1* Kinetic Technologies - KTD2692 Flash LED Driver 2 3KTD2692 is the ideal power solution for high-power flash LEDs. 4It uses ExpressWire single-wire programming for maximum flexibility. 5 6The ExpressWire interface through CTRL pin can control LED on/off and 7enable/disable the IC, Movie(max 1/3 of Flash current) / Flash mode current, 8Flash timeout, LVP(low voltage protection). 9 10Also, When the AUX pin is pulled high while CTRL pin is high, 11LED current will be ramped up to the flash-mode current level. 12 13Required properties: 14- compatible : Should be "kinetic,ktd2692". 15- ctrl-gpios : Specifier of the GPIO connected to CTRL pin. 16- aux-gpios : Specifier of the GPIO connected to AUX pin. 17 18Optional properties: 19- vin-supply : "vin" LED supply (2.7V to 5.5V). 20 See Documentation/devicetree/bindings/regulator/regulator.txt 21 22A discrete LED element connected to the device must be represented by a child 23node - See Documentation/devicetree/bindings/leds/common.txt 24 25Required properties for flash LED child nodes: 26 See Documentation/devicetree/bindings/leds/common.txt 27- led-max-microamp : Minimum Threshold for Timer protection 28 is defined internally (Maximum 300mA). 29- flash-max-microamp : Flash LED maximum current 30 Formula : I(mA) = 15000 / Rset. 31- flash-max-timeout-us : Flash LED maximum timeout. 32 33Optional properties for flash LED child nodes: 34- label : See Documentation/devicetree/bindings/leds/common.txt 35 36Example: 37 38ktd2692 { 39 compatible = "kinetic,ktd2692"; 40 ctrl-gpios = <&gpc0 1 0>; 41 aux-gpios = <&gpc0 2 0>; 42 vin-supply = <&vbat>; 43 44 flash-led { 45 label = "ktd2692-flash"; 46 led-max-microamp = <300000>; 47 flash-max-microamp = <1500000>; 48 flash-max-timeout-us = <1835000>; 49 }; 50}; 51