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