2 * LP55XX Common Driver Header
4 * Copyright (C) 2012 Texas Instruments
6 * Author: Milo(Woogyom) Kim <milo.kim@ti.com>
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * version 2 as published by the Free Software Foundation.
12 * Derived from leds-lp5521.c, leds-lp5523.c
15 #ifndef _LEDS_LP55XX_COMMON_H
16 #define _LEDS_LP55XX_COMMON_H
23 * @addr : Register address
24 * @val : Register value
32 * struct lp55xx_device_config
33 * @reset : Chip specific reset command
34 * @enable : Chip specific enable command
35 * @post_init_device : Chip specific initialization code
36 * @brightness_work_fn : Brightness work function
37 * @set_led_current : LED current set function
39 struct lp55xx_device_config {
40 const struct lp55xx_reg reset;
41 const struct lp55xx_reg enable;
43 /* define if the device has specific initialization process */
44 int (*post_init_device) (struct lp55xx_chip *chip);
46 /* access brightness register */
47 void (*brightness_work_fn)(struct work_struct *work);
49 /* current setting function */
50 void (*set_led_current) (struct lp55xx_led *led, u8 led_current);
55 * @cl : I2C communication for access registers
56 * @pdata : Platform specific data
57 * @lock : Lock for user-space interface
58 * @num_leds : Number of registered LEDs
59 * @cfg : Device specific configuration data
62 struct i2c_client *cl;
63 struct lp55xx_platform_data *pdata;
64 struct mutex lock; /* lock for user-space interface */
66 struct lp55xx_device_config *cfg;
71 * @chan_nr : Channel number
72 * @cdev : LED class device
73 * @led_current : Current setting at each led channel
74 * @max_current : Maximun current at each led channel
75 * @brightness_work : Workqueue for brightness control
76 * @brightness : Brightness value
77 * @chip : The lp55xx chip data
81 struct led_classdev cdev;
84 struct work_struct brightness_work;
86 struct lp55xx_chip *chip;
90 extern int lp55xx_write(struct lp55xx_chip *chip, u8 reg, u8 val);
91 extern int lp55xx_read(struct lp55xx_chip *chip, u8 reg, u8 *val);
92 extern int lp55xx_update_bits(struct lp55xx_chip *chip, u8 reg,
95 /* common device init/deinit functions */
96 extern int lp55xx_init_device(struct lp55xx_chip *chip);
97 extern void lp55xx_deinit_device(struct lp55xx_chip *chip);
99 /* common LED class device functions */
100 extern int lp55xx_register_leds(struct lp55xx_led *led,
101 struct lp55xx_chip *chip);
102 #endif /* _LEDS_LP55XX_COMMON_H */