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 #include <linux/of_device.h>
15
16 #include <linux/mfd/da9055/core.h>
17
da9055_i2c_probe(struct i2c_client * i2c,const struct i2c_device_id * id)18 static int da9055_i2c_probe(struct i2c_client *i2c,
19 const struct i2c_device_id *id)
20 {
21 struct da9055 *da9055;
22 int ret;
23
24 da9055 = devm_kzalloc(&i2c->dev, sizeof(struct da9055), GFP_KERNEL);
25 if (!da9055)
26 return -ENOMEM;
27
28 da9055->regmap = devm_regmap_init_i2c(i2c, &da9055_regmap_config);
29 if (IS_ERR(da9055->regmap)) {
30 ret = PTR_ERR(da9055->regmap);
31 dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
32 ret);
33 return ret;
34 }
35
36 da9055->dev = &i2c->dev;
37 da9055->chip_irq = i2c->irq;
38
39 i2c_set_clientdata(i2c, da9055);
40
41 return da9055_device_init(da9055);
42 }
43
da9055_i2c_remove(struct i2c_client * i2c)44 static void da9055_i2c_remove(struct i2c_client *i2c)
45 {
46 struct da9055 *da9055 = i2c_get_clientdata(i2c);
47
48 da9055_device_exit(da9055);
49 }
50
51 /*
52 * DO NOT change the device Ids. The naming is intentionally specific as both
53 * the PMIC and CODEC parts of this chip are instantiated separately as I2C
54 * devices (both have configurable I2C addresses, and are to all intents and
55 * purposes separate). As a result there are specific DA9055 ids for PMIC
56 * and CODEC, which must be different to operate together.
57 */
58 static const struct i2c_device_id da9055_i2c_id[] = {
59 {"da9055-pmic", 0},
60 { }
61 };
62 MODULE_DEVICE_TABLE(i2c, da9055_i2c_id);
63
64 static const struct of_device_id da9055_of_match[] = {
65 { .compatible = "dlg,da9055-pmic", },
66 { }
67 };
68
69 static struct i2c_driver da9055_i2c_driver = {
70 .probe = da9055_i2c_probe,
71 .remove = da9055_i2c_remove,
72 .id_table = da9055_i2c_id,
73 .driver = {
74 .name = "da9055-pmic",
75 .of_match_table = da9055_of_match,
76 },
77 };
78
da9055_i2c_init(void)79 static int __init da9055_i2c_init(void)
80 {
81 int ret;
82
83 ret = i2c_add_driver(&da9055_i2c_driver);
84 if (ret != 0) {
85 pr_err("DA9055 I2C registration failed %d\n", ret);
86 return ret;
87 }
88
89 return 0;
90 }
91 subsys_initcall(da9055_i2c_init);
92
da9055_i2c_exit(void)93 static void __exit da9055_i2c_exit(void)
94 {
95 i2c_del_driver(&da9055_i2c_driver);
96 }
97 module_exit(da9055_i2c_exit);
98
99 MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
100 MODULE_DESCRIPTION("I2C driver for Dialog DA9055 PMIC");
101 MODULE_LICENSE("GPL");
102
