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2896434c AJ |
1 | /* I2C access for DA9055 PMICs. |
2 | * | |
3 | * Copyright(c) 2012 Dialog Semiconductor Ltd. | |
4 | * | |
5 | * Author: David Dajun Chen <dchen@diasemi.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | */ | |
13 | ||
14 | #include <linux/module.h> | |
15 | #include <linux/device.h> | |
16 | #include <linux/i2c.h> | |
17 | #include <linux/err.h> | |
d9a33515 AT |
18 | #include <linux/of.h> |
19 | #include <linux/of_device.h> | |
2896434c AJ |
20 | |
21 | #include <linux/mfd/da9055/core.h> | |
22 | ||
f791be49 | 23 | static int da9055_i2c_probe(struct i2c_client *i2c, |
2896434c AJ |
24 | const struct i2c_device_id *id) |
25 | { | |
26 | struct da9055 *da9055; | |
27 | int ret; | |
28 | ||
29 | da9055 = devm_kzalloc(&i2c->dev, sizeof(struct da9055), GFP_KERNEL); | |
30 | if (!da9055) | |
31 | return -ENOMEM; | |
32 | ||
33 | da9055->regmap = devm_regmap_init_i2c(i2c, &da9055_regmap_config); | |
34 | if (IS_ERR(da9055->regmap)) { | |
35 | ret = PTR_ERR(da9055->regmap); | |
36 | dev_err(&i2c->dev, "Failed to allocate register map: %d\n", | |
37 | ret); | |
38 | return ret; | |
39 | } | |
40 | ||
41 | da9055->dev = &i2c->dev; | |
42 | da9055->chip_irq = i2c->irq; | |
43 | ||
44 | i2c_set_clientdata(i2c, da9055); | |
45 | ||
46 | return da9055_device_init(da9055); | |
47 | } | |
48 | ||
4740f73f | 49 | static int da9055_i2c_remove(struct i2c_client *i2c) |
2896434c AJ |
50 | { |
51 | struct da9055 *da9055 = i2c_get_clientdata(i2c); | |
52 | ||
53 | da9055_device_exit(da9055); | |
54 | ||
55 | return 0; | |
56 | } | |
57 | ||
07b0e5b1 AT |
58 | /* |
59 | * DO NOT change the device Ids. The naming is intentionally specific as both | |
60 | * the PMIC and CODEC parts of this chip are instantiated separately as I2C | |
61 | * devices (both have configurable I2C addresses, and are to all intents and | |
62 | * purposes separate). As a result there are specific DA9055 ids for PMIC | |
63 | * and CODEC, which must be different to operate together. | |
64 | */ | |
2896434c | 65 | static struct i2c_device_id da9055_i2c_id[] = { |
07b0e5b1 | 66 | {"da9055-pmic", 0}, |
2896434c AJ |
67 | { } |
68 | }; | |
07b0e5b1 | 69 | MODULE_DEVICE_TABLE(i2c, da9055_i2c_id); |
2896434c | 70 | |
d9a33515 AT |
71 | static const struct of_device_id da9055_of_match[] = { |
72 | { .compatible = "dlg,da9055-pmic", }, | |
73 | { } | |
74 | }; | |
75 | ||
2896434c AJ |
76 | static struct i2c_driver da9055_i2c_driver = { |
77 | .probe = da9055_i2c_probe, | |
84449216 | 78 | .remove = da9055_i2c_remove, |
2896434c AJ |
79 | .id_table = da9055_i2c_id, |
80 | .driver = { | |
07b0e5b1 | 81 | .name = "da9055-pmic", |
2896434c | 82 | .owner = THIS_MODULE, |
d9a33515 | 83 | .of_match_table = of_match_ptr(da9055_of_match), |
2896434c AJ |
84 | }, |
85 | }; | |
86 | ||
87 | static int __init da9055_i2c_init(void) | |
88 | { | |
89 | int ret; | |
90 | ||
91 | ret = i2c_add_driver(&da9055_i2c_driver); | |
92 | if (ret != 0) { | |
93 | pr_err("DA9055 I2C registration failed %d\n", ret); | |
94 | return ret; | |
95 | } | |
96 | ||
97 | return 0; | |
98 | } | |
99 | subsys_initcall(da9055_i2c_init); | |
100 | ||
101 | static void __exit da9055_i2c_exit(void) | |
102 | { | |
103 | i2c_del_driver(&da9055_i2c_driver); | |
104 | } | |
105 | module_exit(da9055_i2c_exit); | |
106 | ||
107 | MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>"); | |
108 | MODULE_DESCRIPTION("I2C driver for Dialog DA9055 PMIC"); | |
109 | MODULE_LICENSE("GPL"); |