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c93d08fa MWK |
1 | /* |
2 | * LP55XX Common Driver Header | |
3 | * | |
4 | * Copyright (C) 2012 Texas Instruments | |
5 | * | |
6 | * Author: Milo(Woogyom) Kim <milo.kim@ti.com> | |
7 | * | |
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. | |
11 | * | |
12 | * Derived from leds-lp5521.c, leds-lp5523.c | |
13 | */ | |
14 | ||
15 | #ifndef _LEDS_LP55XX_COMMON_H | |
16 | #define _LEDS_LP55XX_COMMON_H | |
17 | ||
18 | struct lp55xx_led; | |
19 | struct lp55xx_chip; | |
20 | ||
48068d5d MWK |
21 | /* |
22 | * struct lp55xx_reg | |
23 | * @addr : Register address | |
24 | * @val : Register value | |
25 | */ | |
26 | struct lp55xx_reg { | |
27 | u8 addr; | |
28 | u8 val; | |
29 | }; | |
30 | ||
31 | /* | |
32 | * struct lp55xx_device_config | |
33 | * @reset : Chip specific reset command | |
e3a700d8 | 34 | * @enable : Chip specific enable command |
0e202346 | 35 | * @max_channel : Maximum number of channels |
ffbdccdb | 36 | * @post_init_device : Chip specific initialization code |
9e9b3db1 MWK |
37 | * @brightness_work_fn : Brightness work function |
38 | * @set_led_current : LED current set function | |
48068d5d MWK |
39 | */ |
40 | struct lp55xx_device_config { | |
41 | const struct lp55xx_reg reset; | |
e3a700d8 | 42 | const struct lp55xx_reg enable; |
0e202346 | 43 | const int max_channel; |
ffbdccdb MWK |
44 | |
45 | /* define if the device has specific initialization process */ | |
46 | int (*post_init_device) (struct lp55xx_chip *chip); | |
9e9b3db1 MWK |
47 | |
48 | /* access brightness register */ | |
49 | void (*brightness_work_fn)(struct work_struct *work); | |
50 | ||
51 | /* current setting function */ | |
52 | void (*set_led_current) (struct lp55xx_led *led, u8 led_current); | |
48068d5d MWK |
53 | }; |
54 | ||
c93d08fa MWK |
55 | /* |
56 | * struct lp55xx_chip | |
57 | * @cl : I2C communication for access registers | |
58 | * @pdata : Platform specific data | |
59 | * @lock : Lock for user-space interface | |
60 | * @num_leds : Number of registered LEDs | |
48068d5d | 61 | * @cfg : Device specific configuration data |
c93d08fa MWK |
62 | */ |
63 | struct lp55xx_chip { | |
64 | struct i2c_client *cl; | |
65 | struct lp55xx_platform_data *pdata; | |
66 | struct mutex lock; /* lock for user-space interface */ | |
67 | int num_leds; | |
48068d5d | 68 | struct lp55xx_device_config *cfg; |
c93d08fa MWK |
69 | }; |
70 | ||
71 | /* | |
72 | * struct lp55xx_led | |
73 | * @chan_nr : Channel number | |
74 | * @cdev : LED class device | |
75 | * @led_current : Current setting at each led channel | |
76 | * @max_current : Maximun current at each led channel | |
77 | * @brightness_work : Workqueue for brightness control | |
78 | * @brightness : Brightness value | |
79 | * @chip : The lp55xx chip data | |
80 | */ | |
81 | struct lp55xx_led { | |
82 | int chan_nr; | |
83 | struct led_classdev cdev; | |
84 | u8 led_current; | |
85 | u8 max_current; | |
86 | struct work_struct brightness_work; | |
87 | u8 brightness; | |
88 | struct lp55xx_chip *chip; | |
89 | }; | |
90 | ||
91 | /* register access */ | |
92 | extern int lp55xx_write(struct lp55xx_chip *chip, u8 reg, u8 val); | |
93 | extern int lp55xx_read(struct lp55xx_chip *chip, u8 reg, u8 *val); | |
94 | extern int lp55xx_update_bits(struct lp55xx_chip *chip, u8 reg, | |
95 | u8 mask, u8 val); | |
96 | ||
6ce61762 | 97 | /* common device init/deinit functions */ |
a85908dd | 98 | extern int lp55xx_init_device(struct lp55xx_chip *chip); |
6ce61762 | 99 | extern void lp55xx_deinit_device(struct lp55xx_chip *chip); |
a85908dd | 100 | |
9e9b3db1 MWK |
101 | /* common LED class device functions */ |
102 | extern int lp55xx_register_leds(struct lp55xx_led *led, | |
103 | struct lp55xx_chip *chip); | |
c93d08fa | 104 | #endif /* _LEDS_LP55XX_COMMON_H */ |