dt-bindings: backlight: Add Kinetic KTD2801 binding

KTD2801 is a LED backlight driver IC found in samsung,coreprimevelte.
The brightness can be set using PWM or the ExpressWire protocol. Add
a DT binding for the KTD2801.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Duje Mihanović <duje.mihanovic@skole.hr>
Link: https://lore.kernel.org/r/20240125-ktd2801-v5-3-e22da232a825@skole.hr
Signed-off-by: Lee Jones <lee@kernel.org>
This commit is contained in:
Duje Mihanović 2024-01-25 16:30:55 +01:00 committed by Lee Jones
parent b5a8c50e5c
commit 922235a9b8

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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,ktd2801.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Kinetic Technologies KTD2801 one-wire backlight
maintainers:
- Duje Mihanović <duje.mihanovic@skole.hr>
description: |
The Kinetic Technologies KTD2801 is a LED backlight driver controlled
by a single GPIO line. The driver can be controlled with a PWM signal
or by pulsing the GPIO line to set the backlight level. This is called
"ExpressWire".
allOf:
- $ref: common.yaml#
properties:
compatible:
const: kinetic,ktd2801
ctrl-gpios:
maxItems: 1
default-brightness: true
max-brightness: true
required:
- compatible
- ctrl-gpios
additionalProperties: false
examples:
- |
#include <dt-bindings/gpio/gpio.h>
backlight {
compatible = "kinetic,ktd2801";
ctrl-gpios = <&gpio 97 GPIO_ACTIVE_HIGH>;
max-brightness = <210>;
default-brightness = <100>;
};