Loading...
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * ADT7410/ADT7420 digital temperature sensor driver
4 *
5 * Copyright 2012-2013 Analog Devices Inc.
6 * Author: Lars-Peter Clausen <lars@metafoo.de>
7 */
8
9#include <linux/module.h>
10#include <linux/init.h>
11#include <linux/i2c.h>
12#include <linux/regmap.h>
13
14#include "adt7x10.h"
15
16static bool adt7410_regmap_is_volatile(struct device *dev, unsigned int reg)
17{
18 switch (reg) {
19 case ADT7X10_TEMPERATURE:
20 case ADT7X10_STATUS:
21 return true;
22 default:
23 return false;
24 }
25}
26
27static int adt7410_reg_read(void *context, unsigned int reg, unsigned int *val)
28{
29 struct i2c_client *client = context;
30 int regval;
31
32 switch (reg) {
33 case ADT7X10_TEMPERATURE:
34 case ADT7X10_T_ALARM_HIGH:
35 case ADT7X10_T_ALARM_LOW:
36 case ADT7X10_T_CRIT:
37 regval = i2c_smbus_read_word_swapped(client, reg);
38 break;
39 default:
40 regval = i2c_smbus_read_byte_data(client, reg);
41 break;
42 }
43 if (regval < 0)
44 return regval;
45 *val = regval;
46 return 0;
47}
48
49static int adt7410_reg_write(void *context, unsigned int reg, unsigned int val)
50{
51 struct i2c_client *client = context;
52 int ret;
53
54 switch (reg) {
55 case ADT7X10_TEMPERATURE:
56 case ADT7X10_T_ALARM_HIGH:
57 case ADT7X10_T_ALARM_LOW:
58 case ADT7X10_T_CRIT:
59 ret = i2c_smbus_write_word_swapped(client, reg, val);
60 break;
61 default:
62 ret = i2c_smbus_write_byte_data(client, reg, val);
63 break;
64 }
65 return ret;
66}
67
68static const struct regmap_config adt7410_regmap_config = {
69 .reg_bits = 8,
70 .val_bits = 16,
71 .max_register = ADT7X10_ID,
72 .cache_type = REGCACHE_MAPLE,
73 .volatile_reg = adt7410_regmap_is_volatile,
74 .reg_read = adt7410_reg_read,
75 .reg_write = adt7410_reg_write,
76};
77
78static int adt7410_i2c_probe(struct i2c_client *client)
79{
80 struct regmap *regmap;
81
82 regmap = devm_regmap_init(&client->dev, NULL, client,
83 &adt7410_regmap_config);
84 if (IS_ERR(regmap))
85 return PTR_ERR(regmap);
86
87 return adt7x10_probe(&client->dev, client->name, client->irq, regmap);
88}
89
90static const struct i2c_device_id adt7410_ids[] = {
91 { "adt7410" },
92 { "adt7420" },
93 {}
94};
95MODULE_DEVICE_TABLE(i2c, adt7410_ids);
96
97static struct i2c_driver adt7410_driver = {
98 .driver = {
99 .name = "adt7410",
100 .pm = pm_sleep_ptr(&adt7x10_dev_pm_ops),
101 },
102 .probe = adt7410_i2c_probe,
103 .id_table = adt7410_ids,
104};
105module_i2c_driver(adt7410_driver);
106
107MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
108MODULE_DESCRIPTION("ADT7410/AD7420 driver");
109MODULE_LICENSE("GPL");
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * ADT7410/ADT7420 digital temperature sensor driver
4 *
5 * Copyright 2012-2013 Analog Devices Inc.
6 * Author: Lars-Peter Clausen <lars@metafoo.de>
7 */
8
9#include <linux/module.h>
10#include <linux/init.h>
11#include <linux/i2c.h>
12
13#include "adt7x10.h"
14
15static int adt7410_i2c_read_word(struct device *dev, u8 reg)
16{
17 return i2c_smbus_read_word_swapped(to_i2c_client(dev), reg);
18}
19
20static int adt7410_i2c_write_word(struct device *dev, u8 reg, u16 data)
21{
22 return i2c_smbus_write_word_swapped(to_i2c_client(dev), reg, data);
23}
24
25static int adt7410_i2c_read_byte(struct device *dev, u8 reg)
26{
27 return i2c_smbus_read_byte_data(to_i2c_client(dev), reg);
28}
29
30static int adt7410_i2c_write_byte(struct device *dev, u8 reg, u8 data)
31{
32 return i2c_smbus_write_byte_data(to_i2c_client(dev), reg, data);
33}
34
35static const struct adt7x10_ops adt7410_i2c_ops = {
36 .read_word = adt7410_i2c_read_word,
37 .write_word = adt7410_i2c_write_word,
38 .read_byte = adt7410_i2c_read_byte,
39 .write_byte = adt7410_i2c_write_byte,
40};
41
42static int adt7410_i2c_probe(struct i2c_client *client,
43 const struct i2c_device_id *id)
44{
45 if (!i2c_check_functionality(client->adapter,
46 I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA))
47 return -ENODEV;
48
49 return adt7x10_probe(&client->dev, NULL, client->irq, &adt7410_i2c_ops);
50}
51
52static int adt7410_i2c_remove(struct i2c_client *client)
53{
54 return adt7x10_remove(&client->dev, client->irq);
55}
56
57static const struct i2c_device_id adt7410_ids[] = {
58 { "adt7410", 0 },
59 { "adt7420", 0 },
60 {}
61};
62MODULE_DEVICE_TABLE(i2c, adt7410_ids);
63
64static struct i2c_driver adt7410_driver = {
65 .class = I2C_CLASS_HWMON,
66 .driver = {
67 .name = "adt7410",
68 .pm = ADT7X10_DEV_PM_OPS,
69 },
70 .probe = adt7410_i2c_probe,
71 .remove = adt7410_i2c_remove,
72 .id_table = adt7410_ids,
73 .address_list = I2C_ADDRS(0x48, 0x49, 0x4a, 0x4b),
74};
75module_i2c_driver(adt7410_driver);
76
77MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
78MODULE_DESCRIPTION("ADT7410/AD7420 driver");
79MODULE_LICENSE("GPL");