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Ashish Jangam28964342012-09-14 18:54:50 +05301 /* 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>
Adam Thomsond9a335152014-03-05 14:18:35 +000018#include <linux/of.h>
19#include <linux/of_device.h>
Ashish Jangam28964342012-09-14 18:54:50 +053020
21#include <linux/mfd/da9055/core.h>
22
Bill Pembertonf791be42012-11-19 13:23:04 -050023static int da9055_i2c_probe(struct i2c_client *i2c,
Ashish Jangam28964342012-09-14 18:54:50 +053024 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
Bill Pemberton4740f732012-11-19 13:26:01 -050049static int da9055_i2c_remove(struct i2c_client *i2c)
Ashish Jangam28964342012-09-14 18:54:50 +053050{
51 struct da9055 *da9055 = i2c_get_clientdata(i2c);
52
53 da9055_device_exit(da9055);
54
55 return 0;
56}
57
Adam Thomson07b0e5b2014-02-06 18:03:07 +000058/*
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 */
Ashish Jangam28964342012-09-14 18:54:50 +053065static struct i2c_device_id da9055_i2c_id[] = {
Adam Thomson07b0e5b2014-02-06 18:03:07 +000066 {"da9055-pmic", 0},
Ashish Jangam28964342012-09-14 18:54:50 +053067 { }
68};
Adam Thomson07b0e5b2014-02-06 18:03:07 +000069MODULE_DEVICE_TABLE(i2c, da9055_i2c_id);
Ashish Jangam28964342012-09-14 18:54:50 +053070
Adam Thomsond9a335152014-03-05 14:18:35 +000071static const struct of_device_id da9055_of_match[] = {
72 { .compatible = "dlg,da9055-pmic", },
73 { }
74};
75
Ashish Jangam28964342012-09-14 18:54:50 +053076static struct i2c_driver da9055_i2c_driver = {
77 .probe = da9055_i2c_probe,
Bill Pemberton84449212012-11-19 13:20:24 -050078 .remove = da9055_i2c_remove,
Ashish Jangam28964342012-09-14 18:54:50 +053079 .id_table = da9055_i2c_id,
80 .driver = {
Adam Thomson07b0e5b2014-02-06 18:03:07 +000081 .name = "da9055-pmic",
Ashish Jangam28964342012-09-14 18:54:50 +053082 .owner = THIS_MODULE,
Adam Thomsond9a335152014-03-05 14:18:35 +000083 .of_match_table = of_match_ptr(da9055_of_match),
Ashish Jangam28964342012-09-14 18:54:50 +053084 },
85};
86
87static 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}
99subsys_initcall(da9055_i2c_init);
100
101static void __exit da9055_i2c_exit(void)
102{
103 i2c_del_driver(&da9055_i2c_driver);
104}
105module_exit(da9055_i2c_exit);
106
107MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
108MODULE_DESCRIPTION("I2C driver for Dialog DA9055 PMIC");
109MODULE_LICENSE("GPL");