dt-bindings: mfd: Add lm36274 bindings to ti-lmu

Add the LM36274 backlight driver with regulator support.
This is a multi-function device for backlight applications.

Backlight properties will be documented in it's a supplemental
bindings document.

Regulator support is documented in the regulator/lm363x-regulator.txt

http://www.ti.com/lit/ds/symlink/lm36274.pdf

Signed-off-by: Dan Murphy <[e-mail]>
Reviewed-by: Rob Herring <[e-mail]>
Acked-by: Lee Jones <[e-mail]>
Acked-by: Pavel Machek <[e-mail]>
Signed-off-by: Jacek Anaszewski <[e-mail]>

Documentation/devicetree/bindings/mfd/ti-lmu.txt

···
   LM3632       Backlight and regulator
   LM3633       Backlight, LED and fault monitor
   LM3695       Backlight
+  LM36274      Backlight and regulator
 
 Required properties:
   - compatible: Should be one of:
···
                 "ti,lm3632"
                 "ti,lm3633"
                 "ti,lm3695"
+		"ti,lm36274"
   - reg: I2C slave address.
          0x11 for LM3632
          0x29 for LM3631
          0x36 for LM3633
          0x63 for LM3695
+         0x11 for LM36274
 
 Optional properties:
   - enable-gpios: A GPIO specifier for hardware enable pin.
···
       - compatible: Should be one of:
                     "ti,lm3633-fault-monitor"
   - leds: LED properties for LM3633. Please refer to [2].
+	  LED properties for LM36274. Please refer to [4].
   - regulators: Regulator properties for LM3631 and LM3632.
                 Please refer to [3].
 
 [1] ../leds/backlight/ti-lmu-backlight.txt
 [2] ../leds/leds-lm3633.txt
 [3] ../regulator/lm363x-regulator.txt
+[4] ../leds/leds-lm36274.txt
 
 lm3631@29 {
 	compatible = "ti,lm3631";
···
 		lcd {
 			label = "bl";
 			led-sources = <0 1>;
+		};
+	};
+};
+
+lm36274@11 {
+	compatible = "ti,lm36274";
+	#address-cells = <1>;
+	#size-cells = <0>;
+	reg = <0x11>;
+
+	enable-gpios = <&pioC 2 GPIO_ACTIVE_HIGH>;
+	regulators {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		compatible = "ti,lm363x-regulator";
+
+		enable-gpios = <&pioC 0 GPIO_ACTIVE_HIGH>,
+			       <&pioC 1 GPIO_ACTIVE_HIGH>;
+
+		vboost {
+			regulator-name = "lcd_boost";
+			regulator-min-microvolt = <4000000>;
+			regulator-max-microvolt = <7150000>;
+			regulator-always-on;
+		};
+
+		vpos {
+			regulator-name = "lcd_vpos";
+			regulator-min-microvolt = <4000000>;
+			regulator-max-microvolt = <6500000>;
+		};
+
+		vneg {
+			regulator-name = "lcd_vneg";
+			regulator-min-microvolt = <4000000>;
+			regulator-max-microvolt = <6500000>;
+		};
+	};
+
+	backlight {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		compatible = "ti,lm36274-backlight";
+
+		led@0 {
+			reg = <0>;
+			led-sources = <0 2>;
+			label = "white:backlight_cluster";
+			linux,default-trigger = "backlight";
 		};
 	};
 };