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diff --git a/Documentation/backlight/lp855x-driver.txt b/Documentation/backlight/lp855x-driver.txt deleted file mode 100644 index 01bce243d3d7..000000000000 --- a/Documentation/backlight/lp855x-driver.txt +++ /dev/null | |||
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| 1 | Kernel driver lp855x | ||
| 2 | ==================== | ||
| 3 | |||
| 4 | Backlight driver for LP855x ICs | ||
| 5 | |||
| 6 | Supported chips: | ||
| 7 | Texas Instruments LP8550, LP8551, LP8552, LP8553, LP8555, LP8556 and | ||
| 8 | LP8557 | ||
| 9 | |||
| 10 | Author: Milo(Woogyom) Kim <milo.kim@ti.com> | ||
| 11 | |||
| 12 | Description | ||
| 13 | ----------- | ||
| 14 | |||
| 15 | * Brightness control | ||
| 16 | |||
| 17 | Brightness can be controlled by the pwm input or the i2c command. | ||
| 18 | The lp855x driver supports both cases. | ||
| 19 | |||
| 20 | * Device attributes | ||
| 21 | |||
| 22 | 1) bl_ctl_mode | ||
| 23 | Backlight control mode. | ||
| 24 | Value : pwm based or register based | ||
| 25 | |||
| 26 | 2) chip_id | ||
| 27 | The lp855x chip id. | ||
| 28 | Value : lp8550/lp8551/lp8552/lp8553/lp8555/lp8556/lp8557 | ||
| 29 | |||
| 30 | Platform data for lp855x | ||
| 31 | ------------------------ | ||
| 32 | |||
| 33 | For supporting platform specific data, the lp855x platform data can be used. | ||
| 34 | |||
| 35 | * name : Backlight driver name. If it is not defined, default name is set. | ||
| 36 | * device_control : Value of DEVICE CONTROL register. | ||
| 37 | * initial_brightness : Initial value of backlight brightness. | ||
| 38 | * period_ns : Platform specific PWM period value. unit is nano. | ||
| 39 | Only valid when brightness is pwm input mode. | ||
| 40 | * size_program : Total size of lp855x_rom_data. | ||
| 41 | * rom_data : List of new eeprom/eprom registers. | ||
| 42 | |||
| 43 | example 1) lp8552 platform data : i2c register mode with new eeprom data | ||
| 44 | |||
| 45 | #define EEPROM_A5_ADDR 0xA5 | ||
| 46 | #define EEPROM_A5_VAL 0x4f /* EN_VSYNC=0 */ | ||
| 47 | |||
| 48 | static struct lp855x_rom_data lp8552_eeprom_arr[] = { | ||
| 49 | {EEPROM_A5_ADDR, EEPROM_A5_VAL}, | ||
| 50 | }; | ||
| 51 | |||
| 52 | static struct lp855x_platform_data lp8552_pdata = { | ||
| 53 | .name = "lcd-bl", | ||
| 54 | .device_control = I2C_CONFIG(LP8552), | ||
| 55 | .initial_brightness = INITIAL_BRT, | ||
| 56 | .size_program = ARRAY_SIZE(lp8552_eeprom_arr), | ||
| 57 | .rom_data = lp8552_eeprom_arr, | ||
| 58 | }; | ||
| 59 | |||
| 60 | example 2) lp8556 platform data : pwm input mode with default rom data | ||
| 61 | |||
| 62 | static struct lp855x_platform_data lp8556_pdata = { | ||
| 63 | .device_control = PWM_CONFIG(LP8556), | ||
| 64 | .initial_brightness = INITIAL_BRT, | ||
| 65 | .period_ns = 1000000, | ||
| 66 | }; | ||
