summaryrefslogtreecommitdiffstats
path: root/Documentation/backlight/lp855x-driver.txt
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/backlight/lp855x-driver.txt')
-rw-r--r--Documentation/backlight/lp855x-driver.txt78
1 files changed, 0 insertions, 78 deletions
diff --git a/Documentation/backlight/lp855x-driver.txt b/Documentation/backlight/lp855x-driver.txt
deleted file mode 100644
index f5e4caa..0000000
--- a/Documentation/backlight/lp855x-driver.txt
+++ /dev/null
@@ -1,78 +0,0 @@
-Kernel driver lp855x
-====================
-
-Backlight driver for LP855x ICs
-
-Supported chips:
- Texas Instruments LP8550, LP8551, LP8552, LP8553 and LP8556
-
-Author: Milo(Woogyom) Kim <milo.kim@ti.com>
-
-Description
------------
-
-* Brightness control
-
-Brightness can be controlled by the pwm input or the i2c command.
-The lp855x driver supports both cases.
-
-* Device attributes
-
-1) bl_ctl_mode
-Backlight control mode.
-Value : pwm based or register based
-
-2) chip_id
-The lp855x chip id.
-Value : lp8550/lp8551/lp8552/lp8553/lp8556
-
-Platform data for lp855x
-------------------------
-
-For supporting platform specific data, the lp855x platform data can be used.
-
-* name : Backlight driver name. If it is not defined, default name is set.
-* mode : Brightness control mode. PWM or register based.
-* device_control : Value of DEVICE CONTROL register.
-* initial_brightness : Initial value of backlight brightness.
-* pwm_data : Platform specific pwm generation functions.
- Only valid when brightness is pwm input mode.
- Functions should be implemented by PWM driver.
- - pwm_set_intensity() : set duty of PWM
- - pwm_get_intensity() : get current duty of PWM
-* load_new_rom_data :
- 0 : use default configuration data
- 1 : update values of eeprom or eprom registers on loading driver
-* size_program : Total size of lp855x_rom_data.
-* rom_data : List of new eeprom/eprom registers.
-
-example 1) lp8552 platform data : i2c register mode with new eeprom data
-
-#define EEPROM_A5_ADDR 0xA5
-#define EEPROM_A5_VAL 0x4f /* EN_VSYNC=0 */
-
-static struct lp855x_rom_data lp8552_eeprom_arr[] = {
- {EEPROM_A5_ADDR, EEPROM_A5_VAL},
-};
-
-static struct lp855x_platform_data lp8552_pdata = {
- .name = "lcd-bl",
- .mode = REGISTER_BASED,
- .device_control = I2C_CONFIG(LP8552),
- .initial_brightness = INITIAL_BRT,
- .load_new_rom_data = 1,
- .size_program = ARRAY_SIZE(lp8552_eeprom_arr),
- .rom_data = lp8552_eeprom_arr,
-};
-
-example 2) lp8556 platform data : pwm input mode with default rom data
-
-static struct lp855x_platform_data lp8556_pdata = {
- .mode = PWM_BASED,
- .device_control = PWM_CONFIG(LP8556),
- .initial_brightness = INITIAL_BRT,
- .pwm_data = {
- .pwm_set_intensity = platform_pwm_set_intensity,
- .pwm_get_intensity = platform_pwm_get_intensity,
- },
-};