0001 lp855x bindings
0002
0003 Required properties:
0004 - compatible: "ti,lp8550", "ti,lp8551", "ti,lp8552", "ti,lp8553",
0005 "ti,lp8555", "ti,lp8556", "ti,lp8557"
0006 - reg: I2C slave address (u8)
0007 - dev-ctrl: Value of DEVICE CONTROL register (u8). It depends on the device.
0008
0009 Optional properties:
0010 - bl-name: Backlight device name (string)
0011 - init-brt: Initial value of backlight brightness (u8)
0012 - pwm-period: PWM period value. Set only PWM input mode used (u32)
0013 - rom-addr: Register address of ROM area to be updated (u8)
0014 - rom-val: Register value to be updated (u8)
0015 - power-supply: Regulator which controls the 3V rail
0016 - enable-supply: Regulator which controls the EN/VDDIO input
0017
0018 Example:
0019
0020 /* LP8555 */
0021 backlight@2c {
0022 compatible = "ti,lp8555";
0023 reg = <0x2c>;
0024
0025 dev-ctrl = /bits/ 8 <0x00>;
0026 pwm-period = <10000>;
0027
0028 /* 4V OV, 4 output LED0 string enabled */
0029 rom_14h {
0030 rom-addr = /bits/ 8 <0x14>;
0031 rom-val = /bits/ 8 <0xcf>;
0032 };
0033
0034 /* Heavy smoothing, 24ms ramp time step */
0035 rom_15h {
0036 rom-addr = /bits/ 8 <0x15>;
0037 rom-val = /bits/ 8 <0xc7>;
0038 };
0039
0040 /* 4 output LED1 string enabled */
0041 rom_19h {
0042 rom-addr = /bits/ 8 <0x19>;
0043 rom-val = /bits/ 8 <0x0f>;
0044 };
0045 };
0046
0047 /* LP8556 */
0048 backlight@2c {
0049 compatible = "ti,lp8556";
0050 reg = <0x2c>;
0051
0052 bl-name = "lcd-bl";
0053 dev-ctrl = /bits/ 8 <0x85>;
0054 init-brt = /bits/ 8 <0x10>;
0055 };
0056
0057 /* LP8557 */
0058 backlight@2c {
0059 compatible = "ti,lp8557";
0060 reg = <0x2c>;
0061 enable-supply = <&backlight_vddio>;
0062 power-supply = <&backlight_vdd>;
0063
0064 dev-ctrl = /bits/ 8 <0x41>;
0065 init-brt = /bits/ 8 <0x0a>;
0066
0067 /* 4V OV, 4 output LED string enabled */
0068 rom_14h {
0069 rom-addr = /bits/ 8 <0x14>;
0070 rom-val = /bits/ 8 <0xcf>;
0071 };
0072 };
