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
18 enum lp55xx_engine_index {
19 LP55XX_ENGINE_INVALID,
30 * @addr : Register address
31 * @val : Register value
39 * struct lp55xx_device_config
40 * @reset : Chip specific reset command
41 * @enable : Chip specific enable command
42 * @max_channel : Maximum number of channels
43 * @post_init_device : Chip specific initialization code
44 * @brightness_work_fn : Brightness work function
45 * @set_led_current : LED current set function
46 * @firmware_cb : Call function when the firmware is loaded
47 * @run_engine : Run internal engine for pattern
48 * @dev_attr_group : Device specific attributes
50 struct lp55xx_device_config {
51 const struct lp55xx_reg reset;
52 const struct lp55xx_reg enable;
53 const int max_channel;
55 /* define if the device has specific initialization process */
56 int (*post_init_device) (struct lp55xx_chip *chip);
58 /* access brightness register */
59 void (*brightness_work_fn)(struct work_struct *work);
61 /* current setting function */
62 void (*set_led_current) (struct lp55xx_led *led, u8 led_current);
64 /* access program memory when the firmware is loaded */
65 void (*firmware_cb)(struct lp55xx_chip *chip);
67 /* used for running firmware LED patterns */
68 void (*run_engine) (struct lp55xx_chip *chip, bool start);
70 /* additional device specific attributes */
71 const struct attribute_group *dev_attr_group;
76 * @cl : I2C communication for access registers
77 * @pdata : Platform specific data
78 * @lock : Lock for user-space interface
79 * @num_leds : Number of registered LEDs
80 * @cfg : Device specific configuration data
81 * @engine_idx : Selected engine number
82 * @fw : Firmware data for running a LED pattern
85 struct i2c_client *cl;
87 struct lp55xx_platform_data *pdata;
88 struct mutex lock; /* lock for user-space interface */
90 struct lp55xx_device_config *cfg;
91 enum lp55xx_engine_index engine_idx;
92 const struct firmware *fw;
97 * @chan_nr : Channel number
98 * @cdev : LED class device
99 * @led_current : Current setting at each led channel
100 * @max_current : Maximun current at each led channel
101 * @brightness_work : Workqueue for brightness control
102 * @brightness : Brightness value
103 * @chip : The lp55xx chip data
107 struct led_classdev cdev;
110 struct work_struct brightness_work;
112 struct lp55xx_chip *chip;
115 /* register access */
116 extern int lp55xx_write(struct lp55xx_chip *chip, u8 reg, u8 val);
117 extern int lp55xx_read(struct lp55xx_chip *chip, u8 reg, u8 *val);
118 extern int lp55xx_update_bits(struct lp55xx_chip *chip, u8 reg,
121 /* external clock detection */
122 extern bool lp55xx_is_extclk_used(struct lp55xx_chip *chip);
124 /* common device init/deinit functions */
125 extern int lp55xx_init_device(struct lp55xx_chip *chip);
126 extern void lp55xx_deinit_device(struct lp55xx_chip *chip);
128 /* common LED class device functions */
129 extern int lp55xx_register_leds(struct lp55xx_led *led,
130 struct lp55xx_chip *chip);
131 extern void lp55xx_unregister_leds(struct lp55xx_led *led,
132 struct lp55xx_chip *chip);
134 /* common device attributes functions */
135 extern int lp55xx_register_sysfs(struct lp55xx_chip *chip);
136 extern void lp55xx_unregister_sysfs(struct lp55xx_chip *chip);
138 /* common device tree population function */
139 extern int lp55xx_of_populate_pdata(struct device *dev,
140 struct device_node *np);
142 #endif /* _LEDS_LP55XX_COMMON_H */