1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/leds/backlight/kinetic,ktd253.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Kinetic Technologies KTD253 and KTD259 one-wire backlight
8
9 maintainers:
10 - Linus Walleij <linus.walleij@linaro.org>
11
12 description: |
13 The Kinetic Technologies KTD253 and KTD259 are white LED backlights
14 controlled by a single GPIO line. If you just turn on the backlight
15 it goes to maximum backlight then you can set the level of backlight
16 using pulses on the enable wire. This is sometimes referred to as
17 "expresswire".
18
19 allOf:
20 - $ref: common.yaml#
21
22 properties:
23 compatible:
24 items:
25 - enum:
26 - kinetic,ktd253
27 - kinetic,ktd259
28
29 enable-gpios:
30 description: GPIO to use to enable/disable and dim the backlight.
31 maxItems: 1
32
33 default-brightness: true
34 max-brightness: true
35
36 required:
37 - compatible
38 - enable-gpios
39
40 additionalProperties: false
41
42 examples:
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 };
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