1lp855x bindings
2
3Required properties:
4  - compatible: "ti,lp8550", "ti,lp8551", "ti,lp8552", "ti,lp8553",
5                "ti,lp8555", "ti,lp8556", "ti,lp8557"
6  - reg: I2C slave address (u8)
7  - dev-ctrl: Value of DEVICE CONTROL register (u8). It depends on the device.
8
9Optional properties:
10  - bl-name: Backlight device name (string)
11  - init-brt: Initial value of backlight brightness (u8)
12  - pwm-period: PWM period value. Set only PWM input mode used (u32)
13  - rom-addr: Register address of ROM area to be updated (u8)
14  - rom-val: Register value to be updated (u8)
15  - power-supply: Regulator which controls the 3V rail
16  - enable-supply: Regulator which controls the EN/VDDIO input
17
18Example:
19
20	/* LP8555 */
21	backlight@2c {
22		compatible = "ti,lp8555";
23		reg = <0x2c>;
24
25		dev-ctrl = /bits/ 8 <0x00>;
26		pwm-period = <10000>;
27
28		/* 4V OV, 4 output LED0 string enabled */
29		rom_14h {
30			rom-addr = /bits/ 8 <0x14>;
31			rom-val = /bits/ 8 <0xcf>;
32		};
33
34		/* Heavy smoothing, 24ms ramp time step */
35		rom_15h {
36			rom-addr = /bits/ 8 <0x15>;
37			rom-val = /bits/ 8 <0xc7>;
38		};
39
40		/* 4 output LED1 string enabled */
41		rom_19h {
42			rom-addr = /bits/ 8 <0x19>;
43			rom-val = /bits/ 8 <0x0f>;
44		};
45	};
46
47	/* LP8556 */
48	backlight@2c {
49		compatible = "ti,lp8556";
50		reg = <0x2c>;
51
52		bl-name = "lcd-bl";
53		dev-ctrl = /bits/ 8 <0x85>;
54		init-brt = /bits/ 8 <0x10>;
55	};
56
57	/* LP8557 */
58	backlight@2c {
59		compatible = "ti,lp8557";
60		reg = <0x2c>;
61		enable-supply = <&backlight_vddio>;
62		power-supply = <&backlight_vdd>;
63
64		dev-ctrl = /bits/ 8 <0x41>;
65		init-brt = /bits/ 8 <0x0a>;
66
67		/* 4V OV, 4 output LED string enabled */
68		rom_14h {
69			rom-addr = /bits/ 8 <0x14>;
70			rom-val = /bits/ 8 <0xcf>;
71		};
72	};
73