mirror of
https://github.com/torvalds/linux.git
synced 2024-12-28 05:41:55 +00:00
84b5def48f
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@samsung.com> Acked-by: Seung-Woo Kim <sw0312.kim@samsung.com> Reviewed-by: Varka Bhadram <varkabhadram@gmail.com> Acked-by: Jacek Anaszewski <j.anaszewski@samsung.com> Signed-off-by: Bryan Wu <cooloney@gmail.com>
51 lines
1.7 KiB
Plaintext
51 lines
1.7 KiB
Plaintext
* 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 : Should be "kinetic,ktd2692".
|
|
- ctrl-gpios : Specifier of the GPIO connected to CTRL pin.
|
|
- aux-gpios : Specifier of the GPIO connected to 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-gpios = <&gpc0 1 0>;
|
|
aux-gpios = <&gpc0 2 0>;
|
|
vin-supply = <&vbat>;
|
|
|
|
flash-led {
|
|
label = "ktd2692-flash";
|
|
led-max-microamp = <300000>;
|
|
flash-max-microamp = <1500000>;
|
|
flash-max-timeout-us = <1835000>;
|
|
};
|
|
};
|