DT: leds: Add binding for the ISSI IS31FL32xx family of LED controllers

This adds a binding description for the is31fl3236/35/18/16 I2C LED
controllers.

Signed-off-by: David Rivshin <drivshin@allworx.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>

diff --git a/Documentation/devicetree/bindings/leds/leds-is31fl32xx.txt b/Documentation/devicetree/bindings/leds/leds-is31fl32xx.txt
new file mode 100644 (file)
index 0000000..e72ed66
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+++ b/Documentation/devicetree/bindings/leds/leds-is31fl32xx.txt
@@ -0,0 +1,49 @@
+Binding for ISSI IS31FL32xx LED Drivers
+
+The IS31FL32xx family of LED drivers are I2C devices with multiple
+constant-current channels, each with independent 256-level PWM control.
+Each LED is represented as a sub-node of the device.
+
+Required properties:
+- compatible: one of
+       issi,is31fl3236
+       issi,is31fl3235
+       issi,is31fl3218
+       issi,is31fl3216
+- reg: I2C slave address
+- address-cells : must be 1
+- size-cells : must be 0
+
+LED sub-node properties:
+- reg : LED channel number (1..N)
+- label :  (optional)
+  see Documentation/devicetree/bindings/leds/common.txt
+- linux,default-trigger :  (optional)
+  see Documentation/devicetree/bindings/leds/common.txt
+
+
+Example:
+
+is31fl3236: led-controller@3c {
+       compatible = "issi,is31fl3236";
+       reg = <0x3c>;
+       #address-cells = <1>;
+       #size-cells = <0>;
+
+       led@1 {
+               reg = <1>;
+               label = "EB:blue:usr0";
+       };
+       led@2 {
+               reg = <2>;
+               label = "EB:blue:usr1";
+       };
+       ...
+       led@36 {
+               reg = <36>;
+               label = "EB:blue:usr35";
+       };
+};
+
+For more product information please see the link below:
+http://www.issi.com/US/product-analog-fxled-driver.shtml