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
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* ADT7410/ADT7420 digital temperature sensor driver
*
* Copyright 2012-2013 Analog Devices Inc.
* Author: Lars-Peter Clausen <lars@metafoo.de>
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/regmap.h>
#include "adt7x10.h"
static bool adt7410_regmap_is_volatile(struct device *dev, unsigned int reg)
{
switch (reg) {
case ADT7X10_TEMPERATURE:
case ADT7X10_STATUS:
return true;
default:
return false;
}
}
static int adt7410_reg_read(void *context, unsigned int reg, unsigned int *val)
{
struct i2c_client *client = context;
int regval;
switch (reg) {
case ADT7X10_TEMPERATURE:
case ADT7X10_T_ALARM_HIGH:
case ADT7X10_T_ALARM_LOW:
case ADT7X10_T_CRIT:
regval = i2c_smbus_read_word_swapped(client, reg);
break;
default:
regval = i2c_smbus_read_byte_data(client, reg);
break;
}
if (regval < 0)
return regval;
*val = regval;
return 0;
}
static int adt7410_reg_write(void *context, unsigned int reg, unsigned int val)
{
struct i2c_client *client = context;
int ret;
switch (reg) {
case ADT7X10_TEMPERATURE:
case ADT7X10_T_ALARM_HIGH:
case ADT7X10_T_ALARM_LOW:
case ADT7X10_T_CRIT:
ret = i2c_smbus_write_word_swapped(client, reg, val);
break;
default:
ret = i2c_smbus_write_byte_data(client, reg, val);
break;
}
return ret;
}
static const struct regmap_config adt7410_regmap_config = {
.reg_bits = 8,
.val_bits = 16,
.max_register = ADT7X10_ID,
.cache_type = REGCACHE_RBTREE,
.volatile_reg = adt7410_regmap_is_volatile,
.reg_read = adt7410_reg_read,
.reg_write = adt7410_reg_write,
};
static int adt7410_i2c_probe(struct i2c_client *client)
{
struct regmap *regmap;
regmap = devm_regmap_init(&client->dev, NULL, client,
&adt7410_regmap_config);
if (IS_ERR(regmap))
return PTR_ERR(regmap);
return adt7x10_probe(&client->dev, client->name, client->irq, regmap);
}
static const struct i2c_device_id adt7410_ids[] = {
{ "adt7410", 0 },
{ "adt7420", 0 },
{}
};
MODULE_DEVICE_TABLE(i2c, adt7410_ids);
static struct i2c_driver adt7410_driver = {
.class = I2C_CLASS_HWMON,
.driver = {
.name = "adt7410",
.pm = pm_sleep_ptr(&adt7x10_dev_pm_ops),
},
.probe = adt7410_i2c_probe,
.id_table = adt7410_ids,
.address_list = I2C_ADDRS(0x48, 0x49, 0x4a, 0x4b),
};
module_i2c_driver(adt7410_driver);
MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
MODULE_DESCRIPTION("ADT7410/AD7420 driver");
MODULE_LICENSE("GPL");
|
