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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
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>;
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>;
};
};
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