This patch adds the device tree bindings for ktd2692 flash LEDs. Add Optional properties of child node for Flash LED Signed-off-by: Ingi Kim <ingi2.kim@xxxxxxxxxxx> Acked-by: Seung-Woo Kim <sw0312.kim@xxxxxxxxxxx> Reviewed-by: Varka Bhadram <varkabhadram@xxxxxxxxx> --- .../devicetree/bindings/leds/leds-ktd2692.txt | 50 ++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 Documentation/devicetree/bindings/leds/leds-ktd2692.txt diff --git a/Documentation/devicetree/bindings/leds/leds-ktd2692.txt b/Documentation/devicetree/bindings/leds/leds-ktd2692.txt new file mode 100644 index 0000000..cf45492 --- /dev/null +++ b/Documentation/devicetree/bindings/leds/leds-ktd2692.txt @@ -0,0 +1,50 @@ +* Kinetic Technologies - KTD2692 Flash LED Driver + +KTD2692 is the ideal power solution for high-power flash LEDs. +It uses ExpressWire single-wire programming for maximum flexibility. + +The ExpressWire interface through CTRL pin can control LED on/off and +enable/disable the IC, Movie(max 1/3 of Flash current) / Flash mode current, +Flash timeout, LVP(low voltage protection). + +Also, When the AUX pin is pulled high while CTRL pin is high, +LED current will be ramped up to the flash-mode current level. + +Required properties: +- compatible: "kinetic,ktd2692" +- ctrl-gpio : gpio pin in order control CTRL pin +- aux-gpio : gpio pin in order control AUX pin + +Optional properties: +- vin-supply : "vin" LED supply (2.7V to 5.5V) + See Documentation/devicetree/bindings/regulator/regulator.txt + +A discrete LED element connected to the device must be represented by a child +node - see Documentation/devicetree/bindings/leds/common.txt. + +Required properties for flash LED child nodes: + See Documentation/devicetree/bindings/leds/common.txt +- led-max-microamp : Minimum Threshold for Timer protection + is defined internally (Maximum 300mA) +- flash-max-microamp : Flash LED maximum current + Formula : I(mA) = 15000 / Rset +- flash-max-timeout-us : Flash LED maximum timeout + +Optional properties for flash LED child nodes: +- label : see Documentation/devicetree/bindings/leds/common.txt + +Example: + +ktd2692 { + compatible = "kinetic,ktd2692"; + ctrl-gpio = <&gpc0 1 0>; + aux-gpio = <&gpc0 2 0>; + vin-supply = <&vbat>; + + flash-led { + label = "ktd2692-flash"; + led-max-microamp = <300000>; + flash-max-microamp = <1500000>; + flash-max-timeout-us = <1835000>; + }; +}; -- 2.0.5 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html