// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Goodix Berlin Touchscreen Driver
 *
 * Copyright (C) 2020 - 2021 Goodix, Inc.
 * Copyright (C) 2023 Linaro Ltd.
 *
 * Based on goodix_ts_berlin driver.
 */
#include <linux/i2c.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/regmap.h>
#include <linux/input.h>

#include "goodix_berlin.h"

#define I2C_MAX_TRANSFER_SIZE           256

static const struct regmap_config goodix_berlin_i2c_regmap_conf = {
        .reg_bits = 32,
        .val_bits = 8,
        .max_raw_read = I2C_MAX_TRANSFER_SIZE,
        .max_raw_write = I2C_MAX_TRANSFER_SIZE,
};

/* vendor & product left unassigned here, should probably be updated from fw info */
static const struct input_id goodix_berlin_i2c_input_id = {
        .bustype = BUS_I2C,
};

static int goodix_berlin_i2c_probe(struct i2c_client *client)
{
        const struct goodix_berlin_ic_data *ic_data =
                i2c_get_match_data(client);
        struct regmap *regmap;
        int error;

        regmap = devm_regmap_init_i2c(client, &goodix_berlin_i2c_regmap_conf);
        if (IS_ERR(regmap))
                return PTR_ERR(regmap);

        error = goodix_berlin_probe(&client->dev, client->irq,
                                    &goodix_berlin_i2c_input_id, regmap,
                                    ic_data);
        if (error)
                return error;

        return 0;
}

static const struct goodix_berlin_ic_data gt9916_data = {
        .fw_version_info_addr = GOODIX_BERLIN_FW_VERSION_INFO_ADDR_D,
        .ic_info_addr = GOODIX_BERLIN_IC_INFO_ADDR_D,
};

static const struct i2c_device_id goodix_berlin_i2c_id[] = {
        { .name = "gt9916", .driver_data = (long)&gt9916_data },
        { }
};

MODULE_DEVICE_TABLE(i2c, goodix_berlin_i2c_id);

static const struct of_device_id goodix_berlin_i2c_of_match[] = {
        { .compatible = "goodix,gt9916", .data = &gt9916_data },
        { }
};
MODULE_DEVICE_TABLE(of, goodix_berlin_i2c_of_match);

static struct i2c_driver goodix_berlin_i2c_driver = {
        .driver = {
                .name = "goodix-berlin-i2c",
                .of_match_table = goodix_berlin_i2c_of_match,
                .pm = pm_sleep_ptr(&goodix_berlin_pm_ops),
                .dev_groups = goodix_berlin_groups,
        },
        .probe = goodix_berlin_i2c_probe,
        .id_table = goodix_berlin_i2c_id,
};
module_i2c_driver(goodix_berlin_i2c_driver);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Goodix Berlin I2C Touchscreen driver");
MODULE_AUTHOR("Neil Armstrong <neil.armstrong@linaro.org>");