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ad1519d587
Add support for the ADT7422 high accuracy digital temperature sensor. It's identical to the other chips supported in the driver so we just need to add it to the ID tables. Co-developed-by: Cosmin Tanislav <demonsingur@gmail.com> Signed-off-by: Cosmin Tanislav <demonsingur@gmail.com> Signed-off-by: Nuno Sá <nuno.sa@analog.com> Link: https://lore.kernel.org/r/20251015-dev-add-adt7422-v1-3-7cf72d3253ad@analog.com Signed-off-by: Guenter Roeck <linux@roeck-us.net>
121 lines
2.6 KiB
C
121 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* ADT7410/ADT7420 digital temperature sensor driver
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*
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* Copyright 2012-2013 Analog Devices Inc.
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* Author: Lars-Peter Clausen <lars@metafoo.de>
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*/
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#include <linux/module.h>
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#include <linux/mod_devicetable.h>
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#include <linux/init.h>
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#include <linux/i2c.h>
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#include <linux/regmap.h>
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#include "adt7x10.h"
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static bool adt7410_regmap_is_volatile(struct device *dev, unsigned int reg)
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{
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switch (reg) {
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case ADT7X10_TEMPERATURE:
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case ADT7X10_STATUS:
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return true;
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default:
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return false;
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}
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}
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static int adt7410_reg_read(void *context, unsigned int reg, unsigned int *val)
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{
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struct i2c_client *client = context;
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int regval;
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switch (reg) {
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case ADT7X10_TEMPERATURE:
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case ADT7X10_T_ALARM_HIGH:
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case ADT7X10_T_ALARM_LOW:
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case ADT7X10_T_CRIT:
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regval = i2c_smbus_read_word_swapped(client, reg);
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break;
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default:
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regval = i2c_smbus_read_byte_data(client, reg);
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break;
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}
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if (regval < 0)
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return regval;
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*val = regval;
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return 0;
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}
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static int adt7410_reg_write(void *context, unsigned int reg, unsigned int val)
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{
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struct i2c_client *client = context;
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int ret;
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switch (reg) {
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case ADT7X10_TEMPERATURE:
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case ADT7X10_T_ALARM_HIGH:
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case ADT7X10_T_ALARM_LOW:
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case ADT7X10_T_CRIT:
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ret = i2c_smbus_write_word_swapped(client, reg, val);
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break;
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default:
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ret = i2c_smbus_write_byte_data(client, reg, val);
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break;
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}
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return ret;
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}
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static const struct regmap_config adt7410_regmap_config = {
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.reg_bits = 8,
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.val_bits = 16,
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.max_register = ADT7X10_ID,
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.cache_type = REGCACHE_MAPLE,
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.volatile_reg = adt7410_regmap_is_volatile,
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.reg_read = adt7410_reg_read,
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.reg_write = adt7410_reg_write,
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};
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static int adt7410_i2c_probe(struct i2c_client *client)
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{
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struct regmap *regmap;
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regmap = devm_regmap_init(&client->dev, NULL, client,
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&adt7410_regmap_config);
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if (IS_ERR(regmap))
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return PTR_ERR(regmap);
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return adt7x10_probe(&client->dev, client->name, client->irq, regmap);
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}
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static const struct i2c_device_id adt7410_ids[] = {
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{ "adt7410" },
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{ "adt7420" },
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{ "adt7422" },
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{}
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};
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MODULE_DEVICE_TABLE(i2c, adt7410_ids);
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static const struct of_device_id adt7410_of_match[] = {
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{ .compatible = "adi,adt7410" },
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{ .compatible = "adi,adt7420" },
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{ .compatible = "adi,adt7422" },
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{ }
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};
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MODULE_DEVICE_TABLE(of, adt7410_of_match);
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static struct i2c_driver adt7410_driver = {
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.driver = {
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.name = "adt7410",
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.pm = pm_sleep_ptr(&adt7x10_dev_pm_ops),
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.of_match_table = adt7410_of_match,
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},
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.probe = adt7410_i2c_probe,
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.id_table = adt7410_ids,
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};
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module_i2c_driver(adt7410_driver);
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MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
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MODULE_DESCRIPTION("ADT7410/AD7420 driver");
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MODULE_LICENSE("GPL");
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