[PATCH v6 2/3] leds: ktd2692: add device tree bindings for ktd2692

[Ingi Kim <ingi2.kim@samsung.com>]

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>
---
 .../devicetree/bindings/leds/leds-ktd2692.txt      | 40 ++++++++++++++++++++++
 1 file changed, 40 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..68bb59e
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/leds-ktd2692.txt
@@ -0,0 +1,40 @@
+* 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
+- 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.
+
+Optional properties of flash LED child node:
+- label : see Documentation/devicetree/bindings/leds/common.txt
+- flash-timeout-us : Maximum flash timeout in microseconds.
+  flash timeout ranges from 0 to 1835000us and default is 1049000us.
+
+Example:
+
+ktd2692 {
+	compatible = "kinetic,ktd2692";
+	ctrl-gpio = <&gpc0 1 0>;
+	aux-gpio = <&gpc0 2 0>;
+	vin-supply = <&vbat>;
+
+	flash-led {
+		label = "ktd2692-flash";
+		flash-timeout-us = <1835000>;
+	};
+};
-- 
2.0.5