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
|
// SPDX-License-Identifier: GPL-2.0+
/*
* AD5671R, AD5675R, AD5691R, AD5692R, AD5693, AD5693R,
* AD5694, AD5694R, AD5695R, AD5696, AD5696R
* Digital to analog converters driver
*
* Copyright 2018 Analog Devices Inc.
*/
#include "ad5686.h"
#include <linux/module.h>
#include <linux/i2c.h>
static int ad5686_i2c_read(struct ad5686_state *st, u8 addr)
{
struct i2c_client *i2c = to_i2c_client(st->dev);
struct i2c_msg msg[2] = {
{
.addr = i2c->addr,
.flags = i2c->flags,
.len = 3,
.buf = &st->data[0].d8[1],
},
{
.addr = i2c->addr,
.flags = i2c->flags | I2C_M_RD,
.len = 2,
.buf = (char *)&st->data[0].d16,
},
};
int ret;
st->data[0].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_NOOP) |
AD5686_ADDR(addr) |
0x00);
ret = i2c_transfer(i2c->adapter, msg, 2);
if (ret < 0)
return ret;
return be16_to_cpu(st->data[0].d16);
}
static int ad5686_i2c_write(struct ad5686_state *st,
u8 cmd, u8 addr, u16 val)
{
struct i2c_client *i2c = to_i2c_client(st->dev);
int ret;
st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) | AD5686_ADDR(addr)
| val);
ret = i2c_master_send(i2c, &st->data[0].d8[1], 3);
if (ret < 0)
return ret;
return (ret != 3) ? -EIO : 0;
}
static int ad5686_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
return ad5686_probe(&i2c->dev, id->driver_data, id->name,
ad5686_i2c_write, ad5686_i2c_read);
}
static int ad5686_i2c_remove(struct i2c_client *i2c)
{
return ad5686_remove(&i2c->dev);
}
static const struct i2c_device_id ad5686_i2c_id[] = {
{"ad5311r", ID_AD5311R},
{"ad5671r", ID_AD5671R},
{"ad5675r", ID_AD5675R},
{"ad5691r", ID_AD5691R},
{"ad5692r", ID_AD5692R},
{"ad5693", ID_AD5693},
{"ad5693r", ID_AD5693R},
{"ad5694", ID_AD5694},
{"ad5694r", ID_AD5694R},
{"ad5695r", ID_AD5695R},
{"ad5696", ID_AD5696},
{"ad5696r", ID_AD5696R},
{}
};
MODULE_DEVICE_TABLE(i2c, ad5686_i2c_id);
static struct i2c_driver ad5686_i2c_driver = {
.driver = {
.name = "ad5696",
},
.probe = ad5686_i2c_probe,
.remove = ad5686_i2c_remove,
.id_table = ad5686_i2c_id,
};
module_i2c_driver(ad5686_i2c_driver);
MODULE_AUTHOR("Stefan Popa <stefan.popa@analog.com>");
MODULE_DESCRIPTION("Analog Devices AD5686 and similar multi-channel DACs");
MODULE_LICENSE("GPL v2");
|
