1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* I2C access for DA9055 PMICs. |
3 | * |
4 | * Copyright(c) 2012 Dialog Semiconductor Ltd. |
5 | * |
6 | * Author: David Dajun Chen <dchen@diasemi.com> |
7 | */ |
8 | |
9 | #include <linux/module.h> |
10 | #include <linux/device.h> |
11 | #include <linux/i2c.h> |
12 | #include <linux/err.h> |
13 | #include <linux/of.h> |
14 | |
15 | #include <linux/mfd/da9055/core.h> |
16 | |
17 | static int da9055_i2c_probe(struct i2c_client *i2c) |
18 | { |
19 | struct da9055 *da9055; |
20 | int ret; |
21 | |
22 | da9055 = devm_kzalloc(dev: &i2c->dev, size: sizeof(struct da9055), GFP_KERNEL); |
23 | if (!da9055) |
24 | return -ENOMEM; |
25 | |
26 | da9055->regmap = devm_regmap_init_i2c(i2c, &da9055_regmap_config); |
27 | if (IS_ERR(ptr: da9055->regmap)) { |
28 | ret = PTR_ERR(ptr: da9055->regmap); |
29 | dev_err(&i2c->dev, "Failed to allocate register map: %d\n" , |
30 | ret); |
31 | return ret; |
32 | } |
33 | |
34 | da9055->dev = &i2c->dev; |
35 | da9055->chip_irq = i2c->irq; |
36 | |
37 | i2c_set_clientdata(client: i2c, data: da9055); |
38 | |
39 | return da9055_device_init(da9055); |
40 | } |
41 | |
42 | static void da9055_i2c_remove(struct i2c_client *i2c) |
43 | { |
44 | struct da9055 *da9055 = i2c_get_clientdata(client: i2c); |
45 | |
46 | da9055_device_exit(da9055); |
47 | } |
48 | |
49 | /* |
50 | * DO NOT change the device Ids. The naming is intentionally specific as both |
51 | * the PMIC and CODEC parts of this chip are instantiated separately as I2C |
52 | * devices (both have configurable I2C addresses, and are to all intents and |
53 | * purposes separate). As a result there are specific DA9055 ids for PMIC |
54 | * and CODEC, which must be different to operate together. |
55 | */ |
56 | static const struct i2c_device_id da9055_i2c_id[] = { |
57 | {"da9055-pmic" , 0}, |
58 | { } |
59 | }; |
60 | MODULE_DEVICE_TABLE(i2c, da9055_i2c_id); |
61 | |
62 | static const struct of_device_id da9055_of_match[] = { |
63 | { .compatible = "dlg,da9055-pmic" , }, |
64 | { } |
65 | }; |
66 | |
67 | static struct i2c_driver da9055_i2c_driver = { |
68 | .probe = da9055_i2c_probe, |
69 | .remove = da9055_i2c_remove, |
70 | .id_table = da9055_i2c_id, |
71 | .driver = { |
72 | .name = "da9055-pmic" , |
73 | .of_match_table = da9055_of_match, |
74 | }, |
75 | }; |
76 | |
77 | static int __init da9055_i2c_init(void) |
78 | { |
79 | int ret; |
80 | |
81 | ret = i2c_add_driver(&da9055_i2c_driver); |
82 | if (ret != 0) { |
83 | pr_err("DA9055 I2C registration failed %d\n" , ret); |
84 | return ret; |
85 | } |
86 | |
87 | return 0; |
88 | } |
89 | subsys_initcall(da9055_i2c_init); |
90 | |
91 | static void __exit da9055_i2c_exit(void) |
92 | { |
93 | i2c_del_driver(driver: &da9055_i2c_driver); |
94 | } |
95 | module_exit(da9055_i2c_exit); |
96 | |
97 | MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>" ); |
98 | MODULE_DESCRIPTION("I2C driver for Dialog DA9055 PMIC" ); |
99 | |