// SPDX-License-Identifier: GPL-2.0
/*
 * AD5338R, AD5671R, AD5673R, AD5675R, AD5677R, AD5691R, AD5692R, AD5693,
 * AD5693R, AD5694, AD5694R, AD5695R, AD5696, AD5696R
 * Digital to analog converters driver
 *
 * Copyright 2018 Analog Devices Inc.
 */

#include "ad5686.h"

#include <linux/module.h>
#include <linux/i2c.h>

static int ad5686_i2c_read(struct ad5686_state *st, u8 addr)
{
        struct i2c_client *i2c = to_i2c_client(st->dev);
        struct i2c_msg msg[2] = {
                {
                        .addr = i2c->addr,
                        .flags = i2c->flags,
                        .len = 3,
                        .buf = &st->data[0].d8[1],
                },
                {
                        .addr = i2c->addr,
                        .flags = i2c->flags | I2C_M_RD,
                        .len = 2,
                        .buf = (char *)&st->data[0].d16,
                },
        };
        int ret;

        st->data[0].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_NOOP) |
                                      AD5686_ADDR(addr) |
                                      0x00);

        ret = i2c_transfer(i2c->adapter, msg, 2);
        if (ret < 0)
                return ret;

        return be16_to_cpu(st->data[0].d16);
}

static int ad5686_i2c_write(struct ad5686_state *st,
                            u8 cmd, u8 addr, u16 val)
{
        struct i2c_client *i2c = to_i2c_client(st->dev);
        int ret;

        st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) | AD5686_ADDR(addr)
                                      | val);

        ret = i2c_master_send(i2c, &st->data[0].d8[1], 3);
        if (ret < 0)
                return ret;

        return (ret != 3) ? -EIO : 0;
}

static int ad5686_i2c_probe(struct i2c_client *i2c)
{
        const struct i2c_device_id *id = i2c_client_get_device_id(i2c);
        return ad5686_probe(&i2c->dev, id->driver_data, id->name,
                            ad5686_i2c_write, ad5686_i2c_read);
}

static const struct i2c_device_id ad5686_i2c_id[] = {
        {"ad5311r", ID_AD5311R},
        {"ad5337r", ID_AD5337R},
        {"ad5338r", ID_AD5338R},
        {"ad5671r", ID_AD5671R},
        {"ad5673r", ID_AD5673R},
        {"ad5675r", ID_AD5675R},
        {"ad5677r", ID_AD5677R},
        {"ad5691r", ID_AD5691R},
        {"ad5692r", ID_AD5692R},
        {"ad5693", ID_AD5693},
        {"ad5693r", ID_AD5693R},
        {"ad5694", ID_AD5694},
        {"ad5694r", ID_AD5694R},
        {"ad5695r", ID_AD5695R},
        {"ad5696", ID_AD5696},
        {"ad5696r", ID_AD5696R},
        { }
};
MODULE_DEVICE_TABLE(i2c, ad5686_i2c_id);

static const struct of_device_id ad5686_of_match[] = {
        { .compatible = "adi,ad5311r" },
        { .compatible = "adi,ad5337r" },
        { .compatible = "adi,ad5338r" },
        { .compatible = "adi,ad5671r" },
        { .compatible = "adi,ad5675r" },
        { .compatible = "adi,ad5691r" },
        { .compatible = "adi,ad5692r" },
        { .compatible = "adi,ad5693" },
        { .compatible = "adi,ad5693r" },
        { .compatible = "adi,ad5694" },
        { .compatible = "adi,ad5694r" },
        { .compatible = "adi,ad5695r" },
        { .compatible = "adi,ad5696" },
        { .compatible = "adi,ad5696r" },
        { }
};
MODULE_DEVICE_TABLE(of, ad5686_of_match);

static struct i2c_driver ad5686_i2c_driver = {
        .driver = {
                .name = "ad5696",
                .of_match_table = ad5686_of_match,
        },
        .probe = ad5686_i2c_probe,
        .id_table = ad5686_i2c_id,
};

module_i2c_driver(ad5686_i2c_driver);

MODULE_AUTHOR("Stefan Popa <stefan.popa@analog.com>");
MODULE_DESCRIPTION("Analog Devices AD5686 and similar multi-channel DACs");
MODULE_LICENSE("GPL v2");
MODULE_IMPORT_NS("IIO_AD5686");