[PATCH v4 2/3] leds: ktd2692: add device tree bindings for ktd2692

[Ingi Kim]

This patch adds the device tree bindings for ktd2692 flash LEDs.
Add optional properties 'flash-timeout-us' to control flash timeout
and 'vin-supply' for flash-led regulator

Signed-off-by: Ingi Kim <ingi2.kim@xxxxxxxxxxx>
---
 .../devicetree/bindings/leds/leds-ktd2692.txt      | 33 ++++++++++++++++++++++
 1 file changed, 33 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..f78512f
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/leds-ktd2692.txt
@@ -0,0 +1,33 @@
+* 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, aux-gpio : gpio pins in order control ktd2692 flash led.
+		There is an internal 300kOhm pull-down resistor at each pin
+	- vin-supply : "vin" LED supply (2.7V to 5.5V)
+		See Documentation/devicetree/bindings/regulator/regulator.txt
+
+Optional property:
+	- flash-timeout-us : Maximum flash timeout in microseconds.
+			flash timeout ranges from 0 to 1835000us and
+			default is 1049000us.
+
+Example:
+
+flash-led {
+	compatible = "kinetic,ktd2692";
+	ctrl-gpio = <&gpc0 1 0>;
+	aux-gpio = <&gpc0 2 0>;
+	flash-timeout-us = <1835000>;
+	vin-supply = <&vbat>;
+};
-- 
2.0.5

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