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
17Example:
18
19	/* LP8555 */
20	backlight@2c {
21		compatible = "ti,lp8555";
22		reg = <0x2c>;
23
24		dev-ctrl = /bits/ 8 <0x00>;
25		pwm-period = <10000>;
26
27		/* 4V OV, 4 output LED0 string enabled */
28		rom_14h {
29			rom-addr = /bits/ 8 <0x14>;
30			rom-val = /bits/ 8 <0xcf>;
31		};
32
33		/* Heavy smoothing, 24ms ramp time step */
34		rom_15h {
35			rom-addr = /bits/ 8 <0x15>;
36			rom-val = /bits/ 8 <0xc7>;
37		};
38
39		/* 4 output LED1 string enabled */
40		rom_19h {
41			rom-addr = /bits/ 8 <0x19>;
42			rom-val = /bits/ 8 <0x0f>;
43		};
44	};
45
46	/* LP8556 */
47	backlight@2c {
48		compatible = "ti,lp8556";
49		reg = <0x2c>;
50
51		bl-name = "lcd-bl";
52		dev-ctrl = /bits/ 8 <0x85>;
53		init-brt = /bits/ 8 <0x10>;
54	};
55
56	/* LP8557 */
57	backlight@2c {
58		compatible = "ti,lp8557";
59		reg = <0x2c>;
60		power-supply = <&backlight_vdd>;
61
62		dev-ctrl = /bits/ 8 <0x41>;
63		init-brt = /bits/ 8 <0x0a>;
64
65		/* 4V OV, 4 output LED string enabled */
66		rom_14h {
67			rom-addr = /bits/ 8 <0x14>;
68			rom-val = /bits/ 8 <0xcf>;
69		};
70	};
71