1Device Tree Bindings for LED support on MT6323 PMIC
2
3MT6323 LED controller is subfunction provided by MT6323 PMIC, so the LED
4controllers are defined as the subnode of the function node provided by MT6323
5PMIC controller that is being defined as one kind of Muti-Function Device (MFD)
6using shared bus called PMIC wrapper for each subfunction to access remote
7MT6323 PMIC hardware.
8
9For MT6323 MFD bindings see:
10Documentation/devicetree/bindings/mfd/mt6397.txt
11For MediaTek PMIC wrapper bindings see:
12Documentation/devicetree/bindings/soc/mediatek/mediatek,pwrap.yaml
13
14Required properties:
15- compatible : Must be one of
16  - "mediatek,mt6323-led"
17  - "mediatek,mt6331-led"
18  - "mediatek,mt6332-led"
19- address-cells : Must be 1
20- size-cells : Must be 0
21
22Each led is represented as a child node of the mediatek,mt6323-led that
23describes the initial behavior for each LED physically and currently only four
24LED child nodes can be supported.
25
26Required properties for the LED child node:
27- reg : LED channel number (0..3)
28
29Optional properties for the LED child node:
30- label : See Documentation/devicetree/bindings/leds/common.txt
31- linux,default-trigger : See Documentation/devicetree/bindings/leds/common.txt
32- default-state: See Documentation/devicetree/bindings/leds/common.txt
33
34Example:
35
36	mt6323: pmic {
37		compatible = "mediatek,mt6323";
38
39		...
40
41		mt6323led: leds {
42			compatible = "mediatek,mt6323-led";
43			#address-cells = <1>;
44			#size-cells = <0>;
45
46			led@0 {
47				reg = <0>;
48				label = "LED0";
49				linux,default-trigger = "timer";
50				default-state = "on";
51			};
52			led@1 {
53				reg = <1>;
54				label = "LED1";
55				default-state = "off";
56			};
57			led@2 {
58				reg = <2>;
59				label = "LED2";
60				default-state = "on";
61			};
62		};
63	};
64