicetree/bindings/leds/backlight/richtek,rt4831-backlight.yaml (revision 4f2c0a4acffbec01079c28f839422e64ddeff004)
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/leds/backlight/richtek,rt4831-backlight.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Richtek RT4831 Backlight
8
9maintainers:
10  - ChiYuan Huang <cy_huang@richtek.com>
11
12description: |
13  RT4831 is a mutifunctional device that can provide power to the LCD display
14  and LCD backlight.
15
16  For the LCD backlight, it can provide four channel WLED driving capability.
17  Each channel driving current is up to 30mA
18
19  Datasheet is available at
20  https://www.richtek.com/assets/product_file/RT4831A/DS4831A-05.pdf
21
22allOf:
23  - $ref: common.yaml#
24
25properties:
26  compatible:
27    const: richtek,rt4831-backlight
28
29  default-brightness:
30    minimum: 0
31    maximum: 2048
32
33  max-brightness:
34    minimum: 0
35    maximum: 2048
36
37  richtek,pwm-enable:
38    description: |
39      Specify the backlight dimming following by PWM duty or by SW control.
40    type: boolean
41
42  richtek,bled-ovp-sel:
43    description: |
44      Backlight OVP level selection, currently support 17V/21V/25V/29V.
45    $ref: /schemas/types.yaml#/definitions/uint8
46    default: 1
47    minimum: 0
48    maximum: 3
49
50  richtek,bled-ocp-microamp:
51    description: |
52      Backlight over current protection level.
53    enum: [900000, 1200000, 1500000, 1800000]
54
55  richtek,channel-use:
56    description: |
57      Backlight LED channel to be used.
58      BIT 0/1/2/3 is used to indicate led channel 1/2/3/4 enable or disable.
59    $ref: /schemas/types.yaml#/definitions/uint8
60    minimum: 1
61    maximum: 15
62
63required:
64  - compatible
65  - richtek,channel-use
66
67additionalProperties: false
68