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+lp855x bindings
+
+Required properties:
+ - compatible: "ti,lp8550", "ti,lp8551", "ti,lp8552", "ti,lp8553",
+ "ti,lp8555", "ti,lp8556", "ti,lp8557"
+ - reg: I2C slave address (u8)
+ - dev-ctrl: Value of DEVICE CONTROL register (u8). It depends on the device.
+
+Optional properties:
+ - bl-name: Backlight device name (string)
+ - init-brt: Initial value of backlight brightness (u8)
+ - pwm-period: PWM period value. Set only PWM input mode used (u32)
+ - rom-addr: Register address of ROM area to be updated (u8)
+ - rom-val: Register value to be updated (u8)
+ - power-supply: Regulator which controls the 3V rail
+ - enable-supply: Regulator which controls the EN/VDDIO input
+
+Example:
+
+ /* LP8555 */
+ backlight@2c {
+ compatible = "ti,lp8555";
+ reg = <0x2c>;
+
+ dev-ctrl = /bits/ 8 <0x00>;
+ pwm-period = <10000>;
+
+ /* 4V OV, 4 output LED0 string enabled */
+ rom_14h {
+ rom-addr = /bits/ 8 <0x14>;
+ rom-val = /bits/ 8 <0xcf>;
+ };
+
+ /* Heavy smoothing, 24ms ramp time step */
+ rom_15h {
+ rom-addr = /bits/ 8 <0x15>;
+ rom-val = /bits/ 8 <0xc7>;
+ };
+
+ /* 4 output LED1 string enabled */
+ rom_19h {
+ rom-addr = /bits/ 8 <0x19>;
+ rom-val = /bits/ 8 <0x0f>;
+ };
+ };
+
+ /* LP8556 */
+ backlight@2c {
+ compatible = "ti,lp8556";
+ reg = <0x2c>;
+
+ bl-name = "lcd-bl";
+ dev-ctrl = /bits/ 8 <0x85>;
+ init-brt = /bits/ 8 <0x10>;
+ };
+
+ /* LP8557 */
+ backlight@2c {
+ compatible = "ti,lp8557";
+ reg = <0x2c>;
+ enable-supply = <&backlight_vddio>;
+ power-supply = <&backlight_vdd>;
+
+ dev-ctrl = /bits/ 8 <0x41>;
+ init-brt = /bits/ 8 <0x0a>;
+
+ /* 4V OV, 4 output LED string enabled */
+ rom_14h {
+ rom-addr = /bits/ 8 <0x14>;
+ rom-val = /bits/ 8 <0xcf>;
+ };
+ };