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1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)2%YAML 1.23---4$id: http://devicetree.org/schemas/leds/backlight/kinetic,ktd253.yaml#5$schema: http://devicetree.org/meta-schemas/core.yaml#6 7title: Kinetic Technologies KTD253 and KTD259 one-wire backlight8 9maintainers:10 - Linus Walleij <linus.walleij@linaro.org>11 12description: |13 The Kinetic Technologies KTD253 and KTD259 are white LED backlights14 controlled by a single GPIO line. If you just turn on the backlight15 it goes to maximum backlight then you can set the level of backlight16 using pulses on the enable wire. This is sometimes referred to as17 "expresswire".18 19allOf:20 - $ref: common.yaml#21 22properties:23 compatible:24 items:25 - enum:26 - kinetic,ktd25327 - kinetic,ktd25928 29 enable-gpios:30 description: GPIO to use to enable/disable and dim the backlight.31 maxItems: 132 33 default-brightness: true34 max-brightness: true35 36required:37 - compatible38 - enable-gpios39 40additionalProperties: false41 42examples:43 - |44 #include <dt-bindings/gpio/gpio.h>45 backlight {46 compatible = "kinetic,ktd253";47 enable-gpios = <&gpio2 5 GPIO_ACTIVE_HIGH>;48 default-brightness = <13>;49 };50