dt-bindings: leds-gpio: Add function and color properties

Refer to new "function" and "color" properties and mark "label"
as deprecated.
Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/leds/leds-gpio.txt

@@ -10,8 +10,12 @@ LED sub-node properties:
 - gpios :  Should specify the LED's GPIO, see "gpios property" in
   Documentation/devicetree/bindings/gpio/gpio.txt.  Active low LEDs should be
   indicated using flags in the GPIO specifier.
-- label :  (optional)
+- function :  (optional)
+  see Documentation/devicetree/bindings/leds/common.txt
+- color :  (optional)
   see Documentation/devicetree/bindings/leds/common.txt
+- label :  (optional)
+  see Documentation/devicetree/bindings/leds/common.txt (deprecated)
 - linux,default-trigger :  (optional)
   see Documentation/devicetree/bindings/leds/common.txt
 - default-state:  (optional) The initial state of the LED.
@@ -27,30 +31,34 @@ LED sub-node properties:
 Examples:
 
 #include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/leds/common.h>
 
 leds {
 	compatible = "gpio-leds";
-	hdd {
-		label = "Disk Activity";
+	led0 {
 		gpios = <&mcu_pio 0 GPIO_ACTIVE_LOW>;
 		linux,default-trigger = "disk-activity";
+		function = LED_FUNCTION_DISK;
 	};
 
-	fault {
+	led1 {
 		gpios = <&mcu_pio 1 GPIO_ACTIVE_HIGH>;
 		/* Keep LED on if BIOS detected hardware fault */
 		default-state = "keep";
+		function = LED_FUNCTION_FAULT;
 	};
 };
 
 run-control {
 	compatible = "gpio-leds";
-	red {
+	led0 {
 		gpios = <&mpc8572 6 GPIO_ACTIVE_HIGH>;
+		color = <LED_COLOR_ID_RED>;
 		default-state = "off";
 	};
-	green {
+	led1 {
 		gpios = <&mpc8572 7 GPIO_ACTIVE_HIGH>;
+		color = <LED_COLOR_ID_GREEN>;
 		default-state = "on";
 	};
 };
@@ -58,9 +66,10 @@ run-control {
 leds {
 	compatible = "gpio-leds";
 
-	charger-led {
+	led0 {
 		gpios = <&gpio1 2 GPIO_ACTIVE_HIGH>;
 		linux,default-trigger = "max8903-charger-charging";
 		retain-state-suspended;
+		function = LED_FUNCTION_CHARGE;
 	};
 };