forked from Minki/linux
51 lines
1.7 KiB
Plaintext
51 lines
1.7 KiB
Plaintext
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* Kinetic Technologies - KTD2692 Flash LED Driver
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KTD2692 is the ideal power solution for high-power flash LEDs.
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It uses ExpressWire single-wire programming for maximum flexibility.
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The ExpressWire interface through CTRL pin can control LED on/off and
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enable/disable the IC, Movie(max 1/3 of Flash current) / Flash mode current,
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Flash timeout, LVP(low voltage protection).
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Also, When the AUX pin is pulled high while CTRL pin is high,
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LED current will be ramped up to the flash-mode current level.
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Required properties:
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- compatible : Should be "kinetic,ktd2692".
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- ctrl-gpios : Specifier of the GPIO connected to CTRL pin.
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- aux-gpios : Specifier of the GPIO connected to AUX pin.
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Optional properties:
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- vin-supply : "vin" LED supply (2.7V to 5.5V).
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See Documentation/devicetree/bindings/regulator/regulator.txt
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A discrete LED element connected to the device must be represented by a child
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node - See Documentation/devicetree/bindings/leds/common.txt
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Required properties for flash LED child nodes:
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See Documentation/devicetree/bindings/leds/common.txt
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- led-max-microamp : Minimum Threshold for Timer protection
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is defined internally (Maximum 300mA).
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- flash-max-microamp : Flash LED maximum current
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Formula : I(mA) = 15000 / Rset.
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- flash-max-timeout-us : Flash LED maximum timeout.
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Optional properties for flash LED child nodes:
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- label : See Documentation/devicetree/bindings/leds/common.txt
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Example:
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ktd2692 {
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compatible = "kinetic,ktd2692";
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ctrl-gpios = <&gpc0 1 0>;
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aux-gpios = <&gpc0 2 0>;
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vin-supply = <&vbat>;
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flash-led {
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label = "ktd2692-flash";
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led-max-microamp = <300000>;
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flash-max-microamp = <1500000>;
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flash-max-timeout-us = <1835000>;
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};
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};
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