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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * ADT7410/ADT7420 digital temperature sensor driver4 *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");110