// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Honeywell ABP2 series pressure sensor driver
 *
 * Copyright (c) 2025 Petre Rodan <petre.rodan@subdimension.ro>
 */

#include <linux/device.h>
#include <linux/errno.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/types.h>

#include "abp2030pa.h"

static int abp2_i2c_read(struct abp2_data *data, u8 unused, u8 nbytes)
{
        struct i2c_client *client = to_i2c_client(data->dev);
        int ret;

        if (nbytes > ABP2_MEASUREMENT_RD_SIZE)
                return -EOVERFLOW;

        ret = i2c_master_recv(client, data->rx_buf, nbytes);
        if (ret < 0)
                return ret;
        if (ret != nbytes)
                return -EIO;

        return 0;
}

static int abp2_i2c_write(struct abp2_data *data, u8 cmd, u8 nbytes)
{
        struct i2c_client *client = to_i2c_client(data->dev);
        int ret;

        if (nbytes > ABP2_MEASUREMENT_RD_SIZE)
                return -EOVERFLOW;

        data->tx_buf[0] = cmd;
        ret = i2c_master_send(client, data->tx_buf, nbytes);
        if (ret < 0)
                return ret;
        if (ret != nbytes)
                return -EIO;

        return 0;
}

static const struct abp2_ops abp2_i2c_ops = {
        .read = abp2_i2c_read,
        .write = abp2_i2c_write,
};

static int abp2_i2c_probe(struct i2c_client *client)
{
        if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
                return -EOPNOTSUPP;

        return abp2_common_probe(&client->dev, &abp2_i2c_ops, client->irq);
}

static const struct of_device_id abp2_i2c_match[] = {
        { .compatible = "honeywell,abp2030pa" },
        { }
};
MODULE_DEVICE_TABLE(of, abp2_i2c_match);

static const struct i2c_device_id abp2_i2c_id[] = {
        { .name = "abp2030pa" },
        { }
};
MODULE_DEVICE_TABLE(i2c, abp2_i2c_id);

static struct i2c_driver abp2_i2c_driver = {
        .driver = {
                .name = "abp2030pa",
                .of_match_table = abp2_i2c_match,
        },
        .probe = abp2_i2c_probe,
        .id_table = abp2_i2c_id,
};
module_i2c_driver(abp2_i2c_driver);

MODULE_AUTHOR("Petre Rodan <petre.rodan@subdimension.ro>");
MODULE_DESCRIPTION("Honeywell ABP2 pressure sensor i2c driver");
MODULE_LICENSE("GPL");
MODULE_IMPORT_NS("IIO_HONEYWELL_ABP2030PA");