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