1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * ADT7410/ADT7420 digital temperature sensor driver
5 * Copyright 2012-2013 Analog Devices Inc.
6 * Author: Lars-Peter Clausen <lars@metafoo.de>
9 #include <linux/module.h>
10 #include <linux/init.h>
11 #include <linux/i2c.h>
12 #include <linux/regmap.h>
16 static bool adt7410_regmap_is_volatile(struct device *dev, unsigned int reg)
19 case ADT7X10_TEMPERATURE:
27 static int adt7410_reg_read(void *context, unsigned int reg, unsigned int *val)
29 struct i2c_client *client = context;
33 case ADT7X10_TEMPERATURE:
34 case ADT7X10_T_ALARM_HIGH:
35 case ADT7X10_T_ALARM_LOW:
37 regval = i2c_smbus_read_word_swapped(client, reg);
40 regval = i2c_smbus_read_byte_data(client, reg);
49 static int adt7410_reg_write(void *context, unsigned int reg, unsigned int val)
51 struct i2c_client *client = context;
55 case ADT7X10_TEMPERATURE:
56 case ADT7X10_T_ALARM_HIGH:
57 case ADT7X10_T_ALARM_LOW:
59 ret = i2c_smbus_write_word_swapped(client, reg, val);
62 ret = i2c_smbus_write_byte_data(client, reg, val);
68 static const struct regmap_config adt7410_regmap_config = {
71 .max_register = ADT7X10_ID,
72 .cache_type = REGCACHE_RBTREE,
73 .volatile_reg = adt7410_regmap_is_volatile,
74 .reg_read = adt7410_reg_read,
75 .reg_write = adt7410_reg_write,
78 static int adt7410_i2c_probe(struct i2c_client *client)
80 struct regmap *regmap;
82 regmap = devm_regmap_init(&client->dev, NULL, client,
83 &adt7410_regmap_config);
85 return PTR_ERR(regmap);
87 return adt7x10_probe(&client->dev, client->name, client->irq, regmap);
90 static const struct i2c_device_id adt7410_ids[] = {
95 MODULE_DEVICE_TABLE(i2c, adt7410_ids);
97 static struct i2c_driver adt7410_driver = {
98 .class = I2C_CLASS_HWMON,
101 .pm = pm_sleep_ptr(&adt7x10_dev_pm_ops),
103 .probe = adt7410_i2c_probe,
104 .id_table = adt7410_ids,
105 .address_list = I2C_ADDRS(0x48, 0x49, 0x4a, 0x4b),
107 module_i2c_driver(adt7410_driver);
109 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
110 MODULE_DESCRIPTION("ADT7410/AD7420 driver");
111 MODULE_LICENSE("GPL");