1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
|
/*
* I2C access for DA9052 PMICs.
*
* Copyright(c) 2011 Dialog Semiconductor Ltd.
*
* Author: David Dajun Chen <dchen@diasemi.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
*/
#include <linux/device.h>
#include <linux/module.h>
#include <linux/input.h>
#include <linux/mfd/core.h>
#include <linux/i2c.h>
#include <linux/err.h>
#include <linux/mfd/da9052/da9052.h>
#include <linux/mfd/da9052/reg.h>
#ifdef CONFIG_OF
#include <linux/of.h>
#include <linux/of_device.h>
#endif
static int da9052_i2c_enable_multiwrite(struct da9052 *da9052)
{
int reg_val, ret;
ret = regmap_read(da9052->regmap, DA9052_CONTROL_B_REG, ®_val);
if (ret < 0)
return ret;
if (reg_val & DA9052_CONTROL_B_WRITEMODE) {
reg_val &= ~DA9052_CONTROL_B_WRITEMODE;
ret = regmap_write(da9052->regmap, DA9052_CONTROL_B_REG,
reg_val);
if (ret < 0)
return ret;
}
return 0;
}
static struct i2c_device_id da9052_i2c_id[] = {
{"da9052", DA9052},
{"da9053-aa", DA9053_AA},
{"da9053-ba", DA9053_BA},
{"da9053-bb", DA9053_BB},
{}
};
#ifdef CONFIG_OF
static const struct of_device_id dialog_dt_ids[] = {
{ .compatible = "dlg,da9052", .data = &da9052_i2c_id[0] },
{ .compatible = "dlg,da9053-aa", .data = &da9052_i2c_id[1] },
{ .compatible = "dlg,da9053-ab", .data = &da9052_i2c_id[2] },
{ .compatible = "dlg,da9053-bb", .data = &da9052_i2c_id[3] },
{ /* sentinel */ }
};
#endif
static int __devinit da9052_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct da9052 *da9052;
int ret;
da9052 = kzalloc(sizeof(struct da9052), GFP_KERNEL);
if (!da9052)
return -ENOMEM;
if (!i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_BYTE_DATA)) {
dev_info(&client->dev, "Error in %s:i2c_check_functionality\n",
__func__);
ret = -ENODEV;
goto err;
}
da9052->dev = &client->dev;
da9052->chip_irq = client->irq;
i2c_set_clientdata(client, da9052);
da9052->regmap = regmap_init_i2c(client, &da9052_regmap_config);
if (IS_ERR(da9052->regmap)) {
ret = PTR_ERR(da9052->regmap);
dev_err(&client->dev, "Failed to allocate register map: %d\n",
ret);
goto err;
}
ret = da9052_i2c_enable_multiwrite(da9052);
if (ret < 0)
goto err_regmap;
#ifdef CONFIG_OF
if (!id) {
struct device_node *np = client->dev.of_node;
const struct of_device_id *deviceid;
deviceid = of_match_node(dialog_dt_ids, np);
id = (const struct i2c_device_id *)deviceid->data;
}
#endif
if (!id) {
ret = -ENODEV;
dev_err(&client->dev, "id is null.\n");
goto err_regmap;
}
ret = da9052_device_init(da9052, id->driver_data);
if (ret != 0)
goto err_regmap;
return 0;
err_regmap:
regmap_exit(da9052->regmap);
err:
kfree(da9052);
return ret;
}
static int __devexit da9052_i2c_remove(struct i2c_client *client)
{
struct da9052 *da9052 = i2c_get_clientdata(client);
da9052_device_exit(da9052);
regmap_exit(da9052->regmap);
kfree(da9052);
return 0;
}
static struct i2c_driver da9052_i2c_driver = {
.probe = da9052_i2c_probe,
.remove = __devexit_p(da9052_i2c_remove),
.id_table = da9052_i2c_id,
.driver = {
.name = "da9052",
.owner = THIS_MODULE,
#ifdef CONFIG_OF
.of_match_table = dialog_dt_ids,
#endif
},
};
static int __init da9052_i2c_init(void)
{
int ret;
ret = i2c_add_driver(&da9052_i2c_driver);
if (ret != 0) {
pr_err("DA9052 I2C registration failed %d\n", ret);
return ret;
}
return 0;
}
subsys_initcall(da9052_i2c_init);
static void __exit da9052_i2c_exit(void)
{
i2c_del_driver(&da9052_i2c_driver);
}
module_exit(da9052_i2c_exit);
MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
MODULE_DESCRIPTION("I2C driver for Dialog DA9052 PMIC");
MODULE_LICENSE("GPL");
|
