Commit | Line | Data |
---|---|---|
c93d08fa MWK |
1 | /* |
2 | * LP5521/LP5523/LP55231 Common Driver | |
3 | * | |
4 | * Copyright 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 modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | * | |
12 | * Derived from leds-lp5521.c, leds-lp5523.c | |
13 | */ | |
14 | ||
a85908dd | 15 | #include <linux/delay.h> |
c93d08fa MWK |
16 | #include <linux/i2c.h> |
17 | #include <linux/leds.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/platform_data/leds-lp55xx.h> | |
20 | ||
21 | #include "leds-lp55xx-common.h" | |
22 | ||
23 | int lp55xx_write(struct lp55xx_chip *chip, u8 reg, u8 val) | |
24 | { | |
25 | return i2c_smbus_write_byte_data(chip->cl, reg, val); | |
26 | } | |
27 | EXPORT_SYMBOL_GPL(lp55xx_write); | |
28 | ||
29 | int lp55xx_read(struct lp55xx_chip *chip, u8 reg, u8 *val) | |
30 | { | |
31 | s32 ret; | |
32 | ||
33 | ret = i2c_smbus_read_byte_data(chip->cl, reg); | |
34 | if (ret < 0) | |
35 | return ret; | |
36 | ||
37 | *val = ret; | |
38 | return 0; | |
39 | } | |
40 | EXPORT_SYMBOL_GPL(lp55xx_read); | |
41 | ||
42 | int lp55xx_update_bits(struct lp55xx_chip *chip, u8 reg, u8 mask, u8 val) | |
43 | { | |
44 | int ret; | |
45 | u8 tmp; | |
46 | ||
47 | ret = lp55xx_read(chip, reg, &tmp); | |
48 | if (ret) | |
49 | return ret; | |
50 | ||
51 | tmp &= ~mask; | |
52 | tmp |= val & mask; | |
53 | ||
54 | return lp55xx_write(chip, reg, tmp); | |
55 | } | |
56 | EXPORT_SYMBOL_GPL(lp55xx_update_bits); | |
57 | ||
a85908dd MWK |
58 | int lp55xx_init_device(struct lp55xx_chip *chip) |
59 | { | |
60 | struct lp55xx_platform_data *pdata; | |
61 | struct device *dev = &chip->cl->dev; | |
62 | int ret = 0; | |
63 | ||
64 | WARN_ON(!chip); | |
65 | ||
66 | pdata = chip->pdata; | |
67 | ||
68 | if (!pdata) | |
69 | return -EINVAL; | |
70 | ||
71 | if (pdata->setup_resources) { | |
72 | ret = pdata->setup_resources(); | |
73 | if (ret < 0) { | |
74 | dev_err(dev, "setup resoure err: %d\n", ret); | |
75 | goto err; | |
76 | } | |
77 | } | |
78 | ||
79 | if (pdata->enable) { | |
80 | pdata->enable(0); | |
81 | usleep_range(1000, 2000); /* Keep enable down at least 1ms */ | |
82 | pdata->enable(1); | |
83 | usleep_range(1000, 2000); /* 500us abs min. */ | |
84 | } | |
85 | ||
86 | err: | |
87 | return ret; | |
88 | } | |
89 | EXPORT_SYMBOL_GPL(lp55xx_init_device); | |
90 | ||
c93d08fa MWK |
91 | MODULE_AUTHOR("Milo Kim <milo.kim@ti.com>"); |
92 | MODULE_DESCRIPTION("LP55xx Common Driver"); | |
93 | MODULE_LICENSE("GPL"); |