| /* |
| * LP55XX Common Driver Header |
| * |
| * Copyright (C) 2012 Texas Instruments |
| * |
| * Author: Milo(Woogyom) Kim <milo.kim@ti.com> |
| * |
| * 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. |
| * |
| * Derived from leds-lp5521.c, leds-lp5523.c |
| */ |
| |
| #ifndef _LEDS_LP55XX_COMMON_H |
| #define _LEDS_LP55XX_COMMON_H |
| |
| struct lp55xx_led; |
| struct lp55xx_chip; |
| |
| /* |
| * struct lp55xx_reg |
| * @addr : Register address |
| * @val : Register value |
| */ |
| struct lp55xx_reg { |
| u8 addr; |
| u8 val; |
| }; |
| |
| /* |
| * struct lp55xx_device_config |
| * @reset : Chip specific reset command |
| * @enable : Chip specific enable command |
| * @max_channel : Maximum number of channels |
| * @post_init_device : Chip specific initialization code |
| * @brightness_work_fn : Brightness work function |
| * @set_led_current : LED current set function |
| */ |
| struct lp55xx_device_config { |
| const struct lp55xx_reg reset; |
| const struct lp55xx_reg enable; |
| const int max_channel; |
| |
| /* define if the device has specific initialization process */ |
| int (*post_init_device) (struct lp55xx_chip *chip); |
| |
| /* access brightness register */ |
| void (*brightness_work_fn)(struct work_struct *work); |
| |
| /* current setting function */ |
| void (*set_led_current) (struct lp55xx_led *led, u8 led_current); |
| }; |
| |
| /* |
| * struct lp55xx_chip |
| * @cl : I2C communication for access registers |
| * @pdata : Platform specific data |
| * @lock : Lock for user-space interface |
| * @num_leds : Number of registered LEDs |
| * @cfg : Device specific configuration data |
| */ |
| struct lp55xx_chip { |
| struct i2c_client *cl; |
| struct lp55xx_platform_data *pdata; |
| struct mutex lock; /* lock for user-space interface */ |
| int num_leds; |
| struct lp55xx_device_config *cfg; |
| }; |
| |
| /* |
| * struct lp55xx_led |
| * @chan_nr : Channel number |
| * @cdev : LED class device |
| * @led_current : Current setting at each led channel |
| * @max_current : Maximun current at each led channel |
| * @brightness_work : Workqueue for brightness control |
| * @brightness : Brightness value |
| * @chip : The lp55xx chip data |
| */ |
| struct lp55xx_led { |
| int chan_nr; |
| struct led_classdev cdev; |
| u8 led_current; |
| u8 max_current; |
| struct work_struct brightness_work; |
| u8 brightness; |
| struct lp55xx_chip *chip; |
| }; |
| |
| /* register access */ |
| extern int lp55xx_write(struct lp55xx_chip *chip, u8 reg, u8 val); |
| extern int lp55xx_read(struct lp55xx_chip *chip, u8 reg, u8 *val); |
| extern int lp55xx_update_bits(struct lp55xx_chip *chip, u8 reg, |
| u8 mask, u8 val); |
| |
| /* common device init/deinit functions */ |
| extern int lp55xx_init_device(struct lp55xx_chip *chip); |
| extern void lp55xx_deinit_device(struct lp55xx_chip *chip); |
| |
| /* common LED class device functions */ |
| extern int lp55xx_register_leds(struct lp55xx_led *led, |
| struct lp55xx_chip *chip); |
| extern void lp55xx_unregister_leds(struct lp55xx_led *led, |
| struct lp55xx_chip *chip); |
| #endif /* _LEDS_LP55XX_COMMON_H */ |
