leds-ktd2692.txt

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    1 * Kinetic Technologies - KTD2692 Flash LED Driver
    2 
    3 KTD2692 is the ideal power solution for high-power flash LEDs.
    4 It uses ExpressWire single-wire programming for maximum flexibility.
    5 
    6 The ExpressWire interface through CTRL pin can control LED on/off and
    7 enable/disable the IC, Movie(max 1/3 of Flash current) / Flash mode current,
    8 Flash timeout, LVP(low voltage protection).
    9 
   10 Also, When the AUX pin is pulled high while CTRL pin is high,
   11 LED current will be ramped up to the flash-mode current level.
   12 
   13 Required 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 
   18 Optional properties:
   19 - vin-supply : "vin" LED supply (2.7V to 5.5V).
   20   See Documentation/devicetree/bindings/regulator/regulator.txt
   21 
   22 A discrete LED element connected to the device must be represented by a child
   23 node - See Documentation/devicetree/bindings/leds/common.txt
   24 
   25 Required 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 
   33 Optional properties for flash LED child nodes:
   34 - label : See Documentation/devicetree/bindings/leds/common.txt
   35 
   36 Example:
   37 
   38 ktd2692 {
   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 };

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/leds/leds-ktd2692.txt

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sys/contrib/device-tree/Bindings/leds/leds-ktd2692.txt