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
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
|
/*
* s5m87xx.c
*
* Copyright (c) 2011 Samsung Electronics Co., Ltd
* http://www.samsung.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/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/pm_runtime.h>
#include <linux/mutex.h>
#include <linux/gpio.h>
#include <linux/mfd/core.h>
#include <linux/mfd/s5m87xx/s5m-core.h>
#include <linux/mfd/s5m87xx/s5m-pmic.h>
#include <linux/mfd/s5m87xx/s5m-rtc.h>
static struct mfd_cell s5m87xx_devs[] = {
{
.name = "s5m8767-pmic",
}, {
.name = "s5m8763-pmic",
}, {
.name = "s5m-rtc",
},
};
int s5m_reg_read(struct i2c_client *i2c, u8 reg, u8 *dest)
{
struct s5m87xx_dev *s5m87xx = i2c_get_clientdata(i2c);
int ret;
mutex_lock(&s5m87xx->iolock);
ret = i2c_smbus_read_byte_data(i2c, reg);
mutex_unlock(&s5m87xx->iolock);
if (ret < 0)
return ret;
ret &= 0xff;
*dest = ret;
return 0;
}
EXPORT_SYMBOL(s5m_reg_read);
int s5m_bulk_read(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
{
struct s5m87xx_dev *s5m87xx = i2c_get_clientdata(i2c);
int ret;
mutex_lock(&s5m87xx->iolock);
ret = i2c_smbus_read_i2c_block_data(i2c, reg, count, buf);
mutex_unlock(&s5m87xx->iolock);
if (ret < 0)
return ret;
return 0;
}
EXPORT_SYMBOL(s5m_bulk_read);
int s5m_reg_write(struct i2c_client *i2c, u8 reg, u8 value)
{
struct s5m87xx_dev *s5m87xx = i2c_get_clientdata(i2c);
int ret;
mutex_lock(&s5m87xx->iolock);
ret = i2c_smbus_write_byte_data(i2c, reg, value);
mutex_unlock(&s5m87xx->iolock);
return ret;
}
EXPORT_SYMBOL(s5m_reg_write);
int s5m_bulk_write(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
{
struct s5m87xx_dev *s5m87xx = i2c_get_clientdata(i2c);
int ret;
mutex_lock(&s5m87xx->iolock);
ret = i2c_smbus_write_i2c_block_data(i2c, reg, count, buf);
mutex_unlock(&s5m87xx->iolock);
if (ret < 0)
return ret;
return 0;
}
EXPORT_SYMBOL(s5m_bulk_write);
int s5m_reg_update(struct i2c_client *i2c, u8 reg, u8 val, u8 mask)
{
struct s5m87xx_dev *s5m87xx = i2c_get_clientdata(i2c);
int ret;
mutex_lock(&s5m87xx->iolock);
ret = i2c_smbus_read_byte_data(i2c, reg);
if (ret >= 0) {
u8 old_val = ret & 0xff;
u8 new_val = (val & mask) | (old_val & (~mask));
ret = i2c_smbus_write_byte_data(i2c, reg, new_val);
}
mutex_unlock(&s5m87xx->iolock);
return ret;
}
EXPORT_SYMBOL(s5m_reg_update);
static int s5m87xx_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct s5m_platform_data *pdata = i2c->dev.platform_data;
struct s5m87xx_dev *s5m87xx;
int ret = 0;
s5m87xx = kzalloc(sizeof(struct s5m87xx_dev), GFP_KERNEL);
if (s5m87xx == NULL)
return -ENOMEM;
i2c_set_clientdata(i2c, s5m87xx);
s5m87xx->dev = &i2c->dev;
s5m87xx->i2c = i2c;
s5m87xx->irq = gpio_to_irq(pdata->irq_gpio);
s5m87xx->type = id->driver_data;
if (pdata) {
s5m87xx->device_type = pdata->device_type;
s5m87xx->ono = pdata->ono;
s5m87xx->irq_base = pdata->irq_base;
s5m87xx->wakeup = pdata->wakeup;
s5m87xx->wtsr_smpl = pdata->wtsr_smpl;
}
mutex_init(&s5m87xx->iolock);
s5m87xx->rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR);
i2c_set_clientdata(s5m87xx->rtc, s5m87xx);
if (pdata && pdata->cfg_pmic_irq)
pdata->cfg_pmic_irq();
s5m_irq_init(s5m87xx);
pm_runtime_set_active(s5m87xx->dev);
ret = mfd_add_devices(s5m87xx->dev, -1,
s5m87xx_devs, ARRAY_SIZE(s5m87xx_devs),
NULL, 0);
if (ret < 0)
goto err;
dev_info(s5m87xx->dev ,"S5M87xx MFD probe done!!! \n");
return ret;
err:
mfd_remove_devices(s5m87xx->dev);
s5m_irq_exit(s5m87xx);
i2c_unregister_device(s5m87xx->rtc);
kfree(s5m87xx);
return ret;
}
static int s5m87xx_i2c_remove(struct i2c_client *i2c)
{
struct s5m87xx_dev *s5m87xx = i2c_get_clientdata(i2c);
mfd_remove_devices(s5m87xx->dev);
s5m_irq_exit(s5m87xx);
i2c_unregister_device(s5m87xx->rtc);
kfree(s5m87xx);
return 0;
}
static const struct i2c_device_id s5m87xx_i2c_id[] = {
{ "s5m87xx", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, s5m87xx_i2c_id);
#ifdef CONFIG_PM
static int s5m_suspend(struct device *dev)
{
struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
struct s5m87xx_dev *s5m87xx = i2c_get_clientdata(i2c);
if (s5m87xx->wakeup)
enable_irq_wake(s5m87xx->irq);
disable_irq(s5m87xx->irq);
return 0;
}
static int s5m_resume(struct device *dev)
{
struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
struct s5m87xx_dev *s5m87xx = i2c_get_clientdata(i2c);
if (s5m87xx->wakeup)
disable_irq_wake(s5m87xx->irq);
enable_irq(s5m87xx->irq);
return 0;
}
#else
#define s5m_suspend NULL
#define s5m_resume NULL
#endif /* CONFIG_PM */
const struct dev_pm_ops s5m87xx_apm = {
.suspend = s5m_suspend,
.resume = s5m_resume,
};
static struct i2c_driver s5m87xx_i2c_driver = {
.driver = {
.name = "s5m87xx",
.owner = THIS_MODULE,
.pm = &s5m87xx_apm,
},
.probe = s5m87xx_i2c_probe,
.remove = s5m87xx_i2c_remove,
.id_table = s5m87xx_i2c_id,
};
static int __init s5m87xx_i2c_init(void)
{
return i2c_add_driver(&s5m87xx_i2c_driver);
}
subsys_initcall(s5m87xx_i2c_init);
static void __exit s5m87xx_i2c_exit(void)
{
i2c_del_driver(&s5m87xx_i2c_driver);
}
module_exit(s5m87xx_i2c_exit);
MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
MODULE_DESCRIPTION("Core support for the S5M87XX MFD");
MODULE_LICENSE("GPL");
|
