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 "mediatek,mt6323-led" 16- address-cells : Must be 1 17- size-cells : Must be 0 18 19Each led is represented as a child node of the mediatek,mt6323-led that 20describes the initial behavior for each LED physically and currently only four 21LED child nodes can be supported. 22 23Required properties for the LED child node: 24- reg : LED channel number (0..3) 25 26Optional properties for the LED child node: 27- label : See Documentation/devicetree/bindings/leds/common.txt 28- linux,default-trigger : See Documentation/devicetree/bindings/leds/common.txt 29- default-state: See Documentation/devicetree/bindings/leds/common.txt 30 31Example: 32 33 mt6323: pmic { 34 compatible = "mediatek,mt6323"; 35 36 ... 37 38 mt6323led: leds { 39 compatible = "mediatek,mt6323-led"; 40 #address-cells = <1>; 41 #size-cells = <0>; 42 43 led@0 { 44 reg = <0>; 45 label = "LED0"; 46 linux,default-trigger = "timer"; 47 default-state = "on"; 48 }; 49 led@1 { 50 reg = <1>; 51 label = "LED1"; 52 default-state = "off"; 53 }; 54 led@2 { 55 reg = <2>; 56 label = "LED2"; 57 default-state = "on"; 58 }; 59 }; 60 }; 61