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