78 lines
2.1 KiB
YAML
78 lines
2.1 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/leds/backlight/kinetic,ktz8866.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Kinetic Technologies KTZ8866 backlight
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maintainers:
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- Jianhua Lu <lujianhua000@gmail.com>
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description: |
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The Kinetic Technologies KTZ8866 is a high efficiency 6-channels-current-sinks
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led backlight with dual lcd bias power.
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https://www.kinet-ic.com/ktz8866/
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allOf:
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- $ref: common.yaml#
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properties:
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compatible:
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const: kinetic,ktz8866
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vddpos-supply:
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description: positive boost supply regulator.
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vddneg-supply:
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description: negative boost supply regulator.
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enable-gpios:
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description: GPIO to use to enable/disable the backlight (HWEN pin).
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maxItems: 1
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current-num-sinks:
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description: number of the LED current sinks' channels.
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$ref: /schemas/types.yaml#/definitions/uint32
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enum: [1, 2, 3, 4, 5, 6]
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kinetic,current-ramp-delay-ms:
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description: |
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LED current ramping delay time in milliseconds, note that the
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case 1 will be mapped to 1μs.
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enum: [1, 2, 4, 8, 16, 32, 64, 128, 192, 256, 320, 384, 448, 512, 576, 640]
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kinetic,led-enable-ramp-delay-ms:
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description: |
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LED on/off ramping delay time in milliseconds, note that the case 0 will be
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mapped to 512μs because ktz8866 can't ramp faster than it.
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enum: [0, 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384]
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kinetic,enable-lcd-bias:
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description: Set if we want to output bias power supply for LCD.
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type: boolean
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required:
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- compatible
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- vddpos-supply
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- vddneg-supply
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- enable-gpios
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unevaluatedProperties: false
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examples:
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- |
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#include <dt-bindings/gpio/gpio.h>
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backlight {
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compatible = "kinetic,ktz8866";
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vddpos-supply = <&bl_vddpos_5p5>;
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vddneg-supply = <&bl_vddneg_5p5>;
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enable-gpios = <&tlmm 139 GPIO_ACTIVE_HIGH>;
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current-num-sinks = <5>;
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kinetic,current-ramp-delay-ms = <128>;
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kinetic,led-enable-ramp-delay-ms = <1>;
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kinetic,enable-lcd-bias;
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};
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