docs: lp855x-driver.rst: add it to the driver-api book

The content of this file is intended for backlight Kernel
developers.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

1 files changed, 0 insertions, 83 deletions

diff --git a/Documentation/backlight/lp855x-driver.rst b/Documentation/backlight/lp855x-driver.rst
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--- a/Documentation/backlight/lp855x-driver.rst
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-:orphan:
-
-====================
-Kernel driver lp855x
-====================
-
-Backlight driver for LP855x ICs
-
-Supported chips:
-
-	Texas Instruments LP8550, LP8551, LP8552, LP8553, LP8555, LP8556 and
-	LP8557
-
-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/lp8555/lp8556/lp8557
-
-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.
-* device_control:
-	Value of DEVICE CONTROL register.
-* initial_brightness:
-	Initial value of backlight brightness.
-* period_ns:
-	Platform specific PWM period value. unit is nano.
-	Only valid when brightness is pwm input mode.
-* size_program:
-	Total size of lp855x_rom_data.
-* rom_data:
-	List of new eeprom/eprom registers.
-
-Examples
-========
-
-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",
-	.device_control = I2C_CONFIG(LP8552),
-	.initial_brightness = INITIAL_BRT,
-	.size_program = ARRAY_SIZE(lp8552_eeprom_arr),
-	.rom_data = lp8552_eeprom_arr,
-    };
-
-2) lp8556 platform data: pwm input mode with default rom data::
-
-    static struct lp855x_platform_data lp8556_pdata = {
-	.device_control = PWM_CONFIG(LP8556),
-	.initial_brightness = INITIAL_BRT,
-	.period_ns = 1000000,
-    };