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1Device Tree Bindings for LED support on MT6323 PMIC2 3MT6323 LED controller is subfunction provided by MT6323 PMIC, so the LED4controllers are defined as the subnode of the function node provided by MT63235PMIC controller that is being defined as one kind of Muti-Function Device (MFD)6using shared bus called PMIC wrapper for each subfunction to access remote7MT6323 PMIC hardware.8 9For MT6323 MFD bindings see:10Documentation/devicetree/bindings/mfd/mt6397.txt11For MediaTek PMIC wrapper bindings see:12Documentation/devicetree/bindings/soc/mediatek/mediatek,pwrap.yaml13 14Required properties:15- compatible : Must be one of16 - "mediatek,mt6323-led"17 - "mediatek,mt6331-led"18 - "mediatek,mt6332-led"19- address-cells : Must be 120- size-cells : Must be 021 22Each led is represented as a child node of the mediatek,mt6323-led that23describes the initial behavior for each LED physically and currently only four24LED 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.txt31- linux,default-trigger : See Documentation/devicetree/bindings/leds/common.txt32- default-state: See Documentation/devicetree/bindings/leds/common.txt33 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