tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/leds/backlight/kinetic,ktz8866.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Kinetic Technologies KTZ8866 backlight
8
9maintainers:
10 - Jianhua Lu <lujianhua000@gmail.com>
11
12description: |
13 The Kinetic Technologies KTZ8866 is a high efficiency 6-channels-current-sinks
14 led backlight with dual lcd bias power.
15 https://www.kinet-ic.com/ktz8866/
16
17allOf:
18 - $ref: common.yaml#
19
20properties:
21 compatible:
22 const: kinetic,ktz8866
23
24 vddpos-supply:
25 description: positive boost supply regulator.
26
27 vddneg-supply:
28 description: negative boost supply regulator.
29
30 enable-gpios:
31 description: GPIO to use to enable/disable the backlight (HWEN pin).
32 maxItems: 1
33
34 current-num-sinks:
35 description: number of the LED current sinks' channels.
36 enum: [1, 2, 3, 4, 5, 6]
37
38 kinetic,current-ramp-delay-ms:
39 description: |
40 LED current ramping delay time in milliseconds, note that the
41 case 1 will be mapped to 1μs.
42 enum: [1, 2, 4, 8, 16, 32, 64, 128, 192, 256, 320, 384, 448, 512, 576, 640]
43
44 kinetic,led-enable-ramp-delay-ms:
45 description: |
46 LED on/off ramping delay time in milliseconds, note that the case 0 will be
47 mapped to 512μs because ktz8866 can't ramp faster than it.
48 enum: [0, 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384]
49
50 kinetic,enable-lcd-bias:
51 description: Set if we want to output bias power supply for LCD.
52 type: boolean
53
54required:
55 - compatible
56 - vddpos-supply
57 - vddneg-supply
58 - enable-gpios
59
60unevaluatedProperties: false
61
62examples:
63 - |
64 #include <dt-bindings/gpio/gpio.h>
65
66 backlight {
67 compatible = "kinetic,ktz8866";
68
69 vddpos-supply = <&bl_vddpos_5p5>;
70 vddneg-supply = <&bl_vddneg_5p5>;
71 enable-gpios = <&tlmm 139 GPIO_ACTIVE_HIGH>;
72 current-num-sinks = <5>;
73 kinetic,current-ramp-delay-ms = <128>;
74 kinetic,led-enable-ramp-delay-ms = <1>;
75 kinetic,enable-lcd-bias;
76 };