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- shutdown-gpios : Specifier of the GPIO connected to SDB pin of the chip. 20 21Each led is represented as a sub-node of the issi,is31fl319x device. 22There can be less leds subnodes than the chip can support but not more. 23 24Required led sub-node properties: 25- reg : number of LED line 26 Valid values: 1 - number of leds supported by the chip variant. 27 28Optional led sub-node properties: 29- label : see Documentation/devicetree/bindings/leds/common.txt. 30- linux,default-trigger : 31 see Documentation/devicetree/bindings/leds/common.txt. 32- led-max-microamp : (optional) 33 Valid values: 5000 - 40000, step by 5000 (rounded down) 34 Default: 20000 (20 mA) 35 Note: a driver will take the lowest of all led limits since the 36 chip has a single global setting. The lowest value will be chosen 37 due to the PWM specificity, where lower brightness is achieved 38 by reducing the dury-cycle of pulses and not the current, which 39 will always have its peak value equal to led-max-microamp. 40 41Examples: 42 43fancy_leds: leds@65 { 44 compatible = "issi,is31fl3196"; 45 #address-cells = <1>; 46 #size-cells = <0>; 47 reg = <0x65>; 48 shutdown-gpios = <&gpio0 11 GPIO_ACTIVE_HIGH>; 49 50 red_aux: led@1 { 51 label = "red:aux"; 52 reg = <1>; 53 led-max-microamp = <10000>; 54 }; 55 56 green_power: led@5 { 57 label = "green:power"; 58 reg = <5>; 59 linux,default-trigger = "default-on"; 60 }; 61}; 62