Documentation/devicetree/bindings/video/backlight/lp855x.txt

   1 lp855x bindings
   2
   3 Required properties:
   4   - compatible: "ti,lp8550", "ti,lp8551", "ti,lp8552", "ti,lp8553",
   5                 "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
  16 Example:
  17
  18         /* LP8556 */
  19         backlight@2c {
  20                 compatible = "ti,lp8556";
  21                 reg = <0x2c>;
  22
  23                 bl-name = "lcd-bl";
  24                 dev-ctrl = /bits/ 8 <0x85>;
  25                 init-brt = /bits/ 8 <0x10>;
  26         };
  27
  28         /* LP8557 */
  29         backlight@2c {
  30                 compatible = "ti,lp8557";
  31                 reg = <0x2c>;
  32
  33                 dev-ctrl = /bits/ 8 <0x41>;
  34                 init-brt = /bits/ 8 <0x0a>;
  35
  36                 /* 4V OV, 4 output LED string enabled */
  37                 rom_14h {
  38                         rom-addr = /bits/ 8 <0x14>;
  39                         rom-val = /bits/ 8 <0xcf>;
  40                 };
  41         };