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1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)2%YAML 1.23---4$id: http://devicetree.org/schemas/leds/backlight/kinetic,ktz8866.yaml#5$schema: http://devicetree.org/meta-schemas/core.yaml#6 7title: Kinetic Technologies KTZ8866 backlight8 9maintainers:10 - Jianhua Lu <lujianhua000@gmail.com>11 12description: |13 The Kinetic Technologies KTZ8866 is a high efficiency 6-channels-current-sinks14 led backlight with dual lcd bias power.15 https://www.kinet-ic.com/ktz8866/16 17allOf:18 - $ref: common.yaml#19 20properties:21 compatible:22 const: kinetic,ktz886623 24 reg:25 maxItems: 126 27 vddpos-supply:28 description: positive boost supply regulator.29 30 vddneg-supply:31 description: negative boost supply regulator.32 33 enable-gpios:34 description: GPIO to use to enable/disable the backlight (HWEN pin).35 maxItems: 136 37 current-num-sinks:38 description: number of the LED current sinks' channels.39 $ref: /schemas/types.yaml#/definitions/uint3240 enum: [1, 2, 3, 4, 5, 6]41 42 kinetic,current-ramp-delay-ms:43 description: |44 LED current ramping delay time in milliseconds, note that the45 case 1 will be mapped to 1μs.46 enum: [1, 2, 4, 8, 16, 32, 64, 128, 192, 256, 320, 384, 448, 512, 576, 640]47 48 kinetic,led-enable-ramp-delay-ms:49 description: |50 LED on/off ramping delay time in milliseconds, note that the case 0 will be51 mapped to 512μs because ktz8866 can't ramp faster than it.52 enum: [0, 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384]53 54 kinetic,enable-lcd-bias:55 description: Set if we want to output bias power supply for LCD.56 type: boolean57 58required:59 - compatible60 - reg61 - vddpos-supply62 - vddneg-supply63 - enable-gpios64 65unevaluatedProperties: false66 67examples:68 - |69 #include <dt-bindings/gpio/gpio.h>70 71 i2c {72 #address-cells = <1>;73 #size-cells = <0>;74 75 backlight@11 {76 compatible = "kinetic,ktz8866";77 reg = <0x11>;78 vddpos-supply = <&bl_vddpos_5p5>;79 vddneg-supply = <&bl_vddneg_5p5>;80 enable-gpios = <&tlmm 139 GPIO_ACTIVE_HIGH>;81 current-num-sinks = <5>;82 kinetic,current-ramp-delay-ms = <128>;83 kinetic,led-enable-ramp-delay-ms = <1>;84 kinetic,enable-lcd-bias;85 };86 };87