mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-26 22:24:09 +08:00
5812c13a4e
LP8555 is one of the LP855x family devices. This device needs pre_init_device() and post_init_device() driver structure. It's same as LP8557, so the device configuration code is shared with LP8557. Backlight outputs are generated from dual DC-DC boost converters. It's configurable EPROM settings which are defined in the platform data. Driver documentation and device tree bindings are updated. Signed-off-by: Milo Kim <milo.kim@ti.com> Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
150 lines
4.1 KiB
C
150 lines
4.1 KiB
C
/*
|
|
* LP855x Backlight Driver
|
|
*
|
|
* Copyright (C) 2011 Texas Instruments
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
*/
|
|
|
|
#ifndef _LP855X_H
|
|
#define _LP855X_H
|
|
|
|
#define BL_CTL_SHFT (0)
|
|
#define BRT_MODE_SHFT (1)
|
|
#define BRT_MODE_MASK (0x06)
|
|
|
|
/* Enable backlight. Only valid when BRT_MODE=10(I2C only) */
|
|
#define ENABLE_BL (1)
|
|
#define DISABLE_BL (0)
|
|
|
|
#define I2C_CONFIG(id) id ## _I2C_CONFIG
|
|
#define PWM_CONFIG(id) id ## _PWM_CONFIG
|
|
|
|
/* DEVICE CONTROL register - LP8550 */
|
|
#define LP8550_PWM_CONFIG (LP8550_PWM_ONLY << BRT_MODE_SHFT)
|
|
#define LP8550_I2C_CONFIG ((ENABLE_BL << BL_CTL_SHFT) | \
|
|
(LP8550_I2C_ONLY << BRT_MODE_SHFT))
|
|
|
|
/* DEVICE CONTROL register - LP8551 */
|
|
#define LP8551_PWM_CONFIG LP8550_PWM_CONFIG
|
|
#define LP8551_I2C_CONFIG LP8550_I2C_CONFIG
|
|
|
|
/* DEVICE CONTROL register - LP8552 */
|
|
#define LP8552_PWM_CONFIG LP8550_PWM_CONFIG
|
|
#define LP8552_I2C_CONFIG LP8550_I2C_CONFIG
|
|
|
|
/* DEVICE CONTROL register - LP8553 */
|
|
#define LP8553_PWM_CONFIG LP8550_PWM_CONFIG
|
|
#define LP8553_I2C_CONFIG LP8550_I2C_CONFIG
|
|
|
|
/* CONFIG register - LP8555 */
|
|
#define LP8555_PWM_STANDBY BIT(7)
|
|
#define LP8555_PWM_FILTER BIT(6)
|
|
#define LP8555_RELOAD_EPROM BIT(3) /* use it if EPROMs should be reset
|
|
when the backlight turns on */
|
|
#define LP8555_OFF_OPENLEDS BIT(2)
|
|
#define LP8555_PWM_CONFIG LP8555_PWM_ONLY
|
|
#define LP8555_I2C_CONFIG LP8555_I2C_ONLY
|
|
#define LP8555_COMB1_CONFIG LP8555_COMBINED1
|
|
#define LP8555_COMB2_CONFIG LP8555_COMBINED2
|
|
|
|
/* DEVICE CONTROL register - LP8556 */
|
|
#define LP8556_PWM_CONFIG (LP8556_PWM_ONLY << BRT_MODE_SHFT)
|
|
#define LP8556_COMB1_CONFIG (LP8556_COMBINED1 << BRT_MODE_SHFT)
|
|
#define LP8556_I2C_CONFIG ((ENABLE_BL << BL_CTL_SHFT) | \
|
|
(LP8556_I2C_ONLY << BRT_MODE_SHFT))
|
|
#define LP8556_COMB2_CONFIG (LP8556_COMBINED2 << BRT_MODE_SHFT)
|
|
#define LP8556_FAST_CONFIG BIT(7) /* use it if EPROMs should be maintained
|
|
when exiting the low power mode */
|
|
|
|
/* CONFIG register - LP8557 */
|
|
#define LP8557_PWM_STANDBY BIT(7)
|
|
#define LP8557_PWM_FILTER BIT(6)
|
|
#define LP8557_RELOAD_EPROM BIT(3) /* use it if EPROMs should be reset
|
|
when the backlight turns on */
|
|
#define LP8557_OFF_OPENLEDS BIT(2)
|
|
#define LP8557_PWM_CONFIG LP8557_PWM_ONLY
|
|
#define LP8557_I2C_CONFIG LP8557_I2C_ONLY
|
|
#define LP8557_COMB1_CONFIG LP8557_COMBINED1
|
|
#define LP8557_COMB2_CONFIG LP8557_COMBINED2
|
|
|
|
enum lp855x_chip_id {
|
|
LP8550,
|
|
LP8551,
|
|
LP8552,
|
|
LP8553,
|
|
LP8555,
|
|
LP8556,
|
|
LP8557,
|
|
};
|
|
|
|
enum lp8550_brighntess_source {
|
|
LP8550_PWM_ONLY,
|
|
LP8550_I2C_ONLY = 2,
|
|
};
|
|
|
|
enum lp8551_brighntess_source {
|
|
LP8551_PWM_ONLY = LP8550_PWM_ONLY,
|
|
LP8551_I2C_ONLY = LP8550_I2C_ONLY,
|
|
};
|
|
|
|
enum lp8552_brighntess_source {
|
|
LP8552_PWM_ONLY = LP8550_PWM_ONLY,
|
|
LP8552_I2C_ONLY = LP8550_I2C_ONLY,
|
|
};
|
|
|
|
enum lp8553_brighntess_source {
|
|
LP8553_PWM_ONLY = LP8550_PWM_ONLY,
|
|
LP8553_I2C_ONLY = LP8550_I2C_ONLY,
|
|
};
|
|
|
|
enum lp8555_brightness_source {
|
|
LP8555_PWM_ONLY,
|
|
LP8555_I2C_ONLY,
|
|
LP8555_COMBINED1, /* Brightness register with shaped PWM */
|
|
LP8555_COMBINED2, /* PWM with shaped brightness register */
|
|
};
|
|
|
|
enum lp8556_brightness_source {
|
|
LP8556_PWM_ONLY,
|
|
LP8556_COMBINED1, /* pwm + i2c before the shaper block */
|
|
LP8556_I2C_ONLY,
|
|
LP8556_COMBINED2, /* pwm + i2c after the shaper block */
|
|
};
|
|
|
|
enum lp8557_brightness_source {
|
|
LP8557_PWM_ONLY,
|
|
LP8557_I2C_ONLY,
|
|
LP8557_COMBINED1, /* pwm + i2c after the shaper block */
|
|
LP8557_COMBINED2, /* pwm + i2c before the shaper block */
|
|
};
|
|
|
|
struct lp855x_rom_data {
|
|
u8 addr;
|
|
u8 val;
|
|
};
|
|
|
|
/**
|
|
* struct lp855x_platform_data
|
|
* @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 mode is PWM_BASED.
|
|
* @size_program : total size of lp855x_rom_data
|
|
* @rom_data : list of new eeprom/eprom registers
|
|
*/
|
|
struct lp855x_platform_data {
|
|
const char *name;
|
|
u8 device_control;
|
|
u8 initial_brightness;
|
|
unsigned int period_ns;
|
|
int size_program;
|
|
struct lp855x_rom_data *rom_data;
|
|
};
|
|
|
|
#endif
|