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50 lines
1.7 KiB
50 lines
1.7 KiB
* 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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