// 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/mod_devicetable.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_MAPLE,
        .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" },
        { "adt7420" },
        { "adt7422" },
        {}
};
MODULE_DEVICE_TABLE(i2c, adt7410_ids);

static const struct of_device_id adt7410_of_match[] = {
        { .compatible = "adi,adt7410" },
        { .compatible = "adi,adt7420" },
        { .compatible = "adi,adt7422" },
        { }
};
MODULE_DEVICE_TABLE(of, adt7410_of_match);

static struct i2c_driver adt7410_driver = {
        .driver = {
                .name   = "adt7410",
                .pm     = pm_sleep_ptr(&adt7x10_dev_pm_ops),
                .of_match_table = adt7410_of_match,
        },
        .probe          = adt7410_i2c_probe,
        .id_table       = adt7410_ids,
};
module_i2c_driver(adt7410_driver);

MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
MODULE_DESCRIPTION("ADT7410/AD7420 driver");
MODULE_LICENSE("GPL");