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# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/leds/backlight/kinetic,ktz8866.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Kinetic Technologies KTZ8866 backlight
maintainers:
- Jianhua Lu <lujianhua000@gmail.com>
description: |
The Kinetic Technologies KTZ8866 is a high efficiency 6-channels-current-sinks
led backlight with dual lcd bias power.
https://www.kinet-ic.com/ktz8866/
allOf:
- $ref: common.yaml#
properties:
compatible:
const: kinetic,ktz8866
reg:
maxItems: 1
vddpos-supply:
description: positive boost supply regulator.
vddneg-supply:
description: negative boost supply regulator.
enable-gpios:
description: GPIO to use to enable/disable the backlight (HWEN pin).
maxItems: 1
current-num-sinks:
description: number of the LED current sinks' channels.
$ref: /schemas/types.yaml#/definitions/uint32
enum: [1, 2, 3, 4, 5, 6]
kinetic,current-ramp-delay-ms:
description: |
LED current ramping delay time in milliseconds, note that the
case 1 will be mapped to 1μs.
enum: [1, 2, 4, 8, 16, 32, 64, 128, 192, 256, 320, 384, 448, 512, 576, 640]
kinetic,led-enable-ramp-delay-ms:
description: |
LED on/off ramping delay time in milliseconds, note that the case 0 will be
mapped to 512μs because ktz8866 can't ramp faster than it.
enum: [0, 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384]
kinetic,enable-lcd-bias:
description: Set if we want to output bias power supply for LCD.
type: boolean
required:
- compatible
- reg
- vddpos-supply
- vddneg-supply
- enable-gpios
unevaluatedProperties: false
examples:
- |
#include <dt-bindings/gpio/gpio.h>
i2c {
#address-cells = <1>;
#size-cells = <0>;
backlight@11 {
compatible = "kinetic,ktz8866";
reg = <0x11>;
vddpos-supply = <&bl_vddpos_5p5>;
vddneg-supply = <&bl_vddneg_5p5>;
enable-gpios = <&tlmm 139 GPIO_ACTIVE_HIGH>;
current-num-sinks = <5>;
kinetic,current-ramp-delay-ms = <128>;
kinetic,led-enable-ramp-delay-ms = <1>;
kinetic,enable-lcd-bias;
};
};
|
