1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/leds/ti.lm36922.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Texas Instruments - LM3692x Highly Efficient White LED Driver
8
9 maintainers:
10 - Dan Murphy <dmurphy@ti.com>
11
12 description: |
13 The LM3692x is an ultra-compact, highly efficient,
14 white-LED driver designed for LCD display backlighting.
15
16 The main difference between the LM36922 and LM36923 is the number of
17 LED strings it supports. The LM36922 supports two strings while the LM36923
18 supports three strings.
19
20 For more product information please see the link below:
21 https://www.ti.com/lit/ds/snvsa29/snvsa29.pdf
22
23 properties:
24 compatible:
25 enum:
26 - ti,lm36922
27 - ti,lm36923
28
29 reg:
30 maxItems: 1
31
32 "#address-cells":
33 const: 1
34
35 "#size-cells":
36 const: 0
37
38 enable-gpios:
39 description: gpio pin to enable/disable the device.
40
41 vled-supply:
42 description: LED supply
43
44 ti,ovp-microvolt:
45 description: Overvoltage protection.
46 default: 29000000
47 enum: [17000000, 21000000, 25000000, 29000000]
48
49 patternProperties:
50 '^led@[0-3]$':
51 type: object
52 $ref: common.yaml
53 properties:
54 reg:
55 enum: [0, 1, 2, 3]
56 description: |
57 0 - Will enable all LED sync paths
58 1 - Will enable the LED1 sync
59 2 - Will enable the LED2 sync
60 3 - Will enable the LED3 sync (LM36923 only)
61
62 unevaluatedProperties: false
63
64 required:
65 - compatible
66 - reg
67 - "#address-cells"
68 - "#size-cells"
69
70 allOf:
71 - if:
72 properties:
73 compatible:
74 contains:
75 const: ti,lm36922
76 then:
77 properties:
78 led@3: false
79
80 additionalProperties: false
81
82 examples:
83 - |
84 #include <dt-bindings/gpio/gpio.h>
85 #include <dt-bindings/leds/common.h>
86
87 i2c {
88 #address-cells = <1>;
89 #size-cells = <0>;
90
91 led-controller@36 {
92 compatible = "ti,lm36922";
93 reg = <0x36>;
94 #address-cells = <1>;
95 #size-cells = <0>;
96
97 enable-gpios = <&gpio1 28 GPIO_ACTIVE_HIGH>;
98 vled-supply = <&vbatt>;
99 ti,ovp-microvolt = <29000000>;
100
101 led@0 {
102 reg = <0>;
103 function = LED_FUNCTION_BACKLIGHT;
104 color = <LED_COLOR_ID_WHITE>;
105 linux,default-trigger = "backlight";
106 led-max-microamp = <20000>;
107 };
108 };
109 };
110
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