0001 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
0002 %YAML 1.2
0003 ---
0004 $id: http://devicetree.org/schemas/leds/backlight/richtek,rt4831-backlight.yaml#
0005 $schema: http://devicetree.org/meta-schemas/core.yaml#
0006
0007 title: Richtek RT4831 Backlight
0008
0009 maintainers:
0010 - ChiYuan Huang <cy_huang@richtek.com>
0011
0012 description: |
0013 RT4831 is a mutifunctional device that can provide power to the LCD display
0014 and LCD backlight.
0015
0016 For the LCD backlight, it can provide four channel WLED driving capability.
0017 Each channel driving current is up to 30mA
0018
0019 Datasheet is available at
0020 https://www.richtek.com/assets/product_file/RT4831A/DS4831A-05.pdf
0021
0022 allOf:
0023 - $ref: common.yaml#
0024
0025 properties:
0026 compatible:
0027 const: richtek,rt4831-backlight
0028
0029 default-brightness:
0030 minimum: 0
0031 maximum: 2048
0032
0033 max-brightness:
0034 minimum: 0
0035 maximum: 2048
0036
0037 richtek,pwm-enable:
0038 description: |
0039 Specify the backlight dimming following by PWM duty or by SW control.
0040 type: boolean
0041
0042 richtek,bled-ovp-sel:
0043 description: |
0044 Backlight OVP level selection, currently support 17V/21V/25V/29V.
0045 $ref: /schemas/types.yaml#/definitions/uint8
0046 default: 1
0047 minimum: 0
0048 maximum: 3
0049
0050 richtek,bled-ocp-microamp:
0051 description: |
0052 Backlight over current protection level.
0053 enum: [900000, 1200000, 1500000, 1800000]
0054
0055 richtek,channel-use:
0056 description: |
0057 Backlight LED channel to be used.
0058 BIT 0/1/2/3 is used to indicate led channel 1/2/3/4 enable or disable.
0059 $ref: /schemas/types.yaml#/definitions/uint8
0060 minimum: 1
0061 maximum: 15
0062
0063 required:
0064 - compatible
0065 - richtek,channel-use
0066
0067 additionalProperties: false
