Based on kernel version 4.3. Page generated on 2015-11-02 12:47 EST.
1 lp855x bindings 2 3 Required 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 9 Optional 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 17 Example: 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 };