0001 Device Tree Bindings for LED support on MT6323 PMIC
0002
0003 MT6323 LED controller is subfunction provided by MT6323 PMIC, so the LED
0004 controllers are defined as the subnode of the function node provided by MT6323
0005 PMIC controller that is being defined as one kind of Muti-Function Device (MFD)
0006 using shared bus called PMIC wrapper for each subfunction to access remote
0007 MT6323 PMIC hardware.
0008
0009 For MT6323 MFD bindings see:
0010 Documentation/devicetree/bindings/mfd/mt6397.txt
0011 For MediaTek PMIC wrapper bindings see:
0012 Documentation/devicetree/bindings/soc/mediatek/pwrap.txt
0013
0014 Required properties:
0015 - compatible : Must be "mediatek,mt6323-led"
0016 - address-cells : Must be 1
0017 - size-cells : Must be 0
0018
0019 Each led is represented as a child node of the mediatek,mt6323-led that
0020 describes the initial behavior for each LED physically and currently only four
0021 LED child nodes can be supported.
0022
0023 Required properties for the LED child node:
0024 - reg : LED channel number (0..3)
0025
0026 Optional properties for the LED child node:
0027 - label : See Documentation/devicetree/bindings/leds/common.txt
0028 - linux,default-trigger : See Documentation/devicetree/bindings/leds/common.txt
0029 - default-state: See Documentation/devicetree/bindings/leds/common.txt
0030
0031 Example:
0032
0033 mt6323: pmic {
0034 compatible = "mediatek,mt6323";
0035
0036 ...
0037
0038 mt6323led: leds {
0039 compatible = "mediatek,mt6323-led";
0040 #address-cells = <1>;
0041 #size-cells = <0>;
0042
0043 led@0 {
0044 reg = <0>;
0045 label = "LED0";
0046 linux,default-trigger = "timer";
0047 default-state = "on";
0048 };
0049 led@1 {
0050 reg = <1>;
0051 label = "LED1";
0052 default-state = "off";
0053 };
0054 led@2 {
0055 reg = <2>;
0056 label = "LED2";
0057 default-state = "on";
0058 };
0059 };
0060 };
