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 int da9055_i2c_remove(struct i2c_client *i2c)
45 {
46 struct da9055 *da9055 = i2c_get_clientdata(i2c);
47
48 da9055_device_exit(da9055);
49
50 return 0;
51 }
52
53 /*
54 * DO NOT change the device Ids. The naming is intentionally specific as both
55 * the PMIC and CODEC parts of this chip are instantiated separately as I2C
56 * devices (both have configurable I2C addresses, and are to all intents and
57 * purposes separate). As a result there are specific DA9055 ids for PMIC
58 * and CODEC, which must be different to operate together.
59 */
60 static const struct i2c_device_id da9055_i2c_id[] = {
61 {"da9055-pmic", 0},
62 { }
63 };
64 MODULE_DEVICE_TABLE(i2c, da9055_i2c_id);
65
66 static const struct of_device_id da9055_of_match[] = {
67 { .compatible = "dlg,da9055-pmic", },
68 { }
69 };
70
71 static struct i2c_driver da9055_i2c_driver = {
72 .probe = da9055_i2c_probe,
73 .remove = da9055_i2c_remove,
74 .id_table = da9055_i2c_id,
75 .driver = {
76 .name = "da9055-pmic",
77 .of_match_table = of_match_ptr(da9055_of_match),
78 },
79 };
80
da9055_i2c_init(void)81 static int __init da9055_i2c_init(void)
82 {
83 int ret;
84
85 ret = i2c_add_driver(&da9055_i2c_driver);
86 if (ret != 0) {
87 pr_err("DA9055 I2C registration failed %d\n", ret);
88 return ret;
89 }
90
91 return 0;
92 }
93 subsys_initcall(da9055_i2c_init);
94
da9055_i2c_exit(void)95 static void __exit da9055_i2c_exit(void)
96 {
97 i2c_del_driver(&da9055_i2c_driver);
98 }
99 module_exit(da9055_i2c_exit);
100
101 MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
102 MODULE_DESCRIPTION("I2C driver for Dialog DA9055 PMIC");
103 MODULE_LICENSE("GPL");
104
