1LEDs connected to is31fl319x LED controller chip 2 3Required properties: 4- compatible : Should be any of 5 "issi,is31fl3190" 6 "issi,is31fl3191" 7 "issi,is31fl3193" 8 "issi,is31fl3196" 9 "issi,is31fl3199" 10 "si-en,sn3199". 11- #address-cells: Must be 1. 12- #size-cells: Must be 0. 13- reg: 0x64, 0x65, 0x66, or 0x67. 14 15Optional properties: 16- audio-gain-db : audio gain selection for external analog modulation input. 17 Valid values: 0 - 21, step by 3 (rounded down) 18 Default: 0 19 20Each led is represented as a sub-node of the issi,is31fl319x device. 21There can be less leds subnodes than the chip can support but not more. 22 23Required led sub-node properties: 24- reg : number of LED line 25 Valid values: 1 - number of leds supported by the chip variant. 26 27Optional led sub-node properties: 28- label : see Documentation/devicetree/bindings/leds/common.txt. 29- linux,default-trigger : 30 see Documentation/devicetree/bindings/leds/common.txt. 31- led-max-microamp : (optional) 32 Valid values: 5000 - 40000, step by 5000 (rounded down) 33 Default: 20000 (20 mA) 34 Note: a driver will take the lowest of all led limits since the 35 chip has a single global setting. The lowest value will be chosen 36 due to the PWM specificity, where lower brightness is achieved 37 by reducing the dury-cycle of pulses and not the current, which 38 will always have its peak value equal to led-max-microamp. 39 40Examples: 41 42fancy_leds: leds@65 { 43 compatible = "issi,is31fl3196"; 44 #address-cells = <1>; 45 #size-cells = <0>; 46 reg = <0x65>; 47 48 red_aux: led@1 { 49 label = "red:aux"; 50 reg = <1>; 51 led-max-microamp = <10000>; 52 }; 53 54 green_power: led@5 { 55 label = "green:power"; 56 reg = <5>; 57 linux,default-trigger = "default-on"; 58 }; 59}; 60